/* ═══════════════════════════════════════════════
   BLOG ARTICLE BASE
   Keep this as assets/css/blog-post.css.
   This file defines article structure. Theme-specific refinements live in blog-minimal.css.
   ═══════════════════════════════════════════════ */
.article-hero {
  padding-top: clamp(8rem, 13vw, 11rem);
  padding-bottom: clamp(4rem, 7vw, 6rem);
  border-top: none;
  position: relative;
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 72% 18%, rgba(77,120,114,0.12), transparent 28rem),
    linear-gradient(to bottom, rgba(255,255,255,0.018), transparent 35%);
}

.article-hero .container {
  position: relative;
  z-index: 1;
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 2.2rem;
  transition: color 180ms ease, transform 180ms ease;
}

.article-back:hover {
  color: var(--accent-hi);
  transform: translateX(-3px);
}

.article-title {
  font-family: var(--f-disp);
  font-size: clamp(3.2rem, 8vw, 7.25rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.035em;
  color: var(--text);
  max-width: 11ch;
  margin-bottom: 2.4rem;
}

.article-title em {
  display: block;
  font-style: italic;
  color: var(--text-2);
}

.article-dek {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  font-weight: 300;
  line-height: 1.8;
  color: var(--text-2);
  max-width: 58ch;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 2rem;
}

.article-pill {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--line-hi);
  padding: 0.36rem 0.72rem;
}

.article-pill--active {
  color: var(--accent);
  border-color: var(--accent-bd);
}

.article-section {
  padding-top: clamp(4rem, 7vw, 6.5rem);
}

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(3rem, 6vw, 5rem);
  align-items: start;
}

.article-body {
  max-width: 780px;
  min-width: 0;
}

.article-body h2 {
  font-family: var(--f-disp);
  font-size: clamp(2rem, 3.6vw, 3rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--text);
  margin-top: 4rem;
  margin-bottom: 1.15rem;
  padding-top: 0.4rem;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-hi);
  margin-top: 2.4rem;
  margin-bottom: 0.8rem;
}

.article-body p,
.article-body li {
  font-size: 1.06rem;
  font-weight: 300;
  color: var(--text-2);
  line-height: 1.9;
}

.article-body p {
  margin-bottom: 1.2rem;
}

.article-body ul,
.article-body ol {
  padding-left: 1.35rem;
  margin: 0.4rem 0 1.6rem;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: 0.35rem;
  padding-left: 0.2rem;
}

.article-body a {
  color: var(--accent-hi);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.article-body strong {
  color: var(--text);
  font-weight: 400;
}

.article-body blockquote {
  margin: 1.6rem 0;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.024);
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body code:not(pre code) {
  font-family: var(--f-mono);
  font-size: 0.86em;
  color: var(--text);
  background: rgba(255,255,255,0.035);
  border: 1px solid var(--line);
  padding: 0.12rem 0.35rem;
}

.article-code {
  margin: 1.5rem 0 1.9rem;
  padding: 1.2rem 1.25rem;
  background: #050506;
  border: 1px solid var(--line-hi);
  border-left: 2px solid var(--accent);
  overflow-x: auto;
  box-shadow: 0 24px 80px rgba(0,0,0,0.24);
}

.article-code code {
  font-family: var(--f-mono);
  font-size: 0.86rem;
  line-height: 1.75;
  color: #aeb8b5;
  white-space: pre;
}

.article-figure {
  margin: 1.8rem 0 2.1rem;
}

.article-figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line-hi);
  background: var(--bg-surf);
}

.article-aside {
  position: sticky;
  top: 7rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1.25rem 0;
}

.article-aside-label {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-hi);
  margin-bottom: 0.7rem;
}

.article-aside-text {
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-2);
  margin-bottom: 1.3rem;
}

.article-toc {
  display: grid;
  gap: 0.55rem;
  margin-top: 1rem;
}

.article-toc a {
  font-family: var(--f-mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  line-height: 1.55;
  transition: color 180ms ease, transform 180ms ease;
}

.article-toc a:hover {
  color: var(--accent-hi);
  transform: translateX(3px);
}

.article-toc .toc-l3 {
  padding-left: 0.8rem;
  opacity: 0.82;
}

.article-toc-mobile {
  display: none;
}

.article-neighbors {
  display: flex;
  gap: 0.9rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  background: transparent;
}

.article-neighbor {
  flex: 1 1 0;
  min-width: 0;
  max-width: min(100%, 34rem);
  padding: 1.15rem;
  border: 1px solid var(--line-hi);
  background: rgba(255,255,255,0.018);
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.article-neighbor:hover {
  background: rgba(77,120,114,0.075);
  border-color: var(--accent-bd);
}

.article-neighbor--next {
  margin-left: auto;
  text-align: right;
}

.article-neighbor:not(.article-neighbor--next) {
  margin-right: auto;
}

.article-neighbor span {
  display: block;
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.45rem;
}

.article-neighbor strong {
  display: block;
  font-family: var(--f-disp);
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  font-weight: 300;
  line-height: 1.18;
  color: var(--text);
}

.article-neighbor:hover strong {
  color: var(--accent-hi);
}

@media (max-width: 900px) {
  .article-grid {
    grid-template-columns: 1fr;
  }

  .article-aside {
    position: static;
    order: -1;
  }
}

@media (max-width: 560px) {
  .article-title {
    max-width: 100%;
  }

  .article-toc--desktop,
  .article-toc-desktop-label {
    display: none;
  }

  .article-toc-mobile {
    display: block;
    margin-top: 1rem;
  }

  .article-toc-mobile summary {
    cursor: pointer;
    font-family: var(--f-mono);
    font-size: 0.66rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent-hi);
    list-style-position: outside;
  }

  .article-toc-mobile .article-toc {
    grid-template-columns: 1fr;
    margin-top: 1rem;
  }

  .article-code {
    margin-left: calc(-1 * var(--px));
    margin-right: calc(-1 * var(--px));
    border-left: none;
    border-right: none;
  }

  .article-figure {
    margin-left: calc(-1 * var(--px));
    margin-right: calc(-1 * var(--px));
  }

  .article-figure img {
    border-left: 0;
    border-right: 0;
  }

  .article-neighbors {
    flex-direction: column;
  }

  .article-neighbor,
  .article-neighbor--next {
    max-width: none;
    text-align: left;
    margin-left: 0;
  }
}