:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #16181d;
  --muted: #646b78;
  --border: #dfe2e8;
  --accent: #2b59c3;
  --accent-text: #ffffff;
  --danger: #c0352b;
  --ok: #1f7a4d;
  --warn-bg: #fff6e0;
  --warn-border: #f0d48a;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --surface: #1a1d23;
    --text: #e8eaee;
    --muted: #9aa1ad;
    --border: #2e333c;
    --accent: #6b91ec;
    --accent-text: #0d1020;
    --danger: #f07b70;
    --ok: #5cc98f;
    --warn-bg: #2d2615;
    --warn-border: #5c4a1c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main { max-width: 1200px; margin: 0 auto; padding: 16px; }
main.narrow { max-width: 520px; padding-top: 48px; }

h1 { font-size: 22px; margin: 0; letter-spacing: -0.01em; }
h2 { font-size: 17px; margin: 0 0 14px; }
h3 { font-size: 16px; margin: 0 0 8px; }

.muted, .hint, small { color: var(--muted); }
small { display: block; font-size: 12px; margin-top: 2px; }
.mono { font-family: var(--mono); font-size: 13px; word-break: break-all; }

.brand { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.brand p { margin: 0; }
main.narrow .brand { margin-bottom: 20px; }

.badge {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px 0;
}
.topbar .brand { max-width: 1200px; margin: 0 auto 10px; }
.tabs { max-width: 1200px; margin: 0 auto; display: flex; gap: 4px; }
.tabs button {
  background: none;
  color: var(--muted);
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 8px 12px;
}
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.card-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.card-head h2 { margin: 0 auto 0 0; }

label { display: block; font-size: 13px; font-weight: 500; color: var(--muted); }
label.inline { display: inline-flex; align-items: center; gap: 6px; font-weight: 400; }
label > input, label > select, label > textarea, label > .suffix { margin-top: 4px; }

input, select, textarea, button { font: inherit; }
input, select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}
label.inline input, label.inline select { width: auto; margin: 0; }
input:focus, select:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { resize: vertical; }

.suffix { display: flex; align-items: center; gap: 8px; }
.suffix span { color: var(--text); font-weight: 600; }

button {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  cursor: pointer;
}
button.secondary { background: transparent; color: var(--text); border-color: var(--border); }
button.danger { background: transparent; color: var(--danger); border-color: var(--border); }
button.small { padding: 3px 10px; font-size: 13px; font-weight: 500; }
button:disabled { opacity: 0.6; cursor: progress; }

form { display: grid; gap: 14px; }
.grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.grid .span { grid-column: 1 / -1; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }

.error { color: var(--danger); margin: 0; }
.ok { color: var(--ok); }

.notice {
  margin-top: 16px;
  padding: 14px;
  border-radius: 8px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
}
.notice pre { margin: 10px 0; white-space: pre-wrap; font-size: 15px; line-height: 1.8; }
.warn { padding: 10px 12px; border-radius: 8px; background: var(--warn-bg); border: 1px solid var(--warn-border); font-size: 14px; }

.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0 0 18px; }
.facts dt { color: var(--muted); font-size: 13px; }
.facts dd { margin: 0; }

.big { font-size: 28px; font-weight: 700; margin: 4px 0 14px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
th.num, td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.actions { white-space: nowrap; text-align: right; }
td.actions button + button { margin-left: 6px; }
.empty { color: var(--muted); text-align: center; padding: 20px; margin: 0; }

.status { font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); white-space: nowrap; }
.status.active { color: var(--accent); border-color: var(--accent); }
.status.used { color: var(--ok); border-color: var(--ok); }
.status.pending { color: var(--danger); border-color: var(--danger); }
.status.revoked { color: var(--muted); }

a { color: var(--accent); }

dialog {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 20px;
  width: min(460px, calc(100vw - 32px));
}
dialog::backdrop { background: rgb(0 0 0 / 0.45); }

[hidden] { display: none !important; }