:root {
  --bg: #f4f6f4;
  --card: #ffffff;
  --text: #1d2621;
  --muted: #64706a;
  --accent: #2f6f4f;
  --accent-soft: #e3f0e8;
  --border: #dde3df;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #121614;
  --card: #1c221f;
  --text: #e8eeea;
  --muted: #95a39b;
  --accent: #6cc39a;
  --accent-soft: #23362c;
  --border: #2c3530;
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121614;
    --card: #1c221f;
    --text: #e8eeea;
    --muted: #95a39b;
    --accent: #6cc39a;
    --accent-soft: #23362c;
    --border: #2c3530;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
}

.topbar {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: calc(.75rem + env(safe-area-inset-top)) 1rem .75rem;
  background: var(--accent);
  color: #fff;
}
.topbar h1 { flex: 1; margin: 0; font-size: 1.25rem; }

.icon-btn {
  color: inherit;
  text-decoration: none;
  font-size: 1.4rem;
  line-height: 1;
  padding: .25rem .5rem;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
}
.card h2 { margin: 0 0 .5rem; font-size: 1.1rem; }
.card.mine, .card.highlight { border: 2px solid var(--accent); }
.card.highlight { background: var(--accent-soft); }
.card.error { border-color: #c0392b; color: #c0392b; }

.label {
  margin: .75rem 0 0;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted);
}
.who { margin: .1rem 0 0; font-size: 1.4rem; font-weight: 600; color: var(--accent); }
.when { margin: 0; color: var(--muted); }
.muted { color: var(--muted); }

.upcoming, .turns { list-style: none; margin: .25rem 0 0; padding: 0; }
.upcoming li, .turns li {
  display: flex;
  gap: 1rem;
  padding: .4rem 0;
  border-top: 1px solid var(--border);
}
.upcoming li:first-child, .turns li:first-child { border-top: none; }
.upcoming li.mine { font-weight: 600; color: var(--accent); }
.year { min-width: 3rem; font-variant-numeric: tabular-nums; color: var(--muted); }

form.card { display: grid; gap: 1.25rem; }
label { display: grid; gap: .35rem; font-weight: 600; }
label small { font-weight: 400; }
select {
  font: inherit;
  padding: .55rem .6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}