:root {
    /* Color Palette - Clean Professional (Light Default) */
    --header-bg: #ffffff;
    --bg-primary: #f8f9fa;
    --text-primary: #212529;
    --accent-color: #007bff;
    --border-color: #dee2e6;
    --card-bg: #ffffff;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);

    /* Legacy Bolder Industrial Mappings */
    --color-primary: #051b2c;
    /* Keeping Navy for Brand */
    --color-secondary: #ffb700;
    /* Keeping Yellow for Brand */
    --color-text-main: #222222;
    --color-text-light: #ffffff;
    /* Restored */
    --color-text-muted: #666666;
    --color-bg-white: #ffffff;
    --color-bg-light: #f8f9fa;
    --color-bg-dark: #111111;

    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Roboto', sans-serif;

    /* Spacing & Transitions */
    --transition-speed: 0.3s;
    --section-padding: 120px 0;
}

[data-theme="dark"] {
    /* Modern Tech (Dark) Palette */
    --header-bg: #161b22;
    --bg-primary: #0d1117;
    --text-primary: #c9d1d9;
    --accent-color: #58a6ff;
    --border-color: #30363d;
    --card-bg: #161b22;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);

    --color-text-main: #c9d1d9;
    --color-text-muted: #8b949e;
    --color-bg-white: #161b22;
    --color-bg-light: #0d1117;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 4.5rem;
    color: var(--color-text-light);
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

h2 {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    text-transform: uppercase;
}

h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 6px;
    background: var(--color-secondary);
    margin: 20px auto 0;
    border-radius: 3px;
}

h3 {
    font-size: 1.75rem;
    color: var(--color-primary);
    margin-bottom: 15px;
}

p {
    margin-bottom: 20px;
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

strong {
    color: var(--color-primary);
    font-weight: 700;
}

/* Components */
.btn {
    display: inline-block;
    padding: 16px 40px;
    border-radius: 2px;
    text-decoration: none;
    font-weight: 700;
    transition: all var(--transition-speed);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-size: 0.9rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

.section {
    padding: var(--section-padding);
}

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

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

.bg-dark h2,
.bg-dark p {
    color: var(--color-text-light);
}

/* Header */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    /* Light Header */
    padding: 20px 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    /* Light Shadow */
    transition: padding var(--transition-speed);
    border-bottom: 4px solid var(--color-secondary);
}

.main-header.scrolled {
    padding: 10px 0;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--color-primary);
    /* Dark Text */
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.main-nav ul {
    display: flex;
    gap: 40px;
}

.main-nav a {
    color: var(--color-primary);
    /* Dark Text */
    text-decoration: none;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    transition: color var(--transition-speed);
}

.main-nav a:hover {
    color: var(--color-secondary);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 30px;
    height: 3px;
    background-color: var(--color-text-light);
    transition: var(--transition-speed);
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-text-light);
    overflow: hidden;
    margin-top: 0;
}

.hero-bg-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    z-index: -2;
    object-fit: cover;
    filter: brightness(0.6);
    /* Slightly darker for text legibility */
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(5, 27, 44, 0.8) 0%, rgba(5, 27, 44, 0.4) 100%);
    z-index: -1;
}

.hero-content {
    z-index: 1;
    max-width: 900px;
    padding: 20px;
    animation: fadeIn 1s ease-out;
}

.hero-content p {
    font-size: 1.5rem;
    color: #f0f0f0;
    margin-bottom: 50px;
    font-weight: 300;
}

/* Services / What We Do */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--color-bg-white);
    padding: 40px;
    border-radius: 4px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    text-align: center;
    border-top: 4px solid transparent;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-top-color: var(--color-secondary);
}

.service-card .icon {
    font-size: 3rem;
    margin: 0 auto 20px;
    /* Centered margin */
    display: flex;
    justify-content: center;
    align-items: center;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image img {
    border-radius: 4px;
    box-shadow: 20px 20px 0 var(--color-secondary);
    /* Offset border effect */
}

/* Recent Projects with Overlay */
.project-spec-overlay {
    background: var(--color-primary);
    color: white;
    padding: 30px;
    border-radius: 4px;
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    text-align: center;
}

.spec-item .value {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-secondary);
    font-family: var(--font-heading);
}

.spec-item .label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

/* Future Projects Impactful Design */
.future-project-card {
    background: white;
    padding: 0;
    border-radius: 8px;
    margin-bottom: 80px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
    border-left: none;
    /* Removed old border */
    overflow: hidden;
}

.project-header {
    background: var(--color-primary);
    color: white;
    padding: 40px;
    text-align: center;
}

.project-header h3 {
    color: white;
    margin-bottom: 10px;
    font-size: 2.5rem;
}

.project-header p {
    color: white;
    /* Changed from opaque rgba for better visibility */
    margin: 10px 0 0;
    font-size: 1.1rem;
    opacity: 1;
    /* Force full opacity */
}

.project-header strong {
    color: var(--color-secondary);
    /* Use yellow for highlights */
}

.project-content-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 0;
}

.project-media-col {
    padding: 40px;
    background: #f4f4f4;
}

.project-specs-col {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.big-stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 20px;
    max-width: 85%;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 900px) {
    .big-stat-grid {
        grid-template-columns: 1fr;
    }
}


.big-stat {
    margin-bottom: 20px;
}

.big-stat .value {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--color-primary);
    display: block;
    line-height: 1;
    margin-bottom: 5px;
}

.big-stat .label {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
    font-weight: 700;
    letter-spacing: 1px;
    border-left: 3px solid var(--color-secondary);
    padding-left: 10px;
}

/* Sliders */
.slider-wrapper {
    position: relative;
    overflow: hidden;
    width: 100%;
    margin-bottom: 20px;
    border-radius: 4px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.slider-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.slide {
    min-width: 100%;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-secondary);
    color: var(--color-primary);
    border: none;
    font-size: 1.5rem;
    padding: 15px;
    cursor: pointer;
    transition: all 0.3s;
    opacity: 0.8;
}

.slider-btn:hover {
    opacity: 1;
    padding: 15px 20px;
}

.prev {
    left: 0;
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}

.next {
    right: 0;
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    background: white;
    padding: 60px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.05);
    border-radius: 8px;
}

/* Footer */
.main-footer {
    background-color: #020d18;
    /* Blacker navy */
    color: rgba(255, 255, 255, 0.4);
    padding: 60px 0;
    text-align: center;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

/* Responsive */
@media (max-width: 900px) {
    h1 {
        font-size: 3rem;
    }

    h2 {
        font-size: 2.2rem;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle span {
        background-color: var(--color-primary);
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #ffffff;
        padding: 20px;
        text-align: center;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 15px;
    }


    .about-grid,
    .contact-grid,
    .project-content-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .project-header h3 {
        font-size: 1.8rem;
    }

    .container {
        padding: 0 20px;
    }
}