style.css

.origin-citation {
    text-align: right;
    font-size: 75%;
}
.bordered {
    border: 1px solid black;
    padding: 2px; /* optional, for some space inside the border */
}

.centered {
    display: flex;
    align-items: center;
    justify-content: center;
}

.box {
    border: 1px solid black;
    margin: 10px 5%;
    border-radius: 5px;
    background-color: #e6f7ff; /* light blue background */
    text-align: center; /* center the text */
}

.top-right-figure {
    position: fixed;
    top: 0;
    right: 0;
    border: 2px solid black;
    width: 100%;
  }

.text-box {
    border-radius: 10px;
    border: 2px grey solid;
    background: black;
    padding: 0cm 0% 0% 0%;
    color: white;
}

.separator{
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    margin: 0 1em;
}
.separator span {
    border-radius: 10px;
    border: 2px grey solid;
    background: black;
    padding: 1% 1% 1% 1%;
    color: white;
}
.separator::before{
  content: '';
  height: 2px;
  background: grey;
  flex: 1;
  margin: 0 0 0 0;
}
.separator::after{
  content: '';
  height: 2px;
  background: grey;
  flex: 1;
  margin: 0 0 0 0;
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* for 16:9 aspect ratio */
    overflow: hidden;
}

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

.box_code {
    border: 1px solid black;
    margin: 2px;
    font-size: 50%;
    size: 50%;
    border-radius: 5px;
    white-space: pre;
    background-color: #e6f7ff; /* light blue background */
    font-family: 'Courier New', Monaco, 'Lucida Console', monospace;
}