:root {
  font:
    18px/1.6 system-ui,
    sans-serif;
  color: #16304e;
  background: #fff;
  color-scheme: light;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
main {
  max-width: 52rem;
  margin: auto;
  padding: 1.25rem;
}
h1 {
  font-size: 1.8rem;
  line-height: 1.2;
}
h2 {
  font-size: 1.3rem;
}
button,
input,
select,
textarea {
  font: inherit;
  max-width: 100%;
}
button {
  padding: 0.4rem 0.75rem;
  margin: 0.2rem;
  border: 1px solid #034fa0;
  border-radius: 0.3rem;
  background: #034fa0;
  color: white;
  cursor: pointer;
}
button:disabled {
  opacity: 0.6;
  cursor: default;
}
label {
  display: block;
  margin: 0.5rem 0;
}
input:not([type='checkbox']):not([type='radio']),
select,
textarea {
  display: block;
  padding: 0.3rem;
  border: 1px solid #697b8e;
  border-radius: 0.2rem;
}
input[type='checkbox'],
input[type='radio'] {
  margin-right: 0.5rem;
}
a {
  color: #034fa0;
}
:focus-visible {
  outline: 3px solid #0078d4;
  outline-offset: 3px;
}
article,
fieldset {
  padding: 0.75rem;
  margin-block: 0.75rem;
  border: 1px solid #9bb0c9;
  border-radius: 0.35rem;
}
output {
  display: block;
}
ul {
  padding-left: 1.5rem;
}
pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
[role='alert'] {
  font-weight: 600;
}
nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
:root[data-theme='dark'] {
  color: #d6e7fb;
  background: #061d30;
  color-scheme: dark;
}
:root[data-theme='dark'] a {
  color: #8ecbff;
}