/* ...existing styles... */
:root { --bg: #fff; --fg: #0a0a0a; --muted: #5a5a5a; --line: #e8e8e8; --card: #fafafa; --accent: #111; }
@media (prefers-color-scheme: dark){ :root{ --bg:#0b0b0b; --fg:#f5f5f5; --muted:#b1b1b1; --line:#1d1d1d; --card:#101010; --accent:#f5f5f5; } }
*{ box-sizing: border-box; }
body{ margin:0; font-family:"Noto Sans",system-ui,-apple-system,Segoe UI,Roboto; color:var(--fg); background:var(--bg); line-height:1.6; }
.container{ width:min(1100px, 92%); margin-inline:auto; }
.section{ padding:72px 0; }
.section.alt{ background: var(--card); }
.site-header{ position:sticky; top:0; background:var(--bg); border-bottom:1px solid var(--line); z-index:10; backdrop-filter:saturate(1.2) blur(6px); }
.header-inner{ display:flex; align-items:center; justify-content:space-between; padding:14px 0; }
.brand{ display:flex; align-items:center; gap:10px; text-decoration:none; color:inherit; }
.brand-mark{ font-family:"Space Mono", monospace; border:1px solid var(--line); padding:2px 6px; border-radius:6px; }
.brand-text{ font-weight:700; letter-spacing:.3px; }
.nav-toggle{ display:none; }
.nav-list{ display:flex; gap:18px; list-style:none; margin:0; padding:0; }
.nav-list a{ text-decoration:none; color:var(--fg); }
.nav-list a:hover{ text-decoration:underline; }
.hero-grid{ display:grid; grid-template-columns:1.1fr .9fr; gap:36px; align-items:center; }
.lead{ color:var(--muted); max-width:55ch; }
.btn{ display:inline-block; border:1px solid var(--fg); color:var(--fg); padding:10px 14px; border-radius:10px; text-decoration:none; transition:transform .15s ease, background .15s ease; }
.btn:hover{ transform:translateY(-1px); background:var(--fg); color:var(--bg); }
.btn.primary{ background:var(--fg); color:var(--bg); }
.btn.small{ padding:8px 12px; font-size:.9rem; }
.card{ background:var(--bg); border:1px solid var(--line); border-radius:14px; padding:18px; }
.grid.cards{ display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:16px; }
.two-col{ display:grid; grid-template-columns:1.2fr .8fr; gap:24px; align-items:start; }
.checklist, .bulleted{ padding-left:18px; }
.meta p{ margin:.2rem 0; color:var(--muted); }
.examples{ display:grid; gap:22px; }
.codecard{ border:1px solid var(--line); border-radius:14px; overflow:hidden; }
.codecard header{ display:flex; align-items:center; justify-content:space-between; padding:10px 12px; background:var(--card); border-bottom:1px solid var(--line); }
.codecard pre{ margin:0; }
.copy{ border:none; background:transparent; cursor:pointer; color:var(--muted); }
.quiz{ display:grid; gap:16px; }
.quiz .q{ border:1px solid var(--line); border-radius:12px; padding:14px; background:var(--bg); }
.quiz .q legend{ font-weight:600; margin-bottom:8px; }
.quiz-result{ margin-top:10px; font-weight:700; }
.input{ width:100%; padding:12px 14px; border:1px solid var(--line); border-radius:12px; background:var(--bg); color:var(--fg); }
.gloss-list{ display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:14px; padding:0; list-style:none; margin-top:16px; }
.gloss-item{ border:1px solid var(--line); border-radius:12px; padding:12px; background:var(--bg); }
.site-footer{ border-top:1px solid var(--line); padding:24px 0; color:var(--muted); }
.reveal{ opacity:0; transform:translateY(10px); transition:opacity .5s ease, transform .5s ease; }
.reveal.in{ opacity:1; transform:none; }
.html.no-js .reveal{ opacity:1; transform:none; }
.hero-media img{ width:100%; height:auto; border:1px solid var(--line); border-radius:16px; }
@media (max-width: 900px){
  .hero-grid, .two-col{ grid-template-columns:1fr; }
  .nav-toggle{ display:inline-block; border:1px solid var(--line); background:transparent; padding:8px 10px; border-radius:10px; }
  .nav-list{ display:none; position:absolute; right:4%; top:58px; background:var(--bg); border:1px solid var(--line); border-radius:12px; padding:10px; flex-direction:column; }
  .nav-list.open{ display:flex; }
}
.sr-only{ position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
/* ...existing styles... */