:root {
  --walkthrough-ink: #0f1c2e;
  --walkthrough-accent: #1f6b5a;
  --walkthrough-gold: #c4a35a;
  --walkthrough-paper: #f7f9fb;
  --walkthrough-gutter: 1rem;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "Source Sans 3", "Segoe UI", Candara, sans-serif;
  color: var(--walkthrough-ink);
  background:
    radial-gradient(900px 420px at 80% -10%, rgba(31, 107, 90, 0.16), transparent 50%),
    linear-gradient(180deg, #e8eef4, var(--walkthrough-paper));
  overflow-x: clip;
}

a {
  color: var(--walkthrough-accent);
}

.walkthrough-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 1rem var(--walkthrough-gutter);
  border-bottom: 1px solid rgba(15, 28, 46, 0.08);
  background: rgba(247, 249, 251, 0.9);
}

.walkthrough-brand {
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 700;
  text-decoration: none;
  color: var(--walkthrough-ink);
}

.walkthrough-portal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.55rem 1rem;
  border-radius: 2px;
  background: var(--walkthrough-gold);
  color: var(--walkthrough-ink);
  font-weight: 700;
  text-decoration: none;
}

.walkthrough-main {
  width: min(100% - (var(--walkthrough-gutter) * 2), 720px);
  margin: 2rem auto 3rem;
}

.walkthrough-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--walkthrough-accent);
}

h1 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(1.85rem, 7vw, 3rem);
  margin: 0.35rem 0 1rem;
  overflow-wrap: anywhere;
}

.walkthrough-lead {
  line-height: 1.6;
  margin-bottom: 2rem;
}

.walkthrough-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.walkthrough-steps li {
  padding: 1rem 0;
  border-top: 1px solid rgba(15, 28, 46, 0.12);
}

.walkthrough-steps h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.walkthrough-steps p {
  margin: 0;
  line-height: 1.55;
}

@media (min-width: 48rem) {
  :root {
    --walkthrough-gutter: 1.5rem;
  }

  .walkthrough-header {
    padding: 1.25rem 1.5rem;
  }

  .walkthrough-main {
    margin: 3rem auto 4rem;
  }

  .walkthrough-steps h2 {
    font-size: 1.25rem;
  }
}

@media (min-width: 64rem) {
  :root {
    --walkthrough-gutter: 2rem;
  }
}