styles.css

body {
  font-family: Helvetica, Arial, sans-serif;
  text-align: center;
  margin: 0;
  padding: 0 10px;
  background: #f4f2ff;
}
@media (min-width: 500px) {
  body {
    padding: 0 6%;
  }
}
@media (min-width: 800px) {
  body {
    padding: 0 10%;
  }
}
h1 {
  font-weight: normal;
  font-style: italic;
}
h2 {
  font-size: 1.3em;
  margin-bottom: 1.5em;
}
a,
a:hover,
a:visited {
  color: #7f4fff;
  text-decoration: none;
}
p {
  text-align: justify;
}
#donate {
  display: none;
}
#donate-button {
  font-size: 1.2em;
  padding: 8px 12px;
  margin: 1em 0;
  border: 0;
  border-radius: 5px;
  background: #7f4fff;
  color: white;
  cursor: pointer;
}
#success,
#error {
  display: none;
  font-weight: bold;
  margin: 1.5em 0;
}
#unsupported {
  display: none;
  font-style: italic;
}
#unsupported .warning {
  font-weight: bold;
  color: #f47953;
  margin-bottom: 0.5em;
}
#unsupported .description {
  margin: 0 0 2em 0;
}
footer {
  margin-top: 2em;
  font-size: 0.95em;
  color: #666;
}