:root {
  --bg: #f6f6f4;
  --surface: #ffffff;
  --fg: #1c1c1a;
  --muted: #66655f;
  --line: #deddd7;
  --accent: #2f5d50;
  --accent-fg: #ffffff;
  --danger: #a3312a;
  --warn-bg: #fbf3e0;
  --danger-bg: #fbe9e7;
  --ok-bg: #e8f3ee;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161614;
    --surface: #1f1f1c;
    --fg: #ecebe6;
    --muted: #a3a29b;
    --line: #34332f;
    --accent: #7fbfa9;
    --accent-fg: #10120f;
    --danger: #f08a80;
    --warn-bg: #3a3220;
    --danger-bg: #3d2421;
    --ok-bg: #1f3329;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font:
    16px / 1.5 system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
}

.page {
  max-width: 28rem;
  margin: 0 auto;
  padding: 3rem 1rem;
}

.page.wide {
  max-width: 64rem;
}

.brand {
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.mark {
  font-size: 1.4rem;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
}

h1,
h2 {
  margin: 0;
  font-size: 1.3rem;
}

h2 {
  font-size: 1.1rem;
}

p {
  margin: 0;
}

.muted {
  color: var(--muted);
}

label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.button {
  display: inline-block;
  padding: 0.55rem 1rem;
  font: inherit;
  font-weight: 600;
  color: var(--fg);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}

.button.primary {
  color: var(--accent-fg);
  background: var(--accent);
  border-color: var(--accent);
}

.button.danger {
  color: var(--danger);
  border-color: var(--danger);
}

.button:disabled {
  opacity: 0.6;
  cursor: default;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.banner {
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  border-radius: 0.5rem;
  background: var(--warn-bg);
}

.banner.danger {
  background: var(--danger-bg);
}

.banner.ok {
  background: var(--ok-bg);
}

.codes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.25rem 1rem;
  font-family: ui-monospace, monospace;
}

.qr {
  width: 12rem;
  height: 12rem;
  background: #ffffff;
  padding: 0.5rem;
  border-radius: 0.5rem;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  padding: 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

td.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

form.admin-action {
  display: inline-flex;
}

form.admin-action.invite {
  display: flex;
}

ul.plain {
  list-style: none;
  margin: 0;
  padding: 0;
}

ul.plain li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--line);
}