:root {
    /* Color Palette - Elite Engineering */
    --primary-color: #0f172a;
    /* Main Navy */
    --secondary-color: #334155;
    /* Slate */
    --accent-color: #d4af37;
    /* Gold/Bronze */
    --light-bg: #f8fafc;
    /* Off-white */
    --white: #ffffff;
    --text-dark: #1e293b;
    --text-light: #94a3b8;

    /* Spacing & Layout */
    --container-width: 1200px;
    --header-height: 80px;

    /* Effects */
    --glass-bg: rgba(255, 255, 255, 0.95);
    --glass-border: 1px solid rgba(255, 255, 255, 0.2);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

#cad-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

/* background-color removed */
line-height: 1.6;
overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

/* Layout Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 100px 0;
}

/* Header & Navigation */
/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

header.scrolled {
    --header-height: 70px;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo span {
    color: var(--accent-color);
}

/* Desktop Menu */
.desktop-menu {
    display: flex;
    gap: 8px;
    /* Tighter gap for pills */
}

.desktop-menu a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--secondary-color);
    position: relative;
    padding: 8px 16px;
    /* Pill padding */
    border-radius: 50px;
    /* Pill shape */
    transition: all 0.3s ease;
}

/* Hover State - Soft Pill */
.desktop-menu a:hover {
    background: var(--light-bg);
    color: var(--primary-color);
}

/* Active State - Solid Pill */
.desktop-menu a.active {
    background: var(--primary-color);
    color: var(--white);
    font-weight: 600;
}

.desktop-menu a:hover {
    color: var(--primary-color);
}

/* CTA Button */
.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 12px 30px;
    border-radius: 4px;
    /* Slightly squared for engineering look */
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    border: 1px solid var(--primary-color);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--white);
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid var(--white);
}

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

/* Hero Section */
.hero {
    height: 100vh;
    width: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    /* Fallback */
    color: var(--white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.6));
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 800px;
    padding: 20px;
}

.hero-subtitle {
    display: block;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent-color);
    margin-bottom: 20px;
    font-weight: 600;
}

.hero h1 {
    font-size: 4rem;
    color: var(--white);
    margin-bottom: 30px;
    line-height: 1.1;
}

.hero p {
    font-size: 1.2rem;
    color: #cbd5e1;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.section-header p {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    border: 1px solid #e2e8f0;
    padding: 40px 30px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.service-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(212, 175, 55, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.service-card p {
    color: var(--secondary-color);
    font-size: 0.95rem;
}

/* Mobile Menu Button */
.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
}

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

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

.animate-up {
    animation: fadeInUp 0.8s ease forwards;
}

/* Responsive */
@media (max-width: 768px) {

    .desktop-menu,
    .header-cta {
        display: none;
    }

    .mobile-toggle {
        display: block;
    }

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

    .hero p {
        font-size: 1rem;
    }
}

/* Hero Slider Styles */
.hero-slider-container {
    position: relative;
    width: 100%;
    height: 600px;
    /* Adjust height as needed */
    overflow: hidden;
    background-color: #0f172a;
    margin-top: 0;
}

@media (max-width: 768px) {
    .hero-slider-container {
        height: 400px;
    }
}

.hero-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide.active {
    opacity: 1;
    z-index: 1;
}

.slide-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.5);
    /* Improve text readability */
}

.slide-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 20px;
}

.slide-content h2 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.2;
    color: var(--white);
}

.slide-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #e2e8f0;
}

@media (max-width: 768px) {
    .slide-content h2 {
        font-size: 2rem;
    }
}

/* Slider Controls */
.slider-prev,
.slider-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    padding: 15px;
    cursor: pointer;
    z-index: 10;
    border-radius: 50%;
    transition: background 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.slider-prev:hover,
.slider-next:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.slider-prev {
    left: 30px;
}

.slider-next {
    right: 30px;
}

.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s;
}

.dot.active {
    background: var(--accent-color);
    transform: scale(1.3);
}