:root {
  --bg: #f6f7f9;
  --fg: #1d2129;
  --muted: #6b7280;
  --card: #ffffff;
  --line: #e2e5ea;
  --accent: #3d5afe;
  --accent-fg: #ffffff;
  --danger: #b3261e;
  --today: #eef1ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #e6e8ec;
    --muted: #9aa1ac;
    --card: #1c1f25;
    --line: #2b2f37;
    --accent: #7c8cff;
    --accent-fg: #10131a;
    --danger: #f28079;
    --today: #23283a;
  }
}

* { box-sizing: border-box; }

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

main { max-width: 1000px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 1.25rem;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 650; text-decoration: none; color: var(--fg); }
.topbar nav { display: flex; align-items: center; gap: 1rem; }
.topbar nav a { color: var(--fg); text-decoration: none; }
.topbar nav a:hover { text-decoration: underline; }
.who { color: var(--muted); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.card.centered { max-width: 32rem; margin: 3rem auto; text-align: center; }
.card.highlight { border-color: var(--accent); }

h1 { font-size: 1.4rem; margin: 0 0 .5rem; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.error { color: var(--danger); }

.button {
  display: inline-block;
  padding: .45rem .85rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: transparent;
  color: var(--fg);
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}
.button:hover { border-color: var(--accent); }
.button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.button.danger { color: var(--danger); }

.month-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.month-header h1 { margin: 0; }

table.month { width: 100%; border-collapse: collapse; margin-top: 1rem; table-layout: fixed; }
table.month th {
  padding: .4rem; font-size: .8rem; text-transform: uppercase;
  color: var(--muted); font-weight: 600; text-align: left;
}
table.month td {
  vertical-align: top;
  height: 6.5rem;
  border: 1px solid var(--line);
  padding: .3rem;
  overflow: hidden;
}
table.month td.other-month { background: color-mix(in srgb, var(--bg) 60%, transparent); color: var(--muted); }
table.month td.today { background: var(--today); }
.daynum { display: block; font-size: .8rem; color: var(--muted); margin-bottom: .2rem; }
td.today .daynum { color: var(--accent); font-weight: 700; }

.event {
  display: block;
  font-size: .78rem;
  padding: .1rem .3rem;
  margin-bottom: .15rem;
  border-radius: 4px;
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border-left: 3px solid var(--accent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.event.all-day { border-left-style: dotted; }

ul.agenda { list-style: none; margin: 0; padding: 0; }
ul.agenda li { display: flex; gap: 1rem; padding: .5rem 0; border-bottom: 1px solid var(--line); }
ul.agenda li:last-child { border-bottom: none; }
.when { flex: 0 0 11rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.desc { color: var(--muted); font-size: .88rem; white-space: pre-wrap; }

.inline-form { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: 1rem; }
.inline-form input[type=text] {
  flex: 1 1 16rem;
  padding: .45rem .6rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg);
  color: var(--fg);
  font: inherit;
}

pre.secret {
  font-size: 1.05rem;
  padding: .8rem;
  background: var(--bg);
  border: 1px dashed var(--accent);
  border-radius: 7px;
  overflow-x: auto;
  user-select: all;
}

dl.settings-list { display: grid; grid-template-columns: minmax(6rem, max-content) 1fr; gap: .35rem 1rem; margin: 0; }
dl.settings-list dt { color: var(--muted); }
dl.settings-list dd { margin: 0; overflow-wrap: anywhere; }

table.listing { width: 100%; border-collapse: collapse; }
table.listing th { text-align: left; font-size: .8rem; color: var(--muted); padding: .4rem 0; }
table.listing td { padding: .5rem 0; border-top: 1px solid var(--line); }
table.listing td:last-child { text-align: right; }

@media (max-width: 640px) {
  table.month td { height: 4.5rem; font-size: .8rem; }
  .event { font-size: .68rem; }
  ul.agenda li { flex-direction: column; gap: .15rem; }
  .when { flex: none; }
}