body{font-family:Arial,sans-serif;margin:0;padding:0;background:linear-gradient(135deg,#e3f2fd,#90caf9);color:#333;display:flex;justify-content:center;align-items:center;height:100vh}.app{text-align:center;background:#fff;padding:20px 40px;border-radius:10px;box-shadow:0 10px 20px #0000001a;width:350px}h1{margin-bottom:20px;font-size:24px;color:#1976d2}.converter-container{display:flex;flex-direction:column;gap:15px}.input-group{display:flex;align-items:center;justify-content:center;gap:10px}.input-field{padding:10px;font-size:16px;width:80px;border:1px solid #ccc;border-radius:5px;text-align:center}.dropdown{padding:10px;font-size:16px;border:1px solid #ccc;border-radius:5px}.arrow{font-size:24px;color:#1976d2}.convert-button{padding:10px 20px;font-size:16px;border:none;border-radius:5px;background:#1976d2;color:#fff;cursor:pointer;transition:background .3s}.convert-button:hover{background:#1565c0}.loading{font-size:14px;color:#f57c00}.error{color:#d32f2f;font-size:14px}.result{font-size:18px;color:#388e3c}