/* Sidebar 侧边栏样式 */
.sidebar {
  width: var(--sidebar-width); min-width: var(--sidebar-width);
  border-right: 1px solid var(--color-border);
  background: var(--color-bg); height: calc(100vh - var(--header-height));
  overflow-y: auto; position: sticky; top: var(--header-height);
  padding: 20px 0;
  transition: width 0.3s ease, min-width 0.3s ease, padding 0.3s ease, opacity 0.3s ease;
}
/* 收起状态 */
.sidebar.collapsed {
  width: 0; min-width: 0; padding: 0;
  overflow: hidden; border-right: none; opacity: 0;
}
/* 侧边栏切换按钮 */
.sidebar-toggle {
  position: sticky; top: calc(var(--header-height) + 50%);
  z-index: 10; width: 24px; height: 48px;
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-left: none; border-radius: 0 8px 8px 0;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  color: var(--color-text-muted); font-size: 14px;
  transition: all 0.2s; flex-shrink: 0;
  box-shadow: 2px 0 8px rgba(0,0,0,0.04);
}
.sidebar-toggle:hover {
  background: var(--color-bg-secondary); color: var(--color-text);
  width: 28px;
}
.sidebar-toggle .toggle-icon {
  display: inline-block; transition: transform 0.3s ease;
}
.sidebar-toggle.expanded .toggle-icon {
  transform: rotate(180deg);
}
.sidebar-section { padding: 0 16px; margin-bottom: 8px; }
.sidebar-section-title {
  font-size: var(--font-size-xs); font-weight: 600; color: var(--color-text-muted);
  text-transform: uppercase; letter-spacing: 0.5px; padding: 8px 8px 4px;
}
.sidebar-category { margin-bottom: 4px; }
.sidebar-category-header {
  display: flex; align-items: center; gap: 8px; padding: 8px;
  border-radius: var(--border-radius); cursor: pointer; transition: all 0.2s;
  font-size: var(--font-size-base); font-weight: 500;
}
.sidebar-category-header:hover { background: var(--color-bg-secondary); }
.sidebar-category-header .cat-icon { font-size: 16px; }
.sidebar-category-header .cat-arrow {
  margin-left: auto; font-size: 10px; color: var(--color-text-muted);
  transition: transform 0.2s;
}
.sidebar-category-header.expanded .cat-arrow { transform: rotate(90deg); }
.sidebar-styles { display: none; padding-left: 32px; }
.sidebar-styles.show { display: block; }
.sidebar-style-item {
  padding: 6px 8px; border-radius: 6px; cursor: pointer;
  font-size: var(--font-size-sm); color: var(--color-text-secondary);
  transition: all 0.15s; display: flex; align-items: center; gap: 6px;
}
.sidebar-style-item:hover { background: var(--color-bg-secondary); color: var(--color-text); }
.sidebar-style-item.active { background: var(--color-primary); color: var(--color-white); }
.sidebar-style-item .style-icon { font-size: 14px; }
.sidebar-divider { height: 1px; background: var(--color-divider); margin: 12px 16px; }
.sidebar-size-item {
  padding: 6px 8px 6px 40px; border-radius: 6px; cursor: pointer;
  font-size: var(--font-size-sm); color: var(--color-text-secondary); transition: all 0.15s;
}
.sidebar-size-item:hover { background: var(--color-bg-secondary); color: var(--color-text); }
.sidebar-size-item.active { color: var(--color-text); font-weight: 500; }
.sidebar-reset {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  margin: 16px 16px 0; padding: 8px; border: 1px solid var(--color-border);
  border-radius: var(--border-radius); background: none; color: var(--color-text-secondary);
  font-size: var(--font-size-sm); width: calc(100% - 32px); transition: all 0.2s;
}
.sidebar-reset:hover { border-color: var(--color-primary); color: var(--color-text); }
@media (max-width: 1024px) {
  .sidebar {
    position: fixed; left: -300px; top: var(--header-height); z-index: 90;
    transition: left 0.3s; box-shadow: none;
    width: 280px; min-width: 280px;
    height: calc(100vh - var(--header-height));
    padding: 20px 0;
    opacity: 1;
    border-right: 1px solid var(--color-border);
    background: var(--color-bg);
  }
  .sidebar.open { left: 0; box-shadow: 4px 0 20px rgba(0,0,0,0.1); }
  /* 移动端隐藏切换按钮 */
  .sidebar-toggle {
    display: none;
  }
}