:root {
  color-scheme: light;
  --paper: #f8f7f2;
  --ink: #162b27;
  --muted: #40554e;
  --accent: #145b49;
  --rule: #ccd8cf;
  font-family: "Source Sans 3", system-ui, sans-serif;
  font-size: 100%;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 1.0625rem;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: .2em;
}

a:focus-visible {
  outline: .16rem solid #b74722;
  outline-offset: .25rem;
}

.frame {
  width: min(100% - 3rem, 60rem);
  margin-inline: auto;
}

.top {
  border-bottom: 1px solid var(--rule);
}

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  padding-block: 1.1rem;
}

.brand {
  color: var(--ink);
  font-weight: 720;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1.25rem;
}

nav a {
  text-decoration-thickness: .06em;
}

.intro {
  padding: clamp(2rem, 7vw, 5rem);
  margin-block: clamp(2rem, 5vw, 4rem);
  border: 1px solid #bcd2c5;
  background: #e6f0e8;
  border-radius: .8rem;
}

h1, h2, p {
  margin-block: 0;
}

h1 {
  max-width: 18ch;
  font-size: clamp(2.2rem, 6vw, 4.4rem);
  font-weight: 750;
  letter-spacing: -.04em;
  line-height: 1.04;
}

h2 {
  font-size: 1.35rem;
  line-height: 1.25;
}

p {
  max-width: 64ch;
  margin-block-start: .7rem;
  color: var(--muted);
}

.intro p {
  margin-block-start: 1.25rem;
  font-size: 1.2rem;
}

.button {
  display: inline-block;
  margin-block-start: 1.6rem;
  padding: .65rem 1.1rem;
  background: var(--accent);
  color: #fff;
  border-radius: .3rem;
  font-weight: 680;
}

.details {
  margin-block-end: 3rem;
}

.document {
  padding-block: clamp(2.4rem, 7vw, 5rem);
}

.document h2 {
  margin-block-start: 1.8rem;
}

code {
  padding: .1rem .25rem;
  background: #e7ece5;
  border-radius: .2rem;
  font-size: .93em;
}

.footer {
  padding-block: 1.3rem 2rem;
  border-top: 1px solid var(--rule);
}