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

/* Mobile-specific improvements */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    body {
        -webkit-text-size-adjust: 100%;
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }
    
    /* Improve touch targets */
    .btn, .nav-menu a, .service-card, .contact-item {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Better scrolling */
    .hero, section {
        scroll-margin-top: 80px;
    }
    
    /* Prevent text selection on interactive elements */
    .btn, .nav-menu a, .service-card {
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
    }
    
    /* Improve form inputs on mobile */
    input, select, textarea {
        font-size: 16px !important; /* Prevents zoom on iOS */
    }
    
    /* Increase overall spacing for mobile */
    .container {
        padding: 0 25px;
    }
    
    /* Increase section padding */
    .hero, .services, .engineering, .recycling, .about, .contact {
        padding: 80px 0;
    }
    
    /* Better hero spacing */
    .hero-content {
        padding: 3rem 0;
        gap: 3rem;
    }
    
    /* Increase card padding */
    .service-card {
        padding: 2.5rem;
        margin-bottom: 1rem;
    }
    
    /* Better button spacing */
    .hero-buttons {
        gap: 1.5rem;
    }
    
    .btn {
        padding: 16px 32px;
        font-size: 1.1rem;
        margin: 0.5rem 0;
    }
    
    /* Improve section headers */
    .section-header {
        margin-bottom: 3rem;
        padding: 0 1rem;
    }
    
    /* Services section specific improvements */
    .services .section-header {
        margin-bottom: 4rem;
    }
    
    .services .section-header h2 {
        font-size: 2.4rem;
        margin-bottom: 1.5rem;
        background: var(--gradient-primary);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    
    .services .section-header p {
        font-size: 1.1rem;
        color: var(--gray);
        max-width: 500px;
        margin: 0 auto;
        line-height: 1.6;
    }
    
    /* Add subtle background pattern to services section */
    .services {
        background: linear-gradient(135deg, var(--light-gray) 0%, #f0f4f8 100%);
        position: relative;
    }
    
    .services::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-image: 
            radial-gradient(circle at 20% 80%, rgba(0, 102, 204, 0.03) 0%, transparent 50%),
            radial-gradient(circle at 80% 20%, rgba(0, 153, 255, 0.03) 0%, transparent 50%);
        pointer-events: none;
    }
    
    .services .container {
        position: relative;
        z-index: 1;
    }
    
    .section-header h2 {
        margin-bottom: 1.5rem;
    }
    
    /* Better feature spacing */
    .feature-item {
        margin-bottom: 3rem;
        gap: 1.5rem;
    }
    
    /* Improve stats spacing */
    .stat-item {
        padding: 2.5rem 1.5rem;
        margin-bottom: 1rem;
    }
    
    /* Better process steps */
    .process-step {
        padding: 2.5rem 1.5rem;
        margin-bottom: 1rem;
    }
    
    /* Improve contact form */
    .contact-form {
        padding: 3rem 2rem;
    }
    
    .form-group {
        margin-bottom: 2rem;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 1.2rem;
        margin-bottom: 0.5rem;
    }
    
    /* Better contact info spacing */
    .contact-item {
        padding: 2rem 1.5rem;
        margin-bottom: 1rem;
        gap: 1.5rem;
    }
    
    /* Improve about section */
    .about-text {
        padding: 0 1rem;
    }
    
    .about-text p {
        margin-bottom: 2rem;
    }
    
    .about-stats {
        gap: 2rem;
        margin: 3rem 0;
    }
    
    .about-stat {
        padding: 2rem 1.5rem;
    }
    
    .about-features {
        gap: 1.5rem;
        margin-top: 3rem;
    }
    
    .about-feature {
        padding: 1.5rem;
        gap: 1.5rem;
    }
    
    /* Better footer spacing */
    .footer {
        padding: 80px 0 30px;
    }
    
    .footer-content {
        gap: 3rem;
        margin-bottom: 3rem;
    }
    
    .footer-section {
        padding: 0 1rem;
    }
    
    /* Improve navigation menu spacing */
    .nav-menu {
        padding: 3rem 2rem;
    }
    
    .nav-menu li {
        margin: 1.5rem 0;
    }
    
    .nav-menu a {
        padding: 1.2rem 0;
        font-size: 1.3rem;
    }
}

:root {
    --primary-blue: #0066cc;
    --secondary-blue: #004499;
    --accent-blue: #0099ff;
    --light-blue: #e6f3ff;
    --dark-blue: #002244;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --gray: #6c757d;
    --dark-gray: #343a40;
    --gradient-primary: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    --gradient-secondary: linear-gradient(135deg, var(--secondary-blue), var(--primary-blue));
    --shadow-light: 0 2px 10px rgba(0, 102, 204, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 102, 204, 0.15);
    --shadow-heavy: 0 8px 30px rgba(0, 102, 204, 0.2);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 102, 204, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.nav-logo i {
    margin-right: 8px;
    font-size: 1.8rem;
    color: var(--primary-blue);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-menu a:hover {
    color: var(--primary-blue);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    margin: 3px 0;
    transition: var(--transition);
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 2rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        box-shadow: 0 4px 20px rgba(0, 102, 204, 0.1);
        justify-content: flex-start;
        align-items: center;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        margin: 1rem 0;
        width: 100%;
        text-align: center;
    }
    
    .nav-menu a {
        font-size: 1.2rem;
        padding: 1rem 0;
        display: block;
        width: 100%;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, var(--white) 0%, var(--light-blue) 100%);
    overflow: hidden;
    padding-top: 70px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0, 102, 204, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 153, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 68, 153, 0.05) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: calc(100vh - 70px);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--dark-blue);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    min-height: 44px;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.battery-animation {
    position: relative;
    width: 400px;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.recycling-cycle {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Battery Pack */
.battery-pack {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: packGlow 4s ease-in-out infinite;
}

.battery-cells {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding: 15px;
    background: var(--white);
    border: 3px solid var(--primary-blue);
    border-radius: 12px;
    box-shadow: var(--shadow-medium);
}

.cell {
    width: 25px;
    height: 35px;
    background: var(--gradient-primary);
    border-radius: 4px;
    animation: cellPulse 2s ease-in-out infinite;
}

.cell-1 { animation-delay: 0s; }
.cell-2 { animation-delay: 0.5s; }
.cell-3 { animation-delay: 1s; }
.cell-4 { animation-delay: 1.5s; }

.pack-label {
    margin-top: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-blue);
    text-align: center;
}

/* Recycling Arrow */
.recycle-arrow {
    position: relative;
    font-size: 2rem;
    color: var(--accent-blue);
    animation: rotate 3s linear infinite;
}

/* Materials */
.materials {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
}

.material {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-light);
    animation: materialFloat 3s ease-in-out infinite;
}

.material-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 5px;
}

.lithium .material-icon {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
}

.cobalt .material-icon {
    background: linear-gradient(135deg, #4834d4, #686de0);
}

.nickel .material-icon {
    background: linear-gradient(135deg, #00b894, #00cec9);
}

.material-label {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--gray);
}

/* New Battery */
.new-battery {
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: newBatteryGlow 4s ease-in-out infinite;
}

.battery-outline {
    width: 40px;
    height: 60px;
    border: 3px solid var(--primary-blue);
    border-radius: 8px;
    position: relative;
    background: var(--white);
    box-shadow: var(--shadow-medium);
}

.battery-outline::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 8px;
    background: var(--primary-blue);
    border-radius: 3px 3px 0 0;
}

.battery-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: var(--gradient-primary);
    border-radius: 0 0 5px 5px;
    animation: batteryFill 4s ease-in-out infinite;
}

.battery-label {
    margin-top: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-blue);
    text-align: center;
}

/* Energy Flow */
.energy-flow {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    transform: translateY(-50%);
}

.energy-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-blue);
    border-radius: 50%;
    animation: energyFlow 2s linear infinite;
}

.energy-particle:nth-child(1) {
    animation-delay: 0s;
}

.energy-particle:nth-child(2) {
    animation-delay: 0.7s;
}

.energy-particle:nth-child(3) {
    animation-delay: 1.4s;
}

/* Animations */
@keyframes packGlow {
    0%, 100% { transform: scale(1); filter: brightness(1); }
    50% { transform: scale(1.05); filter: brightness(1.1); }
}

@keyframes cellPulse {
    0%, 100% { opacity: 0.7; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

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

@keyframes materialFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

@keyframes newBatteryGlow {
    0%, 100% { transform: scale(1); filter: brightness(1); }
    50% { transform: scale(1.05); filter: brightness(1.1); }
}

@keyframes batteryFill {
    0% { height: 0%; }
    50% { height: 80%; }
    100% { height: 100%; }
}

@keyframes energyFlow {
    0% { left: 0%; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { left: 100%; opacity: 0; }
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid var(--primary-blue);
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) rotate(45deg); }
    40% { transform: translateY(-10px) rotate(45deg); }
    60% { transform: translateY(-5px) rotate(45deg); }
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

/* Services Section */
.services {
    padding: 100px 0;
    background: var(--light-gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 1px solid rgba(0, 102, 204, 0.1);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.service-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-blue);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--gray);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-card ul {
    list-style: none;
}

.service-card li {
    padding: 0.5rem 0;
    color: var(--gray);
    position: relative;
    padding-left: 1.5rem;
}

.service-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

/* Engineering Section */
.engineering {
    padding: 100px 0;
    background: var(--white);
}

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

.feature-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: var(--light-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 1.2rem;
    color: var(--primary-blue);
}

.feature-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
}

.feature-content p {
    color: var(--gray);
    line-height: 1.6;
}

.engineering-visual {
    display: flex;
    justify-content: center;
}

.tech-diagram {
    width: 300px;
    height: 300px;
    position: relative;
}

.diagram-layer {
    position: relative;
    width: 100%;
    height: 100%;
}

.diagram-element {
    position: absolute;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 1rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    box-shadow: var(--shadow-medium);
    animation: float 6s ease-in-out infinite;
}

.diagram-element:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.diagram-element:nth-child(2) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 2s;
}

.diagram-element:nth-child(3) {
    bottom: 20%;
    right: 10%;
    animation-delay: 4s;
}

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

/* Recycling Section */
.recycling {
    padding: 100px 0;
    background: var(--light-gray);
}

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

.recycling-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--gray);
    font-weight: 500;
}

.recycling-process {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.process-step {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    text-align: center;
    position: relative;
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.process-step h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
}

.process-step p {
    color: var(--gray);
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 100px 0;
    background: var(--white);
}

.about-content {
    display: block;
    max-width: 800px;
    margin: 0 auto;
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 1.5rem;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--gray);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.about-stat {
    text-align: center;
    padding: 1.5rem;
    background: var(--light-blue);
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 102, 204, 0.1);
}

.about-stat .stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.about-stat .stat-label {
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 500;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--light-blue);
    border-radius: var(--border-radius);
}

.about-feature i {
    color: var(--primary-blue);
    font-size: 1.2rem;
}

.about-feature span {
    font-weight: 500;
    color: var(--dark-blue);
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: var(--light-gray);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-top: 0.2rem;
}

.contact-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--gray);
    line-height: 1.6;
}

.contact-form {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid rgba(0, 102, 204, 0.1);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

/* Footer */
.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: 60px 0 20px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-logo i {
    margin-right: 8px;
    font-size: 1.8rem;
    color: var(--accent-blue);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--accent-blue);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-blue);
    transform: translateY(-2px);
}

.newsletter-form {
    display: flex;
    gap: 0.5rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.8rem;
    border: none;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.newsletter-form button {
    padding: 0.8rem 1rem;
    background: var(--primary-blue);
    border: none;
    border-radius: var(--border-radius);
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-form button:hover {
    background: var(--accent-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
        padding: 0 20px;
        min-height: auto;
        padding-top: 3rem;
        padding-bottom: 3rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
        line-height: 1.1;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .battery-animation {
        width: 280px;
        height: 250px;
        margin: 0 auto;
        transform: scale(0.9);
    }
    
    .recycling-cycle {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .battery-cells {
        gap: 6px;
        padding: 12px;
    }
    
    .cell {
        width: 20px;
        height: 28px;
    }
    
    .material {
        padding: 8px;
    }
    
    .material-icon {
        width: 25px;
        height: 25px;
        font-size: 0.7rem;
    }
    
    .battery-outline {
        width: 35px;
        height: 50px;
    }
    
    .engineering-content,
    .recycling-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        padding: 0 1rem;
    }
    
    .service-card {
        padding: 3rem 2.5rem;
        border-radius: 16px;
        box-shadow: 0 8px 32px rgba(0, 102, 204, 0.1);
        border: none;
        position: relative;
        background: linear-gradient(135deg, var(--white) 0%, #f8faff 100%);
        margin-bottom: 1.5rem;
        transition: all 0.3s ease;
    }
    
    .service-card:active {
        transform: scale(0.98);
        box-shadow: 0 4px 16px rgba(0, 102, 204, 0.15);
    }
    
    .service-card::before {
        height: 6px;
        border-radius: 16px 16px 0 0;
    }
    
    .service-icon {
        width: 80px;
        height: 80px;
        margin-bottom: 2.5rem;
        box-shadow: 0 8px 24px rgba(0, 102, 204, 0.2);
    }
    
    .service-icon i {
        font-size: 2rem;
    }
    
    .service-card h3 {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
        color: var(--dark-blue);
        line-height: 1.2;
    }
    
    .service-card p {
        font-size: 1.05rem;
        line-height: 1.7;
        margin-bottom: 2.5rem;
        color: var(--gray);
    }
    
    .service-card ul {
        background: rgba(0, 102, 204, 0.05);
        border-radius: 12px;
        padding: 2rem;
        margin-top: 1.5rem;
    }
    
    .service-card li {
        padding: 1rem 0;
        font-size: 1rem;
        font-weight: 500;
        color: var(--dark-gray);
        line-height: 1.4;
    }
    
    .service-card li::before {
        font-size: 1.2rem;
        color: var(--primary-blue);
        margin-right: 0.5rem;
    }
    
    .recycling-stats {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .recycling-process {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .about-features {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
        padding: 15px 30px;
        font-size: 1.1rem;
    }
    
    .section-header h2 {
        font-size: 2.2rem;
    }
    
    .section-header p {
        font-size: 1rem;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        margin: 0 auto;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .contact-item i {
        margin: 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .newsletter-form {
        flex-direction: column;
        gap: 1rem;
    }
    
    .newsletter-form input {
        width: 100%;
    }
    
    .tech-diagram {
        width: 250px;
        height: 250px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-container {
        padding: 0 20px;
    }
    
    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .hero-subtitle {
        font-size: 0.95rem;
    }
    
    .battery-animation {
        width: 250px;
        height: 220px;
        transform: scale(0.8);
    }
    
    .recycling-cycle {
        gap: 1rem;
    }
    
    .battery-cells {
        gap: 4px;
        padding: 10px;
    }
    
    .cell {
        width: 18px;
        height: 25px;
    }
    
    .recycle-arrow {
        font-size: 1.5rem;
    }
    
    .material-icon {
        width: 22px;
        height: 22px;
        font-size: 0.6rem;
    }
    
    .battery-outline {
        width: 30px;
        height: 45px;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .section-header p {
        font-size: 0.9rem;
    }
    
    .service-card {
        padding: 2.5rem 2rem;
        margin-bottom: 1.5rem;
        border-radius: 14px;
    }
    
    .service-icon {
        width: 70px;
        height: 70px;
        margin-bottom: 2rem;
    }
    
    .service-icon i {
        font-size: 1.7rem;
    }
    
    .service-card h3 {
        font-size: 1.6rem;
        margin-bottom: 1.2rem;
    }
    
    .service-card p {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .service-card ul {
        padding: 1.5rem;
    }
    
    .service-card li {
        padding: 0.8rem 0;
        font-size: 0.95rem;
    }
    
    .service-card h3 {
        font-size: 1.3rem;
    }
    
    .service-card p {
        font-size: 0.9rem;
    }
    
    .service-card li {
        font-size: 0.85rem;
    }
    
    .about-text h2 {
        font-size: 1.8rem;
    }
    
    .about-text p {
        font-size: 1rem;
    }
    
    .about-stat .stat-number {
        font-size: 1.8rem;
    }
    
    .about-stat .stat-label {
        font-size: 0.8rem;
    }
    
    .contact-form {
        padding: 2.5rem 1.5rem;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 0.8rem;
        font-size: 0.9rem;
    }
    
    .btn {
        padding: 14px 28px;
        font-size: 1rem;
        margin: 0.75rem 0;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.85rem;
    }
    
    .process-step h4 {
        font-size: 1.1rem;
    }
    
    .process-step p {
        font-size: 0.85rem;
    }
    
    .tech-diagram {
        width: 200px;
        height: 200px;
    }
}

@media (max-width: 360px) {
    .container {
        padding: 0 18px;
    }
    
    .nav-container {
        padding: 0 18px;
    }
    
    .hero-title {
        font-size: 1.8rem;
        margin-bottom: 2rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
        margin-bottom: 2.5rem;
    }
    
    .battery-animation {
        width: 220px;
        height: 200px;
        transform: scale(0.7);
        margin: 2rem auto;
    }
    
    .section-header h2 {
        font-size: 1.6rem;
        margin-bottom: 2rem;
    }
    
    .section-header {
        margin-bottom: 3.5rem;
    }
    
    .service-card {
        padding: 2rem 1.2rem;
        margin-bottom: 2rem;
        border-radius: 12px;
    }
    
    .service-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 1.5rem;
    }
    
    .service-icon i {
        font-size: 1.4rem;
    }
    
    .service-card h3 {
        font-size: 1.4rem;
        margin-bottom: 1rem;
    }
    
    .service-card p {
        font-size: 0.9rem;
        margin-bottom: 1.5rem;
    }
    
    .service-card ul {
        padding: 1rem;
    }
    
    .service-card li {
        padding: 0.5rem 0;
        font-size: 0.85rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
        margin: 0.75rem 0;
    }
    
    .tech-diagram {
        width: 180px;
        height: 180px;
    }
    
    .hero-content {
        padding: 2.5rem 0;
        gap: 3rem;
    }
    
    .feature-item {
        margin-bottom: 2.5rem;
    }
    
    .stat-item {
        padding: 2rem 1rem;
        margin-bottom: 1.5rem;
    }
    
    .process-step {
        padding: 2rem 1rem;
        margin-bottom: 1.5rem;
    }
    
    .contact-form {
        padding: 2rem 1rem;
    }
    
    .contact-item {
        padding: 1.8rem 1rem;
        margin-bottom: 1.5rem;
    }
}