*{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: Neon Arcade */
:root{color-scheme:dark;--bg:#080b1a;--surface:#11162a;--ink:#eef3ff;--muted:#9aa7ca;--accent:#20e3d2;--line:#29335b;--shadow:0 0 0 1px #20e3d214,0 12px 32px #02061780}
body{background:radial-gradient(circle at 12% 0,#15224b 0,transparent 33%),radial-gradient(circle at 90% 20%,#301545 0,transparent 28%),#080b1a;color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,sans-serif;line-height:1.55}.container{max-width:1340px}.site-header{background:rgba(8,11,26,.91);color:#fff;border-bottom:1px solid #27335c;box-shadow:0 5px 30px #030617aa;backdrop-filter:blur(15px)}.nav{min-height:78px;gap:26px}.logo{color:#eef3ff;font-size:24px;font-weight:900;letter-spacing:-1px;text-shadow:0 0 18px #20e3d288}.logo:before{content:"✦ ";color:#20e3d2}.search input{background:#10162c;color:#f4f7ff;border:1px solid #33416e;border-right:0;border-radius:8px 0 0 8px;padding:13px 15px}.search button,.btn{background:linear-gradient(120deg,#20e3d2,#8d6bff);color:#06101e;border-radius:0 8px 8px 0;font-weight:900}.page-title{font-size:clamp(25px,3vw,36px);letter-spacing:-1px;margin:34px 0 23px}.page-title:after{content:"";display:block;height:2px;width:100%;margin-top:13px;background:linear-gradient(90deg,#20e3d2,#8d6bff,transparent)}.grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.card{background:linear-gradient(150deg,#141b34,#0d1225);border:1px solid #2a3763;border-radius:12px;box-shadow:var(--shadow);transition:transform .2s,border-color .2s,box-shadow .2s}.card:hover{transform:translateY(-4px);border-color:#20e3d2;box-shadow:0 0 0 1px #20e3d255,0 12px 35px #020617cc}.thumb{background:#121a33;border-bottom:1px solid #27345c}.thumb img{transition:transform .35s,filter .35s;filter:saturate(1.1)}.card:hover .thumb img{transform:scale(1.05);filter:saturate(1.3)}.card-body{padding:14px 15px 17px}.card h2{font-size:15px;line-height:1.4}.card a{color:#f1f5ff}.muted{color:#9aa7ca;font-size:12px}.muted a{background:#1b2445;color:#69f7ed;border:1px solid #37477a}.pagination a,.pagination span{background:#11162a;border:1px solid #2b3761;color:#eaf0ff}.pagination .active{background:#20e3d2;border-color:#20e3d2;color:#07101f}.detail{max-width:1040px}.detail h1{font-size:clamp(26px,3vw,37px);letter-spacing:-.6px}.video-player{border:1px solid #40528a;border-radius:14px;box-shadow:0 0 35px #20e3d21c,0 20px 50px #0008}.description{background:linear-gradient(145deg,#141b34,#0d1225);border:1px solid #2a3763;border-radius:12px;padding:22px;color:#dbe4ff;line-height:1.8}.tag{background:#1b2445;color:#69f7ed}.related-videos h2{font-size:25px}.footer{background:#060815;color:#8794ba;border-top:1px solid #27335c}.admin{background:#080b1a;color:#eef3ff}.form,.table{background:#11162a;color:#eef3ff;border:1px solid #29365e;border-radius:12px}.table th,.table td{border-color:#29365e}.form input,.form textarea,.form select{background:#080d20;color:#eef3ff;border-color:#34416c}.admin-nav .btn{border-radius:8px}
@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:9px}.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))}}