/* Lubechem Insights — Apple-inspired article system
   Type: system UI, optical tracking, tight display leading.
   Motion: press feedback, interruptible opacity, reduced-motion fallbacks.
   Materials: translucent chrome; content scrolls underneath. */

body.lc-blog-page {
  background: #f5f5f7;
}
body.lc-blog-page #main-content,
body.lc-blog-page main {
  background: #f5f5f7;
}

.lc-blog {
  --lc-bg: #f5f5f7;
  --lc-paper: #ffffff;
  --lc-ink: #1d1d1f;
  --lc-secondary: #6e6e73;
  --lc-tertiary: #86868b;
  --lc-line: rgba(0, 0, 0, 0.08);
  --lc-fill: rgba(0, 0, 0, 0.04);
  --lc-accent: #1d4f3a;
  --lc-accent-2: #248a3d;
  --lc-max: 720px;
  --lc-wide: 1080px;
  color: var(--lc-ink);
  background: var(--lc-bg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", system-ui, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.58;
  -webkit-font-smoothing: antialiased;
}

.lc-blog *,
.lc-blog *::before,
.lc-blog *::after { box-sizing: border-box; }

.lc-blog a {
  color: var(--lc-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
.lc-blog a:hover { color: var(--lc-accent-2); }

.lc-blog-progress {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 2px;
  background: transparent;
}
.lc-blog-progress > span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--lc-ink);
  transform-origin: left center;
}

.lc-blog-hero,
.lc-blog-body,
.lc-blog-hub {
  padding-left: max(1.25rem, env(safe-area-inset-left));
  padding-right: max(1.25rem, env(safe-area-inset-right));
}

.lc-blog-hero {
  padding-top: 3.5rem;
  padding-bottom: 2rem;
  max-width: var(--lc-max);
  margin: 0 auto;
}

.lc-blog-crumb {
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--lc-secondary);
  margin: 0 0 1.25rem;
}
.lc-blog-crumb a { color: inherit; text-decoration: none; }
.lc-blog-crumb a:hover { text-decoration: underline; }
.lc-blog-crumb span { margin: 0 0.4rem; color: var(--lc-tertiary); }

.lc-blog-kicker {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lc-secondary);
  margin: 0 0 0.75rem;
}

.lc-blog-hero h1 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", system-ui, sans-serif;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.028em;
  font-weight: 600;
  margin: 0 0 1rem;
  color: var(--lc-ink);
}

.lc-blog-dek {
  font-size: 1.25rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--lc-secondary);
  margin: 0 0 1.5rem;
}

.lc-blog-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.25rem;
  font-size: 0.875rem;
  color: var(--lc-secondary);
  margin: 0 0 1.75rem;
}
.lc-blog-byline strong { color: var(--lc-ink); font-weight: 600; }

.lc-blog-figure {
  margin: 0 auto 2.5rem;
  max-width: var(--lc-wide);
  padding: 0 max(1.25rem, env(safe-area-inset-left));
}
.lc-blog-figure picture,
.lc-blog-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  background: var(--lc-fill);
}
.lc-blog-figure figcaption {
  margin-top: 0.65rem;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--lc-tertiary);
}

.lc-blog-body {
  max-width: var(--lc-max);
  margin: 0 auto;
  padding-bottom: 4rem;
}

.lc-blog-answer {
  background: var(--lc-paper);
  border-radius: 18px;
  padding: 1.35rem 1.4rem;
  margin: 0 0 2.25rem;
}
.lc-blog-answer p:first-child {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lc-secondary);
  margin: 0 0 0.5rem;
}
.lc-blog-answer p:last-child { margin: 0; }

.lc-blog-takeaways {
  margin: 0 0 2.5rem;
  padding: 0;
  list-style: none;
}
.lc-blog-takeaways li {
  padding: 0.85rem 0;
  border-top: 1px solid var(--lc-line);
  font-size: 1rem;
}
.lc-blog-takeaways li:last-child { border-bottom: 1px solid var(--lc-line); }

.lc-blog-sec { margin: 0 0 2.4rem; }
.lc-blog-sec h2 {
  font-size: 1.7rem;
  line-height: 1.15;
  letter-spacing: -0.022em;
  font-weight: 600;
  margin: 0 0 0.85rem;
}
.lc-blog-sec h3 {
  font-size: 1.2rem;
  letter-spacing: -0.015em;
  font-weight: 600;
  margin: 1.4rem 0 0.55rem;
}
.lc-blog-sec p { margin: 0 0 1rem; }
.lc-blog-sec ul, .lc-blog-sec ol { margin: 0 0 1rem; padding-left: 1.2rem; }
.lc-blog-sec li { margin: 0 0 0.4rem; }

.lc-blog-table-wrap {
  overflow-x: auto;
  margin: 1.25rem 0 1.5rem;
  -webkit-overflow-scrolling: touch;
}
.lc-blog-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--lc-paper);
  border-radius: 14px;
  overflow: hidden;
}
.lc-blog-table th,
.lc-blog-table td {
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--lc-line);
  vertical-align: top;
}
.lc-blog-table th {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--lc-secondary);
  font-weight: 600;
  background: var(--lc-fill);
}
.lc-blog-table tr:last-child td { border-bottom: 0; }

.lc-blog-callout {
  background: var(--lc-paper);
  border-radius: 16px;
  padding: 1.1rem 1.2rem;
  margin: 1.2rem 0;
  font-size: 0.95rem;
  color: var(--lc-secondary);
}

.lc-blog-faq details {
  border-top: 1px solid var(--lc-line);
  padding: 0.9rem 0;
}
.lc-blog-faq details:last-child { border-bottom: 1px solid var(--lc-line); }
.lc-blog-faq summary {
  cursor: pointer;
  font-weight: 600;
  letter-spacing: -0.01em;
  list-style: none;
}
.lc-blog-faq summary::-webkit-details-marker { display: none; }
.lc-blog-faq summary:active { transform: scale(0.99); }
.lc-blog-faq details p { margin: 0.55rem 0 0; color: var(--lc-secondary); }

.lc-blog-cite {
  font-size: 0.88rem;
  color: var(--lc-secondary);
}
.lc-blog-cite li { margin: 0 0 0.4rem; }

.lc-blog-cta {
  margin: 2.5rem 0 0;
  padding: 1.6rem;
  background: var(--lc-ink);
  color: #f5f5f7;
  border-radius: 22px;
}
.lc-blog-cta h2 {
  color: inherit;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}
.lc-blog-cta p { color: rgba(245, 245, 247, 0.72); margin: 0 0 1.1rem; }
.lc-blog-btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.7rem 1.15rem;
  border-radius: 980px;
  background: #fff;
  color: var(--lc-ink);
  font-weight: 600;
  text-decoration: none;
  transition: transform 100ms ease-out, opacity 160ms ease;
}
.lc-blog-btn:hover { color: var(--lc-ink); opacity: 0.88; }
.lc-blog-btn:active { transform: scale(0.97); }

.lc-blog-related {
  display: grid;
  gap: 0.75rem;
  margin: 2.2rem 0 0;
}
.lc-blog-related a {
  display: block;
  background: var(--lc-paper);
  border-radius: 16px;
  padding: 1rem 1.1rem;
  text-decoration: none;
  color: inherit;
  transition: transform 100ms ease-out;
}
.lc-blog-related a:active { transform: scale(0.99); }
.lc-blog-related small {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--lc-tertiary);
  margin-bottom: 0.3rem;
}
.lc-blog-related strong { display: block; letter-spacing: -0.015em; }

/* Hub */
.lc-blog-hub { max-width: var(--lc-wide); margin: 0 auto; padding-top: 3.5rem; padding-bottom: 4.5rem; }
.lc-blog-hub-head { max-width: 760px; margin: 0 0 2.5rem; }
.lc-blog-hub-head h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 0 0 0.9rem;
}
.lc-blog-hub-head p {
  font-size: 1.25rem;
  line-height: 1.4;
  color: var(--lc-secondary);
  margin: 0;
}

.lc-blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 1.75rem;
}
.lc-blog-filters a,
.lc-blog-filters span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.35rem 0.85rem;
  border-radius: 980px;
  background: var(--lc-fill);
  color: var(--lc-ink);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}
.lc-blog-filters a:active { transform: scale(0.97); }
.lc-blog-filters .is-on { background: var(--lc-ink); color: #fff; }

.lc-blog-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
}
.lc-blog-card {
  display: flex;
  flex-direction: column;
  background: var(--lc-paper);
  border-radius: 22px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 100ms ease-out;
}
.lc-blog-card:active { transform: scale(0.99); }
.lc-blog-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--lc-fill);
}
.lc-blog-card-body { padding: 1.1rem 1.15rem 1.3rem; }
.lc-blog-card-body small {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--lc-tertiary);
  margin-bottom: 0.4rem;
}
.lc-blog-card-body h2 {
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 0.45rem;
  font-weight: 600;
}
.lc-blog-card-body p {
  margin: 0;
  color: var(--lc-secondary);
  font-size: 0.95rem;
}

.lc-blog-card.feature { grid-column: 1 / -1; display: grid; grid-template-columns: 1.15fr 1fr; }
.lc-blog-card.feature img { height: 100%; min-height: 280px; }

@media (max-width: 760px) {
  .lc-blog-grid,
  .lc-blog-card.feature { grid-template-columns: 1fr; }
  .lc-blog-hero h1 { font-size: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  .lc-blog-btn,
  .lc-blog-card,
  .lc-blog-related a,
  .lc-blog-faq summary { transition: none; transform: none !important; }
}

@media (prefers-reduced-transparency: reduce) {
  .lc-blog-answer,
  .lc-blog-card,
  .lc-blog-cta { background: #fff; }
}

@media (prefers-contrast: more) {
  .lc-blog { --lc-line: #1d1d1f; --lc-secondary: #3a3a3c; }
  .lc-blog-table, .lc-blog-card, .lc-blog-answer { border: 1px solid #1d1d1f; }
}