body {
  margin-left: 1.5cm;
  margin-right: 1.5cm;
  background-color: #fff8dc;
  font-family: "UDFont", sans-serif;
  font-size: 14px;
}

.img-wrapper {
  float: right;
  margin: 0.2em;
  width: 35%;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.img-wrapper img {
  width: 100%;
  margin-bottom: 0.5em;
}

.my-image {
  height: 250px;
}

.my2-image {
  max-width: 90%;
  height: 400px;
}

.my3-image {
  height: 450px;
}

.my4-image {
  display: inline-block; /* 中央配置のためにインラインブロックにする */
  max-width: 100%; /* 画像のサイズをコンテナに合わせる */
  height: auto; /* アスペクト比を維持 */
}
.center {
  max-width: 100%;
  height: auto;
}

.center img {
  display: block;
  margin: 0 auto;
}

h1 {
  color: blue;
  text-align: center;
  font-size: 28px;
}

h2 {
  margin-bottom: 0.5em;
  font-size: 22px;
}

h3 {
  margin-bottom: 0.5em;
  font-size: 18px;
}

.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.article {
  width: 60%;
  margin-bottom: 20px;
}

.article img {
  max-width: 100%;
  height: auto;
}

img {
  max-width: 100%;
  height: auto;
  width: 1500px;
}

p {
  margin-top: 0.2em;
  text-indent: 1em; /* Fix syntax error */
  font-size: 20px;
}

table {
  margin-left: 1cm;
  font-size: 17px;
  border-collapse: collapse;
  width: 100%;
}

ul,
ol,
li {
  font-size: 18px;
}

p {
  padding-left: 30px;
}

h3 {
  padding-left: 20px;
}

ul,
ol {
  padding-left: 60px;
}

.separator {
  border: 4px solid #B0C4DE;
  padding: 10px;
  background-color: #66cdaa;
}

table {
  font-size: 17px;
  border-collapse: collapse;
  width: 100%;
}

th,
td {
  border: 1px solid black;
  padding: 5px;
  text-align: left;
}

th {
  background-color: lightgray;
}

.footer-image {
  display: flex;
  align-items: center;
}

.footer-text {
  margin-left: 10px;
  font-size: 50px;
  color: #666;
}

.right {
  float: right;
}

.emphasis {
  color: red;
  font-weight: bold;
}
// script.js

function fullScreen(element) {
  element.requestFullscreen();
}

function exitFullscreen() {
  if (document.fullscreenElement) {
    document.exitFullscreen();
  } else if (document.mozFullScreenElement) {
    document.mozCancelFullScreen();
  } else if (document.webkitFullscreenElement) {
    document.webkitExitFullscreen();
  }
}

document.addEventListener("click", function(event) {
  if (event.target.classList.contains("video-link")) {
    var videoElement = event.target.querySelector("iframe");
    if (videoElement) {
      fullScreen(videoElement);
    }
  }
});
/* styles.css */

.ytd-video-ad-container {
  display: none;
}

.ytd-ad-player {
  display: none;
}
<script>src="https://cdnjs.cloudflare.com/ajax/libs/adblockplus/3.12.2/adblockplus.min.js"></script>