style.css

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  list-style: none;
  outline: none;
  box-sizing: border-box;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body {
  min-height: 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgb(155, 215, 215);
  background: linear-gradient(
    270deg,
    rgba(155, 215, 215, 1) 20%,
    rgba(255, 229, 175, 1) 80%
  );
  background: -webkit-linear-gradient(
    270deg,
    rgba(155, 215, 215, 1) 20%,
    rgba(255, 229, 175, 1) 80%
  );
  background: -moz-linear-gradient(
    270deg,
    rgba(155, 215, 215, 1) 20%,
    rgba(255, 229, 175, 1) 80%
  );
  background-repeat: no-repeat;
  background-attachment: fixed;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr="#9bd7d7",endColorstr="#ffe5af",GradientType=1);
  padding: 5em 0;
}

h3 {
  text-align: center;
  text-transform: uppercase;
  font: bold 34px/120% Georgia, serif;
  opacity: 0.9;
  color: #111111;
}

p {
  text-align: center;
  font: normal 16px/120% Arial, sans-serif;
  color: #111111;
  padding: 0.3em 1em;
}

h4 {
  font: normal 16px/120% Arial, sans-serif;
  color: #111111;
}

textarea {
  border: 1px solid black;
  padding: 0.5em;
  width: 400px;
  margin: 1em;
  font: normal 15px/120% "Lucida Console", "Courier New", monospace;
}

textarea::placeholder {
  color: #353131;
}

@media screen and (max-width: 426px) {
  h3 {
    font: bold 24px/120% Georgia, serif;
  }

  p {
    font: normal 14px/120% Arial, sans-serif;
    padding: 0.3em 1em;
  }

  h4 {
    font: normal 14px/120% Arial, sans-serif;
  }

  textarea {
    width: 300px;
    font-size: 14px;
  }
}