/* file name: آب-چرخه.css */
/* Reset and Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --primary-light: #4da6ff;
    --secondary: #00b4d8;
    --accent: #4cd3c2;
    --accent-dark: #38b2a3;
    --dark: #1a3c5e;
    --dark-light: #2d4d6e;
    --light: #f8fafc;
    --light-dark: #e2e8f0;
    --text: #334155;
    --text-light: #64748b;
    --white: #ffffff;
    --footer-bg: #1a1a2e;
    --footer-text: #cccccc;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-accent: linear-gradient(135deg, var(--secondary), var(--accent));
    --gradient-dark: linear-gradient(135deg, var(--dark), var(--dark-light));
    --gradient-light: linear-gradient(135deg, var(--light), var(--white));
    --gradient-ocean: linear-gradient(to bottom, #1e3c8b, #2d5aa0);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 50%;
    
    /* Spacing - واحدهای نسبی برای ریسپانسیو */
    --space-xs: clamp(0.25rem, 0.5vw, 0.5rem);
    --space-sm: clamp(0.5rem, 1vw, 1rem);
    --space-md: clamp(0.75rem, 1.5vw, 1.5rem);
    --space-lg: clamp(1rem, 2vw, 2rem);
    --space-xl: clamp(1.5rem, 3vw, 3rem);
    --space-2xl: clamp(2rem, 4vw, 4rem);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: Vazir, sans-serif;
    background: var(--white);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    direction: rtl;
    text-align: right;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    word-wrap: break-word;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Typography Responsive */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

h1 { 
    font-size: clamp(2rem, 5vw, 3.5rem); 
    margin-bottom: var(--space-md);
}

h2 { 
    font-size: clamp(1.75rem, 4vw, 2.5rem); 
    margin-bottom: var(--space-sm);
}

h3 { 
    font-size: clamp(1.5rem, 3vw, 2rem); 
}

h4 { 
    font-size: clamp(1.25rem, 2.5vw, 1.5rem); 
}

p {
    margin-bottom: var(--space-sm);
    font-size: clamp(1rem, 1.2vw, 1.1rem);
    line-height: 1.7;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-screen.loaded {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    color: var(--white);
}

.water-drop-loading {
    width: clamp(40px, 8vw, 60px);
    height: clamp(40px, 8vw, 60px);
    background: var(--white);
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    margin: 0 auto var(--space-md);
    animation: dropBounce 1.5s infinite;
    position: relative;
}

.water-drop-loading::after {
    content: '';
    position: absolute;
    width: 50%;
    height: 50%;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    top: 25%;
    left: 25%;
}

.loading-text {
    font-size: clamp(1rem, 2vw, 1.2rem);
    animation: pulse 2s infinite;
}

@keyframes dropBounce {
    0%, 100% {
        transform: rotate(-45deg) translateY(0);
    }
    50% {
        transform: rotate(-45deg) translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
    padding: var(--space-sm) 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--dark);
}

.logo-icon {
    width: clamp(32px, 5vw, 40px);
    height: clamp(32px, 5vw, 40px);
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: clamp(1rem, 2vw, 1.2rem);
}

.logo-text {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    font-weight: 700;
    color: var(--dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: clamp(0.5rem, 2vw, 1rem);
    transition: var(--transition-normal);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: var(--transition-fast);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(0, 102, 204, 0.1);
}

.nav-link i {
    font-size: 1.1em;
}

.nav-actions {
    display: flex;
    align-items: center;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: var(--space-xs);
    z-index: 1001;
}

.bar {
    width: 24px;
    height: 3px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition-normal);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--gradient-primary);
    overflow: hidden;
    padding-top: 80px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-md);
}

.hero-content {
    color: var(--white);
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: clamp(0.8rem, 1.5vw, 0.9rem);
    margin-bottom: var(--space-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    margin-bottom: var(--space-md);
    line-height: 1.1;
}

.title-word {
    display: inline-block;
    animation: titleSlideUp 1s ease-out forwards;
    opacity: 0;
}

.title-word-1 { animation-delay: 0.2s; }
.title-word-2 { 
    animation-delay: 0.4s; 
    color: var(--accent);
}
.title-word-3 { animation-delay: 0.6s; }

@keyframes titleSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    margin-bottom: var(--space-xl);
    opacity: 0.9;
    line-height: 1.6;
    max-width: 90%;
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
    min-width: 120px;
}

.stat-number {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--space-xs);
    color: var(--accent);
    display: block;
}

.stat-label {
    font-size: clamp(0.8rem, 1.5vw, 0.9rem);
    opacity: 0.8;
    display: block;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: clamp(0.75rem, 1.5vw, 1rem) clamp(1rem, 2vw, 1.5rem);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    justify-content: center;
    min-height: 48px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: var(--transition-slow);
}

.btn-primary:hover .btn-shine {
    left: 100%;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    height: clamp(250px, 40vw, 400px);
}

.water-cycle-animation {
    position: relative;
    width: 100%;
    height: 100%;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--white);
    opacity: 0.8;
}

.scroll-text {
    font-size: 0.9rem;
    margin-bottom: var(--space-xs);
    display: block;
}

.scroll-arrow {
    animation: bounce 2s infinite;
    display: block;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding: 0 var(--space-md);
}

.section-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--dark);
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Overview Section */
.overview {
    padding: var(--space-2xl) 0;
    background: var(--white);
}

.overview-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.card-visual {
    position: relative;
    overflow: hidden;
    min-height: 300px;
}

.cycle-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.cycle-image:hover {
    transform: scale(1.05);
}

.card-content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-content h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--dark);
    margin-bottom: var(--space-md);
}

.card-content > p {
    font-size: clamp(1rem, 1.5vw, 1.1rem);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
    color: var(--text);
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.feature-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.feature-icon {
    width: clamp(48px, 6vw, 60px);
    height: clamp(48px, 6vw, 60px);
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    flex-shrink: 0;
}

.feature-content h4 {
    font-size: clamp(1.1rem, 2vw, 1.2rem);
    color: var(--dark);
    margin-bottom: var(--space-xs);
}

.feature-content p {
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    color: var(--text-light);
    margin: 0;
    line-height: 1.6;
}

/* Stages Section */
.stages {
    padding: var(--space-2xl) 0;
    background: var(--light);
}

.stages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    padding: 0 var(--space-md);
}

.stage-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.stage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.stage-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.stage-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.stage-card:hover .stage-image img {
    transform: scale(1.05);
}

.stage-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.stage-card:hover .stage-overlay {
    opacity: 1;
}

.stage-btn {
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    transition: var(--transition-normal);
}

.stage-btn:hover {
    transform: scale(1.05);
}

.stage-info {
    padding: var(--space-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.stage-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.stage-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    opacity: 0.8;
}

.stage-title {
    font-size: 1.5rem;
    color: var(--dark);
    margin: 0;
}

.stage-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text);
    margin-bottom: var(--space-lg);
    flex: 1;
}

.stage-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.stage-features span {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.9rem;
    color: var(--text-light);
}

.stage-features i {
    color: var(--accent);
    font-size: 0.9rem;
}

/* Video Section */
.video-section {
    padding: var(--space-2xl) 0;
    background: var(--white);
}

.video-wrapper {
    max-width: 800px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: #000;
}

.h_iframe-aparat_embed_frame {
    position: relative;
    width: 100%;
}

.h_iframe-aparat_embed_frame span {
    display: block;
    padding-top: 56.25%;
}

.h_iframe-aparat_embed_frame iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
    background: #000;
}

/* About Section */
.about {
    padding: var(--space-2xl) 0;
    background: var(--light);
}

.about-content {
    padding: 0 var(--space-md);
}

.about-text h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--dark);
    margin-bottom: var(--space-md);
    text-align: center;
}

.about-text > p {
    font-size: clamp(1rem, 1.5vw, 1.1rem);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.mission-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
}

.mission-item {
    background: var(--white);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.mission-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.mission-item i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: var(--space-md);
    display: block;
}

.mission-item h4 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: var(--space-sm);
}

.mission-item p {
    font-size: 1rem;
    color: var(--text-light);
    margin: 0;
}

/* Footer */
.site-footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: var(--space-2xl) 0 var(--space-lg);
    margin-top: var(--space-2xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.footer-column {
    padding: var(--space-sm);
}

.footer-column h4 {
    color: var(--white);
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--primary);
    position: relative;
}

.footer-column h4::after {
    content: '';
    position: absolute;
    bottom: -2px;
    right: 0;
    width: 50px;
    height: 2px;
    background: var(--accent);
}

.footer-column p {
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    line-height: 1.7;
    color: var(--footer-text);
    opacity: 0.8;
}

.footer-column ul {
    list-style: none;
    padding: 0;
}

.footer-column ul li {
    margin-bottom: var(--space-sm);
}

.footer-column ul li a {
    color: var(--footer-text);
    text-decoration: none;
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    transition: var(--transition-fast);
    display: block;
    padding: var(--space-xs) 0;
    opacity: 0.8;
}

.footer-column ul li a:hover {
    color: var(--primary-light);
    opacity: 1;
    transform: translateX(-5px);
}

.contact-list {
    list-style: none;
    padding: 0;
}

.contact-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    color: var(--footer-text);
    opacity: 0.8;
}

.contact-info i {
    color: var(--primary-light);
    width: 20px;
    font-size: 1.1rem;
}

.contact-info span {
    font-size: clamp(0.9rem, 1.5vw, 1rem);
}

/* Social Icons */
.social-icons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-top: var(--space-md);
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: clamp(40px, 6vw, 48px);
    height: clamp(40px, 6vw, 48px);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-icon:hover {
    background: var(--primary);
    transform: translateY(-3px) scale(1.1);
    border-color: var(--primary-light);
}

.social-icon-img {
    width: 60%;
    height: 60%;
    object-fit: contain;
    transition: var(--transition-normal);
}

.social-icon:hover .social-icon-img {
}

/* Footer Bottom */
.footer-bottom {
    text-align: center;
    padding: var(--space-lg) 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: var(--space-xl);
    color: var(--footer-text);
    opacity: 0.7;
    font-size: clamp(0.8rem, 1.5vw, 0.9rem);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.modal-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--white);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translate(-50%, -60%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--light-dark);
    background: var(--gradient-primary);
    color: var(--white);
}

.modal-header h3 {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    margin: 0;
    color: var(--white);
}

.modal-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    font-size: 1.5rem;
    color: var(--white);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

.modal-body {
    display: grid;
    grid-template-columns: 1fr;
    max-height: 70vh;
    overflow-y: auto;
}

.modal-visual {
    padding: var(--space-lg);
    position: relative;
}

.modal-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.modal-content {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.modal-description p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text);
}

.modal-details h4 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: var(--space-md);
}

.details-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
}

.details-grid .detail-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    color: var(--text-light);
}

.details-grid .detail-item i {
    color: var(--accent);
    width: 20px;
}

.modal-fun-fact {
    background: var(--light);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.fun-fact-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.fun-fact-content h5 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: var(--space-xs);
}

.fun-fact-content p {
    font-size: 1rem;
    color: var(--text);
    margin: 0;
}

/* Water Cycle Animation Elements */
.cycle-base {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40%;
}

.ocean {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-ocean);
    border-radius: 50% 50% 0 0;
}

.land {
    position: absolute;
    bottom: 40%;
    left: 20%;
    width: 60%;
    height: 20%;
    background: #8B4513;
    border-radius: 10px;
}

.evaporation-drops {
    position: absolute;
    bottom: 40%;
    left: 50%;
    transform: translateX(-50%);
}

.drop {
    position: absolute;
    width: 8px;
    height: 8px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: evaporate 3s infinite;
}

.drop:nth-child(1) {
    left: -20px;
    animation-delay: 0s;
}

.drop:nth-child(2) {
    left: 0;
    animation-delay: 1s;
}

.drop:nth-child(3) {
    left: 20px;
    animation-delay: 2s;
}

.cloud {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 40px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50px;
    animation: cloudFloat 4s ease-in-out infinite;
}

.cloud::before,
.cloud::after {
    content: '';
    position: absolute;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
}

.cloud::before {
    width: 40px;
    height: 40px;
    top: -20px;
    left: 15px;
}

.cloud::after {
    width: 30px;
    height: 30px;
    top: -15px;
    right: 15px;
}

.rain-drops {
    position: absolute;
    top: 70%;
    left: 50%;
    transform: translateX(-50%);
}

.rain {
    position: absolute;
    width: 2px;
    height: 15px;
    background: rgba(255, 255, 255, 0.7);
    animation: rainFall 1.5s infinite;
}

.rain:nth-child(1) {
    left: -15px;
    animation-delay: 0s;
}

.rain:nth-child(2) {
    left: 0;
    animation-delay: 0.5s;
}

.rain:nth-child(3) {
    left: 15px;
    animation-delay: 1s;
}

@keyframes evaporate {
    0% {
        transform: translateY(0);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateY(-200px);
        opacity: 0;
    }
}

@keyframes cloudFloat {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

@keyframes rainFall {
    0% {
        transform: translateY(0);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateY(100px);
        opacity: 0;
    }
}

/* Responsive Design - Mobile First Approach */

/* Tablets and Small Laptops */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-xl);
    }
    
    .hero-visual {
        height: clamp(200px, 35vw, 300px);
        order: -1;
    }
    
    .hero-subtitle {
        max-width: 100%;
    }
    
    .overview-card {
        grid-template-columns: 1fr;
    }
    
    .card-visual {
        min-height: 250px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablets */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: var(--space-2xl) var(--space-xl);
        transition: var(--transition-normal);
        box-shadow: var(--shadow-xl);
        z-index: 999;
        align-items: flex-start;
        justify-content: flex-start;
        padding-top: 80px;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .hamburger {
        display: flex;
        z-index: 1000;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .nav-link {
        font-size: 1.1rem;
        padding: var(--space-sm) var(--space-md);
        width: 100%;
        justify-content: flex-start;
    }
    
    .hero-stats {
        flex-direction: column;
        align-items: center;
        gap: var(--space-lg);
    }
    
    .stat {
        min-width: auto;
        width: 100%;
        max-width: 200px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .stages-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--space-lg);
    }
    
    .stage-image {
        height: 180px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-column h4::after {
        right: 50%;
        transform: translateX(50%);
    }
    
    .contact-info {
        justify-content: center;
    }
    
    .social-icons {
        justify-content: center;
    }
    
    .modal-container {
        width: 95%;
        max-height: 95vh;
    }
    
    .modal-body {
        grid-template-columns: 1fr;
        max-height: calc(95vh - 100px);
    }
}

/* Mobile Phones */
@media (max-width: 480px) {
    :root {
        --space-xs: 0.5rem;
        --space-sm: 0.75rem;
        --space-md: 1rem;
        --space-lg: 1.5rem;
        --space-xl: 2rem;
        --space-2xl: 3rem;
    }
    
    .container {
        padding: 0 var(--space-sm);
    }
    
    .hero {
        padding-top: 70px;
        min-height: 90vh;
    }
    
    .hero-container {
        padding: var(--space-lg) var(--space-sm);
    }
    
    .hero-title {
        font-size: clamp(1.8rem, 7vw, 2.5rem);
    }
    
    .hero-subtitle {
        font-size: 1rem;
        padding: 0 var(--space-sm);
    }
    
    .hero-visual {
        height: 200px;
    }
    
    .section-header {
        margin-bottom: var(--space-xl);
    }
    
    .section-title {
        font-size: clamp(1.3rem, 5vw, 1.8rem);
    }
    
    .section-subtitle {
        font-size: 1rem;
        padding: 0 var(--space-sm);
    }
    
    .overview-card {
        border-radius: var(--radius-lg);
    }
    
    .card-content {
        padding: var(--space-lg);
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
    
    .feature-icon {
        margin: 0 auto;
    }
    
    .stages-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .stage-card {
        max-width: 320px;
        margin: 0 auto;
    }
    
    .stage-info {
        padding: var(--space-lg);
    }
    
    .mission-items {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .mission-item {
        padding: var(--space-lg);
    }
    
    .video-wrapper {
        border-radius: var(--radius-lg);
    }
    
    .footer-grid {
        gap: var(--space-lg);
    }
    
    .footer-column {
        padding: var(--space-sm) 0;
    }
    
    .modal-header {
        padding: var(--space-lg);
    }
    
    .modal-visual,
    .modal-content {
        padding: var(--space-lg);
    }
    
    .modal-image {
        height: 200px;
    }
}

/* Small Mobile Phones */
@media (max-width: 360px) {
    .hero-title {
        font-size: 1.6rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .hero-buttons {
        gap: var(--space-sm);
    }
    
    .btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.9rem;
    }
    
    .stage-card {
        max-width: 280px;
    }
    
    .social-icons {
        justify-content: center;
        gap: var(--space-sm);
    }
    
    .social-icon {
        width: 40px;
        height: 40px;
    }
}

/* Landscape Mode */
@media (max-height: 600px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 100px 0 var(--space-2xl);
    }
    
    .hero-container {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-lg);
    }
    
    .hero-visual {
        height: 250px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
}

/* High DPI Screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero {
        background: var(--gradient-primary);
    }
    
    .logo-icon {
        background: var(--gradient-primary);
    }
}

/* Print Styles */
@media print {
    .navbar,
    .hero-buttons,
    .video-section,
    .site-footer,
    .modal {
        display: none;
    }
    
    .hero {
        min-height: auto;
        background: none;
        color: var(--text);
        padding-top: 0;
    }
    
    .hero-title {
        color: var(--text);
    }
    
    body {
        background: white;
        color: black;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    img {
        max-width: 100% !important;
        height: auto !important;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .nav-link:hover {
        background: transparent;
    }
    
    .btn:hover {
        transform: none;
    }
    
    .stage-card:hover {
        transform: none;
    }
    
    .feature-item:hover {
        transform: none;
    }
    
    .mission-item:hover {
        transform: none;
    }
    
    .social-icon:hover {
        transform: none;
    }
    
    /* Increase touch targets */
    .nav-link,
    .btn,
    .stage-btn,
    .modal-close,
    .social-icon {
        min-height: 44px;
        min-width: 44px;
    }
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0;
}

.mt-0 {
    margin-top: 0;
}

/* Loading Optimizations */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
    opacity: 1;
}