:root {
    /* Colors */
    --primary-color: #0F172A;
    /* Slate 900 */
    --secondary-color: #0EA5E9;
    /* Sky 500 */
    --accent-color: #F97316;
    /* Orange 500 */
    --text-color: #334155;
    /* Slate 700 */
    --light-bg: #F8FAFC;
    /* Slate 50 */
    --white: #FFFFFF;
    --dark-overlay: rgba(15, 23, 42, 0.85);

    /* Fonts */
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Roboto', sans-serif;

    /* Spacing */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--primary-color);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

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

ul {
    list-style: none;
}

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

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

/* Header */
.main-header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
}

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

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

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-links a {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.95rem;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    height: 90vh;
    /* Full viewport height minus header roughly */
    min-height: 600px;
    display: flex;
    align-items: center;
    background-image: url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    /* Tech background placeholder */
    background-size: cover;
    background-position: center;
    color: var(--white);
    margin-top: 100px;
    /* Offset for fixed header */
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, rgba(15, 23, 42, 0.8) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.text-highlight {
    color: var(--secondary-color);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-outline {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #0284c7;
    /* Darker Sky */
    border-color: #0284c7;
}

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

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

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

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

/* Services */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
}

.section-header p {
    color: #64748b;
    font-size: 1.1rem;
}

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

.card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.icon-wrapper {
    width: 60px;
    height: 60px;
    background-color: #e0f2fe;
    color: var(--secondary-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-list {
    margin-top: 1.5rem;
    border-top: 1px solid #e2e8f0;
    padding-top: 1.5rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #64748b;
}

.feature-list li i {
    color: var(--secondary-color);
}

/* Projects / Clients */
.clients-grid {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.client-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: #94a3b8;
    transition: color 0.3s ease;
}

.client-item:hover {
    color: var(--primary-color);
}

.client-item span {
    font-weight: 600;
}

.cta-box {
    background-color: var(--primary-color);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    color: var(--white);
}

.cta-box p {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.cta-box .btn-outline {
    border-color: var(--white);
    color: var(--white);
}

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

/* Contact */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h2 {
    margin-bottom: 1rem;
}

.contact-details {
    margin-top: 2rem;
}

.contact-details li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-details i {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-top: 0.2rem;
}

.contact-details a {
    display: block;
    color: var(--text-color);
}

.contact-details a:hover {
    color: var(--secondary-color);
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--primary-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.full-width {
    width: 100%;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: #cbd5e1;
    padding: 4rem 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-logo p {
    margin-top: 1rem;
    font-size: 0.9rem;
}

.footer-links h4,
.footer-social h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer-links ul li {
    margin-bottom: 0.8rem;
}

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

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    font-size: 1.5rem;
}

.social-icons a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-logo,
    .footer-links,
    .footer-social {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-md);
        text-align: center;
    }

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