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

body {
  margin: 0;
  padding: 0 16px;
  font-family: system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  line-height: 1.6;
  color: #1f2933;
  background: #ffffff;
  overflow-wrap: break-word;
}

header, main, footer {
  max-width: 720px;
  margin: 0 auto;
}

.site-name {
  font-weight: 700;
}

/* 제품 소개 쪽(/·/problem·/decisions·/users·/security·/start·/faq): 머리말 nav, 그림, 문답 */
.site-name a {
  color: inherit;
  text-decoration: none;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25em 1em;
}

main figure {
  margin: 1.5em 0;
}

main figure img {
  display: block;
  max-width: 100%;
  height: auto;
}

main figcaption {
  margin-top: 0.5em;
  font-size: 0.9em;
  text-align: center;
}

.lead {
  font-size: 1.1em;
}

main blockquote {
  margin: 1.5em 0;
  padding-left: 1em;
  border-left: 4px solid #3e4c59;
}

dl.faq dt {
  margin-top: 1.25em;
  font-weight: 600;
}

dl.faq dd {
  margin-left: 0;
}