* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--font-body); font-size: 1.05rem; line-height: 1.7; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
.skip-link { position: fixed; left: 1rem; top: 1rem; z-index: 20; transform: translateY(-180%); background: var(--surface); color: var(--ink); padding: .7rem 1rem; font-weight: 600; }
.skip-link:focus { transform: translateY(0); }
.site-header { background: var(--ink); color: var(--ground); }
.site-header__inner { width: min(100% - 2rem, 72rem); min-height: 5.5rem; margin-inline: auto; display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.wordmark { display: inline-flex; flex-direction: column; line-height: 1; text-decoration: none; }
.wordmark__stars { margin-bottom: .35rem; color: var(--accent-soft); font-size: .52rem; letter-spacing: .52em; }
.wordmark__name { font-family: var(--font-display); font-size: clamp(.78rem, 2.7vw, 1.05rem); letter-spacing: .1em; text-transform: uppercase; }
.site-nav { display: flex; align-items: center; gap: .3rem; flex-wrap: wrap; }
.site-nav a { min-height: 44px; display: inline-flex; align-items: center; padding: .35rem .55rem; font-family: var(--font-data); font-size: .64rem; letter-spacing: .075em; text-decoration: none; text-transform: uppercase; }
.site-nav a:hover { color: var(--accent-soft); }
.page-main { padding: clamp(4rem, 9vw, 7rem) 1rem; }
.page-shell { width: min(100%, 48rem); margin-inline: auto; }
.author-intro { display: grid; grid-template-columns: minmax(0, 1fr) clamp(10rem, 24vw, 13rem); gap: clamp(2rem, 6vw, 4rem); align-items: center; }
.author-intro__copy { min-width: 0; }
.author-portrait { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border: 3px solid var(--accent-soft); border-radius: 50%; box-shadow: 0 1.2rem 2.5rem rgba(18, 25, 35, .18); }
.eyebrow { margin: 0 0 1rem; color: var(--focus); font-family: var(--font-data); font-size: .7rem; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; }
h1 { max-width: 13ch; margin: 0; font-family: var(--font-display); font-size: clamp(2.7rem, 9vw, 5.2rem); font-weight: 400; line-height: 1.04; letter-spacing: -.03em; text-wrap: balance; }
.lede { max-width: 37rem; margin: 1.35rem 0 0; color: var(--ink-muted); font-size: 1.18rem; }
.prose { margin-top: 3rem; padding-top: 2.2rem; border-top: 1px solid var(--rule); }
.prose p { margin: 0 0 1.35rem; }
.prose p:first-child { font-family: var(--font-display); font-size: clamp(1.55rem, 4vw, 2.1rem); line-height: 1.4; }
.contact-card { margin-top: 2.5rem; border: 1px solid var(--rule); background: var(--surface); padding: clamp(1.5rem, 5vw, 2.5rem); }
.contact-card h2 { margin: 0; font-family: var(--font-display); font-size: clamp(1.6rem, 5vw, 2.25rem); font-weight: 400; }
.contact-card p { margin: .8rem 0 0; }
.email-link { display: inline-block; margin-top: .5rem; color: var(--accent); font-family: var(--font-data); font-size: clamp(.88rem, 3vw, 1rem); font-weight: 500; overflow-wrap: anywhere; }
.page-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2.5rem; }
.prose h2 { margin: 2.75rem 0 .8rem; font-family: var(--font-display); font-size: clamp(1.5rem, 4vw, 2.15rem); font-weight: 400; line-height: 1.25; }
.prose h2:first-child { margin-top: 0; }
.prose a { color: var(--accent); font-weight: 600; }
.resource-callout { margin: 2.5rem 0; padding: clamp(1.5rem, 5vw, 2.5rem); background: var(--surface); border-left: 4px solid var(--accent); }
.resource-callout h2 { margin-top: 0; }
.resource-callout p { margin-bottom: 0; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--accent); padding: .75rem 1rem; font-family: var(--font-data); font-size: .68rem; font-weight: 500; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }
.button--primary { background: var(--ink); color: var(--ground); border-color: var(--ink); }
.button--secondary { color: var(--ink); }
.site-footer { padding: 2rem 1rem; background: var(--ink); color: var(--surface-2); font-family: var(--font-data); font-size: .64rem; letter-spacing: .04em; }
.site-footer__inner { width: min(100%, 72rem); margin-inline: auto; display: flex; gap: 1rem 1.5rem; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.site-footer nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.site-footer a { color: inherit; }
@media (max-width: 38rem) {
  .site-header__inner { padding-block: .75rem; }
  .site-nav { width: 100%; }
  .author-intro { grid-template-columns: 1fr; gap: 2rem; }
  .author-portrait { grid-row: 1; width: min(11rem, 48vw); }
}

/* Standalone reader guide: its header is not over a dark homepage hero. */
.how-it-works-page .site-header { position: relative; width: 100%; padding-inline: max(1rem, calc((100% - 72rem) / 2)); background: var(--ink); }
.how-it-works-page .case-walkthrough .page-hero { padding: clamp(4.5rem, 9vw, 8rem) 1rem; background: var(--surface); }
.how-it-works-page .case-walkthrough .page-hero h1 { max-width: 12ch; color: var(--ink); }
.how-it-works-page .case-walkthrough .page-hero .hero__copy { color: var(--ink-muted); }