.card-container{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.visited-flag{width:100px}@media (width<=650px){.card-container{grid-template-columns:repeat(1,1fr)}}.card{background-color:#4683b431;border:2px solid #00f;border-radius:10px;margin:20px;padding:20px}.card-visited{background-color:#99cd3231;border:2px solid green;border-radius:10px;margin:20px;padding:20px}.flags{border-radius:10px;width:100%}.btn{background-color:#80808077;border:1px solid #000;border-radius:15px;padding:10px}