/* ===== BodyBuddy blog =====
   Loads after ../style.css, so header, footer, buttons, tokens and fonts are the site's own.
   This file only adds reading layout: the post list, the article, the table of contents. */

body { overflow-x: clip; }

.nav-link.is-current { color: var(--green); background: var(--green-soft); }

/* ---------- Blog index ---------- */

.blog-hero { padding: 72px 0 36px; }
.blog-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3.8rem, 11vw, 6rem);
  line-height: 0.95;
  color: var(--heading);
  padding-bottom: 18px;
  position: relative;
}
.blog-title::after,
.post-section h2::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  bottom: 0;
  width: 84px;
  height: 6px;
  border-radius: 3px;
  background: var(--green);
}
.blog-sub { font-size: 1.2rem; color: var(--text); margin-top: 14px; max-width: 520px; text-wrap: balance; }

.posts { padding-bottom: 96px; }

.post-feature {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: center;
  overflow: hidden;
  min-height: 420px;
  padding: 44px 48px 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: border-color 0.35s, background 0.35s;
}
.post-feature:hover { border-color: var(--green-line); background: #28303f; }
.post-feature-text { padding-bottom: 44px; }
.post-feature h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.6rem, 6vw, 4rem);
  line-height: 1;
  color: var(--heading);
  margin-bottom: 18px;
  text-wrap: balance;
}
.post-feature p { max-width: 52ch; margin-bottom: 26px; }
.read-meta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.chip {
  display: inline-block;
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid var(--green-line);
  border-radius: 999px;
  padding: 4px 16px;
  font-size: 0.82rem;
  font-weight: 700;
}
.read-more { display: inline-flex; align-items: center; gap: 8px; color: var(--green); font-weight: 700; }
.read-more svg { width: 18px; height: 18px; transition: transform 0.5s var(--ease-out); }
.post-feature:hover .read-more svg { transform: translateX(-6px); }

.post-feature-shot { align-self: end; justify-self: center; width: 250px; perspective: 1200px; }
.post-feature-shot img {
  width: 100%;
  height: auto;
  border-radius: 30px 30px 0 0;
  border: 8px solid #10151f;
  border-bottom: 0;
  transform: translateY(26px) rotateY(-8deg) rotateX(3deg);
  transition: transform 0.9s var(--ease-out);
  box-shadow: 0 0 0 1px var(--line), 0 40px 50px -26px rgba(0, 0, 0, 0.8);
}
.post-feature:hover .post-feature-shot img { transform: translateY(0) rotateY(-3deg) rotateX(0); }

/* ---------- Article ---------- */

.article-hero { padding: 48px 0 28px; max-width: 760px; }
.breadcrumb { font-size: 0.88rem; color: var(--text-2); margin-bottom: 26px; }
.breadcrumb a { color: var(--green); }
.breadcrumb a:hover { text-decoration: underline; text-underline-offset: 4px; }
.article-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3rem, 8vw, 5rem);
  line-height: 1.1;
  color: var(--heading);
  text-wrap: balance;
  margin-bottom: 18px;
}
.article-title span { color: var(--green); }
.article-sub { font-size: 1.25rem; color: var(--text); margin-bottom: 20px; text-wrap: balance; }

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 720px) 220px;
  justify-content: space-between;
  gap: 56px;
  align-items: start;
  padding-bottom: 72px;
}

.summary {
  background: var(--green-soft);
  border: 1px solid var(--green-line);
  border-radius: 16px;
  padding: 24px 28px;
  margin-bottom: 40px;
  font-size: 1.08rem;
  line-height: 1.8;
}
.summary strong { color: var(--green); }

.post-section { padding: 36px 0 12px; border-top: 1px solid var(--line); scroll-margin-top: 76px; }
.post-section:first-of-type { border-top: 0; padding-top: 0; }
.post-section h2 {
  position: relative;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3rem);
  line-height: 1.05;
  color: var(--heading);
  padding-bottom: 14px;
  margin-bottom: 20px;
}
.post-section h2::after { width: 56px; height: 5px; }
.post-section p, .post-section li { font-size: 1.08rem; line-height: 1.85; }
.post-section p { margin-bottom: 14px; max-width: 68ch; }
.post-section ul, .post-section ol { padding-inline-start: 24px; margin: 12px 0 16px; display: flex; flex-direction: column; gap: 10px; max-width: 68ch; }
.post-section li::marker { color: var(--green); font-weight: 700; }
.post-section strong { color: var(--heading); }

.formula {
  direction: ltr;
  text-align: left;
  background: var(--inner);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 18px;
  margin: 12px 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92rem;
  color: var(--heading);
  overflow-x: auto;
}
.formula small { display: block; color: var(--green); font-family: var(--font-body); font-size: 0.78rem; font-weight: 700; margin-bottom: 4px; }
.formula b { color: var(--green); }

.table-wrap { overflow-x: auto; margin: 14px 0 18px; border-radius: 12px; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 0.98rem; }
th, td { padding: 12px 16px; text-align: start; white-space: nowrap; }
th { background: var(--inner); color: var(--green); font-size: 0.82rem; }
td { border-top: 1px solid var(--line); }
td.num { color: var(--heading); font-weight: 700; font-variant-numeric: tabular-nums; }

.warning {
  margin-top: 36px;
  padding: 28px;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.32);
  border-radius: 16px;
}
.warning h2::after { background: #f87171; }

.toc { position: sticky; top: 92px; font-size: 0.92rem; }
.toc-title { font-family: var(--font-display); font-weight: 700; font-size: 1.6rem; color: var(--heading); margin-bottom: 12px; }
.toc ol { list-style: none; position: relative; padding-inline-start: 22px; display: grid; gap: 4px; }
.toc ol::before { content: ""; position: absolute; inset-block: 4px; inset-inline-start: 5px; width: 2px; background: var(--inner); border-radius: 1px; }
.toc a { display: block; color: var(--text-2); padding: 4px 0; line-height: 1.4; transition: color 0.3s; position: relative; }
.toc a::before { content: ""; position: absolute; inset-inline-start: -22px; top: 50%; width: 12px; height: 12px; margin-top: -6px; border-radius: 50%; background: var(--bg); border: 2px solid var(--inner); transition: background 0.3s, border-color 0.3s, transform 0.4s var(--ease-out); }
.toc a:hover { color: var(--text); }
.toc a.is-active { color: var(--heading); font-weight: 700; }
.toc a.is-active::before { background: var(--green); border-color: var(--green); transform: scale(1.2); }
.js .toc:empty { display: none; }

/* ---------- Article call to action ---------- */

.post-cta {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 32px;
  align-items: end;
  margin-top: 48px;
  padding: 40px 40px 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
}
.post-cta .cta-text { padding-bottom: 40px; align-self: center; }
.post-cta h2 { font-family: var(--font-display); font-weight: 700; font-size: clamp(2.2rem, 5vw, 3rem); line-height: 1.05; color: var(--heading); margin-bottom: 14px; }
.post-cta h2::after { display: none; }
.post-cta p { margin-bottom: 24px; max-width: 46ch; }
.post-cta .cta-shot img {
  width: 100%;
  height: auto;
  border-radius: 28px 28px 0 0;
  border: 7px solid #10151f;
  border-bottom: 0;
  transform: translateY(18px) rotateY(-8deg);
  box-shadow: 0 0 0 1px var(--line), 0 30px 40px -24px rgba(0, 0, 0, 0.8);
}

/* ---------- Reveal ---------- */

.js .post-section, .js .summary, .js .post-cta { opacity: 0; transform: translateY(26px); transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out); }
.js .post-section.is-visible, .js .summary.is-visible, .js .post-cta.is-visible { opacity: 1; transform: none; }
.js .post-feature { animation: fadeUp 0.9s var(--ease-out) 0.2s both; }

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .article-layout { grid-template-columns: minmax(0, 1fr); }
  .toc { display: none; }
}

@media (max-width: 720px) {
  .blog-hero { padding-top: 44px; }
  .post-feature { grid-template-columns: 1fr; padding: 28px 24px 0; min-height: 0; gap: 8px; }
  .post-feature-text { padding-bottom: 8px; }
  .post-feature-shot { width: 200px; margin-top: 12px; }
  .post-cta { grid-template-columns: 1fr; padding: 28px 24px 0; gap: 8px; }
  .post-cta .cta-text { padding-bottom: 8px; }
  .post-cta .cta-shot { width: 180px; justify-self: center; margin-top: 12px; }
  .warning { padding: 22px 20px; }
  .summary { padding: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  .js .post-section, .js .summary, .js .post-cta { opacity: 1; transform: none; }
  .post-feature-shot img, .post-cta .cta-shot img { transform: none; }
}

@media (max-width: 560px) {
  .nav-home { display: none; }
  .header-actions { gap: 6px; }
  .header-actions .btn-small { padding: 9px 16px; font-size: 0.82rem; }
}

/* no sideways scrolling on phones: tables and formulas wrap instead */
@media (max-width: 720px) {
  .table-wrap { overflow-x: visible; }
  table { font-size: 0.9rem; }
  th, td { white-space: normal; padding: 10px 12px; }
  .formula { overflow-x: visible; white-space: pre-wrap; overflow-wrap: anywhere; font-size: 0.82rem; }
}