:root {
  --paper: #fbfaf6;
  --surface: #ffffff;
  --ink: #26313b;
  --muted: #66736c;
  --rule: #e5e3dc;
  --sage: #5f7865;
  --sage-soft: #edf3ec;
  --warm: #fff6e7;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  overflow-x: clip;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.7;
}

main {
  width: min(100% - 2rem, 48rem);
  margin-inline: auto;
  padding-block: clamp(2rem, 8vw, 4rem) 4rem;
}

article {
  padding: clamp(1.25rem, 5vw, 2.5rem);
  border: 1px solid var(--rule);
  border-radius: 1.25rem;
  background: var(--surface);
}

header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--rule);
}

header img {
  width: 4.5rem;
  height: 4.5rem;
  flex: none;
  border-radius: 22%;
}

h1,
h2 {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 8vw, 3.5rem);
  letter-spacing: -0.045em;
  line-height: 1.05;
}

h2 {
  margin: 3rem 0 0.75rem;
  font-size: 1.25rem;
  line-height: 1.35;
}

p,
li {
  font-size: 1rem;
}

.sub,
.label {
  color: var(--muted);
}

.label {
  margin: 0.35rem 0 0;
  font-size: 0.9375rem;
  font-weight: 700;
}

.notice {
  padding: 1rem;
  border-left: 3px solid var(--sage);
  background: var(--warm);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

a {
  color: var(--sage);
  font-weight: 700;
  text-underline-offset: 0.2em;
}

a:focus-visible {
  outline: 3px solid var(--sage);
  outline-offset: 3px;
}

.back,
footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}

footer {
  color: var(--muted);
  font-size: 0.875rem;
}

@media (max-width: 23.4375rem) {
  header {
    align-items: flex-start;
  }

  header img {
    width: 3.5rem;
    height: 3.5rem;
  }
}