:root {
    /* Color Palette */
    --primary-blue: #1a4d7a;
    --primary-dark: #0d2f4d;
    --accent-orange: #f57c00;
    --accent-gold: #ffa726;
    --neutral-100: #ffffff;
    --neutral-200: #f5f5f5;
    --neutral-300: #e0e0e0;
    --neutral-700: #424242;
    --neutral-900: #212121;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1a4d7a 0%, #0d2f4d 100%);
    --gradient-accent: linear-gradient(135deg, #f57c00 0%, #ffa726 100%);
    --gradient-overlay: linear-gradient(to bottom, rgba(13, 47, 77, 0.4), rgba(26, 77, 122, 0.6));

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Outfit', 'Inter', sans-serif;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--neutral-900);
    line-height: 1.6;
    background: var(--neutral-100);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-dark);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--neutral-700);
}

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

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    border-bottom: 4px solid var(--accent-orange);
    /* Safety stripe */
    z-index: 1000;
    transition: var(--transition-normal);
}

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

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    /* Bolder logo */
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-transform: uppercase;
    /* Industrial look */
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-links a {
    color: var(--neutral-700);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
}

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

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

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--primary-dark);
    background-image: var(--gradient-overlay), url('../images/hero2.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    overflow: hidden;
    padding: var(--spacing-xl) var(--spacing-md);
    margin-top: 70px;
}

.hero::before {
    content: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    color: var(--primary-dark);
    animation: fadeInUp 1s ease;
}

.hero h1 {
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    /* Industrial */
    letter-spacing: 2px;
    font-weight: 800;
}

.hero p {
    font-size: 1.25rem;
    color: var(--neutral-700);
    margin-bottom: var(--spacing-lg);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--accent-orange);
    display: block;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.stat-label {
    color: var(--neutral-700);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    /* Blockier buttons */
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--accent-orange);
    color: var(--neutral-100);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: #e65100;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--neutral-100);
    border: 2px solid var(--neutral-100);
}

.btn-outline:hover {
    background: var(--neutral-100);
    color: var(--primary-dark);
}

.btn-secondary {
    background: var(--primary-blue);
    color: var(--neutral-100);
    box-shadow: var(--shadow-md);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

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

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title h2 {
    position: relative;
    display: inline-block;
    padding-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 5px;
    background: var(--accent-orange);
    border-radius: 0;
}

.section-subtitle {
    max-width: 700px;
    margin: var(--spacing-md) auto 0;
    text-align: center;
    font-size: 1.1rem;
    color: var(--neutral-700);
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.card {
    background: var(--neutral-100);
    border-radius: var(--radius-sm);
    /* Boxier */
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--neutral-300);
    border-top: 4px solid transparent;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-top-color: var(--accent-orange);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-dark);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--accent-orange);
    margin-bottom: var(--spacing-md);
}

.card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--primary-dark);
}

.card p {
    color: var(--neutral-700);
}

/* Footer */
footer {
    background: var(--neutral-900);
    color: var(--neutral-100);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 5px solid var(--accent-orange);
    /* Prominent safety stripe */
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.footer-section h3 {
    color: var(--accent-gold);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    display: block;
    margin-bottom: var(--spacing-xs);
}

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

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

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-20px);
    }
}

/* Responsive */
/* Project Section Styles */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.project-card {
    background: var(--neutral-100);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--neutral-300);
    display: flex;
    flex-direction: column;
}

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

.project-card-image {
    height: 250px;
    background: var(--primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    color: white;
}

.project-card-image span {
    font-size: 4rem;
    z-index: 1;
}

.project-card-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
    opacity: 0.4;
    transition: var(--transition-normal);
}

.project-card:hover .project-card-image::after {
    opacity: 0.2;
}

.project-card-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-card-category {
    font-size: 0.8rem;
    color: var(--accent-orange);
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.project-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
    color: var(--primary-dark);
}

.project-card p {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    color: var(--neutral-700);
}

.project-card .btn {
    align-self: flex-start;
    margin-top: auto;
    font-size: 0.85rem;
    padding: 0.6rem 1.2rem;
}

/* Specific Project Image Gradients (Fallbacks for when images are not available) */
.project-villa {
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
}

.project-office {
    background: linear-gradient(135deg, #111827, #4b5563);
}

.project-apartment {
    background: linear-gradient(135deg, #064e3b, #10b981);
}

.project-mall {
    background: linear-gradient(135deg, #7c2d12, #f97316);
}

.project-bungalow {
    background: linear-gradient(135deg, #4c1d95, #8b5cf6);
}

.project-warehouse {
    background: linear-gradient(135deg, #374151, #9ca3af);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: white;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

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

    .hero {
        min-height: 80vh;
    }

    .hero-stats {
        gap: var(--spacing-md);
    }

    .card-grid,
    .project-grid {
        grid-template-columns: 1fr;
    }
}