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

:root {
    --primary-color: #0056b3; /* GW Blue */
    --secondary-color: #00aaff;
    --dark-color: #1a1a1a;
    --light-color: #f8f9fa;
    --white: #ffffff;
    --gray: #666666;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

h1, h2, h3 {
    line-height: 1.2;
}

section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin: 15px auto 0;
}

.section-title.left {
    text-align: left;
}

.section-title.left::after {
    margin: 15px 0 0;
}

/* Navbar */
.navbar {
    background: var(--white);
    height: 80px;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo a {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.logo span {
    color: var(--dark-color);
    font-weight: 300;
}

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

.nav-links a {
    font-weight: 500;
    transition: var(--transition);
}

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

.btn-contact {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: 20px;
}

.btn-contact:hover {
    background: var(--dark-color) !important;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    height: 90vh;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://images.unsplash.com/photo-1581091226825-a6a2a5aee158?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    color: var(--white);
    text-align: center;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 20px;
}

.hero-content h1 span {
    color: var(--secondary-color);
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    border-radius: var(--border-radius);
    font-weight: bold;
    transition: var(--transition);
    cursor: pointer;
}

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

.btn.primary:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

.btn.secondary {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
    margin-left: 20px;
}

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

/* Products */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--light-color);
    padding: 40px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border-bottom: 4px solid transparent;
}

.product-card:hover {
    transform: translateY(-10px);
    background: var(--white);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-bottom: 4px solid var(--primary-color);
}

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

.product-card h3 {
    margin-bottom: 15px;
}

.read-more {
    display: inline-block;
    margin-top: 20px;
    color: var(--primary-color);
    font-weight: 600;
}

/* Technology */
.tech-wrapper {
    display: flex;
    align-items: center;
    gap: 50px;
}

.tech-image {
    flex: 1;
}

.tech-placeholder {
    height: 400px;
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 800;
    border-radius: var(--border-radius);
}

.tech-info {
    flex: 1;
}

.tech-info ul li {
    margin-bottom: 20px;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 15px;
}

.tech-info ul i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* Contact */
.contact {
    background: var(--light-color);
}

.contact-wrapper {
    display: flex;
    gap: 50px;
}

.contact-form {
    flex: 2;
    display: grid;
    gap: 20px;
}

.contact-form input, 
.contact-form textarea {
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.btn.full {
    width: 100%;
    border: none;
}

.contact-info {
    flex: 1;
}

.contact-info h3 {
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.contact-info p {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.social-links {
    margin-top: 30px;
    display: flex;
    gap: 20px;
}

.social-links i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Footer */
footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 40px 0;
    text-align: center;
    opacity: 0.9;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content h1 {
        font-size: 3rem;
    }
    .tech-wrapper {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* In real app, build a mobile menu toggle */
    }
    .menu-toggle {
        display: block;
    }
    .contact-wrapper {
        flex-direction: column;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
}