/* CSS Variables */
:root {
    --primary-dark: #0a0a0a;
    --secondary-dark: #1a1a1a;
    --accent-dark: #2a2a2a;
    --neon-orange: #ff6b00;
    --neon-orange-glow: rgba(255, 107, 0, 0.3);
    --neon-orange-light: rgba(255, 107, 0, 0.1);
    --text-light: #ffffff;
    --text-gray: #cccccc;
    --text-muted: #888888;
    --border-color: #3a3a3a;
    --success: #00ff88;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--primary-dark);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-light), var(--neon-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
}

/* Logo Classes - Reusable branding elements */
.logo-icon {
    width: 50px;
    height: 50px;
    background: url('../images/EVIcon.svg') no-repeat center;
    background-size: contain;
    transition: var(--transition);
}

.logo-icon:hover {
    filter: drop-shadow(0 0 10px var(--neon-orange-glow));
}

.logo-text {
    width: 200px;
    height: 40px;
    background: url('../images/EVConcreteLetters_ForDarkBG.svg') no-repeat center;
    background-size: contain;
    transition: var(--transition);
}

.logo-text:hover {
    filter: drop-shadow(0 0 10px var(--neon-orange-glow));
}

.logo-text-large {
    width: 250px;
    height: 50px;
    background: url('../images/EVConcreteLetters_ForDarkBG.svg') no-repeat center;
    background-size: contain;
}

.hero-logo-text {
    width: 350px;
    height: 80px;
    background: url('../images/EVConcreteLetters_ForDarkBG.svg') no-repeat center;
    background-size: contain;
    margin: 0 auto 2rem;
    animation: logoGlow 3s ease-in-out infinite alternate;
}

@keyframes logoGlow {
    0% { filter: drop-shadow(0 0 20px var(--neon-orange-glow)); }
    100% { filter: drop-shadow(0 0 40px var(--neon-orange)); }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    padding: 1rem 0;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: 0 2px 20px var(--neon-orange-light);
    padding: 0.75rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 1rem;
}

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

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-light);
    margin: 3px 0;
    transition: var(--transition);
}

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

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--neon-orange);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--neon-orange);
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 80%, var(--neon-orange-light) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--neon-orange-light) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 107, 0, 0.05) 0%, transparent 50%);
    animation: backgroundShift 20s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.hero-content {
    text-align: center;
    z-index: 1;
    max-width: 800px;
    padding: 0 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease-out 0.3s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    animation: fadeInUp 1s ease-out 0.6s both;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--neon-orange), #ff8533);
    color: var(--text-light);
    box-shadow: 0 4px 15px var(--neon-orange-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--neon-orange-glow);
}

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

.btn-secondary:hover {
    background: var(--neon-orange);
    color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-expand {
    background: transparent;
    color: var(--neon-orange);
    border: 1px solid var(--neon-orange);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-top: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-expand:hover {
    background: var(--neon-orange);
    color: var(--primary-dark);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
    text-decoration: none;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}

.scroll-indicator:hover {
    color: var(--neon-orange);
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border-right: 2px solid var(--neon-orange);
    border-bottom: 2px solid var(--neon-orange);
    transform: rotate(45deg);
    margin: 0.5rem auto 0;
}

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

/* Services Section */
.services {
    background: var(--secondary-dark);
}

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

.service-card {
    background: var(--accent-dark);
    border-radius: 15px;
    padding: 2rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--neon-orange-light), transparent);
    transition: left 0.5s ease;
}

.service-card:hover::before {
    left: 100%;
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--neon-orange);
    box-shadow: 0 10px 30px rgba(255, 107, 0, 0.2);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    color: var(--neon-orange);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.service-card p {
    color: var(--text-gray);
    margin-bottom: 1rem;
}

.service-features {
    list-style: none;
    color: var(--text-gray);
}

.service-features li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--neon-orange);
}

.expandable-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.5s ease;
    margin-top: 1rem;
    padding: 0;
    border-top: 1px solid transparent;
}

.expandable-content.active {
    max-height: 500px;
    padding: 1rem 0;
    border-top-color: var(--border-color);
}

.expandable-content h4 {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.expandable-content p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

/* Gallery Section */
.gallery {
    background: var(--primary-dark);
}

.gallery-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: var(--accent-dark);
    color: var(--text-light);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--neon-orange);
    color: var(--primary-dark);
    border-color: var(--neon-orange);
    transform: translateY(-2px);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.gallery-item {
    background: var(--accent-dark);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.gallery-item:nth-child(n) {
    animation-delay: calc(0.1s * var(--i));
}

.gallery-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(255, 107, 0, 0.3);
}

.gallery-item.hidden {
    display: none;
}

.gallery-image {
    height: 200px;
    background: linear-gradient(45deg, var(--accent-dark), var(--secondary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.gallery-placeholder {
    font-size: 4rem;
    opacity: 0.3;
}

.gallery-info {
    padding: 1.5rem;
}

.gallery-info h3 {
    color: var(--neon-orange);
    margin-bottom: 0.5rem;
}

.gallery-info p {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.gallery-tag {
    display: inline-block;
    background: var(--neon-orange);
    color: var(--primary-dark);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

.gallery-cta {
    text-align: center;
    margin-top: 3rem;
}

/* About Section */
.about {
    background: var(--secondary-dark);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.about-text h3 {
    color: var(--neon-orange);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.about-text p {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--neon-orange);
}

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

.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.value-item {
    background: var(--accent-dark);
    padding: 1.5rem;
    border-radius: 10px;
    transition: var(--transition);
}

.value-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(255, 107, 0, 0.1);
}

.value-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.value-item h4 {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.value-item p {
    color: var(--text-gray);
    font-size: 0.9rem;
}

.certifications {
    text-align: center;
    padding: 2rem;
    background: var(--accent-dark);
    border-radius: 15px;
}

.certifications h3 {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.cert-list {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.cert-badge {
    background: var(--neon-orange);
    color: var(--primary-dark);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Testimonials Section */
.testimonials {
    background: var(--primary-dark);
}

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

.testimonial-card {
    background: var(--accent-dark);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 107, 0, 0.2);
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-content p {
    color: var(--text-gray);
    font-style: italic;
    line-height: 1.8;
}

.testimonial-author {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.author-name {
    display: block;
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.author-title {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.testimonial-rating {
    color: var(--neon-orange);
}

/* Contact Section */
.contact {
    background: var(--secondary-dark);
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.contact-form {
    background: var(--accent-dark);
    padding: 2rem;
    border-radius: 15px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    position: relative;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: var(--secondary-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-light);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--neon-orange);
    box-shadow: 0 0 10px var(--neon-orange-light);
}

.form-group label {
    position: absolute;
    top: 50%;
    left: 1rem;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition);
}

.form-group textarea + label {
    top: 1rem;
    transform: translateY(0);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group select:focus + label,
.form-group select:valid + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -10px;
    left: 0.5rem;
    font-size: 0.8rem;
    color: var(--neon-orange);
    background: var(--accent-dark);
    padding: 0 0.5rem;
}

.info-card {
    background: var(--accent-dark);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
}

.info-card h3 {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.info-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.info-icon {
    font-size: 1.5rem;
}

.info-item strong {
    display: block;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.info-item p {
    color: var(--text-gray);
    font-size: 0.95rem;
}

.info-item a {
    color: var(--neon-orange);
    text-decoration: none;
}

.info-item a:hover {
    text-decoration: underline;
}

.service-area {
    background: var(--accent-dark);
    padding: 2rem;
    border-radius: 15px;
}

.service-area h3 {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.service-area p {
    color: var(--text-gray);
    margin-bottom: 1rem;
}

.area-list {
    list-style: none;
    color: var(--text-gray);
}

.area-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.area-list li::before {
    content: '📍';
    position: absolute;
    left: 0;
}

/* Footer */
.footer {
    background: var(--primary-dark);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 2rem;
}

.footer-logo {
    flex-shrink: 0;
}

.footer-links {
    display: flex;
    gap: 4rem;
}

.footer-column h4 {
    color: var(--text-light);
    margin-bottom: 1rem;
}

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

.footer-column a {
    color: var(--text-gray);
    text-decoration: none;
    display: block;
    padding: 0.25rem 0;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--neon-orange);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--neon-orange);
    color: var(--primary-dark);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px var(--neon-orange-glow);
}

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

/* Media Queries */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--secondary-dark);
        flex-direction: column;
        padding: 5rem 2rem;
        transition: right 0.3s ease;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 2rem;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}