/* Mobile-First Responsive Design for Maths Vault */

/* Base Mobile Styles */
* {
    box-sizing: border-box;
}

/* Mobile Navigation Overhaul */
.mobile-nav-toggle {
    display: none;
    position: fixed;
    top: 15px;
    right: 15px;
    z-index: 99999;
    background: var(--primary);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
    pointer-events: all;
}

.mobile-nav-toggle:hover {
    background: var(--secondary);
    transform: scale(1.05);
}

.mobile-nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: white;
    margin: 5px auto;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.mobile-nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.8);
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
}

.mobile-nav-overlay.active {
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: all !important;
    display: block !important;
}

.mobile-nav-menu {
    position: fixed !important;
    top: 0 !important;
    right: -100% !important;
    width: 85% !important;
    max-width: 350px !important;
    height: 100vh !important;
    background: #1D1D1B !important;
    z-index: 9999 !important;
    transition: right 0.3s ease-in-out, visibility 0.3s ease !important;
    overflow-y: auto !important;
    padding-top: 80px !important;
    box-shadow: -4px 0 12px rgba(0,0,0,0.5) !important;
    visibility: hidden !important;
}

.mobile-nav-menu.active {
    right: 0 !important;
    visibility: visible !important;
    display: block !important;
}

.mobile-nav-menu .nav-item {
    display: block;
    padding: 15px 20px;
    color: white !important;
    text-decoration: none;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s ease;
    font-size: 1.1rem;
    font-weight: 500;
}

/* Ensure all mobile menu text is white */
.mobile-nav-menu,
.mobile-nav-menu *,
.mobile-nav-submenu,
.mobile-nav-submenu * {
    color: white !important;
}

.mobile-nav-menu .nav-item:hover {
    background: var(--primary);
    padding-left: 30px;
}

.mobile-nav-menu .nav-item i {
    margin-right: 15px;
    width: 20px;
    text-align: center;
    color: var(--primary) !important;
}

/* Top-level mobile menu icons use school's primary color */
.mobile-nav-menu > ul > li > a i,
.mobile-nav-menu > ul > li > a .fa,
.mobile-nav-menu > ul > li > a .fas,
.mobile-nav-menu > ul > li > a .far,
.mobile-nav-menu > ul > li > a .fab,
.mobile-nav-menu > ul > li > a .fa-duotone {
    color: var(--primary) !important;
}

/* Dropdown/submenu icons use school's secondary color */
.mobile-nav-submenu i,
.mobile-nav-submenu .fa,
.mobile-nav-submenu .fas,
.mobile-nav-submenu .far,
.mobile-nav-submenu .fab,
.mobile-nav-submenu .fa-duotone {
    color: var(--secondary) !important;
}

/* Section title icons use primary color */
.mobile-nav-section-title i {
    color: var(--primary) !important;
}

/* Mobile Menu Sections */
.mobile-nav-section {
    border-bottom: 2px solid var(--primary);
    margin-bottom: 20px;
}

.mobile-nav-section-title {
    padding: 20px;
    background: var(--primary);
    color: white !important;
    font-weight: bold;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Section title text should be white on primary background */
.mobile-nav-section-title,
.mobile-nav-section-title * {
    color: white !important;
}

.mobile-nav-submenu {
    background: rgba(255,255,255,0.05);
}

.mobile-nav-submenu .nav-item {
    padding-left: 40px;
    font-size: 1rem;
    color: rgba(255,255,255,0.9);
}

/* Hide desktop menu on mobile */
@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: block !important;
    }
    
    .menu__dividers,
    .main-nav {
        display: none !important;
    }
    
    /* Add top padding to body when mobile nav is open */
    body.mobile-nav-open {
        overflow: hidden;
    }
}

/* Mobile Hero Optimization */
@media (max-width: 768px) {
    .hero {
        padding: 2rem 1rem !important;
        min-height: 60vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
    }
    
    .hero-content {
        width: 100% !important;
        max-width: none !important;
        padding: 0 1rem !important;
    }
    
    .hero h1.bebas-neue {
        font-size: 2.5rem !important;
        line-height: 1.2 !important;
        margin-bottom: 1rem !important;
        text-align: center !important;
    }
    
    .hero-subtitle {
        font-size: 1.4rem !important;
        margin-bottom: 2rem !important;
        text-align: center !important;
    }
    
    .department-bg {
        font-size: 0.7rem !important;
        letter-spacing: 0.2rem !important;
        opacity: 0.15 !important;
    }
    
    .hero-logo {
        height: 80% !important;
        opacity: 0.2 !important;
    }
}

@media (max-width: 480px) {
    .hero h1.bebas-neue {
        font-size: 2rem !important;
        letter-spacing: 0.1rem !important;
    }
    
    .hero-subtitle {
        font-size: 1.2rem !important;
    }
    
    .department-bg {
        font-size: 0.6rem !important;
        letter-spacing: 0.15rem !important;
    }
}

/* Mobile Dashboard Improvements */
@media (max-width: 768px) {
    .dashboard-container {
        padding: 1rem 0.5rem 6rem 0.5rem !important;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
        margin-bottom: 2rem !important;
    }
    
    .dashboard-title {
        font-size: 1.8rem !important;
        text-align: center !important;
        margin-bottom: 1.5rem !important;
    }
    
    .card {
        margin-bottom: 1rem !important;
        border-radius: 12px !important;
        box-shadow: 0 4px 12px rgba(0,0,0,0.15) !important;
    }
    
    .card-header {
        padding: 1.2rem !important;
        border-radius: 12px 12px 0 0 !important;
    }
    
    .card-body {
        padding: 1.2rem !important;
    }
    
    .resource-item {
        flex-direction: column !important;
        align-items: stretch !important;
        padding: 1rem !important;
        margin-bottom: 1rem !important;
        border-radius: 8px !important;
        background: rgba(255,255,255,0.05) !important;
    }
    
    .resource-actions {
        margin-left: 0 !important;
        margin-top: 1rem !important;
        justify-content: center !important;
        gap: 0.5rem !important;
    }
    
    .btn {
        padding: 12px 20px !important;
        font-size: 1rem !important;
        border-radius: 8px !important;
        min-height: 44px !important; /* Touch-friendly */
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 8px !important;
    }
    
    .stats-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }
    
    .stat-card {
        text-align: center !important;
        padding: 1.5rem !important;
    }
}

/* Mobile Forms */
@media (max-width: 768px) {
    .form-group {
        margin-bottom: 1.5rem !important;
    }
    
    .form-control,
    .form-select,
    input[type="text"],
    input[type="email"],
    input[type="password"],
    textarea {
        width: 100% !important;
        padding: 12px 16px !important;
        font-size: 16px !important; /* Prevents zoom on iOS */
        border-radius: 8px !important;
        border: 2px solid #ddd !important;
        min-height: 44px !important;
    }
    
    .form-control:focus,
    .form-select:focus,
    input:focus,
    textarea:focus {
        border-color: var(--primary) !important;
        outline: none !important;
        box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1) !important;
    }
    
    .form-label {
        font-size: 1rem !important;
        font-weight: 600 !important;
        margin-bottom: 0.5rem !important;
        display: block !important;
    }
    
    .form-row {
        flex-direction: column !important;
        gap: 1rem !important;
    }
    
    .form-row .form-group {
        margin-bottom: 0 !important;
    }
}

/* Mobile Tables */
@media (max-width: 768px) {
    .table-responsive {
        border-radius: 8px !important;
        overflow: hidden !important;
        box-shadow: 0 2px 8px rgba(0,0,0,0.1) !important;
    }
    
    .table {
        font-size: 0.9rem !important;
    }
    
    .table th,
    .table td {
        padding: 12px 8px !important;
        vertical-align: middle !important;
    }
    
    .table th {
        background: var(--primary) !important;
        color: white !important;
        font-weight: 600 !important;
        font-size: 0.85rem !important;
        text-transform: uppercase !important;
        letter-spacing: 0.5px !important;
    }
    
    /* Stack table content vertically on very small screens */
    @media (max-width: 480px) {
        .table,
        .table thead,
        .table tbody,
        .table th,
        .table td,
        .table tr {
            display: block !important;
        }
        
        .table thead tr {
            position: absolute !important;
            top: -9999px !important;
            left: -9999px !important;
        }
        
        .table tr {
            border: 1px solid #ccc !important;
            margin-bottom: 10px !important;
            padding: 10px !important;
            border-radius: 8px !important;
            background: white !important;
        }
        
        .table td {
            border: none !important;
            position: relative !important;
            padding-left: 50% !important;
            text-align: left !important;
        }
        
        .table td:before {
            content: attr(data-label) !important;
            position: absolute !important;
            left: 6px !important;
            width: 45% !important;
            padding-right: 10px !important;
            white-space: nowrap !important;
            font-weight: bold !important;
            color: var(--primary) !important;
        }
    }
}

/* Mobile Modals */
@media (max-width: 768px) {
    .modal-dialog {
        margin: 10px !important;
        max-width: calc(100% - 20px) !important;
    }
    
    .modal-content {
        border-radius: 12px !important;
        border: none !important;
        box-shadow: 0 10px 30px rgba(0,0,0,0.3) !important;
    }
    
    .modal-header {
        padding: 1.5rem 1.5rem 1rem 1.5rem !important;
        border-bottom: 1px solid #eee !important;
    }
    
    .modal-body {
        padding: 1rem 1.5rem 1.5rem 1.5rem !important;
    }
    
    .modal-footer {
        padding: 1rem 1.5rem 1.5rem 1.5rem !important;
        flex-direction: column !important;
        gap: 0.5rem !important;
    }
    
    .modal-footer .btn {
        width: 100% !important;
        margin: 0 !important;
    }
}

/* Mobile PDF Viewer */
@media (max-width: 768px) {
    .pdf-viewer {
        height: 70vh !important;
        border-radius: 8px !important;
        overflow: hidden !important;
    }
    
    .pdf-viewer iframe {
        width: 100% !important;
        height: 100% !important;
        border: none !important;
    }
    
    .pdf-controls {
        position: fixed !important;
        bottom: 80px !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
        background: var(--dark) !important;
        padding: 1rem !important;
        border-radius: 25px !important;
        box-shadow: 0 4px 12px rgba(0,0,0,0.3) !important;
        z-index: 1000 !important;
    }
    
    .pdf-controls .btn {
        margin: 0 0.25rem !important;
        padding: 10px 15px !important;
        border-radius: 20px !important;
    }
}

/* Mobile App Cards */
@media (max-width: 768px) {
    .app-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
        padding: 0 1rem !important;
    }
    
    .app-card {
        padding: 1.5rem !important;
        border-radius: 12px !important;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1) !important;
        transition: all 0.3s ease !important;
    }
    
    .app-card:hover {
        transform: translateY(-2px) !important;
        box-shadow: 0 6px 20px rgba(0,0,0,0.15) !important;
    }
    
    .app-card h3 {
        font-size: 1.3rem !important;
        margin-bottom: 1rem !important;
    }
    
    .app-card p {
        font-size: 1rem !important;
        line-height: 1.5 !important;
        margin-bottom: 1.5rem !important;
    }
    
    .app-card .btn {
        width: 100% !important;
        justify-content: center !important;
    }
}

/* Mobile Touch Improvements */
@media (max-width: 768px) {
    /* Ensure all interactive elements are touch-friendly */
    a, button, input, select, textarea, .btn {
        min-height: 44px !important;
        min-width: 44px !important;
    }
    
    /* Improve touch targets */
    .nav-item,
    .dropdown-toggle,
    .icon-btn {
        padding: 12px 16px !important;
        margin: 4px 0 !important;
    }
    
    /* Add visual feedback for touches */
    .btn:active,
    .nav-item:active,
    button:active {
        transform: scale(0.98) !important;
        transition: transform 0.1s ease !important;
    }
}

/* Mobile Loading States */
@media (max-width: 768px) {
    .loading {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 2rem !important;
    }
    
    .loading-spinner {
        width: 40px !important;
        height: 40px !important;
        border: 4px solid #f3f3f3 !important;
        border-top: 4px solid var(--primary) !important;
        border-radius: 50% !important;
        animation: spin 1s linear infinite !important;
        margin-bottom: 1rem !important;
    }
    
    @keyframes spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }
}

/* Mobile Typography */
@media (max-width: 768px) {
    body {
        font-size: 16px !important;
        line-height: 1.6 !important;
    }
    
    h1 {
        font-size: 2rem !important;
        line-height: 1.3 !important;
    }
    
    h2 {
        font-size: 1.6rem !important;
        line-height: 1.4 !important;
    }
    
    h3 {
        font-size: 1.4rem !important;
        line-height: 1.4 !important;
    }
    
    h4 {
        font-size: 1.2rem !important;
        line-height: 1.5 !important;
    }
    
    p {
        margin-bottom: 1rem !important;
    }
}

/* Mobile Utilities */
@media (max-width: 768px) {
    .mobile-hidden {
        display: none !important;
    }
    
    .mobile-only {
        display: block !important;
    }
    
    .desktop-only {
        display: none !important;
    }
    
    .text-center-mobile {
        text-align: center !important;
    }
    
    .full-width-mobile {
        width: 100% !important;
    }
}

/* Mobile Animations */
@media (max-width: 768px) {
    .fade-in {
        animation: fadeIn 0.5s ease-in !important;
    }
    
    .slide-up {
        animation: slideUp 0.5s ease-out !important;
    }
    
    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }
    
    @keyframes slideUp {
        from { 
            opacity: 0;
            transform: translateY(20px);
        }
        to { 
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* Mobile Dark Mode Support */
@media (max-width: 768px) {
    @media (prefers-color-scheme: dark) {
        .card {
            background: rgba(255,255,255,0.05) !important;
            border: 1px solid rgba(255,255,255,0.1) !important;
        }
        
        .table {
            background: rgba(255,255,255,0.05) !important;
        }
        
        .form-control,
        input,
        textarea,
        select {
            background: rgba(255,255,255,0.1) !important;
            border-color: rgba(255,255,255,0.2) !important;
            color: white !important;
        }
    }
}