:root {
    --primary-color: #2563eb;
    --text-color: #1f2937;
    --background-color: #ffffff;
    --secondary-background: #f3f4f6;
    --max-width: 1200px;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header Styles */
.header {
    background-color: var(--background-color);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    text-align: center;
    background-color: var(--secondary-background);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #4b5563;
    max-width: 600px;
    margin: 0 auto;
}

/* Projects Section */
.projects {
    padding: 4rem 0;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

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

.project-card {
    background-color: var(--secondary-background);
    padding: 2rem;
    border-radius: 8px;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

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

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

.project-icon {
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* About Section */
.about {
    padding: 4rem 0;
    background-color: var(--secondary-background);
}

.about-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.1rem;
}

/* Contact Section */
.contact {
    padding: 4rem 0;
}

.contact-text {
    text-align: center;
    font-size: 1.1rem;
}

/* Footer */
.footer {
    background-color: var(--secondary-background);
    padding: 2rem 0;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        gap: 1rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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