:root {
  --bg: #f7f7fa; --fg: #1c1c22; --muted: #686874; --card: #ffffff; --line: #e3e3ea;
  --accent: #5b5bd6; --accent-fg: #ffffff; --danger: #d93b40; --ok: #1f8a4c; --warn: #b7791f;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #131316; --fg: #e8e8ee; --muted: #9a9aa8; --card: #1d1d22; --line: #2e2e36; --accent: #8b8bf0; --accent-fg: #101014; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
header { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; padding: 14px 24px; border-bottom: 1px solid var(--line); background: var(--card); }
.brand { font-weight: 700; font-size: 18px; color: var(--fg); text-decoration: none; }
.brand span { color: var(--accent); }
nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 16px; }
nav a { color: var(--fg); text-decoration: none; }
nav a:hover { color: var(--accent); }
main { max-width: 1040px; margin: 0 auto; padding: 24px; }
footer { text-align: center; color: var(--muted); font-size: 12px; padding: 24px; }
h1 { font-size: 26px; margin: 8px 0 16px; }
h2 { font-size: 17px; margin: 0 0 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px; margin-bottom: 16px; overflow-x: auto; }
.narrow { max-width: 460px; margin: 32px auto; }
.center { text-align: center; }
.muted { color: var(--muted); font-size: 14px; }
.error { color: var(--danger); font-weight: 600; }
.notice { color: var(--ok); font-weight: 600; }
label { display: block; margin: 0 0 12px; font-size: 14px; color: var(--muted); }
input { display: block; width: 100%; margin-top: 4px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--fg); font: inherit; }
button, .button { display: inline-block; padding: 10px 18px; border: 0; border-radius: 999px; background: var(--accent); color: var(--accent-fg); font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button.danger { background: var(--danger); color: #fff; }
button.small { padding: 5px 12px; font-size: 13px; }
button.link { background: none; color: var(--fg); padding: 0; font-weight: 400; }
button.link:hover { color: var(--accent); }
form.inline { display: inline-flex; gap: 6px; align-items: center; margin: 0; }
form.inline input { display: inline-block; width: auto; margin: 0; padding: 5px 8px; }
input.tiny { width: 96px !important; }
form.row { display: flex; gap: 8px; }
form.row input { margin: 0; }
.spaced { margin-top: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.revoked, tr.failed { color: var(--muted); }
tr.failed td:last-child { color: var(--danger); }
.actions { display: flex; flex-wrap: wrap; gap: 6px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 16px; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px 20px; }
.tile .big { display: block; font-size: 28px; font-weight: 700; }
.tile span:last-child { color: var(--muted); font-size: 13px; }
.chart svg { width: 100%; height: auto; margin-bottom: 12px; }
.chart .bar { fill: var(--accent); }
.chart text { fill: var(--muted); font-size: 11px; }
.qr { background: #fff; display: inline-block; padding: 12px; border-radius: 12px; }
.qr svg { width: 240px; height: 240px; display: block; }
.code { font-size: 32px; font-weight: 700; letter-spacing: 4px; font-family: ui-monospace, Consolas, monospace; }
code { font-family: ui-monospace, Consolas, monospace; background: var(--bg); padding: 2px 6px; border-radius: 6px; }
.copy code { user-select: all; word-break: break-all; }