/* Root Variables */
:root {
    --primary-color: #004a99; /* Professional Blue */
    --primary-dark: #003366;
    --accent-color: #f39200; /* Safety Orange */
    --text-color: #333333;
    --light-grey: #f4f7f6;
    --border-color: #e0e0e0;
    --white: #ffffff;
    --max-width: 1200px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4 {
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 10px auto 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

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

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

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

/* Header & Nav */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    color: var(--primary-color);
}

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

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

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

/* Hero Section */
.hero {
    position: relative;
    padding: 100px 0;
    background-color: var(--primary-dark);
    color: var(--white);
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-content {
    position: relative;
    max-width: 700px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.9);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    text-shadow: 0 1px 2px rgba(0,0,0,0.9);
}

.hero-btns {
    display: flex;
    gap: 15px;
}

.hero-image {
    position: absolute;
    inset: 0;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8); /* High contrast dark tint */
}

/* Services */
.services {
    padding: 80px 0;
    background-color: var(--light-grey);
}

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

.service-card {
    background-color: var(--white);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center; /* Center flex items horizontally */
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.service-card i {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
    margin: 0 auto 20px;
}

.service-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 4px;
    margin-top: auto;
    padding-top: 20px;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* About Us */
.about {
    padding: 80px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-img-rounded {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.check-list {
    margin-top: 20px;
}

.check-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-weight: 500;
}

.check-list i {
    color: var(--primary-color);
    width: 20px;
    height: 20px;
}

/* Clients Section */
.clients {
    padding: 80px 0;
    background-color: var(--white);
    text-align: center;
}

.clients-description {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-color);
}

.clients-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.client-tag {
    background-color: var(--light-grey);
    color: var(--primary-dark);
    font-weight: 600;
    font-size: 1.1rem;
    padding: 15px 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
    transition: var(--transition);
}

.client-tag:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Contact */
.contact {
    padding: 80px 0;
    background-color: var(--light-grey);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
}

.contact-info {
    background-color: var(--white);
    padding: 40px;
    border-radius: 8px;
}

.info-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.info-item i {
    color: var(--primary-color);
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.info-item h4 {
    margin-bottom: 5px;
}

.contact-form {
    background-color: var(--white);
    padding: 40px;
    border-radius: 8px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.form-group input, 
.form-group select, 
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
}

/* Footer */
footer {
    background-color: #1a1a1a;
    color: #e0e0e0;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    color: var(--white);
}

.footer-links h4, .footer-legal h4 {
    color: var(--white);
    margin-bottom: 20px;
}

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

.footer-links a:hover, .footer-legal a:hover {
    color: var(--white);
    text-decoration: underline;
}

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

/* Responsive */
@media (max-width: 992px) {
    .hero-image-placeholder {
        display: none;
    }
    .hero-overlay {
        background: rgba(0, 51, 102, 0.8);
    }
    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    .hero { padding: 60px 0; }
    .nav-links {
        display: none; /* Mobile menu logic would go here */
    }
    .mobile-menu-btn {
        display: block;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}