/* GPJD Mobile Sidebar Styles */
.mobile-sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    width: 320px;
    height: 100vh;
    background: #091423;
    box-shadow: var(--shadow-xl);
    transition: left 0.3s ease;
    z-index: 1001;
    overflow-y: auto;
    color: white;
    display: flex;
    flex-direction: column;
    border-right: 4px solid var(--highlight-color);
}

.mobile-sidebar.active {
    left: 0;
}

.sidebar-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.2);
}

.sidebar-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: white;
    margin: 0;
}

.sidebar-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: white;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background-color 0.3s ease;
}

.sidebar-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.sidebar-content {
    padding: var(--spacing-lg) 0;
    flex: 1;
}

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

.sidebar-nav li {
    margin: 0;
}

.sidebar-link {
    display: block;
    padding: var(--spacing-md) var(--spacing-xl);
    color: #ffffff;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    font-size: 16px;
    position: relative;
    cursor: pointer;
    letter-spacing: 0.5px;
}

.sidebar-link:hover {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0.08) 100%);
    color: #ffffff;
    padding-left: calc(var(--spacing-xl) + var(--spacing-sm));
    border-left: 3px solid #ffffff;
    font-weight: 700;
}

.sidebar-dropdown .sidebar-link::after {
    content: '▼';
    position: absolute;
    right: var(--spacing-xl);
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    transition: transform 0.3s ease;
    color: rgba(255, 255, 255, 0.8);
    font-weight: bold;
}

.sidebar-dropdown.active .sidebar-link::after {
    transform: translateY(-50%) rotate(180deg);
    color: #ffffff;
    font-weight: bold;
}

.sidebar-submenu {
    display: none;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.1) 100%);
    list-style: none;
    margin: 0;
    padding: 0;
    border-left: 3px solid var(--highlight-color);
    backdrop-filter: blur(10px);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.sidebar-dropdown.active .sidebar-submenu {
    display: block;
    max-height: 500px;
}

.sidebar-submenu.active {
    display: block;
    max-height: 500px;
}

.sidebar-sublink {
    display: block;
    padding: var(--spacing-sm) calc(var(--spacing-xl) + var(--spacing-lg));
    color: #e0e0e0;
    text-decoration: none;
    font-size: 15px;
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    cursor: pointer;
    letter-spacing: 0.3px;
}

.sidebar-sublink:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    padding-left: calc(var(--spacing-xl) + var(--spacing-lg) + var(--spacing-sm));
    font-weight: 600;
}

.sidebar-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    background: rgba(0, 0, 0, 0.2);
    margin-top: auto;
}

.sidebar-footer .btn {
    width: 100%;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    border-radius: var(--radius-lg);
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

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

/* Body scroll lock when sidebar is open */
body.sidebar-open {
    overflow: hidden;
}

/* Animation classes */
.feature-card,
.publication-card,
.stat-item {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.feature-card.animate-in,
.publication-card.animate-in,
.stat-item.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* Loading spinner */
.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: var(--spacing-sm);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .mobile-sidebar {
        width: 300px;
    }
    
    .sidebar-header {
        padding: var(--spacing-lg);
    }
    
    .sidebar-link {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
    
    .sidebar-sublink {
        padding: var(--spacing-sm) calc(var(--spacing-lg) + var(--spacing-md));
        font-size: var(--font-size-sm);
    }
    
    .sidebar-footer {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .mobile-sidebar {
        width: 100%;
        max-width: 100vw;
    }
    
    .sidebar-header {
        padding: var(--spacing-md);
    }
    
    .sidebar-link {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .sidebar-sublink {
        padding: var(--spacing-xs) calc(var(--spacing-md) + var(--spacing-sm));
    }
    
    .sidebar-footer {
        padding: var(--spacing-md);
    }
}

@media (min-width: 992px) {
    .mobile-sidebar,
    .sidebar-overlay {
        display: none;
    }
}