/* Main Container */
#audiobook-calculator {
    margin: 20px auto;
    padding: 20px 30px;
    border-radius: 8px;
    background-color: #f8f9fa;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    font-family: Arial, sans-serif;
  }
  
  /* Form Styling */
  #audiobook-calculator label {
    display: block;
    margin: 10px 0 5px;
    font-weight: bold;
    color: #495057;
  }
  .time-group{
    width: 100%;
  }
  .time-group .time{
    width: 50%;
    float: left;
  }
  #audiobook-calculator input[type="number"] {
    width: 80%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 16px;
  }
  
  /* Custom Slider Styling */
  #playback-speed-slider {
    display: flex;
    justify-content: space-between;
    position: relative;
    width: 100%;
    margin: 20px 0;
    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;
  }
  
  #playback-speed-slider::before {
    content: "";
    position: absolute;
    height: 2px;
    width: 100%;
    top: 55%;
    left: 0;
    background: #000;
  }
  
  #playback-speed-slider input[type="radio"] {
    display: none;
  }
  
  #playback-speed-slider label {
    position: relative;
    height: 100%;
    cursor: pointer;
  }
  
  #playback-speed-slider label::before {
    content: attr(data-speed);
    position: absolute;
    top: 25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 12px;
    color: #495057;
    white-space: nowrap;
    opacity: 0.7;
  }
  
  #playback-speed-slider label::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    background: #fff;
    border: 2px solid #000;
    border-radius: 50%;
    transition: all 0.2s ease-in-out;
  }
  
  #playback-speed-slider input[type="radio"]:checked + label::after {
    background: #000;
  }
  
  #playback-speed-slider input[type="radio"]:checked + label::before {
    color: #000;
    opacity: 1;
  }
  
  /* Position Indicator */
  #speed-pos {
    position: absolute;
    top: 76%;
    width: 16px;
    height: 16px;
    background: #000;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: left 0.2s ease-in-out;
    z-index: 1;
  }
  
  /* Speed Display */
  #speed-display {
    text-align: center;
    font-size: 18px;
    color: #495057;
    margin-bottom: 20px;
  }
  
  /* Listening Time Result */
  #result {
    text-align: center;
  }
  
  #result h2 {
    color: #495057;
  }
  
  #listening-time {
    font-size: 34px;
    color: #28a745;
    font-weight: bold;
  }
  
  /* Visually Hidden Class for Accessibility */
  .visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  
  
  /* Responsive Design */
  @media (max-width: 480px) {
    #audiobook-calculator {
        padding: 15px;
    }
  
    #audiobook-calculator h1 {
        font-size: 24px;
    }
  
    #listening-time {
        font-size: 20px;
    }
  
    #playback-speed-slider label::before {
        top: 20px;
        font-size: 10px;
    }
  }