:root{--bg:#f4f6f8;--card:#fff;--ink:#1f2937;--muted:#5f5e5a;--line:#e5e7eb;--primary:#0f6b8a;--danger:#c62828;--ok:#0f7b5f}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
.wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px}
.card{width:100%;max-width:440px;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 30px rgba(0,0,0,.06);padding:22px 24px}
.head{display:flex;flex-direction:column;gap:2px;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:14px}
.brand{font-weight:700;font-size:17px}.brand.practice{font-weight:800;font-size:20px;letter-spacing:.2px}.versions{font-size:12px;color:var(--muted)}
h1{font-size:20px;margin:0 0 10px}label{display:block;margin:10px 0 6px;font-weight:600;font-size:13px}
input{display:block;width:100%;margin-top:4px;padding:10px 12px;font:inherit;border:1px solid #cfd4da;border-radius:8px}input:focus{outline:2px solid var(--primary);border-color:transparent}
button.primary{margin-top:14px;width:100%;padding:11px;font:inherit;font-weight:700;color:#fff;background:var(--primary);border:0;border-radius:8px;cursor:pointer}button.primary[disabled]{opacity:.6;cursor:wait}
button.link{margin-top:10px;background:none;border:0;color:var(--primary);cursor:pointer;font:inherit;padding:0}
.muted{color:var(--muted);font-size:13px}.small{font-size:12px}.error{margin-top:12px;padding:10px 12px;border-radius:8px;background:#fef2f2;border:1px solid #fecaca;color:#991b1b;font-size:14px}
.notices{margin:0 0 14px;padding:10px 12px;border-radius:8px;background:#fff8e6;border:1px solid #f0c36d;font-size:13px}.notices h2{font-size:13px;margin:0 0 6px}.notices .n{margin:6px 0}.notices .n strong{display:block}
.secret{font-family:ui-monospace,Menlo,monospace;font-size:14px;word-break:break-all;padding:8px 10px;background:#f3f4f6;border-radius:8px;margin:8px 0}
.foot{margin-top:16px;border-top:1px solid var(--line);padding-top:10px}