/* Modern Sidebar Navigation 2026 - Professional Design */

/* Sidebar Variables */
:root {
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --sidebar-bg: linear-gradient(180deg, 
        rgba(15, 23, 42, 0.95) 0%, 
        rgba(30, 41, 59, 0.95) 100%);
    --sidebar-border: rgba(71, 85, 105, 0.3);
    --sidebar-item-hover: rgba(99, 102, 241, 0.15);
    --sidebar-item-active: var(--gradient-neural-primary);
    --sidebar-text: #f1f5f9;
    --sidebar-text-muted: #cbd5e1;
    --sidebar-shadow: 0 10px 25px -3px rgba(0, 0, 0, 0.1), 
                      0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Main Layout Container */
.app-container {
    display: flex;
    min-height: 100vh;
    background: var(--surface-1);
}

/* Sidebar Overlay for Mobile */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* Sidebar Container */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    backdrop-filter: blur(8px);
    border-right: 1px solid var(--sidebar-border);
    box-shadow: var(--sidebar-shadow);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 1000;
    transition: all var(--duration-normal) var(--ease-smooth);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* RTL Support for Arabic */
[dir="rtl"] .sidebar {
    left: auto;
    right: 0;
    border-right: none;
    border-left: 1px solid var(--sidebar-border);
}

[dir="rtl"] .main-content {
    margin-left: 0;
    margin-right: var(--sidebar-width);
}

[dir="rtl"] .sidebar.collapsed + .sidebar-overlay + .main-content {
    margin-left: 0;
    margin-right: var(--sidebar-collapsed-width);
}

[dir="rtl"] .sidebar-nav-link::before {
    left: auto;
    right: 0;
    border-radius: 2px 0 0 2px;
}

[dir="rtl"] .sidebar-badge {
    margin-left: 0;
    margin-right: auto;
}

[dir="rtl"] .sidebar.collapsed .sidebar-nav-text {
    transform: translateX(10px);
}

[dir="rtl"] .sidebar-toggle {
    left: auto;
    right: var(--space-md);
}

[dir="rtl"] .sidebar-toggle i {
    transform: rotate(180deg);
}

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

/* Mobile Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        z-index: 1001;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0 !important;
        width: 100% !important;
    }
    
    /* RTL Mobile */
    [dir="rtl"] .sidebar {
        transform: translateX(100%);
    }
    
    [dir="rtl"] .sidebar.show {
        transform: translateX(0);
    }
    
    [dir="rtl"] .main-content {
        margin-right: 0 !important;
    }
}

/* Sidebar Header */
.sidebar-header {
    padding: var(--space-2xl);
    border-bottom: 1px solid var(--sidebar-border);
    position: relative;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    color: white;
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar-brand-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-neural-primary);
    border-radius: var(--radius-2026-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    box-shadow: var(--shadow-neural-glow);
    transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar-brand:hover .sidebar-brand-icon {
    transform: rotate(5deg) scale(1.1);
    box-shadow: var(--shadow-neural-intense);
}

.sidebar-brand-text {
    transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar.collapsed .sidebar-brand-text {
    opacity: 0;
    transform: translateX(-10px);
}

/* Sidebar Toggle Button */
.sidebar-toggle {
    position: absolute;
    top: 50%;
    right: -15px;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    background: var(--gradient-neural-primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    box-shadow: var(--shadow-neural-glow);
    transition: all var(--duration-fast) var(--ease-smooth);
    z-index: 1001;
}

.sidebar-toggle:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--shadow-neural-intense);
}

.sidebar-toggle i {
    transition: transform var(--duration-fast) var(--ease-smooth);
}

.sidebar.collapsed .sidebar-toggle i {
    transform: rotate(180deg);
}

/* Sidebar Navigation */
.sidebar-nav {
    padding: var(--space-xl) 0;
}

.sidebar-nav-section {
    margin-bottom: var(--space-2xl);
}

.sidebar-nav-title {
    padding: 0 var(--space-2xl) var(--space-md) var(--space-2xl);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--sidebar-text-muted);
    transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar.collapsed .sidebar-nav-title {
    opacity: 0;
    transform: translateX(-10px);
}

.sidebar-nav-item {
    position: relative;
    margin: var(--space-xs) var(--space-lg);
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: var(--radius-2026-md);
    transition: all var(--duration-fast) var(--ease-smooth);
    position: relative;
    margin-bottom: var(--space-xs);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    font-weight: 500;
}

.sidebar-nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.1) 50%, 
        transparent 100%);
    transition: left var(--duration-slow) var(--ease-smooth);
}

.sidebar-nav-link:hover::before {
    left: 100%;
}

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

.sidebar-nav-link.active {
    background: var(--sidebar-item-active);
    color: white;
    box-shadow: var(--shadow-neural-glow);
}

.sidebar-nav-link.active::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: white;
    border-radius: 0 2px 2px 0;
}

.sidebar-nav-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar-nav-text {
    transition: all var(--duration-fast) var(--ease-smooth);
    white-space: nowrap;
}

.sidebar.collapsed .sidebar-nav-text {
    opacity: 0;
    transform: translateX(-10px);
}

/* Sidebar Badge */
.sidebar-badge {
    background: var(--gradient-neural-danger);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: var(--radius-2026-full);
    min-width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar.collapsed .sidebar-badge {
    opacity: 0;
    transform: scale(0.8);
}

/* Sidebar Footer */
.sidebar-footer {
    margin-top: auto;
    padding: var(--space-xl);
    border-top: 1px solid var(--sidebar-border);
    background: rgba(15, 23, 42, 0.8);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--sidebar-text);
    text-decoration: none;
    padding: var(--space-md);
    border-radius: var(--radius-2026-md);
    transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar-user:hover {
    background: var(--sidebar-item-hover);
    color: white;
}

.sidebar-user-avatar {
    width: 36px;
    height: 36px;
    background: var(--gradient-neural-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
}

.sidebar-user-info {
    flex: 1;
    min-width: 0;
    transition: all var(--duration-fast) var(--ease-smooth);
}

.sidebar.collapsed .sidebar-user-info {
    opacity: 0;
    transform: translateX(-10px);
}

.sidebar-user-name {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    font-size: 0.75rem;
    color: var(--sidebar-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: all var(--duration-normal) var(--ease-smooth);
    min-height: 100vh;
    background: var(--surface-1);
    width: calc(100% - var(--sidebar-width));
}

.sidebar.collapsed + .sidebar-overlay + .main-content {
    margin-left: var(--sidebar-collapsed-width);
    width: calc(100% - var(--sidebar-collapsed-width));
}

/* Top Bar for Main Content */
.main-header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--border-primary);
    padding: var(--space-lg) var(--space-2xl);
    position: sticky;
    top: 0;
    z-index: 100;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    box-shadow: var(--shadow-xs);
}

.main-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.main-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 0;
}

.main-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Content Container */
.content-container {
    padding: var(--space-2xl);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all var(--duration-fast) var(--ease-smooth);
    }
    
    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        max-width: 320px;
    }
    
    .main-header {
        padding: var(--space-lg);
    }
    
    .content-container {
        padding: var(--space-lg);
    }
}

/* Tooltip for Collapsed Sidebar */
.sidebar-tooltip {
    position: absolute;
    left: calc(100% + 10px);
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-2026-sm);
    font-size: 0.875rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-fast) var(--ease-smooth);
    z-index: 1002;
}

.sidebar.collapsed .sidebar-nav-item:hover .sidebar-tooltip {
    opacity: 1;
    visibility: visible;
}

/* Scrollbar Styling */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.3);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.5);
}

/* Dark Mode Adaptations */
@media (prefers-color-scheme: dark) {
    :root {
        --sidebar-bg: linear-gradient(180deg, 
            rgba(0, 0, 0, 0.98) 0%, 
            rgba(15, 23, 42, 0.98) 100%);
    }
    
    .main-header {
        background: rgba(15, 23, 42, 0.95);
        border-bottom-color: rgba(71, 85, 105, 0.3);
    }
    
    .main-title {
        color: #f8fafc;
    }
}

/* Animation Classes */
.sidebar-slide-in {
    animation: slideInLeft var(--duration-normal) var(--ease-smooth);
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

/* Focus States */
.sidebar-nav-link:focus-visible {
    outline: 2px solid var(--neural-primary);
    outline-offset: 2px;
}

.sidebar-toggle:focus-visible {
    outline: 2px solid white;
    outline-offset: 2px;
}