body{font-family:Arial,sans-serif;margin:0;padding:0;background:linear-gradient(135deg,#2b2b2b,#3a3a3a);color:#e0e0e0;display:flex;justify-content:center;align-items:center;height:100vh}.app{text-align:center;background:#1f1f1f;padding:20px 40px;border-radius:10px;box-shadow:0 10px 25px #0006;width:350px}h1{margin-bottom:20px;font-size:24px;color:#cfcfcf}.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 #555;border-radius:5px;text-align:center;background:#2a2a2a;color:#e0e0e0}.input-field:focus{outline:none;border-color:#9e9e9e}.dropdown{padding:10px;font-size:16px;border:1px solid #555;border-radius:5px;background:#2a2a2a;color:#e0e0e0}.arrow{font-size:24px;color:#9e9e9e}.convert-button{padding:10px 20px;font-size:16px;border:none;border-radius:5px;background:#424242;color:#fff;cursor:pointer;transition:background .3s}.convert-button:hover{background:#616161}.loading{font-size:14px;color:#bdbdbd}.error{color:#ef5350;font-size:14px}.result{font-size:18px;color:#aed581}