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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 20px;
    text-align: center;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.3rem;
    opacity: 0.95;
    font-weight: 300;
}

/* Main Content */
main {
    padding: 60px 20px;
}

.intro {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 60px;
    color: #555;
}

/* Projects Grid */
.projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.project-card {
    background: white;
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.project-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.project-card h2 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #667eea;
}

.project-card p {
    color: #666;
    margin-bottom: 25px;
    line-height: 1.6;
}

/* Button */
.btn {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: opacity 0.3s ease;
}

.btn:hover {
    opacity: 0.9;
}

/* Footer */
footer {
    background: #2d3748;
    color: white;
    padding: 30px 20px;
    text-align: center;
    margin-top: 60px;
}

footer p {
    margin-bottom: 15px;
}

.social-links a {
    color: #667eea;
    text-decoration: none;
    margin: 0 10px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #764ba2;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .projects {
        grid-template-columns: 1fr;
    }
}