/*
================================================================================
   NEW SIDEBAR DESIGN - MODERN & CLEAN
   ========================================================================== */

/* Modern Sidebar Container */
.modern-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 260px;
    height: 100vh;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    overflow-y: auto;
    overflow-x: hidden;
}

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

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

.modern-sidebar::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 3px;
}

.modern-sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

.modern-sidebar.collapsed {
    width: 70px;
}

/* Sidebar Header */
.sidebar-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    background: var(--bg-sidebar);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    transition: all 0.3s ease;
}

.brand-icon:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.brand-text h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 1rem;
}

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

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    overflow-y: auto;
}

/* Main Navigation Links */
.nav-link {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.875rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 10px;
    transition: all 0.2s ease;
    margin-bottom: 0.25rem;
    position: relative;
}

.nav-link i:first-child {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-muted);
    transition: all 0.2s ease;
}

.nav-link span {
    flex: 1;
}

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

.nav-link:hover i:first-child {
    color: var(--primary-color);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

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

/* Favorite Toggle Button */
.favorite-toggle {
    background: transparent;
    border: none;
    color: var(--text-muted);
    width: 24px;
    height: 24px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    padding: 0;
    margin-left: auto;
}

.favorite-toggle:hover {
    background: var(--gray-200);
    color: #fbbf24;
    transform: scale(1.1);
}

.favorite-toggle i.fas {
    color: #fbbf24;
}

.nav-link.active .favorite-toggle {
    color: rgba(255, 255, 255, 0.8);
}

.nav-link.active .favorite-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fbbf24;
}

.nav-link.active .favorite-toggle i.fas {
    color: #fbbf24;
}

/* Navigation Sections */
.nav-section {
    margin-bottom: 0.5rem;
}

.nav-section.active .nav-section-header {
    background: var(--primary-ultra-light);
    color: var(--primary-color);
}

.nav-section.active .nav-section-header i:first-child {
    color: var(--primary-color);
}

.nav-section-header {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.875rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.nav-section-header i:first-child {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-muted);
    transition: all 0.2s ease;
}

.nav-section-header span {
    flex: 1;
}

.section-arrow {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

.nav-section-header:hover {
    background: var(--gray-100);
}

.nav-section-header:hover i:first-child {
    color: var(--primary-color);
}

.nav-section-header[aria-expanded="true"] .section-arrow {
    transform: rotate(180deg);
}

.nav-section-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.nav-section-content.open {
    max-height: 500px;
}

.nav-section-content .nav-link {
    padding-left: 2.5rem;
    font-size: 0.875rem;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    width: 100%;
}

.footer-btn:hover {
    background: var(--gray-100);
    color: var(--text-primary);
    border-color: var(--gray-300);
}

.footer-btn i {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

/* Language Switcher */
.language-switcher {
    position: relative;
}

.language-btn {
    justify-content: space-between;
}

.language-dropdown {
    position: absolute;
    bottom: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
    z-index: 1000;
}

.language-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    border-bottom: 1px solid var(--border-color);
}

.language-option:last-child {
    border-bottom: none;
}

.language-option:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

.language-option.active {
    background: var(--primary-ultra-light);
    color: var(--primary-color);
    font-weight: 600;
}

.flag {
    font-size: 1rem;
}

/* Theme Switcher */
.theme-switcher {
    position: relative;
}

.theme-btn {
    justify-content: space-between;
}

.theme-dropdown {
    position: absolute;
    bottom: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
    z-index: 1000;
}

.theme-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
}

.theme-option:last-child {
    border-bottom: none;
}

.theme-option:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

.theme-option.active {
    background: var(--primary-ultra-light);
    color: var(--primary-color);
    font-weight: 600;
}

.theme-option i {
    width: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Dark Mode */
[data-theme="dark"] .sidebar-header {
    background: var(--bg-sidebar);
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .brand-text h1 {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="dark"] .nav-link {
    color: var(--text-secondary);
}

[data-theme="dark"] .nav-link:hover {
    background: rgba(99, 102, 241, 0.15);
}

[data-theme="dark"] .nav-link.active {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

[data-theme="dark"] .nav-section.active .nav-section-header {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
}

[data-theme="dark"] .nav-section.active .nav-section-header i:first-child {
    color: var(--primary-light);
}

[data-theme="dark"] .nav-section-header {
    color: var(--text-primary);
}

[data-theme="dark"] .nav-section-header:hover {
    background: var(--gray-200);
}

[data-theme="dark"] .footer-btn {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .footer-btn:hover {
    background: var(--gray-200);
    color: var(--text-primary);
}

[data-theme="dark"] .language-dropdown {
    background: var(--bg-card);
    border-color: var(--border-color);
}

[data-theme="dark"] .language-option {
    color: var(--text-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .language-option:hover {
    background: var(--gray-200);
    color: var(--text-primary);
}

[data-theme="dark"] .language-option.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-color);
}

[data-theme="dark"] .theme-dropdown {
    background: var(--bg-card);
    border-color: var(--border-color);
}

[data-theme="dark"] .theme-option {
    color: var(--text-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .theme-option:hover {
    background: var(--gray-200);
    color: var(--text-primary);
}

[data-theme="dark"] .theme-option.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-color);
}

/* Collapsed State */
.modern-sidebar.collapsed .brand-text,
.modern-sidebar.collapsed .nav-section-header span,
.modern-sidebar.collapsed .section-arrow,
.modern-sidebar.collapsed .footer-btn span,
.modern-sidebar.collapsed .favorite-toggle {
    display: none;
}

.modern-sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: 1.25rem 0;
}

.modern-sidebar.collapsed .sidebar-toggle-btn {
    position: absolute;
    top: 1.25rem;
    right: 0.75rem;
    background: var(--primary-ultra-light);
    color: var(--primary-color);
}

.modern-sidebar.collapsed .brand {
    justify-content: center;
}

.modern-sidebar.collapsed .nav-section-header {
    justify-content: center;
    padding: 0.875rem;
}

.modern-sidebar.collapsed .nav-section-header i:first-child {
    margin: 0;
}

.modern-sidebar.collapsed .nav-section-content {
    display: none;
}

.modern-sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 0.875rem;
}

.modern-sidebar.collapsed .nav-link span {
    display: none;
}

.modern-sidebar.collapsed .nav-link i {
    margin: 0;
}

.modern-sidebar.collapsed .sidebar-footer {
    align-items: center;
}

.modern-sidebar.collapsed .footer-btn {
    justify-content: center;
    padding: 0.75rem;
}

.modern-sidebar.collapsed .footer-btn span {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    .modern-sidebar {
        transform: translateX(-100%);
        position: fixed;
        z-index: 9999;
        height: 100vh;
        width: 280px;
        left: 0;
        top: 0;
    }

    .modern-sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-xl);
    }

    .modern-sidebar.collapsed {
        width: 280px;
        transform: translateX(-100%);
    }

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

    .modern-sidebar.collapsed .brand-text,
    .modern-sidebar.collapsed .sidebar-toggle-btn,
    .modern-sidebar.collapsed .nav-section-header span,
    .modern-sidebar.collapsed .section-arrow,
    .modern-sidebar.collapsed .footer-btn span {
        display: block;
    }

    .modern-sidebar.collapsed .nav-section-content {
        display: block;
    }

    .modern-sidebar.collapsed .nav-link span {
        display: block;
    }
    
    /* Sidebar overlay */
    .sidebar-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 9998;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    /* Mobile menu toggle */
    .mobile-menu-toggle {
        display: flex;
    }
    
    /* Adjust header for mobile */
    .modern-header {
        padding: 0 1rem;
    }
    
    .header-left {
        gap: 0.5rem;
    }
    
    .header-right {
        gap: 0.5rem;
    }
    
    /* Hide some elements on mobile */
    .modern-search {
        display: none;
    }
    
    .modern-user-info {
        display: none;
    }
    
    .favorites-list {
        display: none;
    }
}