:root {
    --color-primary: #1C1C1C;
    /* Charcoal */
    --color-secondary: #000000;
    /* Black */
    --color-accent: #FFB400;
    /* Warm Mustard/Gold - Adjustable */
    --color-white: #FFFFFF;
    --color-off-white: #F5F5F5;
    --color-text: #333333;
    --color-text-light: #F5F5F5;

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --border-radius: 4px;
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.6;
}

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

ul {
    list-style: none;
}

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

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

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--color-accent);
    color: var(--color-primary);
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 2px solid var(--color-accent);
    cursor: pointer;
}

.btn:hover {
    background-color: transparent;
    color: var(--color-accent);
}

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

.btn-outline:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
}

/* Header */
.header {
    background-color: var(--color-white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.header.scrolled {
    padding: 0.5rem 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
}

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

.logo img {
    height: 60px;
    /* Adjust based on actual logo aspect ratio */
    width: auto;
    transition: var(--transition);
}

.header.scrolled .logo img {
    height: 50px;
}

.nav-list {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-list a {
    font-weight: 600;
    color: var(--color-primary);
    transition: var(--transition);
    font-size: 1rem;
}

.nav-list a:hover {
    color: var(--color-accent);
}

.nav-list .btn-nav {
    padding: 8px 20px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--border-radius);
}

.nav-list .btn-nav:hover {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    height: 100vh;
    min-height: 600px;
    background-image: url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?q=80&w=2070&auto=format&fit=crop');
    /* Construction/Architecture vibe */
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    color: var(--color-white);
    margin-top: 0;
    /* Override section padding for hero */
    padding: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(28, 28, 28, 0.7), rgba(28, 28, 28, 0.5));
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.hero-btns {
    display: flex;
    gap: var(--spacing-sm);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-list {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow);
        transform: translateY(-150%);
        transition: var(--transition);
        z-index: 999;
    }

    .nav-list.active {
        transform: translateY(0);
    }

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

    .hero h1 {
        font-size: 2.5rem;
    }
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-header p {
    color: #666;
    font-size: 1.1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border-bottom: 3px solid transparent;
}

.service-card:hover {
    transform: translateY(-5px);
    border-bottom-color: var(--color-accent);
}

.icon-box {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

/* Gallery Section */
.gallery {
    background-color: var(--color-white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-sm);
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    cursor: pointer;
    height: 300px;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 2000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90vh;
    border-radius: var(--border-radius);
}

.close-lightbox {
    position: absolute;
    top: 20px;
    right: 30px;
    color: var(--color-white);
    font-size: 40px;
    cursor: pointer;
}

/* About Section */
.about {
    background-color: var(--color-off-white);
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

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

@media (max-width: 768px) {
    .about-container {
        grid-template-columns: 1fr;
    }
}

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

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.info-item i {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-top: 5px;
}

.map-placeholder {
    margin-top: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.contact-form {
    background-color: var(--color-off-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-family: inherit;
}

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

.btn-block {
    width: 100%;
    text-align: center;
}

@media (max-width: 768px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-logo img {
    height: 40px;
    margin-bottom: var(--spacing-sm);
    /* filter: brightness(0) invert(1); */
    /* Make logo white if needed, or keep original */
}

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

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--color-white);
}

.footer-social a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: #aaa;
}