*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  font-family: var(--font-thai);
  color: var(--fg-1);
  -webkit-font-smoothing: antialiased;
  padding-top: 70px;
}
@keyframes r2de-pulse { 0%,100%{opacity:1} 50%{opacity:.4} }
@keyframes r2de-float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-12px)} }

/* ── Sticky Banner ── */
#sticky-banner {
  position: fixed; top: 0; left: 0; right: 0; z-index: 999;
  background: linear-gradient(90deg, #111 0%, #1e1e1e 100%);
  color: #fff; padding: 0 32px; height: 70px;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 14px; font-weight: 600;
  overflow: hidden;
  transition: height 220ms var(--ease-out), box-shadow 220ms var(--ease-out);
}
#sticky-banner:hover,
#sticky-banner:focus-within {
  height: 380px;
  box-shadow: 0 18px 44px rgba(0,0,0,.35);
}

#sticky-banner .banner-content {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.banner-thumb {
  flex-basis: 0;
  width: 0;
  max-width: 520px;
  max-height: 0;
  margin-top: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: 0 12px 28px rgba(0,0,0,.25);
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition:
    opacity 180ms var(--ease-out),
    transform 180ms var(--ease-out),
    max-height 220ms var(--ease-out),
    margin-top 220ms var(--ease-out);
}
.banner-thumb img { display: block; width: 100%; height: auto; }

#sticky-banner:hover .banner-thumb,
#sticky-banner:focus-within .banner-thumb {
  flex-basis: 100%;
  width: min(520px, 92%);
  max-height: 292px;
  margin-top: 8px;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
#sticky-banner .banner-close {
  background: rgba(255,255,255,.2); border: none; color: #fff;
  padding: 4px 12px; border-radius: 6px; cursor: pointer;
  font-weight: 600; font-size: 12px; flex-shrink: 0;
}
#sticky-banner .banner-close:hover { background: rgba(255,255,255,.3); }

/* ── Countdown ── */
.countdown { display: inline-flex; gap: 6px; font-family: var(--font-display); }
#countdown-preview { display: none !important; }
.cd-box {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: rgba(255,255,255,.18); color: #fff;
  border-radius: 8px; border: 1px solid rgba(255,255,255,.3);
  width: 44px; height: 44px;
}
.cd-box .n { font-size: 18px; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.cd-box .l { font-size: 9px; letter-spacing: .12em; opacity: .7; margin-top: 4px; }
.countdown-lg .cd-box {
  width: 72px; height: 72px; background: var(--mascot-ink);
  border-radius: 12px; border: none;
}
.countdown-lg .cd-box .n { font-size: 32px; }
.countdown-lg .cd-box .l { font-size: 10px; }
.countdown-lg { gap: 10px; }

/* ── Header ── */
#site-header {
  position: sticky; top: 70px; z-index: 50;
  background: rgba(253,252,251,.92); backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent; transition: border-color 200ms;
  padding: 10px 28px; display: flex; align-items: center; gap: 28px;
}
#site-header.scrolled { border-bottom-color: var(--border-1); }
#site-header .logo-link { display: flex; align-items: center; text-decoration: none; }
#site-header .logo-link img { height: 34px; }
#site-header nav { display: flex; gap: 4px; margin-left: 20px; }
#site-header nav a {
  padding: 8px 12px; border-radius: 10px; font-size: 14px; font-weight: 600;
  color: var(--fg-2); text-decoration: none; transition: all 150ms;
}
#site-header nav a:hover { color: var(--brand-purple); background: var(--purple-50); }
#site-header .spacer { flex: 1; }
.header-cta {
  background: var(--brand-red); color: #fff; border-radius: 999px;
  padding: 10px 20px; font-weight: 700; font-size: 14px;
  box-shadow: var(--shadow-red); text-decoration: none;
  font-family: var(--font-display);
}

/* ── Buttons ── */
.btn {
  font-family: var(--font-display); font-weight: 700; border: none;
  border-radius: 999px; cursor: pointer; transition: all 150ms var(--ease-out);
  text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary { background: var(--brand-red); color: #fff; box-shadow: 0 10px 30px rgba(222,45,55,.28); }
.btn-primary:hover { transform: translateY(-2px); filter: brightness(1.05); }
.btn-outline { background: transparent; color: var(--brand-purple); border: 2px solid var(--brand-purple); }
.btn-xl { padding: 20px 36px; font-size: 17px; }
.btn-lg { padding: 16px 30px; font-size: 16px; }

/* ── Eyebrow ── */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--brand-red);
  font-family: var(--font-display);
}
.eyebrow::before {
  content: ''; display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: currentColor;
}

/* ── Sticker card ── */
.sticker {
  border: 2px solid var(--mascot-ink); border-radius: 16px;
  box-shadow: var(--shadow-stamp); background: #fff;
}

/* ── HERO ── */
#hero {
  position: relative; padding: 60px 32px;
  background: linear-gradient(180deg,#FBF7F2 0%,#FDFCFB 100%); overflow: hidden;
}
.hero-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.15fr 1fr;
  gap: 48px; align-items: center; position: relative;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: #fff; border: 2px solid var(--mascot-ink);
  box-shadow: 3px 3px 0 var(--mascot-ink); padding: 8px 16px;
  border-radius: 999px; margin-bottom: 26px;
  font-size: 12px; font-weight: 700; letter-spacing: .06em;
  font-family: var(--font-display);
}
.hero-badge .pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--brand-red); animation: r2de-pulse 1.5s infinite;
  flex-shrink: 0;
}
#hero h1 {
  font-family: var(--font-display); font-weight: 800; font-size: 68px;
  line-height: 1.04; letter-spacing: -.025em; margin: 0 0 22px; color: var(--fg-1);
}
.hero-year { font-size: 36px; font-weight: 700; color: var(--fg-3); margin-left: 14px; }
.underline-red { color: var(--brand-red); position: relative; display: inline-block; }
.underline-red svg { position: absolute; left: 0; bottom: -6px; width: 100%; }
.hero-desc { font-size: 19px; line-height: 1.6; color: var(--fg-2); max-width: 540px; margin: 0 0 14px; }
.hero-en { font-size: 14px; line-height: 1.55; color: var(--fg-3); max-width: 540px; margin: 0 0 30px; font-style: italic; }
.hero-btns { display: flex; gap: 14px; margin-bottom: 36px; flex-wrap: wrap; }
.hero-countdown-wrap {
  display: flex; align-items: center; gap: 18px; padding: 18px 22px;
  background: rgba(66,20,94,.04); border-radius: 16px;
  border: 1px dashed var(--purple-200); max-width: 560px;
}
.hero-countdown-label {
  font-size: 12px; font-weight: 700; color: var(--brand-purple);
  letter-spacing: .06em; text-transform: uppercase; line-height: 1.3;
}
.hero-mascot-wrap {
  position: relative; display: flex; justify-content: center;
  align-items: center; min-height: 480px;
}
.hero-mascot-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; opacity: .18; }
.hero-mascot { width: 440px; position: relative; filter: drop-shadow(0 24px 40px rgba(66,20,94,.22)); animation: r2de-float 6s ease-in-out infinite; }
.hero-tag {
  position: absolute; font-family: var(--font-display); font-weight: 800;
  border: 2px solid var(--mascot-ink);
}
.hero-tag-year {
  top: 30px; right: 10px; background: var(--star-yellow); color: var(--mascot-ink);
  padding: 10px 18px; border-radius: 999px; transform: rotate(8deg);
  font-size: 14px; box-shadow: 3px 3px 0 var(--mascot-ink);
}
.hero-tag-alumni {
  bottom: 60px; left: 0; background: #fff;
  padding: 10px 16px; border-radius: 12px; transform: rotate(-5deg);
  font-size: 13px; box-shadow: 3px 3px 0 var(--mascot-ink);
}

/* ── Logos ── */
#logos {
  padding: 60px 32px; background: #fff;
  border-top: 1px solid var(--border-1); border-bottom: 1px solid var(--border-1);
}
.logos-label {
  text-align: center; margin-bottom: 32px;
  font-family: var(--font-display); font-size: 12px; font-weight: 700;
  text-transform: uppercase; color: var(--fg-3);
}
.logos-center { display: flex; justify-content: center; }
.logos-center img { max-width: 100%; height: auto; }

/* ── Why DE ── */
#about { padding: 100px 32px; background: var(--paper); position: relative; }
.why-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; margin-bottom: 60px; }
.why-text p { font-size: 17px; line-height: 1.75; color: var(--fg-1); margin-bottom: 18px; }
.why-text p + p { font-size: 16px; color: var(--fg-2); }
.why-sticker {
  background: #fff; border: 2px solid var(--mascot-ink); border-radius: 16px;
  padding: 20px 24px; box-shadow: var(--shadow-stamp); display: flex; gap: 18px; align-items: center;
}
.why-sticker img { width: 70px; flex-shrink: 0; }
.why-sticker .ratio { font-family: var(--font-display); font-weight: 700; font-size: 17px; margin-bottom: 4px; }
.why-sticker .ratio-desc { font-size: 14px; color: var(--fg-2); line-height: 1.55; }
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat-card { background: #fff; border: 1px solid var(--border-1); border-radius: 16px; padding: 20px; box-shadow: var(--shadow-xs); }
.stat-num { font-family: var(--font-display); font-weight: 800; font-size: 36px; line-height: 1; letter-spacing: -.02em; }
.stat-lbl { font-size: 12px; color: var(--fg-2); line-height: 1.5; margin-top: 10px; font-weight: 500; }

/* ── AI Era ── */
#ai-era {
  padding: 100px 32px;
  background: linear-gradient(180deg,#2D1946 0%,#42145E 100%);
  color: #fff; position: relative; overflow: hidden;
}
.ai-header { text-align: center; margin-bottom: 60px; max-width: 700px; margin-left: auto; margin-right: auto; }
.ai-pill {
  display: inline-block; background: rgba(255,255,255,.15); padding: 8px 16px;
  border-radius: 999px; font-size: 12px; font-weight: 700; letter-spacing: .08em;
  margin-bottom: 20px; border: 1px solid rgba(255,255,255,.25);
}
.ai-header h2 {
  font-family: var(--font-display); font-weight: 800; font-size: 48px;
  letter-spacing: -.02em; line-height: 1.1; margin-bottom: 16px;
}
.ai-header p { font-size: 17px; line-height: 1.65; opacity: .9; }
.ai-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; margin-bottom: 40px; }
.ai-card {
  background: rgba(255,255,255,.08); backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.15); border-radius: 16px;
  padding: 28px; display: flex; gap: 16px;
}
.ai-card-icon { font-size: 36px; flex-shrink: 0; }
.ai-card h3 { font-family: var(--font-display); font-weight: 700; font-size: 18px; margin: 0 0 8px; }
.ai-card p { font-size: 15px; line-height: 1.6; opacity: .85; margin: 0; }
.ai-quote {
  background: rgba(255,255,255,.1); border: 2px dashed rgba(255,255,255,.3);
  border-radius: 16px; padding: 32px; text-align: center;
  font-size: 16px; line-height: 1.7;
}

/* ── Audience Tabs ── */
#audience { padding: 100px 32px; background: #fff; border-top: 1px solid var(--border-1); }
.tab-btns { display: flex; justify-content: center; gap: 8px; margin-bottom: 36px; flex-wrap: wrap; }
.tab-btn {
  padding: 12px 22px; border-radius: 999px; border: 2px solid var(--border-1);
  background: #fff; color: var(--fg-1); font-family: var(--font-display);
  font-weight: 700; font-size: 14px; cursor: pointer; transition: all 150ms;
}
.tab-btn.active {
  border-color: var(--mascot-ink); background: var(--mascot-ink);
  color: #fff; box-shadow: 3px 3px 0 var(--brand-red);
}
.tab-panel {
  display: none; background: var(--purple-50); border: 2px solid var(--mascot-ink);
  border-radius: 24px; padding: 40px; box-shadow: 6px 6px 0 var(--mascot-ink);
  grid-template-columns: 1fr 240px; gap: 36px; align-items: center;
}
.tab-panel.active { display: grid; }
.tab-panel h3 { font-family: var(--font-display); font-weight: 800; font-size: 30px; line-height: 1.15; margin: 0 0 14px; letter-spacing: -.02em; }
.tab-panel .tab-desc { font-size: 16px; line-height: 1.65; color: var(--fg-2); margin-bottom: 24px; }
.tab-points { padding: 0; margin: 0; list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; }
.tab-points li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; line-height: 1.55; color: var(--fg-1); font-weight: 500; }
.tab-points li .check { color: var(--success); font-weight: 800; margin-top: 1px; flex-shrink: 0; }
.tab-mascot { width: 240px; justify-self: end; }

/* ── Comparison ── */
#comparison { padding: 100px 32px; background: #fff; border-top: 1px solid var(--border-1); }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 { font-family: var(--font-display); font-weight: 800; font-size: 44px; letter-spacing: -.02em; margin: 12px 0 8px; line-height: 1.1; }
.comparison-wrap { overflow-x: auto; border: 2px solid var(--mascot-ink); border-radius: 16px; box-shadow: 4px 4px 0 var(--mascot-ink); }
.comparison-wrap table { width: 100%; border-collapse: collapse; background: #fff; }
.comparison-wrap thead tr { background: var(--mascot-ink); color: #fff; }
.comparison-wrap th { padding: 20px; text-align: left; font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.comparison-wrap th:nth-child(2) { background: rgba(255,255,255,.15); }
.comparison-wrap th:nth-child(3) { background: var(--brand-purple); }
.comparison-wrap tbody tr { border-top: 1px solid var(--border-1); }
.comparison-wrap tbody tr:nth-child(odd) { background: rgba(66,20,94,.03); }
.comparison-wrap td { padding: 20px; font-size: 14px; line-height: 1.55; }
.comparison-wrap td:first-child { font-size: 15px; font-weight: 600; color: var(--fg-1); min-width: 200px; }
.comparison-wrap td:nth-child(2) { color: var(--fg-2); min-width: 280px; }
.comparison-wrap td:nth-child(3) { color: var(--fg-1); font-weight: 500; min-width: 280px; }
.comparison-note { background: var(--purple-50); border: 2px solid var(--brand-purple); border-radius: 16px; padding: 24px; margin-top: 32px; text-align: center; font-size: 15px; line-height: 1.7; }

/* ── Syllabus ── */
#syllabus { padding: 100px 32px; background: linear-gradient(180deg,var(--paper) 0%,#F6EEFB 100%); position: relative; overflow: hidden; }
.chapter-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-bottom: 36px; }
.chapter-card {
  background: #fff; border: 2px solid var(--mascot-ink); border-radius: 16px;
  padding: 20px; cursor: pointer; box-shadow: 3px 3px 0 var(--mascot-ink);
  transition: all 150ms; position: relative; overflow: hidden;
  min-height: 160px; color: var(--fg-1);
}
.chapter-card.active { box-shadow: 5px 5px 0 var(--mascot-ink); transform: translate(-2px,-2px); color: #fff; }
.chapter-card .c-num { font-family: var(--font-mono); font-size: 11px; font-weight: 700; opacity: .5; letter-spacing: .1em; }
.chapter-card.active .c-num { opacity: .85; }
.chapter-card .c-title { font-family: var(--font-display); font-weight: 700; font-size: 16px; line-height: 1.3; margin-top: 8px; }
.chapter-card .c-mascot { position: absolute; right: -10px; bottom: -10px; width: 70px; opacity: .55; }
.chapter-card.active .c-mascot { opacity: 1; }
.chapter-detail {
  background: #fff; border: 2px solid var(--mascot-ink); border-radius: 20px;
  padding: 36px; box-shadow: 6px 6px 0 var(--mascot-ink);
  display: grid; grid-template-columns: 1fr 280px; gap: 32px; align-items: center;
}
.detail-badge { display: inline-block; color: #fff; padding: 6px 14px; border-radius: 999px; font-family: var(--font-mono); font-size: 12px; font-weight: 700; letter-spacing: .1em; margin-bottom: 14px; }
.chapter-detail h3 { font-family: var(--font-display); font-weight: 800; font-size: 28px; line-height: 1.15; margin: 0 0 8px; letter-spacing: -.015em; }
.chapter-detail p { font-size: 16px; line-height: 1.65; color: var(--fg-2); margin: 0 0 18px; }
.topic-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.topic-tag { background: var(--grey-100); padding: 6px 14px; border-radius: 8px; font-size: 13px; font-weight: 600; color: var(--fg-1); font-family: var(--font-mono); }
.chapter-detail img { width: 240px; justify-self: center; }

/* ── Instructors ── */
#instructors { padding: 100px 32px; background: var(--paper); }
.instructor-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.instructor-card { background: #fff; border: 2px solid var(--mascot-ink); border-radius: 20px; padding: 28px; box-shadow: 5px 5px 0 var(--mascot-ink); display: grid; grid-template-columns: 120px 1fr; gap: 20px; align-items: center; }
.instructor-avatar { width: 120px; height: 120px; border-radius: 50%; display: flex; align-items: center; justify-content: center; overflow: hidden; border: 3px solid var(--mascot-ink); }
.instructor-avatar img { width: 115%; margin-top: 18px; }
.i-name { font-family: var(--font-display); font-weight: 800; font-size: 22px; letter-spacing: -.01em; }
.i-role { font-size: 14px; font-weight: 700; margin-top: 4px; }
.i-tag { font-size: 13px; color: var(--fg-3); margin-top: 2px; font-style: italic; }
.i-bio { font-size: 14px; color: var(--fg-2); line-height: 1.55; margin-top: 12px; }
.instructor-ta { background: #fff; border: 1px dashed var(--border-2); border-radius: 16px; padding: 20px 24px; display: flex; align-items: center; gap: 16px; justify-content: center; text-align: center; }
.instructor-ta img { width: 80px; }

/* ── Schedule ── */
#schedule { padding: 100px 32px; background: #fff; }
.schedule-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; margin-bottom: 40px; }
.schedule-features { display: flex; flex-direction: column; gap: 10px; }
.sched-feat { display: flex; gap: 12px; align-items: center; }
.sched-feat .icon { font-size: 22px; }
.sched-feat .ft { font-size: 15px; font-weight: 600; color: var(--fg-1); }
.sched-feat .fen { font-size: 12px; color: var(--fg-3); font-style: italic; }
.schedule-table { border: 2px solid var(--mascot-ink); border-radius: 16px; overflow: hidden; box-shadow: 5px 5px 0 var(--mascot-ink); }
.sched-head { padding: 14px 20px; background: var(--mascot-ink); color: #fff; display: grid; grid-template-columns: 70px 130px 160px 1fr; gap: 16px; font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.sched-row { padding: 14px 20px; display: grid; grid-template-columns: 70px 130px 160px 1fr; gap: 16px; border-top: 1px solid var(--border-1); background: #fff; align-items: center; }
.sched-row.special { background: #FEECEE; }
.sched-row .wk { font-family: var(--font-mono); font-weight: 700; color: var(--brand-purple); font-size: 14px; }
.sched-row.special .wk { color: var(--brand-red); }
.sched-row .dt { font-size: 13px; color: var(--fg-2); }
.sched-row .tp { font-size: 14px; font-weight: 600; color: var(--fg-1); }
.sched-row .lv { font-size: 12px; color: var(--fg-3); font-family: var(--font-mono); }

/* ── Bonuses ── */
#bonuses { padding: 100px 32px; background: linear-gradient(180deg,#fff 0%,#FBF7F2 100%); }
.bonuses-grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
.bonus-card { background: #fff; border: 2px solid var(--mascot-ink); border-radius: 16px; padding: 22px; box-shadow: 4px 4px 0 var(--mascot-ink); display: flex; flex-direction: column; gap: 8px; }
.bonus-head { display: flex; align-items: center; gap: 12px; margin-bottom: 4px; }
.bonus-icon { width: 44px; height: 44px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 22px; border: 2px solid var(--mascot-ink); flex-shrink: 0; }
.bonus-title { font-family: var(--font-display); font-weight: 800; font-size: 17px; line-height: 1.2; }
.bonus-en { font-size: 11px; color: var(--fg-3); font-style: italic; margin-top: 2px; }
.bonus-desc { font-size: 13.5px; line-height: 1.6; color: var(--fg-2); margin: 0; }

/* ── Summary ── */
#summary { padding: 100px 32px; background: linear-gradient(180deg,#FBF7F2 0%,#FDFCFB 100%); }
.summary-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 16px; margin-bottom: 40px; }
.sum-card { background: #fff; border: 2px solid var(--mascot-ink); border-radius: 12px; padding: 20px; box-shadow: 3px 3px 0 var(--mascot-ink); text-align: center; display: flex; flex-direction: column; gap: 12px; }
.sum-icon { font-size: 32px; }
.sum-card h3 { font-family: var(--font-display); font-weight: 700; font-size: 16px; margin: 0; color: var(--fg-1); line-height: 1.3; }
.sum-card p { font-size: 13px; color: var(--fg-2); line-height: 1.5; margin: 0; flex: 1; }
.sum-cta { background: white; border: 2px solid var(--mascot-ink); border-radius: 16px; padding: 32px; text-align: center; box-shadow: 3px 3px 0 var(--mascot-ink); }
.sum-cta-title { font-family: var(--font-display); font-weight: 700; font-size: 16px; color: var(--fg-1); margin-bottom: 12px; line-height: 1.3; }
.sum-cta p { font-size: 15px; line-height: 1.7; color: var(--fg-2); margin: 0; }

/* ── Testimonials ── */
#testimonials { padding: 100px 32px; background: var(--paper); position: relative; overflow: hidden; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.tcard { background: #fff; border: 2px solid var(--mascot-ink); border-radius: 16px; padding: 22px; display: flex; flex-direction: column; gap: 14px; }
.tcard:nth-child(even) { box-shadow: 4px 4px 0 var(--brand-red); }
.tcard:nth-child(odd) { box-shadow: 4px 4px 0 var(--mascot-ink); }
.tcard .qmark { font-size: 28px; color: var(--brand-red); font-family: var(--font-display); font-weight: 800; line-height: .5; margin-top: 8px; }
.tcard .qtext { font-size: 14.5px; line-height: 1.65; color: var(--fg-1); margin: 0; flex: 1; }
.tcard .qauthor { display: flex; gap: 12px; align-items: center; padding-top: 12px; border-top: 1px dashed var(--border-1); }
.q-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--purple-50); overflow: hidden; display: flex; align-items: center; justify-content: center; flex-shrink: 0; border: 2px solid var(--mascot-ink); }
.q-avatar img { width: 115%; margin-top: 4px; }
.q-name { font-size: 14px; font-weight: 700; color: var(--fg-1); }
.q-role { font-size: 11px; color: var(--fg-3); line-height: 1.4; }
.q-cohort { font-size: 12px; color: var(--brand-purple); font-weight: 700; letter-spacing: .05em; background: var(--purple-50); padding: 3px 8px; border-radius: 999px; flex-shrink: 0; margin-left: auto; }

.q-avatar::after {
  content: attr(data-initial);
  margin-bottom: 3px;
  margin-left: 2px;
}

/* สีแต่ละคน */
.q-avatar.q-avatar--M { background: #E57373; }
.q-avatar.q-avatar--T { background: #64B5F6; }
.q-avatar.q-avatar--N { background: #81C784; }
.q-avatar.q-avatar--U { background: #FFB74D; }
.q-avatar.q-avatar--C { background: #BA68C8; }
.q-avatar.q-avatar--J { background: #4DB6AC; }

/* ── FAQ ── */
#faq { padding: 100px 32px; background: #fff; }
.faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 880px; margin: 0 auto; }
.faq-item { background: #fff; border: 2px solid var(--mascot-ink); border-radius: 14px; box-shadow: 3px 3px 0 var(--mascot-ink); overflow: hidden; transition: box-shadow 150ms; }
.faq-item.open { box-shadow: 5px 5px 0 var(--brand-red); }
.faq-btn { width: 100%; border: none; background: transparent; cursor: pointer; padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; gap: 16px; text-align: left; }
.faq-q { font-family: var(--font-display); font-weight: 700; font-size: 17px; color: var(--fg-1); line-height: 1.4; }
.faq-icon { width: 36px; height: 36px; border-radius: 50%; background: var(--purple-50); color: var(--brand-purple); display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 800; transition: all 150ms; flex-shrink: 0; }
.faq-item.open .faq-icon { background: var(--brand-red); color: #fff; transform: rotate(45deg); }
.faq-answer { display: none; padding: 16px 24px 22px; color: var(--fg-2); font-size: 15px; line-height: 1.7; white-space: pre-wrap; border-top: 1px dashed var(--border-1); }
.faq-answer a { color: var(--brand-red); text-decoration: underline; }
.faq-item.open .faq-answer { display: block; }

/* ── Enroll ── */
#enroll { padding: 100px 32px; background: linear-gradient(180deg,var(--brand-purple) 0%,var(--purple-700) 100%); color: #fff; position: relative; overflow: hidden; }
.enroll-note a { color: var(--star-yellow); }
.enroll-header { text-align: center; margin-bottom: 40px; }
.enroll-header h2 { font-family: var(--font-display); font-weight: 800; font-size: 50px; letter-spacing: -.02em; margin: 12px 0 14px; line-height: 1.1; }
.enroll-header p { font-size: 17px; opacity: .85; font-style: italic; margin-bottom: 24px; }
.enroll-timer { display: inline-flex; gap: 14px; align-items: center; padding: 16px 24px; background: rgba(0,0,0,.25); border-radius: 999px; border: 1px solid rgba(255,255,255,.2); }
.enroll-timer span { font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; opacity: .8; }
.enroll-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.price-card { border-radius: 24px; padding: 36px; position: relative; }
.price-regular { background: #fff; color: var(--fg-1); border: 3px solid var(--star-yellow); }
.price-student { background: var(--mascot-ink); color: #fff; border: 3px solid var(--brand-red); overflow: hidden; }
.price-tier { font-family: var(--font-display); font-weight: 800; font-size: 14px; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 8px; }
.price-regular .price-tier { color: var(--fg-3); }
.price-student .price-tier { color: var(--star-yellow); }
.price-card h3 { font-family: var(--font-display); font-weight: 800; font-size: 24px; margin: 0 0 18px; letter-spacing: -.01em; }
.price-row { display: flex; align-items: baseline; gap: 12px; margin-bottom: 6px; }
.price-amount { font-family: var(--font-display); font-weight: 800; font-size: 56px; letter-spacing: -.03em; line-height: 1; }
.price-regular .price-amount { color: var(--brand-red); }
.price-student .price-amount { color: var(--star-yellow); }
.price-orig { font-size: 16px; text-decoration: line-through; }
.price-regular .price-orig { color: var(--fg-3); }
.price-student .price-orig { color: rgba(255,255,255,.5); }
.price-save { font-size: 16px; font-weight: 700; margin-bottom: 22px; }
.price-regular .price-save { color: var(--brand-red); }
.price-student .price-save { color: var(--star-yellow); }
.price-features { padding: 0; margin: 0 0 24px; list-style: none; display: flex; flex-direction: column; gap: 8px; }
.price-features li { display: flex; gap: 10px; align-items: flex-start; font-size: 16px; }
.price-regular .price-features li { color: var(--fg-1); }
.price-badge { position: absolute; top: 16px; right: 16px; background: var(--brand-red); color: #fff; padding: 5px 12px; border-radius: 999px; font-size: 11px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.price-btn { display: block; width: 100%; text-align: center; font-family: var(--font-display); font-weight: 700; font-size: 16px; padding: 16px; border-radius: 999px; border: none; cursor: pointer; text-decoration: none; transition: filter 150ms var(--ease-out), transform 150ms var(--ease-out); }
.price-btn-regular { background: var(--brand-red); color: #fff; box-shadow: 0 10px 30px rgba(222,45,55,.28); }
.price-btn-regular:hover { filter: brightness(.9); transform: translateY(-1px); }
.price-btn-student { background: var(--star-yellow); color: var(--mascot-ink); }
.enroll-note { text-align: center; margin-top: 36px; font-size: 16px; opacity: .7; }
.enroll-note u { cursor: pointer; }

/* Student strip (variant B) */
#enroll .student-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-radius: 18px;
  background: rgba(255,255,255,.08);
  border: 2px solid rgba(255,255,255,.28);
  cursor: pointer;
  user-select: none;
}
#enroll .student-strip:focus-visible { outline: 3px solid rgba(245,197,53,.9); outline-offset: 3px; }
.student-strip-title { font-family: var(--font-display); font-weight: 800; letter-spacing: -.01em; font-size: 20px; }
.student-strip-sub { font-weight: 700; opacity: .7; font-size: 12px; margin-left: 6px; }
.student-strip-meta { font-size: 16px; opacity: .9; margin-top: 4px; }
.student-strip-meta-muted { opacity: .6; text-decoration: line-through; margin-left: 6px; }
.student-strip-right { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.student-strip-cta { font-family: var(--font-display); font-weight: 700; font-size: 16px; letter-spacing: .02em; }
.student-strip-msg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,.28);
  background: rgba(0,0,0,.22);
  color: #fff;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 13px;
  white-space: nowrap;
}
.student-strip-msg:hover { filter: brightness(1.08); transform: translateY(-1px); }

/* Student card is secondary; expandable via strip */
#enroll .price-card.price-student { display: none; }
#enroll .price-card.price-student.is-open { display: block; }

/* ── Footer ── */
footer { background: var(--brand-purple); color: #fff; padding: 60px 32px 30px; position: relative; overflow: hidden; }
.footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; position: relative; }
footer img.footer-logo { height: 40px; margin-bottom: 16px; }
.footer-tagline { font-size: 14px; line-height: 1.7; opacity: .85; max-width: 320px; }
.footer-col-head { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; opacity: .6; margin-bottom: 14px; font-weight: 700; }
.footer-link { font-size: 14px; margin-bottom: 10px; opacity: .9; cursor: pointer; display: block; }
.footer-bottom { max-width: 1200px; margin: 40px auto 0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.15); display: flex; justify-content: space-between; font-size: 13px; opacity: .7; position: relative; }

/* ── Sticky CTA ── */
#sticky-cta {
  position: fixed; bottom: 16px; left: 50%;
  transform: translateX(-50%) translateY(120px);
  transition: transform 280ms var(--ease-out);
  z-index: 40; max-width: calc(100vw - 32px);
}
#sticky-cta.visible { transform: translateX(-50%) translateY(0); }
.cta-inner { background: var(--mascot-ink); color: #fff; border-radius: 999px; padding: 10px 12px 10px 22px; display: flex; align-items: center; gap: 16px; box-shadow: 0 18px 40px rgba(0,0,0,.3); border: 2px solid var(--brand-red); }
.cta-label { font-size: 13px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; opacity: .8; white-space: nowrap; }
.cta-btn { background: var(--brand-red); color: #fff; padding: 10px 22px; border-radius: 999px; font-weight: 700; font-size: 14px; text-decoration: none; font-family: var(--font-display); white-space: nowrap; }

/* ══════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════ */

/* ── Tablet (≤1024px) ── */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-mascot-wrap { min-height: 320px; }
  .hero-mascot { width: 300px; }
  #hero h1 { font-size: 52px; }
  .hero-desc { font-size: 17px; }

  .why-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }

  .chapter-grid { grid-template-columns: repeat(2, 1fr); }
  .chapter-detail { grid-template-columns: 1fr; }
  .chapter-detail img { display: none; }

  .instructor-grid { grid-template-columns: 1fr; }

  .schedule-layout { grid-template-columns: 1fr; }
  .schedule-layout > div:last-child { display: none; }

  .bonuses-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: repeat(3, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .enroll-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  .ai-header h2 { font-size: 38px; }
  .section-header h2 { font-size: 36px; }
}

/* ── Mobile (≤768px) ── */
@media (max-width: 768px) {
  body { padding-top: 60px; }

  /* Banner */
  #sticky-banner { height: 60px; padding: 0 16px; gap: 8px; }
  #sticky-banner .banner-content { gap: 8px; }
  #sticky-banner .banner-content span { font-size: 12px; }
  #countdown-preview { display: none; }

  /* Header */
  #site-header { top: 60px; padding: 8px 16px; gap: 12px; }
  #site-header nav { display: none; }
  .header-cta { padding: 8px 14px; font-size: 13px; }

  /* Hero */
  #hero { padding: 40px 20px; }
  #hero h1 { font-size: clamp(42px, 13vw, 60px); }
  .hero-year { font-size: clamp(22px, 6.5vw, 32px); margin-left: 8px; }
  .hero-desc { font-size: 16px; }
  .hero-en { font-size: 13px; }
  .hero-btns { flex-direction: column; }
  .btn-xl { padding: 16px 28px; font-size: 16px; width: 100%; justify-content: center; }
  .hero-mascot-wrap { display: none; }
  .enroll-rabbit { top: -20px !important; }
  .hero-countdown-wrap { max-width: 100%; }
  .countdown-lg .cd-box { width: 56px; height: 56px; }
  .countdown-lg .cd-box .n { font-size: 24px; }
  .countdown-lg { gap: 6px; }

  /* Sections padding */
  #about, #ai-era, #audience, #comparison, #syllabus,
  #instructors, #schedule, #bonuses, #summary,
  #testimonials, #faq, #enroll {
    padding: 60px 20px;
  }
  #logos { padding: 40px 20px; }

  /* Section headers */
  .section-header h2, #about .section-header h2 { font-size: 28px; }
  .ai-header h2 { font-size: 30px; }

  /* Why DE */
  .why-grid { grid-template-columns: 1fr; gap: 28px; }
  .stats-grid { grid-template-columns: 1fr; }
  .why-sticker { flex-direction: column; text-align: center; }
  .why-sticker img { width: 60px; }

  /* AI Era */
  .ai-grid { grid-template-columns: 1fr; gap: 16px; }
  .ai-card { padding: 20px; }
  .ai-card-icon { font-size: 28px; }

  /* Audience tabs */
  .tab-btns { gap: 6px; }
  .tab-btn { padding: 10px 14px; font-size: 13px; }
  .tab-panel { grid-template-columns: 1fr; padding: 28px 20px; }
  .tab-panel img.tab-mascot { display: none; }
  .tab-points { grid-template-columns: 1fr; }
  .tab-panel h3 { font-size: 22px; }

  /* Comparison */
  .comparison-wrap { font-size: 13px; }
  .comparison-wrap th, .comparison-wrap td { padding: 12px 14px; }
  .comparison-wrap td:first-child { min-width: 130px; font-size: 13px; }
  .comparison-wrap td:nth-child(2),
  .comparison-wrap td:nth-child(3) { min-width: 180px; }

  /* Syllabus */
  .chapter-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .chapter-card { min-height: 120px; padding: 14px; }
  .chapter-card .c-title { font-size: 13px; }
  .chapter-detail { padding: 24px 20px; }
  .chapter-detail h3 { font-size: 20px; }

  /* Instructors */
  .instructor-card { grid-template-columns: 80px 1fr; gap: 14px; padding: 20px; }
  .instructor-avatar { width: 80px; height: 80px; }
  .i-name { font-size: 18px; }

  /* Schedule */
  .sched-head { grid-template-columns: 44px 90px 1fr; font-size: 10px; padding: 10px 14px; gap: 10px; }
  .sched-row { grid-template-columns: 44px 90px 1fr; padding: 10px 14px; gap: 10px; }
  .sched-row .lv { display: none; }
  .sched-row .wk { font-size: 12px; }
  .sched-row .dt { font-size: 12px; }
  .sched-row .tp { font-size: 13px; }

  /* Bonuses */
  .bonuses-grid { grid-template-columns: 1fr; }

  /* Summary */
  .summary-grid { grid-template-columns: repeat(2, 1fr); }

  /* Testimonials */
  .testimonials-grid { grid-template-columns: 1fr; }

  /* Enroll */
  #enroll { padding: 60px 20px; }
  .enroll-header h2 { font-size: 32px; }
  .enroll-grid { grid-template-columns: 1fr; gap: 20px; }
  .enroll-timer { flex-direction: column; gap: 8px; padding: 14px 20px; }
  .price-amount { font-size: 44px; }

  /* Footer */
  footer { padding: 40px 20px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  /* Sticky CTA — label + countdown on first row, button on second */
  .cta-inner { padding: 10px 14px; gap: 6px; flex-wrap: wrap; border-radius: 20px; }
  .cta-label { font-size: 11px; letter-spacing: .03em; }
  #countdown-sticky { gap: 4px; }
  #countdown-sticky .cd-box { width: 34px; height: 34px; }
  #countdown-sticky .cd-box .n { font-size: 13px; }
  #countdown-sticky .cd-box .l { font-size: 7px; margin-top: 2px; }
  .cta-btn { padding: 8px 14px; font-size: 13px; flex-basis: 100%; text-align: center; }
}

/* ── Small mobile (≤480px) ── */
@media (max-width: 480px) {
  #hero h1 { font-size: clamp(36px, 12vw, 42px); }
  .chapter-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .instructor-card { grid-template-columns: 1fr; text-align: center; }
  .instructor-avatar { margin: 0 auto; }
  #sticky-banner { height: auto; min-height: 60px; padding: 10px 16px; flex-wrap: wrap; gap: 8px; }
  body { padding-top: 70px; }
  #site-header { top: 70px; }
}