/* EduQuiz Platform - Responsive Stylesheet */

/* Tablet Styles (768px and below) */
@media (max-width: 768px) {
    /* Navigation */
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        padding: var(--spacing-lg);
        gap: 0;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
        width: 100%;
    }
    
    .nav-item {
        width: 100%;
    }
    
    .nav-link {
        width: 100%;
        padding: var(--spacing-lg);
        border-bottom: 1px solid var(--gray);
        border-radius: 0;
        justify-content: flex-start;
    }
    
    .user-profile {
        margin-top: var(--spacing-lg);
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: var(--spacing-lg);
        border-radius: var(--border-radius);
        background-color: var(--light-gray);
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
    
    /* Hero Section */
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-actions {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-actions .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    /* Action Cards */
    .action-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Statistics */
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .stat-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    /* Forms */
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    /* Modal */
    .modal-content {
        width: 95%;
        margin: var(--spacing-md);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

/* Mobile Styles (480px and below) */
@media (max-width: 480px) {
    /* Base adjustments */
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Typography */
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
    
    /* Spacing */
    .hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .page-header {
        padding: var(--spacing-xl) 0;
    }
    
    .quick-actions,
    .stats-section {
        padding: var(--spacing-xl) 0;
    }
    
    /* Action Cards */
    .action-card {
        padding: var(--spacing-lg);
    }
    
    .action-icon {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-xl);
    }
    
    /* Statistics */
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        padding: var(--spacing-lg);
    }
    
    /* Buttons */
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-actions .btn {
        max-width: none;
    }
    
    /* Modal */
    .modal-content {
        width: 98%;
        margin: var(--spacing-sm);
        max-height: 95vh;
    }
    
    .modal-header {
        padding: var(--spacing-md);
    }
    
    .modal-body {
        padding: var(--spacing-md);
    }
}

/* Large Desktop Styles (1200px and above) */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
        padding: 0 var(--spacing-xl);
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .action-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Quiz-specific Responsive Styles */
@media (max-width: 768px) {
    /* Quiz Filters */
    .quiz-filters .filter-bar {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .filter-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group label {
        margin-bottom: var(--spacing-sm);
    }
    
    /* Quiz Grid */
    .quiz-grid {
        grid-template-columns: 1fr;
    }
    
    /* Category Grid */
    .category-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
    
    .category-card {
        padding: var(--spacing-md);
    }
    
    /* Today's Quiz Highlight */
    .quiz-highlight {
        flex-direction: column;
        text-align: center;
    }
    
    .quiz-stats {
        justify-content: center;
        flex-wrap: wrap;
    }
}

/* Leaderboard Responsive Styles */
@media (max-width: 768px) {
    /* Top Winners Podium */
    .podium {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }
    
    .winner-card {
        width: 100%;
        max-width: 300px;
    }
    
    /* User Rank Card */
    .user-rank-card {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .user-stats {
        justify-content: center;
        gap: var(--spacing-lg);
    }
    
    /* Leaderboard Table */
    .leaderboard-table-container {
        overflow-x: auto;
    }
    
    .leaderboard-table {
        min-width: 600px;
    }
    
    /* Filter Tabs */
    .filter-tabs {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .filter-tab {
        flex: 1;
        min-width: 120px;
    }
    
    /* Analytics Grid */
    .analytics-grid {
        grid-template-columns: 1fr;
    }
    
    .chart-container {
        height: 250px !important;
    }
}

/* Resources Page Responsive Styles */
@media (max-width: 768px) {
    /* Resource Filters */
    .resource-filters .filter-bar {
        flex-direction: column;
    }
    
    /* Featured Resources */
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    /* Subject Sections */
    .subject-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    /* Resource Cards */
    .resource-card {
        flex-direction: column;
        text-align: center;
    }
    
    .resource-image {
        width: 100%;
        margin-bottom: var(--spacing-md);
    }
}

/* Announcements Responsive Styles */
@media (max-width: 768px) {
    /* Announcement Filters */
    .announcement-filters .filter-bar {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    /* Announcement Items */
    .announcement-item {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .announcement-date {
        align-self: flex-start;
        min-width: auto;
    }
    
    /* Important Notice */
    .notice-banner {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    /* Announcement Header */
    .announcements-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }
    
    .announcement-controls {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* Contact Page Responsive Styles */
@media (max-width: 768px) {
    /* Contact Cards */
    .contact-cards {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Contact Form Layout */
    .contact-content {
        flex-direction: column;
    }
    
    .contact-sidebar {
        margin-top: var(--spacing-xl);
    }
    
    /* Location Map */
    .location-details {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}

/* Login Page Responsive Styles */
@media (max-width: 768px) {
    /* Login Container */
    .login-container {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .login-card,
    .register-card {
        width: 100%;
    }
    
    .features-sidebar {
        order: -1;
    }
    
    /* Feature Items */
    .feature-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
}

/* Print Responsive Adjustments */
@media print {
    .container {
        max-width: none;
        padding: 0;
    }
    
    .hero,
    .page-header {
        background: white !important;
        color: black !important;
        padding: var(--spacing-md) 0;
    }
    
    .action-grid,
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* High DPI Display Adjustments */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 2dppx) {
    /* Sharper borders and shadows for high DPI displays */
    .btn,
    .modal-content,
    .action-card,
    .announcement-item {
        border: 0.5px solid rgba(0, 0, 0, 0.1);
    }
}

/* Reduced Motion Preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hero-icon,
    .action-card,
    .stat-item {
        transform: none !important;
    }
}

/* Dark Mode Support (for future implementation) */
@media (prefers-color-scheme: dark) {
    :root {
        --white: #1a1a1a;
        --light-gray: #2d2d2d;
        --gray: #404040;
        --dark-gray: #b0b0b0;
        --dark: #e0e0e0;
        --black: #ffffff;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    .btn {
        min-height: 44px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .nav-link {
        min-height: 44px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    /* Remove hover effects on touch devices */
    .action-card:hover,
    .stat-item:hover,
    .announcement-item:hover {
        transform: none;
        box-shadow: var(--shadow);
    }
}