:root{color-scheme:light;font-family:Segoe UI,PingFang SC,sans-serif;background:linear-gradient(135deg,#f8fafc,#dbeafe 45%,#e0f2fe);color:#0f172a}*{box-sizing:border-box}body{margin:0;min-height:100vh}.shell{width:min(1240px,calc(100% - 32px));margin:0 auto;padding:32px 0 48px}.hero{display:grid;gap:12px;margin-bottom:24px}.hero h1{margin:0;font-size:clamp(32px,6vw,56px);line-height:.95;letter-spacing:-.04em}.hero p{margin:0;max-width:760px;color:#334155;font-size:16px}.controls{display:grid;gap:16px;margin-bottom:20px}.toolbar{display:flex;flex-wrap:wrap;gap:12px}.options{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.field,.toggle{background:#ffffffc7;border-radius:18px;padding:12px 14px;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.field{display:grid;gap:8px}.field label,.toggle span{font-size:13px;font-weight:600;color:#334155}.field select{width:100%;border:0;background:#f8fafc;border-radius:12px;padding:10px 12px;font:inherit}.toggle{display:flex;align-items:center;justify-content:space-between;gap:12px}.toggle input{width:18px;height:18px}button{border:0;border-radius:999px;padding:12px 18px;font:inherit;font-weight:600;cursor:pointer}.primary{background:#0f172a;color:#f8fafc}.secondary{background:#ffffffc7;color:#0f172a;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.example-card,.preview-panel{border-radius:28px;background:#ffffffbd;box-shadow:0 24px 60px #0f172a1f;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.example-card{padding:20px 22px;margin-bottom:18px}.example-card h2{margin:0 0 8px;font-size:22px}.example-card p{margin:0;color:#475569;line-height:1.6}.preview-panel{padding:16px}#preview{min-height:1120px}iframe{border-radius:20px}@media(max-width:768px){.shell{width:min(100%,calc(100% - 20px));padding-top:24px}.preview-panel,.example-card{border-radius:20px}.preview-panel{padding:10px}}