:root {
  --bg: #f6f6f4;
  --surface: #ffffff;
  --text: #1c1d1f;
  --muted: #6a6d73;
  --line: #e3e3df;
  --accent: #2f5d8a;
  --accent-strong: #234a70;
  --accent-soft: #e7eef6;
  --danger: #b3261e;
  --danger-soft: #fbeceb;
  --ok: #2e7d4f;
  --bar: #dfe6ee;
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131416;
    --surface: #1c1d20;
    --text: #e8e8e6;
    --muted: #9a9ca1;
    --line: #2d2f33;
    --accent: #7fb0e0;
    --accent-strong: #a6c9ec;
    --accent-soft: #22303e;
    --danger: #f2877f;
    --danger-soft: #3a2120;
    --ok: #7ccf9c;
    --bar: #2b3440;
    color-scheme: dark;
  }
}

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

html, body { margin: 0; }

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

a { color: var(--accent); text-decoration: none; }
a:hover, a:focus-visible { color: var(--accent-strong); text-decoration: none; }

.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; border-bottom: 1px solid var(--line); background: var(--surface);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: .01em; }
.mark { width: 14px; height: 14px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

main { max-width: 1040px; margin: 0 auto; padding: 24px 16px 64px; }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; margin-bottom: 20px;
}
.card.narrow { max-width: 480px; margin: 48px auto; }

h1 { font-size: 20px; margin: 0 0 12px; }
h2 { font-size: 17px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 18px 0 8px; }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.error { color: var(--danger); }

.row { display: flex; align-items: center; gap: 10px; }
.row.between { justify-content: space-between; }
.row.wrap { flex-wrap: wrap; }
.inline { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); }

input {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; min-width: 0;
}
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input[type=number] { width: 110px; }
#token { width: 100%; margin-bottom: 10px; }
#login-form { display: flex; flex-direction: column; align-items: stretch; }

button {
  font: inherit; cursor: pointer; border-radius: 8px; padding: 8px 14px;
  border: 1px solid var(--accent); background: var(--accent); color: var(--surface);
  transition: background-color .12s, color .12s, border-color .12s;
}
button:hover, button:focus-visible { background: var(--accent-strong); border-color: var(--accent-strong); }
button.ghost { background: transparent; color: var(--accent); border-color: var(--line); }
button.ghost:hover, button.ghost:focus-visible { background: var(--accent-soft); color: var(--accent-strong); }
button.danger { background: transparent; color: var(--danger); border-color: var(--line); }
button.danger:hover, button.danger:focus-visible { background: var(--danger-soft); border-color: var(--danger); }
button.small { padding: 4px 10px; font-size: 13px; }
button:disabled { opacity: .5; cursor: default; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; white-space: nowrap; }
th { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
tbody tr { transition: background-color .12s; }
tbody tr:hover { background: var(--accent-soft); }
tbody tr.selected { background: var(--accent-soft); }
td.id { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; color: var(--muted); }
td.actions { text-align: right; }

.usage { min-width: 180px; }
.bar { height: 6px; border-radius: 3px; background: var(--bar); overflow: hidden; margin-top: 4px; }
.bar > span { display: block; height: 100%; background: var(--accent); }
.bar.full > span { background: var(--danger); }

.state-ok { color: var(--ok); }
.state-revoked { color: var(--danger); }

.invite { display: flex; gap: 28px; flex-wrap: wrap; align-items: flex-start; margin: 8px 0 4px; }
.invite > div:first-child { flex: 1 1 260px; }
#qr { background: #fff; border-radius: 8px; border: 1px solid var(--line); display: block; }
.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 18px; letter-spacing: .08em;
  margin: 10px 0 2px; user-select: all;
}

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 8px; margin: 0;
}
.toast.bad { background: var(--danger); color: #fff; }

@media (max-width: 640px) {
  .top { padding: 12px 16px; }
  .card { padding: 16px; }
}