:root {
  --bg: #0f1419;
  --surface: #1a222d;
  --surface-hover: #232d3b;
  --border: #2d3a4d;
  --text: #e8eef5;
  --muted: #8b9bb0;
  --accent: #3d9cfd;
  --accent-dim: rgba(61, 156, 253, 0.15);
  --danger: #f07178;
  --holiday: #c792ea;
  --solar-term: #82aaff;
  --radius: 10px;
  --font: "Noto Sans TC", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #1e3a5f 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.45;
}

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.toolbar h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.toolbar .muted {
  margin: 0.25rem 0 0;
  font-size: 0.85rem;
}

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

.month-label {
  margin: 0 0 0 0.25rem;
  font-size: 1.15rem;
  font-weight: 600;
  min-width: 8rem;
}

.btn {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn:hover {
  background: var(--surface-hover);
}

.btn--ghost {
  background: transparent;
  min-width: 2.5rem;
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.35rem 0.5rem;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0e12;
  font-weight: 600;
}

.btn--primary:hover {
  filter: brightness(1.08);
}

.btn--sm {
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
}

.btn--danger {
  border-color: rgba(240, 113, 120, 0.5);
  color: var(--danger);
  background: transparent;
}

.btn--danger:hover {
  background: rgba(240, 113, 120, 0.12);
}

.layout {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 340px);
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.calendar-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  overflow: hidden;
}

.weekday-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 6px;
}

.weekday-cell {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  padding: 0.35rem 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.day-cell {
  min-height: 88px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: background 0.12s, border-color 0.12s;
}

.day-cell:hover {
  background: var(--surface-hover);
  border-color: var(--border);
}

.day-cell--outside {
  opacity: 0.38;
}

.day-cell--today {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.day-cell--selected {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.day-cell__num {
  font-size: 1rem;
  font-weight: 600;
}

.day-cell__lunar {
  font-size: 0.68rem;
  color: var(--muted);
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.day-cell__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  margin-top: auto;
}

.tag-pill {
  font-size: 0.6rem;
  padding: 1px 4px;
  border-radius: 4px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tag-pill--holiday {
  background: rgba(199, 146, 234, 0.2);
  color: var(--holiday);
}

.tag-pill--term {
  background: rgba(130, 170, 255, 0.18);
  color: var(--solar-term);
}

.tag-pill--event {
  background: rgba(61, 156, 253, 0.25);
  color: var(--accent);
}

.detail-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  position: sticky;
  top: 1rem;
}

.detail-solar {
  font-size: 1.35rem;
  font-weight: 700;
}

.detail-lunar {
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 0.75rem;
}

.tags .tag-pill {
  font-size: 0.72rem;
  padding: 3px 8px;
}

.events-section {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.events-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.events-header h3 {
  margin: 0;
  font-size: 1rem;
}

.event-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.event-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  background: rgba(255, 255, 255, 0.03);
}

.event-item__title {
  font-weight: 600;
  font-size: 0.95rem;
}

.event-item__meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.event-item__note {
  font-size: 0.82rem;
  margin-top: 0.35rem;
  color: var(--text);
  opacity: 0.9;
}

.event-item__actions {
  display: flex;
  gap: 6px;
  margin-top: 0.5rem;
}

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

.empty-hint {
  margin: 0.5rem 0 0;
  font-size: 0.88rem;
}

.hidden {
  display: none !important;
}

.event-form {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.event-form h4 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
}

.event-form label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.65rem;
}

.event-form input,
.event-form textarea {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.45rem 0.55rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}

.event-form textarea {
  resize: vertical;
  min-height: 72px;
}

.form-actions {
  display: flex;
  gap: 8px;
  margin-top: 0.75rem;
}