<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    html, body, #main {
      margin: 0;
      height: 100%;
    }
    .container {
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .player {
      flex: 1;
      min-height: 0;
    }
    .controls {
      display: flex;
      height: 40px;
    }
    .control {
      width: 50px;
      height: 40px;
      font-size: 23px;
      border: none;
      outline: none;
      cursor: pointer;
      background: #fff;
  