body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
    color: #333;
}
header, nav, footer {
    background: #003366;
    color: white;
    padding: 20px;
    text-align: center;
}
nav a {
    margin: 0 15px;
    color: white;
    text-decoration: none;
}
main {
    padding: 20px;
}
.robots {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
.robot {
    background: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    flex: 1 1 calc(33% - 40px);
}
@media (max-width: 800px) {
    .robot { flex: 1 1 100%; }
}