/* --- CSS VARIABLES & RESET --- */
    :root {
        /* Primary Colors inspired by "Rock Builders" style (Industrial/Premium) */
        --primary-color: #198754; /* Muted Gold/Orange for accents */
        --secondary-color: #264653; /* Deep Blue/Green for headers */
        --dark-bg: #1d1d1d; /* Almost black */
        --light-bg: #f8f9fa; /* Off-white */
        --text-color: #333333;
        --text-light: #ffffff;
        --accent-color: #e76f51; /* Reddish orange for CTAs */
        
        --spacing-sm: 1rem;
        --spacing-md: 2rem;
        --spacing-lg: 4rem;
        
        --border-radius: 4px;
        --shadow: 0 4px 6px rgba(0,0,0,0.1);
        --transition: all 0.3s ease;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        color: var(--text-color);
        line-height: 1.6;
        background-color: #fff;
    }

    a {
        text-decoration: none;
        color: inherit;
    }

    ul {
        list-style: none;
    }

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

    /* --- UTILITIES --- */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 var(--spacing-sm);
    }

    .section-padding {
        padding: var(--spacing-lg) 0;
    }

    .text-center { text-align: center; }
    .text-white { color: var(--text-light); }
    .text-primary { color: var(--primary-color); }

    .btn {
        display: inline-block;
        padding: 12px 30px;
        border-radius: var(--border-radius);
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 1px;
        cursor: pointer;
        transition: var(--transition);
        border: none;
    }

    .btn-primary {
        background-color: var(--primary-color);
        color: var(--light-bg);
    }

    .btn-primary:hover {
        background-color: #e08e4d;
        transform: translateY(-2px);
    }

    .btn-outline {
        background-color: transparent;
        border: 2px solid var(--text-light);
        color: var(--text-light);
    }

    .btn-outline:hover {
        background-color: var(--text-light);
        color: var(--dark-bg);
    }

    .section-title {
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: var(--spacing-sm);
        color: var(--secondary-color);
        position: relative;
        display: inline-block;
    }

    .section-title::after {
        content: '';
        display: block;
        width: 60px;
        height: 4px;
        background-color: var(--primary-color);
        margin: 10px auto 0;
    }

    /* --- HEADER & NAV --- */
    .top-bar {
        background-color: var(--dark-bg);
        color: var(--text-light);
        padding: 10px 0;
        font-size: 0.9rem;
    }

    .top-bar .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
    }

    .contact-info span {
        margin-right: 20px;
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }

    header {
        background-color: #fff;
        box-shadow: var(--shadow);
        position: sticky;
        top: 0;
        z-index: 1000;
    }

    nav {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 80px;
    }

    .logo {
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--secondary-color);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    
    .logo span {
        color: var(--primary-color);
    }

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

    .nav-links {
        display: flex;
        gap: 30px;
    }

    .nav-links a {
        font-weight: 600;
        color: var(--secondary-color);
        position: relative;
    }

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

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

    .mobile-menu-btn {
        display: none;
        font-size: 2rem;
        cursor: pointer;
        color: var(--secondary-color);
    }

    /* --- HERO SECTION --- */
    .hero {
        background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80');
        background-size: cover;
        background-position: center;
        height: 85vh;
        display: flex;
        align-items: center;
        text-align: center;
        color: var(--text-light);
    }

    .hero-content h1 {
        font-size: 3.5rem;
        margin-bottom: var(--spacing-sm);
        line-height: 1.2;
    }

    .hero-content p {
        font-size: 1.2rem;
        margin-bottom: var(--spacing-md);
        max-width: 700px;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        display: flex;
        gap: 20px;
        justify-content: center;
    }

    /* --- FEATURES / VALUES --- */
    .features {
        background-color: var(--light-bg);
        margin-top: -50px;
        position: relative;
        z-index: 10;
        padding-bottom: var(--spacing-lg);
    }

    .features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
    }

    .feature-card {
        background: #fff;
        padding: 40px 30px;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
        text-align: center;
        transition: var(--transition);
        border-bottom: 4px solid transparent;
    }

    .feature-card:hover {
        transform: translateY(-10px);
        border-bottom-color: var(--primary-color);
    }

    .feature-icon {
        font-size: 3rem;
        color: var(--primary-color);
        margin-bottom: 20px;
    }

    .feature-card h3 {
        margin-bottom: 15px;
        color: var(--secondary-color);
    }

    /* --- ABOUT SECTION --- */
    .about {
        background-color: #fff;
    }

    .about-wrapper {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 50px;
        align-items: center;
    }

    .about-image {
        position: relative;
    }

    .about-image img {
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
    }

    .about-image::before {
        content: '';
        position: absolute;
        top: -20px;
        left: -20px;
        width: 100px;
        height: 100px;
        border-top: 5px solid var(--primary-color);
        border-left: 5px solid var(--primary-color);
        z-index: -1;
    }

    .about-text h4 {
        color: var(--primary-color);
        text-transform: uppercase;
        letter-spacing: 2px;
        margin-bottom: 10px;
    }

    .about-text p {
        margin-bottom: 20px;
        color: #555;
    }

    .mission-vision {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
        margin-top: 30px;
    }

    .mv-item {
        background-color: var(--light-bg);
        padding: 20px;
        border-radius: var(--border-radius);
        border-left: 3px solid var(--secondary-color);
    }

    .mv-item h5 {
        color: var(--secondary-color);
        margin-bottom: 10px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    /* --- SERVICES SECTION --- */
    .services {
        background-color: var(--secondary-color);
        color: var(--text-light);
    }

    .services .section-title {
        color: var(--text-light);
    }

    .services .section-title::after {
        background-color: var(--text-light);
    }

    .services-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 30px;
    }

    .service-card {
        background: rgba(255, 255, 255, 0.05);
        padding: 30px;
        border-radius: var(--border-radius);
        border: 1px solid rgba(255, 255, 255, 0.1);
        transition: var(--transition);
    }

    .service-card:hover {
        background: rgba(255, 255, 255, 0.1);
        transform: scale(1.02);
    }

    .service-icon {
        background-color: var(--primary-color);
        width: 60px;
        height: 60px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        color: var(--dark-bg);
        margin-bottom: 20px;
    }

    .service-card h3 {
        margin-bottom: 15px;
        font-size: 1.25rem;
        color: var(--primary-color);
    }

    /* --- PORTFOLIO / WORK --- */
    .portfolio {
        background-color: var(--light-bg);
    }

    .portfolio-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }

    .portfolio-item {
        position: relative;
        overflow: hidden;
        border-radius: var(--border-radius);
        height: 250px;
    }

    .portfolio-item img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: var(--transition);
    }

    .portfolio-overlay {
        position: absolute;
        bottom: -100%;
        left: 0;
        width: 100%;
        padding: 20px;
        background: rgba(38, 70, 83, 0.9);
        color: #fff;
        transition: var(--transition);
    }

    .portfolio-item:hover img {
        transform: scale(1.1);
    }

    .portfolio-item:hover .portfolio-overlay {
        bottom: 0;
    }

    /* --- CONTACT SECTION --- */
    .contact {
        background-image: url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80');
        background-attachment: fixed;
        background-size: cover;
        position: relative;
    }

    .contact-overlay {
        background-color: rgba(255, 255, 255, 0.95);
        padding: var(--spacing-lg) 0;
    }

    .contact-wrapper {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 50px;
    }

    .contact-info-box h3 {
        color: var(--secondary-color);
        margin-bottom: 20px;
    }

    .contact-detail {
        display: flex;
        align-items: flex-start;
        gap: 15px;
        margin-bottom: 25px;
    }

    .contact-detail ion-icon {
        font-size: 1.5rem;
        color: var(--primary-color);
        background-color: var(--secondary-color);
        padding: 10px;
        border-radius: 50%;
    }

    .form-group {
        margin-bottom: 20px;
    }

    .form-control {
        width: 100%;
        padding: 15px;
        border: 1px solid #ddd;
        border-radius: var(--border-radius);
        font-size: 1rem;
        background-color: #f9f9f9;
    }

    .form-control:focus {
        outline: none;
        border-color: var(--primary-color);
        background-color: #fff;
    }

    /* --- FOOTER --- */
    footer {
        background-color: var(--dark-bg);
        color: #888;
        padding: 60px 0 20px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 40px;
        margin-bottom: 40px;
        border-bottom: 1px solid #333;
        padding-bottom: 40px;
    }

    .footer-col h4 {
        color: #fff;
        margin-bottom: 20px;
        font-size: 1.2rem;
    }

    .footer-links li {
        margin-bottom: 10px;
    }

    .footer-links a:hover {
        color: var(--primary-color);
        padding-left: 5px;
        transition: var(--transition);
    }

    .social-links {
        display: flex;
        gap: 15px;
        margin-top: 20px;
    }

    .social-links a {
        width: 40px;
        height: 40px;
        background-color: #333;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        transition: var(--transition);
        color: #fff;
    }

    .social-links a:hover {
        background-color: var(--primary-color);
    }

    /* --- RESPONSIVE --- */
    @media (max-width: 768px) {
        .hero-content h1 {
            font-size: 2.5rem;
        }
        
        .about-wrapper, .contact-wrapper, .mission-vision {
            grid-template-columns: 1fr;
        }

        .mobile-menu-btn {
            display: block;
        }

        .nav-links {
            position: absolute;
            top: 80px;
            left: 0;
            width: 100%;
            background-color: #fff;
            flex-direction: column;
            align-items: center;
            padding: 20px 0;
            gap: 20px;
            box-shadow: 0 10px 10px rgba(0,0,0,0.1);
            transform: translateY(-150%);
            transition: var(--transition);
            z-index: 999;
        }

        .nav-links.active {
            transform: translateY(0);
        }
        
        .top-bar {
            display: none;
        }
    }