*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:#333}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.btn{padding:.5rem 1rem;border:none;border-radius:4px;cursor:pointer;font-size:1rem}.btn-primary{background:#3498db;color:#fff}.btn-primary:hover{background:#2980b9}.card{background:#fff;border-radius:8px;box-shadow:0 2px 4px #0000001a;padding:1.5rem;margin-bottom:1.5rem}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}