body {
  font-family: "Figtree", sans-serif;
  font-weight: 400;
  font-style: normal;
  background-color: #ffffff;
  color: #000000;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px clamp(16px, 5vw, 48px);
  border-bottom: 1px solid #eee;
}

header > a {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  text-decoration: none;
  color: inherit;
}

header h1 {
  font-size: 1rem;
  font-weight: 600;
}

header nav ul {
  display: flex;
  gap: clamp(12px, 3vw, 28px);
  list-style: none;
}

header nav a {
  text-decoration: none;
  color: inherit;
  background-color: transparent;
  font-size: 0.9rem;
  font-weight: 400;
  transition: font-weight 0.1s ease;
  /* Reserve space for the bold state so neighbours don't shift */
  display: inline-flex;
  flex-direction: column;
  align-items: center;
}

header nav a::after {
  content: attr(data-text);
  font-size: 0.9rem;
  font-weight: 800;
  height: 0;
  visibility: hidden;
  overflow: hidden;
  user-select: none;
  pointer-events: none;
}

header nav a:hover,
header nav a.active {
  font-weight: 800;
}

main {
  background-color: #ffffff;
  color: #000000;
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(24px, 6vw, 64px) clamp(16px, 5vw, 48px);
}

main ul a {
  text-decoration: none;
  color: #000000;
  background-color: transparent;
}

main ul a:hover {
  text-decoration: none;
  color: #000000;
  background-color: transparent;
  font-weight: bold;
}


footer {
  border-top: 1px solid #eee;
}

footer nav {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px clamp(16px, 5vw, 48px);
}

footer nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  list-style: none;
  justify-content: center;
  align-items: center;
}

footer nav a {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: #aaa;
  background-color: transparent;
  transition: color 0.2s ease;
}

footer nav a:hover {
  color: #666;
  background-color: transparent;
}

main h1 { font-size: 2rem;      font-weight: 800; margin-bottom: 0.5rem; }
main h2 { font-size: 1.5rem;    font-weight: 700; margin-bottom: 0.4rem; }
main h3 { font-size: 1.25rem;   font-weight: 600; margin-bottom: 0.35rem; }
main h4 { font-size: 1.1rem;    font-weight: 600; margin-bottom: 0.3rem; }
main h5 { font-size: 1rem;      font-weight: 600; margin-bottom: 0.25rem; }
main h6 { font-size: 0.9rem;    font-weight: 600; margin-bottom: 0.25rem; }
main p  { font-size: 1rem;      line-height: 1.7; margin-bottom: 1rem; }

main * + h1 { margin-top: 2.5rem; }
main * + h2 { margin-top: 2rem; }
main * + h3 { margin-top: 1.75rem; }
main * + h4,
main * + h5,
main * + h6 { margin-top: 1.25rem; }

main h1 + p,
main h2 + p,
main h3 + p,
main h4 + p { margin-top: 0.4rem; }

main ul,
main ol  { padding-left: 1.5rem; margin-bottom: 1rem; line-height: 1.7; }
main li  { margin-bottom: 0.25rem; }

main blockquote { margin: 1.5rem 0; padding-left: 1rem; border-left: 3px solid #eee; color: #666; background-color: transparent; }
main hr         { margin: 2rem 0; border: none; border-top: 1px solid #eee; }
main small      { font-size: 0.8rem; color: #999; background-color: transparent; }

main ul.books {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin-bottom: 1rem;
}

main ul.books li:nth-child(-n+3) {
  grid-column: 1 / -1;
}

@media (max-width: 540px) {
  main ul.books {
    grid-template-columns: 1fr;
  }

  main ul.books li:nth-child(-n+3) {
    grid-column: 1;
  }
}