style.css

@import url("https://fonts.googleapis.com/css2?family=Lato&display=swap");
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: grid;
  place-items: center;
  height: 100vh;
  background: #f8fddf;
  font-family: "Lato", sans-serif;
  color: #2b2b2b;
}

a {
  text-decoration: none;
  color: #d33f2e;
  font-size: 0.9rem;
}

.container {
  width: 100%;
  max-width: 800px;
  height: 100%;
  padding: 1em;
  display: grid;
  grid-template-rows: 800px 1fr;
  align-items: start;
}

section {
  width: 100%;
  max-width: 800px;
  height: 100%;
  max-height: 800px;
  position: relative;
}

.svg-content {
  position: absolute;
  top: 0;
  left: 0;
}

footer {
  padding: 1em 0 2em;
  text-align: center;
  display: grid;
  place-items: center;
}
footer a {
  margin-top: 20px;
}
footer div {
  border: none;
  outline: none;
  width: 40px;
  height: 40px;
  background: #ffa004;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
}
footer div svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke-width: 3;
  stroke: #fff;
  text-align: center;
}

@media (max-width: 580px) {
  .container {
    grid-template-rows: 1fr 30%;
  }
}