:root{--bg: #f4f6fb;--card: #ffffff;--ink: #1a2233;--muted: #64708a;--line: #e2e7f0;--brand: #2f6bff;--brand-ink: #ffffff;--danger: #c0362c;--ok: #1f7a44;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex;justify-content:center;padding:40px 16px}.card{background:var(--card);width:100%;max-width:460px;border:1px solid var(--line);border-radius:14px;padding:28px 30px;box-shadow:0 6px 24px #1a22330f}h1{font-size:20px;margin:0 0 4px}.muted{color:var(--muted);margin-top:0}label{display:block;font-weight:600;font-size:13px;margin:14px 0 4px}input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:15px;background:#fbfcfe}input:focus{outline:2px solid var(--brand);outline-offset:1px}button{margin-top:20px;width:100%;padding:11px 14px;border:0;border-radius:9px;background:var(--brand);color:var(--brand-ink);font-weight:600;font-size:15px;cursor:pointer}button:disabled{opacity:.55;cursor:default}.steps{padding-left:18px;color:var(--ink)}.steps li{margin-bottom:10px}.secret{margin-top:6px;font-size:13px;color:var(--muted)}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#eef2fb;padding:2px 6px;border-radius:6px;word-break:break-all}.error{color:var(--danger);font-size:14px}.ok{color:var(--ok)}.codes{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:14px 0}.codes code{text-align:center;padding:8px}a{color:var(--brand)}.hint{background:#eef2ff;border:1px solid #c7d2fe;border-radius:10px;padding:12px 14px;font-size:13.5px;line-height:1.55;color:#3730a3;margin:14px 0}.hint.small{margin-top:10px;font-size:12.5px;background:#fffbeb;border-color:#fde68a;color:#92400e}