/* ── Article page layout ── */
.article-wrap {
  max-width: 720px; margin: 0 auto; padding: 0 32px;
}
.article-back {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--ff-mono); font-size: 10px;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-low); text-decoration: none;
  padding: 80px 0 40px; border: none;
  transition: color .2s;
}
.article-back:hover { color: var(--teal); }
.article-back::before { content: '←'; font-size: 13px; }

.article-header { margin-bottom: 48px; }
.article-meta {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 20px;
}
.article-date {
  font-family: var(--ff-mono); font-size: 10px;
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink-low);
}
.article-cat {
  font-family: var(--ff-mono); font-size: 9px;
  letter-spacing: .14em; text-transform: uppercase;
  padding: 3px 10px; border: 1px solid;
}
.article-cat.research { border-color: var(--violet); color: var(--violet); background: var(--violet-pale); }
.article-cat.engineering { border-color: var(--cobalt); color: var(--cobalt); background: var(--cobalt-pale); }
.article-cat.reflection { border-color: var(--amber); color: var(--amber); background: #fef3c7; }

.article-title {
  font-family: var(--ff-serif); font-size: clamp(26px, 4vw, 40px);
  line-height: 1.2; color: var(--ink); font-weight: 400;
  margin-bottom: 20px;
}
.article-lede {
  font-size: 17px; color: var(--ink-mid); line-height: 1.8;
  border-left: 3px solid var(--teal); padding-left: 20px;
  margin: 0;
}

.article-body { font-size: 15px; line-height: 1.9; color: var(--ink-mid); }
.article-body h2 {
  font-family: var(--ff-sans, var(--ff-mono)); font-size: 13px;
  letter-spacing: .16em; text-transform: uppercase; color: var(--ink);
  margin: 48px 0 16px; padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}
.article-body p { margin: 0 0 24px; }
.article-body strong { color: var(--ink); font-weight: 600; }
.article-body em { font-family: var(--ff-serif); font-size: 16px; font-style: italic; }
.article-body ul { margin: 0 0 24px; padding-left: 24px; }
.article-body ul li { margin-bottom: 10px; }
.article-body blockquote {
  margin: 32px 0; padding: 20px 24px;
  background: var(--bg-off); border-left: 3px solid var(--teal);
  font-size: 15px; color: var(--ink-mid);
}

.article-footer {
  margin-top: 64px; padding-top: 32px; padding-bottom: 64px;
  border-top: 1px solid var(--rule);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 16px;
}
.article-author {
  font-family: var(--ff-mono); font-size: 10px;
  letter-spacing: .1em; text-transform: uppercase; color: var(--ink-low);
}
.article-cta {
  font-family: var(--ff-mono); font-size: 10px;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--teal); text-decoration: none; border-bottom: 1px solid rgba(0,137,123,.3);
  transition: border-color .2s;
}
.article-cta:hover { border-color: var(--teal); }

@media (max-width: 768px) {
  .article-wrap { padding: 0 18px; }
  .article-title { font-size: 26px; }
  .article-lede { font-size: 15px; }
}