:root{--bg: #f5f6fa;--surface: #ffffff;--border: #e2e5ec;--text: #14161f;--text-muted: #6b7180;--primary: #4f46e5;--primary-hover: #4338ca;--danger: #dc2626;--danger-bg: #fef2f2;--info-bg: #eef2ff;--success: #16a34a;--radius: 12px;--sidebar-w: 240px;color-scheme:light}@media (prefers-color-scheme: dark){:root{--bg: #0f1115;--surface: #171a21;--border: #262a35;--text: #eef0f5;--text-muted: #9297a6;--primary: #6366f1;--primary-hover: #7c7ff0;--danger-bg: #3a1414;--info-bg: #1a1d3a;color-scheme:dark}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,Segoe UI,Roboto,Inter,sans-serif}a{color:var(--primary);text-decoration:none}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:0 8px 30px #0000000f}.brand{display:flex;align-items:center;gap:10px}.brand-center{justify-content:center;margin-bottom:20px}.brand-mark{width:40px;height:40px;object-fit:contain;flex-shrink:0}.brand-text{display:flex;flex-direction:column;line-height:1.15}.brand-name{font-weight:800;font-size:17px;letter-spacing:.02em}.brand-subtitle{font-size:10px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em}.auth-title{font-size:22px;margin:0 0 4px;text-align:center}.auth-subtitle{text-align:center;color:var(--text-muted);font-size:14px;margin:0 0 24px}.auth-footnote{text-align:center;font-size:13px;color:var(--text-muted);margin-top:16px}.form{display:flex;flex-direction:column;gap:16px}.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--text-muted)}.field input{font-size:15px;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text)}.field input:focus{outline:2px solid var(--primary);outline-offset:1px}.otp-input{letter-spacing:6px;font-weight:700;text-align:center}.btn{border:1px solid transparent;border-radius:8px;padding:10px 16px;font-size:14px;font-weight:600;cursor:pointer}.btn-block{width:100%}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-secondary{background:var(--bg);border-color:var(--border);color:var(--text)}.btn-ghost{background:transparent;color:var(--text-muted)}.btn:disabled{opacity:.6;cursor:not-allowed}.alert{border-radius:8px;padding:10px 14px;font-size:13px}.alert-error{background:var(--danger-bg);color:var(--danger)}.alert-info{background:var(--info-bg);color:var(--primary)}.app-shell{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:20px}.nav{display:flex;flex-direction:column;gap:4px;margin-top:28px}.nav-link{padding:10px 12px;border-radius:8px;color:var(--text-muted);font-size:14px;font-weight:500}.nav-link.active{background:var(--info-bg);color:var(--primary)}.sidebar-footer{margin-top:auto;display:flex;flex-direction:column;gap:12px}.user-chip{display:flex;align-items:center;gap:10px}.avatar{width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0}.user-name{font-size:13px;font-weight:600}.user-email{font-size:12px;color:var(--text-muted)}.content{flex:1;padding:32px;min-width:0}.platform-banner{background:var(--info-bg);color:var(--primary);border-radius:8px;padding:8px 14px;font-size:13px;margin-bottom:20px;display:inline-block}.page-header{margin-bottom:24px}.page-header h1{margin:0 0 4px;font-size:24px}.page-subtitle{color:var(--text-muted);margin:0;font-size:14px}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px}.card h3{margin:0 0 8px;font-size:15px}.card p{margin:0;color:var(--text-muted);font-size:13px;line-height:1.5}.badge{display:inline-block;margin-top:10px;background:var(--info-bg);color:var(--primary);font-size:11px;font-weight:700;padding:3px 8px;border-radius:999px;text-transform:uppercase;letter-spacing:.03em}.kv-row{display:flex;justify-content:space-between;font-size:14px;padding:8px 0;border-bottom:1px solid var(--border)}.kv-row:last-child{border-bottom:none}.switch-row{display:flex;justify-content:space-between;align-items:center;font-size:14px;margin-top:12px}.device-list{display:flex;flex-direction:column;gap:12px}.device-row{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px}.device-icon{font-size:24px}.device-info{flex:1}.device-name{font-weight:600;font-size:14px}.device-meta{font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:6px;margin-top:4px}.status-dot{width:8px;height:8px;border-radius:50%;background:var(--text-muted)}.status-dot.online{background:var(--success)}.device-actions{display:flex;flex-direction:column;align-items:flex-end;gap:4px}.download-list{display:flex;flex-direction:column;gap:12px}.download-row{display:flex;align-items:center;justify-content:space-between;border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;color:var(--text)}.download-label{font-weight:600;font-size:14px}.download-desc{font-size:12px;color:var(--text-muted);margin-top:2px}.fullscreen-center{min-height:100vh;display:flex;align-items:center;justify-content:center}.spinner{width:28px;height:28px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--primary);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.control-page{min-height:100vh;display:flex;flex-direction:column;background:#000;color:#fff;padding:12px;gap:10px}.control-topbar{display:flex;align-items:center;justify-content:space-between;gap:12px}.control-topbar .btn-ghost{color:#fff}.control-alert{margin:0}.status-pill{font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;background:#333}.status-connected{background:#16a34a;color:#fff}.status-connecting,.status-starting{background:var(--primary);color:#fff}.status-failed{background:var(--danger);color:#fff}.status-ended{background:#555;color:#fff}.control-stage{position:relative;flex:1;border-radius:12px;overflow:hidden;background:#111;outline:none}.control-video{width:100%;height:100%;object-fit:contain;display:block;cursor:crosshair;touch-action:none}.control-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:#0009;text-align:center;padding:24px}.control-hint{text-align:center;color:#aaa;font-size:12px;margin:0}.host-banner{position:fixed;bottom:16px;left:50%;transform:translate(-50%);background:var(--primary);color:#fff;padding:10px 16px;border-radius:999px;display:flex;align-items:center;gap:12px;font-size:13px;font-weight:600;box-shadow:0 8px 24px #00000040;z-index:999}.host-banner .btn{padding:6px 12px;font-size:12px}@media (max-width: 720px){.app-shell{flex-direction:column}.sidebar{width:100%;border-right:none;border-bottom:1px solid var(--border);flex-direction:row;align-items:center;flex-wrap:wrap}.nav{flex-direction:row;margin-top:0}.sidebar-footer{margin-top:0;margin-left:auto;flex-direction:row;align-items:center}.content{padding:20px}}