:root{color-scheme:dark;--bg:#07121e;--panel:#102331;--edge:#274858;--accent:#31e6b8;--text:#eff9fc;--muted:#a7bdca}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:linear-gradient(130deg,#06121d,#10313a);color:var(--text);font:15px system-ui,-apple-system,Segoe UI,sans-serif}header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:14px max(18px,4vw);background:#081a27;border-bottom:1px solid var(--edge)}.brand{display:flex;align-items:center;gap:10px;font-size:26px;font-weight:900;color:var(--accent)}.brand b{color:white}.mark{display:grid;place-items:center;border:2px solid var(--accent);border-radius:13px;width:44px;height:44px;font-size:20px}.subtitle{font-size:12px;letter-spacing:2px;color:var(--muted)}main{max-width:1500px;margin:auto;padding:18px}.panel{background:var(--panel);border:1px solid var(--edge);border-radius:15px}.login{max-width:520px;margin:6vh auto;padding:26px}.login h1{margin:0 0 8px}.login p{line-height:1.5;color:var(--muted)}.tabs{display:flex;gap:8px;margin:20px 0}.tabs button{flex:1}.tabs button.active{background:var(--accent);color:#06241f}form{display:grid;gap:13px}label{display:grid;gap:6px;color:#cde0e9;font-weight:600}input,button{font:inherit;border-radius:10px;padding:12px;min-width:0}input{background:#071824;border:1px solid #35566a;color:#fff;width:100%}button{background:#244453;border:1px solid #315665;color:#fff;cursor:pointer;font-weight:700}button:hover{filter:brightness(1.12)}button:disabled{opacity:.55}.primary{background:var(--accent);color:#06231e;border-color:var(--accent)}.filelabel{margin-top:8px;border:1px dashed #507184;padding:14px;border-radius:10px}.filelabel input{font-size:12px}.hint{font-size:12px}#status{white-space:pre-wrap;color:#ffcb85;margin-top:14px}#app[hidden],#login[hidden],#xform[hidden],#mform[hidden]{display:none}.toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.layout{display:grid;grid-template-columns:minmax(160px,220px) minmax(200px,300px) minmax(280px,1fr);gap:12px;height:calc(100vh - 200px);min-height:460px}.categories,.channelspane{display:flex;flex-direction:column;overflow:hidden}.layout h2{font-size:15px;margin:0;padding:14px;border-bottom:1px solid var(--edge)}#categories,#channels{overflow-y:auto;flex:1;overscroll-behavior:contain}.item{display:flex;align-items:center;gap:10px;width:100%;border:0;border-radius:0;background:transparent;text-align:left;font-weight:500;padding:13px;border-bottom:1px solid #203d4a;overflow-wrap:anywhere}.item.active{background:#17504b;color:var(--accent)}.item img{width:30px;height:30px;object-fit:contain}.channelspane input{margin:9px;width:calc(100% - 18px)}.playerpane{padding:12px;overflow-y:auto}.playerfixed{position:sticky;top:0}.video-wrap{aspect-ratio:16/9;background:black;border-radius:12px;overflow:hidden}.video-wrap video{width:100%;height:100%;display:block;background:black}.playerpane h2{padding:14px 0;border:0}.controls{display:flex;flex-wrap:wrap;gap:7px}.controls button{flex:1;white-space:nowrap;font-size:13px}#playstatus{color:var(--muted);line-height:1.5;font-size:13px}footer{text-align:center;color:var(--muted);font-size:12px;padding:12px 20px}@media(max-width:900px){.layout{grid-template-columns:minmax(120px,35%) 1fr;height:auto}.categories,.channelspane{height:280px}.playerpane{grid-column:1/-1;grid-row:1}.playerfixed{position:relative}.login{margin:20px auto}}@media(max-width:520px){header{height:64px}.brand{font-size:22px}.subtitle{font-size:10px}main{padding:10px}.login{padding:18px}.layout{gap:8px;grid-template-columns:minmax(105px,37%) 1fr}.categories,.channelspane{height:330px}.item{padding:11px 8px;font-size:13px}.controls button{padding:10px 5px;font-size:12px}.playerpane{padding:9px}}