body { background-color: #f8f9fa; }
.hero-section { 
    background: linear-gradient(45deg, #2c3e50, #3498db);
    color: white;
    padding: 4rem 0;
}
.skill-card {
    transition: transform 0.3s;
    cursor: pointer;
}
.skill-card:hover {
    transform: translateY(-5px);
}
.certification-badge {
    background-color: #e9ecef;
    border: 1px solid #dee2e6;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    margin: 0.25rem;
}
section { padding: 3rem 0; }
.experience-item {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}