/*
 * 9Reading — IELTS Reading Practice Landing Page
 * Stylesheet for landing page template
 */

:root {
  --bg: #FBFAF6;
  --bg-2: #F4EFE2;
  --bg-3: #E8E0CB;
  --ink: #1A1816;
  --ink-2: #2D2A26;
  --mute: #6B6258;
  --mute-2: #948B7E;
  --accent: #C8442C;
  --accent-dark: #A23420;
  --highlight: #FFE34A;
  --green: #2F5D3A;
  --rule: rgba(26, 24, 22, 0.10);
  --rule-2: rgba(26, 24, 22, 0.18);
}

.nine-reading-landing,
.nine-reading-landing *,
.nine-reading-landing *::before,
.nine-reading-landing *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
.nine-reading-landing {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 28px; }
.container-narrow { max-width: 820px; margin: 0 auto; padding: 0 28px; }

/* ============ TYPOGRAPHY UTILITIES ============ */
.italic-serif {
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-weight: 400;
  font-variation-settings: "opsz" 36;
  letter-spacing: 0;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--mute);
  margin-bottom: 16px;
  letter-spacing: 0.005em;
}
.kicker::before {
  content: '';
  width: 22px;
  height: 1px;
  background: var(--accent);
}

h1.display {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.028em;
  color: var(--ink);
}
h1.display .italic-serif {
  font-size: 1.05em;
  font-weight: 400;
  letter-spacing: -0.01em;
}

h2.display {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.022em;
  color: var(--ink);
  max-width: 760px;
}
h2.display .italic-serif {
  font-size: 1.05em;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--accent);
}

.nine-reading-landing h3 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.012em;
  line-height: 1.25;
}
.nine-reading-landing h3 .italic-serif {
  font-weight: 500;
  color: var(--accent);
}

.lead {
  font-size: 16px;
  color: var(--mute);
  line-height: 1.6;
  max-width: 600px;
  margin-top: 16px;
}

/* Highlighter — signature element */
.mark {
  position: relative;
  display: inline-block;
  z-index: 0;
  white-space: nowrap;
}
.mark::before {
  content: '';
  position: absolute;
  left: -2px;
  right: -2px;
  bottom: 8%;
  height: 38%;
  background: var(--highlight);
  z-index: -1;
  transform: skewX(-3deg) rotate(-0.6deg);
}
.mark.thick::before { height: 55%; bottom: 4%; }
.mark.coral::before { background: rgba(200, 68, 44, 0.20); }

/* ============ SECTIONS ============ */
.nine-reading-landing section { padding: 80px 0; position: relative; }

/* ============ HERO ============ */
.hero { padding: 60px 0 70px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.45fr 1fr;
  gap: 48px;
  align-items: center;
}
.hero-grid > div { min-width: 0; }
.hero h1 { margin: 6px 0 22px; }
.hero-sub {
  font-size: 16px;
  color: var(--mute);
  line-height: 1.6;
  max-width: 480px;
  margin-bottom: 28px;
}
.hero-sub strong { color: var(--ink); font-weight: 600; }
.hero-ctas {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.hero-trust {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  color: var(--mute);
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}
.hero-trust .avatars { display: flex; }
.hero-trust .avatar {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: white;
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 10px;
  border: 2px solid var(--bg);
  margin-left: -7px;
}
.hero-trust .avatar:first-child { margin-left: 0; }
.hero-trust .avatar.b { background: var(--green); }
.hero-trust .avatar.c { background: var(--ink); }
.hero-trust .avatar.d { background: var(--accent-dark); }

/* Dashboard preview */
.dashboard-wrap { position: relative; }
.dashboard {
  background: white;
  border: 1px solid var(--rule-2);
  border-radius: 14px;
  padding: 22px;
  position: relative;
  box-shadow: 0 24px 48px -20px rgba(26,24,22,0.18);
}
.db-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 14px;
}
.db-head h3 { font-size: 14px; font-weight: 700; }
.db-head .live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10.5px;
  color: var(--mute);
  font-weight: 500;
  letter-spacing: 0.06em;
}
.db-head .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.db-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
}
.db-row .name { font-size: 12.5px; font-weight: 500; }
.db-row .name .badge {
  display: inline-block;
  margin-left: 5px;
  padding: 1px 6px;
  font-size: 9px;
  background: rgba(200, 68, 44, 0.12);
  color: var(--accent);
  border-radius: 3px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}
.db-row .meter {
  display: flex;
  align-items: center;
  gap: 10px;
}
.db-row .bar { width: 110px; height: 4px; background: var(--bg-3); border-radius: 2px; overflow: hidden; }
.db-row .bar-fill { height: 100%; background: var(--ink); border-radius: 2px; }
.db-row .bar-fill.weak { background: var(--accent); }
.db-row .bar-fill.mid { background: #D88A2A; }
.db-row .pct { font-size: 11px; color: var(--mute); width: 30px; text-align: right; font-weight: 500; }
.db-foot {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  font-size: 11.5px;
  color: var(--mute);
  display: flex;
  justify-content: space-between;
}
.db-foot strong { color: var(--ink); font-weight: 600; }
.db-tip {
  margin-top: 10px;
  padding: 11px 13px;
  background: var(--bg-2);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--ink-2);
}
.db-tip strong { color: var(--accent); }

/* Sticky note */
.sticky-note {
  position: absolute;
  top: -14px;
  right: -16px;
  background: var(--highlight);
  padding: 8px 14px;
  font-size: 11px;
  font-weight: 700;
  transform: rotate(3deg);
  box-shadow: 3px 5px 0 rgba(26,24,22,0.12);
  z-index: 2;
  border-radius: 2px;
}

/* ============ INSIGHT (DARK) ============ */
.insight-section {
  background: var(--ink);
  color: var(--bg);
  padding: 90px 0;
}
.insight-section .kicker { color: var(--mute-2); }
.insight-section .kicker::before { background: var(--highlight); }
.insight-section h2.display { color: var(--bg); }
.insight-section h2.display .italic-serif { color: var(--highlight); }

.insight-quote {
  margin-top: 26px;
  padding-left: 22px;
  border-left: 3px solid var(--highlight);
  max-width: 660px;
}
.insight-quote p {
  font-size: 15.5px;
  line-height: 1.6;
  color: rgba(251, 250, 246, 0.82);
}

.path-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  margin-top: 50px;
  border-top: 1px solid rgba(251, 250, 246, 0.12);
  padding-top: 36px;
}
.path-mini-label {
  font-size: 11px;
  color: var(--mute-2);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
  font-weight: 600;
}
.path-mini-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--bg);
}
.path-mini-title .italic-serif { color: var(--highlight); font-size: 1.05em; }

/* ============ PROBLEM ============ */
.problem-list {
  margin-top: 44px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px 56px;
}
.problem-item {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 16px;
}
.problem-num {
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-weight: 400;
  font-size: 26px;
  color: var(--accent);
  line-height: 1;
}
.problem-quote {
  font-size: 16px;
  line-height: 1.5;
  font-weight: 500;
  margin-bottom: 10px;
  color: var(--ink);
}
.problem-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--mute);
}
.problem-tag::before {
  content: '→';
  color: var(--accent);
  font-weight: 600;
}
.problem-tag em {
  font-family: 'Newsreader', serif;
  font-style: italic;
  color: var(--green);
  font-weight: 500;
}

/* ============ SOLUTION / 3 PHASES ============ */
.phases-section { background: var(--bg-2); }
.phases-wrap {
  margin-top: 44px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}
.phase-box {
  background: var(--bg);
  border: 1px solid var(--rule-2);
  border-radius: 14px;
  padding: 26px 24px;
  transition: transform 0.25s, box-shadow 0.25s;
}
.phase-box:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px -16px rgba(26,24,22,0.15);
}
.phase-step {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 600;
}
.phase-step .n {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--accent); color: white;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 12px;
  letter-spacing: 0;
}
.phase-box:nth-child(2) .phase-step { color: #B87015; }
.phase-box:nth-child(2) .phase-step .n { background: #D88A2A; }
.phase-box:nth-child(3) .phase-step { color: var(--green); }
.phase-box:nth-child(3) .phase-step .n { background: var(--green); }

.phase-box h3 { margin-bottom: 12px; }
.phase-box p {
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.6;
}
.phase-box .term {
  display: inline-block;
  margin-top: 14px;
  padding: 3px 9px;
  background: var(--bg-2);
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-size: 12px;
  color: var(--ink-2);
  border-radius: 4px;
}

/* ============ WHY IT WORKS / SCIENCE ============ */
.science-section { background: var(--ink); color: var(--bg); }
.science-section .kicker { color: var(--mute-2); }
.science-section .kicker::before { background: var(--highlight); }
.science-section h2.display { color: var(--bg); }
.science-section h2.display .italic-serif { color: var(--highlight); }
.science-section .lead { color: rgba(251, 250, 246, 0.7); }

.principles-grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid rgba(251, 250, 246, 0.12);
}
.principle-cell {
  padding: 28px 0;
  border-bottom: 1px solid rgba(251, 250, 246, 0.12);
}
.principle-cell:nth-child(odd) { padding-right: 36px; border-right: 1px solid rgba(251, 250, 246, 0.12); }
.principle-cell:nth-child(even) { padding-left: 36px; }

.principle-mark {
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-size: 13px;
  color: var(--highlight);
  margin-bottom: 10px;
  display: inline-block;
}
.principle-cell h4 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.012em;
  margin-bottom: 4px;
  line-height: 1.25;
}
.principle-cite {
  font-size: 11.5px;
  color: var(--mute-2);
  margin-bottom: 12px;
  font-weight: 500;
}
.principle-cell p {
  font-size: 13.5px;
  color: rgba(251, 250, 246, 0.7);
  line-height: 1.6;
}
.principle-cell p em {
  font-family: 'Newsreader', serif;
  font-style: italic;
  color: var(--highlight);
  font-weight: 400;
}

.science-foot {
  margin-top: 36px;
  text-align: center;
}
.science-foot a {
  color: var(--highlight);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 227, 74, 0.4);
  padding-bottom: 2px;
}
.science-foot a:hover { border-bottom-color: var(--highlight); }

/* ============ DEMO ============ */
.demo-mock {
  margin-top: 44px;
  background: white;
  border: 1px solid var(--rule-2);
  border-radius: 16px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  box-shadow: 0 24px 48px -24px rgba(26,24,22,0.18);
}
.demo-passage {
  padding: 32px 36px;
  border-right: 1px solid var(--rule);
  background: white;
}
.demo-passage-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--mute);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.demo-passage-tag::before {
  content: '';
  display: inline-block;
  width: 16px; height: 1px;
  background: var(--accent);
}
.demo-passage h5 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.012em;
  margin-bottom: 14px;
  line-height: 1.3;
}
.demo-passage p {
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--ink-2);
  margin-bottom: 10px;
}
.demo-passage .hl-yellow {
  background: linear-gradient(180deg, transparent 5%, rgba(255, 227, 74, 0.65) 5%, rgba(255, 227, 74, 0.65) 92%, transparent 92%);
  padding: 1px 4px;
  color: var(--ink);
  font-weight: 500;
  border-radius: 2px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.demo-feedback {
  padding: 32px 30px;
  background: linear-gradient(135deg, rgba(200, 68, 44, 0.025) 0%, rgba(255, 227, 74, 0.04) 100%);
}
.demo-feedback-header {
  font-size: 11px;
  letter-spacing: 0.15em;
  font-weight: 700;
  color: var(--mute);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.demo-question-card {
  background: white;
  border: 1.5px solid rgba(200, 68, 44, 0.18);
  border-radius: 12px;
  padding: 22px;
  box-shadow: 0 4px 12px -6px rgba(200, 68, 44, 0.15);
}
.demo-q-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.demo-q-num {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  width: 22px;
}
.demo-q-status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 5px;
}
.demo-q-status.incorrect {
  background: rgba(200, 68, 44, 0.10);
  color: var(--accent);
}
.demo-q-status .x {
  font-weight: 700;
}
.demo-q-stem {
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 14px;
}
.demo-answer-row {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  font-size: 12.5px;
}
.demo-answer-label {
  color: var(--mute);
  font-weight: 500;
}
.demo-answer-pill {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 5px;
  font-weight: 600;
  font-size: 12px;
}
.demo-answer-pill.wrong {
  background: white;
  border: 1px solid rgba(26, 24, 22, 0.18);
  color: var(--ink);
}
.demo-answer-pill.right {
  background: rgba(47, 93, 58, 0.13);
  color: var(--green);
  border: 1px solid rgba(47, 93, 58, 0.2);
}
.demo-answer-arrow {
  color: var(--accent);
  font-weight: 600;
}
.demo-toggle {
  background: none;
  border: none;
  color: var(--ink);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  margin-bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: inherit;
  text-decoration: underline;
  text-decoration-color: rgba(26,24,22,0.25);
  text-underline-offset: 3px;
}
.demo-toggle:hover { color: var(--accent); }

.demo-explanation-box {
  background: linear-gradient(180deg, rgba(247, 240, 224, 0.75) 0%, rgba(247, 240, 224, 0.45) 100%);
  border-radius: 8px;
  padding: 16px 18px;
  border-left: 3px solid var(--green);
}
.demo-exp-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: -0.005em;
}
.demo-exp-title .not-given {
  color: var(--green);
  font-weight: 700;
}
.demo-exp-text {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-2);
  margin-bottom: 8px;
}
.demo-exp-text:last-of-type { margin-bottom: 0; }
.demo-inline-hl {
  background: rgba(255, 227, 74, 0.5);
  padding: 2px 7px;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink);
  border: 1px solid rgba(184, 112, 21, 0.25);
  white-space: nowrap;
  display: inline-block;
  margin: 0 1px;
}
.demo-exp-text strong {
  color: var(--ink);
  font-weight: 700;
}
.demo-support {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed rgba(26, 24, 22, 0.15);
  font-size: 11.5px;
  color: var(--mute);
  display: flex;
  align-items: center;
  gap: 6px;
}
.demo-support .pin { color: var(--accent); font-size: 12px; }
.demo-support .sentence-ref {
  background: rgba(47, 93, 58, 0.12);
  color: var(--green);
  padding: 2px 7px;
  border-radius: 3px;
  font-weight: 700;
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
}

/* ============ DIFFERENTIATOR ============ */
.compare-section { background: var(--bg-2); }
.compare-table {
  margin-top: 44px;
  background: var(--bg);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--rule-2);
}
.compare-row {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  border-bottom: 1px solid var(--rule);
}
.compare-row:last-child { border-bottom: none; }
.compare-row.head {
  background: var(--ink);
  color: var(--bg);
}
.compare-row.head .compare-cell {
  font-weight: 600;
  font-size: 13px;
  padding-top: 28px;
  padding-bottom: 14px;
}
.compare-row.head .featured-col {
  background: var(--accent);
  position: relative;
}
.compare-row.head .featured-col::before {
  content: 'Đề xuất';
  position: absolute;
  top: 7px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--highlight);
  color: var(--ink);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 100px;
  letter-spacing: 0.02em;
  line-height: 1.5;
  white-space: nowrap;
}
.compare-cell {
  padding: 14px 18px;
  border-right: 1px solid var(--rule);
  font-size: 12.5px;
}
.compare-cell:last-child { border-right: none; }
.compare-cell.criterion { font-weight: 600; color: var(--ink); }
.compare-cell .check { color: var(--green); font-weight: 600; }
.compare-cell .nope { color: var(--mute-2); }
.compare-cell .partial { color: #B87015; }
.featured-col { background: rgba(200, 68, 44, 0.04); font-weight: 500; }

/* ============ SOCIAL PROOF ============ */
.proof-stats {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  padding: 32px 0;
  border-top: 1px solid var(--rule-2);
  border-bottom: 1px solid var(--rule-2);
  margin-bottom: 44px;
}
.stat .big {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1;
  color: var(--ink);
  margin-bottom: 8px;
}
.stat .big sup { font-size: 20px; color: var(--accent); }
.stat .desc { font-size: 12.5px; color: var(--mute); line-height: 1.5; }

.testimonials {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.test-card {
  background: var(--bg);
  border: 1px solid var(--rule-2);
  border-radius: 14px;
  padding: 26px;
}
.test-card .scores {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 12.5px;
  font-weight: 600;
}
.test-card .scores .before {
  color: var(--mute);
  text-decoration: line-through;
  text-decoration-color: rgba(107, 98, 88, 0.4);
}
.test-card .scores .after {
  color: var(--accent);
  font-size: 14px;
}
.test-card .scores .arr { color: var(--mute-2); font-weight: 400; }
.test-card .scores .dur {
  margin-left: auto;
  padding: 3px 9px;
  background: var(--bg-2);
  border-radius: 100px;
  font-size: 10.5px;
  color: var(--mute);
  font-weight: 500;
}
.test-card .quote {
  font-size: 14.5px;
  line-height: 1.55;
  margin-bottom: 18px;
  color: var(--ink-2);
}
.test-card .quote em {
  font-family: 'Newsreader', serif;
  font-style: italic;
  color: var(--accent);
}
.test-card .author {
  display: flex;
  align-items: center;
  gap: 11px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}
.test-card .av {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--accent); color: white;
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 13px;
}
.test-card .av.b { background: var(--green); }
.test-card .au-info .name { font-size: 12.5px; font-weight: 600; }
.test-card .au-info .meta { font-size: 11.5px; color: var(--mute); }

/* ============ FAQ ============ */
.faqs { margin-top: 32px; }
.faq {
  border-bottom: 1px solid var(--rule-2);
  padding: 18px 0;
}
.faq summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.008em;
  line-height: 1.4;
  cursor: pointer;
}
.faq summary::-webkit-details-marker { display: none; }
.faq .toggle {
  width: 26px; height: 26px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  flex-shrink: 0;
  transition: all 0.2s;
}
.faq[open] .toggle { background: var(--ink); color: var(--bg); transform: rotate(45deg); }
.faq .answer {
  margin-top: 12px;
  font-size: 14px;
  color: var(--mute);
  line-height: 1.65;
  max-width: 720px;
}
.faq .answer b { color: var(--ink); font-weight: 600; }

/* ============ FINAL CTA ============ */
.final-cta {
  background: var(--ink);
  color: var(--bg);
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}
.final-cta::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(255, 227, 74, 0.13) 0%, transparent 65%);
}
.final-cta::after {
  content: '';
  position: absolute;
  bottom: -120px;
  left: -100px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(200, 68, 44, 0.16) 0%, transparent 65%);
}
.final-cta-content { position: relative; text-align: center; z-index: 1; }
.final-cta .kicker { color: var(--mute-2); justify-content: center; }
.final-cta .kicker::before { background: var(--highlight); }
.final-cta h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.022em;
  max-width: 720px;
  margin: 0 auto 28px;
  color: var(--bg);
}
.final-cta h2 .italic-serif { color: var(--highlight); font-size: 1.05em; }
.final-cta h2 .mark::before { background: rgba(255, 227, 74, 0.3); }
.final-cta .reassure {
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute-2);
  margin-top: 24px;
  font-weight: 600;
}
.final-cta .reassure span { color: var(--highlight); margin: 0 10px; }

/* ============ ADAPTIVE LEARNING SECTION ============ */
.adaptive-section {
  padding: 110px 0 100px;
  background: var(--bg);
  border-top: 1px solid var(--rule);
}
.adaptive-flow {
  margin: 56px 0 64px;
  padding: 44px 36px 36px;
  background: var(--bg-2);
  border-radius: 14px;
  border: 1px solid var(--rule);
}
.adaptive-flow-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.adaptive-flow svg {
  width: 100%;
  height: auto;
  display: block;
}
.adaptive-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.adaptive-card {
  padding: 32px 32px 28px;
  background: var(--bg);
  border: 1px solid var(--rule-2);
  border-radius: 12px;
  transition: border-color 0.2s, transform 0.2s;
  position: relative;
}
.adaptive-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.adaptive-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}
.adaptive-card h4 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.014em;
  line-height: 1.25;
  margin-bottom: 14px;
  color: var(--ink);
}
.adaptive-card h4 em {
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-weight: 500;
  color: var(--accent);
}
.adaptive-card > p {
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ink-2);
  margin-bottom: 18px;
}
.adaptive-card > p em {
  font-family: 'Newsreader', serif;
  font-style: italic;
  color: var(--accent);
  font-weight: 500;
}
.adaptive-card > p strong {
  color: var(--ink);
  font-weight: 600;
}
.adaptive-detail {
  font-size: 13px;
  color: var(--mute);
  line-height: 1.55;
  padding-top: 16px;
  border-top: 1px dashed var(--rule-2);
}
.adaptive-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-right: 8px;
}
.adaptive-callout {
  margin-top: 48px;
  padding: 28px 36px;
  background: var(--bg-2);
  border-radius: 8px;
  border-left: 3px solid var(--ink);
  display: flex;
  gap: 28px;
  align-items: flex-start;
}
.adaptive-callout-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  white-space: nowrap;
  padding-top: 3px;
  flex-shrink: 0;
}
.adaptive-callout p {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--ink-2);
  flex: 1;
}
.adaptive-callout strong {
  color: var(--ink);
  font-weight: 600;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 980px) {
  .container, .container-narrow { padding: 0 22px; }
  section { padding: 60px 0; }
  .hero { padding: 36px 0 48px; }
  h1.display { font-size: 32px; }
  h2.display { font-size: 26px; }
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .sticky-note { right: 12px; top: -10px; }
  .problem-list { grid-template-columns: 1fr; gap: 28px; }
  .phases-wrap { grid-template-columns: 1fr; }
  .principles-grid { grid-template-columns: 1fr; }
  .principle-cell:nth-child(odd) { padding-right: 0; border-right: none; }
  .principle-cell:nth-child(even) { padding-left: 0; }
  .demo-mock { grid-template-columns: 1fr; }
  .demo-passage { border-right: none; border-bottom: 1px solid var(--rule); }
  .compare-row { grid-template-columns: 1fr; }
  .compare-cell { border-right: none; border-bottom: 1px solid var(--rule); }
  .testimonials { grid-template-columns: 1fr; }
  .proof-stats { grid-template-columns: 1fr; gap: 22px; }
  .final-cta h2 { font-size: 26px; }
  .adaptive-section { padding: 70px 0 70px; }
  .adaptive-flow { padding: 28px 18px 24px; margin: 36px 0 44px; }
  .adaptive-grid { grid-template-columns: 1fr; gap: 16px; }
  .adaptive-card { padding: 24px 22px 22px; }
  .adaptive-card h4 { font-size: 19px; }
  .adaptive-callout {
    flex-direction: column;
    gap: 8px;
    padding: 22px 22px;
  }
}