:root {
  color-scheme: dark;
  font-family:
    Inter,
    system-ui,
    -apple-system,
    sans-serif;
  background: #050609;
  color: #f7f8fb;
  line-height: 1.75;
  font-size: 18px;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
a {
  color: #ffad70;
  text-underline-offset: 0.22em;
}
a:hover {
  color: #fff;
}
a:focus-visible,
main:focus {
  outline: 2px solid #ff8a2d;
  outline-offset: 5px;
}
header,
footer {
  padding: 24px max(24px, calc((100% - 1120px) / 2));
  border-block-end: 1px solid #30343d;
}
header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 32px;
}
header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}
.brand {
  font-weight: 700;
  color: #f7f8fb;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.brand-accent {
  color: #ff8a2d;
}
main {
  max-width: 72ch;
  padding: 56px 24px 40px;
  margin: auto;
}
h1,
h2 {
  line-height: 1.2;
  text-wrap: balance;
}
h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  letter-spacing: -0.035em;
  margin: 0.4em 0 0.6em;
}
h2 {
  font-size: 1.4rem;
  margin: 0 0 1em;
  scroll-margin-top: 24px;
}
p {
  margin: 0 0 1em;
}
.intro {
  font-size: 1.15rem;
  color: #c2cad7;
}
.eyebrow {
  font-family: ui-monospace, monospace;
  color: #ffad70;
  font-size: 0.75rem;
  letter-spacing: 0.07em;
}
section,
aside,
.contents {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid #30343d;
}
.contents {
  padding: 24px;
  background: #0d1017;
  border: 1px solid #30343d;
}
.contents h2 {
  font-size: 1rem;
}
ol,
ul {
  padding-left: 1.3em;
  margin-bottom: 0;
}
li + li {
  margin-top: 0.55em;
}
.formula {
  padding: 20px;
  border-left: 3px solid #ff8a2d;
  background: #0d1017;
  overflow-wrap: anywhere;
}
code {
  font-family: ui-monospace, monospace;
  font-size: 0.9em;
}
.next {
  border-top-color: #ff8a2d;
}
.button {
  display: inline-block;
  margin: 8px 16px 8px 0;
  padding: 10px 18px;
  background: #ff8a2d;
  color: #16181d;
  font-weight: 650;
  text-decoration: none;
}
.button:hover {
  background: #ffad70;
  color: #16181d;
}
footer {
  font-size: 0.85rem;
  color: #b1bac9;
  border-top: 1px solid #30343d;
  overflow-wrap: anywhere;
}
.skip {
  position: absolute;
  left: 20px;
  top: -120px;
  background: #050609;
  padding: 12px;
}
.skip:focus {
  top: 12px;
}
@media (max-width: 480px) {
  :root {
    font-size: 16px;
  }
  main {
    padding-top: 32px;
  }
  .contents {
    padding: 18px;
  }
  header nav {
    width: 100%;
    justify-content: space-between;
  }
}
@media print {
  :root {
    color-scheme: light;
    background: white;
    color: black;
  }
  a,
  .brand {
    color: black;
  }
  .intro,
  .eyebrow,
  footer {
    color: #333;
  }
  .contents,
  .formula {
    background: white;
  }
  .next,
  header nav,
  .skip {
    display: none;
  }
}