/**
 * FitMate - Layout Styles
 * 侧边栏、Header、主内容区布局样式
 */

/* ========================================
   Main Layout - 主布局
   ======================================== */

/* 整体容器 */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* 主内容区域 */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
    display: flex;
    flex-direction: column;
}

/* 内容区域（包含 Header + 内容） */
.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    padding-top: calc(var(--header-height) + var(--spacing-lg));
}

/* ========================================
   Sidebar - 侧边栏
   ======================================== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: width var(--transition-normal);
}

/* 侧边栏头部 */
.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

/* Logo 样式 */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    font-weight: 700;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

/* 侧边栏导航 */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 14px;
    font-weight: 500;
}

.nav-link i {
    font-size: 18px;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.nav-link:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* 导航项激活状态 */
.nav-link.active {
    background: var(--primary);
    color: white;
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: var(--primary-dark);
    border-radius: 0 2px 2px 0;
}

/* 侧边栏底部用户区域 */
.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.user-info:hover {
    background: var(--background);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: inherit;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 12px;
    color: var(--text-muted);
}

/* ========================================
   Header - 顶部栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    height: var(--header-height);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: 999;
    transition: left var(--transition-normal);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* 侧边栏切换按钮（移动端） */
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--background);
    color: var(--text-primary);
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 14px;
}

.breadcrumb-item {
    color: var(--text-secondary);
}

.breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--primary);
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--text-muted);
}

/* 头部右侧 */
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* 通知按钮 */
.notification-btn {
    position: relative;
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.notification-btn:hover {
    background: var(--background);
    color: var(--text-primary);
}

.notification-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 16px;
    height: 16px;
    background: var(--danger);
    color: white;
    font-size: 10px;
    font-weight: 600;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

/* 用户菜单 */
.user-menu {
    position: relative;
    cursor: pointer;
}

.user-menu-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--border);
    transition: border-color var(--transition-fast);
}

.user-menu:hover .user-menu-avatar {
    border-color: var(--primary);
}

/* 用户下拉菜单 */
.user-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-sm));
    right: 0;
    min-width: 160px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-level3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
    z-index: 1000;
}

.user-menu.show .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all var(--transition-fast);
}

.user-dropdown-item:first-child {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.user-dropdown-item:last-child {
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.user-dropdown-item:hover {
    background: var(--background);
    color: var(--text-primary);
}

.user-dropdown-item.danger {
    color: var(--danger);
}

.user-dropdown-item.danger:hover {
    background: var(--danger-light);
}

/* ========================================
   Mobile Overlay - 移动端遮罩
   ======================================== */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.sidebar-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

/* ========================================
   Responsive - 响应式适配
   ======================================== */

/* 平板尺寸 - 992px */
@media (max-width: 992px) {
    .sidebar {
        width: var(--sidebar-collapsed);
    }

    .sidebar .logo-text,
    .sidebar .nav-link span,
    .sidebar .user-details {
        display: none;
    }

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

    .sidebar .user-info {
        justify-content: center;
    }

    .sidebar .logo {
        justify-content: center;
    }

    .main-wrapper {
        margin-left: var(--sidebar-collapsed);
    }

    .header {
        left: var(--sidebar-collapsed);
    }

    .sidebar-toggle {
        display: flex;
    }
}

/* 移动端尺寸 - 768px */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
        z-index: 1001;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .sidebar.mobile-open .logo-text,
    .sidebar.mobile-open .nav-link span,
    .sidebar.mobile-open .user-details {
        display: block;
    }

    .sidebar.mobile-open .nav-link {
        justify-content: flex-start;
    }

    .main-wrapper {
        margin-left: 0;
    }

    .header {
        left: 0;
    }

    .sidebar-overlay {
        display: block;
    }

    .main-content {
        padding: var(--spacing-md);
        padding-top: calc(var(--header-height) + var(--spacing-md));
    }
}