:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --text: #1c1b19;
  --muted: #6b6860;
  --border: #dedbd3;
  --accent: #1f4e79;
  --accent-text: #ffffff;
  --danger: #a3261b;
  --warn: #8a5a00;
  --ok: #1d6b3a;
  --radius: 8px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161614;
    --surface: #201f1c;
    --text: #ecebe6;
    --muted: #a3a097;
    --border: #3a3833;
    --accent: #7fb2e5;
    --accent-text: #0e1a26;
    --danger: #f08a7e;
    --warn: #e0b35c;
    --ok: #7fcf98;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.5; }
a { color: var(--accent); }
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.75rem 1rem; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; text-decoration: none; color: var(--text); letter-spacing: 0.02em; }
.topbar nav { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.page { max-width: 880px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }
h1 { font-size: 1.6rem; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.15rem; margin: 1.5rem 0 0.5rem; }
.muted { color: var(--muted); }
.warn { color: var(--warn); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; }
.card h2 { margin-top: 0; }
.card.disabled { opacity: 0.6; }

form p, form div { margin-bottom: 0.75rem; }
label { display: block; font-weight: 600; margin-bottom: 0.25rem; }
input[type=text], input[type=email], input[type=password], input[type=url], textarea, select {
  width: 100%; max-width: 28rem; padding: 0.5rem 0.6rem; font: inherit; color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: 6px;
}
input[readonly] { color: var(--muted); }
button, .button {
  display: inline-block; padding: 0.5rem 1rem; font: inherit; font-weight: 600; cursor: pointer;
  color: var(--accent-text); background: var(--accent); border: 1px solid var(--accent);
  border-radius: 6px; text-decoration: none;
}
button.secondary, .button.secondary { background: transparent; color: var(--accent); }
button.link { background: none; border: none; padding: 0; color: var(--accent); font-weight: 400; }
button.danger, .danger { color: var(--danger); }
form.inline { display: inline; margin: 0; }
.row { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: flex-start; }
.row input { flex: 1 1 16rem; }
input.copy { max-width: 100%; font-family: ui-monospace, monospace; font-size: 0.85rem; }

.messages { list-style: none; padding: 0; margin: 0 0 1rem; }
.message, .notice { padding: 0.6rem 0.9rem; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); margin-bottom: 0.5rem; }
.message.error { border-color: var(--danger); }
.message.success { border-color: var(--ok); }
.errorlist { color: var(--danger); padding-left: 1rem; margin: 0.25rem 0; }

table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
th, td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 0.85rem; color: var(--muted); font-weight: 600; }
@media (max-width: 640px) { table { display: block; overflow-x: auto; } }

.badge { display: inline-block; font-size: 0.75rem; padding: 0.05rem 0.45rem; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); font-weight: 600; }
.badge.pending { color: var(--accent); border-color: var(--accent); }
.badge.used { color: var(--ok); border-color: var(--ok); }
.badge.revoked, .badge.expired { color: var(--muted); }