:root {
    /* Colors */
    --primary-color: #0056b3;
    /* Example blue, will refine */
    --secondary-color: #333;
    --text-color: #555;
    --light-bg: #f9f9f9;
    --white: #ffffff;
    --border-color: #ddd;

    /* Typography */
    --font-main: 'Helvetica Neue', Helvetica, Arial, sans-serif;

    /* Spacing */
    --container-width: 1200px;
    --spacing-unit: 1rem;
}

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

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

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

ul {
    list-style: none;
}

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

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

/* Header */
header {
    background-color: var(--white);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.top-bar {
    background-color: #f4f4f4;
    padding: 0.5rem 0;
    font-size: 0.9rem;
    color: #777;
}

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

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-unit);
}

.logo img {
    height: 60px;
    /* Adjust based on actual logo */
}

nav ul {
    display: flex;
    gap: 1.5rem;
}

nav a {
    font-weight: 600;
    color: var(--secondary-color);
    text-transform: uppercase;
    font-size: 0.9rem;
}

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

/* Page Header */
.page-header {
    background-color: var(--light-bg);
    padding: 3rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

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

/* Hero Section */
.hero {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('../assets/images/hero-bg.png');
    background-size: cover;
    background-position: center;
    color: var(--white);
    padding: 8rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.3rem;
    max-width: 800px;
    margin: 0 auto 2.5rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0.8rem 2rem;
    border-radius: 5px;
    font-weight: 600;
    text-transform: uppercase;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #004494;
    /* Darker shade of primary */
}

/* Sections General */
.section {
    padding: 4rem 0;
}

.section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--secondary-color);
    position: relative;
}

.section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 1rem auto 0;
}

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

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

.mt-2 {
    margin-top: 2rem;
}

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

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

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.service-card h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--white);
    border-radius: 5px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.project-card h3 {
    padding: 1rem;
    text-align: center;
    font-size: 1.1rem;
    color: var(--secondary-color);
}

/* Clients Grid */
.clients-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 3rem;
    align-items: center;
}

.client-logo {
    font-weight: bold;
    color: #999;
    font-size: 1.5rem;
    /* Replace with actual logo styles when images are available */
}

/* Footer */
footer {
    background-color: #222;
    color: #ccc;
    padding: 3rem 0;
    margin-top: auto;
}

footer .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

footer h3 {
    color: var(--white);
    margin-bottom: 1rem;
}

footer a:hover {
    color: var(--white);
}