:root { color-scheme: light dark; --fg: #1f2328; --muted: #59636e; --bg: #f6f8fa; --card: #ffffff; --line: #d1d9e0; --accent: #1f6feb; --danger: #cf222e; }
@media (prefers-color-scheme: dark) { :root { --fg: #e6edf3; --muted: #9198a1; --bg: #0d1117; --card: #151b23; --line: #3d444d; --accent: #4493f8; --danger: #f85149; } }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: flex; align-items: flex-start; justify-content: center; background: var(--bg); color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; padding: 48px 16px; }
.card { width: 100%; max-width: 560px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 28px 32px; }
.brand { margin: 0 0 4px; color: var(--muted); font-size: 14px; letter-spacing: .02em; }
h1 { margin: 0 0 20px; font-size: 22px; }
h2 { margin: 28px 0 10px; font-size: 17px; }
p { margin: 0 0 14px; }
label { display: block; margin: 0 0 14px; font-weight: 600; font-size: 14px; }
input[type=email], input[type=password], input[type=text], input[type=number] { display: block; width: 100%; margin-top: 6px; padding: 9px 10px;
  border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); font: inherit; }
fieldset { border: 1px solid var(--line); border-radius: 6px; margin: 0 0 14px; padding: 10px 12px; }
fieldset label { font-weight: 400; margin: 4px 0; }
button, .button { display: inline-block; padding: 9px 16px; border: 1px solid var(--accent); border-radius: 6px; background: var(--accent); color: #fff;
  font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
button.secondary { background: transparent; color: var(--fg); border-color: var(--line); }
button.danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.actions form { margin: 0; }
.error { padding: 10px 12px; border: 1px solid var(--danger); border-radius: 6px; color: var(--danger); margin-bottom: 16px; }
.muted { color: var(--muted); font-size: 14px; }
code, .secret { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; word-break: break-all; }
.secret { display: block; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); margin: 6px 0 14px; }
.qr { display: block; width: 220px; height: 220px; margin: 8px 0 16px; background: #fff; padding: 6px; border-radius: 6px; }
ul.codes { columns: 2; padding-left: 18px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; margin-bottom: 8px; }
th, td { text-align: left; padding: 6px 8px 6px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; margin: 0 0 16px; font-size: 14px; }
dt { color: var(--muted); }
dd { margin: 0; word-break: break-all; }