/* ==========================================================================
   GreenVolt Energi - Modern & Professional Stylesheet
   ========================================================================== */

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

:root {
    /* Primary Colors */
    --primary-color: #00B050;
    --primary-dark: #008F3D;
    --primary-light: #00D968;
    
    /* Secondary Colors */
    --secondary-color: #0066CC;
    --secondary-dark: #004C99;
    
    /* Neutral Colors */
    --dark: #1A1A1A;
    --dark-gray: #2D2D2D;
    --gray: #666666;
    --light-gray: #E5E5E5;
    --white: #FFFFFF;
    
    /* Accent Colors */
    --accent-yellow: #FFB800;
    --accent-blue: #00A8E8;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #00B050 0%, #00D968 100%);
    --gradient-secondary: linear-gradient(135deg, #0066CC 0%, #00A8E8 100%);
    --gradient-dark: linear-gradient(135deg, #1A1A1A 0%, #2D2D2D 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

/* ========== Navigation ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--dark);
    position: relative;
    padding: 8px 0;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.cta-button {
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition-base);
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><path d="M0,150 Q300,50 600,150 T1200,150 L1200,600 L0,600 Z" fill="%2300B050" opacity="0.1"/></svg>') no-repeat center;
    background-size: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 176, 80, 0.15) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease;
}

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

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

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

.hero-subtitle {
    font-size: 20px;
    font-weight: 400;
    line-height: 1.6;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition-base);
    cursor: pointer;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

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

.stat-item h3 {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-item p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 24px;
    color: var(--white);
}

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

/* ========== Section Styles ========== */
section {
    position: relative;
    padding: 100px 0;
    z-index: 10;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(0, 176, 80, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--dark);
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
}

/* ========== About Section ========== */
.about {
    position: relative;
    background: linear-gradient(180deg, var(--white) 0%, #F8F9FA 100%);
    z-index: 10;
}

.about-text-intro {
    max-width: 900px;
    margin: 0 auto 60px;
    text-align: center;
}

.about-description {
    font-size: 17px;
    line-height: 1.8;
    color: var(--gray);
    margin-bottom: 20px;
    text-align: justify;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.about-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    text-align: center;
}

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

.about-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-icon i {
    font-size: 36px;
    color: var(--white);
}

.about-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--dark);
}

.about-card p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray);
}

.mission-list {
    list-style: none;
    text-align: left;
    padding: 0;
}

.mission-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
    font-size: 15px;
    line-height: 1.6;
    color: var(--dark);
}

.mission-list li i {
    font-size: 18px;
    color: var(--primary-color);
    margin-top: 2px;
    flex-shrink: 0;
}

/* ========== Voltron Section ========== */
.voltron {
    background: var(--white);
}

.voltron-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
    padding: 40px;
    background: linear-gradient(135deg, #F8F9FA 0%, #FFFFFF 100%);
    border-radius: 20px;
}

.voltron-hero-content h3 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--dark);
}

.voltron-hero-content p {
    font-size: 18px;
    line-height: 1.7;
    color: var(--gray);
    margin-bottom: 32px;
}

.voltron-features-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.feature-item i {
    font-size: 24px;
    color: var(--primary-color);
}

.feature-item span {
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
}

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

.image-card {
    width: 300px;
    height: 300px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.image-card i {
    font-size: 120px;
    color: var(--white);
}

.subsection-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    color: var(--dark);
}

.voltron-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.voltron-card {
    position: relative;
    background: var(--white);
    border: 2px solid var(--light-gray);
    border-radius: 20px;
    padding: 40px 32px;
    transition: var(--transition-base);
}

.voltron-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.voltron-card.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.voltron-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 20px;
}

.voltron-card h4 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark);
}

.voltron-specs {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.spec {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: #F8F9FA;
    border-radius: 8px;
}

.spec i {
    font-size: 18px;
    color: var(--primary-color);
}

.spec span {
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
}

.voltron-card > p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--gray);
    margin-bottom: 24px;
}

.voltron-features {
    list-style: none;
    margin-bottom: 32px;
}

.voltron-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 15px;
    color: var(--dark);
}

.voltron-features li i {
    font-size: 16px;
    color: var(--primary-color);
}

.btn-voltron {
    display: block;
    text-align: center;
    padding: 14px 24px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 10px;
    font-weight: 600;
    transition: var(--transition-base);
}

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

.voltron-cta {
    background: var(--gradient-primary);
    border-radius: 20px;
    padding: 60px 40px;
    text-align: center;
    box-shadow: var(--shadow-xl);
}

.cta-content h3 {
    font-size: 36px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}

.cta-content .btn-primary {
    background: var(--white);
    color: var(--primary-color);
}

.cta-content .btn-primary:hover {
    background: var(--light-gray);
}

/* ========== Vehicles Section ========== */
.vehicles {
    background: linear-gradient(180deg, #F8F9FA 0%, var(--white) 100%);
}

.vehicles-showcase {
    margin-bottom: 60px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.vehicles-showcase img {
    width: 100%;
    height: auto;
    display: block;
}

.vehicles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-bottom: 80px;
}

.vehicle-card {
    background: var(--white);
    border-radius: 16px;
    padding: 0;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    overflow: hidden;
}

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

.vehicle-image {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: linear-gradient(135deg, #F8F9FA 0%, #E5E5E5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.vehicle-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition-base);
}

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

.vehicle-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.vehicle-icon i {
    font-size: 40px;
    color: var(--white);
}

.vehicle-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
    padding: 0 24px;
    margin-top: 24px;
}

.vehicle-card > p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--gray);
    margin-bottom: 20px;
    padding: 0 24px;
}

.vehicle-features {
    list-style: none;
    margin-bottom: 24px;
    padding: 0 24px;
}

.vehicle-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--dark);
}

.vehicle-features li i {
    font-size: 16px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.vehicle-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 15px;
    padding: 0 24px 24px 24px;
}

.vehicle-link:hover {
    gap: 12px;
}

.vehicle-types {
    background: var(--white);
    padding: 60px 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.type-item {
    text-align: center;
    padding: 32px 20px;
    background: #F8F9FA;
    border-radius: 16px;
    transition: var(--transition-base);
}

.type-item:hover {
    background: var(--primary-color);
    transform: translateY(-5px);
}

.type-item:hover .type-icon,
.type-item:hover h4,
.type-item:hover p {
    color: var(--white);
}

.type-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 16px;
    transition: var(--transition-base);
}

.type-item h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--dark);
    transition: var(--transition-base);
}

.type-item p {
    font-size: 14px;
    color: var(--gray);
    transition: var(--transition-base);
}

/* ========== Services Section ========== */
.services {
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.service-card {
    position: relative;
    background: #F8F9FA;
    border-radius: 16px;
    padding: 40px 32px;
    transition: var(--transition-base);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition-base);
}

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

.service-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.service-number {
    font-size: 48px;
    font-weight: 800;
    color: rgba(0, 176, 80, 0.1);
    position: absolute;
    top: 20px;
    right: 20px;
}

.service-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.service-icon i {
    font-size: 32px;
    color: var(--white);
}

.service-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--dark);
}

.service-card p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--gray);
}

/* ========== Why Us Section ========== */
.why-us {
    background: linear-gradient(135deg, #F8F9FA 0%, var(--white) 100%);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.why-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

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

.why-card i {
    font-size: 56px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.why-card h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
}

.why-card p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--gray);
}

/* ========== Contact Section ========== */
.contact {
    background: var(--white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.contact-info h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--dark);
}

.contact-info > p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray);
    margin-bottom: 40px;
}

.contact-details {
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--light-gray);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item i {
    font-size: 24px;
    color: var(--primary-color);
    margin-top: 4px;
}

.contact-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--dark);
}

.contact-item p {
    font-size: 15px;
    color: var(--gray);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    transition: var(--transition-base);
}

.social-link:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.contact-form-wrapper {
    background: #F8F9FA;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--light-gray);
    border-radius: 10px;
    font-family: var(--font-primary);
    font-size: 15px;
    transition: var(--transition-base);
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group label {
    position: absolute;
    top: 16px;
    left: 16px;
    font-size: 15px;
    color: var(--gray);
    pointer-events: none;
    transition: var(--transition-base);
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label,
.form-group select:focus + label,
.form-group select:valid + label {
    top: -10px;
    left: 12px;
    font-size: 12px;
    background: #F8F9FA;
    padding: 0 8px;
    color: var(--primary-color);
}

.btn-submit {
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    padding: 16px 32px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: var(--transition-base);
}

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

/* ========== Footer ========== */
.footer {
    background: var(--gradient-dark);
    color: var(--white);
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo img {
    height: 150px;
    margin-bottom: 20px;
}

.footer-col p {
    font-size: 15px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.7);
}

.footer-col h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
}

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

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    transition: var(--transition-base);
}

.footer-col ul li a:hover {
    color: var(--primary-color);
    padding-left: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

/* ========== Back to Top Button ========== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
}

/* ========== Responsive Design ========== */
@media (max-width: 1024px) {
    .voltron-hero {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--white);
        flex-direction: column;
        padding: 40px;
        box-shadow: var(--shadow-lg);
        transition: var(--transition-base);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .cta-button {
        display: none;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .voltron-grid,
    .vehicles-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .voltron-features-list {
        grid-template-columns: 1fr;
    }
    
    .vehicle-image {
        height: 180px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    section {
        padding: 60px 0;
    }
}