:root {
  --ink: #201f1e;
  --muted: #605e5c;
  --paper: #ffffff;
  --white: #ffffff;
  --navy: #201f1e;
  --blue: #0078d4;
  --cyan: #605e5c;
  --lime: #0078d4;
  --orange: #8a6116;
  --line: #e1dfdd;
  --canvas: #faf9f8;
  --shadow: none;
  --shell: min(1120px, calc(100% - 48px));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "Malgun Gothic", "Noto Sans KR", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.shell { width: var(--shell); margin: 0 auto; }
.skip {
  position: fixed; z-index: 999; left: 12px; top: 12px;
  padding: 8px 12px; background: var(--ink); color: #fff;
  transform: translateY(-160%); border-radius: 2px; font-weight: 600;
}
.skip:focus { transform: translateY(0); }

.header {
  position: sticky; z-index: 100; top: 0;
  background: #fff;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { min-height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.02em; font-size: 16px; white-space: nowrap; color: var(--ink); }
.brand img { width: 28px; height: 28px; border-radius: 4px; }
.brand em { color: var(--ink); font-style: normal; font-weight: 600; }
.nav { display: flex; align-items: center; gap: 20px; color: var(--muted); font-size: 14px; font-weight: 400; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav .nav-cta {
  padding: 6px 14px;
  border-radius: 2px;
  background: var(--blue);
  color: #fff;
  font-weight: 600;
}
.nav .nav-cta:hover { color: #fff; background: #106ebe; }
.menu {
  display: none; width: 40px; height: 40px;
  border: 1px solid var(--line); border-radius: 2px;
  background: #fff; color: var(--ink);
}

.hero {
  position: relative; overflow: hidden;
  padding: 64px 0 48px;
  color: var(--ink);
  background: #fff;
}
.hero::before { display: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.eyebrow {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 0; max-width: 750px;
  font-size: clamp(32px, 4.4vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.03em;
  font-weight: 600;
  color: var(--ink);
}
.hero h1 em { color: var(--ink); font-style: normal; }
.lead { max-width: 680px; margin: 16px 0 0; color: var(--muted); font-size: 16px; word-break: keep-all; }
.lead strong { color: var(--ink); font-weight: 600; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.button {
  min-height: 32px; padding: 0 16px;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border-radius: 2px; font-size: 14px; font-weight: 600;
  border: 1px solid transparent;
  transition: background .15s, border-color .15s, color .15s;
}
.button:hover { transform: none; }
.button.primary { background: var(--blue); color: #fff; }
.button.primary:hover { background: #106ebe; }
.button.ghost { color: var(--ink); border-color: var(--line); background: #fff; }
.button.ghost:hover { background: var(--canvas); }
.button.blue { background: var(--blue); color: #fff; }
.button.blue:hover { background: #106ebe; }
.button.outline { color: var(--ink); border-color: var(--line); background: #fff; }
.button.outline:hover { background: var(--canvas); }
.hero-note { margin: 14px 0 0; color: var(--muted); font-size: 12px; }

.terminal {
  position: relative; padding: 16px;
  border: 1px solid var(--line); border-radius: 4px;
  background: #fff;
  box-shadow: none;
  transform: none;
}
.terminal-head { display: flex; gap: 6px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.terminal-head i { width: 8px; height: 8px; border-radius: 50%; background: #c8c6c4; }
.terminal-head i:nth-child(2) { background: #a19f9d; }
.terminal-head i:nth-child(3) { background: #8a8886; }
.code { margin: 14px 0 0; color: var(--ink); font: 13px/1.8 Consolas, "Cascadia Mono", monospace; }
.code b { color: var(--ink); }
.code em { color: var(--blue); font-style: normal; }
.code span { color: var(--muted); }
.build-flow { margin-top: 16px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.build-flow div {
  padding: 10px 8px; border-radius: 2px;
  background: var(--canvas); border: 1px solid var(--line);
  text-align: center; color: var(--muted); font-size: 11px;
}
.build-flow strong { display: block; color: var(--ink); font-size: 13px; }

.facts {
  position: relative; margin-top: 40px;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line); border-radius: 4px; overflow: hidden;
  background: #fff;
}
.facts div { padding: 16px 18px; border-right: 1px solid var(--line); background: #fff; }
.facts div:last-child { border: 0; }
.facts strong, .facts span { display: block; }
.facts strong { color: var(--ink); font-size: 16px; font-weight: 600; }
.facts span { color: var(--muted); font-size: 12px; }

.section { padding: 72px 0; background: #fff; }
.section.white { background: #fff; }
.section.dark { background: var(--canvas); color: var(--ink); }
.section.soft-blue { background: var(--canvas); }
.section-head { max-width: 760px; }
.section-head h2 {
  margin: 0;
  font-size: clamp(24px, 3.2vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.03em;
  font-weight: 600;
  color: var(--ink);
}
.section-head p:last-child { margin: 14px 0 0; color: var(--muted); word-break: keep-all; }
.dark .section-head p:last-child { color: var(--muted); }

.course-pair { margin-top: 36px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.course-card {
  position: relative; overflow: hidden; min-height: 0;
  padding: 24px;
  border: 1px solid var(--line); border-radius: 4px;
  background: #fff; box-shadow: none;
}
.course-card::before { display: none; }
.course-card.advanced { color: var(--ink); background: #fff; border-color: var(--line); }
.course-card.advanced::before { display: none; }
.course-tag {
  display: inline-flex; padding: 2px 8px; border-radius: 2px;
  color: var(--ink); background: var(--canvas);
  border: 1px solid var(--line);
  font-size: 12px; font-weight: 600;
}
.advanced .course-tag { color: var(--ink); background: var(--canvas); }
.course-card h3 { position: relative; margin: 16px 0 10px; font-size: 22px; line-height: 1.3; letter-spacing: -0.02em; font-weight: 600; }
.course-card > p { color: var(--muted); }
.advanced > p { color: var(--muted); }
.course-meta { margin: 20px 0; display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.advanced .course-meta { border-color: var(--line); }
.course-meta div { padding: 12px 0; }
.course-meta span, .course-meta strong { display: block; }
.course-meta span { color: var(--muted); font-size: 11px; }
.advanced .course-meta span { color: var(--muted); }
.course-list { margin: 0 0 20px; padding: 0; list-style: none; }
.course-list li { margin: 8px 0; display: flex; gap: 8px; font-size: 14px; }
.course-list li::before { content: "✓"; color: #107c10; font-weight: 700; }
.advanced .course-list li::before { color: #107c10; }

.method-grid {
  margin-top: 36px; display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0; background: transparent;
  border: 1px solid var(--line); border-radius: 4px; overflow: hidden;
}
.method-grid article { min-height: 0; padding: 20px; background: #fff; border-right: 1px solid var(--line); }
.method-grid article:last-child { border-right: 0; }
.method-grid b { color: var(--muted); font-size: 12px; letter-spacing: 0.04em; font-weight: 600; }
.method-grid h3 { margin: 16px 0 8px; font-size: 16px; font-weight: 600; }
.method-grid p { margin: 0; color: var(--muted); font-size: 13px; }

.product-grid { margin-top: 36px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.product { padding: 24px; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
.product-label { color: var(--muted); font-size: 12px; font-weight: 600; letter-spacing: 0.06em; }
.product h3 { margin: 8px 0; font-size: 22px; }
.product p { color: var(--muted); }
.product ul { padding-left: 20px; color: var(--ink); }
.product .button { margin-top: 12px; }

.program-showcase { margin-top: 36px; display: grid; gap: 16px; }
.program-panel {
  display: grid; grid-template-columns: .94fr 1.06fr; min-height: 0;
  overflow: hidden; border: 1px solid var(--line); border-radius: 4px;
  background: #fff; box-shadow: none;
}
.program-panel.reverse { grid-template-columns: 1.06fr .94fr; color: var(--ink); background: #fff; border-color: var(--line); }
.program-panel.reverse .program-copy { order: 2; }
.program-copy { padding: 32px; align-self: center; }
.program-kicker {
  display: inline-flex; padding: 2px 8px; border-radius: 2px;
  color: var(--ink); background: var(--canvas); border: 1px solid var(--line);
  font-size: 11px; font-weight: 600; letter-spacing: 0;
}
.program-kicker.lime { color: var(--ink); background: var(--canvas); }
.program-copy h3 { margin: 14px 0 10px; font-size: 28px; line-height: 1.2; letter-spacing: -0.03em; font-weight: 600; }
.program-summary { color: var(--muted); font-size: 14px; word-break: keep-all; }
.reverse .program-summary { color: var(--muted); }
.feature-chips { margin: 18px 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; list-style: none; }
.feature-chips li {
  padding: 4px 8px; border: 1px solid var(--line); border-radius: 2px;
  background: #fff; color: var(--ink); font-size: 12px; font-weight: 400;
}
.reverse .feature-chips li { border-color: var(--line); background: #fff; color: var(--ink); }
.level-note { padding: 12px 14px; border-left: 2px solid var(--ink); color: var(--muted); background: var(--canvas); font-size: 13px; }
.level-note strong { display: block; color: var(--ink); }
.reverse .level-note { border-color: var(--ink); color: var(--muted); background: var(--canvas); }
.reverse .level-note strong { color: var(--ink); }
.program-visual { margin: 0; min-width: 0; display: flex; flex-direction: column; justify-content: center; background: var(--canvas); }
.program-visual img { width: 100%; height: auto; display: block; box-shadow: none; }
.program-visual figcaption { padding: 12px 16px; color: var(--muted); font-size: 12px; }

.algo-visual {
  margin: 28px; padding: 20px; align-self: center;
  border: 1px solid var(--line); border-radius: 4px;
  background: #fff; box-shadow: none;
}
.algo-head {
  padding-bottom: 12px; display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--line); color: var(--muted);
  font-size: 11px; letter-spacing: 0.04em;
}
.algo-head span { width: 8px; height: 8px; border-radius: 50%; background: #107c10; box-shadow: none; }
.algo-head small { margin-left: auto; }
.signal-grid { margin-top: 14px; display: grid; gap: 8px; }
.signal-grid > div {
  min-height: 72px; padding: 12px; position: relative;
  border: 1px solid var(--line); border-radius: 2px; background: var(--canvas);
}
.signal-grid small, .signal-grid strong { display: block; }
.signal-grid small { color: var(--muted); font-size: 11px; }
.signal-grid strong { margin-top: 4px; font-size: 14px; color: var(--ink); }
.bars { position: absolute; right: 12px; bottom: 14px; display: flex; align-items: end; gap: 3px; height: 28px; }
.bars b { width: 4px; border-radius: 1px; background: var(--blue); }
.bars b:nth-child(1){height:30%}.bars b:nth-child(2){height:55%}.bars b:nth-child(3){height:42%}.bars b:nth-child(4){height:80%}.bars b:nth-child(5){height:100%}
.score, .safe {
  position: absolute; right: 12px; top: 16px;
  width: 36px; height: 36px; display: grid; place-items: center;
  border-radius: 50%; color: #107c10; background: #fff; border: 1px solid #d1e8d1;
  font-style: normal; font-weight: 700; font-size: 12px;
}
.safe { width: auto; height: auto; padding: 3px 8px; border-radius: 2px; color: #107c10; background: #fff; font-size: 11px; }
.algo-flow { margin-top: 12px; display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 11px; font-weight: 600; }
.algo-flow i { color: var(--line); font-style: normal; }
.algo-visual > p { margin: 14px 0 0; color: var(--muted); font-size: 12px; }

.difference-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
.comparison { overflow: hidden; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
.comparison > div {
  display: grid; grid-template-columns: .8fr 1.2fr; gap: 16px;
  padding: 14px 16px; border-bottom: 1px solid var(--line); font-size: 13px;
}
.comparison > div:last-child { border: 0; }
.comparison span { color: var(--muted); }
.comparison strong { color: var(--ink); font-weight: 600; }
.comparison-head { background: var(--canvas); }
.comparison-head span { color: var(--muted); font-weight: 600; }
.comparison-head strong { color: var(--ink); }

.skill-stack { margin-top: 36px; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: 4px; overflow: hidden; background: #fff; }
.skill-stack div { min-height: 0; padding: 20px; border-right: 1px solid var(--line); }
.skill-stack div:last-child { border: 0; }
.skill-stack span { color: var(--muted); font-size: 12px; font-weight: 600; }
.skill-stack strong { display: block; margin-top: 16px; font-size: 16px; color: var(--ink); }
.skill-stack p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }

.instructor-section { position: relative; overflow: hidden; background: #fff; }
.instructor-section::before { display: none; }
.instructor-card { position: relative; display: grid; grid-template-columns: 1fr 280px; gap: 48px; align-items: center; }
.instructor-card h2 { margin: 0; font-size: clamp(24px, 3.4vw, 32px); line-height: 1.25; letter-spacing: -0.03em; font-weight: 600; }
.instructor-card > div > p:not(.eyebrow) { max-width: 720px; color: var(--muted); }
.instructor-card > div > p strong { color: var(--ink); }
.instructor-card aside {
  padding: 20px; display: flex; flex-direction: column;
  border-radius: 4px; color: var(--ink);
  background: #fff; border: 1px solid var(--line); box-shadow: none;
}
.instructor-card aside span { color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: 0.06em; }
.instructor-card aside strong { margin-top: 6px; font-size: 18px; }
.instructor-card aside hr { width: 100%; margin: 16px 0; border: 0; border-top: 1px solid var(--line); }
.instructor-card aside small { margin-top: 6px; color: var(--muted); }

.paid-badge {
  width: fit-content; margin: 0 auto 14px !important; padding: 3px 8px;
  border-radius: 2px; color: var(--ink) !important;
  background: #fff; border: 1px solid var(--line);
  font-size: 12px; font-weight: 600;
}
.schedule { margin-top: 36px; display: grid; grid-template-columns: 1.1fr .9fr; gap: 16px; }
.schedule-panel { padding: 24px; border-radius: 4px; background: #fff; border: 1px solid var(--line); }
.week-line { display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.week-line:last-child { border: 0; }
.week-line strong { color: var(--ink); }
.week-line p { margin: 0; font-size: 14px; }
.week-line span { display: block; color: var(--muted); font-size: 12px; }
.weekly-card { padding: 24px; border-radius: 4px; color: var(--ink); background: #fff; border: 1px solid var(--line); }
.weekly-card h3 { margin-top: 0; font-size: 18px; font-weight: 600; }
.weekly-card ol { padding-left: 20px; }
.weekly-card li { margin: 12px 0; }
.weekly-card small { color: var(--muted); }

.risk {
  margin-top: 28px; padding: 16px 18px; display: flex; gap: 12px;
  border-radius: 4px; background: var(--canvas); color: var(--ink);
  border: 1px solid var(--line); font-size: 13px;
}
.risk strong { display: block; margin-bottom: 3px; }
.risk i {
  flex: 0 0 auto; width: 22px; height: 22px; display: grid; place-items: center;
  border-radius: 50%; background: #fff; color: var(--ink);
  border: 1px solid var(--line); font-style: normal; font-weight: 700;
}

.cta-block { padding: 64px 0; text-align: center; color: var(--ink); background: var(--canvas); border-top: 1px solid var(--line); }
.cta-block h2 { margin: 0; font-size: clamp(24px, 3.4vw, 32px); letter-spacing: -0.03em; font-weight: 600; }
.cta-block p { color: var(--muted); }
.cta-block .actions { justify-content: center; }
.cta-block .button.ghost { background: #fff; }

.footer {
  padding: 36px 0 20px; color: var(--muted);
  background: #fff; border-top: 1px solid var(--line); font-size: 12px;
}
.footer-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; }
.footer strong { color: var(--ink); }
.footer a { color: var(--ink); }
.footer a:hover { text-decoration: underline; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px 18px; align-content: start; }
.copyright { margin-top: 24px; padding-top: 14px; border-top: 1px solid var(--line); }

.page-hero { padding: 48px 0 40px; color: var(--ink); background: #fff; border-bottom: 1px solid var(--line); }
.page-hero .breadcrumb { color: var(--muted); font-size: 12px; font-weight: 600; }
.page-hero h1 { max-width: 850px; margin: 12px 0; font-size: clamp(28px, 4vw, 40px); line-height: 1.2; letter-spacing: -0.03em; font-weight: 600; }
.page-hero .lead { max-width: 820px; }
.outline-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  background: #fff; margin-top: 28px;
  border: 1px solid var(--line); border-radius: 4px; overflow: hidden;
}
.outline-bar div { padding: 14px 16px; background: #fff; border-right: 1px solid var(--line); }
.outline-bar div:last-child { border-right: 0; }
.outline-bar span, .outline-bar strong { display: block; }
.outline-bar span { color: var(--muted); font-size: 11px; }
.outline-bar strong { margin-top: 4px; color: var(--ink); }

.week-stack { margin-top: 36px; display: grid; gap: 12px; }
.week {
  display: grid; grid-template-columns: 96px 1fr;
  border: 1px solid var(--line); border-radius: 4px; overflow: hidden;
  background: #fff; box-shadow: none;
}
.week-num { padding: 20px; color: var(--ink); background: var(--canvas); border-right: 1px solid var(--line); }
.week-num small, .week-num strong { display: block; }
.week-num small { color: var(--muted); }
.week-num strong { margin-top: 6px; font-size: 22px; }
.week-body { padding: 20px 24px; }
.week-body h3 { margin: 0; font-size: 18px; font-weight: 600; }
.week-body > p { margin: 8px 0 16px; color: var(--muted); }
.session-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.session-grid div { padding: 14px; border-radius: 2px; background: var(--canvas); border: 1px solid var(--line); }
.session-grid strong { display: block; margin-bottom: 8px; font-size: 13px; }
.session-grid ul { margin: 0; padding-left: 18px; font-size: 13px; }
.deliverable { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--ink); font-size: 13px; font-weight: 600; }

.criteria-grid { margin-top: 32px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.criteria-grid article { padding: 20px; border-radius: 4px; background: #fff; border: 1px solid var(--line); }
.criteria-grid b { color: var(--muted); font-size: 12px; }
.criteria-grid h3 { margin: 10px 0 6px; font-size: 16px; font-weight: 600; }
.criteria-grid p { margin: 0; color: var(--muted); font-size: 13px; }

.learning-design { background: var(--canvas); }
.learning-path {
  margin: 36px 0 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr);
  list-style: none; border: 1px solid var(--line); border-radius: 4px; overflow: hidden;
  background: #fff; box-shadow: none;
}
.learning-path li { min-height: 0; padding: 20px; position: relative; border-right: 1px solid var(--line); }
.learning-path li:last-child { border: 0; }
.learning-path li:not(:last-child)::after {
  content: "→"; position: absolute; z-index: 2; right: -10px; top: 20px;
  width: 20px; height: 20px; display: grid; place-items: center;
  border-radius: 50%; color: var(--muted); background: #fff;
  border: 1px solid var(--line); font-size: 11px; font-weight: 700;
}
.learning-path span { color: var(--muted); font-size: 11px; font-weight: 600; }
.learning-path strong { display: block; margin-top: 20px; font-size: 15px; line-height: 1.35; }
.learning-path p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.advanced-path span { color: var(--muted); }
.advanced-path li:not(:last-child)::after { color: var(--muted); }

.ai-protocol {
  margin-top: 20px; padding: 24px;
  display: grid; grid-template-columns: 1.25fr .75fr; gap: 32px;
  border-radius: 4px; color: var(--ink);
  background: #fff; border: 1px solid var(--line); box-shadow: none;
}
.ai-protocol > div > span { color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: 0.06em; }
.ai-protocol h3 { margin: 8px 0; font-size: 18px; font-weight: 600; }
.ai-protocol p { margin: 0; color: var(--muted); font-size: 14px; }
.ai-protocol ol { margin: 0; padding-left: 20px; color: var(--ink); font-size: 13px; }
.ai-protocol li { margin: 6px 0; padding-left: 4px; }

.practice-loop { margin-top: 36px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.practice-loop.four { grid-template-columns: repeat(4, 1fr); }
.practice-loop article {
  min-height: 0; padding: 18px; position: relative;
  border: 1px solid var(--line); border-radius: 4px; background: #fff;
}
.practice-loop article:not(:last-child)::after {
  content: "+"; position: absolute; z-index: 2; right: -13px; top: 20px;
  width: 22px; height: 22px; display: grid; place-items: center;
  border-radius: 50%; color: var(--ink); background: #fff;
  border: 1px solid var(--line); font-weight: 700;
}
.practice-loop b { color: var(--muted); font-size: 11px; }
.practice-loop strong { display: block; margin-top: 16px; font-size: 15px; }
.practice-loop p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.gate-label {
  display: inline-flex; margin-right: 6px; padding: 1px 6px; border-radius: 2px;
  color: var(--ink); background: #fff; border: 1px solid var(--line);
  font-size: 10px; font-weight: 700; vertical-align: 1px;
}

.workshop-section { background: var(--canvas); }
.class-clock {
  margin-top: 36px; display: grid; grid-template-columns: repeat(5, 1fr);
  border: 1px solid var(--line); border-radius: 4px; overflow: hidden;
  background: #fff; box-shadow: none;
}
.class-clock div { min-height: 0; padding: 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.class-clock div:nth-child(5n) { border-right: 0; }
.class-clock div:nth-child(n+6) { border-bottom: 0; }
.class-clock b, .class-clock strong, .class-clock span { display: block; }
.class-clock b { color: var(--muted); font-size: 11px; }
.class-clock strong { margin-top: 12px; font-size: 14px; }
.class-clock span { margin-top: 4px; color: var(--muted); font-size: 12px; }
.class-clock .clinic { color: var(--ink); background: var(--canvas); }
.class-clock .clinic b { color: var(--ink); }
.class-clock .clinic span { color: var(--muted); }
.class-clock .break { background: var(--canvas); }

.question-guide { margin-top: 16px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.question-guide > div { padding: 20px; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
.question-guide span { color: var(--muted); font-size: 12px; font-weight: 600; }
.question-guide ol { margin: 12px 0 0; padding-left: 18px; columns: 2; color: var(--muted); font-size: 13px; }
.question-guide li { margin: 6px 12px 6px 0; break-inside: avoid; }

.workshop-title { margin-top: 64px; }
.class-weeks { margin-top: 32px; display: grid; gap: 16px; }
.class-week { overflow: hidden; border: 1px solid var(--line); border-radius: 4px; background: #fff; box-shadow: none; }
.class-week header { padding: 20px 22px; color: var(--ink); background: #fff; border-bottom: 1px solid var(--line); }
.class-week header span { color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: 0.04em; }
.class-week header h3 { margin: 6px 0 2px; font-size: 18px; font-weight: 600; }
.class-week header p { margin: 0; color: var(--muted); font-size: 13px; }
.assignment-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.assignment-grid > div { min-height: 0; padding: 20px; border-right: 1px solid var(--line); }
.assignment-grid > div:last-child { border: 0; }
.assignment-grid b { color: var(--ink); font-size: 13px; }
.assignment-grid p { margin: 12px 0; color: var(--ink); font-size: 14px; }
.assignment-grid small { display: block; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }

.tools-table { width: 100%; margin-top: 28px; border-collapse: collapse; background: #fff; border-radius: 4px; overflow: hidden; box-shadow: none; border: 1px solid var(--line); }
.tools-table th, .tools-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--line); }
.tools-table th { background: var(--canvas); font-size: 13px; font-weight: 600; }
.tools-table td { font-size: 14px; }
.tools-table tr:last-child td { border: 0; }

.reveal { opacity: 1; transform: none; transition: none; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

@media (max-width: 900px) {
  .menu { display: block; }
  .nav {
    position: fixed; inset: 56px 0 auto; padding: 20px;
    flex-direction: column; align-items: flex-start;
    background: #fff; border-bottom: 1px solid var(--line);
    transform: translateY(-130%); transition: transform .2s;
  }
  .nav.open { transform: none; }
  .hero-grid, .schedule, .footer-grid { grid-template-columns: 1fr; }
  .terminal { max-width: 650px; transform: none; }
  .facts { grid-template-columns: 1fr 1fr; }
  .facts div:nth-child(2) { border-right: 0; }
  .facts div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .method-grid { grid-template-columns: 1fr 1fr; }
  .method-grid article:nth-child(2n) { border-right: 0; }
  .method-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .course-pair, .product-grid, .program-panel, .program-panel.reverse, .difference-grid, .instructor-card { grid-template-columns: 1fr; }
  .program-panel.reverse .program-copy { order: initial; }
  .skill-stack { grid-template-columns: 1fr 1fr; }
  .skill-stack div:nth-child(2) { border-right: 0; }
  .skill-stack div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .learning-path { grid-template-columns: 1fr 1fr; }
  .learning-path li { border-bottom: 1px solid var(--line); }
  .learning-path li:nth-child(2n) { border-right: 0; }
  .learning-path li:not(:last-child)::after { display: none; }
  .practice-loop, .practice-loop.four { grid-template-columns: 1fr 1fr; }
  .practice-loop article:not(:last-child)::after { display: none; }
  .ai-protocol { grid-template-columns: 1fr; gap: 20px; }
  .class-clock { grid-template-columns: repeat(2, 1fr); }
  .class-clock div, .class-clock div:nth-child(5n), .class-clock div:nth-child(n+6) { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .class-clock div:nth-child(2n) { border-right: 0; }
  .class-clock div:nth-child(n+9) { border-bottom: 0; }
  .assignment-grid { grid-template-columns: 1fr; }
  .assignment-grid > div { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .outline-bar { grid-template-columns: 1fr 1fr; }
  .outline-bar div:nth-child(2n) { border-right: 0; }
  .outline-bar div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .criteria-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  :root { --shell: min(100% - 28px, 1120px); }
  .hero { padding-top: 40px; }
  .hero h1 { font-size: 30px; }
  .section { padding: 48px 0; }
  .facts, .method-grid, .outline-bar, .skill-stack, .learning-path, .practice-loop, .practice-loop.four, .class-clock, .question-guide { grid-template-columns: 1fr; }
  .facts div { border-right: 0; border-bottom: 1px solid var(--line); }
  .method-grid article { border-right: 0; border-bottom: 1px solid var(--line); }
  .skill-stack div { border-right: 0; border-bottom: 1px solid var(--line); }
  .learning-path li { min-height: auto; border-right: 0; }
  .learning-path strong { margin-top: 12px; }
  .practice-loop article { min-height: auto; }
  .practice-loop strong { margin-top: 12px; }
  .ai-protocol { padding: 18px; }
  .class-clock div, .class-clock div:nth-child(2n), .class-clock div:nth-child(n+9) { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .class-clock div:last-child { border-bottom: 0; }
  .question-guide ol { columns: 1; }
  .workshop-title { margin-top: 48px; }
  .class-week header { padding: 16px; }
  .assignment-grid > div { padding: 16px; }
  .build-flow { grid-template-columns: 1fr; }
  .course-card, .program-copy { padding: 20px; }
  .algo-visual { margin: 16px; }
  .program-copy h3 { font-size: 24px; }
  .comparison > div { grid-template-columns: 1fr; gap: 4px; }
  .week { grid-template-columns: 1fr; }
  .week-num { padding: 14px 18px; border-right: 0; border-bottom: 1px solid var(--line); }
  .week-num small, .week-num strong { display: inline; margin-right: 8px; }
  .week-body { padding: 18px; }
  .session-grid { grid-template-columns: 1fr; }
  .tools-table { display: block; overflow-x: auto; white-space: nowrap; }
  .outline-bar div { border-right: 0; border-bottom: 1px solid var(--line); }
}