/* ================================================================
   Sizing Guide Page: article content blocks and responsive details
   ================================================================ */

.sizing-guide-page .evidence-note {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: var(--surface);
  color: #3c4043;
  font-size: 0.92rem;
  line-height: 1.65;
}

.sizing-guide-page .evidence-note.success { border-left-color: var(--green); }

.sizing-guide-page .rule-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.sizing-guide-page .rule-grid-three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.sizing-guide-page .rule-card {
  padding: var(--space-4);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.sizing-guide-page .rule-number {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-bottom: var(--space-3);
  border-radius: 6px;
  background: var(--surface-alt);
  color: var(--accent-strong);
  font-size: 0.8rem;
  font-weight: 800;
}

.sizing-guide-page .rule-card h3 {
  margin: 0 0 var(--space-2);
  font-size: 0.98rem;
  line-height: 1.35;
}

.sizing-guide-page .rule-card p {
  margin: 0 0 var(--space-3);
  color: #3c4043;
  font-size: 0.85rem;
  line-height: 1.6;
}

.sizing-guide-page .rule-card a {
  font-size: 0.8rem;
  font-weight: 800;
}

.sizing-guide-page .science-stack,
.sizing-guide-page .size-detail-list,
.sizing-guide-page .specialty-list,
.sizing-guide-page .source-list {
  margin-top: var(--space-5);
  border-top: 1px solid var(--line);
}

.sizing-guide-page .science-row,
.sizing-guide-page .size-detail,
.sizing-guide-page .specialty-list article,
.sizing-guide-page .source-list article { border-bottom: 1px solid var(--line); }

.sizing-guide-page .science-row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: var(--space-5);
  padding: var(--space-4) 0;
}

.sizing-guide-page .science-row strong,
.sizing-guide-page .two-column-text h3,
.sizing-guide-page .specialty-list h3,
.sizing-guide-page .checklist-grid h3 {
  color: var(--text);
  font-size: 0.98rem;
}

.sizing-guide-page .science-row p {
  margin: 0;
  color: #3c4043;
  font-size: 0.9rem;
  line-height: 1.65;
}

.sizing-guide-page .formula-box {
  display: grid;
  gap: var(--space-1);
  margin-top: var(--space-5);
  padding: var(--space-4);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.sizing-guide-page .formula-box strong { color: var(--text); }
.sizing-guide-page .formula-box span {
  color: #3c4043;
  font-size: 0.9rem;
}

.sizing-guide-page .two-column-text {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-5);
}

.sizing-guide-page .two-column-text h3 { margin: 0 0 var(--space-2); }
.sizing-guide-page .two-column-text p {
  margin: 0;
  color: #3c4043;
}

.sizing-guide-page .size-detail {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr) 190px;
  gap: var(--space-5);
  padding: var(--space-5) 0;
}

.sizing-guide-page .size-name span {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sizing-guide-page .size-name strong {
  display: block;
  margin-top: var(--space-1);
  color: var(--text);
  font-size: 1rem;
}

.sizing-guide-page .size-copy p {
  margin: 0 0 var(--space-3);
  color: #3c4043;
}

.sizing-guide-page .size-copy ul,
.sizing-guide-page .specialty-list ul,
.sizing-guide-page .check-list {
  margin: 0;
  padding-left: 1.1rem;
  color: #3c4043;
}

.sizing-guide-page .size-copy li,
.sizing-guide-page .specialty-list li,
.sizing-guide-page .check-list li { margin-bottom: var(--space-2); }

.sizing-guide-page .size-copy li:last-child,
.sizing-guide-page .specialty-list li:last-child,
.sizing-guide-page .check-list li:last-child { margin-bottom: 0; }

.sizing-guide-page .size-metrics {
  display: grid;
  align-content: start;
  gap: var(--space-2);
}

.sizing-guide-page .size-metrics span {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: 6px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.sizing-guide-page .specialty-list article { padding: var(--space-5) 0; }
.sizing-guide-page .specialty-list h3 { margin: 0 0 var(--space-2); }

.sizing-guide-page .specialty-list p {
  max-width: 82ch;
  margin: 0 0 var(--space-3);
  color: #3c4043;
}

.sizing-guide-page .checklist-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.sizing-guide-page .checklist-grid section {
  padding: var(--space-4);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.sizing-guide-page .checklist-grid h3 { margin: 0 0 var(--space-3); }
.sizing-guide-page .faq-list { margin-top: var(--space-5); }

.sizing-guide-page .faq-item {
  border-radius: 8px;
  box-shadow: none;
}

.sizing-guide-page .faq-item summary { font-size: 0.95rem; }
.sizing-guide-page .faq-body { color: #3c4043; }

.sizing-guide-page .source-list article {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1fr) auto;
  gap: var(--space-4);
  align-items: start;
  padding: var(--space-4) 0;
}

.sizing-guide-page .source-list strong {
  color: var(--text);
  font-size: 0.9rem;
}

.sizing-guide-page .source-list p {
  margin: 0;
  color: #3c4043;
  font-size: 0.86rem;
  line-height: 1.55;
}

.sizing-guide-page .source-list a {
  white-space: nowrap;
  font-size: 0.82rem;
  font-weight: 800;
}

@media (max-width: 1180px) {
  .sizing-guide-page .rule-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 920px) {
  .sizing-guide-page .two-column-text,
  .sizing-guide-page .checklist-grid { grid-template-columns: 1fr; }
  .sizing-guide-page .science-row,
  .sizing-guide-page .size-detail,
  .sizing-guide-page .source-list article {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  .sizing-guide-page .size-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .sizing-guide-page .rule-grid,
  .sizing-guide-page .rule-grid-three,
  .sizing-guide-page .size-metrics { grid-template-columns: 1fr; }
}