/**
 * 侧边栏组件样式
 */

.sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-primary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    transition: width var(--transition-normal);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-logo {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-logo .logo-icon {
    font-size: 1.5rem;
    margin-right: var(--spacing-sm);
}

.sidebar-logo .logo-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
}

.sidebar.collapsed .logo-text {
    display: none;
}

/* 导航菜单 */
.nav-menu {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md) 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    margin: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.nav-item.active {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: var(--color-text-inverse);
    font-weight: 500;
}

.nav-item .nav-icon {
    width: 20px;
    text-align: center;
    margin-right: var(--spacing-md);
    font-size: 1.1rem;
}

.sidebar.collapsed .nav-item .nav-text {
    display: none;
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: var(--spacing-md);
}

.sidebar.collapsed .nav-item .nav-icon {
    margin-right: 0;
}

/* 父级菜单项 */
.nav-parent {
    justify-content: flex-start;
}

.nav-arrow {
    margin-left: auto;
    font-size: 0.65rem;
    opacity: 0.6;
    transition: transform var(--transition-fast);
}

.nav-parent.expanded .nav-arrow {
    opacity: 1;
}

.sidebar.collapsed .nav-arrow {
    display: none;
}

/* 子菜单 */
.nav-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
    background: var(--color-bg-secondary);
    margin: 0 var(--spacing-sm);
    border-radius: var(--radius-md);
}

.nav-submenu.show {
    max-height: 500px;
}

.nav-submenu .nav-item {
    padding-left: calc(var(--spacing-lg) + 20px);
    font-size: 0.9rem;
    margin: 0;
    border-radius: 0;
}

.nav-submenu .nav-item:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.nav-submenu .nav-item:last-child {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* 侧边栏底部 */
.sidebar-footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

.sidebar-footer .nav-item {
    margin: var(--spacing-xs) var(--spacing-sm);
}

.sidebar-footer .help-link {
    background: var(--color-bg-secondary);
}

.sidebar-footer .help-link:hover {
    background: var(--color-bg-hover);
}

.sidebar-footer .help-link.active {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: var(--color-text-inverse);
}

.sidebar.collapsed .sidebar-footer .nav-text {
    display: none;
}

.sidebar.collapsed .sidebar-footer .nav-item {
    justify-content: center;
    padding: var(--spacing-md);
}

.sidebar.collapsed .sidebar-footer .nav-icon {
    margin-right: 0;
}