:root {
  --ink: #263238;
  --muted: #65706d;
  --paper: #fbfaf7;
  --surface: #ffffff;
  --line: #dfe3dc;
  --accent: #356f78;
  --accent-soft: #6d8978;
  --focus: #b86e45;
}

* { box-sizing: border-box; }

html { background: var(--paper); }

body {
  max-width: 46rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 5rem;
  color: var(--ink);
  background: var(--paper);
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-size: 1.125rem;
  line-height: 1.78;
  overflow-wrap: break-word;
}

a { color: var(--accent); text-decoration-thickness: .08em; text-underline-offset: .16em; }
a:hover { color: #1f5962; }
a:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

h1, h2, h3 { color: #243a3d; line-height: 1.25; letter-spacing: .01em; }
h1 { font-size: clamp(2rem, 5vw, 2.65rem); margin: 1.6rem 0 .75rem; }
h2 { font-size: clamp(1.4rem, 3vw, 1.75rem); margin: 2.6rem 0 .8rem; }
h3 { font-size: 1.2rem; margin: 1.8rem 0 .5rem; }
p, li { max-width: 40rem; }
ul, ol { padding-left: 1.35rem; }

.hero, .site-header {
  margin-bottom: 2rem;
  padding: 1.25rem 1.35rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: .8rem;
}
.hero h1, .site-header h1 { margin: 0; font-size: clamp(1.6rem, 4vw, 2.05rem); }
.hero .tagline, .site-header p, .meta, .small, .micro-meta { color: var(--muted); }
.hero .tagline, .site-header p { margin: .35rem 0 0; }
.title-row { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

.series-panel, .card, .article-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: .7rem;
}
.series-panel { margin: 1.5rem 0; padding: 1.15rem; }
.article-library { margin: 1.5rem 0; }
.article-library .series-kicker { margin: 0 0 .6rem .1rem; }
.feature-article { border-color: #b8ccc2; border-left: 4px solid var(--accent-soft); padding: 1.35rem; }
.feature-article h2 { margin: .15rem 0 .45rem; font-size: clamp(1.55rem, 3vw, 2rem); }
.guide-heading { margin: 2.25rem 0 .75rem; }
.guide-heading h2 { margin: .15rem 0; font-size: 1.25rem; }
.library-panel { display: inline-block; min-width: 13rem; }
.article-item, .card { padding: 1rem 1.1rem; margin: .75rem 0; }
.article-item h3, .card h3 { margin: 0 0 .25rem; }
.article-item p { margin: 0; }
.series-kicker { color: var(--accent-soft); font-size: .75rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.series-title { margin: .2rem 0 .75rem; }

.citation { margin-left: .08em; font-family: system-ui, sans-serif; font-size: .7em; font-weight: 700; vertical-align: super; line-height: 0; }
.citation a { text-decoration: none; }
.references { margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.references ol { padding-left: 1.5rem; }
.references li { padding-left: .25rem; margin: .5rem 0; font-size: .95rem; }

.site-footer { margin-top: 2.5rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.series-nav { margin-top: 2.75rem; }
.series-nav h2 { margin: .15rem 0 .8rem; font-size: 1.2rem; }
.series-track { margin-left: .2rem; padding-left: 1rem; border-left: 1px solid #c8d8d0; }
.series-master { padding: .1rem 0 .1rem .8rem; border-left: 3px solid var(--accent-soft); }
.series-master-link { display: inline-flex; align-items: baseline; gap: .45rem; font-weight: 700; font-size: 1.05rem; }
.series-guides { margin-top: 1rem; }
.series-nav-label { color: var(--muted); font-family: system-ui, sans-serif; font-size: .73rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.series-nav ul { margin: .3rem 0 0; padding: 0; list-style: none; }
.series-nav li { margin: 0; }
.series-nav li + li { margin-top: .2rem; }
.series-guide-link { display: inline-flex; align-items: baseline; gap: .45rem; padding: .16rem 0; }
.series-nav [aria-current="page"] { font-weight: 700; color: var(--ink); text-decoration-color: var(--accent-soft); }
.series-nav em { color: var(--muted); font-size: .9em; }
.home-series { margin: 1.5rem 0 2.25rem; }
.home-series .series-track { margin-top: .65rem; }
.home-series-master { padding: .1rem 0 .25rem .8rem; border-left: 3px solid var(--accent-soft); }
.home-series-master h2 { margin: 0 0 .25rem; font-size: clamp(1.55rem, 3vw, 2rem); }
.home-series-master p, .home-series-guide p { margin: 0; }
.home-series-guide { padding: .45rem 0; }
.home-series-guide + .home-series-guide { border-top: 1px solid var(--line); }
.home-series-guide h3 { margin: 0 0 .15rem; }
.subscribe-strip { margin-top: 2rem; padding: 1rem 1.15rem; border: 1px solid var(--line); border-left: 4px solid var(--accent-soft); border-radius: .7rem; background: var(--surface); }
.subscribe-title { font-weight: 700; }
.subscribe-row { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: .5rem; }
.subscribe-row input { min-width: min(100%, 15rem); padding: .55rem .65rem; border: 1px solid var(--line); border-radius: .4rem; font: inherit; }
.subscribe-row button { padding: .55rem .8rem; color: white; background: var(--accent); border: 0; border-radius: .4rem; font: inherit; cursor: pointer; }

@media (max-width: 48rem) {
  body { padding: 1.5rem 1rem 4rem; font-size: 1.1rem; line-height: 1.72; }
}