/* ── Edu Hives stylesheet ── */
:root {
  --teal:        #1a7a6e;
  --teal-d:      #145f55;
  --teal-l:      #e6f4f2;
  --teal-b:      #a8d8d3;
  --amber:       #b06c10;
  --amber-l:     #fef4e6;
  --green:       #1a6e3a;
  --green-l:     #e8f5ee;
  --green-b:     #a8d4b8;
  --red:         #991a1a;
  --red-l:       #fdf0f0;
  --red-b:       #d4a0a0;
  --ink:         #12100e;
  --ink2:        #5a5550;
  --ink3:        #7a7570;
  --paper:       #faf8f4;
  --surface:     #ffffff;
  --surface2:    #f2efe8;
  --border:      #bfb9af;
  --border2:     #a09890;
  --r:           10px;
  --rl:          14px;
}

*   { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Sora', sans-serif; background: var(--paper); color: var(--ink); min-height: 100vh; font-size: 14px; }

/* ── SCREENS ── */
.screen        { display: none; }
.screen.active { display: flex; min-height: 100vh; }

/* ── SIGN IN screen (shown at /app when session expired) ── */
#s-login {
  background: var(--paper);
  align-items: center;
  justify-content: center;
}
.signin-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px;
  width: 100%;
  max-width: 380px;
  text-align: center;
}
.signin-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: 28px;
}
.signin-logo-text {
  font-family: 'Fraunces', serif;
  font-size: 20px;
  font-weight: 400;
  color: var(--ink);
}
.signin-logo-text em { color: var(--teal); font-style: italic; }
.signin-head { font-size: 20px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.signin-sub  { font-size: 13px; color: var(--ink3); margin-bottom: 24px; line-height: 1.5; }
.signin-back { display: block; margin-top: 16px; font-size: 12px; color: var(--ink3); text-decoration: none; }
.signin-back:hover { color: var(--teal); }

/* ── ONBOARDING ── */
#s-onboard { flex-direction: column; align-items: center; justify-content: center; padding: 2rem; background: var(--paper); }
.onboard-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--rl); padding: 2.5rem;
  max-width: 480px; width: 100%;
  box-shadow: 0 2px 24px rgba(18,16,14,0.07);
  max-height: 92vh; overflow-y: auto;
}
.ob-step { font-size: 11px; font-weight: 600; color: var(--teal); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 8px; }
.onboard-box h2 { font-family: 'Fraunces', serif; font-size: 24px; font-weight: 300; margin-bottom: 6px; }
.onboard-box p  { font-size: 13px; color: var(--ink2); margin-bottom: 1.5rem; line-height: 1.6; }
.field       { margin-bottom: 1rem; }
.field label { display: block; font-size: 12px; font-weight: 500; color: var(--ink2); margin-bottom: 5px; letter-spacing: 0.03em; }

input[type=text], input[type=email] {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border2);
  border-radius: var(--r); font-family: 'Sora', sans-serif;
  font-size: 13px; color: var(--ink); background: var(--surface); outline: none;
  transition: border-color 0.15s;
}
input[type=text]:focus, input[type=email]:focus { border-color: var(--teal); }

.board-row   { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.board-btn   { padding: 9px; border-radius: var(--r); border: 1px solid var(--border); background: var(--surface); font-family: 'Sora', sans-serif; font-size: 12px; font-weight: 500; color: var(--ink2); cursor: pointer; text-align: center; transition: all 0.15s; }
.board-btn:hover { border-color: var(--teal); }
.board-btn.sel   { border-color: var(--teal); background: var(--teal-l); color: var(--teal); }
.class-grid  { display: grid; grid-template-columns: repeat(5,1fr); gap: 6px; }
.class-btn   { padding: 10px 6px; border-radius: var(--r); border: 1px solid var(--border); background: var(--surface); font-family: 'Sora', sans-serif; font-size: 13px; font-weight: 500; color: var(--ink2); cursor: pointer; text-align: center; transition: all 0.15s; }
.class-btn:hover { border-color: var(--teal); color: var(--teal); }
.class-btn.sel   { border-color: var(--teal); background: var(--teal-l); color: var(--teal); font-weight: 600; }
.subj-row    { display: flex; gap: 8px; }
.subj-btn    { flex: 1; padding: 12px 8px; border-radius: var(--r); border: 1.5px solid var(--border); background: var(--surface); font-family: 'Sora', sans-serif; font-size: 13px; font-weight: 500; color: var(--ink2); cursor: pointer; text-align: center; transition: all 0.15s; }
.subj-btn:hover { border-color: var(--teal); }
.subj-btn.sel   { border-color: var(--teal); background: var(--teal-l); color: var(--teal); font-weight: 600; }
.si          { font-size: 20px; display: block; margin-bottom: 4px; }
.action-btn  { width: 100%; padding: 12px; border-radius: var(--r); border: none; background: var(--teal); color: #fff; font-family: 'Sora', sans-serif; font-size: 14px; font-weight: 500; cursor: pointer; margin-top: 1rem; transition: all 0.15s; }
.action-btn:hover  { background: var(--teal-d); }
.action-btn:active { transform: scale(0.98); }

/* ── TOPBAR ── */
#s-app      { flex-direction: column; }
.topbar     { background: var(--surface); border-bottom: 1px solid var(--border); height: 54px; display: flex; align-items: center; justify-content: space-between; padding: 0 1.5rem; position: sticky; top: 0; z-index: 100; flex-shrink: 0; }
.topbar-left  { display: flex; align-items: center; gap: 14px; }
.tb-logo    { font-family: 'Fraunces', serif; font-size: 18px; color: var(--teal); font-weight: 300; font-style: italic; }
.tb-school  { font-size: 12px; color: var(--ink2); padding: 4px 10px; background: var(--surface2); border-radius: 20px; border: 1px solid var(--border); }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.user-chip  { display: flex; align-items: center; gap: 8px; padding: 4px 12px 4px 4px; border-radius: 20px; border: 1px solid var(--border); background: var(--surface2); }
.user-av    { width: 26px; height: 26px; border-radius: 50%; background: var(--teal-l); border: 1px solid var(--teal-b); display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 600; color: var(--teal); }
.user-name  { font-size: 12px; font-weight: 500; color: var(--ink); }
.tb-btn     { padding: 5px 12px; border-radius: 20px; border: 1px solid var(--border); background: transparent; font-family: 'Sora', sans-serif; font-size: 12px; color: var(--ink2); cursor: pointer; transition: background 0.15s; }
.tb-btn:hover { background: var(--surface2); }

/* ── LAYOUT ── */
.app-body   { display: grid; grid-template-columns: 268px 1fr; flex: 1; min-height: calc(100vh - 54px); }

/* ── SIDEBAR ── */
.sidebar    { background: var(--surface); border-right: 1px solid var(--border); padding: 1.25rem; display: flex; flex-direction: column; gap: 1rem; overflow-y: auto; height: 100%; box-sizing: border-box; }
.sb-label   { font-size: 10px; font-weight: 600; color: var(--ink3); letter-spacing: 0.07em; text-transform: uppercase; margin-bottom: 8px; }
.subj-tabs  { display: flex; flex-direction: column; gap: 4px; }
.subj-tab   { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: var(--r); border: 1px solid transparent; cursor: pointer; font-size: 13px; font-weight: 500; color: var(--ink2); transition: all 0.15s; }
.subj-tab:hover  { background: var(--surface2); }
.subj-tab.active { background: var(--teal-l); color: var(--teal); border-color: var(--teal-b); }
.subj-tab .si    { font-size: 15px; }
.topic-list { display: flex; flex-direction: column; gap: 4px; }
.topic-item { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: var(--r); border: 1px solid var(--border); cursor: pointer; font-size: 12px; color: var(--ink); transition: all 0.15s; background: var(--surface); }
.topic-item:hover { border-color: var(--teal); background: var(--teal-l); }
.topic-item.sel   { border-color: var(--teal); background: var(--teal-l); color: var(--teal); font-weight: 500; }
.ti-dot     { width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex-shrink: 0; }
.gen-btn    { width: 100%; padding: 10px; border-radius: var(--r); border: none; background: var(--teal); color: #fff; font-family: 'Sora', sans-serif; font-size: 13px; font-weight: 500; cursor: pointer; transition: all 0.15s; margin-top: 4px; }
.gen-btn:hover    { background: var(--teal-d); }
.gen-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.divider    { height: 1px; background: var(--border); margin: 4px 0; }

/* ── DOWNLOAD BUTTONS ── */
.dl-buttons { display: flex; flex-direction: column; gap: 5px; }
.dl-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: var(--r);
  border: 1px solid var(--border); background: var(--surface);
  font-family: 'Sora', sans-serif; font-size: 12px; font-weight: 500;
  color: var(--ink2); cursor: pointer; transition: all 0.15s; text-align: left;
}
.dl-btn:hover    { border-color: var(--teal); background: var(--teal-l); color: var(--teal); }
.dl-btn.dl-full  { border-color: var(--teal-b); color: var(--teal); }
.dl-btn.dl-full:hover { background: var(--teal-l); }
.dl-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.dl-icon    { font-size: 14px; }

/* ── PROGRESS ── */
.prog-box   { background: var(--surface2); border-radius: var(--r); padding: 12px; border: 1px solid var(--border); }
.prog-row   { display: flex; justify-content: space-between; font-size: 12px; color: var(--ink2); margin-bottom: 6px; }
.prog-val   { font-weight: 500; color: var(--ink); }
.prog-track { height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.prog-fill  { height: 100%; background: var(--teal); border-radius: 2px; transition: width 0.4s; }
.prog-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 8px; }
.ps         { text-align: center; padding: 8px; background: var(--surface); border-radius: 8px; border: 1px solid var(--border); }
.ps-v       { font-size: 18px; font-weight: 500; color: var(--ink); }
.ps-l       { font-size: 10px; color: var(--ink3); margin-top: 2px; }

/* ── MAIN ── */
.main         { padding: 1.5rem; overflow-y: auto; display: flex; flex-direction: column; gap: 1rem; }
.agent-bar    { display: flex; align-items: center; gap: 8px; padding: 9px 14px; background: var(--surface2); border-radius: var(--r); border: 1px solid var(--border); font-size: 12px; color: var(--ink2); }
.a-dot        { width: 7px; height: 7px; border-radius: 50%; background: #22c55e; flex-shrink: 0; }
.a-dot.on     { background: #f59e0b; animation: pulse 1s infinite; }
@keyframes pulse { 0%,100%{opacity:1}50%{opacity:0.2} }
.sec-nav-wrap { }
.sec-nav      { display: inline-flex; gap: 4px; padding: 4px; background: var(--surface2); border-radius: var(--r); }
.st           { padding: 7px 14px; border-radius: 8px; border: none; background: transparent; font-family: 'Sora', sans-serif; font-size: 12px; font-weight: 500; color: var(--ink2); cursor: pointer; transition: all 0.15s; }
.st.active    { background: var(--surface); color: var(--ink); box-shadow: 0 1px 4px rgba(18,16,14,0.08); }

/* ── CARDS ── */
.card        { background: var(--surface); border: 1px solid var(--border); border-radius: var(--rl); padding: 1.25rem 1.5rem; margin-bottom: .75rem; }
.card-head   { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.card-title  { font-family: 'Fraunces', serif; font-size: 16px; font-weight: 300; }
.card-body   { font-size: 13px; color: var(--ink2); line-height: 1.7; }
.badge       { display: inline-flex; padding: 3px 9px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.b-teal      { background: var(--teal-l); color: var(--teal); border: 1px solid var(--teal-b); }
.b-amber     { background: var(--amber-l); color: var(--amber); }
.b-green     { background: var(--green-l); color: var(--green); border: 1px solid var(--green-b); }
.b-red       { background: var(--red-l); color: var(--red); border: 1px solid var(--red-b); }
.obj         { display: flex; gap: 8px; font-size: 12px; color: var(--ink2); margin-top: 5px; line-height: 1.5; }
.obj-ok      { color: var(--teal); }
.mat-row     { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.info-pill   { display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px; border-radius: 20px; background: var(--teal-l); border: 1px solid var(--teal-b); font-size: 11px; color: var(--teal); margin-bottom: 10px; }

/* ── EXAMPLES ── */
.ex-block    { background: var(--surface2); border-radius: var(--r); padding: 1rem; margin-bottom: .75rem; border: 1px solid var(--border); }
.ex-label    { font-size: 10px; font-weight: 600; color: var(--ink3); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }
.ex-q        { font-size: 13px; font-weight: 500; color: var(--ink); margin-bottom: 10px; line-height: 1.5; }
.step        { display: flex; gap: 10px; margin-bottom: 7px; align-items: flex-start; }
.sn          { width: 22px; height: 22px; border-radius: 50%; background: var(--teal); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 10px; font-weight: 600; flex-shrink: 0; margin-top: 1px; }
.st-text     { font-size: 12px; color: var(--ink); line-height: 1.6; }
.ans-reveal  { margin-top: 10px; padding: 8px 12px; background: var(--green-l); border-radius: 8px; font-size: 12px; color: var(--green); font-weight: 500; border: 1px solid var(--green-b); }

/* ── EXERCISES ── */
.exq-card    { border: 1px solid var(--border); border-radius: var(--r); padding: 1rem; margin-bottom: .75rem; background: var(--surface); }
.exq-meta    { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.exq-label   { font-size: 10px; font-weight: 600; color: var(--ink3); text-transform: uppercase; letter-spacing: .06em; }
.exq-q       { font-size: 13px; color: var(--ink); line-height: 1.6; margin-bottom: 10px; }
textarea     { width: 100%; padding: 8px 12px; border-radius: var(--r); border: 1px solid var(--border2); background: var(--surface); font-family: 'Sora', sans-serif; font-size: 12px; color: var(--ink); resize: vertical; min-height: 60px; outline: none; transition: border-color 0.15s; }
textarea:focus { border-color: var(--teal); }
.eval-box    { margin-top: 8px; padding: 9px 12px; border-radius: 8px; font-size: 12px; line-height: 1.6; }
.ev-good     { background: var(--green-l); color: var(--green); border: 1px solid var(--green-b); }
.ev-ok       { background: var(--amber-l); color: var(--amber); }
.ev-poor     { background: var(--red-l); color: var(--red); border: 1px solid var(--red-b); }
.row-btns    { display: flex; gap: 8px; margin-top: 8px; }

/* ── BUTTONS ── */
.rbtn        { padding: 7px 14px; border-radius: 8px; border: 1px solid var(--border2); background: transparent; font-family: 'Sora', sans-serif; font-size: 12px; font-weight: 500; color: var(--ink); cursor: pointer; transition: all 0.15s; }
.rbtn:hover  { background: var(--surface2); }
.rbtn.primary { background: var(--teal); color: #fff; border-color: transparent; }
.rbtn.primary:hover { background: var(--teal-d); }

/* ── RESULTS ── */
.res-hero    { text-align: center; padding: 2rem; background: var(--surface2); border-radius: var(--rl); border: 1px solid var(--border); margin-bottom: 1rem; }
.res-grade   { font-family: 'Fraunces', serif; font-size: 64px; font-weight: 300; color: var(--teal); line-height: 1; }
.res-pct     { font-size: 15px; color: var(--ink2); margin-top: 4px; }
.res-msg     { font-size: 12px; color: var(--ink3); margin-top: 6px; font-style: italic; }
.res-grid    { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-bottom: 1rem; }
.rs          { background: var(--surface2); border-radius: var(--r); padding: 12px; text-align: center; border: 1px solid var(--border); }
.rs-v        { font-family: 'Fraunces', serif; font-size: 24px; font-weight: 300; color: var(--ink); }
.rs-l        { font-size: 11px; color: var(--ink3); margin-top: 2px; }

/* ── PASTE AREA ── */
.paste-area  { margin-top: 1rem; padding: 1rem; background: var(--surface2); border-radius: var(--r); border: 1px solid var(--border); }
.paste-area p { font-size: 12px; color: var(--ink2); margin-bottom: 8px; line-height: 1.5; }
.loading-state { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 2.5rem; gap: 12px; }
.spinner     { width: 24px; height: 24px; border: 2px solid var(--border2); border-top-color: var(--teal); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── EMPTY ── */
.empty       { text-align: center; padding: 3rem 1rem; font-size: 13px; color: var(--ink3); line-height: 1.8; font-style: italic; }

/* ── TOAST ── */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  padding: 10px 18px; border-radius: var(--r);
  background: var(--ink); color: #fff; font-size: 13px;
  opacity: 0; transform: translateY(10px);
  transition: all 0.25s; pointer-events: none; z-index: 999;
  box-shadow: 0 4px 20px rgba(18,16,14,0.25);
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.success { background: var(--teal); }
.toast.error   { background: var(--red); }

/* ── p-tasks loading dots ── */
.p-tasks { display:flex;flex-direction:column;gap:7px; }
.p-task  { display:flex;align-items:center;gap:9px;font-size:12px;color:var(--ink2); }
.p-dot   { width:7px;height:7px;border-radius:50%;background:var(--border2);flex-shrink:0;transition:background .3s; }
.p-dot.run  { background:#f59e0b;animation:pulse 1s infinite; }
.p-dot.done { background:var(--teal);animation:none; }

/* ── Sticky top rows (tabs + controls) ── */
.main-sticky-header {
  background: var(--surface);
  padding: 1rem 1.5rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border);
}

/* ── Scrollable content area below sticky header ── */
.main-content-scroll {
  padding: 0;
}

/* ── Scrollable topic list in sidebar ── */
.topic-list-wrap {
  flex: 1;
  overflow-y: auto;
  min-height: 80px;
  max-height: 340px;
  margin: 0 -4px;
  padding: 0 4px;
}

/* ── Mobile-only elements — hidden on desktop ── */
#mob-action-bar,
.mobile-nav,
.mobile-drawer-overlay,
.mobile-drawer {
    display: none;
}


/* ── Desktop layout: fixed viewport, sticky header, scrollable content ── */
@media (min-width: 768px) {
  #s-app {
    height: 100vh;
    overflow: hidden;
  }

  .app-body {
    min-height: 0;
    overflow: hidden;
  }

  .main {
    padding: 0;
    height: 100%;
    overflow: hidden;
    min-height: 0;
    gap: 0;
  }

  .main-sticky-header {
    flex-shrink: 0;
    position: relative;
    z-index: 10;
  }

  .main-content-scroll {
    flex: 1 1 0;
    overflow-y: auto;
    min-height: 0;
    padding: 1.25rem 1.5rem;
  }

  .sidebar {
    height: 100%;
    overflow-y: auto;
    box-sizing: border-box;
  }
}

/* ── Onboarding subject chips ── */
.subj-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border-radius: 20px;
  border: 1.5px solid var(--border);
  background: var(--surface2);
  color: var(--ink2);
  font-size: 12px;
  transition: all 0.15s;
}
.subj-chip.sel {
  border-color: var(--teal);
  background: var(--teal-bg, #e8f8f5);
  color: var(--teal-d, #0e7c6b);
  font-weight: 500;
}
.subj-chip.core.sel {
  border-color: var(--teal);
  background: var(--teal-bg, #e8f8f5);
}
.subj-chip:hover:not(.core) {
  border-color: var(--teal);
  background: var(--surface);
}

/* ── Subject picker (landing grid) ── */
.subj-picker-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 8px;
}

.subj-picker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.subj-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px 16px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--r);
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
  text-align: center;
}
.subj-card:hover {
  border-color: var(--teal);
  background: var(--teal-l, #f0faf8);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.subj-card-icon  { font-size: 32px; line-height: 1; }
.subj-card-label { font-size: 13px; font-weight: 600; color: var(--ink1); }
.subj-card-arrow {
  position: absolute;
  bottom: 8px;
  right: 10px;
  font-size: 12px;
  color: var(--ink3);
  opacity: 0;
  transition: opacity 0.15s;
}
.subj-card:hover .subj-card-arrow { opacity: 1; }

/* ── Subject switcher strip ── */
.switcher-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink2);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.12s;
  white-space: nowrap;
}
.switcher-btn:hover  { border-color: var(--teal); color: var(--teal); }
.switcher-btn.active {
  border-color: var(--teal);
  background: var(--teal-l, #f0faf8);
  color: var(--teal);
  font-weight: 600;
}
.switcher-label { display: inline; }

@media (max-width: 600px) {
  .subj-picker-grid { grid-template-columns: repeat(2, 1fr); }
  .switcher-label   { display: none; }
}

/* ── Profile modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-box {
  background: var(--surface);
  border-radius: calc(var(--r) * 2);
  width: 100%;
  max-width: 460px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 1.5rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-header h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink1);
  margin: 0;
}
.modal-close {
  background: none;
  border: none;
  font-size: 18px;
  color: var(--ink3);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  line-height: 1;
}
.modal-close:hover { background: var(--surface2); color: var(--ink1); }
.modal-body {
  padding: 1.25rem 1.5rem;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  flex-shrink: 0;
  gap: 8px;
}
.pf-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.pf-field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink2);
}
.pf-field input {
  width: 100%;
  box-sizing: border-box;
}
.pf-hint {
  font-size: 11px;
  color: var(--ink3);
}
.pf-class-btn {
  padding: 5px 10px;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--surface2);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  color: var(--ink2);
  transition: all 0.12s;
}
.pf-class-btn.sel, .pf-class-btn:hover {
  border-color: var(--teal);
  background: var(--teal-l, #f0faf8);
  color: var(--teal);
}

/* ── Invite / share buttons ── */
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--r);
  border: 1.5px solid var(--border);
  background: var(--surface2);
  color: var(--ink1);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.share-btn:hover         { transform: translateY(-1px);
                           box-shadow: 0 3px 8px rgba(0,0,0,0.1); }
.share-btn.whatsapp:hover { border-color: #25D366; color: #128C7E; }
.share-btn.sms:hover      { border-color: #007AFF; color: #007AFF; }
.share-btn.email:hover    { border-color: var(--teal); color: var(--teal); }

/* ── Login screen styles ── */
.login-hero { text-align: center; margin: 1.5rem 0 2rem; }
.login-hero-icon { font-size: 48px; margin-bottom: 12px; }
.login-hero h2 { font-size: 22px; font-weight: 700; color: var(--ink1); margin: 0 0 8px; }
.login-hero p { font-size: 14px; color: var(--ink3); line-height: 1.6; margin: 0; }
.login-logo { font-size: 26px; font-weight: 800; color: var(--teal); letter-spacing: -0.5px; text-align: center; margin-bottom: 4px; }
.login-tagline { font-size: 12px; color: var(--ink3); text-align: center; margin-bottom: 0; }
.login-note { font-size: 11px; color: var(--ink3); text-align: center; margin-top: 16px; line-height: 1.5; }

/* ── Mobile layout (< 768px) ─────────────────────────────────────────── */
@media (max-width: 767px) {

  /* ── Prevent all horizontal scroll ── */
  html, body {
    overflow-x: hidden;
    max-width: 100vw;
  }

  /* ── Hide desktop sidebar entirely on mobile ── */
  .sidebar { display: none !important; }

  /* ── Hide desktop tab row and controls row ── */
  #tab-row       { display: none !important; }
  #controls-row  { display: none !important; }
  #subj-switcher { display: none !important; }

  /* ── App body — full height, no flex row, no overflow ── */
  /* topbar is ~90px on mobile (two rows) */
  .app-body {
    flex-direction: column;
    height: calc(100vh - 90px);
    overflow: hidden;
    max-width: 100vw;
  }

  /* ── Main area — full width, full height ── */
  .main {
    width: 100%;
    max-width: 100vw;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  /* ── Sticky header — hidden on mobile (tabs/controls hidden) ── */
  .main-sticky-header {
    display: none;
  }

  /* Subject switcher strip — also hidden on mobile */
  #subj-switcher {
    display: none !important;
  }

  /* Subject chip in topbar — mobile only */
  .tb-subject-chip {
    display: inline-flex !important;
    align-items: center;
    gap: 5px;
    background: var(--teal-l);
    border: 1px solid var(--teal-b);
    border-radius: 20px;
    padding: 3px 10px 3px 7px;
    font-size: 12px;
    font-weight: 600;
    color: var(--teal-d);
    cursor: pointer;
    margin-left: 8px;
    white-space: nowrap;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .tb-school { display: none; }

  /* ── Content — full page vertical scroll, no horizontal ── */
  .main-content-scroll {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    padding: 6px 8px 140px;
    max-width: 100vw;
    box-sizing: border-box;
    scrollbar-width: none;        /* Firefox */
    -ms-overflow-style: none;     /* IE/Edge */
  }

  /* ── Topbar — two rows on mobile ── */
  .topbar {
    padding: 0;
    min-height: auto;
    flex-shrink: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    height: auto;
  }
  /* Row 1 wrapper — logo + right items all in one flex row */
  .topbar-left {
    display: flex;
    align-items: center;
    padding: 6px 4px 6px 12px;
    gap: 0;
    min-width: 80px;
    flex-shrink: 0;
  }
  .topbar-right {
    display: flex;
    align-items: center;
    padding: 6px 12px 6px 8px;
    gap: 6px;
    flex: 1;
    justify-content: flex-end;
    overflow: hidden;
  }
  /* topbar-left and topbar-right sit in the same row because topbar is column
     but we need them in the same row — use a wrapper row via flex-wrap */
  .topbar {
    flex-wrap: wrap;
    flex-direction: row;
  }
  .topbar-row2 {
    width: 100%;
    order: 2;
  }
  .tb-logo   { font-size: 15px; font-weight: 700; flex-shrink: 0; display: block !important; color: var(--teal); }
  .tb-school { display: none; }
  .user-name { display: none; }
  .user-chip { gap: 4px; cursor: pointer; }
  .user-av   {
    width: 30px; height: 30px;
    font-size: 11px;
    font-weight: 600;
    color: var(--teal);
    background: var(--teal-l);
    border: 1px solid var(--teal-b);
    flex-shrink: 0;
    display: flex !important;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    overflow: hidden;
  }
  .user-av img {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: block;
    object-fit: cover;
  }
  .credit-pill  { padding: 3px 7px 3px 5px; gap: 4px; flex-shrink: 0; }
  .credit-tier  { font-size: 9px; padding: 1px 5px; }
  .credit-count { font-size: 11px; }
  #upgrade-btn  { padding: 4px 10px; font-size: 11px; flex-shrink: 0; }
  /* Hide Profile, Sign out on mobile — in More drawer */
  .tb-btn { display: none; }
  #upgrade-btn                          { display: inline-block !important; }
  button.tb-btn[onclick*="openInvite"]  { display: inline-block !important; padding: 4px 8px; font-size: 11px; }

  /* Row 2: Subject chip full width */
  .topbar-row2 {
    display: flex;
    align-items: center;
    padding: 4px 12px;
    border-top: 1px solid var(--border);
  }
  .tb-subject-chip-row2 {
    display: flex !important;
    align-items: center;
    gap: 6px;
    width: 100%;
    background: var(--teal-l);
    border: 1px solid var(--teal-b);
    border-radius: 20px;
    padding: 4px 12px 4px 10px;
    font-size: 12px;
    font-weight: 600;
    color: var(--teal-d);
    cursor: pointer;
    text-align: left;
    box-sizing: border-box;
  }
  .tb-subject-chip-row2 .chip-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

  /* ── Mobile bottom nav bar ── */
  .mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: stretch;
    z-index: 200;
    padding-bottom: env(safe-area-inset-bottom);
  }

  .mobile-nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 10px;
    color: var(--ink3);
    padding: 6px 1px;
    transition: color 0.15s;
    -webkit-tap-highlight-color: transparent;
    min-width: 0;
  }
  .mobile-nav-btn .mn-icon {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  .mobile-nav-btn .mn-icon svg {
    width: 22px;
    height: 22px;
    display: block;
  }
  .mobile-nav-btn.active          { color: var(--teal); }
  .mobile-nav-btn.active .mn-icon { transform: scale(1.15); }

  /* ── Mobile topic drawer ── */
  .mobile-drawer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 300;
  }
  .mobile-drawer-overlay.open { display: block; }

  .mobile-drawer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--surface);
    border-radius: 16px 16px 0 0;
    padding: 0 0 env(safe-area-inset-bottom);
    z-index: 301;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
  }
  .mobile-drawer.open { transform: translateY(0); }

  .mobile-drawer-handle {
    width: 36px;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin: 12px auto 8px;
    flex-shrink: 0;
  }

  .mobile-drawer-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink1);
    padding: 4px 16px 12px;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border);
  }

  .mobile-drawer-body {
    overflow-y: auto;
    padding: 12px 16px 16px;
    flex: 1;
  }

  /* Topic list in drawer — vertical stacked */
  .mobile-drawer-body .topic-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .mobile-drawer-body .topic-btn {
    width: 100%;
    text-align: left;
    padding: 10px 14px;
    font-size: 14px;
    border-radius: 8px;
    white-space: normal;
  }

  /* Mobile sliders inside drawer */
  .mobile-slider-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-top: 1px solid var(--border);
    margin-top: 8px;
  }
  .mobile-slider-row label {
    font-size: 12px;
    color: var(--ink3);
    white-space: nowrap;
    min-width: 70px;
  }
  .mobile-slider-row input { flex: 1; }
  .mobile-slider-row span  {
    font-size: 12px;
    font-weight: 600;
    color: var(--ink1);
    min-width: 20px;
    text-align: right;
  }

  /* Mobile action bar sliders */
  .mob-action-sliders {
    display: flex;
    gap: 8px;
    flex-direction: column;
    margin-bottom: 4px;
  }
  .mob-action-sliders .mobile-slider-row {
    padding: 4px 0 !important;
    margin: 0 !important;
    border: none !important;
  }

  /* Drawer footer — sticky at bottom, always visible */
  .mobile-drawer-footer {
    padding: 12px 16px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    background: var(--surface);
  }

  /* Generate button in drawer footer */
  .mobile-generate-btn {
    width: 100%;
    padding: 14px;
    background: var(--teal);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
  }
  .mobile-generate-btn:active { opacity: 0.85; }

  /* Subject picker — 2 col grid, full scroll */
  .subj-picker-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .subj-picker-header { flex-direction: column; gap: 4px; }
  .subj-card { padding: 16px 10px; }
  .subj-card-icon  { font-size: 28px; }
  .subj-card-label { font-size: 12px; }

  /* Concepts grid — single column */
  .concepts-grid { grid-template-columns: 1fr; }

/* Nav */
.lp-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  background: #FAFAF8;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.lp-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Fraunces', serif;
  font-size: 20px;
  font-weight: 500;
  color: var(--teal);
}
.lp-logo-mark { width: 32px; height: 32px; flex-shrink: 0; }
.lp-logo-light { color: white; }
.lp-logo-light .lp-logo-mark rect { fill: rgba(255,255,255,0.15); }
.lp-nav-cta {
  font-size: 13px;
  font-weight: 600;
  color: var(--teal);
  border: 1.5px solid var(--teal);
  padding: 7px 18px;
  border-radius: 20px;
  text-decoration: none;
  transition: all 0.15s;
}
.lp-nav-cta:hover { background: var(--teal); color: white; }

/* Hero */
.lp-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 72px 40px;
}
.lp-eyebrow {
  font-size: 11px;
  font-weight: 700;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}
.lp-headline {
  font-family: 'Fraunces', serif;
  font-size: 52px;
  font-weight: 300;
  color: #111;
  line-height: 1.12;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.lp-headline em {
  font-style: italic;
  color: var(--teal);
}
.lp-subhead {
  font-size: 16px;
  color: #555;
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}
.lp-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: #111;
  color: white;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.15s;
  border: 2px solid #111;
}
.lp-cta-btn:hover { background: #333; border-color: #333; }
.lp-cta-btn-light {
  background: white;
  color: #111;
  border-color: white;
}
.lp-cta-btn-light:hover { background: #f0f0f0; border-color: #f0f0f0; }
.lp-auth-note {
  font-size: 11px;
  color: #999;
  margin-top: 12px;
}

/* Mockup */
.lp-hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.lp-mockup {
  background: white;
  border: 1px solid #E5E7EB;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 380px;
}
.lp-mockup-bar {
  background: #F3F4F6;
  padding: 10px 14px;
  display: flex;
  gap: 6px;
  align-items: center;
  border-bottom: 1px solid #E5E7EB;
}
.lp-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #D1D5DB;
}
.lp-dot:first-child { background: #FCA5A5; }
.lp-dot:nth-child(2) { background: #FCD34D; }
.lp-dot:nth-child(3) { background: #6EE7B7; }
.lp-mockup-body { padding: 20px; }
.lp-mock-chip {
  display: inline-block;
  background: var(--teal-l);
  color: var(--teal-d);
  font-size: 10px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
  margin-bottom: 10px;
  letter-spacing: 0.03em;
}
.lp-mock-heading {
  font-size: 16px;
  font-weight: 700;
  color: #111;
  margin-bottom: 2px;
}
.lp-mock-sub {
  font-size: 11px;
  color: #999;
  margin-bottom: 14px;
}
.lp-mock-card {
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 8px;
  border: 1px solid transparent;
}
.lp-mc-label { font-size: 12px; font-weight: 600; margin-bottom: 3px; }
.lp-mc-action { font-size: 11px; opacity: 0.75; }
.lp-mc-teal  { background: #E8FDF8; border-color: #B2EFE0; color: #065F46; }
.lp-mc-amber { background: #FFFBEB; border-color: #FDE68A; color: #92400E; }
.lp-mc-green { background: #F0FDF4; border-color: #BBF7D0; color: #14532D; }

/* Features */
.lp-features {
  background: white;
  border-top: 1px solid #E5E7EB;
  border-bottom: 1px solid #E5E7EB;
  padding: 72px 40px;
}
.lp-features-inner { max-width: 1100px; margin: 0 auto; }
.lp-section-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.lp-section-head {
  font-family: 'Fraunces', serif;
  font-size: 36px;
  font-weight: 300;
  color: #111;
  margin-bottom: 40px;
  letter-spacing: -0.5px;
}
.lp-feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.lp-feat-wide { grid-column: span 3; display: flex; gap: 20px; align-items: flex-start; }
.lp-feat-card {
  background: #FAFAF8;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  padding: 24px;
  transition: all 0.2s;
}
.lp-feat-card:hover { border-color: var(--teal-b); box-shadow: 0 4px 20px rgba(13,148,136,0.08); }
.lp-feat-accent { background: var(--teal-l); border-color: var(--teal-b); }
.lp-feat-icon { font-size: 28px; margin-bottom: 14px; flex-shrink: 0; }
.lp-feat-title { font-size: 15px; font-weight: 700; color: #111; margin-bottom: 8px; }
.lp-feat-desc { font-size: 13px; color: #555; line-height: 1.7; }
.lp-coming {
  display: inline-block;
  background: var(--teal);
  color: white;
  font-size: 9px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  vertical-align: middle;
  margin-left: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Bottom CTA */
.lp-bottom-cta {
  background: var(--teal);
  padding: 72px 40px;
  text-align: center;
}
.lp-bottom-cta-inner { max-width: 560px; margin: 0 auto; }
.lp-bottom-head {
  font-family: 'Fraunces', serif;
  font-size: 36px;
  font-weight: 300;
  color: white;
  margin: 16px 0 10px;
  letter-spacing: -0.5px;
}
.lp-bottom-sub { font-size: 14px; color: rgba(255,255,255,0.75); margin-bottom: 28px; }

/* Mobile landing */
@media (max-width: 767px) {
  .lp-nav { padding: 12px 20px; }
  .lp-nav-cta { display: none; }
  .lp-hero {
    grid-template-columns: 1fr;
    padding: 40px 20px;
    gap: 32px;
  }
  .lp-headline { font-size: 34px; }
  .lp-subhead  { font-size: 14px; }
  .lp-hero-visual { order: -1; }
  .lp-mockup { max-width: 100%; }
  .lp-features { padding: 48px 20px; }
  .lp-feat-grid { grid-template-columns: 1fr; }
  .lp-feat-wide { grid-column: span 1; flex-direction: column; }
  .lp-section-head { font-size: 26px; }
  .lp-bottom-cta { padding: 48px 20px; }
  .lp-bottom-head { font-size: 26px; }
}

.login-box {
    padding: 2rem 1.25rem;
    border-radius: 0;
    min-height: 100vh;
  }
  .gmail-btn { padding: 14px 20px; font-size: 15px; }

  /* Modals — full screen on mobile */
  .modal-box {
    max-height: 100vh;
    border-radius: 0;
    height: 100%;
  }

  /* Onboarding */
  .onboard-box { padding: 1.5rem 1rem; }
}

@media (max-width: 380px) {
  .subj-picker-grid { grid-template-columns: repeat(2, 1fr); }
  .mobile-nav-btn   { font-size: 9px; }
}

/* ── Concepts grid ── */
.concepts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  margin-top: 4px;
}

.concept-card {
  display: flex;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px;
  transition: box-shadow 0.15s;
}
.concept-card:hover { box-shadow: 0 2px 10px rgba(0,0,0,0.07); }
.concept-card.concept-book {
  border-color: var(--teal-b, #b2dfdb);
  background: var(--teal-l, #f0faf8);
}

.concept-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--teal);
  background: var(--teal-l, #e8f5f2);
  border: 1px solid var(--teal-b, #b2dfdb);
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.concept-body  { flex: 1; min-width: 0; }

.concept-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink1);
  margin-bottom: 2px;
  line-height: 1.4;
}

.concept-topic-tag {
  font-size: 10px;
  color: var(--teal);
  font-weight: 600;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.concept-explanation {
  font-size: 13px;
  color: var(--ink2);
  line-height: 1.65;
}

.concept-book-ref {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin-top: 10px;
  padding: 8px 10px;
  background: var(--surface2);
  border-radius: 6px;
  font-size: 12px;
  color: var(--ink2);
  line-height: 1.5;
}
.book-icon { font-size: 14px; flex-shrink: 0; margin-top: 1px; }

/* ── Mobile content — compact fonts and tight spacing ── */
@media (max-width: 767px) {

  /* Base font for all content on mobile */
  .main-content-scroll {
    font-size: 11px;
    padding: 6px 6px 180px;
  }

  /* ── Section head ── */
  .section-head   { margin-bottom: 6px; padding: 0; }
  .sh-title       { font-size: 13px !important; font-weight: 600; }
  .sh-sub         { font-size: 10px !important; margin-top: 1px; }

  /* ── Info pill (board context) ── */
  .info-pill      { font-size: 10px; padding: 4px 8px; margin-bottom: 8px; }

  /* ── Curriculum cards ── */
  .card           { padding: 8px 10px; margin-bottom: 6px; border-radius: 6px; }
  .card-head      { margin-bottom: 4px; gap: 6px; }
  .card-title     { font-size: 12px; font-weight: 600; }
  .card-body      { font-size: 11px; line-height: 1.5; margin-bottom: 5px; }
  .badge          { font-size: 9px; padding: 2px 6px; }
  .obj            { font-size: 10px; padding: 1px 0; gap: 4px; }
  .obj-ok         { font-size: 10px; }
  .mat-row        { gap: 4px; margin-top: 4px; }

  /* ── Examples ── */
  .ex-block       { padding: 8px 10px; margin-bottom: 6px; border-radius: 6px; }
  .ex-label       { font-size: 10px; }
  .ex-q           { font-size: 11px; line-height: 1.5; margin: 5px 0; }
  .step           { gap: 6px; padding: 3px 0; }
  .sn             { font-size: 9px; min-width: 17px; height: 17px; border-radius: 50%;
                    display:flex; align-items:center; justify-content:center;
                    flex-shrink:0; }
  .st-text        { font-size: 11px; line-height: 1.5; }
  .ans-reveal     { font-size: 11px; padding: 5px 8px; margin-top: 5px; }

  /* ── Exercises ── */
  .exq-card       { padding: 8px 10px; margin-bottom: 6px; border-radius: 6px; }
  .exq-meta       { margin-bottom: 5px; gap: 6px; }
  .exq-label      { font-size: 10px; }
  .exq-q          { font-size: 11px; line-height: 1.5; margin-bottom: 5px; }
  .eval-box       { font-size: 10px; padding: 5px 8px; line-height: 1.5; }
  .row-btns       { gap: 5px; margin-top: 4px; }
  .rbtn           { font-size: 11px; padding: 5px 10px; }

  /* ── Results ── */
  .res-hero       { padding: 12px 10px; }
  .res-grade      { font-size: 36px; }
  .res-pct        { font-size: 13px; }
  .res-msg        { font-size: 11px; }
  .res-grid       { gap: 8px; margin: 8px 0; }
  .rs-v           { font-size: 16px; }
  .rs-l           { font-size: 10px; }

  /* ── Concepts ── */
  .concepts-grid  { grid-template-columns: 1fr; gap: 6px; }
  .concept-card   { padding: 8px 10px; gap: 8px; border-radius: 6px; }
  .concept-num    { width: 20px; height: 20px; font-size: 9px; }
  .concept-title  { font-size: 12px; margin-bottom: 1px; }
  .concept-explanation { font-size: 11px; line-height: 1.5; }
  .concept-topic-tag   { font-size: 9px; margin-bottom: 3px; }
  .concept-book-ref    { font-size: 10px; padding: 5px 7px; margin-top: 5px; }
  .book-icon      { font-size: 11px; }

  /* ── Empty states ── */
  .empty          { font-size: 11px; padding: 1.5rem 1rem; }
}

/* ── Dashboard / Today tab ─────────────────────────────────────────────── */

.dash-wrap {
  padding: 4px 0 1rem;
  max-width: 860px;
}

/* Encouragement banner */
.dash-encourage {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--teal-l);
  border: 1px solid var(--teal-b);
  border-radius: var(--r);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--teal-d);
  line-height: 1.6;
  margin-bottom: 14px;
}
.dash-enc-icon { font-size: 18px; flex-shrink: 0; }

/* Meta row */
.dash-meta {
  font-size: 11px;
  color: var(--ink3);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.dash-cached  { color: var(--amber); }
.dash-fresh   { color: var(--teal);  }
.dash-refresh-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 11px;
  color: var(--ink3);
  cursor: pointer;
  padding: 2px 8px;
  margin-left: 4px;
  transition: all 0.15s;
}
.dash-refresh-btn:hover { border-color: var(--teal); color: var(--teal); }

/* Active refresh — shown only when all topics mastered */
.dash-refresh-active {
  background: var(--teal);
  border-color: var(--teal);
  color: white;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--r);
  width: 100%;
  margin-left: 0;
}
.dash-refresh-active:hover { background: var(--teal-d); border-color: var(--teal-d); color: white; }

/* Priority subject chips */
.dash-priority-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.dash-priority-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  max-width: 340px;
}
.dash-health-needs_attention { border-color: #f9a825; background: #fffde7; color: #7a5e00; }
.dash-health-fair             { border-color: var(--teal-b); background: var(--teal-l); color: var(--teal-d); }
.dash-health-good             { border-color: #a5d6a7; background: #e8f5e9; color: #2e7d32; }
.dash-chip-label { font-weight: 600; }
.dash-chip-reason { font-size: 11px; color: inherit; opacity: 0.8; }

/* Subject block */
.dash-subject-block { margin-bottom: 20px; }
.dash-subject-head {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink2);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Topic cards */
.dash-topic-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 12px 14px;
  margin-bottom: 8px;
  transition: box-shadow 0.15s;
}
.dash-topic-card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.07); }

.dash-topic-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}
.dash-topic-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.dash-topic-reason {
  font-size: 12px;
  color: var(--ink3);
  margin-bottom: 10px;
  line-height: 1.5;
}
.dash-topic-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.dash-tough, .dash-qcount {
  font-size: 11px;
  color: var(--ink3);
  background: var(--surface2);
  padding: 2px 8px;
  border-radius: 4px;
}
.dash-start-btn {
  margin-left: auto;
  padding: 6px 18px;
  background: var(--teal);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.dash-start-btn:hover    { background: var(--teal-d); }
.dash-start-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Signal badges */
.dash-sig {
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
}
.sig-mastered   { background: #e8f5e9; color: #2e7d32; }
.sig-fair       { background: var(--teal-l); color: var(--teal-d); }
.sig-easy       { background: #e3f2fd; color: #1565c0; }
.sig-developing { background: #fff8e1; color: #7a5e00; }
.sig-struggling { background: #fce4ec; color: #c62828; }
.sig-gap        { background: var(--surface2); color: var(--ink3); }

/* Empty / loading states */
.dash-empty {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--ink3);
}
.dash-empty-icon  { font-size: 40px; margin-bottom: 12px; }
.dash-empty-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink2);
  margin-bottom: 8px;
  line-height: 1.5;
}
.dash-empty-sub {
  font-size: 13px;
  line-height: 1.7;
  margin-bottom: 16px;
}
.dash-spin {
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--teal);
  border-radius: 50%;
  animation: dash-spin 0.8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes dash-spin { to { transform: rotate(360deg); } }

/* Mobile — tighter dashboard */
@media (max-width: 767px) {
  .dash-topic-name  { font-size: 12px; }
  .dash-topic-reason{ font-size: 11px; }
  .dash-start-btn   { padding: 5px 14px; font-size: 11px; }
  .dash-priority-chip { font-size: 11px; padding: 5px 10px; }
  .dash-encourage   { font-size: 12px; padding: 10px 12px; }
  .dash-chip-reason { display: none; }
}

/* ── Credit pill (topbar) ─────────────────────────────────────────────── */

.credit-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 10px 4px 6px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 12px;
}
.credit-pill:hover { border-color: var(--teal); }

.credit-tier {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 10px;
  letter-spacing: 0.03em;
}
.credit-tier-free  { background: #F1EFE8; color: #444441; }
.credit-tier-spark { background: #E1F5EE; color: #085041; }
.credit-tier-flow  { background: #EEEDFE; color: #3C3489; }
.credit-tier-elite { background: #FAEEDA; color: #633806; }

.credit-count {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink2);
}

/* ── Plans modal ─────────────────────────────────────────────────────── */

.plans-balance-row {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}
.plans-balance-card {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 12px 14px;
  cursor: default;
}
.plans-referral-cta {
  cursor: pointer;
  border-color: var(--teal-b);
  background: var(--teal-l);
}
.plans-referral-cta:hover { border-color: var(--teal); }
.plans-balance-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--ink3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.plans-balance-num {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.2;
}
.plans-balance-sub {
  font-size: 11px;
  color: var(--teal-d);
  margin-top: 2px;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}
.plans-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Referral banner */
.plans-referral-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: linear-gradient(135deg, var(--teal-l) 0%, #e8f5e2 100%);
  border: 1.5px solid var(--teal-b);
  border-radius: var(--r);
  padding: 14px 16px;
  margin-bottom: 16px;
  cursor: pointer;
  transition: all 0.15s;
}
.plans-referral-banner:hover { border-color: var(--teal); box-shadow: 0 2px 8px rgba(13,148,136,0.15); }
.plans-referral-banner-left { display: flex; align-items: flex-start; gap: 12px; }
.plans-referral-banner-icon { font-size: 28px; flex-shrink: 0; }
.plans-referral-banner-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--teal-d);
  margin-bottom: 3px;
}
.plans-referral-banner-sub {
  font-size: 11px;
  color: var(--ink2);
  line-height: 1.5;
}
.plans-referral-banner-cta {
  font-size: 13px;
  font-weight: 700;
  color: var(--teal);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Interest button for Elite coming soon */
.plan-btn-interest {
  background: var(--amber-l);
  color: var(--amber);
  border: 1.5px solid #f9a825;
  font-weight: 600;
}
.plan-btn-interest:hover { background: #fef3c7; border-color: var(--amber); }

.plan-card {
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  background: var(--surface);
}
.plan-card-active  { border-color: var(--teal); background: var(--teal-l); }
.plan-card-popular { border-color: #534AB7; }

.plan-popular-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: #534AB7;
  color: #EEEDFE;
  font-size: 9px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 10px;
  white-space: nowrap;
  letter-spacing: 0.04em;
}

.plan-tier-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 10px;
  align-self: flex-start;
}

.plan-price { line-height: 1.2; }
.plan-price-num  { font-size: 20px; font-weight: 600; color: var(--ink); }
.plan-price-unit { font-size: 11px; color: var(--ink3); }

.plan-features { display: flex; flex-direction: column; gap: 5px; flex: 1; }
.plan-feat {
  font-size: 11px;
  color: var(--ink2);
  display: flex;
  gap: 5px;
  line-height: 1.4;
}
.plan-feat-yes  { color: var(--ink2); }
.plan-feat-no   { color: var(--ink3); opacity: 0.6; }
.plan-feat-part { color: var(--amber); }

.plan-action { margin-top: 4px; }

.plan-btn {
  width: 100%;
  padding: 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.plan-btn-primary {
  background: var(--teal);
  color: white;
  border: none;
}
.plan-btn-primary:hover { background: var(--teal-d); }
.plan-btn-outline {
  background: none;
  color: var(--ink2);
  border: 1px solid var(--border);
}
.plan-btn-outline:hover { border-color: var(--teal); color: var(--teal); }

.plan-current-badge {
  background: var(--teal);
  color: white;
  text-align: center;
  padding: 7px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
}

.plan-short {
  font-size: 11px;
  color: var(--ink3);
  margin-bottom: 5px;
  text-align: center;
}

.plans-note {
  font-size: 11px;
  color: var(--ink3);
  line-height: 1.6;
  padding: 10px 14px;
  border-left: 2px solid var(--border);
}

/* ── Upgrade prompt (inline) ─────────────────────────────────────────── */

.upgrade-prompt {
  text-align: center;
  padding: 3rem 1.5rem;
}
.upgrade-icon  { font-size: 36px; margin-bottom: 12px; }
.upgrade-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}
.upgrade-body {
  font-size: 13px;
  color: var(--ink3);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 380px;
  margin-left: auto;
  margin-right: auto;
}
.upgrade-btn {
  display: inline-block;
  padding: 10px 28px;
  background: var(--teal);
  color: white;
  border: none;
  border-radius: var(--r);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.upgrade-btn:hover { background: var(--teal-d); }

/* ── Mobile: hide credit count, keep tier pill ───────────────────────── */
@media (max-width: 767px) {
  .credit-count { display: none; }
  .credit-pill  { padding: 4px 8px; }
  .plans-grid   { grid-template-columns: 1fr; }
  .plans-balance-row { flex-direction: column; }
}

/* ── Toughness lock hint ─────────────────────────────────────────────── */
.tough-lock-hint {
  display: none;
  font-size: 11px;
  color: var(--amber);
  background: var(--amber-l);
  border: 1px solid #f9a825;
  border-radius: 4px;
  padding: 3px 8px;
  margin-top: 4px;
  cursor: pointer;
  white-space: nowrap;
}
.tough-lock-hint:hover { text-decoration: underline; }

/* Uniform slider style — questions and toughness */
#tough-level,
#ex-count,
#exq-count {
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  outline: none;
  background: var(--border);
  flex: 1;
}
#ex-count, #exq-count {
  background: linear-gradient(to right, var(--teal) 20%, var(--border) 20%);
}
#tough-level::-webkit-slider-thumb,
#ex-count::-webkit-slider-thumb,
#exq-count::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--teal);
  cursor: pointer;
  border: 2px solid white;
  box-shadow: 0 0 0 1px var(--teal-b);
}
#tough-level::-moz-range-thumb,
#ex-count::-moz-range-thumb,
#exq-count::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--teal);
  cursor: pointer;
  border: 2px solid white;
  box-shadow: 0 0 0 1px var(--teal-b);
}

/* ── Quiz (Objective Questions) ──────────────────────────────────────── */

.quiz-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px 16px;
  margin-bottom: 12px;
}
.quiz-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  gap: 8px;
}
.quiz-type-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--surface2);
  color: var(--ink3);
  white-space: nowrap;
}
.quiz-q {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.5;
  margin-bottom: 12px;
}
.quiz-opts {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 4px;
}
.quiz-opt {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 12px;
  border: 1.5px solid var(--border2);
  border-radius: 7px;
  font-size: 13px;
  color: var(--ink);
  background: var(--surface);
  transition: all 0.12s;
  user-select: none;
}
.quiz-opt:hover             { border-color: var(--teal); background: var(--teal-l); }
.quiz-opt-selected          { border-color: var(--teal); background: var(--teal-l); color: var(--teal-d); font-weight: 500; }
.quiz-opt-correct           { border-color: #16a34a; background: #f0fdf4; color: #14532d; font-weight: 600; }
.quiz-opt-wrong             { border-color: #dc2626; background: #fef2f2; color: #7f1d1d; }
.quiz-opt-icon              { font-size: 13px; flex-shrink: 0; margin-top: 1px; }

.quiz-result {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
}
.quiz-result-right { background: #f0fdf4; color: #14532d; border: 1px solid #bbf7d0; }
.quiz-result-wrong { background: #fef2f2; color: #7f1d1d; border: 1px solid #fecaca; }
.quiz-explanation  { display: block; font-weight: 400; margin-top: 4px; opacity: 0.85; }

@media (max-width: 767px) {
  .quiz-q   { font-size: 13px; }
  .quiz-opt { font-size: 12px; padding: 8px 10px; }
}

/* ── Day Progress sidebar ────────────────────────────────────────────── */
.dp-subj-row {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  padding: 6px 0;
  border-top: 1px solid var(--border);
}
.dp-subj-icon { font-size: 14px; flex-shrink: 0; margin-top: 1px; }
.dp-subj-body { flex: 1; min-width: 0; }
.dp-subj-head {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}
.dp-subj-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--ink2);
  flex: 1;
  min-width: 0;
}
.dp-topics {
  font-size: 10px;
  color: var(--ink3);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.dp-badge {
  font-size: 9px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 3px;
  flex-shrink: 0;
}
.dp-badge-ex   { background: var(--teal-l); color: var(--teal-d); }
.dp-badge-quiz { background: #EDE9FE; color: #5B21B6; }
.dp-score {
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
}
.dp-score-good { color: #15803d; }
.dp-score-ok   { color: var(--amber); }
.dp-score-low  { color: var(--red,#dc2626); }

/* ── Global mobile overflow fixes ───────────────────────────────────── */
@media (max-width: 767px) {

  /* All cards and containers — clamp to screen width */
  .card, .exq-card, .quiz-card, .dash-topic-card,
  .concept-card, .eval-box, .result-card,
  .plans-grid, .plans-balance-row,
  .stat-row, .feat-grid {
    max-width: 100%;
    box-sizing: border-box;
  }

  /* Tables — allow horizontal scroll within, not page */
  table {
    max-width: 100%;
    overflow-x: auto;
    display: block;
  }

  /* Textareas — fit screen */
  textarea {
    max-width: 100%;
    box-sizing: border-box;
  }

  /* Quiz options — stack cleanly */
  .main-content-scroll::-webkit-scrollbar { display: none; }  /* Chrome/Safari */
  .quiz-opts { gap: 6px; }
  .quiz-opt  { font-size: 12px; padding: 8px 10px; }

  /* Exercises */
  .exq-card  { padding: 10px 10px; margin-left: 0; margin-right: 0; width: 100%; box-sizing: border-box; }
  .quiz-card { padding: 10px 10px; margin-left: 0; margin-right: 0; width: 100%; box-sizing: border-box; }
  .exq-q     { font-size: 13px; }

  /* Day progress subject rows */
  .dp-subj-row { gap: 5px; }
  .dp-topics   { font-size: 9px; }

  /* Topbar overflow handled by two-row layout above */
  /* credit-pill and upgrade button visible on mobile — shown in compact topbar */

  /* Modal boxes — full width on small screens */
  .modal-box {
    width: 95vw !important;
    max-width: 95vw !important;
    max-height: 85vh;
    overflow-y: auto;
  }

  /* Plans grid — single column */
  .plans-grid, .plans-grid-4 {
    grid-template-columns: 1fr !important;
  }
  .plans-balance-row {
    flex-direction: column;
  }

  /* Dash wrap */
  .dash-wrap { padding: 4px 0 80px; }

  /* Subj picker grid */
  .subj-picker-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

/* ── Share bar ───────────────────────────────────────────────────────── */
.share-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--teal-l);
  border: 1px solid var(--teal-b);
  border-radius: var(--r);
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.share-bar-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--teal-d);
  flex-shrink: 0;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 20px;
  border: none;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.share-wa    { background: #25D366; color: white; }
.share-wa:hover { background: #1da851; }
.share-email { background: #4285F4; color: white; }
.share-email:hover { background: #3367d6; }
.share-copy  { background: var(--surface); color: var(--ink2); border: 1px solid var(--border); }
.share-copy:hover { border-color: var(--teal); color: var(--teal); }

@media (max-width: 767px) {
  .share-bar { padding: 8px 10px; gap: 6px; }
  .share-btn { padding: 5px 10px; font-size: 11px; }
  .share-bar-label { font-size: 11px; }
}

/* ── Submit All bar ──────────────────────────────────────────────────── */
.submit-all-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  background: var(--teal-l);
  border: 1px solid var(--teal-b);
  border-radius: var(--r);
  margin-top: 8px;
  flex-wrap: wrap;
}
.submit-all-info {
  font-size: 12px;
  color: var(--teal-d);
  font-weight: 500;
}
.submit-all-btn {
  flex-shrink: 0;
  padding: 7px 16px;
  font-size: 13px;
}
@media (max-width: 767px) {
  .submit-all-bar { padding: 8px 10px; }
  .submit-all-btn { width: 100%; text-align: center; }
}

/* ── v2 layout additions ── */
/* ── Edu Hives v2 stylesheet ── */

/* ════════════════════════════════════════════════════════════
   DESIGN TOKENS — unchanged from v1
   ════════════════════════════════════════════════════════════ */
:root {
  --teal:        #1a7a6e;
  --teal-d:      #145f55;
  --teal-l:      #e6f4f2;
  --teal-b:      #a8d8d3;
  --amber:       #b06c10;
  --amber-l:     #fef4e6;
  --green:       #1a6e3a;
  --green-l:     #e8f5ee;
  --green-b:     #a8d4b8;
  --red:         #991a1a;
  --red-l:       #fdf0f0;
  --red-b:       #d4a0a0;
  --ink:         #12100e;
  --ink2:        #5a5550;
  --ink3:        #7a7570;
  --paper:       #faf8f4;
  --surface:     #ffffff;
  --surface2:    #f2efe8;
  --border:      #bfb9af;
  --border2:     #a09890;
  --r:           10px;
  --rl:          14px;

  /* v2 layout dims */
  --topbar-h:    52px;
  --sidebar-w:   192px;
  --mid-w:       224px;
}

/* ════════════════════════════════════════════════════════════
   RESET + BASE
   ════════════════════════════════════════════════════════════ */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Sora', sans-serif;
  background: var(--paper);
  color: var(--ink);
  min-height: 100vh;
  font-size: 14px;
}

/* ════════════════════════════════════════════════════════════
   SCREENS — login / onboard / app
   ════════════════════════════════════════════════════════════ */
.screen        { display: none; }
.screen.active { display: flex; min-height: 100vh; }

/* ── Sign-in (unchanged) ── */
#s-login {
  background: var(--paper);
  align-items: center;
  justify-content: center;
}
.signin-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px;
  width: 100%;
  max-width: 380px;
  text-align: center;
}
.signin-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: 28px;
}
.signin-logo-text {
  font-family: 'Fraunces', serif;
  font-size: 20px;
  font-weight: 400;
  color: var(--ink);
}
.signin-logo-text em { color: var(--teal); font-style: italic; }
.signin-head { font-size: 20px; font-weight: 600; margin-bottom: 6px; }
.signin-sub  { font-size: 13px; color: var(--ink3); margin-bottom: 24px; line-height: 1.5; }
.signin-back { display: block; margin-top: 16px; font-size: 12px; color: var(--ink3); text-decoration: none; }
.signin-back:hover { color: var(--teal); }
.login-note  { font-size: 11px; color: var(--ink3); text-align: center; margin-top: 16px; line-height: 1.5; }
.gmail-btn {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 11px 20px; border-radius: var(--r);
  border: 1px solid var(--border2); background: var(--surface);
  font-family: 'Sora', sans-serif; font-size: 13px; font-weight: 500;
  color: var(--ink); cursor: pointer; text-decoration: none;
  transition: all 0.15s; width: 100%;
}
.gmail-btn:hover { background: var(--surface2); border-color: var(--teal-b); }

/* ── Onboarding (unchanged) ── */
#s-onboard {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: var(--paper);
}
.onboard-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--rl); padding: 2.5rem;
  max-width: 480px; width: 100%;
  box-shadow: 0 2px 24px rgba(18,16,14,0.07);
  max-height: 92vh; overflow-y: auto;
}
.ob-step { font-size: 11px; font-weight: 600; color: var(--teal); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 8px; }
.onboard-box h2 { font-family: 'Fraunces', serif; font-size: 24px; font-weight: 300; margin-bottom: 6px; }
.onboard-box p  { font-size: 13px; color: var(--ink2); margin-bottom: 1.5rem; line-height: 1.6; }
.field       { margin-bottom: 1rem; }
.field label { display: block; font-size: 12px; font-weight: 500; color: var(--ink2); margin-bottom: 5px; letter-spacing: 0.03em; }

input[type=text], input[type=email], input[type=tel] {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border2);
  border-radius: var(--r); font-family: 'Sora', sans-serif;
  font-size: 13px; color: var(--ink); background: var(--surface); outline: none;
  transition: border-color 0.15s;
}
input[type=text]:focus, input[type=email]:focus, input[type=tel]:focus { border-color: var(--teal); }

.board-row  { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.board-btn  { padding: 9px; border-radius: var(--r); border: 1px solid var(--border); background: var(--surface); font-family: 'Sora', sans-serif; font-size: 12px; font-weight: 500; color: var(--ink2); cursor: pointer; text-align: center; transition: all 0.15s; }
.board-btn:hover { border-color: var(--teal); }
.board-btn.sel   { border-color: var(--teal); background: var(--teal-l); color: var(--teal); }
.class-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 6px; }
.class-btn  { padding: 10px 6px; border-radius: var(--r); border: 1px solid var(--border); background: var(--surface); font-family: 'Sora', sans-serif; font-size: 13px; font-weight: 500; color: var(--ink2); cursor: pointer; text-align: center; transition: all 0.15s; }
.class-btn:hover { border-color: var(--teal); color: var(--teal); }
.class-btn.sel   { border-color: var(--teal); background: var(--teal-l); color: var(--teal); font-weight: 600; }
.action-btn { width: 100%; padding: 12px; border-radius: var(--r); border: none; background: var(--teal); color: #fff; font-family: 'Sora', sans-serif; font-size: 14px; font-weight: 500; cursor: pointer; margin-top: 1rem; transition: all 0.15s; }
.action-btn:hover  { background: var(--teal-d); }
.action-btn:active { transform: scale(0.98); }
.subj-chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 10px; border-radius: 20px;
  border: 1.5px solid var(--border); background: var(--surface2);
  color: var(--ink2); font-size: 12px; cursor: pointer; transition: all 0.15s;
}
.subj-chip.sel      { border-color: var(--teal); background: var(--teal-l); color: var(--teal); font-weight: 500; }
.subj-chip:hover    { border-color: var(--teal); }

/* ════════════════════════════════════════════════════════════
   APP SCREEN SHELL — v2
   ════════════════════════════════════════════════════════════ */
#s-app {
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}
/* Modals must escape the s-app overflow:hidden stacking context */
.modal-overlay {
  position: fixed !important;
  z-index: 9000 !important;
}

/* ── TOPBAR ── */
.topbar {
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
  position: relative;
  z-index: 100;
}
.tb-logo {
  font-family: 'Fraunces', serif;
  font-size: 17px;
  color: var(--teal);
  font-weight: 300;
  font-style: italic;
  white-space: nowrap;
  flex-shrink: 0;
}
.tb-school {
  font-size: 12px;
  color: var(--ink3);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Usage bar in topbar */
.tb-usage {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.tb-usage-label { font-size: 10px; color: var(--ink3); white-space: nowrap; }
.tb-usage-track {
  width: 72px; height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.tb-usage-fill {
  height: 100%;
  background: var(--teal);
  border-radius: 2px;
  transition: width 0.4s;
}
.tb-usage-count { font-size: 11px; color: var(--ink2); white-space: nowrap; font-weight: 500; }

.tb-btn {
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  font-family: 'Sora', sans-serif;
  font-size: 12px;
  color: var(--ink2);
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
}
.tb-btn:hover       { background: var(--surface2); }
.tb-btn.tb-upgrade  { background: var(--teal); color: #fff; border-color: var(--teal); }
.tb-btn.tb-upgrade:hover { background: var(--teal-d); }

.user-chip {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 12px 4px 4px; border-radius: 20px;
  border: 1px solid var(--border); background: var(--surface2);
  cursor: pointer; flex-shrink: 0;
}
.user-av {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--teal-l); border: 1px solid var(--teal-b);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 600; color: var(--teal);
}
.user-name { font-size: 12px; font-weight: 500; color: var(--ink); }

/* Credit pill — keep for backward compat */
.credit-pill {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 20px;
  border: 1px solid var(--border); background: var(--surface2);
  cursor: pointer; font-size: 11px; flex-shrink: 0;
}
.credit-tier       { font-weight: 600; border-radius: 10px; padding: 1px 6px; }
.credit-tier-free  { color: var(--ink3); }
.credit-tier-spark { color: var(--amber); background: var(--amber-l); }
.credit-tier-flow  { color: var(--teal); background: var(--teal-l); }
.credit-tier-elite { color: #7c3aed; background: #f3f0ff; }
.credit-count      { color: var(--ink2); }

/* ════════════════════════════════════════════════════════════
   THREE-PANEL BODY — desktop
   ════════════════════════════════════════════════════════════ */
.app-body {
  display: grid;
  grid-template-columns: var(--sidebar-w) var(--mid-w) 1fr;
  flex: 1;
  min-height: 0;
  height: calc(100vh - var(--topbar-h));
  overflow: hidden;
}

/* ── LEFT SIDEBAR — nav + subjects + day progress ── */
.sidebar {
  background: var(--surface2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  height: 100%;
}
.sb-nav {
  padding: 10px 8px 4px;
  flex-shrink: 0;
}
.sb-nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: var(--r);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink2);
  cursor: pointer;
  transition: all 0.15s;
  margin-bottom: 1px;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-family: 'Sora', sans-serif;
}
.sb-nav-item:hover  { background: var(--surface); color: var(--ink); }
.sb-nav-item.active { background: var(--surface); color: var(--teal); font-weight: 600; }
.sb-nav-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--teal); flex-shrink: 0;
}
.sb-sep { height: 1px; background: var(--border); margin: 6px 10px; }
.sb-label {
  font-size: 9px;
  font-weight: 600;
  color: var(--ink3);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 4px 12px 2px;
}

/* Subject rows in sidebar */
.sb-subj-list { padding: 2px 8px 6px; }
.sb-subj-row {
  padding: 6px 8px;
  border-radius: var(--r);
  cursor: pointer;
  margin-bottom: 2px;
  transition: background 0.12s;
}
.sb-subj-row:hover  { background: var(--surface); }
.sb-subj-row.active { background: var(--surface); }
.sb-subj-name {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--ink);
  margin-bottom: 4px;
}
.sb-subj-pct { font-size: 10px; color: var(--ink3); }
.sb-subj-row.active .sb-subj-name { color: var(--teal); font-weight: 600; }
.sb-subj-row.active .sb-subj-pct  { color: var(--teal); }
.sb-bar-track { height: 3px; background: var(--border); border-radius: 2px; overflow: hidden; }
.sb-bar-fill  { height: 100%; border-radius: 2px; transition: width 0.4s; }

/* Day progress in sidebar */
.sb-day-prog {
  margin-top: auto;
  padding: 10px 10px 12px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.sb-day-title {
  font-size: 9px;
  font-weight: 600;
  color: var(--ink3);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.sb-day-stats {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
}
.sb-day-stat {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 4px;
  text-align: center;
}
.sb-day-n { font-size: 15px; font-weight: 500; color: var(--ink); }
.sb-day-n.correct { color: var(--teal); }
.sb-day-l { font-size: 9px; color: var(--ink3); margin-top: 1px; }
.sb-day-subj-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
}
.sb-day-subj-name { font-size: 10px; color: var(--ink3); width: 44px; flex-shrink: 0; }
.sb-day-subj-track { flex: 1; height: 3px; background: var(--border); border-radius: 2px; overflow: hidden; }
.sb-day-subj-fill  { height: 100%; border-radius: 2px; }
.sb-day-subj-count { font-size: 9px; color: var(--ink3); min-width: 22px; text-align: right; }

/* ── MIDDLE PANEL — topic list ── */
.mid-panel {
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: var(--surface);
}
.mid-hdr {
  padding: 12px 14px 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.mid-title { font-size: 13px; font-weight: 600; color: var(--ink); }
.mid-sub   { font-size: 10px; color: var(--ink3); margin-top: 2px; }
.mid-stats {
  display: flex;
  gap: 4px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.mid-stat {
  flex: 1;
  padding: 5px 4px;
  border-radius: 7px;
  text-align: center;
}
.mid-stat-n { font-size: 14px; font-weight: 500; }
.mid-stat-l { font-size: 8px; margin-top: 1px; }
.mid-topic-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 6px;
}
.mid-topic-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 9px;
  border-radius: var(--r);
  cursor: pointer;
  margin-bottom: 2px;
  transition: background 0.12s;
  border: 1px solid transparent;
}
.mid-topic-item:hover { background: var(--surface2); }
.mid-topic-item.active {
  background: var(--teal-l);
  border-color: var(--teal-b);
}
.mid-topic-name {
  flex: 1;
  font-size: 11px;
  color: var(--ink);
  line-height: 1.35;
}
.mid-topic-item.active .mid-topic-name { color: var(--teal); font-weight: 600; }
.mid-topic-bar { width: 28px; height: 3px; background: var(--border); border-radius: 2px; overflow: hidden; flex-shrink: 0; }
.mid-topic-bar-fill { height: 100%; border-radius: 2px; }

/* Mastery pills */
.mpill {
  font-size: 9px;
  padding: 2px 6px;
  border-radius: 10px;
  white-space: nowrap;
  flex-shrink: 0;
}
.mp-mastery { background: #e8f4f2; color: #1a5e58;  border-color: #4a9490; }
.mp-proficient { background: #eaf4ee; color: #2a6e3e;  border-color: #5aa078; }
.mp-competent { background: #f2f6ea; color: #4e6e1e;  border-color: #88a850; }
.mp-developing { background: #f8f2e8; color: #8a6010;  border-color: #c09040; }
.mp-beginner { background: #f8eeed; color: #8f3f3f;  border-color: #b87070; }
.mp-notstarted { background: #f2f0ed; color: #7a746e;  border-color: #a8a29a; }
.mp-started { background: #edf2f8; color: #4a6e9f;  border-color: #7a9abf; }

/* ── MAIN PANEL — topic studio ── */
.main {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: var(--surface);
}
.main-hdr {
  padding: 12px 16px 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.main-title { font-size: 14px; font-weight: 600; color: var(--ink); }
.main-meta  { font-size: 10px; color: var(--ink3); margin-top: 2px; }
.main-rec   {
  display: inline-block;
  font-size: 10px;
  background: var(--amber-l);
  color: var(--amber);
  padding: 2px 9px;
  border-radius: 10px;
  margin-top: 4px;
}

/* Content type tabs */
.content-tabs {
  display: flex;
  gap: 4px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.ct-tab {
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  font-family: 'Sora', sans-serif;
  font-size: 11px;
  font-weight: 500;
  color: var(--ink2);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.ct-tab:hover  { border-color: var(--teal-b); color: var(--teal); }
.ct-tab.active { background: var(--ink); color: #fff; border-color: transparent; }

/* Topic studio body */
.main-body {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
}

/* ── V2 content areas — full style enforcement ───────────────────────────
   High specificity rules so v2 layout never bleeds into generated content.
   Both desktop (#v2-content-area) and mobile (#mob-content-area) covered.
   ──────────────────────────────────────────────────────────────────────── */

#v2-content-area,
#mob-content-area {
  margin-top: 12px;
}

/* Mobile content area scroll */
#mob-content-area {
  padding: 10px 12px 120px;
  overflow-y: auto;
  flex: 1;
}

/* ── Section header ── */
#v2-content-area .section-head,
#mob-content-area .section-head {
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
#v2-content-area .sh-title,
#mob-content-area .sh-title {
  font-size: 15px !important;
  font-weight: 600;
  color: var(--ink);
}
#v2-content-area .sh-sub,
#mob-content-area .sh-sub {
  font-size: 11px !important;
  color: var(--ink3);
  margin-top: 3px;
}

/* ── Concepts grid ── */
#v2-content-area .concepts-grid,
#mob-content-area .concepts-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  margin-top: 4px;
}
#mob-content-area .concepts-grid {
  grid-template-columns: 1fr !important;
  gap: 8px;
}

/* ── Concept card ── */
#v2-content-area .concept-card,
#mob-content-area .concept-card {
  display: flex !important;
  gap: 12px;
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--r);
  padding: 14px !important;
  box-shadow: 0 1px 3px rgba(18,16,14,0.04);
  transition: box-shadow 0.15s;
}
#v2-content-area .concept-card:hover,
#mob-content-area .concept-card:hover {
  box-shadow: 0 2px 10px rgba(18,16,14,0.08);
}
#v2-content-area .concept-card.concept-book,
#mob-content-area .concept-card.concept-book {
  border-color: var(--teal-b) !important;
  background: var(--teal-l) !important;
}
#v2-content-area .concept-num,
#mob-content-area .concept-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--teal);
  background: var(--teal-l);
  border: 1px solid var(--teal-b);
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex !important;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}
#v2-content-area .concept-body,
#mob-content-area .concept-body  { flex: 1; min-width: 0; }

#v2-content-area .concept-title,
#mob-content-area .concept-title {
  font-size: 14px !important;
  font-weight: 600;
  color: var(--ink) !important;
  margin-bottom: 3px;
  line-height: 1.4;
}
#v2-content-area .concept-topic-tag,
#mob-content-area .concept-topic-tag {
  font-size: 10px !important;
  color: var(--teal) !important;
  font-weight: 600;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
#v2-content-area .concept-explanation,
#mob-content-area .concept-explanation {
  font-size: 13px !important;
  color: var(--ink2) !important;
  line-height: 1.65;
}
#v2-content-area .concept-book-ref,
#mob-content-area .concept-book-ref {
  display: flex !important;
  align-items: flex-start;
  gap: 6px;
  margin-top: 10px;
  padding: 8px 10px;
  background: var(--surface2) !important;
  border-radius: 6px;
  font-size: 12px;
  color: var(--ink2);
  line-height: 1.5;
}

/* ── Exercises / Examples ── */
#v2-content-area .ex-block,
#mob-content-area .ex-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px;
  margin-bottom: 12px;
}
#v2-content-area .exq-card,
#mob-content-area .exq-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px;
  margin-bottom: 12px;
}

/* ── Quiz cards ── */
#v2-content-area .quiz-card,
#mob-content-area .quiz-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px;
  margin-bottom: 12px;
}
#v2-content-area .quiz-opt,
#mob-content-area .quiz-opt {
  display: block !important;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  margin-bottom: 6px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
#v2-content-area .quiz-opt:hover,
#mob-content-area .quiz-opt:hover { background: var(--teal-l); border-color: var(--teal-b); }
#v2-content-area .quiz-opt-selected,
#mob-content-area .quiz-opt-selected { background: var(--teal-l) !important; border-color: var(--teal) !important; color: var(--teal) !important; font-weight: 600; }
#v2-content-area .quiz-opt-correct,
#mob-content-area .quiz-opt-correct  { background: var(--green-l) !important; border-color: var(--green) !important; color: var(--green) !important; }
#v2-content-area .quiz-opt-wrong,
#mob-content-area .quiz-opt-wrong    { background: var(--red-l) !important; border-color: var(--red) !important; color: var(--red) !important; }

/* ── Curriculum cards ── */
#v2-content-area .card,
#mob-content-area .card {
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--r);
  padding: 14px;
  margin-bottom: 10px;
}

/* ── Eval box ── */
#v2-content-area .eval-box,
#mob-content-area .eval-box {
  background: var(--surface2);
  border-radius: 8px;
  padding: 10px 12px;
  margin-top: 10px;
  font-size: 13px;
}

/* ── Empty state ── */
#v2-content-area .empty,
#mob-content-area .empty {
  color: var(--ink3);
  font-size: 13px;
  padding: 2rem 0;
  text-align: center;
}


/* Stats row in main panel */
.studio-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 14px;
}
.studio-stat {
  background: var(--surface2);
  border-radius: var(--r);
  padding: 8px;
  text-align: center;
}
.studio-stat-n { font-size: 16px; font-weight: 500; color: var(--ink); }
.studio-stat-l { font-size: 9px; color: var(--ink3); margin-top: 2px; }

/* Toughness slider row */
.tough-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.tough-label { font-size: 11px; color: var(--ink3); white-space: nowrap; }
.tough-track { flex: 1; height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.tough-fill  { height: 100%; background: var(--teal); border-radius: 2px; }
.tough-val   { font-size: 11px; font-weight: 600; color: var(--ink); min-width: 48px; }
input[type=range] {
  -webkit-appearance: none;
  flex: 1;
  height: 4px;
  border-radius: 2px;
  cursor: pointer;
  outline: none;
  border: none;
  background: var(--border);
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--teal);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* ── STEPPER + GENERATE — the unified control ── */
.gen-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.gen-stepper {
  display: flex;
  align-items: center;
  border: 1px solid var(--border2);
  border-radius: var(--r);
  overflow: hidden;
  height: 36px;
  flex: 1;
  max-width: 280px;
}
.gen-step-btn {
  width: 36px;
  height: 100%;
  border: none;
  background: var(--surface2);
  color: var(--ink2);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s;
  flex-shrink: 0;
  font-family: 'Sora', sans-serif;
}
.gen-step-btn:hover { background: var(--border); }
.gen-step-mid {
  flex: 1;
  height: 100%;
  background: var(--teal);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-left: 1px solid rgba(255,255,255,0.25);
  border-right: 1px solid rgba(255,255,255,0.25);
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  font-family: 'Sora', sans-serif;
  white-space: nowrap;
  padding: 0 8px;
  transition: background 0.12s;
}
.gen-step-mid:hover { background: var(--teal-d); }
.gen-step-count {
  background: rgba(255,255,255,0.22);
  border-radius: 8px;
  padding: 1px 7px;
  font-size: 11px;
}
.gen-hint { font-size: 10px; color: var(--ink3); }

/* ── PREVIOUS ATTEMPT PREVIEW ── */
.prev-box {
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 10px 12px;
  margin-top: 4px;
}
.prev-title {
  font-size: 9px;
  font-weight: 600;
  color: var(--ink3);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.prev-q-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  font-size: 11px;
  color: var(--ink);
  padding: 5px 0;
  border-bottom: 1px solid var(--border);
  line-height: 1.4;
}
.prev-q-row:last-child { border-bottom: none; padding-bottom: 0; }
.prev-q-res { font-size: 10px; white-space: nowrap; flex-shrink: 0; margin-top: 1px; }
.prev-q-res.ok  { color: var(--teal); }
.prev-q-res.err { color: var(--red); }

/* ════════════════════════════════════════════════════════════
   HOME SCREEN — subject cards + today's plan
   ════════════════════════════════════════════════════════════ */
.home-screen {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
}
.home-greeting {
  margin-bottom: 20px;
}
.home-greeting-name { font-size: 18px; font-weight: 600; color: var(--ink); margin-bottom: 2px; }
.home-greeting-sub  { font-size: 12px; color: var(--ink3); }

/* Subject cards grid */
.home-section-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--ink3);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.home-subj-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 24px;
}
.home-subj-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--rl);
  padding: 14px 12px;
  cursor: pointer;
  transition: all 0.15s;
}
.home-subj-card:hover {
  border-color: var(--teal-b);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.07);
}
.home-subj-card.active { border-color: var(--teal); }
.home-subj-name { font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.home-subj-bar-track { height: 3px; background: var(--border); border-radius: 2px; margin-bottom: 4px; overflow: hidden; }
.home-subj-bar-fill  { height: 100%; border-radius: 2px; transition: width 0.4s; }
.home-subj-pct { font-size: 10px; color: var(--ink3); }
.home-subj-card.active .home-subj-pct { color: var(--teal); }

/* Today's plan cards */
.today-plan-list { display: flex; flex-direction: column; gap: 6px; }
.today-plan-card {
  padding: 10px 12px;
  border-radius: var(--r);
  border-left: 3px solid var(--teal);
  background: var(--teal-l);
  cursor: pointer;
  transition: opacity 0.15s;
}
.today-plan-card:hover { opacity: 0.85; }
.today-plan-card.amber { border-color: var(--amber); background: var(--amber-l); }
.today-plan-title { font-size: 12px; font-weight: 600; color: var(--ink); }
.today-plan-sub   { font-size: 11px; color: var(--ink3); margin-top: 2px; }
.today-plan-card.amber .today-plan-title { color: var(--ink); }
.today-plan-card.amber .today-plan-sub   { color: var(--amber); }

/* ════════════════════════════════════════════════════════════
   CONTENT AREA — questions, exercises, curriculum etc.
   (preserved from v1)
   ════════════════════════════════════════════════════════════ */
.agent-bar    { display: flex; align-items: center; gap: 8px; padding: 9px 14px; background: var(--surface2); border-radius: var(--r); border: 1px solid var(--border); font-size: 12px; color: var(--ink2); margin-bottom: 12px; }
.a-dot        { width: 7px; height: 7px; border-radius: 50%; background: #22c55e; flex-shrink: 0; }
.a-dot.on     { background: #f59e0b; animation: pulse 1s infinite; }
@keyframes pulse { 0%,100%{opacity:1}50%{opacity:0.2} }

.card        { background: var(--surface); border: 1px solid var(--border); border-radius: var(--rl); padding: 1.25rem 1.5rem; margin-bottom: .75rem; }
.card-head   { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.card-title  { font-family: 'Fraunces', serif; font-size: 16px; font-weight: 300; }
.card-body   { font-size: 13px; color: var(--ink2); line-height: 1.7; }
.badge       { display: inline-flex; padding: 3px 9px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.b-teal      { background: var(--teal-l); color: var(--teal); border: 1px solid var(--teal-b); }
.b-amber     { background: var(--amber-l); color: var(--amber); }
.b-green     { background: var(--green-l); color: var(--green); border: 1px solid var(--green-b); }
.b-red       { background: var(--red-l); color: var(--red); border: 1px solid var(--red-b); }
.obj         { display: flex; gap: 8px; font-size: 12px; color: var(--ink2); margin-top: 5px; line-height: 1.5; }
.info-pill   { display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px; border-radius: 20px; background: var(--teal-l); border: 1px solid var(--teal-b); font-size: 11px; color: var(--teal); margin-bottom: 10px; }

.ex-block    { background: var(--surface2); border-radius: var(--r); padding: 1rem; margin-bottom: .75rem; border: 1px solid var(--border); }
.ex-label    { font-size: 10px; font-weight: 600; color: var(--ink3); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }
.ex-q        { font-size: 13px; font-weight: 500; color: var(--ink); margin-bottom: 10px; line-height: 1.5; }
.step        { display: flex; gap: 10px; margin-bottom: 7px; align-items: flex-start; }
.sn          { width: 22px; height: 22px; border-radius: 50%; background: var(--teal); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 10px; font-weight: 600; flex-shrink: 0; margin-top: 1px; }
.st-text     { font-size: 12px; color: var(--ink); line-height: 1.6; }
.ans-reveal  { margin-top: 10px; padding: 8px 12px; background: var(--green-l); border-radius: 8px; font-size: 12px; color: var(--green); font-weight: 500; border: 1px solid var(--green-b); }

.exq-card    { border: 1px solid var(--border); border-radius: var(--r); padding: 1rem; margin-bottom: .75rem; background: var(--surface); }
.exq-meta    { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.exq-label   { font-size: 10px; font-weight: 600; color: var(--ink3); text-transform: uppercase; letter-spacing: .06em; }
.exq-q       { font-size: 13px; color: var(--ink); line-height: 1.6; margin-bottom: 10px; }
textarea     { width: 100%; padding: 8px 12px; border-radius: var(--r); border: 1px solid var(--border2); background: var(--surface); font-family: 'Sora', sans-serif; font-size: 16px; color: var(--ink); resize: vertical; min-height: 60px; outline: none; transition: border-color 0.15s; }
textarea:focus { border-color: var(--teal); }
.eval-box    { margin-top: 8px; padding: 9px 12px; border-radius: 8px; font-size: 12px; line-height: 1.6; }
.ev-good     { background: var(--green-l); color: var(--green); border: 1px solid var(--green-b); }
.ev-ok       { background: var(--amber-l); color: var(--amber); }
.ev-poor     { background: var(--red-l); color: var(--red); border: 1px solid var(--red-b); }
.row-btns    { display: flex; gap: 8px; margin-top: 8px; }

.rbtn        { padding: 7px 14px; border-radius: 8px; border: 1px solid var(--border2); background: transparent; font-family: 'Sora', sans-serif; font-size: 12px; font-weight: 500; color: var(--ink); cursor: pointer; transition: all 0.15s; }
.rbtn:hover  { background: var(--surface2); }
.rbtn.primary { background: var(--teal); color: #fff; border-color: transparent; }
.rbtn.primary:hover { background: var(--teal-d); }

.res-hero    { text-align: center; padding: 2rem; background: var(--surface2); border-radius: var(--rl); border: 1px solid var(--border); margin-bottom: 1rem; }
.res-grade   { font-family: 'Fraunces', serif; font-size: 64px; font-weight: 300; color: var(--teal); line-height: 1; }
.res-pct     { font-size: 15px; color: var(--ink2); margin-top: 4px; }
.res-msg     { font-size: 12px; color: var(--ink3); margin-top: 6px; font-style: italic; }
.res-grid    { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-bottom: 1rem; }
.rs          { background: var(--surface2); border-radius: var(--r); padding: 12px; text-align: center; border: 1px solid var(--border); }
.rs-v        { font-family: 'Fraunces', serif; font-size: 24px; font-weight: 300; color: var(--ink); }
.rs-l        { font-size: 11px; color: var(--ink3); margin-top: 2px; }

.empty       { text-align: center; padding: 3rem 1rem; font-size: 13px; color: var(--ink3); line-height: 1.8; font-style: italic; }

.loading-state { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 2.5rem; gap: 12px; }
.spinner     { width: 24px; height: 24px; border: 2px solid var(--border2); border-top-color: var(--teal); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.p-tasks { display:flex;flex-direction:column;gap:7px; }
.p-task  { display:flex;align-items:center;gap:9px;font-size:12px;color:var(--ink2); }
.p-dot   { width:7px;height:7px;border-radius:50%;background:var(--border2);flex-shrink:0;transition:background .3s; }
.p-dot.run  { background:#f59e0b;animation:pulse 1s infinite; }
.p-dot.done { background:var(--teal);animation:none; }

/* Quiz styles */
.sec-nav      { display: inline-flex; gap: 4px; padding: 4px; background: var(--surface2); border-radius: var(--r); }
.st           { padding: 7px 14px; border-radius: 8px; border: none; background: transparent; font-family: 'Sora', sans-serif; font-size: 12px; font-weight: 500; color: var(--ink2); cursor: pointer; transition: all 0.15s; }
.st.active    { background: var(--surface); color: var(--ink); box-shadow: 0 1px 4px rgba(18,16,14,0.08); }

/* Submit all bar */
.submit-all-bar { display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 14px;background:var(--surface2);border-radius:var(--r);border:1px solid var(--border);margin-bottom:8px; }
.submit-all-info { font-size:11px;color:var(--ink2); }
.submit-all-btn  { padding:6px 14px;border-radius:8px;border:none;background:var(--teal);color:#fff;font-family:'Sora',sans-serif;font-size:12px;font-weight:500;cursor:pointer; }

.share-bar   { display:flex;gap:8px;flex-wrap:wrap;margin-bottom:1rem;align-items:center; }
.tough-lock-hint { font-size:11px;color:var(--amber);background:var(--amber-l);border-radius:6px;padding:6px 10px;margin-top:4px;cursor:pointer; }

.dl-btn { display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:var(--r);border:1px solid var(--border);background:var(--surface);font-family:'Sora',sans-serif;font-size:12px;font-weight:500;color:var(--ink2);cursor:pointer;transition:all 0.15s; }
.dl-btn:hover { border-color:var(--teal);background:var(--teal-l);color:var(--teal); }
.dl-btn.dl-full { border-color:var(--teal-b);color:var(--teal); }
.dl-icon { font-size:14px; }

/* mob-screens hidden on desktop via media query */

/* ── Plans modal — wider on desktop ── */


/* ── Mobile back button — always visible in screen header ── */
.mob-screen-hdr {
  display: flex !important;
}

/* ── Ensure mob-studio-body scrolls properly ── */
#mob-studio {
  overflow-y: auto;
}
.mob-studio-body {
  overflow-y: visible;
}

/* ════════════════════════════════════════════════════════════
   TOAST
   ════════════════════════════════════════════════════════════ */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  padding: 10px 18px; border-radius: var(--r);
  background: var(--ink); color: #fff; font-size: 13px;
  opacity: 0; transform: translateY(10px);
  transition: all 0.25s; pointer-events: none; z-index: 9999;
  box-shadow: 0 4px 20px rgba(18,16,14,0.25);
}
.toast.show    { opacity: 1; transform: translateY(0); }
.toast.success { background: var(--teal); }
.toast.error   { background: var(--red); }

/* ════════════════════════════════════════════════════════════
   MODALS — unchanged from v1
   ════════════════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.modal-box {
  background: var(--surface); border-radius: calc(var(--r) * 2);
  width: 100%; max-width: 460px; max-height: 90vh;
  display: flex; flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.modal-head, .modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 1.5rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-header h3, .modal-head span { font-size: 16px; font-weight: 700; color: var(--ink); margin: 0; }
.modal-close { background: none; border: none; font-size: 18px; color: var(--ink3); cursor: pointer; padding: 2px 6px; border-radius: 4px; line-height: 1; }
.modal-close:hover { background: var(--surface2); color: var(--ink); }
.modal-body { padding: 1.25rem 1.5rem; overflow-y: auto; flex: 1; display: flex; flex-direction: column; gap: 1rem; }
.modal-footer { padding: 1rem 1.5rem; border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; flex-shrink: 0; gap: 8px; }
.pf-field { display: flex; flex-direction: column; gap: 4px; }
.pf-field label { font-size: 12px; font-weight: 600; color: var(--ink2); }
.pf-field input { width: 100%; box-sizing: border-box; }
.pf-hint { font-size: 11px; color: var(--ink3); }
.pf-class-btn { padding: 5px 10px; border-radius: var(--r); border: 1px solid var(--border); background: var(--surface2); font-size: 12px; font-weight: 500; cursor: pointer; color: var(--ink2); transition: all 0.12s; }
.pf-class-btn.sel, .pf-class-btn:hover { border-color: var(--teal); background: var(--teal-l); color: var(--teal); }
.share-btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: var(--r); border: 1.5px solid var(--border); background: var(--surface2); color: var(--ink); font-size: 13px; font-weight: 500; cursor: pointer; transition: all 0.15s; }
.share-btn:hover { transform: translateY(-1px); box-shadow: 0 3px 8px rgba(0,0,0,0.1); }
.share-btn.whatsapp:hover { border-color: #25D366; color: #128C7E; }
.share-btn.sms:hover      { border-color: #007AFF; color: #007AFF; }
.share-btn.email:hover    { border-color: var(--teal); color: var(--teal); }

/* ════════════════════════════════════════════════════════════
   MOBILE LAYOUT (≤ 767px)
   ════════════════════════════════════════════════════════════ */
@media (max-width: 767px) {
  html, body {
    overflow-x: hidden;
    max-width: 100vw;
    height: 100%;
  }

  /* App shell */
  #s-app {
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
  }

  .topbar {
    height: auto;
    min-height: 48px;
    padding: 8px 12px;
    flex-wrap: nowrap;
    gap: 8px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 200;
    width: 100%;
  }
  .tb-school { display: none; }
  .tb-usage-track { width: 44px; }

  /* App body — full height minus topbar, no overflow so fixed nav shows */
  .app-body {
    display: block !important;
    grid-template-columns: none !important;
    height: calc(100vh - 48px);
    height: calc(100dvh - 48px);
    position: relative;
    overflow: hidden;
  }
  /* Hide desktop panels on mobile */
  .sidebar, .mid-panel { display: none !important; }
  .main { display: none !important; }

  /* Mobile screens — fixed full-screen panels */
  .mob-screen {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 56px;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--surface);
    transition: transform 0.28s ease;
    width: 100vw;
    box-sizing: border-box;
    z-index: 50;
    padding-top: 48px;
  }
  .mob-screen.hidden-left  { transform: translateX(-100%); }
  .mob-screen.hidden-right { transform: translateX(100%);  }
  .mob-screen.visible      { transform: translateX(0);     }

  /* Mobile screen: Home */
  #mob-home {
    display: block;
    padding: 14px 14px 14px;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
  }

  /* Mobile screen: Progress (topic list) */
  #mob-progress {
    display: block;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
  }
  .mob-screen-hdr {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    position: sticky;
    top: 0;
    z-index: 10;
  }
  .mob-back-btn {
    font-size: 12px;
    color: var(--teal);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    font-family: 'Sora', sans-serif;
    flex-shrink: 0;
  }
  .mob-screen-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
    flex: 1;
  }
  .mob-screen-count {
    font-size: 11px;
    color: var(--ink3);
  }

  /* Mobile screen: Topic Studio */
  #mob-studio {
    display: block;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
  }

  /* Bottom nav */
  .mob-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    z-index: 9999;
    padding-bottom: env(safe-area-inset-bottom, 0);
  }
  .mob-nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-family: 'Sora', sans-serif;
    font-size: 9px;
    color: var(--ink3);
    transition: color 0.15s;
    padding: 6px 0;
  }
  .mob-nav-btn.active { color: var(--teal); }
  .mob-nav-dot {
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--teal);
    margin-bottom: 1px;
  }
  .mob-nav-icon { font-size: 18px; line-height: 1; }

  /* Mobile subject grid */
  .home-subj-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 16px;
  }
  .home-subj-card { padding: 10px; }

  /* Mobile day progress — inline on home */
  .mob-day-prog {
    border-top: 1px solid var(--border);
    padding: 12px 0;
    margin-bottom: 14px;
  }

  /* Mobile topic list */
  .mid-topic-list { padding: 4px 10px; }
  .mid-topic-item { padding: 9px 8px; }
  .mid-topic-name { font-size: 12px; }

  /* Mobile studio */
  .studio-stats          { grid-template-columns: repeat(4, 1fr); gap: 4px; }
  .studio-stat           { padding: 6px 4px; }
  .studio-stat-n         { font-size: 13px; }
  .studio-stat-l         { font-size: 8px; }
  .gen-stepper  { max-width: 100%; }

  /* Content tabs wrap on mobile */
  .content-tabs { padding: 8px 12px; gap: 6px; }

  /* Main body padding on mobile */
  .mob-studio-body { padding: 12px 14px; overflow-y: auto; }

  /* Toast at bottom above nav */
  .toast { bottom: 68px; right: 12px; left: 12px; text-align: center; }
}

/* ════════════════════════════════════════════════════════════
   DESKTOP FIXED-VIEWPORT
   ════════════════════════════════════════════════════════════ */
@media (min-width: 768px) {
  #s-app { height: 100vh; overflow: hidden; }
  .app-body { min-height: 0; }
  .sidebar  { height: 100%; }
  .mid-panel { height: 100%; }
  .main     { height: 100%; }
  .main-body { flex: 1 1 0; overflow-y: auto; min-height: 0; }

  /* Hide mobile-only elements */
  .mob-screen, .mob-bottom-nav,
  #mob-home, #mob-progress, #mob-studio { display: none !important; }

  /* Show desktop panels */
  .sidebar    { display: flex !important; }
  .mid-panel  { display: flex !important; }
  .main       { display: flex !important; }

  /* Topbar row2 hidden on desktop */
  .topbar-row2 { display: none; }
}


/* ════════════════════════════════════════════════════════════
   PLANS, UPGRADE, DAY PROGRESS — ported from v1
   ════════════════════════════════════════════════════════════ */


/* ── Today tab styles ──────────────────────────────────────────────────────── */

.today-encourage {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  background: var(--teal-l);
  border: 1px solid var(--teal-b);
  border-radius: var(--r);
  padding: 10px 12px;
  margin-bottom: 12px;
  font-size: 12px;
  color: var(--ink2);
  line-height: 1.5;
}

.today-priority-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.today-priority-chip {
  border-radius: var(--r);
  padding: 8px 10px;
  font-size: 12px;
  line-height: 1.4;
}
.today-priority-warn    { background: var(--red-l);   color: var(--red); }
.today-priority-ok      { background: var(--teal-l);  color: var(--teal); }
.today-priority-neutral { background: var(--surface2); color: var(--ink2); }
.today-priority-reason  { display: block; font-size: 11px; opacity: .75; margin-top: 2px; }

.today-hint {
  font-size: 11px;
  color: var(--ink3);
  text-align: center;
  padding: 8px 0;
}

/* Today topic cards in mid panel */
.today-card {
  border: 1px solid var(--border2);
  border-radius: var(--r);
  padding: 10px 12px;
  margin-bottom: 6px;
  cursor: pointer;
  transition: background .1s;
}
.today-card:hover { background: var(--surface2) !important; cursor: pointer; }
.today-card.tc-active { border-color: var(--teal); background: var(--teal-l); }

.tc-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 4px;
}
.tc-name   { font-size: 13px; font-weight: 500; color: var(--ink); }
.tc-reason { font-size: 11px; color: var(--ink3); line-height: 1.4; margin-bottom: 6px; }

.tc-sig { font-size: 10px; padding: 2px 7px; border-radius: 10px; white-space: nowrap; flex-shrink: 0; }
.tcs-notstarted { background: var(--surface2);  color: var(--ink3); }
.tcs-started    { background: #edf2f8;             color: #4a6e9f; }
.tcs-inprogress { background: var(--amber-l);    color: var(--amber); }
.tcs-allcorrect { background: var(--green-l);    color: var(--green); }
.tcs-partial    { background: var(--amber-l);    color: var(--amber); }
.tcs-rework     { background: var(--red-l);      color: var(--red); }

.tc-prog-track { height: 3px; background: var(--border); border-radius: 2px; margin-bottom: 6px; }
.tc-prog-fill  { height: 3px; background: var(--amber);  border-radius: 2px; }

.tc-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.tc-badges { display: flex; gap: 5px; flex-wrap: wrap; align-items: center; }
.tc-badge  { font-size: 10px; background: var(--surface2); color: var(--ink3); padding: 2px 6px; border-radius: 4px; }
.tc-score  { font-size: 10px; color: var(--ink2); font-weight: 500; }

.tc-btn { font-size: 11px; padding: 4px 9px; border-radius: 6px; border: 0.5px solid var(--border2); background: var(--surface); color: var(--ink); cursor: pointer; white-space: nowrap; }
.tcb-primary { background: var(--teal); color: #fff; border-color: var(--teal); }
.tcb-muted   { color: var(--ink3); border-color: var(--border); }

/* Reason hint inside AI rec badge */
.today-reason-hint {
  display: block;
  font-size: 11px;
  color: var(--ink2);
  font-weight: 400;
  margin-top: 5px;
  padding: 6px 8px;
  background: var(--surface2);
  border-radius: 6px;
  border-left: 2px solid var(--teal);
  line-height: 1.4;
}

/* ── Home tab styles ────────────────────────────────────────────────────────── */

.home-greeting        { margin-bottom: 14px; }
.home-greeting-name   { font-size: 17px; font-weight: 500; color: var(--ink); margin-bottom: 2px; }
.home-greeting-sub    { font-size: 12px; color: var(--ink3); }

.home-day-stats       { display: grid; grid-template-columns: repeat(4,1fr); gap: 8px; margin-bottom: 16px; }
.home-day-stat        { background: var(--surface2); border-radius: var(--r); padding: 10px; text-align: center; }
.home-day-n           { font-size: 20px; font-weight: 500; color: var(--ink); }
.home-day-l           { font-size: 10px; color: var(--ink3); margin-top: 2px; }

.home-section-title   { font-size: 11px; font-weight: 600; color: var(--ink2); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 10px; }

.home-subj-grid       { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.home-sc              { border: 1px solid var(--border2); border-radius: var(--r); padding: 10px 12px; cursor: pointer; transition: background .1s; }
.home-sc:hover        { background: var(--surface2) !important; cursor: pointer; }
.home-sc-name         { font-size: 13px; font-weight: 500; color: var(--ink); margin-bottom: 1px; }
.home-sc-meta         { font-size: 10px; color: var(--ink3); margin-bottom: 6px; }
.home-sc-bar-track    { height: 3px; background: var(--border); border-radius: 2px; margin-bottom: 5px; }
.home-sc-bar-fill     { height: 3px; border-radius: 2px; }
.home-sc-footer       { display: flex; justify-content: space-between; align-items: center; }
.home-sc-pct          { font-size: 11px; font-weight: 500; }
.home-sc-badge        { font-size: 10px; padding: 2px 6px; border-radius: 8px; }
.home-badge-progress  { background: var(--amber-l); color: var(--amber); }
.home-badge-started   { background: #edf2f8; color: #4a6e9f; }
.home-badge-none      { background: var(--surface2); color: var(--ink3); }

/* Recently studied cards in mid panel */
.rc-section-label  { font-size: 10px; font-weight: 600; color: var(--ink2); text-transform: uppercase; letter-spacing: .06em; padding: 4px 2px 6px; display: flex; align-items: center; gap: 6px; }
.rc-section-label::after { content: ''; flex: 1; height: 0.5px; background: var(--border); }
.rc-card           { border: 1px solid var(--border2); border-radius: var(--r); padding: 10px 12px; margin-bottom: 6px; cursor: pointer; transition: background .1s; }
.rc-card:hover     { background: var(--surface2) !important; cursor: pointer; }
.rc-top            { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; margin-bottom: 2px; }
.rc-name           { font-size: 13px; font-weight: 500; color: var(--ink); line-height: 1.3; }
.rc-sub            { font-size: 10px; color: var(--ink3); margin-bottom: 5px; display: flex; align-items: center; gap: 4px; }
.rc-bar-track      { height: 3px; background: var(--border); border-radius: 2px; margin-bottom: 5px; }
.rc-bar-fill       { height: 3px; border-radius: 2px; }
.rc-footer         { display: flex; justify-content: space-between; align-items: center; }
.rc-meta           { font-size: 10px; color: var(--ink3); }

.home-today-dot    { width: 6px; height: 6px; border-radius: 50%; background: #1a5fa8; flex-shrink: 0; }
.nudge             { text-align: center; padding: 20px 10px; color: var(--ink3); font-size: 12px; line-height: 1.6; }

/* ── Review tab styles ──────────────────────────────────────────────────────── */

.review-summary    { font-size:11px; color:var(--ink3); padding:10px 14px 8px; border-bottom:1px solid var(--border); }
.review-date-group { margin-bottom:4px; }
.review-date-label { font-size:10px; font-weight:600; color:var(--ink2); text-transform:uppercase; letter-spacing:.06em; padding:10px 14px 6px; border-bottom:0.5px solid var(--border); background:var(--surface); position:sticky; top:0; }

.review-card       { padding:12px 14px; border-bottom:1px solid var(--border); transition:background .1s; }
.review-card:hover { background:var(--surface2); }
.rv-top            { display:flex; justify-content:space-between; align-items:flex-start; gap:8px; margin-bottom:4px; }
.rv-topic          { font-size:13px; font-weight:500; color:var(--ink); }
.rv-score          { font-size:13px; font-weight:600; flex-shrink:0; }
.rv-meta           { display:flex; gap:6px; align-items:center; flex-wrap:wrap; margin-bottom:6px; }
.rv-badge          { font-size:10px; padding:2px 7px; border-radius:8px; background:var(--surface2); color:var(--ink3); border:1px solid var(--border); }
.rv-badge-quiz     { background:#edf2f8; color:#4a6e9f; border-color:#9ab4d4; }
.rv-badge-exercise { background:#f2f6ea; color:#4e6e1e; border-color:#88a850; }
.rv-badge-examples { background:#f8f2e8; color:#8a6010; border-color:#c09040; }
.rv-badge-concepts { background:#f2f0ed; color:#7a746e; border-color:#a8a29a; }
.rv-time           { font-size:10px; color:var(--ink3); }
.rv-bar-track      { height:3px; background:var(--border); border-radius:2px; margin-bottom:8px; }
.rv-bar-fill       { height:3px; border-radius:2px; }
.rv-actions        { display:flex; gap:6px; align-items:center; }
.rv-btn-replay     { font-size:11px; padding:4px 10px; border-radius:6px; border:1px solid var(--border2); background:var(--surface); color:var(--ink); cursor:pointer; }
.rv-btn-replay:hover { background:var(--surface2); }
.rv-btn-retry      { font-size:11px; padding:4px 10px; border-radius:6px; border:none; background:#2a7a72; color:#fff; cursor:pointer; }
.rv-btn-retry:hover { background:#1e5e56; }
.rv-detail         { font-size:10px; color:var(--ink3); margin-left:auto; }

/* ── Replay view styles ─────────────────────────────────────────────────────── */
.replay-header      { margin-bottom:14px; }
.replay-title       { font-size:16px; font-weight:500; color:var(--ink); margin-bottom:4px; }
.replay-meta        { font-size:12px; color:var(--ink2); margin-bottom:6px; }
.replay-badge       { display:inline-block; font-size:11px; background:var(--surface2); color:var(--ink3); padding:3px 10px; border-radius:20px; border:1px solid var(--border); }
.replay-card        { border:1px solid var(--border2); border-radius:var(--r); padding:12px 14px; margin-bottom:8px; }
.replay-correct     { border-left:3px solid #2a7a72; background:#f8fdfb; }
.replay-wrong       { border-left:3px solid #b05c5c; background:#fdf8f8; }
.replay-q-head      { display:flex; justify-content:space-between; align-items:center; margin-bottom:6px; }
.replay-q-num       { font-size:11px; font-weight:500; color:var(--ink3); }
.replay-q-score     { font-size:11px; font-weight:500; padding:2px 8px; border-radius:10px; }
.rqs-ok             { background:#eaf4ee; color:#2a6e3e; }
.rqs-bad            { background:#f8eeed; color:#8f3f3f; }
.replay-q-text      { font-size:13px; color:var(--ink); margin-bottom:8px; line-height:1.5; }
.replay-answer      { font-size:12px; color:var(--ink2); margin-bottom:6px; }
.replay-answer-label{ color:var(--ink3); }
.replay-feedback    { font-size:12px; color:var(--ink2); background:var(--surface2); border-radius:6px; padding:8px 10px; line-height:1.5; }
.replay-options       { display:flex; flex-direction:column; gap:6px; margin-bottom:8px; }
.replay-opt           { padding:8px 12px; border-radius:7px; border:1px solid var(--border2); font-size:13px; color:var(--ink2); background:var(--surface); }
.ropt-correct         { border-color:#2a7a72; background:#f0fdf8; color:#1a5e48; font-weight:500; }
.ropt-wrong           { border-color:#b05c5c; background:#fdf0f0; color:#7a2a2a; }
.ropt-missed          { border-color:#b8882a; background:#fdf8ee; color:#7a5a10; }

.tb-credits-pill { font-size: 11px; padding: 4px 10px; border-radius: 20px; border: 1px solid var(--border2); background: var(--surface2); color: var(--ink2); cursor: pointer; white-space: nowrap; }
.tb-btn.tb-upgrade { display:flex !important; flex-direction:column !important; align-items:center !important; gap:1px; line-height:1.2; padding:4px 10px !important; }
.tb-upgrade-credits { font-size:9px; opacity:.85; font-weight:400; white-space:nowrap; }


/* ── Earn Credits pill (replaces Invite button) ────────────────────────────── */
.tb-btn-earn {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--teal-l);
  color: var(--teal);
  border: 1px solid var(--teal-b);
  font-family: 'Sora', sans-serif;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s;
}
.tb-btn-earn:hover { background: var(--teal-l); filter: brightness(.95); }

/* On mobile — make it more compact */
@media (max-width: 767px) {
  .tb-btn-earn {
    font-size: 10px;
    padding: 3px 8px;
  }
  /* Hide usage bar on mobile — show text only */
  .tb-usage-track { display: none !important; }
  .tb-usage-label { font-size: 10px; }
  .tb-usage-count { font-size: 10px; }
  /* Show credits sub-label on mobile */
  .tb-upgrade-credits { display: block !important; }
  /* Invite modal becomes bottom sheet on mobile */
  #invite-modal .modal-box {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0;
    border-radius: 14px 14px 0 0;
    max-height: 85vh;
    overflow-y: auto;
    width: 100%;
    max-width: 100%;
  }
}

/* ── Profile modal redesign ────────────────────────────────────────────────── */
.pf-section-label { font-size:10px; font-weight:600; color:var(--ink3); text-transform:uppercase; letter-spacing:.05em; padding-bottom:4px; border-bottom:0.5px solid var(--border); margin-top:4px; }
.pf-row { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.pf-class-grid-wrap { display:grid; grid-template-columns:repeat(5,1fr); gap:5px; margin-top:4px; }
.pf-sub-grid { display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.pf-sub-item { display:flex; align-items:flex-start; gap:8px; padding:9px 10px; border:1px solid var(--border2); border-radius:var(--r); cursor:pointer; transition:background .1s; position:relative; }
.pf-sub-item input[type="checkbox"] { position:absolute; opacity:0; width:0; height:0; }
.pf-sub-item:has(input:checked) { border-color:var(--teal); background:var(--teal-l); }
.pf-sub-check { width:16px; height:16px; border-radius:4px; border:1.5px solid var(--border2); flex-shrink:0; margin-top:1px; display:flex; align-items:center; justify-content:center; font-size:10px; color:transparent; }
.pf-sub-item:has(input:checked) .pf-sub-check { background:var(--teal); border-color:var(--teal); color:#fff; }
.pf-sub-label { font-size:12px; color:var(--ink); font-weight:500; line-height:1.3; }
.pf-sub-hint  { font-size:10px; color:var(--ink3); margin-top:2px; line-height:1.3; }
.pf-signout-btn { color:var(--red,#c0392b) !important; border-color:var(--red,#c0392b) !important; white-space:nowrap; flex-shrink:0; }

/* ── Welcome modal ─────────────────────────────────────────────────────────── */
.welcome-modal-box { max-width: 460px; padding: 0; }
.welcome-top { padding: 28px 28px 20px; text-align: center; }
.welcome-brand { font-size: 12px; font-weight: 500; color: var(--teal); margin-bottom: 12px; letter-spacing: .02em; }
.welcome-title { font-size: 18px; font-weight: 500; color: var(--ink); margin-bottom: 6px; line-height: 1.35; }
.welcome-sub { font-size: 13px; color: var(--ink3); line-height: 1.5; }
.welcome-divider { height: 0.5px; background: var(--border); margin: 0 28px; }
.welcome-steps { padding: 8px 28px 12px; }
.welcome-step { display: flex; align-items: flex-start; gap: 14px; padding: 13px 0; border-bottom: 0.5px solid var(--border2); }
.welcome-step:last-child { border-bottom: none; }
.welcome-step-num { width: 26px; height: 26px; border-radius: 50%; background: var(--teal-l); display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 500; color: var(--teal); flex-shrink: 0; margin-top: 1px; }
.welcome-step-title { font-size: 13px; font-weight: 500; color: var(--ink); margin-bottom: 3px; }
.welcome-step-hint { font-size: 12px; color: var(--ink3); line-height: 1.45; }
.welcome-footer { padding: 16px 28px 24px; text-align: center; border-top: 0.5px solid var(--border); }
.welcome-go-btn { padding: 9px 32px; border-radius: 20px; font-size: 13px; }

/* Mobile — bottom sheet */
@media (max-width: 767px) {
  #welcome-modal { align-items: flex-end; }
  #welcome-modal .welcome-modal-box {
    max-width: 100%;
    border-radius: 16px 16px 0 0;
    margin: 0;
  }
  #welcome-modal .welcome-modal-box::before {
    content: '';
    display: block;
    width: 36px;
    height: 4px;
    border-radius: 2px;
    background: var(--border2);
    margin: 14px auto 0;
  }
  .welcome-top { padding: 12px 20px 14px; }
  .welcome-divider { margin: 0 20px; }
  .welcome-steps { padding: 4px 20px 8px; }
  .welcome-step { gap: 12px; padding: 11px 0; }
  .welcome-step-hint { font-size: 11px; }
  .welcome-footer { padding: 12px 20px 20px; }
  .welcome-go-btn { width: 100%; padding: 11px 0; border-radius: 12px; }
}

/* ── Mobile day stats 2x2 grid ────────────────────────────────────────────── */
.mob-day-grid { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-bottom:14px; margin-top:14px; padding-top:14px; border-top:1px solid var(--border); }
.mob-day-card { background:var(--surface); border:1px solid var(--border); border-radius:var(--r); padding:10px 8px; display:flex; align-items:center; gap:10px; }
.mob-day-n { font-size:22px; font-weight:500; color:var(--teal); line-height:1; flex-shrink:0; }
.mob-day-l { font-size:11px; color:var(--ink3); line-height:1.3; }

/* ── Desktop home stats — 4 cards ──────────────────────────────────────────── */