:root {
  color-scheme: light;
  --paper: #f8f0df;
  --paper-deep: #eadcc3;
  --ink: #201812;
  --muted: #625548;
  --vermilion: #ad382c;
  --brass: #c9a469;
  --blue: #183f52;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(180deg, var(--paper), #fffaf0 52%, var(--paper-deep));
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Mincho ProN", "Yu Mincho", serif;
  line-height: 1.8;
}

main {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

header {
  border-bottom: 1px solid color-mix(in srgb, var(--brass) 58%, transparent);
  margin-bottom: 32px;
  padding-bottom: 24px;
}

.eyebrow {
  color: var(--blue);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0;
  margin: 0 0 8px;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  line-height: 1.12;
  margin: 0;
}

h2 {
  border-left: 4px solid var(--vermilion);
  font-size: 1.35rem;
  line-height: 1.45;
  margin: 34px 0 12px;
  padding-left: 12px;
}

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

ul {
  padding-left: 1.4em;
}

a {
  color: var(--vermilion);
  text-underline-offset: 0.18em;
}

.panel {
  background: rgba(255, 250, 240, 0.72);
  border: 1px solid color-mix(in srgb, var(--brass) 48%, transparent);
  border-radius: 8px;
  padding: 18px;
}

.muted {
  color: var(--muted);
}

.notice {
  background: rgba(173, 56, 44, 0.08);
  border-color: rgba(173, 56, 44, 0.32);
  color: var(--ink);
}

footer {
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif;
  font-size: 0.88rem;
  margin-top: 40px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 20px;
}

@media (max-width: 560px) {
  main {
    width: min(100% - 24px, 880px);
    padding-top: 36px;
  }

  h1 {
    font-size: 2.35rem;
  }
}