:root{--bg:#0d1117;--panel:#161b22;--border:#30363d;--text:#e6edf3;--muted:#8b949e;--accent:#2f81f7;--danger:#f85149;color-scheme:dark}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--panel);position:-webkit-sticky;position:sticky;top:0;z-index:10}.topbar h1{font-size:1rem;margin:0;font-weight:600}.topbar .muted{color:var(--muted);font-weight:400}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,480px),1fr));grid-gap:16px;gap:16px;padding:16px}.tile{background:var(--panel);border:1px solid var(--border);border-radius:10px;overflow:hidden}.tile .head{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;border-bottom:1px solid var(--border)}.tile .name{font-weight:600}.dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:6px}.dot.online{background:#3fb950}.dot.offline{background:var(--danger)}.frame-wrap{position:relative;aspect-ratio:16/9;background:#000;display:flex;align-items:center;justify-content:center}.frame-wrap img{width:100%;height:100%;object-fit:contain;display:block}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:.9rem;background:rgba(0,0,0,.6)}.btn,button{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:8px 14px;font-size:.9rem;cursor:pointer}button.secondary{background:transparent;border:1px solid var(--border);color:var(--text)}button:disabled{opacity:.6;cursor:default}.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{width:100%;max-width:360px;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:28px}.login-card h1{margin:0 0 4px;font-size:1.25rem}.login-card p{margin:0 0 20px;color:var(--muted);font-size:.9rem}.login-card label{display:block;margin:12px 0 6px;font-size:.85rem;color:var(--muted)}.login-card input{width:100%;padding:10px 12px;border-radius:6px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:.95rem}.login-card button{width:100%;margin-top:20px;padding:11px}.error{color:var(--danger);font-size:.85rem;margin-top:12px;min-height:1em}