:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1f2328;
  --muted-fg: #8b949e;
  --border: #e5e7eb;
  --weekend-sat: #2563eb;
  --weekend-sun: #dc2626;
  --today-bg: #dc2626;
  --cell-bg: #ffffff;
  --cell-bg-out: #f6f7f8;
  --toolbar-bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171a;
    --fg: #e6e6e6;
    --muted-fg: #7d8590;
    --border: #2d333b;
    --cell-bg: #1b1f23;
    --cell-bg-out: #14171a;
    --toolbar-bg: #1b1f23;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 16px 40px;
}

.toolbar {
  position: sticky;
  top: 0;
  background: var(--toolbar-bg);
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

a.today-btn {
  display: inline-block;
  text-decoration: none;
}

.month-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  min-width: 8em;
  text-align: center;
}

.nav-btn, .today-btn {
  border: 1px solid var(--border);
  background: var(--cell-bg);
  color: var(--fg);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 1rem;
  cursor: pointer;
}
.nav-btn:hover, .today-btn:hover { background: var(--cell-bg-out); }

#todayBtn {
  font-size: 0.8rem;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--border);
  background: var(--cell-bg);
  color: var(--fg);
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
}
.icon-btn:hover { background: var(--cell-bg-out); }

.legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--fg);
}
.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}

.status-bar {
  margin: 10px 0;
  padding: 8px 12px;
  border-radius: 6px;
  background: #fff3cd;
  color: #664d03;
  font-size: 0.85rem;
}

.calendar-wrap {
  margin-top: 8px;
}

.weekday-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  padding: 6px 0;
}
.weekday-row div {
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted-fg);
  font-weight: 600;
}
.weekday-row div:nth-child(6) { color: var(--weekend-sat); }
.weekday-row div:last-child { color: var(--weekend-sun); }

.calendar-body {
  display: flex;
  flex-direction: column;
}

.week-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  position: relative;
  border-top: 1px solid var(--border);
}
.week-row:last-child { border-bottom: 1px solid var(--border); }

.day-cell {
  grid-row: 1 / -1;
  border-right: 1px solid var(--border);
  background: var(--cell-bg);
  min-height: 100%;
}
.day-cell:last-child { border-right: none; }
.day-cell.out-of-month { background: var(--cell-bg-out); }

.day-number {
  grid-row: 1;
  padding: 4px 6px;
  font-size: 0.8rem;
  color: var(--fg);
  display: flex;
  justify-content: flex-end;
}
.day-number.out-of-month { color: var(--muted-fg); }
.day-number.sunday { color: var(--weekend-sun); }
.day-number.saturday { color: var(--weekend-sat); }

.day-number .num {
  min-width: 1.6em;
  height: 1.6em;
  line-height: 1.6em;
  text-align: center;
  border-radius: 50%;
}
.day-number.today .num {
  background: var(--today-bg);
  color: #fff;
  font-weight: 700;
}

.event-bar {
  grid-row: span 1;
  margin: 1px 0;
  padding: 1px 6px;
  font-size: 0.62rem;
  line-height: 18px;
  height: 18px;
  color: #fff;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  cursor: default;
}
.event-bar.round-left { border-top-left-radius: 9px; border-bottom-left-radius: 9px; margin-left: 3px; }
.event-bar.round-right { border-top-right-radius: 9px; border-bottom-right-radius: 9px; margin-right: 3px; }
.event-bar.continue-left { margin-left: 0; }
.event-bar.continue-right { margin-right: 0; }

.empty-state, .loading-state {
  padding: 40px;
  text-align: center;
  color: var(--muted-fg);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}
.modal-backdrop[hidden] {
  display: none;
}

.modal {
  position: relative;
  background: var(--cell-bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  min-width: 260px;
  max-width: 90vw;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.modal h2 {
  margin: 0 28px 14px 0;
  font-size: 1.1rem;
}

.modal-row {
  display: flex;
  gap: 10px;
  padding: 6px 0;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}
.modal-row:first-of-type { border-top: none; }

.modal-label {
  color: var(--muted-fg);
  min-width: 5.5em;
  flex-shrink: 0;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  border: none;
  background: none;
  color: var(--muted-fg);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  padding: 4px;
}
.modal-close:hover { color: var(--fg); }