/* Trang giới thiệu / hướng dẫn / thế giới (tools/gen-seo.mjs) */
:root { --bg: #140a08; --card: #22130d; --line: rgba(255, 210, 130, 0.25); --text: #f1e4cc; --dim: #c9b28c; --gold: #ffd27a; }
* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(ellipse at top, #2c160d, var(--bg) 60%) fixed, var(--bg); color: var(--text); font: 16px/1.7 'Be Vietnam Pro', system-ui, sans-serif; }
a { color: var(--gold); }
.pg-top { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding: 10px 20px; background: rgba(20, 10, 8, 0.92); border-bottom: 1px solid var(--line); backdrop-filter: blur(6px); }
.pg-logo { font: 700 20px 'Noto Serif', serif; color: var(--gold); text-decoration: none; letter-spacing: 2px; }
.pg-logo small { font-size: 11px; letter-spacing: 4px; color: var(--dim); }
.pg-top nav { display: flex; gap: 16px; flex: 1; flex-wrap: wrap; }
.pg-top nav a { color: var(--dim); text-decoration: none; font-weight: 600; font-size: 14px; }
.pg-top nav a:hover, .pg-top nav a[aria-current] { color: var(--gold); }
.pg-play { display: inline-block; padding: 8px 18px; border-radius: 22px; background: linear-gradient(#c8341f, #7d1a0e); border: 1px solid var(--gold); color: #fff3d6; font-weight: 700; text-decoration: none; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5); }
.pg-play:hover { filter: brightness(1.15); }
.pg-play.big { padding: 14px 28px; font-size: 18px; }
main { max-width: 980px; margin: 0 auto; padding: 24px 16px 40px; }
h1 { font: 700 clamp(28px, 5vw, 42px)/1.2 'Noto Serif', serif; color: var(--gold); margin: 12px 0 16px; }
h2 { font: 700 24px/1.3 'Noto Serif', serif; color: var(--gold); margin: 40px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
h3 { margin: 8px 0 4px; color: #ffe6b0; }
.lead { font-size: 18px; color: var(--text); }
figure { margin: 20px 0; }
img, video { max-width: 100%; height: auto; border-radius: 10px; display: block; }
.feat li { margin-bottom: 8px; }
.cls, .zones, .gal { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); }
.zones { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.gal { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.cls article, .zones article, .gal figure { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px; margin: 0; }
.cls img { aspect-ratio: 3 / 4; object-fit: cover; width: 100%; background: #0d0604; }
.zones img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.zones p, .cls p { margin: 4px 0; font-size: 14px; color: var(--dim); }
.zones .lv { color: var(--gold); }
.gal figcaption { font-size: 14px; color: var(--dim); padding-top: 6px; }
.hero-video { border: 1px solid var(--line); }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
th { background: var(--card); color: var(--gold); }
.faq dt { font-weight: 700; color: #ffe6b0; margin-top: 14px; }
.faq dd { margin: 4px 0 0; color: var(--dim); }
.pg-cta { text-align: center; margin: 48px 0 0; }
footer { text-align: center; padding: 24px 16px; color: var(--dim); font-size: 13px; border-top: 1px solid var(--line); }
@media (max-width: 600px) { .pg-top { gap: 8px 14px; padding: 10px 16px; } .pg-top nav { order: 3; flex-basis: 100%; gap: 14px; } .pg-play { padding: 6px 14px; font-size: 14px; } }
.pg-donate { display: flex; gap: 24px; align-items: center; margin: 48px 0 0; padding: 22px; border-radius: 16px; background: linear-gradient(rgba(90, 20, 10, 0.5), rgba(30, 10, 5, 0.6)); border: 1px solid #c98a2a; box-shadow: 0 0 40px rgba(255, 90, 60, 0.12); }
.pg-donate img { flex: 0 0 auto; width: 180px; padding: 10px; background: #fff; border-radius: 12px; image-rendering: pixelated; box-shadow: 0 0 0 3px #c98a2a; }
.pg-donate h2 { margin: 0 0 8px; border: 0; padding: 0; }
.pg-donate p { margin: 6px 0; color: var(--dim); }
.pg-donate .acct { color: var(--text); }
.pg-donate .acct b { color: var(--gold); font: 700 18px ui-monospace, Menlo, monospace; letter-spacing: 1px; }
@media (max-width: 600px) { .pg-donate { flex-direction: column; text-align: center; } }
.why { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.why article { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; }
.why h3 { margin: 0 0 4px; font-size: 17px; }
.why p { margin: 0; font-size: 14.5px; color: var(--dim); }
ol li { margin-bottom: 6px; }