html {
  margin: 20px auto;
  width: 95%;
  max-width: 900px;
}

body {
  background: #ffffff;
  color: #1a1a1a;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

h1 {
  font-size: 26px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 22px;
}

h4 {
  font-size: 20px;
}

h5 {
  font-size: 18px;
}

h6 {
  font-size: 16px;
  font-weight: normal;
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
pre {
  margin: 16px 0;
  padding: 0;
}

a {
  color: #006bb7;
}

.header-content {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.content {
  margin: 20px;
  text-align: center;
}

button,
select {
  padding: 10px;
  font-size: 16px;
  cursor: pointer;
}

.atis {
  border: 1px solid #1a1a1a;
  border-radius: 2px;
  padding: 10px;
  margin-bottom: 40px;
  white-space: pre-line;
  font-family: monospace;
  font-size: 14px;
  line-height: 1.5;
}

@media (prefers-color-scheme: dark) {
  body {
    background: #1a1a1a;
    color: #eee;
  }

  .atis {
    border-color: #eee;
  }
}