/* =====================================================
   RESPONSIVE STYLES - Mobile & Tablet Adaptations
   ===================================================== */

/* Extra Large Screens (1400px+) */
@media (min-width: 1400px) {
    .slide-content {
        max-width: 1300px;
    }
    
    .slide-title {
        font-size: 3.5rem;
    }
    
    .slide--title .slide-title {
        font-size: 5rem;
    }
}

/* Large Screens (1200px - 1399px) */
@media (max-width: 1399px) {
    .slide-content {
        max-width: 1100px;
    }
}

/* Medium-Large Screens (992px - 1199px) */
@media (max-width: 1199px) {
    .slide {
        padding: var(--spacing-xl) var(--spacing-xl);
    }
    
    .slide-title {
        font-size: 2.5rem;
    }
    
    .slide--title .slide-title {
        font-size: 3.5rem;
    }
    
    .slide--title .slide-subtitle {
        font-size: 1.5rem;
    }
    
    .slide-columns {
        gap: var(--spacing-lg);
    }
    
    .slide-columns--3 {
        grid-template-columns: 1fr 1fr;
    }
    
    .icon-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .stat-grid {
        gap: var(--spacing-md);
    }
    
    .stat-value {
        font-size: 2rem;
    }
}

/* Medium Screens - Tablets (768px - 991px) */
@media (max-width: 991px) {
    html {
        font-size: 15px;
    }
    
    .slide {
        padding: var(--spacing-lg) var(--spacing-lg);
    }
    
    .slide-title {
        font-size: 2.25rem;
    }
    
    .slide--title .slide-title {
        font-size: 3rem;
    }
    
    .slide--title .slide-subtitle {
        font-size: 1.25rem;
    }
    
    .slide-subtitle {
        font-size: 1.25rem;
    }
    
    .slide-columns {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .slide-columns--3 {
        grid-template-columns: 1fr;
    }
    
    .comparison {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .comparison-vs {
        order: -1;
        margin: 0 auto;
    }
    
    .icon-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .region-cards {
        grid-template-columns: 1fr;
    }
    
    .stat-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .conclusion-points {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Charts */
    .chart-container {
        padding: var(--spacing-md);
    }
    
    .bar-chart {
        height: 250px;
    }
    
    .chart-bar {
        width: 40px;
    }
    
    .grouped-bar-chart .chart-bar {
        width: 20px;
    }
    
    .comparison-chart {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .comparison-chart-value {
        font-size: 3rem;
    }
    
    .pie-chart {
        flex-direction: column;
    }
    
    /* Navigation */
    .nav-logo .logo-text {
        display: none;
    }
    
    /* Footer */
    .presentation-footer .footer-center {
        display: none;
    }
}

/* Small Screens - Large Phones (576px - 767px) */
@media (max-width: 767px) {
    html {
        font-size: 14px;
    }
    
    .slide {
        padding: var(--spacing-md);
        min-height: calc(100vh - 100px);
    }
    
    .slide-title {
        font-size: 1.75rem;
    }
    
    .slide--title .slide-title {
        font-size: 2.5rem;
    }
    
    .slide--title .slide-subtitle {
        font-size: 1.125rem;
    }
    
    .slide-subtitle {
        font-size: 1.125rem;
    }
    
    .slide--section .section-number {
        font-size: 4rem;
    }
    
    .slide--section .slide-title {
        font-size: 2rem;
    }
    
    .slide--content .slide-body {
        font-size: 1rem;
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
    
    .card-title {
        font-size: 1.25rem;
    }
    
    .feature-box {
        padding: var(--spacing-sm);
    }
    
    .feature-icon {
        font-size: 1.5rem;
    }
    
    .quote {
        font-size: 1.125rem;
        padding: var(--spacing-md);
    }
    
    .highlight-box .highlight-value {
        font-size: 2.5rem;
    }
    
    .icon-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .icon-item .icon {
        font-size: 2.5rem;
    }
    
    .food-icons {
        font-size: 2rem;
        gap: var(--spacing-md);
        flex-wrap: wrap;
    }
    
    .country-flag {
        font-size: 3rem;
    }
    
    .country-name {
        font-size: 1.75rem;
    }
    
    .stat-value {
        font-size: 1.75rem;
    }
    
    .infographic-number {
        font-size: 3.5rem;
    }
    
    .infographic-number sup {
        font-size: 1.5rem;
    }
    
    /* Navigation */
    .main-nav {
        padding: 0 var(--spacing-md);
    }
    
    .nav-btn {
        width: 36px;
        height: 36px;
    }
    
    .slide-counter {
        font-size: 0.875rem;
        min-width: 50px;
    }
    
    /* Sidebar */
    .sidebar {
        width: 100%;
        right: -100%;
    }
    
    /* Charts */
    .bar-chart {
        height: 200px;
    }
    
    .chart-bar {
        width: 30px;
    }
    
    .bar-value {
        font-size: 0.65rem;
    }
    
    .bar-label {
        font-size: 0.65rem;
    }
    
    .data-table {
        font-size: 0.8rem;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--spacing-sm);
    }
    
    .kpi-value {
        font-size: 2rem;
    }
    
    /* Footer */
    .presentation-footer {
        height: 35px;
        font-size: 0.7rem;
    }
    
    .presentation-footer .footer-left,
    .presentation-footer .footer-right {
        display: none;
    }
    
    .presentation-footer .footer-center {
        display: block;
        width: 100%;
    }
}

/* Extra Small Screens - Small Phones (up to 575px) */
@media (max-width: 575px) {
    html {
        font-size: 13px;
    }
    
    .slide {
        padding: var(--spacing-sm);
    }
    
    .slide-title {
        font-size: 1.5rem;
    }
    
    .slide--title .slide-title {
        font-size: 2rem;
    }
    
    .slide--title .slide-subtitle {
        font-size: 1rem;
    }
    
    .slide--section .section-number {
        font-size: 3rem;
    }
    
    .slide--section .slide-title {
        font-size: 1.5rem;
    }
    
    .comparison-side {
        padding: var(--spacing-md);
    }
    
    .comparison-title {
        font-size: 1.25rem;
    }
    
    .comparison-flag {
        font-size: 1.5rem;
    }
    
    .timeline {
        padding-left: var(--spacing-lg);
    }
    
    .timeline::before {
        left: 5px;
    }
    
    .timeline-item::before {
        left: -22px;
        width: 10px;
        height: 10px;
    }
    
    .conclusion-number {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    /* Charts */
    .bar-chart {
        height: 150px;
    }
    
    .chart-bar {
        width: 20px;
    }
    
    .grouped-bar-chart .chart-bar {
        width: 12px;
    }
    
    .progress-circle {
        width: 80px;
        height: 80px;
    }
    
    .progress-circle-value {
        font-size: 1rem;
    }
    
    /* Hide some elements on very small screens */
    .decoration-circle {
        display: none;
    }
    
    .university-logo {
        width: 80px;
    }
}

/* Landscape Mode on Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .slide {
        min-height: auto;
        padding: var(--spacing-md);
    }
    
    .slide-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .slide-subtitle {
        font-size: 1rem;
    }
    
    .slide-header {
        margin-bottom: var(--spacing-md);
    }
    
    .main-nav {
        height: 50px;
    }
    
    .presentation-footer {
        height: 30px;
    }
    
    .progress-bar {
        bottom: 30px;
    }
    
    .slide-columns {
        grid-template-columns: 1fr 1fr;
    }
}

/* Print Styles */
@media print {
    .main-nav,
    .sidebar,
    .presentation-footer,
    .progress-bar,
    .loader {
        display: none !important;
    }
    
    .presentation {
        padding: 0;
    }
    
    .slide {
        display: block !important;
        page-break-after: always;
        min-height: auto;
        padding: 2cm;
    }
    
    .slide.active {
        display: block;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .slide--dark,
    .slide--gradient-primary,
    .slide--gradient-warm {
        background: white !important;
        color: black !important;
    }
    
    .card {
        background: white !important;
        border: 1px solid #ccc !important;
    }
    
    a {
        color: black !important;
        text-decoration: underline;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --bg-dark: #000000;
        --text-light: #FFFFFF;
        --accent-gold: #FFD700;
    }
    
    .card,
    .feature-box,
    .stat-item {
        border: 2px solid var(--text-light);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .slide.active .slide-title,
    .slide.active .slide-subtitle,
    .slide.active .slide-body,
    .slide.active .card,
    .slide.active .stat-item,
    .slide.active .feature-box,
    .slide.active .timeline-item,
    .slide.active .region-card,
    .slide.active .icon-item,
    .slide.active .styled-list li {
        animation: none !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .slide--light {
        background: var(--bg-dark);
        color: var(--text-light);
    }
    
    .card--light {
        background: rgba(255, 255, 255, 0.1);
        border-color: rgba(255, 255, 255, 0.2);
    }
    
    .chart-container--light {
        background: rgba(255, 255, 255, 0.1);
    }
}

/* Touch Device Optimizations */
@media (hover: none) {
    .nav-btn:hover,
    .menu-toggle:hover,
    .card:hover,
    .feature-box:hover,
    .region-card:hover {
        transform: none;
    }
    
    .btn:active {
        transform: scale(0.98);
    }
    
    .nav-btn:active {
        background: var(--accent-gold);
        color: var(--primary-dark);
    }
}

/* =====================================================
   ADDITIONAL MOBILE OPTIMIZATIONS
   ===================================================== */

/* Safe Area Support for Modern Phones (Notch/Island) */
@supports (padding: max(0px)) {
    .main-nav {
        padding-left: max(var(--spacing-lg), env(safe-area-inset-left));
        padding-right: max(var(--spacing-lg), env(safe-area-inset-right));
        padding-top: env(safe-area-inset-top);
    }
    
    .presentation-footer {
        padding-bottom: env(safe-area-inset-bottom);
    }
    
    .slide {
        padding-left: max(var(--spacing-md), env(safe-area-inset-left));
        padding-right: max(var(--spacing-md), env(safe-area-inset-right));
    }
}

/* Smooth Scrolling on Touch */
@media (hover: none) and (pointer: coarse) {
    .slide {
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }
    
    .sidebar {
        -webkit-overflow-scrolling: touch;
    }
    
    /* Larger touch targets */
    .nav-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    .menu-toggle {
        min-width: 44px;
        min-height: 44px;
    }
    
    .sidebar-item {
        min-height: 44px;
    }
}

/* Small Height Devices (Foldable Phones, Short Tablets) */
@media (max-height: 600px) and (orientation: portrait) {
    .slide {
        padding-top: var(--spacing-sm);
        padding-bottom: var(--spacing-sm);
    }
    
    .slide-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .slide-header {
        margin-bottom: var(--spacing-sm);
    }
}

/* Ultra-Wide Screens (4K, Ultrawide Monitors) */
@media (min-width: 2000px) {
    .slide-content {
        max-width: 1600px;
    }
    
    .slide-title {
        font-size: 4rem;
    }
    
    .slide--title .slide-title {
        font-size: 6rem;
    }
    
    .stat-value {
        font-size: 4rem;
    }
}

/* Hover Capable Devices - Enhanced Interactions */
@media (hover: hover) and (pointer: fine) {
    .card:hover,
    .feature-box:hover,
    .region-card:hover {
        transform: translateY(-5px);
    }
    
    .nav-btn:hover {
        transform: scale(1.1);
    }
    
    .sidebar-item:hover {
        background: rgba(255, 255, 255, 0.1);
    }
}