:root{--bg: #f4f5f7;--surface: #ffffff;--border: #e4e7eb;--text: #1f2329;--muted: #6b7280;--primary: #4f46e5;--primary-hover: #4338ca;--danger: #b00020;--radius: 12px;--shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .04)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}h1{font-size:1.55rem;font-weight:650;letter-spacing:-.01em;margin:0 0 .4rem}h2{font-size:1.05rem;font-weight:600;margin:1.9rem 0 .6rem;padding-top:1.1rem;border-top:1px solid var(--border);color:var(--text)}p{color:var(--muted);margin:.4rem 0 .9rem}a{color:var(--primary);text-decoration:none;font-weight:500}a:hover{text-decoration:underline}button{font:inherit;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:.45rem .85rem;cursor:pointer;transition:border-color .15s ease,color .15s ease,background .15s ease}button:hover:not(:disabled){border-color:var(--primary);color:var(--primary)}button:disabled{opacity:.55;cursor:default}button[type=submit]{background:var(--primary);border-color:var(--primary);color:#fff}button[type=submit]:hover:not(:disabled){background:var(--primary-hover);border-color:var(--primary-hover);color:#fff}input{font:inherit;border:1px solid var(--border);border-radius:8px;padding:.5rem .6rem;background:#fff;color:var(--text)}input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e526}label{font-weight:550;font-size:.92rem}ul{padding-left:0;list-style:none}