:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --text: #1f2330;
  --muted: #6b7185;
  --border: #dfe2ec;
  --accent: #3b6fd8;
  --pending: #f0a500;
  --confirmed: #2e9e5b;
  --free: #dff3e7;
  --danger: #c93c3c;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161d;
    --card: #1e212b;
    --text: #e8eaf2;
    --muted: #9aa1b5;
    --border: #2f3442;
    --free: #1f3a2b;
  }
}

* { 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;
}

.site-header { padding: 20px 16px 8px; text-align: center; }
.site-header h1 { margin: 0 0 8px; font-size: 1.6rem; }

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px 14px;
  font-size: 0.95rem;
}
.nav a { color: var(--accent); }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 16px;
}
.container.narrow { max-width: 420px; }

.hidden { display: none !important; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.card h2 { margin: 0 0 12px; font-size: 1.15rem; }
.card h3 { margin: 16px 0 8px; font-size: 1rem; color: var(--muted); }

.form-grid { display: grid; gap: 12px; }

label {
  display: grid;
  gap: 4px;
  font-size: 0.9rem;
  color: var(--muted);
}

input, select, button {
  font: inherit;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}
button {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.small { padding: 4px 8px; font-size: 0.85rem; }
button.secondary { background: transparent; color: var(--text); border-color: var(--border); }
button.danger { background: var(--danger); border-color: var(--danger); }
button.ok { background: var(--confirmed); border-color: var(--confirmed); }

.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab { background: transparent; color: var(--text); border: 1px solid var(--border); flex: 1; }
.tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.message { min-height: 1.2em; font-size: 0.9rem; margin: 8px 0 0; }
.message.error { color: var(--danger); }
.message.ok { color: var(--confirmed); }

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.list .empty { color: var(--muted); border-style: dashed; }
.meta { color: var(--muted); font-size: 0.85rem; }
.actions { display: flex; gap: 6px; align-items: center; }

.badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  color: #fff;
  text-transform: capitalize;
}
.badge.pending { background: var(--pending); }
.badge.confirmed { background: var(--confirmed); }
.badge.cancelled { background: var(--muted); }

/* Calendar */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 12px;
}
.swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  margin-right: 4px;
  vertical-align: -1px;
}
.swatch.pending { background: var(--pending); }
.swatch.confirmed { background: var(--confirmed); }
.swatch.free { background: var(--free); border: 1px solid var(--confirmed); }

.calendar-wrap { overflow-x: auto; }
.calendar {
  display: grid;
  grid-template-columns: repeat(7, minmax(92px, 1fr));
  gap: 4px;
  min-width: 660px;
}
.cal-head { font-size: 0.8rem; color: var(--muted); text-align: center; padding: 4px 0; }
.cal-day {
  min-height: 96px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.cal-day:hover { border-color: var(--accent); }
.cal-day.blank { border: none; cursor: default; background: transparent; }
.cal-day.past { opacity: 0.45; }
.cal-day.today { border: 2px solid var(--accent); }
.cal-day.has-free { background: var(--free); }
.cal-day.selected { outline: 2px solid var(--accent); }
.cal-num { font-weight: 600; font-size: 0.85rem; }
.chip {
  font-size: 0.72rem;
  padding: 2px 5px;
  border-radius: 4px;
  color: #fff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chip.pending { background: var(--pending); }
.chip.confirmed { background: var(--confirmed); }
.chip.mine { outline: 2px solid var(--text); }