/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(15px);
    z-index: 1000;
    padding: 0.8rem 0;
    transition: all 0.4s ease;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    padding: 0.5rem 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo i {
    font-size: 2rem;
    color: #4CAF50;
    animation: rotate 3s linear infinite;
}

.nav-logo h2 {
    color: #2c5530;
    font-weight: 700;
    font-size: 1.8rem;
    background: linear-gradient(135deg, #2c5530, #4CAF50);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
}

.nav-logo:hover h2 {
    transform: scale(1.05);
}

.nav-logo:hover i {
    animation: rotate 1s linear infinite;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(76, 175, 80, 0.1), transparent);
    transition: left 0.5s ease;
}

.nav-menu a:hover::before {
    left: 100%;
}

.nav-menu a:hover {
    color: #4CAF50;
    background: rgba(76, 175, 80, 0.1);
    transform: translateY(-2px);
}

.nav-menu a.active {
    color: #4CAF50;
    background: rgba(76, 175, 80, 0.15);
    font-weight: 600;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.hamburger:hover {
    background: rgba(76, 175, 80, 0.1);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(15px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        gap: 1.5rem;
        transition: left 0.4s ease;
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu a {
        font-size: 1.1rem;
        padding: 1rem 2rem;
        width: 80%;
        text-align: center;
        border-radius: 15px;
    }

    .hamburger {
        display: flex;
    }

    .nav-container {
        padding: 0 1.5rem;
    }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Slides */
.slide {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 0;
    position: relative;
}

/* Section Titles */
.section-title {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #2c5530;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #4CAF50, #8BC34A);
    border-radius: 2px;
}

/* Hero Section */
#intro {
    position: relative;
    height: 100vh;
    color: white;
    text-align: center;
    overflow: hidden;
}

/* Full Screen Logo Background */
.logo-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 1;
}

.fullscreen-logo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Content Overlay */
.hero-overlay {
    position: relative;
    z-index: 2;
    background: rgba(0, 0, 0, 0.4);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    max-width: 800px;
    animation: fadeInUp 1s ease 0.5s both;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.tagline {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #4CAF50;
    animation: fadeInUp 1s ease 0.4s both;
}

.tagline-hindi {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    opacity: 0.8;
    animation: fadeInUp 1s ease 0.6s both;
}

/* Waste Machine Section */
.waste-machine-section {
    background: linear-gradient(135deg, #56a95a 0%, #338334 100%);
    padding: 4rem 0;
    position: relative;
    z-index: 3;
}

.machine-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: white;
    position: relative;
}

.machine-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #4CAF50, #8BC34A);
    border-radius: 2px;
}

/* Waste Machine Image */
.waste-machine-image {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.machine-diagram {
    width: 100%;
    height: auto;
    max-height: 800px;
    object-fit: contain;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    transition: transform 0.3s ease;
}

.machine-diagram:hover {
    transform: scale(1.02);
}

/* Hero Animation */
.hero-animation {
    margin-top: 3rem;
    animation: fadeInUp 1s ease 0.8s both;
}

.waste-machine {
    width: 600px;
    height: 700px;
    margin: 0 auto;
    position: relative;
}

.machine-body {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #2c3e50, #34495e);
    border-radius: 20px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    overflow: visible;
    display: grid;
    grid-template-rows: 140px 1fr 120px;
}

/* Top Section - Waste Input */
.input-section {
    padding: 15px;
}

.input-chambers {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    height: 100%;
    padding: 15px;
}

.wet-waste-chamber, .dry-waste-chamber {
    flex: 1;
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
    position: relative;
    overflow: hidden;
    padding: 15px;
    border: 2px solid rgba(255,255,255,0.2);
    min-height: 100px;
}

.wet-waste-chamber h4, .dry-waste-chamber h4 {
    color: white;
    font-size: 0.8rem;
    margin-bottom: 5px;
    text-align: center;
    font-weight: 600;
}

.waste-particles {
    position: absolute;
    width: 100%;
    height: 80%;
    bottom: 0;
    left: 0;
    animation: particleFlow 3s infinite linear;
}

.waste-particles.brown {
    background: radial-gradient(circle, #8D6E63 4px, transparent 4px);
    background-size: 20px 20px;
}

.waste-particles.colorful {
    background: 
        radial-gradient(circle, #2196F3 4px, transparent 4px),
        radial-gradient(circle, #FF9800 4px, transparent 4px),
        radial-gradient(circle, #4CAF50 4px, transparent 4px),
        radial-gradient(circle, #9C27B0 4px, transparent 4px);
    background-size: 25px 25px, 30px 30px, 22px 22px, 28px 28px;
    background-position: 0 0, 12px 12px, 6px 6px, 18px 18px;
}

/* Middle Section - Processing Chambers */
.processing-section {
    position: relative;
    padding: 20px;
}

.inner-refractory {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #D2691E, #CD853F);
    border-radius: 15px;
    position: relative;
    border: 3px solid #8B4513;
}

.refractory-label {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-size: 0.8rem;
    font-weight: 600;
    text-align: center;
    background: rgba(0,0,0,0.3);
    padding: 5px 10px;
    border-radius: 5px;
    z-index: 5;
}

.burning-chamber {
    width: 85%;
    height: 75%;
    background: linear-gradient(90deg, #e74c3c, #f39c12);
    margin: 30px auto 20px;
    border-radius: 15px;
    position: relative;
    overflow: hidden;
    border: 2px solid #c0392b;
}

.burning-chamber h4 {
    color: white;
    font-size: 0.8rem;
    margin: 10px;
    text-align: center;
    font-weight: 600;
}

.heating-coils {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 95%;
    height: 80%;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
}

.coil {
    width: 100%;
    height: 10px;
    background: linear-gradient(90deg, #FFD700, #FFA500);
    border-radius: 5px;
    animation: glow 2s infinite alternate;
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.9);
}

.air-pipe {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 60px;
    height: 40px;
}

.pipe-line {
    width: 100%;
    height: 8px;
    background: #666;
    border-radius: 4px;
    position: relative;
}

.pipe-line::after {
    content: '';
    position: absolute;
    right: -20px;
    top: -4px;
    width: 20px;
    height: 16px;
    background: #666;
    border-radius: 8px;
}

/* Bottom Section - Byproduct Collection */
.output-section {
    padding: 15px;
}

.collection-trays {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    height: 100%;
    padding: 15px;
}

.compost-tray, .ash-tray {
    flex: 1;
    background: rgba(255,255,255,0.2);
    border-radius: 8px;
    border: 2px dashed rgba(255,255,255,0.5);
    padding: 15px;
    position: relative;
    min-height: 80px;
}

.compost-tray h4, .ash-tray h4 {
    color: white;
    font-size: 0.7rem;
    margin-bottom: 5px;
    text-align: center;
    font-weight: 600;
}

.tray-content {
    width: 100%;
    height: 70%;
    border-radius: 4px;
    position: relative;
}

.tray-content.brown {
    background: linear-gradient(45deg, #8D6E63, #A1887F);
}

.tray-content.grey {
    background: linear-gradient(45deg, #757575, #9E9E9E);
}

/* Right Side - Air Filtration System */
.filtration-system {
    position: absolute;
    right: -130px;
    top: 0;
    width: 110px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 25px 0;
    z-index: 10;
}

.filter-unit {
    width: 100%;
    height: 90px;
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
    border: 2px solid rgba(255,255,255,0.3);
    padding: 10px;
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    backdrop-filter: blur(5px);
}

.filter-unit h4 {
    color: white;
    font-size: 0.6rem;
    text-align: center;
    font-weight: 600;
    line-height: 1.2;
}

.cyclone-filter {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.hepa-filter {
    background: linear-gradient(135deg, #27ae60, #229954);
}

.scrubber {
    background: linear-gradient(135deg, #e67e22, #d35400);
}

.clean-air-output {
    position: relative;
    text-align: center;
}

.air-flow {
    width: 60px;
    height: 8px;
    background: linear-gradient(90deg, #4CAF50, #8BC34A);
    border-radius: 4px;
    margin: 0 auto 5px;
    position: relative;
    animation: airFlow 2s infinite;
}

.air-flow::after {
    content: '→';
    position: absolute;
    right: -15px;
    top: -5px;
    color: #4CAF50;
    font-size: 1.2rem;
    font-weight: bold;
}

.clean-air-output h4 {
    color: #4CAF50;
    font-size: 0.7rem;
    font-weight: 600;
    margin: 0;
}

/* Problem Section */
#problem {
    background: #f8f9fa;
}

.problem-content {
    display: grid;
    grid-template-columns: fr 3fr;
    gap: 5rem;
    align-items: center;
}

.problem-visual {
    position: relative;
    height: 600px;
}

.problem-images {
    width: 100%;
    height: 100%;
    position: relative;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 2rem;
    height: 100%;
    padding: rem;
    aspect-ratio: 16/9;
}

.image-item {
    position: relative;
    border-radius: 1px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
}

.image-item.floating {
    animation: float 6s ease-in-out infinite;
}

.image-item.floating:nth-child(1) { animation-delay: 0s; }
.image-item.floating:nth-child(2) { animation-delay: 1s; }
.image-item.floating:nth-child(3) { animation-delay: 2s; }
.image-item.floating:nth-child(4) { animation-delay: 0.5s; }
.image-item.floating:nth-child(5) { animation-delay: 1.5s; }
.image-item.floating:nth-child(6) { animation-delay: 2.5s; }

.image-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}

.image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease;
    border-radius: 20px;
    aspect-ratio: 16/9;
}

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

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: white;
    padding: 1rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.image-item:hover .image-overlay {
    transform: translateY(0);
}

.image-overlay span {
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    display: block;
}



.cloud:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; }
.cloud:nth-child(2) { top: 40%; left: 60%; animation-delay: 2s; }
.cloud:nth-child(3) { top: 60%; left: 30%; animation-delay: 4s; }

.problem-text {
    display: grid;
    gap: 2rem;
}

.problem-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-5px);
}

.problem-card i {
    font-size: 2.5rem;
    color: #e74c3c;
    margin-bottom: 1rem;
}

.problem-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2c5530;
}

/* Solutions Section */
#solutions {
    background: white;
}

.solutions-content {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 2rem;
    flex-wrap: wrap;
}

.solution-card {
    flex: 1;
    min-width: 250px;
    max-width: 300px;
}

.solution-card {
    background: #fff5f5;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    border-left: 5px solid #e74c3c;
    transition: transform 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-5px);
}

.solution-icon {
    width: 80px;
    height: 80px;
    background: #e74c3c;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.solution-icon i {
    font-size: 2rem;
    color: white;
}

.solution-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #2c5530;
}

/* Model Section */
#model {
    background: linear-gradient(135deg, #4dc557 0%, #2dac42 100%);
    color: white;
}

.model-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

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

.dual-chamber-dustbin {
    width: 400px;
    height: 500px;
    margin: 0 auto;
    background: linear-gradient(145deg, #34495e, #2c3e50);
    border-radius: 20px;
    padding: 2rem;
    position: relative;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.chamber {
    width: 100%;
    height: 45%;
    background: rgba(255,255,255,0.1);
    border-radius: 15px;
    margin-bottom: 2rem;
    padding: 1rem;
    position: relative;
    overflow: hidden;
}

.chamber h3 {
    text-align: center;
    margin-bottom: 1rem;
    color: #4CAF50;
}

.waste-flow {
    height: 60%;
    position: relative;
    overflow: hidden;
}

.waste-particle {
    position: absolute;
    width: 15px;
    height: 15px;
    background: #8BC34A;
    border-radius: 50%;
    animation: flowDown 2s infinite linear;
}

.waste-particle:nth-child(1) { left: 20%; animation-delay: 0s; }
.waste-particle:nth-child(2) { left: 50%; animation-delay: 0.7s; }
.waste-particle:nth-child(3) { left: 80%; animation-delay: 1.4s; }

.output {
    text-align: center;
    font-weight: 600;
    color: #4CAF50;
}

.model-features {
    display: grid;
    gap: 2rem;
}

.feature {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.feature i {
    font-size: 2.5rem;
    color: #4CAF50;
    margin-bottom: 1rem;
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* How It Works Section */
#how-it-works {
    background: #f8f9fa;
}

.process-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: nowrap;
}

.step {
    flex: 1;
    min-width: 200px;
    max-width: 250px;
}

.step {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    flex: 1;
    min-width: 200px;
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateY(-5px);
}

.step-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #4CAF50, #8BC34A);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.step-icon i {
    font-size: 2rem;
    color: white;
}

.step h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #2c5530;
}

.step-arrow {
    font-size: 2rem;
    color: #4CAF50;
    animation: pulse 2s infinite;
}

/* Uniqueness Section */
#uniqueness {
    background: white;
}

.uniqueness-content {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 3rem;
    flex-wrap: wrap;
}

.unique-feature {
    flex: 1;
    min-width: 300px;
    max-width: 350px;
}

.unique-feature {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 20px;
    transition: transform 0.3s ease;
}

.unique-feature:hover {
    transform: translateY(-10px);
}

.feature-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #4CAF50, #8BC34A);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    box-shadow: 0 10px 30px rgba(76, 175, 80, 0.3);
}

.feature-icon i {
    font-size: 3rem;
    color: white;
}

.unique-feature h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #2c5530;
}

/* Benefits Section */
#benefits {
    background: linear-gradient(135deg, #5fee8f 0%, #2f8d47 100%);
    color: white;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.benefit-card {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-5px);
}

.benefit-card i {
    font-size: 3rem;
    color: #4CAF50;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Audience Section */
#audience {
    background: #f8f9fa;
}

.audience-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.audience-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.audience-card:hover {
    transform: translateY(-10px);
}

.audience-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #4CAF50, #8BC34A);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
}

.audience-icon i {
    font-size: 3rem;
    color: white;
}

.audience-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #2c5530;
}

/* Contact Section */
#contact {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    gap: 2rem;
    margin: 3rem 0;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    font-size: 1.2rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: #4CAF50;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

.social-link {
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #4CAF50;
    transform: translateY(-5px);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes particleFlow {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

@keyframes glow {
    from { opacity: 0.5; }
    to { opacity: 1; }
}

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

@keyframes float {
    0%, 100% { 
        transform: translateY(0) rotate(0deg); 
        box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    }
    25% { 
        transform: translateY(-15px) rotate(1deg); 
        box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    }
    50% { 
        transform: translateY(-25px) rotate(0deg); 
        box-shadow: 0 25px 50px rgba(0,0,0,0.4);
    }
    75% { 
        transform: translateY(-15px) rotate(-1deg); 
        box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    }
}

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

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

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes airFlow {
    0% { transform: scaleX(1); opacity: 0.7; }
    50% { transform: scaleX(1.2); opacity: 1; }
    100% { transform: scaleX(1); opacity: 0.7; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .machine-title {
        font-size: 2rem;
    }
    
    .waste-machine-section {
        padding: 3rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .problem-content,
    .model-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .problem-visual {
        height: 400px;
    }
    
    .image-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, 1fr);
        gap: 0.8rem;
    }
    
    .solutions-content {
        flex-direction: column;
        align-items: center;
    }
    
    .solution-card {
        min-width: 280px;
        max-width: 350px;
    }
    
    .process-flow {
        flex-direction: column;
        flex-wrap: wrap;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .step {
        min-width: 280px;
        max-width: 350px;
    }
    
    .uniqueness-content {
        flex-direction: column;
        align-items: center;
    }
    
    .unique-feature {
        min-width: 280px;
        max-width: 350px;
    }
    
    .dual-chamber-dustbin {
        width: 300px;
        height: 400px;
    }
    
    .waste-machine-image {
        max-width: 600px;
    }
    
    .machine-diagram {
        max-height: 450px;
    }
    
    .filtration-system {
        right: -80px;
        width: 70px;
        z-index: 10;
    }
    
    .filter-unit h4 {
        font-size: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .machine-title {
        font-size: 1.8rem;
    }
    
    .waste-machine-section {
        padding: 2rem 0;
    }
    
    .tagline {
        font-size: 1.5rem;
    }
    
    .dual-chamber-dustbin {
        width: 250px;
        height: 350px;
    }
    
    .waste-machine-image {
        max-width: 400px;
    }
    
    .machine-diagram {
        max-height: 350px;
    }
    
    .problem-visual {
        height: 350px;
    }
    
    .image-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(6, 1fr);
        gap: 0.5rem;
        padding: 0.5rem;
    }
    
    .filtration-system {
        right: -60px;
        width: 50px;
        z-index: 10;
    }
    
    .filter-unit {
        height: 60px;
    }
    
    .filter-unit h4 {
        font-size: 0.4rem;
    }
}