*{margin:0;padding:0;box-sizing:border-box}.app-container{font-family:Arial,sans-serif;padding:20px;background-color:#000;display:flex;justify-content:center;align-items:center;height:100vh}.currency-converter{background-color:#fff;padding:20px;border-radius:8px;box-shadow:0 4px 8px #0000001a;width:100%;max-width:400px}.title{font-size:24px;text-align:center;color:#4da0ff}.input-container{margin:20px}.amount-input{width:100%;padding:10px;font-size:16px;margin-bottom:10px;border:1px solid #ddd;border-radius:4px}.currency-label{font-size:20px;margin-right:10px;font-weight:700;color:#8a8a8a;width:50%}.currency-select{padding:10px;font-size:16px;margin-bottom:10px;border:1px solid #ddd;border-radius:4px;width:40%}.convert-btn{background-color:#4caf50;color:#fff;font-size:16px;padding:10px;border:none;border-radius:4px;width:100%;cursor:pointer;transition:background-color .3s ease}.convert-btn:hover{background-color:#45a049}.convert-btn:disabled{background-color:#ccc;cursor:not-allowed}.result{font-size:18px;font-weight:700;text-align:center;margin-top:10px}.error-message{color:red;text-align:center;margin-top:10px}.container{display:flex;justify-content:center;align-items:center;padding-top:10px}