:root{--sidebar-width: 260px;--header-height: 64px;--navy: #0a2351;--navy-dark: #061633;--blue: #1b5eb5;--blue-light: #3b82f6;--cyan: #2ea5c9;--purple: #6b3fa0;--coral: #d97757;--bg-white: #ffffff;--bg-light: #f8fafc;--bg-alt: #f1f5f9;--bg-dark: #071224;--bg-main: #f8fafc;--bg-surface: #ffffff;--bg-card: #ffffff;--bg-card-hover: #f8fafc;--bg-elevated: #f1f5f9;--bg-muted: #f8fafc;--text-primary: #0f172a;--text-secondary: #475569;--text-tertiary: #94a3b8;--text-main: #0f172a;--text-muted: #475569;--text-subtle: #94a3b8;--text-white: #f8fafc;--text-white-dim: rgba(248, 250, 252, .7);--text-white-muted: rgba(248, 250, 252, .45);--border: #e2e8f0;--border-light: #f1f5f9;--border-dim: #e2e8f0;--border-subtle: #e2e8f0;--border-hover: #cbd5e1;--border-focus: #1b5eb5;--primary: #1b5eb5;--primary-hover: #154c93;--primary-light: #eff6ff;--primary-border: #bfdbfe;--cyan-primary: #2ea5c9;--teal-accent: #2ea5c9;--amber-warning: #d97706;--amber-bg: #fffbeb;--amber-border: #fde68a;--emerald-success: #059669;--emerald-bg: #ecfdf5;--emerald-border: #a7f3d0;--coral-error: #dc2626;--coral-bg: #fef2f2;--coral-border: #fecaca;--violet-quest: #6b3fa0;--violet-bg: #f5f3ff;--violet-border: #ddd6fe;--blue-info: #1b5eb5;--blue-bg: #eff6ff;--blue-border: #bfdbfe;--font-h: "Sora", "Inter", -apple-system, sans-serif;--font-b: "DM Sans", "Inter", -apple-system, sans-serif;--font-m: "Space Mono", "JetBrains Mono", ui-monospace, monospace;--font-sans: "DM Sans", "Inter", -apple-system, sans-serif;--font-mono: "Space Mono", "JetBrains Mono", ui-monospace, monospace;--font-display: "Sora", "Inter", sans-serif;--r-sm: 8px;--r-md: 12px;--r-lg: 16px;--r-xl: 24px;--r-full: 9999px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .04);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .03);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .08), 0 8px 10px -6px rgba(0, 0, 0, .03);--ease: cubic-bezier(.16, 1, .3, 1)}[data-theme=dark]{--navy: #0F172A;--navy-dark: #020617;--blue: #3B82F6;--blue-light: #60A5FA;--cyan: #38BDF8;--purple: #A78BFA;--coral: #FB7185;--bg-white: #131A26;--bg-light: #162030;--bg-alt: #1A2536;--bg-dark: #070B12;--bg-main: #0B0F17;--bg-surface: #131A26;--bg-card: #131A26;--bg-card-hover: #1A2434;--bg-elevated: #1E293B;--bg-muted: #162030;--bg-header: rgba(19, 26, 38, .94);--text-primary: #F1F5F9;--text-secondary: #94A3B8;--text-tertiary: #64748B;--text-main: #F1F5F9;--text-muted: #94A3B8;--text-subtle: #64748B;--text-white: #F8FAFC;--text-white-dim: rgba(248, 250, 252, .7);--text-white-muted: rgba(248, 250, 252, .45);--border: #1E293B;--border-light: #1E293B;--border-dim: #1E293B;--border-subtle: #1E293B;--border-hover: #334155;--border-focus: #3B82F6;--primary: #3B82F6;--primary-hover: #2563EB;--primary-light: rgba(59, 130, 246, .15);--primary-border: rgba(59, 130, 246, .3);--amber-warning: #F59E0B;--amber-bg: rgba(245, 158, 11, .12);--amber-border: rgba(245, 158, 11, .3);--emerald-success: #10B981;--emerald-bg: rgba(16, 185, 129, .12);--emerald-border: rgba(16, 185, 129, .3);--coral-error: #EF4444;--coral-bg: rgba(239, 68, 68, .12);--coral-border: rgba(239, 68, 68, .3);--violet-quest: #8B5CF6;--violet-bg: rgba(139, 92, 246, .12);--violet-border: rgba(139, 92, 246, .3);--blue-info: #3B82F6;--blue-bg: rgba(59, 130, 246, .12);--blue-border: rgba(59, 130, 246, .3)}[data-theme=dark] .top-header{background:var(--bg-header)}[data-theme=dark] .progress-bar-bg{background:#1e293b}[data-theme=dark] .badge-neutral,[data-theme=dark] .option-badge{background:#1e293b;border-color:#334155;color:#94a3b8}[data-theme=dark] select option{background:#131a26;color:#f1f5f9}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{background-color:var(--bg-main);color:var(--text-main);font-family:var(--font-sans);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.app-container{display:flex;min-height:100vh;position:relative;background-color:var(--bg-main);background-image:radial-gradient(rgba(46,165,201,.05) 1px,transparent 1px);background-size:32px 32px}.main-content{flex:1;margin-left:var(--sidebar-width);width:calc(100% - var(--sidebar-width));padding-top:var(--header-height);padding-bottom:48px;min-width:0;display:flex;flex-direction:column}.page-wrapper{max-width:1240px;width:100%;margin:0 auto;padding:32px 36px}.section-label{font-family:var(--font-m);letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);margin-bottom:8px;font-size:.72rem;font-weight:700;display:inline-flex;align-items:center;gap:6px}.section-desc{color:var(--text-secondary);max-width:680px;margin-top:6px;font-size:.95rem;line-height:1.6}.gradient-text{background:linear-gradient(135deg,var(--blue),var(--cyan));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.poly-badge-dot{background:var(--cyan);border-radius:50%;flex-shrink:0;width:8px;height:8px;animation:2s ease-in-out infinite dotPing}@keyframes dotPing{0%,to{opacity:1;transform:scale(1);box-shadow:0 0 #2ea5c999}50%{opacity:.7;transform:scale(1.15);box-shadow:0 0 0 6px #2ea5c900}}.sidebar{width:var(--sidebar-width);background:var(--bg-surface);border-right:1px solid 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36px}.header-left{display:flex;align-items:center;gap:16px}.header-right{display:flex;align-items:center;gap:12px}.header-stat-chip{display:flex;align-items:center;gap:6px;background:var(--bg-surface);border:1px solid var(--border-subtle);padding:5px 12px;border-radius:var(--radius-full);font-size:.82rem;font-weight:500;color:var(--text-muted)}.header-stat-chip.streak{border-color:var(--amber-border);background:var(--amber-bg);color:var(--amber-warning)}.header-stat-chip.xp{border-color:var(--primary-border);background:var(--primary-light);color:var(--primary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-sans);font-weight:500;font-size:.88rem;padding:8px 16px;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;transition:all .15s ease;text-decoration:none}.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-light));color:#fff;box-shadow:0 4px 14px 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ease;font-size:.95rem;color:var(--text-main)}.option-card:hover{background:var(--bg-card-hover);border-color:var(--border-hover)}.option-card.selected{border-color:var(--primary);background:var(--primary-light)}.option-card.correct{border-color:var(--emerald-success);background:var(--emerald-bg)}.option-card.incorrect{border-color:var(--coral-error);background:var(--coral-bg)}.option-badge{width:28px;height:28px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:.82rem;background:#f1f5f9;border:1px solid #cbd5e1;color:var(--text-muted);flex-shrink:0}.option-card.selected .option-badge{background:var(--primary);color:#fff;border-color:var(--primary)}.data-table{width:100%;border-collapse:collapse;text-align:left}.data-table th{padding:12px 16px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);border-bottom:1px solid var(--border-subtle);background:var(--bg-muted)}.data-table td{padding:14px 16px;border-bottom:1px solid var(--border-subtle);font-size:.88rem;color:var(--text-main)}.data-table tr:hover td{background:var(--bg-card-hover)}.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:var(--radius-full);font-family:var(--font-m);font-size:.68rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.card-badge{border-radius:var(--radius-full);font-family:var(--font-m);letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px;padding:4px 12px;font-size:.65rem;font-weight:700;display:inline-flex;align-items:center;gap:6px}.badge-blue,.badge-primary{color:var(--blue);background:#1b5eb514;border:1px solid rgba(27,94,181,.2)}.badge-cyan{color:var(--cyan);background:#2ea5c914;border:1px solid rgba(46,165,201,.25)}.badge-purple,.badge-violet{color:var(--purple);background:#6b3fa014;border:1px solid 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print{body{background:#fff!important;color:#000!important}.sidebar,.top-header,.btn,.no-print{display:none!important}.main-content{margin-left:0!important;padding-top:0!important}.card{border:1px solid #ccc!important;box-shadow:none!important;background:#fff!important;color:#000!important;page-break-inside:avoid}}@media(max-width:1024px){.sidebar{width:72px}.sidebar .nav-text,.brand-title span,.nav-section-label,.sidebar-footer{display:none}.sidebar-header{justify-content:center;padding:0}.main-content{margin-left:72px}.top-header{left:72px}.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(1,1fr)}}@media(max-width:768px){.top-header{padding:0 16px}.page-wrapper{padding:20px 16px}.grid-2,.grid-4{grid-template-columns:1fr}}