#progress-bar {
    width: 500px;
    height: 20px;
    background-color: rgb(255, 166, 0);
    position: relative;
    margin: 50px auto;
   }
 
   #progress {
    height: 100%;
    background-color: rgb(18, 184, 18);
    position: absolute;
    top: 0;
    left: 0;
    animation-name: progress-bar;
    animation-duration: 3s;
    animation-timing-function: linear;
    animation-fill-mode: forwards;
   }

   .button {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    background-color: #12486b;
    color: #dcfaff;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 10px;
    margin-bottom: 20px;
  }
  
  .button:hover {
    background-color: #2980b9;
  }

  .label{
    margin: 50px auto;
    position: absolute;
    font-size: medium;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
  }

   /* автоматическая анимация ключевых кадров с помощью CSS
    @keyframes progress-bar {
    from {width: 0;}
    to {width: 100%;}
   }
   */