:root{--bg: #f4f6f8;--surface: #ffffff;--text: #1c2530;--muted: #677586;--border: #e2e7ec;--accent: #0f7b5f;--accent-soft: #e3f4ee;--accent-strong: #0a5d48;--danger: #c2413a;--danger-soft: #fdecea;--warning: #9a6200;--warning-soft: #fff4dc;--blue: #2463c7;--blue-soft: #e7effc;--sidebar: #12211c;--sidebar-text: #c9d6d1;--radius: 10px;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg);font-size:14px;line-height:1.5}*{box-sizing:border-box}body{margin:0;background:var(--bg)}a{color:var(--accent)}h1,h2,h3,h4{margin:0;line-height:1.25}h1{font-size:1.6rem}h2{font-size:1.1rem;margin-bottom:12px}h3{font-size:1rem}h4{font-size:.9rem;margin:18px 0 8px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}code{font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:.85em;background:#eef1f4;padding:1px 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48px}.builder{grid-template-columns:1fr}.builder-nav,.builder-preview{position:static}.option-row{flex-direction:column}.row-actions.vertical{flex-direction:row}}