body { font-family: Arial, sans-serif; margin: 0; padding: 0; }
header nav { background: #333; padding: 10px; }
header nav a, header nav button { color: #fff; margin-right: 10px; text-decoration: none; }
.search-form { display: inline-block; }
.piesă-card { border: 1px solid #ccc; padding: 10px; margin: 10px 0; }
.error { color: red; }