* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  body {
    font-family: Arial, sans-serif;
    background-color: #000;
    color: #fff;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    position: relative;
  }
  .gif-container {
    position: fixed;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
  }
  
  .gif-container img {
    max-width: 200px;
    border-radius: 12px;
  }
  .container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 1200px;
    width: 100%;
  }
  .content-box {
    background-color: #fff;
    color: #000;
    padding: 20px 25px;
    border-radius: 16px;
    min-width: 300px;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
  }
  .size-buttons {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
  }
  .size-buttons button {
    flex: 1;
    margin: 0 5px;
    padding: 10px 0;
    background-color: #eee;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s ease;
  }
  .size-buttons button.active {
    background-color: #000;
    color: #fff;
  }
  .size-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 25px;
  }
  .size-table th,
  .size-table td {
    text-align: left;
    padding: 10px 5px;
    border-bottom: 1px solid #ddd;
    font-size: 14px;
  }
  .how-to-measure h3 {
    font-size: 16px;
    margin-bottom: 10px;
  }
  .measurement-guide {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: nowrap;
    width: 100%;
  }
  .measurement-guide img {
    max-width: 160px;
    height: auto;
  }
  .measurement-guide ul {
    list-style: none;
    font-size: 14px;
    padding-left: 0;
    flex: 1;
  }
  .measurement-guide li {
    margin-bottom: 10px;
  }
  .measurement-guide span {
    display: block;
    color: #555;
    font-size: 13px;
  }
  .how-to-measure {
    margin-bottom: 40px;
  }
  .know-your-size {
    text-align: center;
    margin-top: 20px;
  }
  .know-your-size button {
    background-color: #000;
    color: #fff;
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  .know-your-size button:hover {
    background-color: #333;
  }