:root{--bg: #0a0c18;--surface: #141627;--surface-alt: #1b1e33;--surface-hover: #22253d;--border: #2a2d44;--text: #ffffff;--text-muted: #9ca3af;--text-dim: #6b7280;--accent: #8b5cf6;--accent-2: #22c55e;--warning: #eab308;--danger: #ef4444;--gradient: linear-gradient(90deg, #8b5cf6 0%, #22c55e 100%);--shadow: 0 10px 40px -10px rgba(139, 92, 246, .25)}[data-theme=light]{--bg: #f5f5f7;--surface: #ffffff;--surface-alt: #f0f0f4;--surface-hover: #ebeaef;--border: #e4e4e8;--text: #0a0a0f;--text-muted: #4b5563;--text-dim: #6b7280;--shadow: 0 10px 40px -10px rgba(139, 92, 246, .15)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}::selection{background:var(--accent);color:#fff}.app{display:grid;grid-template-columns:280px 1fr;min-height:100vh}@media (max-width: 900px){.app{grid-template-columns:1fr}.sidebar{display:none}.sidebar.open{display:flex;position:fixed;inset:0;z-index:50}}.sidebar{background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto}.sidebar-header{padding:20px 24px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}.logo-mark{width:36px;height:36px;background:var(--gradient);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:16px}.logo-text{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.logo-sub{font-size:11px;color:var(--text-muted);margin-top:2px}.nav{padding:16px 12px;flex:1}.nav-label{font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--text-dim);padding:16px 12px 8px}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:var(--text-muted);text-decoration:none;font-size:14px;cursor:pointer;transition:all .15s ease;margin-bottom:2px;border:none;background:none;width:100%;text-align:left;font-family:inherit}.nav-item:hover{background:var(--surface-hover);color:var(--text)}.nav-item.active{background:var(--surface-alt);color:var(--text);font-weight:500}.nav-item.active .nav-num{background:var(--gradient);color:#fff}.nav-num{min-width:22px;height:22px;display:flex;align-items:center;justify-content:center;background:var(--surface-alt);border-radius:6px;font-size:10px;font-weight:700;font-family:JetBrains Mono,monospace}.nav-item.done .nav-num{background:var(--accent-2);color:#fff}.nav-item.done .nav-num:before{content:"✓";font-family:inherit;font-weight:700}.nav-item.done .nav-num .num{display:none}.sidebar-footer{padding:16px 20px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:10px}.theme-toggle{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;border:1px solid var(--border);background:var(--surface);cursor:pointer;color:var(--text);transition:all .15s}.theme-toggle:hover{background:var(--surface-hover)}.main{padding:40px 48px 80px;max-width:1100px}@media (max-width: 900px){.main{padding:24px 20px 60px}}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:36px;gap:16px}.mobile-menu{display:none;width:40px;height:40px;border-radius:8px;border:1px solid var(--border);background:var(--surface);cursor:pointer;color:var(--text)}@media (max-width: 900px){.mobile-menu{display:flex;align-items:center;justify-content:center}}.progress-chip{display:inline-flex;align-items:center;gap:10px;padding:8px 14px;border-radius:999px;border:1px solid var(--border);background:var(--surface);font-size:13px;color:var(--text-muted)}.progress-chip .bar{width:80px;height:4px;background:var(--surface-alt);border-radius:999px;overflow:hidden}.progress-chip .bar-fill{height:100%;background:var(--gradient);transition:width .3s ease}h1{font-size:40px;font-weight:800;letter-spacing:-.02em;line-height:1.1;margin-bottom:16px}h2{font-size:28px;font-weight:700;letter-spacing:-.01em;line-height:1.2;margin:40px 0 16px}h3{font-size:20px;font-weight:600;margin:24px 0 12px}h4{font-size:16px;font-weight:600;margin:16px 0 8px}p{color:var(--text-muted);margin-bottom:14px}.main p strong{color:var(--text);font-weight:600}a{color:var(--accent);text-decoration:none;cursor:pointer}a:hover{text-decoration:underline}code{font-family:JetBrains Mono,monospace;font-size:.9em;background:var(--surface-alt);padding:2px 6px;border-radius:4px;color:var(--text)}.eyebrow{font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px;display:inline-block}.lede{font-size:18px;color:var(--text-muted);margin-bottom:32px;max-width:720px}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px;margin-bottom:20px}.card-gradient-bar{height:3px;background:var(--gradient);border-radius:3px;margin-bottom:20px}.gradient-bar{height:2px;background:var(--gradient);border-radius:2px;margin:32px 0}.bullets{list-style:none;padding:0}.bullets li{position:relative;padding-left:22px;margin-bottom:10px;color:var(--text-muted)}.bullets li:before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;background:var(--gradient)}.bullets li strong{color:var(--text)}.md-body ul{list-style:none;padding:0;margin-bottom:14px}.md-body ul li{position:relative;padding-left:22px;margin-bottom:10px;color:var(--text-muted)}.md-body ul li:before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;background:var(--gradient)}.md-body ul li strong{color:var(--text)}.md-body ol{padding-left:24px;margin-bottom:14px;color:var(--text-muted)}.md-body ol li{margin-bottom:6px}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0}@media (max-width: 720px){.stat-grid{grid-template-columns:1fr}}.stat-card{background:var(--surface-alt);border:1px solid var(--border);border-radius:12px;padding:20px;text-align:center}.stat-value{font-family:JetBrains Mono,monospace;font-size:28px;font-weight:700;color:var(--text)}.stat-label{font-size:12px;color:var(--text-muted);margin-top:4px}.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:10px;font-weight:600;font-size:14px;cursor:pointer;border:1px solid transparent;transition:all .15s ease;font-family:inherit}.btn-primary{background:var(--gradient);color:#fff;box-shadow:var(--shadow)}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 40px -8px #8b5cf666}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--surface-hover)}.btn-ghost{background:transparent;color:var(--text-muted)}.btn-ghost:hover{color:var(--text)}.btn-row{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}.check{margin-top:32px;padding-top:32px;border-top:1px solid var(--border)}.check-title{font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}.question{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px 22px;margin-bottom:14px}.question-stem{font-weight:600;color:var(--text);margin-bottom:14px}.options{display:flex;flex-direction:column;gap:8px}.option{display:flex;align-items:flex-start;gap:12px;padding:12px 14px;border:1px solid var(--border);border-radius:10px;cursor:pointer;transition:all .15s ease;background:var(--surface-alt);color:var(--text);font-size:14px;text-align:left;font-family:inherit;width:100%}.option:hover:not(:disabled){border-color:var(--accent);background:var(--surface-hover)}.option:disabled{cursor:default}.option-letter{min-width:22px;height:22px;border-radius:6px;background:var(--bg);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;font-family:JetBrains Mono,monospace;flex-shrink:0;margin-top:1px}.option.correct{border-color:var(--accent-2);background:#22c55e14}.option.correct .option-letter{background:var(--accent-2);color:#fff;border-color:var(--accent-2)}.option.incorrect{border-color:var(--danger);background:#ef444414}.option.incorrect .option-letter{background:var(--danger);color:#fff;border-color:var(--danger)}.option.selected:not(.correct):not(.incorrect){border-color:var(--accent);background:#8b5cf614}.explain{margin-top:14px;padding:14px 16px;background:var(--surface-alt);border-radius:10px;font-size:14px;color:var(--text-muted);border-left:3px solid var(--accent)}.explain strong{color:var(--text)}.assessment-header{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:28px;margin-bottom:24px}.assessment-meta{display:flex;gap:18px;margin-top:16px;font-size:13px;color:var(--text-muted);flex-wrap:wrap}.assessment-meta span strong{color:var(--text)}.assessment-progress{display:flex;align-items:center;gap:12px;margin-bottom:24px;padding:12px 16px;background:var(--surface);border:1px solid var(--border);border-radius:10px;position:sticky;top:16px;z-index:10;backdrop-filter:blur(8px)}.assessment-progress .bar{flex:1;height:6px;background:var(--surface-alt);border-radius:999px;overflow:hidden}.assessment-progress .bar-fill{height:100%;background:var(--gradient);transition:width .3s}.assessment-progress-count{font-family:JetBrains Mono,monospace;font-size:13px;font-weight:600;color:var(--text);min-width:60px;text-align:right}.score-hero{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:40px;text-align:center;margin-bottom:24px;position:relative;overflow:hidden}.score-hero:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient)}.score-display{font-family:JetBrains Mono,monospace;font-size:72px;font-weight:800;letter-spacing:-.02em;background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}.score-display .of{font-size:40px;color:var(--text-muted);-webkit-background-clip:initial;background-clip:initial;-webkit-text-fill-color:var(--text-muted)}.score-sub{color:var(--text-muted);font-size:14px;margin-top:8px}.score-grade{display:inline-block;margin-top:18px;padding:6px 14px;border-radius:999px;background:var(--surface-alt);font-size:13px;font-weight:600}.cat-bars{margin-top:8px}.cat-bar-row{margin-bottom:18px}.cat-bar-label{display:flex;justify-content:space-between;font-size:14px;margin-bottom:6px}.cat-bar-label .score{color:var(--text-muted);font-family:JetBrains Mono,monospace}.cat-bar-track{height:8px;background:var(--surface-alt);border-radius:999px;overflow:hidden}.cat-bar-fill{height:100%;background:var(--gradient);border-radius:999px;transition:width .6s}.gap-list{padding:0;list-style:none}.gap-item{display:flex;align-items:flex-start;gap:12px;padding:14px 0;border-bottom:1px solid var(--border)}.gap-item:last-child{border-bottom:none}.gap-priority{min-width:24px;height:24px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;font-family:JetBrains Mono,monospace;flex-shrink:0;color:#fff}.gap-priority.high{background:var(--danger)}.gap-priority.mid{background:var(--warning);color:#0a0a0f}.gap-priority.low{background:var(--accent-2)}.gap-body{flex:1;font-size:14px;color:var(--text)}.gap-body small{color:var(--text-muted);display:block;margin-top:2px}.tag{display:inline-block;padding:3px 9px;border-radius:999px;font-size:11px;font-weight:600;background:var(--surface-alt);color:var(--text-muted);letter-spacing:.04em;text-transform:uppercase}.tag-accent{background:#8b5cf61f;color:var(--accent)}.tag-green{background:#22c55e1f;color:var(--accent-2)}.hero{padding:40px 0 20px;position:relative}.hero h1{font-size:52px;max-width:760px}@media (max-width: 720px){.hero h1{font-size:36px}}.hero .eyebrow{font-size:13px}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:28px}.feature{padding:22px;background:var(--surface);border:1px solid var(--border);border-radius:12px;transition:all .2s ease}.feature:hover{transform:translateY(-2px);border-color:var(--accent)}.feature.clickable{cursor:pointer}.feature-icon{width:36px;height:36px;border-radius:8px;background:var(--gradient);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:14px;font-weight:700}.feature-title{font-weight:600;margin-bottom:4px;color:var(--text)}.feature-desc{font-size:13px;color:var(--text-muted)}.callout{padding:18px 22px;background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:10px;margin:20px 0}.callout-title{font-weight:600;margin-bottom:4px;color:var(--text);display:flex;align-items:center;gap:8px}.callout-body{color:var(--text-muted);font-size:14px}.callout.warn{border-left-color:var(--warning)}.callout.green{border-left-color:var(--accent-2)}.callout.danger{border-left-color:var(--danger)}.action-list{counter-reset:actionstep;list-style:none;padding:0;margin-top:12px}.action-list li{counter-increment:actionstep;padding:14px 16px 14px 52px;background:var(--surface);border:1px solid var(--border);border-radius:10px;margin-bottom:10px;position:relative;color:var(--text);font-size:14px;list-style:none}.action-list li:before{content:counter(actionstep);position:absolute;left:14px;top:50%;transform:translateY(-50%);width:26px;height:26px;background:var(--gradient);color:#fff;border-radius:7px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;font-family:JetBrains Mono,monospace}.muted{color:var(--text-muted)}.center{text-align:center}.mt{margin-top:20px}.mt-lg{margin-top:40px}.flex-between{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:10px}::-webkit-scrollbar-thumb:hover{background:var(--text-dim)}button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}