:root {
  color-scheme: light;
  font-family: Arial, Helvetica, sans-serif;
  color: #000;
  background: #fff;
}

* {
  box-sizing: border-box;
}

body {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
  background: #fff;
  color: #000;
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: #000;
  text-underline-offset: 3px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid #ccc;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: bold;
  text-decoration: none;
}

.brand img {
  display: block;
  border-radius: 50%;
}

main {
  padding: 64px 0;
}

h1 {
  max-width: 700px;
  margin: 0 0 24px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 6vw, 3.25rem);
  font-weight: normal;
  line-height: 1.15;
}

.introduction {
  max-width: 640px;
  margin: 0 0 64px;
  color: #444;
  font-size: 1.125rem;
}

section {
  margin-bottom: 56px;
}

h2 {
  margin: 0 0 16px;
  font-size: 1.25rem;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid #ccc;
}

li {
  padding: 20px 0;
  border-bottom: 1px solid #ccc;
}

li > a {
  font-weight: bold;
}

li p {
  margin: 4px 0 0;
  color: #555;
}

footer {
  padding: 24px 0 40px;
  border-top: 1px solid #ccc;
  color: #555;
  font-size: 0.875rem;
}

@media (max-width: 520px) {
  body {
    width: min(100% - 28px, 760px);
  }

  main {
    padding: 48px 0;
  }

  .introduction {
    margin-bottom: 48px;
  }
}