* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
  color: #1f2933;
  background: #ffffff;
}

a {
  color: #1557b0;
}

.site-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid #d9e2ec;
}

.brand {
  font-weight: 700;
  color: #111827;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

nav a {
  font-size: 14px;
}

main {
  width: min(100%, 980px);
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.hero {
  padding: 26px 0 22px;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(32px, 7vw, 56px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin: 34px 0 12px;
  font-size: 26px;
}

h3 {
  margin: 24px 0 8px;
  font-size: 20px;
}

p {
  margin: 0 0 14px;
}

.lead {
  max-width: 720px;
  font-size: 18px;
}

.button {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 14px;
  border: 1px solid #1557b0;
  background: #1557b0;
  color: #ffffff;
  text-decoration: none;
}

.secondary {
  background: #ffffff;
  color: #1557b0;
}

.button-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 18px 0;
}

.guide-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 10px;
  align-items: center;
  margin: 32px 0 0;
  padding-top: 18px;
  border-top: 1px solid #d9e2ec;
}

.guide-nav div:last-child {
  text-align: right;
}

.note {
  padding: 14px;
  border: 1px solid #d9e2ec;
  background: #f7fafc;
}

.phase {
  padding: 18px 0;
  border-top: 1px solid #d9e2ec;
}

.card-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0 24px;
}

.card {
  display: block;
  padding: 14px;
  border: 1px solid #d9e2ec;
  text-decoration: none;
  color: #1f2933;
  background: #ffffff;
}

.card strong {
  display: block;
  margin-bottom: 6px;
}

.card span {
  display: block;
  color: #52606d;
  font-size: 14px;
}

.plain-list {
  padding-left: 20px;
}

.plain-list li {
  margin: 7px 0;
}

.template {
  white-space: pre-wrap;
  padding: 14px;
  border: 1px solid #d9e2ec;
  background: #f7fafc;
  font-family: Consolas, "Courier New", monospace;
  font-size: 14px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.references a {
  overflow-wrap: anywhere;
}

.crumb {
  color: #52606d;
  font-size: 14px;
  margin-bottom: 14px;
}

footer {
  border-top: 1px solid #d9e2ec;
  color: #52606d;
  padding: 18px 20px 28px;
  text-align: center;
  font-size: 14px;
}

@media (max-width: 700px) {
  .site-header {
    display: block;
  }

  nav {
    margin-top: 8px;
  }

  main {
    padding: 22px 16px 38px;
  }

  .card-list {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
    text-align: center;
  }

  .guide-nav {
    grid-template-columns: 1fr;
  }

  .guide-nav div:last-child {
    text-align: left;
  }
}