body {
    font-family: Arial, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
}
.header {
    text-align: center;
    margin-bottom: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 10px;
}
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}
.project-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}
.project-thumbnail {
    width: 100%;
    max-width: 310px;
    height: auto;
    border-radius: 8px;
    margin-bottom: 15px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}
.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}
.project-title {
    font-size: 1.4em;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
}
.project-description {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.5;
}
.project-link {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.2s;
    margin-right: 10px;
    margin-bottom: 5px;
}
.project-link:hover {
    background: #5a67d8;
}
.project-link.secondary {
    background: #48bb78;
}
.project-link.secondary:hover {
    background: #38a169;
}
.external-projects {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-top: 30px;
}
.footer {
    text-align: center;
    margin-top: 40px;
    color: #666;
    font-size: 0.9em;
}