:root {
  --text: #1a1a1a;
  --muted: #666;
  --line: #d0d0d0;
  --panel: #f6f6f6;
  --accent: #2257d6;
  --highlight: #fff4c2;
  --error: #b42318;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: #fff;
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main { max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; }
main.wide { max-width: 1000px; }

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 14px; margin: 16px 0 6px; color: var(--muted); font-weight: 600; }

.mono, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.fp { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; }
.fp dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 0; }
.fp dt { color: var(--muted); }
.fp dd { margin: 0; overflow-wrap: anywhere; }
.fp pre {
  margin: 0; max-height: 280px; overflow: auto; background: #fff;
  border: 1px solid var(--line); border-radius: 6px; padding: 8px; font-size: 12px;
}

.auth { margin-top: 20px; }
form, #create-passkey, #existing-passkey { display: flex; flex-wrap: wrap; align-items: end; gap: 8px; margin: 12px 0; }
#create-passkey p, #existing-passkey p { flex-basis: 100%; margin: 0 0 4px; }
label { display: flex; flex-direction: column; gap: 4px; color: var(--muted); font-size: 13px; }
input { font: inherit; padding: 7px 9px; border: 1px solid var(--line); border-radius: 6px; min-width: 240px; color: var(--text); }
input[readonly] { background: var(--panel); }
button {
  font: inherit; padding: 7px 14px; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--accent); background: var(--accent); color: #fff;
}
button.secondary { background: #fff; color: var(--accent); }
button:disabled { opacity: 0.5; cursor: default; }

.why { color: var(--muted); font-size: 13px; margin: 4px 0; }
.small { font-size: 13px; }
#status { min-height: 1.4em; }
#status.error { color: var(--error); }
#status.info { color: var(--text); }
.warn { background: var(--highlight); padding: 6px 10px; border-radius: 6px; }

header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
header h1 { margin-bottom: 4px; }
header p { margin: 0; overflow-wrap: anywhere; }

#graph { width: 100%; height: auto; max-height: 80vh; display: block; margin: 8px auto; }
#graph .edge { stroke: #999; stroke-width: 1.5; }
#graph circle { fill: #fff; stroke: #555; stroke-width: 1.5; }
#graph .user circle { fill: var(--panel); }
#graph .current circle { fill: var(--highlight); stroke: #000; stroke-width: 3; }
#graph text { font-size: 12px; text-anchor: middle; fill: var(--text); }
#graph text.mono { font-size: 11px; }

#passkeys { padding-left: 18px; margin: 0; }

@media (max-width: 520px) {
  input { min-width: 0; width: 100%; }
  label { flex-basis: 100%; }
}