.shell { width: 90%; margin-inline: auto; }
.site-nav { display: flex; align-items: center; gap: 24px; min-height: 88px; padding-block: 16px; border-bottom: 1px solid var(--line); }
.site-nav .brand { margin-right: auto; }
.site-nav nav { display: flex; align-items: center; gap: 32px; font-size: 14px; }
.site-nav nav a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; color: var(--muted); }
.site-nav nav a[aria-current], .site-nav nav a:hover { color: var(--ink); }
main { padding-block: 48px; }
.intro { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: end; padding-bottom: 32px; }
.kicker { font-size: 14px; color: var(--muted); margin: 0 0 16px; }
h1 { font-size: clamp(40px, 4vw, 48px); line-height: 1.06; letter-spacing: -.055em; margin: 0; font-weight: 600; max-width: 20ch; }
.intro-copy, .method-intro { color: var(--muted); font-size: 16px; max-width: 60ch; margin: 0; }
.method { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; padding-block: 32px; border-top: 1px solid var(--line); }
h2 { font-size: 24px; line-height: 1.25; letter-spacing: -.5px; font-weight: 600; margin: 0 0 16px; max-width: 30ch; }
.step { display: grid; grid-template-columns: 24px 1fr; gap: 16px; padding-bottom: 24px; }
.step-index { color: var(--muted); font-size: 12px; padding-top: 4px; }
.step h3 { font-size: 18px; font-weight: 600; margin: 0 0 8px; }
.step p, .source-note p { color: var(--muted); font-size: 14px; margin: 0; }
.source-note { display: flex; align-items: center; gap: 32px; justify-content: space-between; padding-block: 32px; border-top: 1px solid var(--line); }
.source-note p { max-width: 70ch; }
.submit-link { display: inline-flex; align-items: center; min-height: 44px; border: 1px solid var(--line); border-radius: var(--control-radius); padding: 10px 16px; text-decoration: none; white-space: nowrap; }
footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; padding-block: 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
@media (max-width: 734px) {
  .site-nav { flex-wrap: wrap; gap: 12px; padding-block: 16px; }
  .site-nav nav { order: 3; width: 100%; gap: 24px; }
  main { padding-top: 24px; }
  h1 { font-size: 32px; }
  .intro, .method { grid-template-columns: 1fr; gap: 24px; }
  .source-note { flex-direction: column; align-items: start; gap: 24px; }
}