:root{--bg: #0b0d12;--surface: #141821;--surface-2: #1a1f2b;--border: #262d3a;--text: #f5f7fa;--text-muted: #929bad;--accent: #6c8cff;--accent-hover: #85a0ff;--accent-soft: rgba(108, 140, 255, .12);--danger: #ff6c6c;--success: #4ade80;--radius: 14px;--radius-sm: 10px;--shadow: 0 8px 30px rgba(0, 0, 0, .35);--font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;--mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;--accent-gradient: linear-gradient(135deg, #6c8cff, #9a6cff)}[data-theme=light]{--bg: #f6f7fb;--surface: #ffffff;--surface-2: #eef1f7;--border: #dfe4ee;--text: #171b26;--text-muted: #5c6579;--accent: #4a6ef5;--accent-hover: #3a5ce0;--accent-soft: rgba(74, 110, 245, .1);--shadow: 0 8px 30px rgba(23, 27, 38, .08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;transition:background .25s ease,color .25s 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0}.demo-window{position:relative;background:color-mix(in srgb,var(--surface) 88%,transparent);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);overflow:hidden;backdrop-filter:blur(8px);animation:float 6s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.demo-bar{display:flex;align-items:center;gap:6px;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--surface-2)}.demo-bar>span:not(.demo-url){width:10px;height:10px;border-radius:50%;background:var(--border)}.demo-bar>span:first-child{background:#ff6c6c}.demo-bar>span:nth-child(2){background:#ffd166}.demo-bar>span:nth-child(3){background:#4ade80}.demo-url{display:inline-flex;align-items:center;gap:6px;margin-left:10px;padding:3px 12px;border-radius:999px;background:var(--bg);border:1px solid var(--border);color:var(--text-muted);font-size:.74rem;font-family:var(--mono)}.demo-url 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summary:after{content:"+";color:var(--accent);font-size:1.3rem;font-weight:400}.faq details[open] summary:after{content:"−"}.faq details p{margin:0;padding:0 20px 16px;color:var(--text-muted);font-size:.92rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:var(--radius-sm);border:1px solid transparent;background:var(--accent);color:#fff;font-size:.94rem;font-weight:600;font-family:inherit;cursor:pointer;transition:background .15s ease,border-color .15s ease,opacity .15s 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6px}.error-hero{text-align:center;padding:90px 0}.error-hero .code{font-size:clamp(4rem,12vw,7rem);font-weight:800;letter-spacing:-.04em;color:var(--accent);line-height:1}.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}@media(max-width:860px){.main-nav{display:none}.nav-toggle{display:inline-flex}.footer-grid{grid-template-columns:1fr 1fr}.hero{padding:48px 0 36px}}@media(max-width:560px){.footer-grid{grid-template-columns:1fr;gap:24px}.tool-panel{padding:16px}.control-row{align-items:stretch;flex-direction:column}.control-row .field{width:100%}.section-header{flex-wrap:wrap}}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}::selection{background:var(--accent);color:#fff}*{scrollbar-width:thin;scrollbar-color:var(--border) 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