/* ============================================
   QUANTUM LABS v2 — Premium UI Enhancements
   Layered on top of labs.css
   ============================================ */

/* ── Hero Enhancements ─────────────────────── */
.labs-hero { padding: 130px 0 70px; background: linear-gradient(160deg, #0a0e1a 0%, #0d1117 40%, #111827 100%); }
.labs-hero-orb--1 { background: radial-gradient(circle, rgba(56,189,248,0.12) 0%, transparent 70%); }
.labs-hero-orb--2 { background: radial-gradient(circle, rgba(139,92,246,0.10) 0%, transparent 70%); }
.labs-hero-orb--3 { position:absolute; width:350px; height:350px; top:40%; left:50%; border-radius:50%; filter:blur(100px); background:radial-gradient(circle,rgba(16,185,129,0.08) 0%,transparent 70%); animation:heroPulse 12s ease-in-out infinite; }
.labs-hero-grid { background: linear-gradient(rgba(56,189,248,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(56,189,248,0.03) 1px, transparent 1px); background-size:50px 50px; }
.labs-hero-particles { position:absolute; inset:0; z-index:0; pointer-events:none; }
.labs-hero-badge { background:rgba(56,189,248,0.08); border:1px solid rgba(56,189,248,0.25); color:#38bdf8; }
.labs-hero-title { font-size:clamp(2.2rem,5vw,3.5rem); letter-spacing:-0.02em; }
.labs-hero-title .text-gradient { background:linear-gradient(135deg,#38bdf8,#818cf8,#a78bfa); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.labs-hero-subtitle { font-size:1.05rem; max-width:560px; }

/* ── Stats Grid ────────────────────────────── */
.labs-stats-grid { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-bottom:var(--space-xl); }
.labs-stat-card { display:flex; flex-direction:column; align-items:center; gap:4px; background:rgba(255,255,255,0.04); border:1px solid rgba(255,255,255,0.08); border-radius:14px; padding:16px 24px; min-width:100px; backdrop-filter:blur(12px); transition:all .3s ease; }
.labs-stat-card:hover { border-color:rgba(56,189,248,0.3); transform:translateY(-2px); background:rgba(255,255,255,0.06); }
.labs-stat-icon { width:36px; height:36px; border-radius:10px; display:flex; align-items:center; justify-content:center; margin-bottom:2px; }
.labs-stat-icon i { width:18px; height:18px; }
.labs-stat-icon--total { background:rgba(56,189,248,0.12); color:#38bdf8; }
.labs-stat-icon--beginner { background:rgba(0,230,118,0.12); color:#00e676; }
.labs-stat-icon--intermediate { background:rgba(255,171,0,0.12); color:#ffab00; }
.labs-stat-icon--advanced { background:rgba(255,23,68,0.12); color:#ff1744; }
.labs-stat-icon--solved { background:rgba(0,230,118,0.12); color:#00e676; }
.labs-stat-number { font-family:var(--font-display); font-size:1.6rem; font-weight:800; color:var(--text-primary); }
.labs-stat-beginner { color:#00e676 !important; }
.labs-stat-intermediate { color:#ffab00 !important; }
.labs-stat-advanced { color:#ff1744 !important; }

/* ── Action Buttons ────────────────────────── */
.labs-hero-actions { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; }
.labs-action-btn { display:inline-flex; align-items:center; gap:8px; padding:12px 28px; border-radius:12px; font-size:0.9rem; font-weight:600; text-decoration:none; transition:all .3s ease; cursor:pointer; border:none; }
.labs-action-btn i { width:18px; height:18px; }
.labs-action-btn--primary { background:linear-gradient(135deg,#38bdf8,#818cf8); color:#fff; box-shadow:0 4px 20px rgba(56,189,248,0.3); }
.labs-action-btn--primary:hover { transform:translateY(-2px); box-shadow:0 8px 30px rgba(56,189,248,0.4); text-shadow:none; }
.labs-action-btn--secondary { background:rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.12); color:var(--text-primary); }
.labs-action-btn--secondary:hover { background:rgba(255,255,255,0.1); border-color:rgba(56,189,248,0.3); transform:translateY(-2px); text-shadow:none; }
.labs-action-btn--ghost { background:transparent; color:var(--text-secondary); }
.labs-action-btn--ghost:hover { color:var(--text-primary); text-shadow:none; }

/* ── Card Grid Layout ──────────────────────── */
.labs-grid-cards { display:grid; grid-template-columns:repeat(auto-fill, minmax(300px, 1fr)); gap:16px; }
.labs-grid-cards--compact { grid-template-columns:repeat(auto-fill, minmax(280px, 1fr)); }

.lab-grid-card { background:rgba(255,255,255,0.03); border:1px solid rgba(255,255,255,0.07); border-radius:16px; padding:20px; display:flex; flex-direction:column; gap:10px; transition:all .35s cubic-bezier(.4,0,.2,1); position:relative; overflow:hidden; }
.lab-grid-card::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background:linear-gradient(90deg,#38bdf8,#818cf8); opacity:0; transition:opacity .3s ease; }
.lab-grid-card:hover { border-color:rgba(56,189,248,0.25); background:rgba(255,255,255,0.06); transform:translateY(-4px); box-shadow:0 12px 40px rgba(0,0,0,0.3), 0 0 0 1px rgba(56,189,248,0.1); }
.lab-grid-card:hover::before { opacity:1; }
.lab-grid-card--solved { border-left:3px solid #00e676; }
.lab-grid-card--solved::before { background:linear-gradient(90deg,#00e676,#10b981); }

.lab-grid-card-header { display:flex; align-items:center; justify-content:space-between; }
.lab-grid-solved-icon { color:#00e676; }
.lab-grid-solved-icon i { width:18px; height:18px; }

.lab-grid-card-title { font-size:1rem; font-weight:700; margin:0; line-height:1.4; }
.lab-grid-card-title a { color:var(--text-primary); text-decoration:none; transition:color .2s; }
.lab-grid-card-title a:hover { color:#38bdf8; text-shadow:none; }

.lab-grid-card-desc { font-size:0.82rem; color:var(--text-secondary); line-height:1.6; margin:0; flex:1; display:-webkit-box; -webkit-line-clamp:2; line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }

.lab-grid-card-footer { display:flex; align-items:center; justify-content:space-between; margin-top:auto; padding-top:12px; border-top:1px solid rgba(255,255,255,0.06); }
.lab-grid-xp { display:flex; align-items:center; gap:4px; font-family:var(--font-mono); font-weight:700; color:#fbbf24; font-size:0.82rem; }
.lab-grid-xp i { width:14px; height:14px; }
.lab-grid-status--solved { display:flex; align-items:center; gap:4px; color:#00e676; font-size:0.8rem; font-weight:600; }
.lab-grid-status--solved i { width:14px; height:14px; }

.lab-grid-start-btn { display:inline-flex; align-items:center; gap:6px; padding:6px 16px; border-radius:8px; background:linear-gradient(135deg,#38bdf8,#818cf8); color:#fff; font-size:0.8rem; font-weight:600; text-decoration:none; transition:all .25s ease; }
.lab-grid-start-btn:hover { transform:scale(1.05); box-shadow:0 4px 15px rgba(56,189,248,0.3); text-shadow:none; }
.lab-grid-start-btn i { width:14px; height:14px; }

/* ── Difficulty Badges (Quantum) ───────────── */
.lab-difficulty--beginner { background:rgba(0,230,118,0.1); color:#00e676; border:1px solid rgba(0,230,118,0.25); }
.lab-difficulty--intermediate { background:rgba(255,171,0,0.1); color:#ffab00; border:1px solid rgba(255,171,0,0.25); }
.lab-difficulty--advanced { background:rgba(255,23,68,0.1); color:#ff1744; border:1px solid rgba(255,23,68,0.25); }

/* ── Category Headers (Enhanced) ───────────── */
.labs-category-icon-wrap { width:40px; height:40px; border-radius:12px; background:linear-gradient(135deg,rgba(56,189,248,0.12),rgba(139,92,246,0.12)); display:flex; align-items:center; justify-content:center; color:#38bdf8; flex-shrink:0; }
.labs-category-icon-wrap i { width:20px; height:20px; }
.labs-category-title-group { display:flex; align-items:center; gap:14px; }
.labs-category-view-all { display:flex; align-items:center; gap:6px; font-size:0.82rem; color:#38bdf8; text-decoration:none; transition:all .2s; }
.labs-category-view-all:hover { gap:10px; text-shadow:none; }
.labs-category-view-all i { width:14px; height:14px; }

/* ── Topic Hero Card ───────────────────────── */
.topic-hero-card { position:relative; background:linear-gradient(135deg,rgba(56,189,248,0.06),rgba(139,92,246,0.04)); border:1px solid rgba(56,189,248,0.15); border-radius:20px; padding:32px; margin-bottom:var(--space-2xl); overflow:hidden; }
.topic-hero-glow { position:absolute; width:300px; height:300px; top:-100px; right:-50px; border-radius:50%; background:radial-gradient(circle,rgba(56,189,248,0.08),transparent 70%); pointer-events:none; }
.topic-hero-content { display:flex; align-items:flex-start; gap:24px; position:relative; z-index:1; }
.topic-hero-card .topic-icon-wrap { width:64px; height:64px; border-radius:16px; background:linear-gradient(135deg,rgba(56,189,248,0.15),rgba(139,92,246,0.15)); display:flex; align-items:center; justify-content:center; color:#38bdf8; flex-shrink:0; }
.topic-hero-card .topic-icon-wrap i { width:32px; height:32px; }
.topic-hero-text { flex:1; }
.topic-hero-card .topic-title { font-size:1.8rem; font-weight:800; margin-bottom:6px; letter-spacing:-0.02em; }
.topic-hero-card .topic-desc { color:var(--text-secondary); font-size:0.95rem; line-height:1.6; margin-bottom:14px; }

.topic-meta-chips { display:flex; gap:10px; flex-wrap:wrap; }
.topic-chip { display:inline-flex; align-items:center; gap:5px; padding:5px 14px; border-radius:20px; background:rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.08); font-size:0.78rem; color:var(--text-secondary); font-weight:500; }
.topic-chip i { width:13px; height:13px; }
.topic-chip--success { color:#00e676; border-color:rgba(0,230,118,0.2); background:rgba(0,230,118,0.06); }
.topic-chip--xp { color:#fbbf24; border-color:rgba(251,191,36,0.2); background:rgba(251,191,36,0.06); }

.topic-progress-wrap { display:flex; align-items:center; gap:12px; margin-top:20px; position:relative; z-index:1; }
.topic-progress-bar { flex:1; height:6px; background:rgba(255,255,255,0.08); border-radius:10px; overflow:hidden; }
.topic-progress-fill { height:100%; background:linear-gradient(90deg,#38bdf8,#00e676); border-radius:10px; transition:width 1s ease; }
.topic-progress-text { font-size:0.75rem; color:var(--text-muted); font-weight:600; white-space:nowrap; }

/* ── Empty States ──────────────────────────── */
.labs-empty-state { text-align:center; padding:var(--space-3xl); }
.labs-empty-state--sm { padding:var(--space-xl); }
.labs-empty-state .labs-empty-icon { width:80px; height:80px; margin:0 auto var(--space-lg); border-radius:50%; background:rgba(56,189,248,0.06); border:1px solid rgba(56,189,248,0.15); display:flex; align-items:center; justify-content:center; }
.labs-empty-state .labs-empty-icon i { width:36px; height:36px; color:#38bdf8; opacity:0.5; }
.labs-empty-state i { width:32px; height:32px; color:var(--text-muted); opacity:0.3; display:block; margin:0 auto var(--space-sm); }
.labs-empty-state h3 { margin-bottom:var(--space-sm); }
.labs-empty-state p { color:var(--text-secondary); margin-bottom:var(--space-lg); }

/* ── Filter Bar Quantum ────────────────────── */
.labs-pill.active { background:rgba(56,189,248,0.12); border-color:rgba(56,189,248,0.4); color:#38bdf8; }

/* ── Animations ────────────────────────────── */
@keyframes heroPulse { 0%,100%{transform:scale(1);opacity:1} 50%{transform:scale(1.1);opacity:0.7} }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

/* ── Responsive ────────────────────────────── */
@media(max-width:768px) {
    .labs-grid-cards { grid-template-columns:1fr; }
    .labs-stats-grid { gap:8px; }
    .labs-stat-card { padding:12px 16px; min-width:80px; }
    .topic-hero-content { flex-direction:column; }
    .topic-hero-card { padding:20px; }
    .labs-hero { padding:100px 16px 50px; }
}

/* ── Quantum Simulator ─────────────────────── */
.simulator-container { display:flex; flex-direction:column; height:100%; background:var(--bg-card); border-radius:12px; overflow-y:auto; border:1px solid var(--border-subtle); }
.simulator-header { padding:14px 20px; border-bottom:1px solid var(--border-subtle); background:rgba(255,255,255,0.02); display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px; }
.simulator-header h4 { margin:0; font-size:0.95rem; display:flex; align-items:center; gap:8px; color:var(--text-secondary); }
.provider-selector { display:flex; gap:8px; background:rgba(0,0,0,0.2); padding:4px; border-radius:10px; border:1px solid rgba(255,255,255,0.05); }
.provider-btn { display:flex; align-items:center; gap:6px; background:transparent; border:none; color:var(--text-muted); padding:6px 12px; border-radius:8px; font-size:0.8rem; font-weight:600; cursor:pointer; transition:all 0.2s; }
.provider-btn:hover { color:var(--text-primary); background:rgba(255,255,255,0.05); }
.provider-btn.active { background:rgba(255,255,255,0.1); color:var(--text-primary); box-shadow:0 0 0 1px rgba(255,255,255,0.1); }
.provider-btn img { width:16px; height:16px; }

.simulator-body { flex:1; display:flex; flex-direction:column; background:#0d1117; position:relative; }
.editor-header { display:flex; justify-content:space-between; align-items:center; padding:8px 16px; background:#161b22; border-bottom:1px solid #30363d; }
.editor-header span { font-family:var(--font-mono); font-size:0.75rem; color:#8b949e; }
.run-sim-btn { display:flex; align-items:center; gap:6px; background:linear-gradient(135deg,#10b981,#059669); border:none; padding:6px 14px; border-radius:6px; color:#fff; font-size:0.75rem; font-weight:600; cursor:pointer; transition:all 0.2s; }
.run-sim-btn:hover { transform:scale(1.05); box-shadow:0 0 10px rgba(16,185,129,0.3); }
.run-sim-btn i { width:12px; height:12px; }

.quantum-editor { display:none; }
.CodeMirror { flex:1 !important; width:100%; height:100% !important; min-height:250px !important; text-align:left !important; background:#0d1117 !important; border:none; color:#e6edf3; font-family:var(--font-mono) !important; font-size:0.9rem; line-height:1.6; }
.CodeMirror-scroll { padding:8px 0; overflow-x:auto !important; overflow-y:auto !important; }
.CodeMirror-gutters { background:#161b22 !important; border-right:1px solid #30363d !important; border-radius:0; }

.simulator-output { border-top:1px solid var(--border-subtle); background:#0a0d14; min-height:120px; max-height:200px; display:flex; flex-direction:column; }
.sim-output-header { padding:8px 16px; border-bottom:1px solid rgba(255,255,255,0.05); font-size:0.75rem; text-transform:uppercase; letter-spacing:0.05em; color:var(--text-muted); display:flex; align-items:center; gap:6px; }
.sim-output-content { padding:16px; font-family:var(--font-mono); font-size:0.8rem; color:#a3b3cc; overflow-y:auto; flex:1; white-space:pre-wrap; }
.sim-output-content .success { color:#10b981; }
.sim-output-content .info { color:#38bdf8; }

/* ── Layout Fixes ──────────────────────────── */
.workspace-container { margin-top: 50px !important; height: calc(100vh - 116px) !important; }