ation: none;
      }
      body {
        width: 15rem;
        margin: 4rem auto;
      }
      input::-webkit-outer-spin-button,
      input::-webkit-inner-spin-button {
        -webkit-appearance: none;
        margin: 0;
      }
      input[type=number] {
        -moz-appearance: textfield;
      }
    </style>
  </head>
  <body>
    <div style="display:flex;flex-direction:column;align-items:stretch;">
      <div style="display:flex;margin-bottom:1rem;">
        <label for="bpm">BPM:<input id="bpm" valu