gsvviewer/style.css

canvas {
  /* border: 1px ridge white; */
  margin: 10px;
  max-width: 90%;
  margin-top: 0px;
  margin-bottom: 0px;
  border-bottom: none;
  border-top: none;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

header {
  margin: 0px;
}

header h1,
header h2,
header h3,
header h4,
header h5,
header h6 {
  color: white;
  text-shadow: 3px 8px #111111;
  text-align: center;
  letter-spacing: 2px;
  font-family: Georgia, serif;
  margin: 0px;
  padding: 0px;
}

header h1 {
  font-size: 50px;
  text-decoration: underline;
}

header h2 {
  font-size: 40px;
}

section {
  background-color: #36393c;
  border-top: 5px solid white;
  border-bottom: 5px solid white;
  color: white;
  border-radius: 5px;
  margin-bottom: 25px;
  padding-left: 25px;
  padding-right: 25px;
}

footer {
  text-align: center;
  font-size: x-large;
}

input[type=button] {
  width: 100%;
  background-color: #4CAF50;
  color: white;
  padding: 14px 20px;
  margin: 8px 0;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

input[type=text] {
  width: 100%;
  padding: 12px 20px;
  margin: 3px 0;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
  background-color: lightgray;
}

input[type=number],
select {
  width: 100%;
  padding: 12px 20px;
  margin: 3px 0;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
  background-color: lightgray;
}

input.tall {
  height: 100px;
  font-size: 2em;
}

body {
  background: #2c2f33;
  color: white;
  font-family: "Arial";
}

main {
  margin-top: 0px;
  margin-left: auto;
  margin-right: auto;
  max-width: 80%;
}

main h1,
main h2,
main h3,
main h4,
main h5,
main h6 {
  color: white;
  text-align: center;
  margin: 0px;
  padding: 0px;
  letter-spacing: 2px;
}

main h1 {
  font-size: 50px;
}

main h2 {
  font-size: 40px;
}