:root{--bg:#f6f7fb;--card:#fff;--ink:#0f172a;--mut:#64748b;--line:#e5e7ef;--pri:#4f46e5;--pri2:#eef2ff;--r:14px;color-scheme:light dark}
@media(prefers-color-scheme:dark){:root{--bg:#0b0f1a;--card:#131a2a;--ink:#e8ecf6;--mut:#8b97b0;--line:#222c42;--pri:#818cf8;--pri2:#1b2340}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:inherit;text-decoration:none}.muted{color:var(--mut)}small{display:block;font-size:12.5px}
.app{display:flex;min-height:100vh}.side{width:250px;background:var(--card);border-right:1px solid var(--line);padding:20px 14px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.brand{display:flex;gap:10px;align-items:center;padding:4px 8px 22px}.brand b{font-size:14px;display:block}.brand small{color:var(--mut)}
.logo{width:36px;height:36px;border-radius:10px;background:var(--pri);color:#fff;display:grid;place-items:center;font-weight:700;flex:none}.logo.big{width:52px;height:52px;font-size:22px;margin:0 auto 14px}
nav a{display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:10px;color:var(--mut);font-weight:500;margin-bottom:4px}
nav a svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
nav a:hover{background:var(--bg)}nav a.on{background:var(--pri2);color:var(--pri)}
.side-foot{margin-top:auto;padding:8px 12px;font-size:13px;color:var(--mut)}
.main{flex:1;min-width:0}.top{display:flex;align-items:center;gap:14px;padding:18px 32px;background:var(--card);border-bottom:1px solid var(--line)}
.top h1{margin:0;font-size:18px}.top p{margin:0;color:var(--mut);font-size:13px}.pill{margin-left:auto;background:var(--pri2);color:var(--pri);padding:5px 12px;border-radius:99px;font-size:12px;font-weight:600}
.burger{display:none;background:none;border:0;font-size:22px;color:var(--ink)}.body{padding:28px 32px;max-width:1200px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:0 1px 2px rgba(15,23,42,.04)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.stat b{font-size:30px;display:block;margin-top:4px}.sec{font-size:15px;margin:30px 0 12px}
.row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.btn{display:inline-block;padding:8px 16px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-weight:600;font-size:13.5px;cursor:pointer}
.btn:hover{border-color:var(--pri)}.btn.primary{background:var(--pri);border-color:var(--pri);color:#fff}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.tab{padding:8px 14px;border-radius:99px;border:1px solid var(--line);background:var(--card);font-size:13.5px;color:var(--mut)}
.tab.on{background:var(--pri);border-color:var(--pri);color:#fff}
.viewer{padding:0;overflow:hidden}.vbar{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;border-bottom:1px solid var(--line)}
iframe.doc{width:100%;height:75vh;border:0;background:#fff}.stage{background:#0b0f1a;display:grid;place-items:center;min-height:50vh}
.stage img{max-width:100%;max-height:75vh;user-select:none}.ctrl{display:flex;gap:10px;justify-content:center;padding:14px}
.empty{text-align:center;color:var(--mut);padding:48px}.auth{display:grid;place-items:center;min-height:100vh}
.auth-card{width:min(380px,92vw);padding:32px;text-align:center}.auth-card h2{margin:0 0 4px}.auth-card label{display:block;text-align:left;margin:18px 0;font-weight:600;font-size:13px}
.auth-card input{width:100%;margin-top:6px;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);font:inherit}
.auth-card .btn{width:100%;padding:11px}.alert{background:#fef2f2;color:#b91c1c;padding:9px;border-radius:10px;margin-top:14px;font-size:13px}
@media(max-width:860px){.side{position:fixed;left:-260px;z-index:10;transition:.2s}.side.open{left:0}.burger{display:block}.grid3,.grid2{grid-template-columns:1fr}.body,.top{padding:18px}}