/* ===== 侧边栏整体 ===== */
.sidebar-section {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
}

.sidebar-section:last-child {
  border-bottom: none;
}

.sidebar-scroll {
  flex: 1;
  overflow-y: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.sidebar-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== 迷你日历 ===== */
.mini-calendar {
  width: 100%;
}

.mini-cal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.mini-cal-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-primary);
}

.mini-cal-nav {
  display: flex;
  gap: 2px;
}

.mini-cal-nav button {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.mini-cal-nav button:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.mini-cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  text-align: center;
}

.mini-cal-day-header {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-tertiary);
  padding: 4px 0;
}

.mini-cal-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  border-radius: 50%;
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  position: relative;
}

.mini-cal-day:hover {
  background: var(--bg-hover);
}

.mini-cal-day.other-month {
  color: var(--text-tertiary);
  opacity: 0.4;
}

.mini-cal-day.today {
  background: var(--color-work);
  color: #fff;
  font-weight: 700;
}

.mini-cal-day.selected {
  background: var(--color-work-bg);
  color: var(--color-work);
  font-weight: 700;
}

.mini-cal-day.has-events::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-work);
}

/* ===== 搜索框 ===== */
.search-box {
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 8px 12px 8px 34px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  outline: none;
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--color-work);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.1);
}

.search-box input::placeholder {
  color: var(--text-tertiary);
}

.search-box .search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}

/* ===== 分类筛选 ===== */
.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.filter-tag {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid transparent;
  user-select: none;
}

.filter-tag:hover {
  background: var(--bg-hover);
}

.filter-tag.active {
  border-color: currentColor;
}

.filter-tag.cat-work.active { background: var(--color-work-bg); color: var(--color-work-text); border-color: var(--color-work); }
.filter-tag.cat-personal.active { background: var(--color-personal-bg); color: var(--color-personal-text); border-color: var(--color-personal); }
.filter-tag.cat-study.active { background: var(--color-study-bg); color: var(--color-study-text); border-color: var(--color-study); }
.filter-tag.cat-health.active { background: var(--color-health-bg); color: var(--color-health-text); border-color: var(--color-health); }
.filter-tag.cat-other.active { background: var(--color-other-bg); color: var(--color-other-text); border-color: var(--color-other); }

/* ===== 事件列表 ===== */
.event-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.event-list-date-group {
  margin-bottom: var(--space-md);
}

.event-list-date-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--text-tertiary);
  padding: var(--space-xs) 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.event-list-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.event-list-item:hover {
  background: var(--bg-hover);
}

.event-list-item.selected {
  background: var(--color-work-bg);
  border-color: var(--color-work);
}

.event-list-color {
  width: 4px;
  min-height: 100%;
  border-radius: 2px;
  flex-shrink: 0;
  align-self: stretch;
}

.event-list-content {
  flex: 1;
  min-width: 0;
}

.event-list-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.event-list-time {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-top: 2px;
}

.event-list-badge {
  display: inline-block;
  margin-top: 4px;
  padding: 1px 8px;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 600;
}

/* ===== 数据操作区 ===== */
.data-actions {
  display: flex;
  gap: var(--space-xs);
}

.data-actions .btn {
  flex: 1;
  font-size: var(--font-size-xs);
  padding: 6px 8px;
}

/* ===== 移动端底部导航 ===== */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-sm);
  z-index: 100;
  justify-content: space-around;
}

.mobile-nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 4px 12px;
  font-size: 10px;
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
}

.mobile-nav-btn.active {
  color: var(--color-work);
}

.mobile-nav-btn i {
  font-size: 18px;
}

@media (max-width: 768px) {
  .mobile-nav {
    display: flex;
  }

  .calendar-area {
    padding-bottom: 60px;
  }
}