*, *::before, *::after { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: #0a0a0a;
  background: #fff;
  margin: 0;
  padding: 0;
}
header {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  border-bottom: 1px solid #ececec;
}
header .logo {
  font-weight: 700;
  font-size: 20px;
  color: #0a0a0a;
  text-decoration: none;
  letter-spacing: -0.3px;
}
header nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
header nav a {
  color: #6b6b6b;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}
header nav a:hover { color: #0a0a0a; }
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}
h1 {
  font-size: 32px;
  letter-spacing: -0.6px;
  margin: 0 0 24px;
}
h2 {
  font-size: 20px;
  letter-spacing: -0.3px;
  margin: 32px 0 12px;
}
h3 {
  font-size: 16px;
  margin: 24px 0 8px;
}
p, ul, ol { margin: 0 0 16px; }
ul, ol { padding-left: 22px; }
ul.nav-list { list-style: none; padding: 0; }
ul.nav-list li { padding: 12px 0; border-bottom: 1px solid #ececec; }
ul.nav-list a {
  color: #0a0a0a;
  text-decoration: none;
  font-weight: 600;
  font-size: 17px;
}
ul.nav-list a:hover { color: #FF4545; }
a { color: #0a0a0a; }
a:hover { color: #FF4545; }
code {
  background: #f7f7f7;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}
hr { border: 0; border-top: 1px solid #ececec; margin: 32px 0; }
strong { font-weight: 600; }
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 24px 48px;
  border-top: 1px solid #ececec;
  color: #a3a3a3;
  font-size: 13px;
}
.contact { color: #6b6b6b; margin-top: 24px; font-size: 14px; }