/* ===== MOBILE-FIRST SMOOTH ANIMATIONS ===== */

/* Base Mobile Optimizations */
* {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

html, body {
    overflow-x: hidden;
    position: relative;
    width: 100%;
    height: 100%;
}

/* Smooth Scrolling for Mobile */
html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

/* Mobile-First Animations */
@keyframes mobileSlideUp {
    0% {
        opacity: 0;
        transform: translate3d(0, 50px, 0) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translate3d(0, 0, 0) scale(1);
    }
}

@keyframes mobileFadeIn {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

@keyframes mobileScaleIn {
    0% {
        opacity: 0;
        transform: scale(0.8) translateZ(0);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateZ(0);
    }
}

@keyframes mobileFloat {
    0%, 100% {
        transform: translate3d(0, 0, 0) scale(1);
    }
    50% {
        transform: translate3d(0, -8px, 0) scale(1.02);
    }
}

@keyframes mobilePulse {
    0%, 100% {
        transform: scale(1) translateZ(0);
        opacity: 1;
    }
    50% {
        transform: scale(1.05) translateZ(0);
        opacity: 0.8;
    }
}

@keyframes mobileGlow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(52, 152, 219, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(52, 152, 219, 0.6);
    }
}

@keyframes mobileShake {
    0%, 100% {
        transform: translate3d(0, 0, 0) rotate(0deg);
    }
    25% {
        transform: translate3d(2px, -1px, 0) rotate(1deg);
    }
    50% {
        transform: translate3d(-1px, 1px, 0) rotate(-1deg);
    }
    75% {
        transform: translate3d(1px, -2px, 0) rotate(0.5deg);
    }
}

@keyframes mobileBounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0, 0, 0) scale(1);
    }
    40%, 43% {
        transform: translate3d(0, -15px, 0) scale(1.1);
    }
    70% {
        transform: translate3d(0, -8px, 0) scale(1.05);
    }
}

@keyframes mobileSlideInLeft {
    0% {
        opacity: 0;
        transform: translate3d(-30px, 0, 0) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translate3d(0, 0, 0) scale(1);
    }
}

@keyframes mobileSlideInRight {
    0% {
        opacity: 0;
        transform: translate3d(30px, 0, 0) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translate3d(0, 0, 0) scale(1);
    }
}

@keyframes mobileWave {
    0% {
        transform: translate3d(0, 0, 0) scale(1);
    }
    25% {
        transform: translate3d(3px, -2px, 0) scale(1.01);
    }
    50% {
        transform: translate3d(-2px, 2px, 0) scale(0.99);
    }
    75% {
        transform: translate3d(2px, -1px, 0) scale(1.02);
    }
    100% {
        transform: translate3d(0, 0, 0) scale(1);
    }
}

@keyframes mobileRipple {
    0% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    100% {
        transform: scale(2.5);
        opacity: 0;
    }
}

@keyframes mobileBreath {
    0%, 100% {
        transform: scale(1) translateZ(0);
        opacity: 0.7;
    }
    50% {
        transform: scale(1.08) translateZ(0);
        opacity: 1;
    }
}

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

@keyframes mobileFlip {
    0% {
        transform: perspective(400px) rotateY(0) translateZ(0);
    }
    50% {
        transform: perspective(400px) rotateY(180deg) translateZ(0);
    }
    100% {
        transform: perspective(400px) rotateY(360deg) translateZ(0);
    }
}

@keyframes mobileZoom {
    0% {
        transform: scale(1) translateZ(0);
    }
    50% {
        transform: scale(1.1) translateZ(0);
    }
    100% {
        transform: scale(1) translateZ(0);
    }
}

@keyframes mobileFadeInStagger {
    0% {
        opacity: 0;
        transform: translate3d(0, 20px, 0);
    }
    100% {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes mobileTextGlow {
    0%, 100% {
        text-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
    }
    50% {
        text-shadow: 0 0 20px rgba(52, 152, 219, 0.8),
                     0 0 30px rgba(52, 152, 219, 0.6);
    }
}

@keyframes mobileBorderFlow {
    0% {
        border-color: #3498db;
        box-shadow: 0 0 10px rgba(52, 152, 219, 0.3);
    }
    25% {
        border-color: #2ecc71;
        box-shadow: 0 0 15px rgba(46, 204, 113, 0.4);
    }
    50% {
        border-color: #e74c3c;
        box-shadow: 0 0 20px rgba(231, 76, 60, 0.5);
    }
    75% {
        border-color: #f39c12;
        box-shadow: 0 0 15px rgba(243, 156, 18, 0.4);
    }
    100% {
        border-color: #3498db;
        box-shadow: 0 0 10px rgba(52, 152, 219, 0.3);
    }
}

/* Mobile-Specific Animations */
@keyframes mobileParallax {
    0% {
        transform: translate3d(0, 0, 0) scale(1);
    }
    50% {
        transform: translate3d(0, -10px, 0) scale(1.02);
    }
    100% {
        transform: translate3d(0, 0, 0) scale(1);
    }
}

@keyframes mobileSwipe {
    0% {
        transform: translate3d(-100%, 0, 0);
        opacity: 0;
    }
    100% {
        transform: translate3d(0, 0, 0);
        opacity: 1;
    }
}

@keyframes mobileTapFeedback {
    0% {
        transform: scale(1) translateZ(0);
    }
    50% {
        transform: scale(0.95) translateZ(0);
    }
    100% {
        transform: scale(1) translateZ(0);
    }
}

/* ===== MOBILE ANIMATION CLASSES ===== */

/* Base animation classes for mobile */
.mobile-animate {
    animation-duration: 0.6s;
    animation-fill-mode: both;
    animation-timing-function: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.mobile-animate-slow {
    animation-duration: 1s;
}

.mobile-animate-fast {
    animation-duration: 0.3s;
}

/* Individual animation classes */
.mobile-slide-up {
    animation-name: mobileSlideUp;
}

.mobile-fade-in {
    animation-name: mobileFadeIn;
}

.mobile-scale-in {
    animation-name: mobileScaleIn;
}

.mobile-float {
    animation-name: mobileFloat;
    animation-duration: 3s;
    animation-iteration-count: infinite;
}

.mobile-pulse {
    animation-name: mobilePulse;
    animation-duration: 2s;
    animation-iteration-count: infinite;
}

.mobile-glow {
    animation-name: mobileGlow;
    animation-duration: 2s;
    animation-iteration-count: infinite;
}

.mobile-shake {
    animation-name: mobileShake;
    animation-duration: 0.5s;
}

.mobile-bounce {
    animation-name: mobileBounce;
    animation-duration: 1s;
}

.mobile-slide-left {
    animation-name: mobileSlideInLeft;
}

.mobile-slide-right {
    animation-name: mobileSlideInRight;
}

.mobile-wave {
    animation-name: mobileWave;
    animation-duration: 2s;
    animation-iteration-count: infinite;
}

.mobile-breath {
    animation-name: mobileBreath;
    animation-duration: 4s;
    animation-iteration-count: infinite;
}

.mobile-spin {
    animation-name: mobileSpin;
    animation-duration: 1s;
    animation-iteration-count: infinite;
}

.mobile-flip {
    animation-name: mobileFlip;
    animation-duration: 2s;
    animation-iteration-count: infinite;
}

.mobile-zoom {
    animation-name: mobileZoom;
    animation-duration: 2s;
    animation-iteration-count: infinite;
}

.mobile-text-glow {
    animation-name: mobileTextGlow;
    animation-duration: 2s;
    animation-iteration-count: infinite;
}

.mobile-border-flow {
    animation-name: mobileBorderFlow;
    animation-duration: 4s;
    animation-iteration-count: infinite;
}

.mobile-parallax {
    animation-name: mobileParallax;
    animation-duration: 3s;
    animation-iteration-count: infinite;
}

/* Staggered animations for lists */
.mobile-stagger-item {
    opacity: 0;
    animation: mobileFadeInStagger 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* Touch feedback */
.touch-feedback:active {
    animation: mobileTapFeedback 0.2s ease;
}

/* ===== MOBILE-SPECIFIC STYLES ===== */

/* Hero Section Mobile Optimizations */
.hero {
    min-height: 100vh;
    padding: 60px 20px;
    animation: mobileParallax 6s ease-in-out infinite;
}

.hero h2 {
    font-size: 2.5rem;
    animation: mobileTextGlow 4s ease-in-out infinite;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.1rem;
    animation: mobileFadeIn 1s ease-out 0.3s both;
    margin-bottom: 15px;
}

.hero .btn {
    animation: mobilePulse 2s ease-in-out infinite;
    margin: 10px 5px;
}

/* Cards Mobile Optimizations */
.card {
    margin: 15px 0;
    animation: mobileFloat 4s ease-in-out infinite;
    border-radius: 20px;
    overflow: hidden;
}

.card:hover {
    animation: mobileWave 1s ease;
}

.card-img {
    animation: mobileBreath 3s ease-in-out infinite;
}

.card-content {
    animation: mobileFadeIn 0.8s ease-out;
}

/* Navigation Mobile Optimizations */
.nav-link {
    animation: mobileSlideUp 0.6s ease-out;
    margin: 5px 0;
    border-radius: 15px;
}

.nav-link:active {
    animation: mobileTapFeedback 0.2s ease;
}

.nav-link i {
    animation: mobileSpin 3s linear infinite;
}

/* Buttons Mobile Optimizations */
.btn {
    animation: mobileBounce 2s ease-in-out infinite;
    border-radius: 15px;
    padding: 15px 25px;
    font-size: 1rem;
    margin: 8px 5px;
}

.btn:active {
    animation: mobileTapFeedback 0.2s ease;
}

/* Progress Bar Mobile */
.progress-bar {
    animation: mobileBorderFlow 3s ease-in-out infinite;
    height: 6px;
    border-radius: 3px;
}

/* Back to Top Mobile */
.back-to-top {
    animation: mobileFloat 3s ease-in-out infinite;
    width: 50px;
    height: 50px;
    border-radius: 25px;
}

.back-to-top:active {
    animation: mobileTapFeedback 0.2s ease, mobileSpin 0.5s ease;
}

/* Research Sections Mobile */
.research-section {
    animation: mobileSlideUp 0.8s ease-out;
    margin: 20px 0;
    border-radius: 25px;
}

.research-section:hover {
    animation: mobileGlow 2s ease-in-out infinite;
}

/* Mobile-Specific Elements */
.mobile-only {
    display: block;
}

.desktop-only {
    display: none;
}

/* Swipe animations */
.swipe-left {
    animation: mobileSlideInLeft 0.5s ease-out;
}

.swipe-right {
    animation: mobileSlideInRight 0.5s ease-out;
}

/* Ripple effect for buttons */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    animation: mobileRipple 0.6s ease-out;
}

/* Staggered animations delay */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }
.stagger-7 { animation-delay: 0.7s; }
.stagger-8 { animation-delay: 0.8s; }
.stagger-9 { animation-delay: 0.9s; }
.stagger-10 { animation-delay: 1s; }

/* ===== MOBILE RESPONSIVE ADJUSTMENTS ===== */

@media (max-width: 768px) {
    /* Base mobile adjustments */
    body {
        font-size: 14px;
        line-height: 1.6;
    }
    
    .container {
        width: 95%;
        padding: 0 10px;
    }
    
    /* Hero section mobile */
    .hero {
        padding: 40px 15px;
        min-height: 70vh;
    }
    
    .hero h2 {
        font-size: 2rem;
        margin-bottom: 15px;
    }
    
    .hero p {
        font-size: 1rem;
        margin-bottom: 10px;
    }
    
    /* Cards mobile */
    .card-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .card {
        margin: 10px 0;
    }
    
    /* Navigation mobile */
    .nav-list {
        flex-direction: column;
        gap: 10px;
    }
    
    .nav-link {
        padding: 12px 15px;
        text-align: center;
    }
    
    /* Buttons mobile */
    .btn {
        display: block;
        width: 100%;
        margin: 10px 0;
        padding: 12px 20px;
    }
    
    /* Progress bar mobile */
    .progress-container {
        height: 4px;
    }
    
    /* Research sections mobile */
    .research-section {
        padding: 20px;
        margin: 15px 0;
    }
    
    /* Back to top mobile */
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        left: 20px;
    }
    
    /* Mobile touch improvements */
    .touch-target {
        min-height: 44px;
        min-width: 44px;
        padding: 12px 16px;
    }
    
    /* Hide heavy animations on mobile */
    .hero::before,
    .hero::after,
    .card::before,
    .card::after {
        display: none;
    }
}

@media (max-width: 480px) {
    /* Extra small devices */
    .hero h2 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 0.9rem;
    }
    
    .card {
        margin: 8px 0;
    }
    
    .btn {
        padding: 10px 15px;
        font-size: 0.9rem;
    }
    
    .research-section {
        padding: 15px;
    }
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */

/* Hardware acceleration */
.mobile-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Reduce animations for low-power devices */
@media (prefers-reduced-motion: reduce) {
    .mobile-animate,
    .hero,
    .card,
    .btn,
    .nav-link,
    .research-section,
    .back-to-top {
        animation: none !important;
        transition: none !important;
    }
}

/* Battery saving mode */
@media (prefers-reduced-data: reduce) {
    .hero,
    .card,
    .research-section {
        background: none;
    }
    
    .mobile-animate {
        animation: none !important;
    }
}

/* Touch device detection */
@media (hover: none) and (pointer: coarse) {
    .card:hover,
    .btn:hover,
    .nav-link:hover {
        animation: none;
    }
    
    .card:active,
    .btn:active,
    .nav-link:active {
        animation: mobileTapFeedback 0.2s ease;
    }
}

/* Orientation changes */
@media (orientation: portrait) {
    .hero {
        min-height: 100vh;
    }
}

@media (orientation: landscape) and (max-height: 500px) {
    .hero {
        min-height: 100vh;
        padding: 20px 15px;
    }
    
    .hero h2 {
        font-size: 1.5rem;
    }
}

/* ===== MOBILE INTERACTION ENHANCEMENTS ===== */

/* Smooth scroll for anchor links */
@media (max-width: 768px) {
    html {
        scroll-behavior: smooth;
    }
}

/* Pull-to-refresh style animations */
.pull-indicator {
    animation: mobileBreath 2s ease-in-out infinite;
}

/* Swipe gestures feedback */
.swipe-hint {
    animation: mobileSlideRight 1s ease-in-out infinite alternate;
}

/* Loading states for mobile */
.mobile-loading {
    animation: mobilePulse 1.5s ease-in-out infinite;
}

.mobile-loading-dots::after {
    content: '';
    animation: mobileLoadingDots 1.5s infinite;
}

@keyframes mobileLoadingDots {
    0%, 20% {
        content: '.';
    }
    40% {
        content: '..';
    }
    60%, 100% {
        content: '...';
    }
}

/* Success/error states */
.mobile-success {
    animation: mobileBounce 0.6s ease;
}

.mobile-error {
    animation: mobileShake 0.5s ease;
}

/* Vibration-like feedback */
.mobile-vibrate {
    animation: mobileShake 0.3s ease;
}
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  /* Reset and Base Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Vazirmatn', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        :root {
            --primary: #1a5276;
            --secondary: #2980b9;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --success: #27ae60;
            --warning: #f39c12;
            --info: #17a2b8;
            --transition: all 0.3s ease;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            --radius: 10px;
        }
        
        [data-theme="dark"] {
            --primary: #3498db;
            --secondary: #2c8ac9;
            --accent: #e74c3c;
            --light: #2c3e50;
            --dark: #ecf0f1;
            --success: #2ecc71;
            --warning: #f1c40f;
            --info: #1abc9c;
        }
        
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.8;
            font-size: 16px;
            counter-reset: section;
            transition: var(--transition);
        }
        
        body.dark-mode {
            background-color: #1a1a2e;
            color: #e6e6e6;
        }
        
        /* New Modern Header Styles */
        :root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
            --text-color: #333;
            --text-light: #7f8c8d;
            --white: #ffffff;
            --shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        
        /* Dark Theme Variables */
        [data-theme="dark"] {
            --primary-color: #1a1a2e;
            --secondary-color: #0f3460;
            --accent-color: #e94560;
            --light-color: #16213e;
            --dark-color: #0f3460;
            --text-color: #f1f1f1;
            --text-light: #bdc3c7;
        }
        
        /* Header Styles */
        .site-header {
            background-color: var(--white);
            box-shadow: var(--shadow);
            position: fixed;
            width: 100%;
            top: 0;
            left: 0;
            z-index: 1000;
            transition: var(--transition);
            font-family: 'Vazirmatn', sans-serif;
        }
        
        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        
        /* Brand Section */
        .brand-section {
            display: flex;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
            text-decoration: none;
            color: var(--text-color);
            font-weight: 700;
            font-size: 1.3rem;
            transition: var(--transition);
        }
        
        .logo:hover {
            color: var(--secondary-color);
        }
        
        .logo-icon {
            color: var(--accent-color);
            margin-left: 10px;
            font-size: 1.6rem;
        }
        
        /* Navigation */
        .main-nav {
            flex: 1;
            display: flex;
            justify-content: center;
        }
        
        .nav-list {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        
        .nav-item {
            margin: 0 5px;
        }
        
        .nav-link {
            display: flex;
            align-items: center;
            padding: 10px 18px;
            color: var(--text-color);
            text-decoration: none;
            border-radius: 6px;
            transition: var(--transition);
            font-weight: 500;
            font-size: 0.95rem;
        }
        
        .nav-link i {
            margin-left: 8px;
            font-size: 1.1em;
            color: var(--accent-color);
        }
        
        .nav-link:hover {
            background-color: rgba(52, 152, 219, 0.1);
            color: var(--secondary-color);
        }
        
        .nav-link.active {
            background-color: var(--secondary-color);
            color: white !important;
        }
        
        .nav-link.active i {
            color: white;
        }
        
        /* Header Actions */
        .header-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        /* Search Box */
        .search-box {
            position: relative;
            display: flex;
            align-items: center;
        }
        
        .search-input {
            padding: 8px 15px;
            border: 1px solid #ddd;
            border-radius: 20px;
            width: 200px;
            font-family: 'Vazirmatn', sans-serif;
            transition: var(--transition);
            padding-left: 40px;
        }
        
        .search-input:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
        }
        
        .search-btn {
            position: absolute;
            left: 10px;
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
            transition: var(--transition);
        }
        
        .search-btn:hover {
            color: var(--secondary-color);
        }
        
        /* Theme Toggle */
        .theme-toggle {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--light-color);
            padding: 6px 12px;
            border-radius: 20px;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .theme-toggle:hover {
            background: #e0e0e0;
        }
        
        .theme-toggle i {
            color: var(--text-color);
            font-size: 1.1rem;
        }
        
        .theme-toggle .fa-sun {
            color: #f1c40f;
        }
        
        .switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
        }
        
        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }
        
        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 34px;
        }
        
        .slider:before {
            position: absolute;
            content: "";
            height: 16px;
            width: 16px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }
        
        input:checked + .slider {
            background-color: #2196F3;
        }
        
        input:focus + .slider {
            box-shadow: 0 0 1px #2196F3;
        }
        
        input:checked + .slider:before {
            transform: translateX(26px);
        }
        
        /* Mobile Menu Toggle */
        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: space-between;
            width: 30px;
            height: 21px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 0;
            margin-right: 15px;
        }
        
        .menu-bar {
            width: 100%;
            height: 3px;
            background-color: var(--text-color);
            border-radius: 2px;
            transition: var(--transition);
        }
        
        /* Responsive Styles */
        @media (max-width: 992px) {
            .header-container {
                padding: 0 15px;
            }
            
            .main-nav {
                position: fixed;
                top: 70px;
                right: -100%;
                width: 80%;
                max-width: 400px;
                height: calc(100vh - 70px);
                background-color: var(--white);
                box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
                transition: var(--transition);
                padding: 20px;
                overflow-y: auto;
                z-index: 999;
            }
            
            .main-nav.active {
                right: 0;
            }
            
            .nav-list {
                flex-direction: column;
                width: 100%;
            }
            
            .nav-item {
                margin: 5px 0;
                width: 100%;
            }
            
            .nav-link {
                padding: 12px 15px;
                border-radius: 8px;
            }
            
            .mobile-menu-toggle {
                display: flex;
            }
            
            .header-actions {
                margin-right: auto;
                margin-left: 15px;
            }
            
            .search-box {
                display: none;
            }
        }
        
        @media (max-width: 576px) {
            .logo-text {
                display: none;
            }
            
            .theme-toggle span {
                display: none;
            }
        }
        
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo h1 {
            font-size: 1.6rem;
            margin-right: 10px;
        }
        
        .logo-icon {
            font-size: 2rem;
            color: var(--accent);
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin: 0 8px;
        }
        
        nav ul li a {
            color: white;
            text-decoration: none;
            padding: 8px 15px;
            border-radius: 5px;
            transition: var(--transition);
            font-weight: 500;
            font-size: 0.95rem;
        }
        
        nav ul li a:hover {
            background-color: rgba(255, 255, 255, 0.2);
        }
        
        .theme-toggle {
            background: none;
            border: none;
            color: white;
            font-size: 1.2rem;
            cursor: pointer;
            margin-right: 15px;
        }
        
        .mobile-menu {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
        }
        
        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            color: white;
            padding: 100px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.1)"/></svg>');
            background-size: cover;
        }
        
        .hero h2 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            position: relative;
        }
        
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 30px;
            position: relative;
        }
        
        .btn {
            display: inline-block;
            background-color: var(--accent);
            color: white;
            padding: 12px 30px;
            border-radius: 5px;
            text-decoration: none;
            font-weight: bold;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            font-size: 1rem;
            position: relative;
        }
        
        .btn:hover {
            background-color: #c0392b;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        
        /* Main Content */
        .main-content {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            position: relative;
        }
        
        .section-title h2 {
            font-size: 2.3rem;
            color: var(--primary);
            display: inline-block;
            padding-bottom: 15px;
        }
        
        .section-title h2:after {
            content: '';
            position: absolute;
            width: 100px;
            height: 4px;
            background-color: var(--accent);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-bottom: 50px;
        }
        
        .card {
            background-color: white;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        
        .dark-mode .card {
            background-color: #2c3e50;
            color: #e6e6e6;
        }
        
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        
        .card-img {
            height: 180px;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
        }
        
        .card-content {
            padding: 25px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .card h3 {
            color: var(--primary);
            margin-bottom: 15px;
            font-size: 1.5rem;
            border-bottom: 2px solid var(--light);
            padding-bottom: 10px;
        }
        
        .card p {
            margin-bottom: 15px;
            flex-grow: 1;
        }
        
        .card-meta {
            margin-top: auto;
            padding-top: 15px;
            border-top: 1px solid #eee;
            font-size: 0.9rem;
            color: #666;
        }
        
        /* Page Content Styles */
        .page-content {
            padding: 50px 0;
        }
        
        .page-content h2 {
            color: var(--primary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light);
            font-size: 1.8rem;
            counter-increment: section;
            position: relative;
            padding-right: 40px;
        }
        
        .page-content h2:before {
            content: counter(section) ".";
            position: absolute;
            right: 0;
            color: var(--accent);
            font-weight: bold;
        }
        
        .page-content h3 {
            color: var(--secondary);
            margin: 30px 0 15px;
            font-size: 1.5rem;
            position: relative;
            padding-right: 30px;
        }
        
        .page-content h3:before {
            content: "•";
            position: absolute;
            right: 0;
            color: var(--accent);
            font-weight: bold;
        }
        
        .page-content h4 {
            color: var(--dark);
            margin: 25px 0 12px;
            font-size: 1.3rem;
        }
        
        .page-content p {
            margin-bottom: 20px;
            text-align: justify;
            line-height: 1.8;
        }
        
        .page-content ul, .page-content ol {
            margin: 20px 0;
            padding-right: 25px;
        }
        
        .page-content li {
            margin-bottom: 12px;
            position: relative;
        }
        
        .page-content ul li:before {
            content: "▪";
            color: var(--accent);
            font-weight: bold;
            display: inline-block;
            width: 1em;
            margin-right: 5px;
        }
        
        .highlight-box {
            background-color: var(--light);
            padding: 25px;
            border-radius: var(--radius);
            border-right: 5px solid var(--secondary);
            margin: 25px 0;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .info-box {
            background-color: #e8f4fc;
            border: 1px solid var(--secondary);
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
        }
        
        .dark-mode .info-box {
            background-color: #1a3a4e;
        }
        
        .warning-box {
            background-color: #fef9e7;
            border: 1px solid var(--warning);
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
        }
        
        .dark-mode .warning-box {
            background-color: #4a3c1a;
        }
        
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border-radius: 8px;
            overflow: hidden;
        }
        
        table th, table td {
            padding: 15px;
            text-align: right;
            border-bottom: 1px solid #ddd;
        }
        
        table th {
            background-color: var(--primary);
            color: white;
            font-weight: 600;
        }
        
        table tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        
        .dark-mode table tr:nth-child(even) {
            background-color: #2c3e50;
        }
        
        table tr:hover {
            background-color: #e9f7fe;
        }
        
        .dark-mode table tr:hover {
            background-color: #34495e;
        }
        
        /* Team Section */
        .team {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 50px;
        }
        
        .team-member {
            text-align: center;
            max-width: 280px;
            background: white;
            padding: 25px;
            border-radius: var(--radius);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
        }
        
        .dark-mode .team-member {
            background: #2c3e50;
        }
        
        .team-member:hover {
            transform: translateY(-10px);
        }
        
        .team-member .avatar {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            margin-bottom: 15px;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
            margin: 0 auto 15px;
        }
        
        .team-member h3 {
            color: var(--primary);
            margin-bottom: 5px;
            font-size: 1.4rem;
        }
        
        .team-member p {
            color: var(--secondary);
            margin-bottom: 15px;
        }
        
        /* Footer */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 20px;
        }
        
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        
        .footer-section h3 {
            font-size: 1.5rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-section h3:after {
            content: '';
            position: absolute;
            width: 50px;
            height: 2px;
            background-color: var(--accent);
            bottom: 0;
            right: 0;
        }
        
        .footer-section p {
            margin-bottom: 15px;
            line-height: 1.7;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #ccc;
        }
        
        /* New Features */
        
        /* Progress Bar */
        .progress-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: transparent;
            z-index: 1001;
        }
        
        .progress-bar {
            height: 5px;
            background: var(--accent);
            width: 0%;
            transition: width 0.3s ease;
        }
        
        /* Back to Top Button */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            left: 30px;
            background: var(--accent);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 999;
        }
        
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        
        .back-to-top:hover {
            background: #c0392b;
            transform: translateY(-3px);
        }
        
        /* Search Bar */
        .search-container {
            margin: 20px 0;
            display: flex;
            justify-content: center;
        }
        
        .search-box {
            width: 100%;
            max-width: 500px;
            position: relative;
        }
        
        .search-input {
            width: 100%;
            padding: 12px 50px 12px 20px;
            border: 2px solid var(--secondary);
            border-radius: 30px;
            font-size: 1rem;
            transition: var(--transition);
        }
        
        .search-input:focus {
            outline: none;
            box-shadow: 0 0 10px rgba(41, 128, 185, 0.3);
        }
        
        .search-btn {
            position: absolute;
            left: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--secondary);
            color: white;
            border: none;
            border-radius: 50%;
            width: 35px;
            height: 35px;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .search-btn:hover {
            background: var(--primary);
        }
        
        /* Quiz Section */
        .quiz-container {
            background: white;
            border-radius: var(--radius);
            padding: 30px;
            margin: 30px 0;
            box-shadow: var(--shadow);
        }
        
        .dark-mode .quiz-container {
            background: #2c3e50;
        }
        
        .quiz-question {
            font-size: 1.2rem;
            margin-bottom: 20px;
            color: var(--primary);
        }
        
        .quiz-options {
            list-style: none;
            padding: 0;
        }
        
        .quiz-options li {
            margin-bottom: 10px;
            padding: 10px;
            background: #f8f9fa;
            border-radius: 5px;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .dark-mode .quiz-options li {
            background: #34495e;
        }
        
        .quiz-options li:hover {
            background: #e9ecef;
        }
        
        .dark-mode .quiz-options li:hover {
            background: #3d5166;
        }
        
        .quiz-options li.selected {
            background: var(--secondary);
            color: white;
        }
        
        .quiz-result {
            margin-top: 20px;
            padding: 15px;
            border-radius: 5px;
            text-align: center;
            font-weight: bold;
            display: none;
        }
        
        .quiz-result.correct {
            background: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        
        .quiz-result.incorrect {
            background: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        
        /* Interactive Gallery */
        .gallery {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin: 20px 0;
        }
        
        .gallery-item {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius);
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
            cursor: pointer;
        }
        
        .gallery-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .gallery-item:hover .gallery-img {
            transform: scale(1.05);
        }
        
        .gallery-caption {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 10px;
            transform: translateY(100%);
            transition: var(--transition);
        }
        
        .gallery-item:hover .gallery-caption {
            transform: translateY(0);
        }
        
        /* Modal for Gallery */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            z-index: 1100;
            align-items: center;
            justify-content: center;
        }
        
        .modal-content {
            max-width: 90%;
            max-height: 90%;
            border-radius: var(--radius);
            overflow: hidden;
            position: relative;
        }
        
        .modal-img {
            width: 100%;
            height: auto;
            display: block;
        }
        
        .modal-close {
            position: absolute;
            top: 15px;
            left: 15px;
            background: rgba(0, 0, 0, 0.5);
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .modal-close:hover {
            background: rgba(0, 0, 0, 0.8);
        }
        
        /* Responsive Design */
        @media (max-width: 992px) {
            .hero h2 {
                font-size: 2.3rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
        }
        
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            nav ul {
                margin-top: 20px;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            .mobile-menu {
                display: block;
                position: absolute;
                top: 20px;
                left: 20px;
            }
            
            .hero h2 {
                font-size: 2rem;
            }
            
            .hero p {
                font-size: 1.1rem;
            }
            
            .section-title h2 {
                font-size: 1.8rem;
            }
            
            .card-grid {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                flex-direction: column;
            }
        }
        
        @media (max-width: 576px) {
            .hero {
                padding: 80px 0;
            }
            
            .hero h2 {
                font-size: 1.8rem;
            }
            
            .main-content {
                padding: 60px 0;
            }
            
            .page-content h2 {
                font-size: 1.6rem;
            }
            
            .page-content h3 {
                font-size: 1.4rem;
            }
            
            .back-to-top {
                bottom: 20px;
                left: 20px;
                width: 45px;
                height: 45px;
            }
        }
        
        /* Print Styles */
        @media print {
            header, footer, .btn, .hero, .search-container, .quiz-container, .back-to-top {
                display: none;
            }
            
            body {
                font-size: 12pt;
                line-height: 1.4;
                color: #000;
                background: #fff;
            }
            
            .container {
                width: 100%;
                max-width: none;
            }
            
            .page-content {
                padding: 0;
            }
            
            .card {
                break-inside: avoid;
                box-shadow: none;
                border: 1px solid #ddd;
            }
            
            table {
                break-inside: avoid;
            }
            
            .main-content {
                padding: 20px 0;
            }
            
            .research-section {
                box-shadow: none;
                border: 1px solid #ddd;
            }
        }
        
        /* Additional Research Styles */
        .research-section {
            background: white;
            border-radius: var(--radius);
            padding: 30px;
            margin-bottom: 40px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .dark-mode .research-section {
            background: #2c3e50;
        }
        
        .chapter-title {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 20px;
            border-radius: var(--radius);
            margin: 40px 0 25px;
            text-align: center;
            font-size: 1.8rem;
            counter-reset: subsection;
        }
        
        .reference {
            background: #f9f9f9;
            border-right: 3px solid var(--accent);
            padding: 15px;
            margin: 15px 0;
            border-radius: 5px;
        }
        
        .dark-mode .reference {
            background: #34495e;
        }
        
        .figure {
            text-align: center;
            margin: 25px 0;
        }
        
        .figure .placeholder {
            background-color: #e9ecef;
            height: 250px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 10px;
        }
        
        .dark-mode .figure .placeholder {
            background-color: #34495e;
        }
        
        .caption {
            font-style: italic;
            margin-top: 10px;
            color: #666;
            text-align: center;
        }
        
        .definition {
            background: #f0f7ff;
            border: 1px dashed var(--secondary);
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
        }
        
        .dark-mode .definition {
            background: #1a3a4e;
        }
        
        .teacher-info {
            background: linear-gradient(135deg, var(--info), var(--secondary));
            color: white;
            padding: 20px;
            border-radius: var(--radius);
            margin: 30px 0;
            text-align: center;
        }
        
        .teacher-info h3 {
            margin-bottom: 10px;
            font-size: 1.6rem;
        }
        
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 40px auto;
        }
        
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--secondary);
            top: 0;
            bottom: 0;
            right: 50%;
            margin-right: -3px;
        }
        
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }
        
        .timeline-item::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background-color: white;
            border: 4px solid var(--accent);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
        }
        
        .left {
            right: 0;
        }
        
        .left::after {
            left: -10px;
        }
        
        .right {
            right: 50%;
        }
        
        .right::after {
            left: -10px;
        }
        
        .timeline-content {
            padding: 20px;
            background-color: white;
            border-radius: 6px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
        }
        
        .dark-mode .timeline-content {
            background-color: #2c3e50;
        }
        
        .timeline-content h4 {
            margin-top: 0;
            color: var(--primary);
        }
        
        .stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-around;
            margin: 30px 0;
        }
        
        .stat-item {
            text-align: center;
            padding: 20px;
            flex: 1;
            min-width: 150px;
        }
        
        .stat-value {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary);
            display: block;
        }
        
        .stat-label {
            font-size: 1rem;
            color: var(--dark);
        }
        
        .tool-category {
            margin: 30px 0;
            padding: 20px;
            background: #f8f9fa;
            border-radius: 8px;
        }
        
        .dark-mode .tool-category {
            background: #34495e;
        }
        
        .tool-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin-top: 15px;
        }
        
        .tool-item {
            background: white;
            padding: 15px;
            border-radius: 6px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            border-right: 3px solid var(--secondary);
        }
        
        .dark-mode .tool-item {
            background: #2c3e50;
        }
        
        .market-analysis {
            background: white;
            border-radius: var(--radius);
            padding: 25px;
            margin: 25px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .dark-mode .market-analysis {
            background: #2c3e50;
        }
        
        .opportunity-card {
            background: white;
            border-radius: 8px;
            padding: 20px;
            margin: 15px 0;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            border-right: 4px solid var(--success);
        }
        
        .dark-mode .opportunity-card {
            background: #2c3e50;
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }
        
        .comparison-table th, .comparison-table td {
            padding: 12px 15px;
            text-align: center;
            border: 1px solid #ddd;
        }
        
        .comparison-table th {
            background-color: var(--primary);
            color: white;
        }
        
        .comparison-table tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        
        .dark-mode .comparison-table tr:nth-child(even) {
            background-color: #34495e;
        }
        
        .step-by-step {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
        }
        
        .dark-mode .step-by-step {
            background: #34495e;
        }
        
        .step {
            margin-bottom: 15px;
            padding-right: 20px;
            position: relative;
        }
        
        .step:before {
            content: counter(step);
            counter-increment: step;
            position: absolute;
            right: 0;
            top: 0;
            background: var(--accent);
            color: white;
            width: 25px;
            height: 25px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        
        .case-study {
            background: white;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            border-left: 4px solid var(--warning);
        }
        
        .dark-mode .case-study {
            background: #2c3e50;
        }
        
        .faq-section {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
        }
        
        .dark-mode .faq-section {
            background: #34495e;
        }
        
        .faq-item {
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px solid #ddd;
        }
        
        .faq-question {
            font-weight: bold;
            color: var(--primary);
            margin-bottom: 5px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-question:after {
            content: '+';
            font-size: 1.2rem;
        }
        
        .faq-question.active:after {
            content: '-';
        }
        
        .faq-answer {
            display: none;
            padding-top: 10px;
        }
        
        .faq-answer.show {
            display: block;
        }
        
        .glossary {
            background: white;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
        }
        
        .dark-mode .glossary {
            background: #2c3e50;
        }
        
        .glossary-term {
            font-weight: bold;
            color: var(--primary);
            margin-bottom: 5px;
        }
        
        .appendix {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 20px;
            margin: 20px 0;
        }
        
        .dark-mode .appendix {
            background: #34495e;
        }