*,:before,:after{box-sizing:border-box}:root{--bg:#f1f5f9;--surface:#fff;--surface-raised:#f8fafc;--border:#e2e8f0;--text:#334155;--text-muted:#64748b;--heading:#0f172a;--primary:#7c3aed;--primary-hover:#6d28d9;--primary-light:#f5f3ff;--danger:#dc2626;--danger-light:#fef2f2;--success:#16a34a;--success-light:#f0fdf4;--radius:8px;--shadow:0 1px 3px #00000014, 0 1px 2px #0000000a}[data-theme=dark]{--bg:#0f172a;--surface:#1e293b;--surface-raised:#263347;--border:#334155;--text:#cbd5e1;--text-muted:#64748b;--heading:#f1f5f9;--primary:#a78bfa;--primary-hover:#8b5cf6;--primary-light:#a78bfa1f;--danger:#f87171;--danger-light:#f871711f;--success:#4ade80;--success-light:#4ade801f;--shadow:0 1px 3px #0000004d, 0 1px 2px #0003}body{color:var(--text);background:var(--bg);margin:0;font:15px/1.6 system-ui,sans-serif}#root{min-height:100vh}h1,h2,h3{color:var(--heading);margin:0 0 8px;font-weight:600}h1{font-size:24px}h2{font-size:18px}h3{font-size:15px}p{margin:0}.page{max-width:960px;margin:0 auto;padding:24px 16px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.card+.card{margin-top:16px}.btn{border-radius:var(--radius);cursor:pointer;border:1px solid #0000;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:500;transition:background .15s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-ghost{color:var(--text);border-color:var(--border);background:0 0}.btn-ghost:hover:not(:disabled){background:var(--bg)}.btn-danger{background:var(--danger);color:#fff}.btn-sm{padding:4px 10px;font-size:13px}.form-group{flex-direction:column;gap:4px;margin-bottom:14px;display:flex}.form-group label{color:var(--heading);font-size:13px;font-weight:500}.input{border:1px solid var(--border);border-radius:var(--radius);color:var(--heading);background:var(--surface);outline:none;width:100%;padding:8px 12px;font-size:14px;transition:border-color .15s}.input:focus{border-color:var(--primary)}select.input{cursor:pointer}.form-row{grid-template-columns:1fr 1fr;gap:12px;display:grid}.navbar{background:var(--surface);border-bottom:1px solid var(--border);z-index:10;justify-content:space-between;align-items:center;height:56px;padding:0 24px;display:flex;position:sticky;top:0}.navbar-brand{color:var(--heading);font-size:18px;font-weight:700}.navbar-brand span{color:var(--primary)}.nav-links{gap:4px;display:flex}.nav-link{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:6px 12px;font-size:14px;font-weight:500}.nav-link:hover,.nav-link.active{background:var(--primary-light);color:var(--primary)}.auth-wrap{justify-content:center;align-items:center;min-height:100vh;display:flex}.auth-card{width:100%;max-width:360px}.alert{border-radius:var(--radius);margin-bottom:14px;padding:10px 14px;font-size:14px}.alert-error{background:var(--danger-light);color:var(--danger);border:1px solid #fecaca}.alert-success{background:var(--success-light);color:var(--success)}table{border-collapse:collapse;width:100%;font-size:14px}th{text-align:left;background:var(--bg);border-bottom:2px solid var(--border);color:var(--heading);white-space:nowrap;padding:10px 12px;font-weight:600}td{border-bottom:1px solid var(--border);vertical-align:top;padding:10px 12px}tr:last-child td{border-bottom:none}tr:hover td{background:var(--surface-raised)}.badge{border-radius:20px;padding:2px 8px;font-size:12px;font-weight:600;display:inline-block}.badge-live{color:#ca8a04;background:#eab30826}[data-theme=dark] .badge-live{color:#fbbf24}.badge-scheduled{background:var(--primary-light);color:var(--primary)}.badge-ended{background:var(--bg);color:var(--text-muted);border:1px solid var(--border)}.badge-easy{color:#16a34a;background:#16a34a1f}[data-theme=dark] .badge-easy{color:#4ade80}.badge-medium{color:#ca8a04;background:#eab30826}[data-theme=dark] .badge-medium{color:#fbbf24}.badge-hard{color:#dc2626;background:#dc26261f}[data-theme=dark] .badge-hard{color:#f87171}.page-header{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.empty{text-align:center;color:var(--text-muted);padding:40px;font-size:14px}.contests-section-header{color:var(--heading);background:var(--bg);border-bottom:1px solid var(--border);border-radius:var(--radius) var(--radius) 0 0;border-left:4px solid var(--primary);align-items:center;gap:10px;padding:12px 20px;font-size:14px;font-weight:700;display:flex}.contests-section-header-muted{border-left-color:var(--border);color:var(--text-muted)}.contests-section-count{background:var(--primary-light);color:var(--primary);border-radius:20px;padding:2px 8px;font-size:11px;font-weight:700}.contests-section-header-muted .contests-section-count{background:var(--bg);color:var(--text-muted);border:1px solid var(--border)}.tab-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-1px;padding:10px 16px;font-size:14px;font-weight:500;transition:color .15s,border-color .15s}.tab-btn:hover{color:var(--heading)}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}.admin-timer-banner{border-radius:var(--radius);border:1px solid var(--border);align-items:center;gap:20px;margin-bottom:4px;padding:16px 20px;display:flex}.admin-timer-label{text-transform:uppercase;letter-spacing:.5px;opacity:.75;margin-bottom:2px;font-size:11px;font-weight:600}.admin-timer-value{font-variant-numeric:tabular-nums;letter-spacing:1px;font-size:32px;font-weight:700;line-height:1}.admin-timer-meta{flex-direction:column;gap:2px;font-size:13px;display:flex}.admin-timer-scheduled{background:var(--primary-light);color:var(--primary);border-color:#bfdbfe}.admin-timer-scheduled .admin-timer-meta{color:var(--primary)}.admin-timer-live{color:#ca8a04;background:#eab3081f;border-color:#eab30859}[data-theme=dark] .admin-timer-live{color:#fbbf24}.admin-timer-live .admin-timer-value{color:#c2410c}[data-theme=dark] .admin-timer-live .admin-timer-value{color:#fb923c}.admin-timer-ended{background:var(--bg);border-color:var(--border);color:var(--text-muted)}.admin-timer-ended .admin-timer-value{color:var(--heading)}.admin-progress-track{background:#0000001a;border-radius:99px;height:6px;overflow:hidden}.admin-progress-fill{background:#f59e0b;border-radius:99px;height:100%;transition:width 1s linear}.section-config-grid{grid-template-columns:repeat(4,1fr);gap:12px;margin-top:14px;display:grid}.section-config-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:14px}.section-config-name{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px;font-size:12px;font-weight:600}.section-config-stats{gap:12px;display:flex}.section-stat{flex-direction:column;align-items:center;display:flex}.section-stat-val{color:var(--heading);font-size:22px;font-weight:700;line-height:1}.section-stat-label{color:var(--text-muted);margin-top:2px;font-size:11px}.section-limits-grid{grid-template-columns:repeat(4,1fr);gap:12px;display:grid}.section-limit-item{flex-direction:column;gap:4px;display:flex}.section-limit-label{color:var(--text-muted);font-size:12px;font-weight:600}.section-limit-unit{color:var(--text-muted);text-align:right;font-size:12px}