body {
  width: 90%;
  max-width: 900px;
  margin: 0 auto;
  font-family: Arial, sans-serif;
  color: maroon;
  font-size: 20px;
  background-color: #E8F0E8;
}

h1 {
   text-aligh: center;
   font-size: clamp(1.6rem, 6vw, 3.5rem);
   font-weight: bold;
   font-style: italic;
   line-height: 1.1;
   margin: 20px 0 12px;
}

h2 {
   font-size: clamp(1.15rem, 4vw, 2rem);
}

h3 {
   font-size: clamp(1.05rem, 3vw, 1.5rem);
}

p {
  margin: 10px;
}

* {
  box-sizing: border-box;
}

img,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

.video-wrap {
  width: 100%;
}

.video-wrap video {
  width: 100%;
}

audio {
  display: block;
  width: 320px;
  max-width: 100%;
}