style.css

* {
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  max-width: 1280px;
  margin-inline: auto;
}

.tab-container {
  box-shadow: rgba(0, 0, 0, 0.5) 0 1px 2px;
  justify-content: center;
}

.tab-button {
  padding: 8px 16px;
  border-bottom: transparent 4px solid;
  transition: border-bottom-color 0.4s;
}

.content {
  padding: 16px;
}

.tab-actor:checked + .tab-button {
  border-bottom-color: rgb(82, 2, 136);
}

@media screen and (max-width: 480px) {
  .tab-button {
    border-bottom: 1px solid #ccc;
    transition: none;
  }

  .tab-content {
    background-color: ivory;
  }

  .tab-container.full-height {
    height: 100vh;
    flex-direction: column;
  }

  .tab-container.full-height .tab-content {
    display: block;
    height: auto;
    flex: 0;
    overflow: hidden;

    transition: 300ms flex;
  }

  .tab-container.full-height .tab-actor:checked + .tab-button + .tab-content {
    flex: 1;
  }
}