body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

*, *::before, *::after {
  box-sizing: border-box;
}

header {
  background-color: #4CAF50;
  color: white;
  padding: 1rem;
  text-align: center;
  font-size: 1.5rem;
}

main {
  display: flex;
  min-height: 80vh;
}

.left-column {
  flex: 0 0 150px;
  max-width: 300;
  min-width: 100;
  background-color: #f4f4f4;
  padding: 0.15rem;
  box-sizing: border-box;
}

.left-column button {
  padding: 0.25rem;
  margin-bottom: 10px;
  font-size: 1.2rem;
  cursor: pointer;
  border: none;
  background-color: #4CAF50;
  color: white;
  border-radius: 5px;
}

.left-column button:hover {
  background-color: #45a049;
}

.right-column {
  flex: 1;
  padding: 1rem;
  box-sizing: border-box;
  min-width: 0;
}

iframe {
  width: 100%;
  border: none;
}

footer {
  background-color: #222;
  color: white;
  text-align: center;
  padding: 1rem;
}

/* ========== Responsive Design ========== */

/* Tablets (max-width: 992px) */
@media screen and (max-width: 992px) {
  main {
    flex-direction: column;
  }

  .left-column, .right-column {
    width: 100%;
  }

  .left-column {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
  }

  .left-column button {
    margin: 5px;
  }

  iframe {
    
  }
}

@media screen and (max-width: 600px) {
  header {
    font-size: 1.5rem;
    padding: 0.8rem;
  }

  .left-column {
    width: 100% !important;
    max-width: 500px !important;
    min-width: none;
    max-height: fit-content;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;    
  }

  .left-column button {
    font-size: 1.1rem;
    padding: 0.8rem 1rem;
    margin: 0;
    flex: 1 1 auto;
    min-width: 100px;
    max-width: 200px;
  }

  iframe {
    height: 100%;
  }
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  height: 0;
  overflow: hidden;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}