/* Responsive Sidebar Styles */

/* Mobile-first approach */
.sidebar {
    position: fixed;
    top: 0;
    left: -300px; /* Hidden by default on mobile */
    width: 300px;
    height: 100vh;
    background: #fff;
    border-right: 1px solid #e1e5e9;
    z-index: 1000;
    transition: left 0.3s ease;
    overflow-y: auto;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

/* Show sidebar when active */
.sidebar.active {
    left: 0;
}

/* Mobile menu toggle button */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    background: #007acc;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.mobile-menu-toggle:hover {
    background: #005a9e;
    transform: scale(1.05);
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

/* Overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* Navigation styles */
.nav__list {
    padding: 20px;
}

.nav__title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #333;
    border-bottom: 2px solid #007acc;
    padding-bottom: 10px;
}

.nav__items {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav__item {
    margin-bottom: 8px;
}

.nav__item > a {
    display: block;
    padding: 12px 16px;
    color: #333;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-weight: 500;
}

.nav__item > a:hover {
    background: #f8f9fa;
    color: #007acc;
    transform: translateX(4px);
}

.nav__sub-items {
    list-style: none;
    padding: 0;
    margin: 8px 0 0 20px;
    border-left: 2px solid #e1e5e9;
}

.nav__sub-item {
    margin-bottom: 4px;
}

.nav__sub-item > a {
    display: block;
    padding: 8px 12px;
    color: #666;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.2s ease;
    font-size: 14px;
}

.nav__sub-item > a:hover {
    background: #f0f0f0;
    color: #007acc;
    transform: translateX(4px);
}

/* Main content adjustments */
#main {
    transition: margin-left 0.3s ease;
}

/* Tablet styles */
@media (min-width: 768px) {
    .sidebar {
        position: relative;
        left: 0;
        width: 250px;
        height: auto;
        box-shadow: none;
        border-right: 1px solid #e1e5e9;
    }
    
    .mobile-menu-toggle {
        display: none;
    }
    
    .sidebar-overlay {
        display: none !important;
    }
    
    #main {
        margin-left: 0;
    }
}

/* Desktop styles */
@media (min-width: 1024px) {
    .sidebar {
        width: 280px;
    }
    
    .nav__title {
        font-size: 20px;
    }
    
    .nav__item > a {
        padding: 14px 18px;
        font-size: 16px;
    }
    
    .nav__sub-item > a {
        padding: 10px 14px;
        font-size: 15px;
    }
}

/* Large desktop styles */
@media (min-width: 1200px) {
    .sidebar {
        width: 320px;
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    .sidebar,
    .mobile-menu-toggle,
    .sidebar-overlay,
    .nav__item > a,
    .nav__sub-item > a {
        transition: none;
    }
}

/* Focus styles for keyboard navigation */
.nav__item > a:focus,
.nav__sub-item > a:focus,
.mobile-menu-toggle:focus {
    outline: 2px solid #007acc;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .sidebar {
        border-right: 2px solid #000;
    }
    
    .nav__item > a,
    .nav__sub-item > a {
        border: 1px solid transparent;
    }
    
    .nav__item > a:hover,
    .nav__sub-item > a:hover {
        border-color: #000;
    }
}