/* ─── Guide article styles (supplements ../style.css) ──────────────────────── */

/* Breadcrumb */
.breadcrumb {
  max-width: 1100px;
  margin: 0 auto;
  padding: .9rem 1.5rem;
  font-size: .8rem;
  color: var(--clr-muted);
  display: flex;
  align-items: center;
  gap: .4rem;
}
.breadcrumb a { color: var(--clr-muted); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--clr-accent); }
.breadcrumb__sep { opacity: .4; }
.breadcrumb__current { color: var(--clr-text); }

/* Guide hero */
.guide-hero {
  background: linear-gradient(135deg, #0f1520 0%, #161a23 60%, #1a2540 100%);
  border-bottom: 1px solid var(--clr-border);
  padding: 3.5rem 1.5rem 3rem;
}
.guide-hero__inner { max-width: 760px; margin: 0 auto; }
.guide-hero__inner h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.03em;
  margin-bottom: .75rem;
}
.guide-hero__sub { font-size: 1.05rem; color: var(--clr-muted); margin-bottom: 1.2rem; max-width: 580px; }
.guide-meta { display: flex; gap: 1.2rem; flex-wrap: wrap; font-size: .8rem; color: var(--clr-muted); }
.guide-meta span { display: flex; align-items: center; gap: .3rem; }

/* Layout */
.guide-layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 3rem;
  align-items: start;
}

/* Article */
.guide-article { min-width: 0; }
.guide-section { margin-bottom: 2.8rem; }
.guide-section:last-child { margin-bottom: 0; }

.guide-section h2 {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--clr-text);
  margin-bottom: 1rem;
  padding-bottom: .6rem;
  border-bottom: 2px solid var(--clr-accent);
  display: inline-block;
}
.guide-section h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 1.2rem 0 .5rem;
  color: var(--clr-text);
}
.guide-section p { color: var(--clr-muted); font-size: .95rem; margin-bottom: .8rem; line-height: 1.75; }
.guide-section p:last-child { margin-bottom: 0; }
.guide-section ul, .guide-section ol {
  color: var(--clr-muted);
  font-size: .93rem;
  padding-left: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  margin-bottom: .8rem;
}
.guide-section li { line-height: 1.6; }
.guide-section strong { color: var(--clr-text); font-weight: 700; }
.guide-section a { color: var(--clr-accent); text-decoration: underline; text-underline-offset: 3px; }

/* Key-fact callout box */
.callout {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-left: 3px solid var(--clr-accent);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  margin: 1rem 0;
  font-size: .9rem;
  color: var(--clr-muted);
}
.callout strong { color: var(--clr-accent); }
.callout--green { border-left-color: var(--clr-green); }
.callout--green strong { color: var(--clr-green); }
.callout--orange { border-left-color: var(--clr-orange); }
.callout--orange strong { color: var(--clr-orange); }
.callout--red { border-left-color: var(--clr-red); }
.callout--red strong { color: var(--clr-red); }

/* Science badge */
.sci-badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  background: rgba(62,207,142,.1);
  border: 1px solid rgba(62,207,142,.25);
  color: var(--clr-green);
  border-radius: 100px;
  font-size: .72rem;
  font-weight: 700;
  padding: .2rem .65rem;
  margin-bottom: .75rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* Dosage card */
.dosage-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 1rem; margin: 1rem 0; }
.dosage-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.2rem 1rem;
  text-align: center;
}
.dosage-card__amount { font-size: 1.7rem; font-weight: 800; color: var(--clr-accent); line-height: 1; margin-bottom: .25rem; }
.dosage-card__label { font-size: .78rem; font-weight: 700; color: var(--clr-text); margin-bottom: .25rem; }
.dosage-card__note { font-size: .74rem; color: var(--clr-muted); }

/* How-it-works steps */
.mechanism-list { display: flex; flex-direction: column; gap: .75rem; margin: 1rem 0; }
.mechanism-step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: .9rem 1rem;
}
.mechanism-step__num {
  width: 1.8rem; height: 1.8rem;
  background: var(--clr-accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: .8rem; color: #fff;
  flex-shrink: 0;
}
.mechanism-step__text { font-size: .88rem; color: var(--clr-muted); line-height: 1.55; }
.mechanism-step__text strong { color: var(--clr-text); }

/* Brand cards */
.brand-grid { display: flex; flex-direction: column; gap: 1rem; margin: 1rem 0; }
.brand-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  display: grid;
  grid-template-columns: 2.2rem 1fr auto;
  gap: 1rem;
  align-items: center;
  transition: border-color var(--transition);
}
.brand-card:hover { border-color: var(--clr-accent); }
.brand-card__rank {
  width: 2.2rem; height: 2.2rem;
  border-radius: 50%;
  background: var(--clr-accent-dim);
  color: var(--clr-accent);
  font-weight: 800; font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.brand-card__rank--gold { background: rgba(247,217,79,.15); color: #f7d94f; }
.brand-card__rank--silver { background: rgba(180,190,210,.1); color: #b4bed2; }
.brand-card__rank--bronze { background: rgba(247,147,79,.1); color: var(--clr-orange); }
.brand-card__name { font-weight: 700; font-size: .95rem; margin-bottom: .2rem; }
.brand-card__why { font-size: .8rem; color: var(--clr-muted); margin-bottom: .4rem; }
.brand-card__tags { display: flex; gap: .4rem; flex-wrap: wrap; }
.brand-tag {
  font-size: .68rem; font-weight: 600; padding: .15rem .5rem;
  border-radius: 100px; background: var(--clr-surface2); color: var(--clr-muted);
  border: 1px solid var(--clr-border);
}
.brand-card__cta {
  white-space: nowrap;
  font-size: .8rem;
  padding: .5rem .9rem;
  border-radius: var(--radius-sm);
  background: var(--clr-accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: .1rem;
  transition: background var(--transition);
}
.brand-card__cta:hover { background: #6ba3ff; }
.brand-card__cta-note { font-size: .62rem; font-weight: 400; opacity: .75; }
.affiliate-banner {
  background: var(--clr-surface2);
  border: 1px dashed var(--clr-border);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
  font-size: .8rem;
  color: var(--clr-muted);
  text-align: center;
  margin-top: .5rem;
}

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: .5rem; margin-top: .5rem; }
details.faq-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition);
}
details.faq-item[open] { border-color: var(--clr-accent); }
details.faq-item summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .9rem 1.1rem;
  font-weight: 700;
  font-size: .9rem;
  cursor: pointer;
  user-select: none;
  gap: .75rem;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after {
  content: '+';
  font-size: 1.1rem;
  color: var(--clr-accent);
  flex-shrink: 0;
  transition: transform var(--transition);
  font-weight: 400;
}
details.faq-item[open] summary::after { content: '−'; }
.faq-body { padding: 0 1.1rem 1rem; font-size: .88rem; color: var(--clr-muted); line-height: 1.7; border-top: 1px solid var(--clr-border); }
.faq-body p { margin-top: .75rem; }
.faq-body strong { color: var(--clr-text); }

/* Sticky sidebar */
.guide-sidebar { position: sticky; top: 90px; display: flex; flex-direction: column; gap: 1.25rem; }
.guide-toc {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
}
.guide-toc h4 { font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; color: var(--clr-muted); margin-bottom: .75rem; }
.guide-toc ul { list-style: none; display: flex; flex-direction: column; gap: .1rem; }
.guide-toc a {
  display: block;
  font-size: .84rem;
  color: var(--clr-muted);
  padding: .35rem .5rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
  text-decoration: none;
  border-left: 2px solid transparent;
}
.guide-toc a:hover, .guide-toc a.toc-active { color: var(--clr-accent); background: var(--clr-surface2); border-left-color: var(--clr-accent); }
.guide-cta-box {
  background: linear-gradient(135deg, var(--clr-accent-dim), var(--clr-surface));
  border: 1px solid rgba(79,142,247,.3);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  text-align: center;
}
.guide-cta-box p { font-size: .85rem; color: var(--clr-muted); margin-bottom: .8rem; line-height: 1.5; }
.guide-cta-box strong { color: var(--clr-text); display: block; margin-bottom: .3rem; font-size: .95rem; }

/* Related guides */
.related-guides { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: .75rem; margin-top: 1rem; }
.related-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: .3rem;
}
.related-card:hover { border-color: var(--clr-accent); transform: translateY(-2px); }
.related-card__icon { font-size: 1.4rem; }
.related-card__name { font-size: .88rem; font-weight: 700; color: var(--clr-text); }
.related-card__sub { font-size: .75rem; color: var(--clr-muted); }

/* Responsive */
@media (max-width: 860px) {
  .guide-layout { grid-template-columns: 1fr; }
  .guide-sidebar { position: static; }
  .guide-toc { display: none; }
  .brand-card { grid-template-columns: 2.2rem 1fr; }
  .brand-card__cta { grid-column: 1/-1; }
}
@media (max-width: 540px) {
  .guide-hero { padding: 2.5rem 1rem 2rem; }
  .guide-layout { padding: 1.5rem 1rem 3rem; }
  .dosage-grid { grid-template-columns: 1fr 1fr; }
}

/* TOC scroll-spy active */
.toc-active { color: var(--clr-accent) !important; border-left-color: var(--clr-accent) !important; }

/* Byline link in hero */
.guide-meta a { color: var(--clr-accent); text-decoration: none; }
.guide-meta a:hover { text-decoration: underline; }

/* Inline citation superscript */
sup.cite { font-size: .65em; line-height: 0; }
sup.cite a { color: var(--clr-accent); text-decoration: none; font-weight: 700; padding: 0 .1em; }
sup.cite a:hover { text-decoration: underline; }

/* References list (overrides flex list styling for numbered markers) */
.ref-list {
  display: block;
  list-style: decimal;
  padding-left: 1.4rem;
  font-size: .82rem;
  color: var(--clr-muted);
}
.ref-list li { line-height: 1.55; margin-bottom: .6rem; }
.ref-list li:last-child { margin-bottom: 0; }
.ref-list em { color: var(--clr-text); font-style: italic; }
.ref-list a { color: var(--clr-accent); }

/* Author box */
.guide-author {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
}
.guide-author__avatar {
  width: 3rem; height: 3rem;
  border-radius: 50%;
  background: var(--clr-accent-dim);
  color: var(--clr-accent);
  font-weight: 800; font-size: .95rem;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.guide-author__label { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--clr-muted); font-weight: 700; }
.guide-author__name { display: block; font-size: 1rem; color: var(--clr-text); margin: .1rem 0 .45rem; }
.guide-author__body p { font-size: .85rem; color: var(--clr-muted); line-height: 1.65; margin: 0; }