:root {
  --bg-deep: #06080c;
  --bg-panel: #0d1117;
  --bg-card: #151b25;
  --bg-card-hover: #1a2233;
  --bg-input: #0d1117;
  --border: #21283666;
  --accent: #f76826;
  --accent-dim: #f7682633;
  --accent-glow: #f7682622;
  --accent2: #22d3ee;
  --accent2-dim: #22d3ee33;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --text-muted: #484f58;
  --success: #3fb950;
  --danger: #f85149;
  --gold: #f0c040;
  --silver: #a0b0c0;
  --bronze: #cd7f32;
  --radius: 12px;
  --radius-sm: 8px;
  --font-display: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:var(--font-display); background:var(--bg-deep); color:var(--text); min-height:100vh; overflow-x:hidden; }
body::before { content:''; position:fixed; inset:0; background:radial-gradient(ellipse 80% 50% at 20% 0%,#f7682610 0%,transparent 60%),radial-gradient(ellipse 60% 40% at 80% 100%,#22d3ee08 0%,transparent 60%); pointer-events:none; z-index:0; }
.grain { position:fixed; inset:0; opacity:0.025; background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); pointer-events:none; z-index:0; }

::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--text-muted); border-radius:3px; }

.app { position:relative; z-index:1; }

/* Header */
.header { display:flex; align-items:center; justify-content:space-between; padding:16px 28px; border-bottom:1px solid var(--border); backdrop-filter:blur(20px); background:#06080ccc; position:sticky; top:0; z-index:100; }
.logo { display:flex; align-items:center; gap:10px; font-weight:800; font-size:1.2rem; letter-spacing:-0.02em; }
.logo-icon { width:32px; height:32px; background:linear-gradient(135deg,var(--accent),#ff9d5c); border-radius:8px; display:grid; place-items:center; font-size:16px; box-shadow:0 0 20px var(--accent-dim); }
.nav { display:flex; gap:4px; background:var(--bg-panel); border-radius:var(--radius); padding:3px; border:1px solid var(--border); }
.nav-btn { padding:8px 14px; border:none; background:transparent; color:var(--text-dim); font-family:var(--font-display); font-size:0.82rem; font-weight:500; border-radius:var(--radius-sm); cursor:pointer; transition:all 0.2s; white-space:nowrap; }
.nav-btn:hover { color:var(--text); background:var(--bg-card); }
.nav-btn.active { color:var(--text); background:var(--bg-card); box-shadow:0 0 12px #00000040; }
.user-bar { display:flex; align-items:center; gap:12px; }
.user-email { font-size:0.8rem; color:var(--text-dim); font-family:var(--font-mono); }

/* Buttons */
.btn { padding:8px 18px; border:1px solid var(--border); background:var(--bg-card); color:var(--text); font-family:var(--font-display); font-size:0.85rem; font-weight:500; border-radius:var(--radius-sm); cursor:pointer; transition:all 0.2s; }
.btn:hover { background:var(--bg-card-hover); border-color:var(--text-muted); }
.btn-accent { background:var(--accent); border-color:var(--accent); color:#fff; font-weight:600; }
.btn-accent:hover { background:#e55a1a; border-color:#e55a1a; }
.btn-sm { padding:6px 12px; font-size:0.8rem; }
.btn-danger { border-color:var(--danger); color:var(--danger); }
.btn-danger:hover { background:#f8514920; }

/* Pages */
.page { display:none; padding:28px; max-width:1200px; margin:0 auto; }
.page.active { display:block; }

/* Auth */
.auth-container { max-width:400px; margin:80px auto; text-align:center; }
.auth-container h1 { font-size:2.4rem; font-weight:800; letter-spacing:-0.03em; margin-bottom:8px; background:linear-gradient(135deg,var(--text),var(--accent)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.auth-container p { color:var(--text-dim); margin-bottom:32px; font-size:0.95rem; line-height:1.5; }
.auth-box { background:var(--bg-panel); border:1px solid var(--border); border-radius:var(--radius); padding:32px; text-align:left; }
.auth-tabs { display:flex; gap:4px; background:var(--bg-deep); border-radius:var(--radius-sm); padding:3px; margin-bottom:24px; }
.auth-tab { flex:1; padding:8px; border:none; background:transparent; color:var(--text-dim); font-family:var(--font-display); font-size:0.85rem; font-weight:500; border-radius:6px; cursor:pointer; transition:all 0.2s; }
.auth-tab.active { background:var(--bg-card); color:var(--text); }

/* Forms */
.form-group { margin-bottom:16px; }
.form-group label { display:block; font-size:0.78rem; font-weight:600; color:var(--text-dim); margin-bottom:6px; text-transform:uppercase; letter-spacing:0.06em; }
.form-input, .form-select, .form-textarea { width:100%; padding:10px 14px; background:var(--bg-input); border:1px solid var(--border); border-radius:var(--radius-sm); color:var(--text); font-family:var(--font-mono); font-size:0.9rem; transition:border-color 0.2s; outline:none; }
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-glow); }
.form-select { font-family:var(--font-display); cursor:pointer; appearance:none; background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b949e' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E"); background-repeat:no-repeat; background-position:right 12px center; }
.form-select option { background:var(--bg-panel); color:var(--text); }
.form-textarea { font-family:var(--font-display); resize:vertical; min-height:70px; line-height:1.5; }
.auth-submit { width:100%; padding:12px; margin-top:8px; }
.auth-msg { margin-top:12px; font-size:0.82rem; text-align:center; min-height:20px; }
.auth-msg.error { color:var(--danger); }
.auth-msg.ok { color:var(--success); }

/* Section */
.section-title { font-size:1.4rem; font-weight:700; letter-spacing:-0.02em; margin-bottom:20px; }
.section-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:20px; flex-wrap:wrap; gap:10px; }

/* Arena */
.task-input-area { background:var(--bg-panel); border:1px solid var(--border); border-radius:var(--radius); padding:24px; margin-bottom:28px; }
.task-input-area textarea { width:100%; min-height:90px; background:var(--bg-input); border:1px solid var(--border); border-radius:var(--radius-sm); color:var(--text); font-family:var(--font-display); font-size:0.95rem; padding:14px; resize:vertical; outline:none; transition:border-color 0.2s; line-height:1.5; }
.task-input-area textarea:focus { border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-glow); }
.task-controls { display:flex; align-items:center; justify-content:space-between; margin-top:14px; flex-wrap:wrap; gap:10px; }
.agent-selector { display:flex; gap:8px; flex-wrap:wrap; }
.agent-chip { padding:6px 14px; border:1px solid var(--border); background:var(--bg-card); border-radius:20px; font-size:0.8rem; font-weight:500; cursor:pointer; transition:all 0.2s; user-select:none; color:var(--text-dim); }
.agent-chip.selected { border-color:var(--accent); color:var(--accent); background:var(--accent-dim); }
.agent-chip:hover:not(.selected) { border-color:var(--text-muted); color:var(--text); }

/* Results */
.results-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(340px,1fr)); gap:16px; margin-top:24px; }
.result-card { background:var(--bg-panel); border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; transition:border-color 0.3s; }
.result-card:hover { border-color:var(--text-muted); }
.result-header { padding:14px 18px; display:flex; align-items:center; justify-content:space-between; border-bottom:1px solid var(--border); }
.result-agent { font-weight:700; font-size:0.95rem; display:flex; align-items:center; gap:8px; }
.agent-dot { width:8px; height:8px; border-radius:50%; display:inline-block; }
.result-time { font-size:0.75rem; color:var(--text-muted); font-family:var(--font-mono); }
.result-body { padding:18px; font-size:0.88rem; line-height:1.7; color:var(--text-dim); max-height:320px; overflow-y:auto; white-space:pre-wrap; font-family:var(--font-display); }
.result-footer { padding:12px 18px; border-top:1px solid var(--border); display:flex; gap:6px; }
.rate-btn { padding:5px 12px; border:1px solid var(--border); background:var(--bg-card); border-radius:6px; font-size:0.78rem; cursor:pointer; transition:all 0.2s; color:var(--text-dim); font-family:var(--font-display); }
.rate-btn:hover { border-color:var(--gold); color:var(--gold); }
.rate-btn.rated { border-color:var(--gold); color:var(--gold); background:#f0c04015; pointer-events:none; }

/* Loading */
.loading-bar { height:3px; background:var(--bg-card); border-radius:2px; overflow:hidden; margin-top:20px; display:none; }
.loading-bar.active { display:block; }
.loading-bar::after { content:''; display:block; height:100%; width:30%; background:linear-gradient(90deg,var(--accent),var(--accent2)); border-radius:2px; animation:loadSlide 1.2s ease-in-out infinite; }
@keyframes loadSlide { 0%{transform:translateX(-100%)} 100%{transform:translateX(430%)} }

/* History */
.history-list { display:flex; flex-direction:column; gap:12px; }
.history-item { background:var(--bg-panel); border:1px solid var(--border); border-radius:var(--radius); padding:18px; cursor:pointer; transition:all 0.2s; }
.history-item:hover { border-color:var(--text-muted); background:var(--bg-card); }
.history-meta { display:flex; align-items:center; justify-content:space-between; margin-bottom:8px; }
.history-date { font-size:0.75rem; color:var(--text-muted); font-family:var(--font-mono); }
.history-agents { display:flex; gap:4px; flex-wrap:wrap; }
.history-agent-badge { padding:2px 8px; border-radius:10px; font-size:0.7rem; font-weight:600; background:var(--accent-dim); color:var(--accent); }
.history-task-text { font-size:0.9rem; color:var(--text-dim); line-height:1.5; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.empty-state { text-align:center; padding:60px 20px; color:var(--text-muted); }
.empty-state .empty-icon { font-size:3rem; margin-bottom:16px; }

/* Rating */
.rating-table { width:100%; border-collapse:collapse; }
.rating-table th { text-align:left; padding:12px 16px; font-size:0.75rem; font-weight:600; color:var(--text-muted); text-transform:uppercase; letter-spacing:0.08em; border-bottom:1px solid var(--border); }
.rating-table td { padding:14px 16px; border-bottom:1px solid var(--border); font-size:0.9rem; }
.rating-table tr:hover td { background:var(--bg-card); }
.rank-cell { font-weight:800; font-size:1.1rem; width:50px; }
.rank-1 { color:var(--gold); } .rank-2 { color:var(--silver); } .rank-3 { color:var(--bronze); }
.bar-cell { width:200px; }
.rating-bar-bg { height:8px; background:var(--bg-deep); border-radius:4px; overflow:hidden; }
.rating-bar-fill { height:100%; border-radius:4px; background:linear-gradient(90deg,var(--accent),var(--accent2)); transition:width 0.6s ease; }
.avg-score { font-family:var(--font-mono); font-weight:700; color:var(--accent); }
.votes-count { font-family:var(--font-mono); color:var(--text-muted); font-size:0.82rem; }

/* Overlays */
.overlay { display:none; position:fixed; inset:0; background:#000000aa; backdrop-filter:blur(8px); z-index:200; padding:40px 20px; overflow-y:auto; }
.overlay.active { display:block; }
.overlay-panel { max-width:900px; margin:0 auto; background:var(--bg-panel); border:1px solid var(--border); border-radius:var(--radius); padding:28px; }
.overlay-panel-sm { max-width:560px; }
.detail-close { float:right; background:none; border:none; color:var(--text-muted); font-size:1.4rem; cursor:pointer; line-height:1; }
.detail-close:hover { color:var(--text); }
.detail-task-text { font-size:1rem; line-height:1.6; color:var(--text); margin:16px 0 24px; padding:14px; background:var(--bg-deep); border-radius:var(--radius-sm); white-space:pre-wrap; }

/* Agents */
.agents-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:16px; }
.agent-card { background:var(--bg-panel); border:1px solid var(--border); border-radius:var(--radius); padding:20px; transition:border-color 0.2s; }
.agent-card:hover { border-color:var(--text-muted); }
.agent-card-top { display:flex; align-items:center; gap:12px; margin-bottom:12px; }
.agent-card-emoji { width:44px; height:44px; border-radius:10px; display:grid; place-items:center; font-size:22px; }
.agent-card-info h3 { font-size:1rem; font-weight:700; }
.agent-card-info .agent-model-badge { font-size:0.72rem; font-family:var(--font-mono); color:var(--accent2); background:var(--accent2-dim); padding:2px 8px; border-radius:6px; display:inline-block; margin-top:4px; }
.agent-card-desc { font-size:0.84rem; color:var(--text-dim); line-height:1.5; margin-bottom:12px; min-height:20px; }
.agent-card-prompt { font-size:0.78rem; color:var(--text-muted); font-family:var(--font-mono); background:var(--bg-deep); padding:10px; border-radius:var(--radius-sm); max-height:60px; overflow:hidden; margin-bottom:12px; white-space:pre-wrap; }
.agent-card-actions { display:flex; gap:8px; }
.form-row { display:flex; gap:12px; }
.form-row .form-group { flex:1; }
.color-wrap { display:flex; align-items:center; gap:10px; }
.color-wrap input[type=color] { width:40px; height:36px; border:1px solid var(--border); border-radius:6px; background:var(--bg-input); cursor:pointer; padding:2px; }
.form-actions { display:flex; gap:10px; margin-top:20px; }
.form-actions .btn { flex:1; }

/* Responsive */
@media (max-width:700px) {
  .header { flex-wrap:wrap; gap:10px; padding:12px 16px; }
  .nav { order:3; width:100%; overflow-x:auto; }
  .nav-btn { flex:1; text-align:center; font-size:0.72rem; padding:8px 4px; }
  .page { padding:16px; }
  .results-grid, .agents-grid { grid-template-columns:1fr; }
  .auth-container { margin:40px auto; }
  .user-email { display:none; }
  .form-row { flex-direction:column; gap:0; }
  .debate-sb-agent { min-width:80px; font-size:0.72rem; }
  .debate-sb-score { min-width:50px; font-size:0.72rem; }
  .debate-score-label { min-width:80px; font-size:0.75rem; }
}

/* Animations */
@keyframes fadeUp { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:translateY(0)} }
.fade-up { animation:fadeUp 0.4s ease forwards; }
.result-card { animation:fadeUp 0.4s ease backwards; }
.result-card:nth-child(1) { animation-delay:0.05s; }
.result-card:nth-child(2) { animation-delay:0.15s; }
.result-card:nth-child(3) { animation-delay:0.25s; }
.agent-card { animation:fadeUp 0.3s ease backwards; }
.agent-card:nth-child(1) { animation-delay:0.05s; }
.agent-card:nth-child(2) { animation-delay:0.1s; }
.agent-card:nth-child(3) { animation-delay:0.15s; }