/* NORSU Alumni System - Sidebar Styles */

/* Sidebar Base Styles */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 250px;
    background: var(--primary-color);
    color: var(--text-light);
    padding: 1rem;
    z-index: 1040;
    transition: var(--transition-normal);
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

/* Sidebar Header */
.sidebar-header {
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 1rem;
}

.sidebar-header img {
    height: 40px;
    width: auto;
    border-radius: var(--border-radius-sm);
}

.sidebar-header h5 {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--letter-spacing-tight);
}

/* Sidebar Navigation */
.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav .nav-item {
    margin: 0.5rem 0;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    padding: 0.6rem 1rem;
    margin-bottom: 4px;
    color: var(--text-light);
    text-decoration: none;
    border-radius: var(--border-radius-md);
    transition: var(--transition-normal);
    gap: 0.8rem;
    font-weight: var(--font-weight-medium);
    font-size: 0.8rem;
    position: relative;
    overflow: hidden;
}

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

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

.sidebar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
    color: var(--text-light);
}

.sidebar-nav .nav-link.active {
    background: rgba(255, 255, 255, 0.08);
    position: relative;
    box-shadow: none;
    border-left: 2px solid rgba(255, 255, 255, 0.6);
}

.sidebar-nav .nav-link i {
    width: 18px;
    text-align: center;
    font-size: 1rem;
    transition: var(--transition-normal);
}

.sidebar-nav .nav-link:hover i {
    transform: scale(1.1);
}

.sidebar-nav .nav-link span {
    font-size: var(--font-size-xs, 0.75rem);
    letter-spacing: var(--letter-spacing-normal);
}

/* Sidebar Toggle Button (Mobile) */
.sidebar-toggle {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1050;
    background: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: var(--border-radius-md);
    padding: 0.75rem;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    display: none;
}

.sidebar-toggle:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.sidebar-toggle:focus {
    outline: 2px solid var(--text-light);
    outline-offset: 2px;
}

/* Mobile Sidebar Behavior */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        width: 280px;
        max-width: 85vw;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .sidebar-toggle {
        display: block;
    }
    
    /* Overlay for mobile sidebar */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1035;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
    }
    
    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }
    
    /* Ensure main content is not affected by sidebar on mobile */
    body {
        overflow-x: hidden;
    }
    
    /* Adjust sidebar navigation for mobile */
    .sidebar-nav .nav-link {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .sidebar-nav .nav-link i {
        font-size: 1.1rem;
        width: 24px;
    }
    
    .sidebar-nav .nav-link span {
        font-size: 0.85rem;
    }
    
    /* Improve touch targets on mobile */
    .sidebar-category {
        padding: 0.75rem 1rem;
        font-size: 0.7rem;
        min-height: 44px;
        display: flex;
        align-items: center;
    }
    
    /* Better spacing for mobile */
    .nav-group {
        padding-left: 0.5rem;
        margin-left: 0.5rem;
    }
    
    .sidebar-header {
        padding: 1.25rem 1rem;
    }
    
    .sidebar-header h5 {
        font-size: 1.1rem;
    }
}

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

.sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-sm);
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* Sidebar Categories for collapsible groups */
.sidebar-category {
    margin: 1rem 0 0.25rem 0;
    padding: 0.4rem 1rem;
    font-size: 0.65rem;
    font-weight: var(--font-weight-semibold, 600);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide, 1px);
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    cursor: pointer;
    transition: all 0.2s ease;
    border-radius: var(--border-radius-sm, 4px);
    background-color: rgba(0, 0, 0, 0.1);
    border-left: 3px solid transparent;
    user-select: none; /* Prevent text selection when clicking */
}

.sidebar-category:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-left-color: rgba(255, 255, 255, 0.5);
}

.sidebar-category.active {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.15);
    border-left-color: #fff;
}

.toggle-icon {
    font-size: 0.7rem;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    margin-left: 5px; /* Add space between text and icon */
    padding: 2px; /* Make icon easier to hit */
}

.sidebar-category[aria-expanded="true"] .toggle-icon {
    transform: rotate(180deg);
}

.sidebar-category[aria-expanded="false"] .toggle-icon {
    transform: rotate(0deg);
}

/* Navigation group (collapsible) */
.nav-group {
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding-left: 1rem;
    opacity: 1;
    visibility: visible;
    max-height: none; /* Always visible by default */
}

.nav-group.collapse:not(.show) {
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    padding-top: 0;
    padding-bottom: 0;
    margin-top: 0;
    margin-bottom: 0;
}

.nav-group.collapse.show {
    max-height: 1000px; /* Large enough to accommodate content */
    opacity: 1;
    visibility: visible;
    padding-top: inherit;
    padding-bottom: inherit;
    margin-top: inherit;
    margin-bottom: inherit;
}

/* Add subtle border to left side of nav groups */
.nav-group {
    border-left: 2px solid rgba(255, 255, 255, 0.15);
    margin-left: 1rem;
    background: linear-gradient(to right, rgba(255, 255, 255, 0.02), transparent);
    border-radius: 0 var(--border-radius-sm, 4px) var(--border-radius-sm, 4px) 0;
}

.nav-group.show {
    border-left-color: rgba(255, 255, 255, 0.3);
    background: linear-gradient(to right, rgba(255, 255, 255, 0.05), transparent);
}

/* Space between groups */
.nav-item:not(:last-child) {
    margin-bottom: 0.5rem;
}

/* Make entire category header clickable */
.sidebar-category {
    -webkit-tap-highlight-color: transparent; /* Remove tap highlight on mobile */
}

/* Accessibility */
.sidebar-category:focus {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: -2px;
}

/* Sidebar Footer */
.sidebar-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
}

.sidebar-footer .nav-link {
    justify-content: center;
    margin: 0.25rem 0;
    font-size: var(--font-size-sm);
}

/* Accessibility Improvements */
.sidebar-nav .nav-link:focus {
    outline: 2px solid rgba(255, 255, 255, 0.8);
    outline-offset: 2px;
}

/* Keyboard Navigation */
.sidebar-nav .nav-link:focus-visible {
    background: rgba(255, 255, 255, 0.2);
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .sidebar {
        background: var(--primary-dark);
        border-right: 2px solid var(--text-light);
    }
    
    .sidebar-nav .nav-link {
        border: 1px solid transparent;
    }
    
    .sidebar-nav .nav-link:hover,
    .sidebar-nav .nav-link.active {
        border-color: var(--text-light);
        background: rgba(255, 255, 255, 0.2);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .sidebar,
    .sidebar-nav .nav-link,
    .sidebar-toggle,
    .sidebar-overlay {
        transition: none;
    }
    
    .sidebar-nav .nav-link:hover {
        transform: none;
    }
    
    .sidebar-nav .nav-link::before {
        display: none;
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .sidebar-toggle {
        display: none;
    }
}