.sidebar {
  width: 220px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 16px 0;
  transition: width 0.25s ease;

  &.collapsed {
    width: 64px;

    .nav-menu,
    .sidebar-footer {
      padding: 0 8px;
    }

    .nav-label {
      display: none;
    }

    .nav-item {
      justify-content: center;
      padding: 10px;
      gap: 0;
    }
  }
}

.nav-menu {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 9999px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  white-space: nowrap;
  border: none;
  background: transparent;
  cursor: pointer;
  font-family: inherit;

  &:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
  }

  &.active {
    background: var(--primary);
    color: white;
  }
}

.nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-label {
  font-size: 14px;
  font-weight: 500;
}

.sidebar-footer {
  padding: 0 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 8px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  border-radius: 9999px;
  transition: all 0.2s ease;
  margin-top: 4px;

  &:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
  }
}

// 繁花如梦主题：侧边栏毛玻璃 + 激活项用主品牌色
[data-theme="blossom-dream"] .sidebar {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid rgba(255, 255, 255, 0.4);
}

[data-theme="blossom-dream"][data-mode="dark"] .sidebar {
  background: rgba(34, 30, 36, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

// 激活项：主品牌色纵向微渐变
[data-theme="blossom-dream"] .nav-item.active {
  background: linear-gradient(180deg, #D4849A 0%, #C4748A 100%);
}

// 深色激活项：用藕粉色，背景深灰底 + 粉色文字/图标（高阶玩法）
[data-theme="blossom-dream"][data-mode="dark"] .nav-item.active {
  background: rgba(209, 158, 187, 0.15);
  color: #D19EBB;
  border: 1px solid rgba(209, 158, 187, 0.2);
}