:root {
    --primary-color: #0d253f; /* Dark Navy Blue */
    --secondary-color: #00b4d8; /* Bright Cyan/Blue for accents */
    --accent-color: #fca311; /* Warm creative accent */
    --text-color: #333333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --dark-bg: #1a1a1a;
    --transition-speed: 0.3s;
    --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-body: 'Open Sans', Helvetica, Arial, sans-serif;
}

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

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

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

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 80px 0;
}

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

/* Header */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
}

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

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

.nav-links li a {
    font-weight: 600;
    color: var(--primary-color);
}

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

.cta-button {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 10px 25px;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color var(--transition-speed);
}

.cta-button:hover {
    background-color: #0096c7;
    color: var(--white);
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s ease-in-out;
    background-color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(13, 37, 63, 0.8), rgba(13, 37, 63, 0.8)), url('../images/hero-logistics.jpg');
    background-size: cover;
    background-position: center;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-align: center;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--white);
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 30px;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 15px 30px;
    border-radius: 5px;
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    display: inline-block;
}

.btn-primary:hover {
    background-color: #0077b6;
}

/* Why Choose Us */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.feature-card {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

/* Services Section */
.services-section {
    background-color: var(--light-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-item {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: box-shadow 0.3s;
}

.service-item:hover {
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.service-img {
    height: 200px;
    width: 100%;
    object-fit: cover;
}

.service-info {
    padding: 25px;
}

.service-info h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* Contact Section & Form */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 50px;
}

.contact-info-box {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 40px;
    border-radius: 10px;
}

.contact-info-box h3, .contact-info-box h4 {
    color: var(--white);
}

.info-item {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-top: 15px;
}

.checkbox-group input {
    margin-top: 5px;
}

.error-message {
    color: red;
    font-size: 0.85rem;
    margin-top: 5px;
    display: none;
}

/* Footer */
footer {
    background-color: var(--dark-bg);
    color: #b0b0b0;
    padding: 60px 0 20px;
}

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

.footer-col h3 {
    color: var(--white);
    margin-bottom: 20px;
}

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

.footer-col ul li a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    font-size: 0.9rem;
}

/* Page Headers (About, Services, Contact etc) */
.page-header {
    background: linear-gradient(rgba(13, 37, 63, 0.9), rgba(13, 37, 63, 0.9)), url('../images/about-team.jpg'); /* Default fallback */
    background-size: cover;
    background-position: center;
    padding: 100px 0;
    text-align: center;
    color: var(--white);
}

.page-header h1 {
    color: var(--white);
    font-size: 2.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-links {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 10px rgba(0,0,0,0.1);
        padding: 20px 0;
    }

    .nav-links.active {
        left: 0;
    }

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

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