:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #1a1f2e;
  --muted: #6b7280;
  --line: #e5e7eb;
  --navy: #0b3b6f;
  --accent: #8b0000;
  --err: #b91c1c;
  --ok: #0a7d3a;
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
a { color: var(--navy); }

.shell { max-width: 720px; margin: 0 auto; min-height: 100vh; display: flex; flex-direction: column; }
.topbar { display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; background: var(--navy); color: #fff; }
.topbar .brand { font-weight: 600; }
.topbar form { margin: 0; }
.topbar .link { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.4);
  padding: 6px 12px; border-radius: 8px; cursor: pointer; }
.page { padding: 24px; flex: 1; }
.bottom { padding: 12px 24px; color: var(--muted); font-size: 12px; text-align: center; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: 0 1px 3px rgba(15,23,42,.06); }
.card.narrow { max-width: 420px; margin: 32px auto; }
.card h1 { margin: 0 0 14px; font-size: 20px; }
.card h2 { margin: 18px 0 8px; font-size: 16px; }
.card hr { border: none; border-top: 1px solid var(--line); margin: 22px 0; }
.muted { color: var(--muted); font-size: 13px; }

label { display: block; margin: 14px 0 6px; font-size: 13px; color: var(--muted); }
input[type=text] { width: 100%; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 10px; font-size: 14px; }
button { margin-top: 14px; padding: 10px 18px; background: var(--navy); color: #fff;
  border: none; border-radius: 10px; font-size: 14px; cursor: pointer; font-weight: 500; }
button:disabled { opacity: .6; cursor: not-allowed; }
button:hover:not(:disabled) { background: #143a78; }

.msg { margin-top: 14px; min-height: 1.4em; font-size: 13px; }
.msg.err { color: var(--err); }

table.passkeys { width: 100%; border-collapse: collapse; margin-top: 8px; }
table.passkeys th, table.passkeys td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; font-size: 13px; }
table.passkeys th { color: var(--muted); font-weight: 500; }