body,html{padding:0;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.6;color:#333}*{box-sizing:border-box}a{color:inherit;text-decoration:none}.container{max-width:1200px;margin:0 auto;padding:0 20px}.text-center{text-align:center}.mt-4{margin-top:1rem}.mb-4{margin-bottom:1rem}.btn{display:inline-block;padding:10px 20px;border-radius:5px;text-decoration:none;border:none;cursor:pointer;font-size:1rem;transition:all .3s ease}.btn-primary{background-color:#3498db;color:white}.btn-primary:hover{background-color:#2980b9;transform:translateY(-2px)}.btn-secondary{background-color:#95a5a6;color:white}.btn-secondary:hover{background-color:#7f8c8d}.btn-danger{background-color:#e74c3c;color:white}.btn-danger:hover{background-color:#c0392b}.card{background-color:white;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,.1);padding:20px;margin-bottom:20px}.card-header{border-bottom:1px solid #eee;padding-bottom:15px;margin-bottom:15px}.card-title{margin:0;color:#2c3e50;font-size:1.5rem}.error-state,.loading-state{display:flex;justify-content:center;align-items:center;min-height:200px;flex-direction:column}.error-state{color:#e74c3c}.loading-text{font-size:1rem}@media (max-width:768px){.container{padding:0 15px}h1{font-size:2rem}h2{font-size:1.5rem}.btn{width:100%;margin-bottom:10px}}