*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f5f6f8;color:#202124}.container{max-width:1180px;margin:auto;padding:0 16px}.site-header{background:#111827;color:#fff;position:sticky;top:0;z-index:5}.nav{min-height:64px;display:flex;align-items:center;gap:24px}.logo{color:#fff;text-decoration:none;font-size:22px;font-weight:700}.search{display:flex;flex:1;max-width:560px;margin-left:auto}.search input{flex:1;padding:11px 13px;border:0;border-radius:7px 0 0 7px}.search button,.btn{background:#2563eb;color:#fff;border:0;padding:10px 15px;border-radius:6px;text-decoration:none;cursor:pointer}.search button{border-radius:0 7px 7px 0}.page-title{margin:28px 0 18px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 10px #0000000d}.thumb{aspect-ratio:16/9;background:#ddd;display:block;overflow:hidden}.thumb img{width:100%;height:100%;object-fit:cover}.card-body{padding:12px}.card h2{font-size:16px;margin:0 0 7px;line-height:1.35}.card a{text-decoration:none;color:inherit}.muted{color:#6b7280;font-size:13px}.muted a{padding: 2px 6px; margin: 1px; border-radius: 9px; font-weight: bold; font-size: 12px; background: #fff; color: #111827; border: 1px solid #111827; transition: all 0.15s; text-decoration: none;}.pagination{display:flex;gap:7px;justify-content:center;margin:30px 0}.pagination a,.pagination span{padding:8px 12px;background:#fff;border-radius:6px;text-decoration:none;color:#222}.pagination .active{background:#2563eb;color:#fff}.video-player{background:#000;aspect-ratio:16/9;width:100%;border-radius:10px;overflow:hidden}.video-player iframe{width:100%;height:100%;border:0}.detail{max-width:900px;margin:28px auto}.detail h1{font-size:30px}.description{background:#fff;padding:18px;border-radius:10px;line-height:1.7;margin-top:18px}.categories{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}.tag{background:#e5e7eb;padding:6px 10px;border-radius:20px;font-size:13px}.footer{margin-top:50px;padding:28px 0;background:#111827;color:#fff}.admin{background:#f5f6f8}.admin-wrap{max-width:1100px;margin:30px auto;padding:0 15px}.admin-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.table{width:100%;border-collapse:collapse;background:#fff}.table th,.table td{padding:11px;border-bottom:1px solid #eee;text-align:left}.form{background:#fff;padding:20px;border-radius:10px}.form label{display:block;font-weight:600;margin:14px 0 6px}.form input,.form textarea,.form select{width:100%;padding:10px;border:1px solid #d1d5db;border-radius:6px}.form textarea{min-height:150px}.alert{padding:12px;background:#fee2e2;border-radius:7px;margin-bottom:15px}.success{background:#dcfce7}.actions{display:flex;gap:7px;flex-wrap:wrap}.btn-danger{background:#dc2626}.btn-secondary{background:#6b7280}@media(max-width:900px){.grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:650px){.nav{flex-wrap:wrap;padding:10px 16px}.search{order:3;flex-basis:100%}.grid{grid-template-columns:repeat(2,1fr);gap:10px}.detail h1{font-size:23px}.table{font-size:13px}.table th:nth-child(3),.table td:nth-child(3){display:none}}@media(max-width:420px){.grid{grid-template-columns:1fr}}

/* Related videos on video detail page */
.related-videos{margin-top:32px}
.related-videos h2{font-size:24px;margin:0 0 16px}
.related-videos .grid{grid-template-columns:repeat(4,1fr)}
.related-videos .card{min-width:0}
.related-videos .card h2{font-size:16px;margin:0 0 7px;line-height:1.35}
@media(max-width:900px){.related-videos .grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:650px){.related-videos .grid{grid-template-columns:repeat(2,1fr);gap:10px}.related-videos h2{font-size:21px}}
@media(max-width:420px){.related-videos .grid{grid-template-columns:1fr}}



/* DESIGN VARIANT: Cinema Dark */
:root{color-scheme:dark;--bg:#0b0d12;--surface:#151922;--ink:#f4f5f7;--muted:#9ba3b2;--accent:#f04452;--line:#292e39;--shadow:0 12px 30px rgba(0,0,0,.3)}
body{background:radial-gradient(ellipse at top,#1b202b 0,#0b0d12 54%);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.55}
.container{max-width:1320px}.site-header{background:rgba(13,16,23,.94);color:#fff;border-bottom:1px solid #292e39;backdrop-filter:blur(16px)}.nav{min-height:76px;gap:26px}.logo{color:#fff;font-size:24px;font-weight:850;letter-spacing:-.7px}.logo:before{content:"▶ ";color:var(--accent);font-size:17px}.search input{background:#202530;color:#f8fafc;border:1px solid #343b49;border-right:0;padding:13px 15px;outline:none}.search input::placeholder{color:#858d9c}.search button,.btn{background:var(--accent);color:white;font-weight:800;border-radius:0 8px 8px 0}.page-title{font-size:clamp(25px,3vw,35px);letter-spacing:-.8px;margin:34px 0 22px}.page-title:after{content:"";display:block;width:58px;height:4px;background:var(--accent);border-radius:5px;margin-top:11px}
.grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:19px}.card{background:linear-gradient(145deg,#191e28,#12151c);border:1px solid #282e3a;border-radius:10px;overflow:hidden;box-shadow:var(--shadow);transition:transform .18s,border-color .18s}.card:hover{transform:translateY(-3px);border-color:#f04452}.thumb{background:#222733;position:relative}.thumb:after{content:"▶";position:absolute;right:12px;bottom:12px;width:34px;height:26px;display:grid;place-items:center;border-radius:6px;background:#f04452;color:white;font-size:12px;box-shadow:0 4px 12px #0008}.thumb img{filter:saturate(.9);transition:filter .2s,transform .3s}.card:hover .thumb img{filter:saturate(1.15);transform:scale(1.04)}.card-body{padding:13px 14px 16px}.card h2{font-size:15px;line-height:1.45}.card a{color:#f1f3f7}.muted{color:#9ba3b2;font-size:12px}.muted a{background:#272c37;color:#f4f5f7;border:1px solid #3a414e}.pagination a,.pagination span{background:#191e28;color:#f4f5f7;border:1px solid #2a303c}.pagination .active{background:var(--accent);border-color:var(--accent)}.detail{max-width:1000px}.detail h1{font-size:clamp(25px,3vw,36px);line-height:1.2}.video-player{border:1px solid #303643;border-radius:12px;box-shadow:0 20px 50px #0009}.description{background:#151922;border:1px solid #292e39;color:#d8dce5;padding:22px;border-radius:12px;line-height:1.8}.tag{background:#282e3a;color:#e8ebf1}.related-videos h2{font-size:25px}.footer{background:#080a0f;color:#8c94a3;border-top:1px solid #252a34}.admin{background:#0b0d12;color:#f4f5f7}.form,.table{background:#151922;color:#f4f5f7;border:1px solid #292e39;border-radius:10px}.table th,.table td{border-color:#292e39}.form input,.form textarea,.form select{background:#0e1118;color:#f4f5f7;border-color:#363d4b}.alert{color:#fee2e2}.success{color:#dcfce7}
@media(max-width:900px){.grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}}@media(max-width:650px){.nav{gap:12px;padding-top:12px;padding-bottom:12px}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.card{border-radius:8px}.card-body{padding:10px}.detail h1{font-size:24px}.description{padding:15px}}@media(max-width:420px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}