:root{color-scheme:dark;--bg:#101210;--panel:#191c18;--line:#34382d;--gold:#d7bd7d;--muted:#a9ad9f;--red:#efb1a8}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 70% 0,#2b3021 0,transparent 52%),var(--bg);color:#f1f0e7;font:15px/1.7 system-ui,"Microsoft Yahei",sans-serif;min-height:100vh}header{height:88px;border-bottom:1px solid var(--line);padding:0 5vw;display:flex;align-items:center;justify-content:space-between}.brand{font:700 30px Georgia,serif;color:var(--gold);text-decoration:none;letter-spacing:5px}.brand span{font:12px system-ui;letter-spacing:3px;display:block;color:var(--muted)}nav{display:flex;gap:10px;align-items:center}main{max-width:1400px;margin:auto;padding:36px 5vw 80px}h1,h2,h3,p{margin:0 0 16px}h1{font-size:34px;letter-spacing:1px}h2{font-size:23px}h3{font-size:17px}.eyebrow{font-size:12px;letter-spacing:3px;color:var(--gold);margin-bottom:12px}.muted,small{color:var(--muted)}.card{background:linear-gradient(140deg,#20241d,#171a16);border:1px solid var(--line);border-radius:15px;padding:24px;margin-bottom:20px}.auth{max-width:480px;margin:25px auto}.auth h1{font-size:28px}label{display:block;margin:14px 0 6px;color:#c7cabb}input,select,textarea{width:100%;padding:12px;border:1px solid #454a3c;border-radius:7px;color:inherit;background:#11150f;font:inherit}button,.button{background:var(--gold);color:#201e15;border:0;border-radius:7px;padding:10px 17px;cursor:pointer;font:600 14px system-ui;white-space:nowrap;text-decoration:none;display:inline-block}button.secondary{background:#2b3026;color:#e1e3d7;border:1px solid #454b3c}button.danger{background:#402923;color:#ffd7c9}button:disabled{opacity:.45;cursor:wait}button:hover{filter:brightness(1.1)}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.between{justify-content:space-between}.wide{width:100%;margin-top:20px}.tabs{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0}.tabs button{background:#23281f;color:var(--muted);border:1px solid var(--line)}.tabs button.active{color:var(--gold);border-color:var(--gold)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.stat{font-size:36px;color:var(--gold)}.learning{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(280px,1fr);gap:24px}video{width:100%;max-height:65vh;background:#000;border-radius:10px}.lesson{padding:16px 0;border-bottom:1px solid var(--line);display:flex;gap:14px}.lesson:last-child{border:0}.number{color:var(--gold);font:24px Georgia;min-width:34px}.lesson-info{min-width:0;flex:1}.lesson-title{overflow-wrap:anywhere;font-weight:600}.tag{display:inline-block;padding:2px 8px;border:1px solid var(--line);color:var(--gold);border-radius:5px;font-size:12px}.empty{padding:38px 20px;text-align:center;color:var(--muted);border:1px dashed #454b3c;border-radius:12px}.toolbar{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}.toolbar input{flex:1;min-width:170px}.toolbar select{width:auto}.queue-item{padding:14px 0;border-bottom:1px solid var(--line);overflow-wrap:anywhere}progress{width:100%;height:12px;accent-color:var(--gold)}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;min-width:650px}th,td{text-align:left;padding:13px 9px;border-bottom:1px solid var(--line)}th{color:var(--muted);font-size:12px}td button{margin:3px;padding:7px 10px}details{margin:12px 0}summary{cursor:pointer;color:var(--gold)}#notice{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:13px 22px;background:#e2cf9f;color:#171a13;border-radius:9px;max-width:90vw;box-shadow:0 8px 30px #0008;display:none;z-index:10}.warning{color:var(--red);font-size:13px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-grid label{margin-top:0}.stack>*{margin-bottom:14px}.loading{padding:60px;text-align:center}.upload-zone{border:1px dashed #7f805e;padding:25px;border-radius:10px;background:#25291d}pre{white-space:pre-wrap;overflow-wrap:anywhere}a{color:var(--gold)}@media(max-width:850px){main{padding:26px 18px 60px}header{padding:0 18px;height:80px}.learning{grid-template-columns:1fr}.grid{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}h1{font-size:27px}.card{padding:18px}nav{gap:5px}nav button{padding:8px}.brand{font-size:24px} .lesson .row button{font-size:12px}}
.activation-dialog{color:#f1f0e7;background:linear-gradient(140deg,#20241d,#171a16);border:1px solid var(--gold);border-radius:16px;padding:30px;width:min(480px,calc(100vw - 32px));max-height:90vh;overflow:auto;box-shadow:0 24px 90px #000b}.activation-dialog::backdrop{background:#000b;backdrop-filter:blur(4px)}.activation-dialog h2{font-size:24px}.activation-dialog .warning{margin:12px 0 0;min-height:1.7em}.activation-dialog .wide{margin-top:12px}.activation-dialog input:focus{outline:2px solid var(--gold);outline-offset:2px}.button.secondary{background:#2b3026;color:#e1e3d7;border:1px solid #454b3c}@media(max-width:500px){.activation-dialog{padding:22px}nav .muted{max-width:76px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}nav a.button{padding:8px;font-size:12px}}
