/**
 * Modern Sidebar Layout Styles
 * Attractive header, sidebar, and footer design
 */

:root {
    --sidebar-width: 260px;
    --header-height: 70px;
    --footer-height: 60px;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --sidebar-bg: #1e293b;
    --sidebar-hover: #334155;
    --sidebar-active: #3b82f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

/* Layout Container */
.app-layout {
    display: flex;
    min-height: 100vh;
    background: #f8fafc;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: white;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: #1e293b;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* Sidebar Header */
.sidebar-header {
    padding: 1.5rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    color: white;
    flex-shrink: 0;
}

.sidebar-brand {
    flex: 1;
    min-width: 0;
}

.sidebar-brand h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0;
    color: white;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-brand p {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Sidebar Menu */
.sidebar-menu {
    padding: 1rem 0;
}

.sidebar-menu-item {
    margin: 0.25rem 0.75rem;
}

.sidebar-menu-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.sidebar-menu-link:hover {
    background: var(--sidebar-hover);
    color: white;
    transform: translateX(4px);
}

.sidebar-menu-link.active {
    background: var(--sidebar-active);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.sidebar-menu-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: white;
    border-radius: 0 3px 3px 0;
}

.sidebar-menu-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.sidebar-menu-text {
    flex: 1;
    white-space: nowrap;
}

.sidebar-menu-arrow {
    font-size: 0.7rem;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.sidebar-menu-item.has-submenu.open .sidebar-menu-arrow {
    transform: rotate(90deg);
}

/* Sidebar Submenu */
.sidebar-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius);
    margin-top: 0.25rem;
}

.sidebar-menu-item.has-submenu.open .sidebar-submenu {
    max-height: 500px;
}

.sidebar-submenu-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.3s ease;
    font-size: 0.9rem;
    position: relative;
}

.sidebar-submenu-link:hover {
    background: var(--sidebar-hover);
    color: white;
    padding-left: 3rem;
}

.sidebar-submenu-link.active {
    background: rgba(59, 130, 246, 0.2);
    color: white;
}

.sidebar-submenu-link.active::before {
    content: '';
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: white;
    border-radius: 50%;
}

/* Main Content Area */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Top Header */
.top-header {
    height: var(--header-height);
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    border-bottom: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius);
    transition: background 0.3s ease;
}

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

.header-search {
    position: relative;
    width: 300px;
}

.header-search input {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.header-search input:focus {
    outline: none;
    border-color: var(--sidebar-active);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.header-search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-notifications {
    position: relative;
    background: none;
    border: none;
    font-size: 1.3rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.header-notifications:hover {
    background: var(--light-color);
    color: var(--sidebar-active);
}

.notification-badge {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    width: 8px;
    height: 8px;
    background: var(--danger-color);
    border-radius: 50%;
    border: 2px solid white;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.3s ease;
    position: relative;
}

.header-user:hover {
    background: var(--light-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.user-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.user-name-header {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role-header {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: capitalize;
}

.user-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    padding: 0.5rem;
    display: none;
    z-index: 1000;
}

.header-user.active .user-dropdown-menu {
    display: block;
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius);
    transition: background 0.3s ease;
    font-size: 0.9rem;
}

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

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

.user-dropdown-item.logout-item:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Content Area */
.content-area {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* Breadcrumb */
.breadcrumb {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--sidebar-active);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

/* Footer */
.app-footer {
    height: var(--footer-height);
    background: white;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    margin-left: var(--sidebar-width);
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.05);
}

.footer-left {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--sidebar-active);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

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

    .app-footer {
        margin-left: 0;
    }

    .sidebar-toggle {
        display: block;
    }

    .header-search {
        display: none;
    }

    .content-area {
        padding: 1rem;
    }

    .sidebar {
        width: 280px;
    }
}

/* Overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    backdrop-filter: blur(2px);
}

.sidebar-overlay.active {
    display: block;
}

/* Smooth transitions */
* {
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
}