:root{--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-display: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--brand-blue: #2563eb;--brand-blue-hover: #1d4ed8;--brand-blue-active: #1e40af;--brand-blue-subtle: #eff6ff;--brand-blue-border: #bfdbfe;--brand-cyan: #0284c7;--brand-purple: #4f46e5;--brand-emerald: #059669;--brand-amber: #d97706;--brand-rose: #dc2626;--bg-canvas: #f8fafc;--bg-card: #ffffff;--bg-surface-elevated: #ffffff;--bg-subtle: #f1f5f9;--text-primary: #0f172a;--text-secondary: #334155;--text-muted: #64748b;--text-faint: #94a3b8;--border-color: #e2e8f0;--border-strong: #cbd5e1;--code-bg: #0f172a;--code-header-bg: #1e293b;--code-border: #334155;--code-text: #f8fafc;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .04);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .06), 0 2px 4px -1px rgba(0, 0, 0, .03);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .07), 0 4px 6px -2px rgba(0, 0, 0, .03);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .08), 0 10px 10px -5px rgba(0, 0, 0, .03)}[data-theme=dark]{--bg-canvas: #07090E;--bg-card: #0F1420;--bg-surface-elevated: #151C2C;--bg-subtle: #192235;--text-primary: #F8FAFC;--text-secondary: #CBD5E1;--text-muted: #94A3B8;--text-faint: #64748B;--border-color: #1E293B;--border-strong: #334155;--code-bg: #05070B;--code-header-bg: #0B0F18;--code-border: #1E293B;--code-text: #F1F5F9;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .5)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-canvas);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .25s ease,color .25s ease}.reading-progress-track{position:fixed;top:0;left:0;right:0;height:3px;background:transparent;z-index:1000;pointer-events:none}.reading-progress-bar{height:100%;background:linear-gradient(90deg,#0052cc,#00b4d8,#7c3aed);transition:width .1s ease-out;box-shadow:0 0 10px #00b4d899}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-sans);font-size:.82rem;font-weight:600;padding:8px 16px;border-radius:8px;border:1px solid transparent;cursor:pointer;transition:all .15s ease-in-out;text-decoration:none;white-space:nowrap}.btn-primary{background:var(--brand-blue);color:#fff;box-shadow:0 1px 3px #0052cc4d}.btn-primary:hover{background:var(--brand-blue-hover);box-shadow:0 4px 10px #0052cc66;transform:translateY(-1px)}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--bg-subtle);border-color:var(--border-strong);color:var(--text-primary)}.btn-ghost{background:transparent;color:var(--text-muted)}.btn-ghost:hover{background:var(--bg-subtle);color:var(--text-primary)}.btn-sm{padding:5px 10px;font-size:.74rem;border-radius:6px}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;box-shadow:var(--shadow-sm);transition:all .2s cubic-bezier(.16,1,.3,1)}.card-hover:hover{transform:translateY(-3px);border-color:#0052cc4d;box-shadow:var(--shadow-md)}.form-input,.form-select,.form-textarea{width:100%;padding:9px 12px;border-radius:8px;border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-primary);font-family:var(--font-sans);font-size:.84rem;transition:all .15s ease;outline:none}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--brand-blue);box-shadow:0 0 0 3px #0052cc1f}.form-label{display:block;font-size:.76rem;font-weight:700;color:var(--text-secondary);margin-bottom:5px;text-transform:uppercase;letter-spacing:.03em}.table-container{overflow-x:auto;border:1px solid var(--border-color);border-radius:10px;background:var(--bg-card)}.data-table{width:100%;border-collapse:collapse;font-size:.8rem;text-align:left}.data-table th{background:var(--bg-subtle);color:var(--text-muted);font-weight:700;padding:12px 16px;border-bottom:1px solid var(--border-color);text-transform:uppercase;font-size:.7rem;letter-spacing:.04em}.data-table td{padding:12px 16px;border-bottom:1px solid var(--border-color);color:var(--text-secondary);vertical-align:middle}.data-table tbody tr:hover{background:var(--bg-subtle)}.prose{color:var(--text-secondary);font-size:1.05rem;line-height:1.8;max-width:740px;margin:0 auto}.prose h1,.prose h2,.prose h3,.prose h4{color:var(--text-primary);font-family:var(--font-display);font-weight:800;letter-spacing:-.02em;margin-top:2rem;margin-bottom:1rem;scroll-margin-top:90px}.prose h1{font-size:2rem}.prose h2{font-size:1.5rem;border-bottom:1px solid var(--border-color);padding-bottom:.4rem}.prose h3{font-size:1.25rem}.prose p{margin-bottom:1.4rem}.prose strong{color:var(--text-primary);font-weight:700}.prose ul,.prose ol{margin-bottom:1.4rem;padding-left:1.5rem}.prose li{margin-bottom:.5rem}.prose a{color:var(--brand-blue);text-decoration:underline;text-underline-offset:3px;font-weight:500}.prose hr{border:0;border-top:1px solid var(--border-color);margin:2.5rem 0}.code-container{margin:1.5rem 0;border-radius:10px;background:var(--code-bg);border:1px solid var(--code-border);overflow:hidden;box-shadow:var(--shadow-md)}.code-header{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;background:var(--code-header-bg);border-bottom:1px solid var(--code-border)}.code-language-badge{font-family:var(--font-mono);font-size:.7rem;font-weight:700;color:var(--brand-cyan);text-transform:uppercase;display:flex;align-items:center;gap:6px}.code-copy-btn{background:#ffffff14;color:#e2e8f0;border:1px solid rgba(255,255,255,.12);padding:3px 8px;border-radius:5px;font-size:.68rem;font-family:var(--font-mono);cursor:pointer;display:flex;align-items:center;gap:5px;transition:all .15s ease}.code-copy-btn:hover{background:#ffffff29;color:#fff}.code-content{padding:16px;overflow-x:auto;font-family:var(--font-mono);font-size:.84rem;line-height:1.6;color:var(--code-text);-moz-tab-size:2;tab-size:2}.callout{padding:16px 20px;border-radius:10px;margin:1.5rem 0;display:flex;gap:14px;font-size:.88rem;line-height:1.6}.callout-info{background:#0052cc0f;border:1px solid rgba(0,82,204,.2);color:var(--text-primary)}.callout-tip{background:#0596690f;border:1px solid rgba(5,150,105,.2);color:var(--text-primary)}.callout-warning{background:#d977060f;border:1px solid rgba(217,119,6,.25);color:var(--text-primary)}.callout-caution{background:#dc26260f;border:1px solid rgba(220,38,38,.25);color:var(--text-primary)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172aa6;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1100;display:flex;align-items:flex-start;justify-content:center;padding-top:10vh;animation:fadeIn .15s ease-out}.modal-content{background:var(--bg-card);border:1px solid var(--border-color);border-radius:14px;box-shadow:var(--shadow-xl);max-width:90vw;animation:scaleIn .2s cubic-bezier(.16,1,.3,1);overflow:hidden}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleIn{0%{opacity:0;transform:scale(.97)}to{opacity:1;transform:scale(1)}}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}