/* ==========================================================================
   Certified AI Educator – Foundation
   Design: "Modern radiant" — luminous aurora washes over a near-white base,
   glass cards, one confident violet→fuchsia→amber gradient used everywhere
   that needs energy. Mobile-first; teachers follow along on phones.
   ========================================================================== */

:root {
  --bg: #faf9ff;
  --ink: #211c33;
  --ink-soft: #5c5574;
  --primary: #7c3aed;
  --primary-deep: #5b21b6;
  --grad: linear-gradient(120deg, #6d28d9 0%, #c026d3 52%, #f97316 115%);
  --grad-soft: linear-gradient(120deg, rgba(109, 40, 217, 0.09), rgba(192, 38, 211, 0.07), rgba(249, 115, 22, 0.08));
  --teal: #6d28d9;               /* semantic: links / structure  */
  --teal-soft: #f1ecfe;
  --accent: #f59e0b;             /* semantic: highlight / warmth */
  --accent-deep: #b45309;
  --accent-soft: #fef3c7;
  --margin-red: #e11d48;         /* semantic: weak / caution     */
  --rule: rgba(109, 40, 217, 0.12);
  --board: #251b52;              /* radiant panel base           */
  --chalk: #f6f3ff;
  --chalk-dim: rgba(246, 243, 255, 0.78);
  --good: #15803d;
  --good-soft: #e4f6e9;
  --bad: #dc2626;
  --bad-soft: #feecec;
  --card-bg: rgba(255, 255, 255, 0.82);
  --card-border: rgba(109, 40, 217, 0.13);
  --radius: 16px;
  --shadow: 0 2px 8px rgba(60, 30, 120, 0.06), 0 14px 40px rgba(60, 30, 120, 0.08);
  --glow: 0 6px 24px rgba(124, 58, 237, 0.28);
  --font-display: "Outfit", "Segoe UI", system-ui, sans-serif;
  --font-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 5.5rem; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--bg);
}

/* Aurora wash — fixed luminous layer behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(46rem 30rem at 4% -4%, rgba(124, 58, 237, 0.16), transparent 62%),
    radial-gradient(40rem 28rem at 102% 12%, rgba(249, 115, 22, 0.13), transparent 60%),
    radial-gradient(44rem 32rem at 50% 112%, rgba(192, 38, 211, 0.11), transparent 62%),
    radial-gradient(30rem 22rem at 88% 92%, rgba(14, 165, 233, 0.09), transparent 60%);
}

/* ---------- Header / nav ---------- */

.site-header {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(109, 40, 217, 0.14);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .bar {
  max-width: 62rem;
  margin: 0 auto;
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.brand {
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  letter-spacing: 0.005em;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand .mark {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--grad);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 1.02rem;
  font-weight: 700;
  flex: none;
  box-shadow: var(--glow);
}

.site-nav {
  margin-left: auto;
  display: flex;
  gap: 0.1rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 700;
  padding: 0.42rem 0.72rem;
  border-radius: 999px;
}

.site-nav a:hover { color: var(--primary-deep); background: var(--teal-soft); }

.site-nav a[aria-current="page"] {
  color: #fff;
  background: var(--grad);
  box-shadow: var(--glow);
}

/* ---------- Layout ---------- */

main {
  max-width: 62rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 4rem;
}

.narrow { max-width: 47rem; margin-inline: auto; }

h1, h2, h3 { font-family: var(--font-display); line-height: 1.16; color: var(--ink); }

h1 {
  font-size: clamp(2rem, 5.2vw, 3.1rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  margin: 0.5rem 0;
  background: linear-gradient(120deg, #37246b, #7c3aed 55%, #c026d3 105%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h2 { font-size: clamp(1.4rem, 3.5vw, 1.85rem); font-weight: 700; margin: 2.3rem 0 0.8rem; }
h3 { font-size: 1.15rem; font-weight: 700; margin: 1.5rem 0 0.5rem; }

p { margin: 0.6rem 0; }
.lead { font-size: 1.15rem; color: var(--ink-soft); }

a { color: var(--primary); }

ul, ol { padding-left: 1.4rem; }
li { margin: 0.3rem 0; }

.telugu { font-weight: 700; }

/* ---------- Glass card ---------- */

.card {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.35rem;
  margin: 1.1rem 0;
  position: relative;
  overflow: hidden;
}

/* Gradient spine replaces the old notebook margin line */
.card.ruled { padding-left: 1.6rem; }

.card.ruled::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 5px;
  background: var(--grad);
}

/* ---------- Radiant panel (was blackboard) ---------- */

.board {
  background:
    radial-gradient(28rem 16rem at 88% -20%, rgba(249, 115, 22, 0.28), transparent 60%),
    radial-gradient(26rem 18rem at -10% 110%, rgba(192, 38, 211, 0.3), transparent 62%),
    linear-gradient(135deg, #2b1a5e 0%, #45219c 55%, #6d1f9c 100%);
  color: var(--chalk);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 18px 48px rgba(64, 24, 140, 0.35);
  padding: 1.5rem 1.6rem;
  margin: 1.5rem 0;
}

.board h2, .board h3 {
  color: #fff;
  margin-top: 0;
  background: none;
  -webkit-background-clip: initial;
  background-clip: initial;
}

.board .chalk-label {
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  background: linear-gradient(90deg, #fbbf24, #f0abfc);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.45rem;
}

.board p { color: var(--chalk-dim); }
.board strong { color: #fff; }
.board a { color: #fbbf24; }

/* ---------- Hero ---------- */

.hero { padding: 1.7rem 0 0.5rem; }

.hero > * { animation: rise 0.6s ease both; }
.hero > *:nth-child(2) { animation-delay: 0.07s; }
.hero > *:nth-child(3) { animation-delay: 0.14s; }
.hero > *:nth-child(4) { animation-delay: 0.21s; }
.hero > *:nth-child(5) { animation-delay: 0.28s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .hero > * { animation: none; }
}

.hero .kicker {
  display: inline-block;
  font-weight: 800;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.34rem 0.9rem;
  border-radius: 999px;
  color: var(--primary-deep);
  background: rgba(255, 255, 255, 0.7);
  border: 1.5px solid transparent;
  background-image: linear-gradient(rgba(255,255,255,0.85), rgba(255,255,255,0.85)), var(--grad);
  background-origin: border-box;
  background-clip: padding-box, border-box;
}

.hero .telugu-line {
  font-size: 1.35rem;
  color: var(--primary-deep);
  margin-top: 0.2rem;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.72rem 1.5rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: var(--glow);
}
.btn-primary:hover { filter: brightness(1.08); transform: translateY(-1px); }

.btn-accent {
  background: linear-gradient(120deg, #f59e0b, #f97316);
  color: #3b1c04;
  box-shadow: 0 6px 22px rgba(249, 115, 22, 0.32);
}
.btn-accent:hover { filter: brightness(1.06); transform: translateY(-1px); }

.btn-ghost {
  background: rgba(255, 255, 255, 0.65);
  color: var(--primary-deep);
  border: 1.5px solid rgba(109, 40, 217, 0.35);
}
.btn-ghost:hover { background: var(--teal-soft); }

.btn:active { transform: translateY(1px); }

/* ---------- Chips & badges ---------- */

.chip {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.18rem 0.7rem;
  border-radius: 999px;
  background: var(--teal-soft);
  color: var(--primary-deep);
}

.chip.accent { background: var(--accent-soft); color: var(--accent-deep); }
.chip.good { background: var(--good-soft); color: var(--good); }
.chip.bad { background: var(--bad-soft); color: var(--bad); }

/* ---------- Module header ---------- */

.module-head {
  display: flex;
  gap: 1.1rem;
  align-items: flex-start;
  margin-top: 0.5rem;
}

.module-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.5rem;
  line-height: 1;
  color: #fff;
  background: var(--grad);
  border-radius: 16px;
  padding: 0.6rem 0.85rem;
  flex: none;
  box-shadow: var(--glow);
}

.module-meta { font-size: 0.92rem; color: var(--ink-soft); font-weight: 700; }
.module-meta .dot { margin: 0 0.4rem; color: #c026d3; }

/* ---------- Steps (demo-along) ---------- */

.steps { counter-reset: step; padding: 0; margin: 1rem 0; list-style: none; }

.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0 0 1.15rem 3.2rem;
  margin: 0;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  display: grid;
  place-items: center;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
}

.steps > li::after {
  content: "";
  position: absolute;
  left: 1.05rem;
  top: 2.5rem;
  bottom: 0.2rem;
  width: 2px;
  background: linear-gradient(to bottom, rgba(124, 58, 237, 0.35), rgba(192, 38, 211, 0.12));
}

.steps > li:last-child::after { display: none; }

.steps > li > strong { display: block; font-size: 1.05rem; color: var(--ink); font-family: var(--font-display); }

/* ---------- Prompt cards ---------- */

.prompt-card {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1.5px solid rgba(109, 40, 217, 0.3);
  border-radius: 14px;
  margin: 0.9rem 0;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.prompt-card .prompt-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.9rem;
  background: var(--grad-soft);
  border-bottom: 1px solid rgba(109, 40, 217, 0.18);
}

.prompt-card .prompt-title {
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--ink);
  font-size: 0.95rem;
  flex: 1;
}

.prompt-card .prompt-text {
  padding: 0.85rem 1rem;
  font-size: 1rem;
  white-space: pre-wrap;
}

.prompt-card .ph {
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-weight: 700;
  border-radius: 6px;
  padding: 0 0.28rem;
}

.copy-btn {
  flex: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  background: var(--grad);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.42rem 1rem;
  cursor: pointer;
  min-width: 5.4rem;
  box-shadow: 0 3px 12px rgba(124, 58, 237, 0.28);
}

.copy-btn:hover { filter: brightness(1.08); }
.copy-btn.copied { background: var(--good); box-shadow: none; }

.prompt-note { font-size: 0.88rem; color: var(--ink-soft); padding: 0 1rem 0.75rem; margin: 0; }

.weak-strong { border-color: rgba(225, 29, 72, 0.45); }
.weak-strong .prompt-head { background: var(--bad-soft); border-bottom-color: rgba(225, 29, 72, 0.3); }

/* ---------- Tables ---------- */

.table-wrap { overflow-x: auto; margin: 1rem 0; border-radius: 14px; }

table.neat {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow);
  font-size: 0.98rem;
  min-width: 30rem;
}

table.neat th {
  background: var(--grad);
  color: #fff;
  text-align: left;
  padding: 0.62rem 0.9rem;
  font-family: var(--font-display);
  font-weight: 700;
}

table.neat td {
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

table.neat tr:nth-child(even) td { background: rgba(241, 236, 254, 0.45); }

/* ---------- Checkpoint checklist ---------- */

.checkpoint {
  background: linear-gradient(120deg, rgba(254, 243, 199, 0.65), rgba(255, 237, 213, 0.55));
  border: 1.5px solid rgba(245, 158, 11, 0.45);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin: 1.4rem 0;
  box-shadow: var(--shadow);
}

.checkpoint h3 { margin-top: 0; color: var(--accent-deep); }

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.45rem 0;
  cursor: pointer;
  font-size: 1rem;
}

.check-item input {
  width: 1.35rem;
  height: 1.35rem;
  accent-color: var(--good);
  flex: none;
  margin-top: 0.1rem;
  cursor: pointer;
}

.check-item input:checked + span { color: var(--good); text-decoration: line-through; }

.checkpoint .done-msg {
  display: none;
  font-weight: 700;
  color: var(--good);
  margin-top: 0.5rem;
}

.checkpoint.all-done .done-msg { display: block; }

/* ---------- Quiz ---------- */

.quiz {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1.5px solid rgba(109, 40, 217, 0.32);
  border-radius: var(--radius);
  padding: 1.2rem 1.25rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
}

.quiz h3 { margin-top: 0; }

.quiz .q {
  margin: 1.1rem 0;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}

.quiz .q:last-of-type { border-bottom: none; }

.quiz .q-text { font-weight: 700; margin-bottom: 0.5rem; }

.quiz .opt {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.5rem 0.7rem;
  margin: 0.35rem 0;
  border: 1.5px solid rgba(33, 28, 51, 0.14);
  border-radius: 12px;
  cursor: pointer;
  font-size: 0.98rem;
  background: rgba(255, 255, 255, 0.55);
}

.quiz .opt:hover { border-color: var(--primary); background: var(--teal-soft); }
.quiz .opt input { accent-color: var(--primary); margin-top: 0.2rem; flex: none; }
.quiz .opt.correct { border-color: var(--good); background: var(--good-soft); }
.quiz .opt.wrong { border-color: var(--bad); background: var(--bad-soft); }

.quiz .explain {
  display: none;
  font-size: 0.92rem;
  background: var(--teal-soft);
  border-left: 4px solid var(--primary);
  border-radius: 0 10px 10px 0;
  padding: 0.5rem 0.8rem;
  margin-top: 0.5rem;
}

.quiz.checked .explain { display: block; }

.quiz-result {
  display: none;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  padding: 0.8rem 1rem;
  border-radius: 12px;
  margin-top: 1rem;
}

.quiz-result.pass { display: block; background: var(--good-soft); color: var(--good); }
.quiz-result.fail { display: block; background: var(--bad-soft); color: var(--bad); }

/* ---------- Callouts ---------- */

.callout {
  border-radius: 14px;
  padding: 0.9rem 1.1rem;
  margin: 1rem 0;
  border-left: 5px solid var(--primary);
  background: var(--teal-soft);
}

.callout.warn { border-left-color: var(--margin-red); background: var(--bad-soft); }
.callout.tip { border-left-color: var(--accent-deep); background: var(--accent-soft); }
.callout .label {
  display: block;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.2rem;
  color: var(--primary-deep);
}
.callout.warn .label { color: var(--bad); }
.callout.tip .label { color: var(--accent-deep); }

/* ---------- Progress dashboard ---------- */

.progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.9rem;
  margin: 1.2rem 0;
}

.progress-card {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 0.9rem 1rem;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  gap: 0.8rem;
  align-items: center;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.progress-card:hover { border-color: var(--primary); transform: translateY(-2px); }

.progress-card .pnum {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--teal-soft);
  color: var(--primary-deep);
  flex: none;
}

.progress-card.done .pnum { background: var(--grad); color: #fff; box-shadow: var(--glow); }

.progress-card .ptitle { font-weight: 700; font-size: 0.95rem; line-height: 1.3; }
.progress-card .pstate { font-size: 0.8rem; color: var(--ink-soft); }
.progress-card.done .pstate { color: var(--good); font-weight: 700; }

.progress-bar-outer {
  background: rgba(109, 40, 217, 0.1);
  border-radius: 999px;
  height: 14px;
  overflow: hidden;
  margin: 0.6rem 0;
}

.progress-bar-inner {
  height: 100%;
  background: var(--grad);
  border-radius: 999px;
  width: 0%;
  transition: width 0.6s ease;
}

/* ---------- Schedule timeline ---------- */

.timeline { list-style: none; padding: 0; margin: 1rem 0; }

.timeline li {
  display: flex;
  gap: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--rule);
  align-items: baseline;
}

.timeline .t-time {
  font-weight: 800;
  font-family: var(--font-display);
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  min-width: 6.2rem;
  font-size: 0.92rem;
  flex: none;
}

.timeline .t-break { color: var(--ink-soft); font-style: italic; }

/* ---------- Details / collapsible ---------- */

details.session {
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  margin: 0.8rem 0;
  overflow: hidden;
}

details.session summary {
  cursor: pointer;
  padding: 0.9rem 1.1rem;
  font-weight: 700;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--ink);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

details.session summary::-webkit-details-marker { display: none; }

details.session summary::before {
  content: "+";
  font-size: 1.35rem;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  width: 1.4rem;
  flex: none;
  font-weight: 800;
}

details.session[open] summary::before { content: "–"; }
details.session[open] summary { border-bottom: 1px dashed var(--rule); }
details.session .session-body { padding: 0.4rem 1.2rem 1.2rem; }

.say {
  font-style: italic;
  background: var(--teal-soft);
  border-left: 4px solid #c026d3;
  padding: 0.6rem 0.9rem;
  border-radius: 0 12px 12px 0;
  margin: 0.7rem 0;
}
.say::before { content: "Say: "; font-weight: 800; font-style: normal; color: #a21caf; }

/* ---------- Demo guide ---------- */

.toc-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1rem 0 1.5rem;
}

.toc-chips a {
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  border: 1.5px solid rgba(109, 40, 217, 0.28);
  color: var(--primary-deep);
}

.toc-chips a:hover { background: var(--grad); color: #fff; border-color: transparent; }

.demo {
  border-top: 2px solid transparent;
  border-image: var(--grad) 1;
  margin-top: 3rem;
  padding-top: 1.2rem;
}

.demo .demo-chips { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.4rem 0 0.8rem; }

.demo h2 { margin-top: 0.4rem; }

/* ---------- Footer ---------- */

.site-footer {
  background:
    radial-gradient(30rem 14rem at 90% -30%, rgba(192, 38, 211, 0.25), transparent 60%),
    #1c1440;
  color: var(--chalk-dim);
  padding: 2rem 1rem 2.5rem;
  margin-top: 3rem;
  font-size: 0.9rem;
}

.site-footer .inner { max-width: 62rem; margin: 0 auto; }
.site-footer a { color: #fbbf24; }
.site-footer .disclaimer {
  border-top: 1px solid rgba(246, 243, 255, 0.16);
  margin-top: 1rem;
  padding-top: 1rem;
}

/* ---------- Prev / next ---------- */

.pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

/* ---------- Baseline form ---------- */

.baseline-field { margin: 0.8rem 0; }
.baseline-field label { display: block; font-weight: 700; font-size: 0.95rem; margin-bottom: 0.25rem; }
.baseline-field input, .baseline-field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.62rem 0.85rem;
  border: 1.5px solid rgba(33, 28, 51, 0.18);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
}
.baseline-field input:focus, .baseline-field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.18);
}

.save-note { font-size: 0.88rem; color: var(--good); font-weight: 700; display: none; }

/* ---------- Framework letter cards ---------- */

.framework { display: grid; gap: 0.7rem; margin: 1.2rem 0; }

.framework .fw-item {
  display: flex;
  gap: 0.9rem;
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 0.8rem 1rem;
  box-shadow: var(--shadow);
  align-items: flex-start;
}

.framework .fw-letter {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.6rem;
  color: #fff;
  background: var(--grad);
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  flex: none;
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
}

.framework .fw-item strong { display: block; color: var(--ink); font-family: var(--font-display); }
.framework .fw-item p { margin: 0.15rem 0 0; font-size: 0.95rem; color: var(--ink-soft); }

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  body { font-size: 1rem; }
  .module-head { gap: 0.8rem; }
  .module-num { font-size: 2rem; padding: 0.5rem 0.7rem; }
  .board { padding: 1.15rem 1.05rem; }
  .site-nav a { padding: 0.35rem 0.5rem; font-size: 0.85rem; }
  .timeline .t-time { min-width: 5.2rem; }
}

@media print {
  .site-header, .site-footer, .pager, .copy-btn, .quiz button { display: none; }
  body { background: #fff; }
  body::before { display: none; }
  .card, .board, .quiz, .prompt-card { box-shadow: none; }
  h1 { color: #37246b; -webkit-text-fill-color: initial; background: none; }
}