/* 导航栏基础样式 */
:root {
    --navbar-width: 240px;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--navbar-width);
    min-width: var(--navbar-width);
    max-width: var(--navbar-width);
    height: 100vh;
    padding: 0;
    transition: transform 0.3s ease;
    z-index: 1045;
}

/* Logo 样式 */
.navbar-logo {
    height: 32px;
    width: auto;
}

/* 导航菜单样式 */
.navbar-nav {
    --bs-nav-link-padding-y: 0.75rem;
}

.nav-link {
    color: var(--bs-body-color);
    display: flex;
    align-items: center;
    transition: all 0.2s ease;
}

.nav-link:hover:not(.active) {
    background-color: var(--bs-tertiary-bg);
}

.nav-link.active {
    color: var(--bs-primary);
    background-color: var(--bs-primary-bg-subtle);
}

/* 子菜单样式 */
.collapse .nav-link {
    padding-left: 2.5rem;
}

/* 下拉箭头动画 */
[data-bs-toggle="collapse"] .bi-chevron-down {
    transition: transform 0.2s;
}

[data-bs-toggle="collapse"][aria-expanded="true"] .bi-chevron-down {
    transform: rotate(180deg);
}

/* 分隔线样式 */
.dropdown-divider {
    margin: 0.5rem 1rem;
    opacity: 0.1;
}

/* 主内容区域左侧padding */
.ps-navbar {
    padding-left: var(--navbar-width);
}

/* 移动端导航切换按钮 */
.navbar-toggler {
    z-index: 1046;
    width: 42px;
    height: 42px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 主题切换按钮悬停效果 */
.theme-toggle:hover {
    background-color: var(--bs-secondary-bg);
}

/* 确保导航栏在认证页面时的阴影效果 */
.navbar.bg-white {
    box-shadow: 0 1px 3px rgba(0,0,0,.1);
}

/* 移动端适配 */
@media (max-width: 991.98px) {
    .ps-navbar {
        padding-left: 0 !important;
    }
    
    .navbar {
        transform: translateX(-100%);
    }

    .navbar.show {
        transform: translateX(0);
        box-shadow: var(--bs-box-shadow-lg);
    }

    .offcanvas-backdrop {
        z-index: 1040;
    }

    .offcanvas-backdrop.show {
        opacity: 0.5;
    }
}

/* 导航子菜单样式 */
.nav-submenu {
    margin-top: 0.25rem;
}

.nav-submenu .nav-link {
    font-size: 0.95rem;
    opacity: 0.85;
    transition: all 0.2s ease;
}

.nav-submenu .nav-link:hover {
    opacity: 1;
    background-color: var(--bs-primary-bg-subtle);
}

.nav-submenu .nav-link.active {
    background-color: var(--bs-primary);
    color: white;
    opacity: 1;
}

.nav-submenu .nav-link.active i {
    color: white;
}

/* 下拉箭头动画 */
.bi-chevron-down {
    transition: transform 0.2s ease;
}

[aria-expanded="true"] .bi-chevron-down {
    transform: rotate(180deg);
}

/* 导航项样式 */
.nav-item {
    width: 100%;
}

.nav-item .nav-link {
    width: 100%;
    color: var(--bs-nav-link-color);
}

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

.nav-item .nav-link.active {
    background-color: var(--bs-primary);
    color: white;
}