:root{color-scheme:light;font-family:system-ui,-apple-system,PingFang TC,Microsoft JhengHei,sans-serif;line-height:1.6}*{box-sizing:border-box}body{margin:0;background:#f8fafc;color:#0f172a}.app-shell{max-width:720px;margin:0 auto;padding:2rem 1.25rem}h1{font-size:1.6rem;margin:0 0 1rem}h2{font-size:1.2rem;margin:1.5rem 0 .5rem}.card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:1.25rem;margin:1rem 0}.warn{border-color:#f59e0b;background:#fffbeb}.crisis{border-color:#dc2626;background:#fef2f2}.ok{border-color:#16a34a;background:#f0fdf4}button{font:inherit;cursor:pointer;background:#0f172a;color:#fff;border:none;border-radius:8px;padding:.6rem 1.2rem}button:disabled{background:#94a3b8;cursor:not-allowed}input[type=number],select{font:inherit;padding:.4rem .6rem;border:1px solid #cbd5e1;border-radius:8px;width:100%}label{display:block;margin:.75rem 0 .25rem;font-weight:600}.small{color:#475569;font-size:.9rem}.row{display:flex;gap:.75rem;align-items:center}.muted{color:#64748b}