/* =========================================
   1. CSS Variables & Reset
   ========================================= */
:root {
    /* Colors */
    --primary-color: #003366;
    /* Deep Navy Blue - Trust, Corporate */
    --secondary-color: #89C53F;
    /* Industrial Orange - Energy, Safety */
    --accent-color: #004080;
    /* Lighter Blue for hover */
    --text-color: #333333;
    /* Dark Grey for text */
    --light-text: #666666;
    /* Lighter Grey for subtitles */
    --bg-light: #F4F4F4;
    /* Light Grey Background */
    --white: #FFFFFF;
    --border-color: #E0E0E0;

    /* Typography */
    --font-main: 'Roboto', sans-serif;
    --font-heading: 'Montserrat', sans-serif;

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

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

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

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

ul {
    list-style: none;
}

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

/* =========================================
   2. Typography
   ========================================= */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

h1 {
    font-size: 3rem;
    line-height: 1.2;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: 1rem;
}

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

.section {
    padding: 80px 0;
}

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

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

.text-white {
    color: var(--white);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #598721;
    transform: translateY(-2px);
}

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

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

/* =========================================
   4. Header & Navigation
   ========================================= */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    /* Removed font styles as we are using image now, but keeping flex for alignment if needed */
}

.logo-img {
    max-height: 80px;
    /* Adjust based on header height */
    width: 250px;
}

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

.nav-links a {
    font-weight: 500;
    color: var(--primary-color);
    font-size: 16px;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--secondary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--secondary-color);
    transition: width 0.3s;
}

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

.lang-switch {
    font-weight: bold;
    cursor: pointer;
    border: 1px solid var(--primary-color);
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 14px;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* =========================================
   5. Hero Section
   ========================================= */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 51, 102, 0.7), rgba(0, 51, 102, 0.7)), url('../img/projects/stripper_vessel_1.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    margin-top: var(--header-height);
    /* Offset for fixed header */
}

.hero-content h1 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 3.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

/* =========================================
   6. Services Section
   ========================================= */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    border-bottom: 4px solid transparent;
}

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

.service-icon {
    font-size: 40px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
    font-size: 1.4rem;
}

/* =========================================
   7. About Section (Brief)
   ========================================= */
.about-brief {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
}

.about-image {
    flex: 1;
}

.about-image img {
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* =========================================
   8. Footer
   ========================================= */
footer {
    background-color: #002244;
    /* Darker Navy */
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--secondary-color);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

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

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

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: #aaa;
}

/* =========================================
   9. Responsive
   ========================================= */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        /* Hide for now, will toggle with JS */
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: var(--white);
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    }

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

    .menu-toggle {
        display: block;
    }

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

    .about-brief {
        flex-direction: column;
    }
}