:root {
  --bg: #0c0f14;
  --bg-2: #11151c;
  --card: #151a23;
  --line: rgba(231, 226, 214, 0.1);
  --line-strong: rgba(231, 226, 214, 0.2);
  --text: #e9e5db;
  --muted: #98a0ad;
  --accent: #d6b36a;
  --accent-dim: rgba(214, 179, 106, 0.14);
  --danger: #c4566a;
  --radius: 16px;
  --max: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 76px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(214, 179, 106, 0.08), transparent 60%),
    radial-gradient(900px 500px at 0% 20%, rgba(120, 140, 180, 0.07), transparent 60%);
}

header, main, footer { position: relative; z-index: 1; }

.hero { display: contents; }
.topbar { z-index: 20; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px max(16px, calc((100% - var(--max)) / 2));
  background: rgba(12, 15, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.22em;
  text-decoration: none;
  color: var(--accent);
}

.nav-links { display: flex; gap: 22px; flex-wrap: wrap; }
.nav-links a { font-size: 14px; color: var(--muted); text-decoration: none; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--text);
  border-radius: 10px;
  padding: 6px 12px;
  font-size: 18px;
  cursor: pointer;
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 110px 16px 90px;
}

.eyebrow {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0 0 22px;
  font-family: 'Playfair Display', serif;
  font-size: clamp(40px, 8vw, 84px);
  line-height: 1.05;
  letter-spacing: -0.01em;
}

.lede { max-width: 640px; margin: 0 0 32px; font-size: 19px; color: #c9ccd4; }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.button {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--line-strong);
  transition: transform 0.15s, background 0.2s;
}
.button:hover { transform: translateY(-1px); }
.button.primary { background: var(--accent); color: #15120a; border-color: var(--accent); }
.button.ghost { color: var(--text); }
.button.ghost:hover { background: var(--accent-dim); }

.content-note {
  max-width: 640px;
  margin: 36px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--danger);
  font-size: 13px;
  color: var(--muted);
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 16px;
  border-top: 1px solid var(--line);
}

.section-kicker {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}

h2 {
  margin: 0 0 14px;
  font-family: 'Playfair Display', serif;
  font-size: clamp(28px, 4.5vw, 44px);
  line-height: 1.15;
}

h3 { margin: 0 0 8px; font-size: 18px; }

.section-heading { max-width: 720px; margin-bottom: 32px; }
.section-heading p:last-child { color: var(--muted); margin-bottom: 0; }

.intro-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 40px; align-items: start; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.card p { margin: 0 0 12px; color: #c4c7ce; font-size: 15px; }
.card p:last-child { margin-bottom: 0; }

.prose p { font-size: 16px; }

.muted { color: var(--muted); }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }

.quote-card { display: flex; flex-direction: column; justify-content: center; background: var(--accent-dim); border-color: rgba(214, 179, 106, 0.3); }
.quote-card span { font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); }
.quote-card blockquote { margin: 10px 0 0; font-family: 'Playfair Display', serif; font-size: 22px; line-height: 1.3; }
.quote-card.danger { background: rgba(196, 86, 106, 0.1); border-color: rgba(196, 86, 106, 0.35); }
.quote-card.danger span { color: var(--danger); }

.wide-note {
  margin: 24px 0 0;
  padding: 18px 22px;
  border-left: 3px solid var(--accent);
  background: var(--bg-2);
  border-radius: 0 12px 12px 0;
  color: #c4c7ce;
  font-size: 15px;
}

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin: 36px 0; }

.grade-list { display: grid; gap: 10px; }
.grade { display: grid; grid-template-columns: 130px 1fr; gap: 12px; padding: 12px 14px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; font-size: 14px; }
.grade b { color: var(--accent); }
.grade span { color: #c4c7ce; }

.accordion-list { display: grid; gap: 10px; margin-top: 24px; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; }
summary { cursor: pointer; padding: 14px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; color: var(--accent); font-size: 20px; transition: transform 0.2s; }
details[open] summary::after { transform: rotate(45deg); }
details p { margin: 0 0 16px; color: #c4c7ce; font-size: 15px; }

.slang { margin: 0 0 16px; padding-left: 18px; color: #c4c7ce; font-size: 15px; }
.slang li { margin-bottom: 6px; }
.slang b { color: var(--accent); }

.class-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; }
.class-grid .num { display: block; margin-bottom: 8px; font-family: 'Playfair Display', serif; font-size: 28px; color: var(--accent); }

.program-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; }
.tag { display: inline-block; padding: 3px 12px; border-radius: 999px; background: var(--accent-dim); color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: 0.15em; margin-bottom: 12px; }
.meta { color: var(--accent) !important; font-size: 12px !important; letter-spacing: 0.06em; text-transform: uppercase; }

.timeline { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.timeline .num { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 700; letter-spacing: 0.2em; color: var(--accent); }

.underground { background: linear-gradient(180deg, transparent, rgba(196, 86, 106, 0.05)); }
.underground .section-kicker { color: var(--danger); }

.reference-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; }
.reference-grid article { padding: 16px 18px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; display: grid; gap: 4px; }
.reference-grid b { color: var(--accent); font-size: 14px; }
.reference-grid span { color: #c4c7ce; font-size: 14px; }

footer { max-width: var(--max); margin: 0 auto; padding: 48px 16px 64px; border-top: 1px solid var(--line); font-size: 14px; }
footer p { margin: 0 0 6px; }

@media (max-width: 820px) {
  .intro-grid, .two-col { grid-template-columns: 1fr; gap: 24px; }
  .menu-toggle { display: inline-block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 8px 16px 16px;
    background: #0c0f14;
    border-bottom: 1px solid var(--line);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; font-size: 16px; border-bottom: 1px solid var(--line); }
  .hero-inner { padding: 72px 16px 56px; }
  .section { padding: 52px 16px; }
  .grade { grid-template-columns: 1fr; gap: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}