/* Articles section. Loaded after /styles.css, which supplies the tokens, the
   base type and the footer. Nothing is redefined here: the section borrows the
   home page's paper, navy ink, cobalt links and Newsreader/IBM Plex pairing, so
   an article reads as the same site with the cover taken off. */

/* ---------- slim head, standing in for the cover ---------- */

.page-head {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.page-head-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1320px;
  margin-inline: auto;
  padding: calc(18px + env(safe-area-inset-top, 0px)) var(--gutter) 18px;
}

.page-mark {
  font: 400 22px/1 var(--serif);
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}

.page-head nav {
  display: flex;
  gap: 24px;
  font-size: 14px;
}

.page-head nav a {
  color: var(--ink-2);
  text-decoration: none;
}

.page-head nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.page-head nav a[aria-current="page"] { color: var(--ink); }

/* ---------- shared page frame ---------- */

.page {
  max-width: 1320px;
  margin-inline: auto;
  padding: clamp(56px, 8vw, 104px) var(--gutter) clamp(72px, 10vw, 128px);
}

.kicker {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ---------- index: the list of articles ---------- */

.section-title {
  font: 300 clamp(34px, 4.2vw, 60px)/1.06 var(--serif);
  letter-spacing: -0.02em;
  margin-top: 10px;
  max-width: 16ch;
}

.section-lede {
  margin-top: 20px;
  max-width: var(--measure);
  color: var(--ink-2);
}

.listing {
  margin-top: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--rule);
}

.entry {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 8px clamp(24px, 4vw, 56px);
  padding: clamp(26px, 3.5vw, 40px) 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
}

.entry-meta {
  font-size: 13px;
  color: var(--ink-3);
  padding-top: 7px;
}

.entry-title {
  font: 400 clamp(21px, 2.1vw, 28px)/1.22 var(--serif);
  letter-spacing: -0.008em;
}

.entry-summary {
  grid-column: 2;
  margin-top: 10px;
  max-width: var(--measure);
  color: var(--ink-2);
  font-size: 15px;
}

.entry:hover .entry-title { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }

/* ---------- the article itself ---------- */

.article { max-width: 46rem; }

.article-title {
  font: 300 clamp(30px, 3.6vw, 50px)/1.08 var(--serif);
  letter-spacing: -0.018em;
  margin-top: 10px;
}

.article-meta {
  margin-top: 20px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
  font-size: 13px;
  color: var(--ink-3);
}

/* the body is the one place the serif carries running text, at a size meant
   for reading rather than for display */
.article-body {
  margin-top: clamp(28px, 4vw, 44px);
  font: 400 clamp(17px, 1.35vw, 19px)/1.66 var(--serif);
  color: var(--ink);
}

.article-body > * + * { margin-top: 1.15em; }
.article-body p { max-width: var(--measure); }

.article-body h2 {
  font: 400 clamp(23px, 2.2vw, 30px)/1.2 var(--serif);
  letter-spacing: -0.012em;
  margin-top: 2.2em;
}

.article-body h3 {
  font: 500 16px/1.35 var(--sans);
  letter-spacing: 0.01em;
  margin-top: 1.9em;
}

.article-body a { color: var(--cobalt); text-decoration-thickness: 1px; text-underline-offset: 3px; }

.article-body ul,
.article-body ol {
  max-width: var(--measure);
  padding-left: 1.3em;
  margin-block: 1.15em;
}

.article-body li + li { margin-top: 0.5em; }
.article-body li::marker { color: var(--ink-3); }

.article-body blockquote {
  margin: 1.8em 0;
  padding-left: clamp(18px, 2.5vw, 28px);
  border-left: 2px solid var(--cobalt);
  max-width: var(--measure);
  font-size: 1.05em;
  line-height: 1.5;
  color: var(--ink-2);
}

.article-body blockquote p { margin: 0; }
.article-body strong { font-weight: 600; }
.article-body u { text-decoration: none; }

.article-source {
  margin-top: clamp(44px, 6vw, 72px);
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-size: 14px;
  color: var(--ink-3);
}

.article-source a { color: var(--cobalt); }

.article-back {
  margin-top: 28px;
  font-size: 14px;
}

.article-back a { color: var(--cobalt); text-decoration: none; }
.article-back a:hover { text-decoration: underline; text-underline-offset: 4px; }

@media (max-width: 760px) {
  .entry {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .entry-meta { padding-top: 0; }
  .entry-summary { grid-column: 1; }
}