/* ── Newsletter section — matches the palette and type of the main site ── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', sans-serif;
  background: #fafaf8;
  color: #1a1a1a;
  line-height: 1.7;
}
a { color: #1a56a0; text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

.container { max-width: 860px; margin: 0 auto; padding: 0 2rem; }
.container-narrow { max-width: 700px; margin: 0 auto; padding: 0 2rem; }

/* ── Navigation (mirrors the main site) ── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e8e8e4;
}
nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.nav-brand {
  font-family: 'Lora', serif; font-weight: 600; font-size: 1.05rem;
  color: #1a1a1a; letter-spacing: -0.01em;
}
.nav-brand a { color: #1a1a1a; }
.nav-brand a:hover { text-decoration: none; }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a { font-size: 0.875rem; font-weight: 500; color: #444; letter-spacing: 0.01em; }
.nav-links a:hover { color: #1a56a0; text-decoration: none; }
.nav-links a.current { color: #1a56a0; }

/* ── Breadcrumb ── */
.crumb { font-size: 0.8rem; color: #8a8a80; padding-top: 2.2rem; }
.crumb a { color: #8a8a80; }
.crumb a:hover { color: #1a56a0; text-decoration: none; }
.crumb .sep { color: #ccc; padding: 0 0.45rem; }

/* ── Page header ── */
.page-head { padding: 1.4rem 0 2.6rem; }
.page-title {
  font-family: 'Lora', serif; font-size: 2.1rem; font-weight: 600;
  letter-spacing: -0.02em; line-height: 1.25; color: #111; margin-bottom: 0.6rem;
}
.page-intro { font-size: 0.975rem; color: #555; line-height: 1.8; max-width: 62ch; }

/* ── Series cards (hub) ── */
.series-list { list-style: none; display: flex; flex-direction: column; gap: 2.4rem; }
.series-item {
  display: grid; grid-template-columns: 104px minmax(0, 1fr);
  gap: 1.5rem; align-items: start;
}
.series-cover { width: 104px; border-radius: 3px; box-shadow: 0 1px 6px rgba(0,0,0,0.14); background: #ececE8; }
.series-name {
  font-family: 'Lora', serif; font-size: 1.15rem; font-weight: 600;
  color: #111; line-height: 1.35; letter-spacing: -0.01em; margin-bottom: 0.25rem;
}
.series-name a { color: #111; }
.series-name a:hover { color: #1a56a0; text-decoration: none; }
.series-meta { font-size: 0.8rem; color: #8a8a80; margin-bottom: 0.6rem; }
.series-meta .sep { color: #ccc; padding: 0 0.4rem; }
.series-desc { font-size: 0.875rem; color: #555; line-height: 1.75; margin-bottom: 0.7rem; }
.series-links { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.series-links a { font-size: 0.8rem; font-weight: 500; }

.tag {
  display: inline-block; font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase;
  border-radius: 3px; padding: 0.1rem 0.4rem; margin-right: 0.55rem;
}
.tag-active { color: #2d7a3a; background: #e6f4ea; }
.tag-planned { color: #7a7a72; background: #f0f0ea; }
.tag-book { color: #1a56a0; background: #eef3fb; }

/* ── Issue list (series archive) ── */
.issue-list { list-style: none; display: flex; flex-direction: column; gap: 0; }
.issue-item { padding: 1.5rem 0; border-top: 1px solid #ececE8; }
.issue-item:first-child { border-top: none; }
.issue-num {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: #8a8a80; margin-bottom: 0.3rem;
}
.issue-title { font-size: 1.02rem; font-weight: 500; color: #111; line-height: 1.5; margin-bottom: 0.3rem; }
.issue-title a { color: #111; }
.issue-title a:hover { color: #1a56a0; text-decoration: none; }
.issue-meta { font-size: 0.8rem; color: #8a8a80; margin-bottom: 0.45rem; }
.issue-meta .sep { color: #ccc; padding: 0 0.4rem; }
.issue-summary { font-size: 0.875rem; color: #555; line-height: 1.75; }

.empty-note {
  font-size: 0.9rem; color: #888; background: #f4f4f0;
  border: 1px solid #ececE8; border-radius: 6px; padding: 1.1rem 1.3rem;
}

/* ── Article ── */
.article-head { padding: 1.2rem 0 2rem; border-bottom: 1px solid #e8e8e4; margin-bottom: 2.4rem; }
.article-kicker {
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: #1a56a0; margin-bottom: 0.7rem;
}
.article-title {
  font-family: 'Lora', serif; font-size: 2.15rem; font-weight: 600;
  letter-spacing: -0.02em; line-height: 1.22; color: #111; margin-bottom: 0.8rem;
}
.article-meta { font-size: 0.82rem; color: #8a8a80; }
.article-meta .sep { color: #ccc; padding: 0 0.45rem; }

.article-body { font-family: 'Lora', serif; font-size: 1.06rem; line-height: 1.85; color: #262626; }
.article-body p { margin-bottom: 1.35rem; }
.article-body h2 {
  font-family: 'Lora', serif; font-size: 1.35rem; font-weight: 600;
  color: #111; letter-spacing: -0.015em;
  margin: 2.6rem 0 1rem; line-height: 1.35;
}
.article-body em { font-style: italic; }
.article-body strong { font-weight: 600; color: #111; }
.article-body a { font-weight: 500; }
.article-body .lede { font-size: 1.12rem; color: #1a1a1a; }
.article-body blockquote {
  border-left: 3px solid #d8dde6; padding-left: 1.2rem;
  color: #555; font-style: italic; margin: 0 0 1.35rem;
}
.article-sign {
  font-family: 'Lora', serif; font-style: italic; color: #666;
  font-size: 0.975rem; line-height: 1.6; margin-top: 2.2rem;
}

/* ── Figures inside an article ── */
.article-body figure { margin: 2rem 0 2.2rem; }
.article-body figure picture { display: block; }
.article-body figure img {
  width: 100%; border: 1px solid #ececE8; border-radius: 6px; background: #fff;
}
.article-body figcaption {
  font-family: 'Inter', sans-serif; font-size: 0.82rem; color: #8a8a80;
  line-height: 1.65; margin-top: 0.7rem;
}

/* ── Code inside an article ── */
.article-body pre {
  background: #0d1826; color: #e6edf5;
  padding: 1.1rem 1.3rem; border-radius: 6px;
  overflow-x: auto; margin: 0 0 1.35rem;
  font-size: 0.84rem; line-height: 1.65;
  -webkit-overflow-scrolling: touch;
}
.article-body pre code {
  font-family: ui-monospace, 'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
  background: none; color: inherit; padding: 0; font-size: inherit;
}
.article-body :not(pre) > code {
  font-family: ui-monospace, 'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
  background: #f0f0ea; color: #2b3440;
  border-radius: 3px; padding: 0.1em 0.35em; font-size: 0.86em;
}

/* ── Article subtitle ── */
.article-subtitle {
  font-family: 'Inter', sans-serif; font-size: 1rem; font-weight: 400;
  color: #555; line-height: 1.6; margin: -0.35rem 0 0.85rem; max-width: 54ch;
}

/* ── Wide diagrams: legible on a phone ── */
.article-body figure a { display: block; }
.article-body figure .figure-scroll { display: block; }
@media (max-width: 640px) {
  .article-body figure.figure-wide .figure-scroll {
    overflow-x: auto; -webkit-overflow-scrolling: touch;
    border: 1px solid #ececE8; border-radius: 6px; background: #fff;
  }
  .article-body figure.figure-wide .figure-scroll img {
    width: auto; max-width: none; height: 250px; border: 0; border-radius: 0;
  }
  .article-body figure.figure-wide figcaption::after {
    content: " Swipe the diagram to see all of it, or tap it to open full size.";
  }
}

/* ── Call-to-action block ── */
.cta {
  background: #fff; border: 1px solid #e5e5e0; border-radius: 8px;
  padding: 1.5rem 1.7rem; margin: 2.8rem 0 0;
  font-family: 'Inter', sans-serif;
}
.cta-title { font-size: 0.95rem; font-weight: 600; color: #111; margin-bottom: 0.5rem; }
.cta p { font-size: 0.9rem; color: #555; line-height: 1.7; margin-bottom: 0.9rem; }
.cta p:last-child { margin-bottom: 0; }
.cta-links { display: flex; gap: 0.7rem; flex-wrap: wrap; margin-top: 0.2rem; }
.btn {
  display: inline-block; padding: 0.45rem 1.1rem; border-radius: 4px;
  font-size: 0.85rem; font-weight: 500; letter-spacing: 0.01em;
  transition: background 0.15s, color 0.15s;
}
.btn-primary { background: #1a56a0; color: #fff; border: 1px solid #1a56a0; }
.btn-primary:hover { background: #154a8c; text-decoration: none; }
.btn-outline { background: transparent; color: #1a56a0; border: 1px solid #1a56a0; }
.btn-outline:hover { background: #eef3fb; text-decoration: none; }

/* ── Prev / next ── */
.issue-nav {
  display: flex; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap;
  border-top: 1px solid #e8e8e4; margin-top: 3rem; padding-top: 1.6rem;
  font-size: 0.85rem;
}
.issue-nav span { color: #bbb; }

/* ── Footer ── */
footer { border-top: 1px solid #e8e8e4; padding: 2.5rem 0; margin-top: 3.5rem; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer-name { font-family: 'Lora', serif; font-size: 0.95rem; color: #111; }
.footer-email { font-size: 0.85rem; color: #888; }
.footer-copy { font-size: 0.8rem; color: #aaa; }

/* ── Responsive ── */
@media (max-width: 900px) {
  nav .container { height: auto; padding-top: 0.5rem; padding-bottom: 0.5rem; flex-wrap: wrap; }
  .nav-links { flex-wrap: wrap; gap: 0.4rem 1.1rem; }
}
@media (max-width: 620px) {
  .article-title { font-size: 1.7rem; }
  .page-title { font-size: 1.7rem; }
  .article-body { font-size: 1.02rem; }
  .series-item { grid-template-columns: 84px minmax(0, 1fr); gap: 1.1rem; }
  .series-cover { width: 84px; }
}