/* GEOLiNK · /blog/industrial-motherboard-selection-2026/ — checklist article
   Unique prefix: pg-bs- . No global class selectors in this file. */

/* ---- Hero: headline and six-cut index ---- */
.pg-bs-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(48px, 6vw, 90px) var(--gutter) clamp(40px, 5vw, 70px);
  border-bottom: 1px solid var(--line);
}
.pg-bs-hero-copy {
  max-width: 660px;
}
.pg-bs-hero-copy h1 {
  max-width: 15ch;
  margin: 0;
}
.pg-bs-hero-copy p {
  max-width: 54ch;
  margin-top: var(--space-5);
  color: var(--text-secondary);
}
.pg-bs-hero-copy > p:first-child {
  margin-top: 0;
  color: var(--accent-ink);
}
.pg-bs-hero-meta {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.pg-bs-hero-meta span {
  margin-inline: 7px;
  color: var(--accent-ink);
}
.pg-bs-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.pg-bs-hero-boundary {
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
  font-size: 12.5px;
}
.pg-bs-hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 0.58fr);
  gap: var(--space-5);
  align-items: end;
  padding: clamp(18px, 2.6vw, 30px);
  border: 1px solid var(--line);
  background:
    radial-gradient(70% 70% at 50% 45%, rgba(var(--color-white-rgb), 0.96), transparent 72%),
    linear-gradient(160deg, var(--panel-soft), rgba(var(--color-cyan-rgb), 0.1));
  box-shadow: var(--shadow-lift);
}
.pg-bs-hero-index {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}
.pg-bs-hero-index li {
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.pg-bs-hero-object {
  margin: 0;
}
.pg-bs-hero-object img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  filter: drop-shadow(var(--shadow-object));
}
.pg-bs-hero-object figcaption {
  margin-top: var(--space-3);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---- Premise ---- */
.pg-bs-premise-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(30px, 5vw, 64px);
  align-items: center;
}
.pg-bs-premise-copy h2 {
  max-width: 18ch;
  margin-top: var(--space-2);
}
.pg-bs-premise-copy p {
  max-width: 58ch;
  margin-top: var(--space-4);
  color: var(--text-secondary);
}
.pg-bs-premise-media {
  margin: 0;
  padding: clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--line);
  background:
    radial-gradient(70% 70% at 50% 50%, rgba(var(--color-white-rgb), 0.96), transparent 72%),
    var(--panel-soft);
  box-shadow: var(--shadow-raised);
}
.pg-bs-premise-media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: contain;
}
.pg-bs-premise-media figcaption {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--line-soft);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---- Six cuts ---- */
.pg-bs-flow {
  width: 100%;
  height: auto;
  margin-bottom: var(--space-7);
}
.pg-bs-flow-line {
  stroke: var(--line-strong);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}
.pg-bs-flow-node {
  fill: var(--color-lab-raised);
  stroke: var(--accent-strong);
  stroke-width: 1.5;
}
.pg-bs-flow-num {
  fill: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  text-anchor: middle;
}
.pg-bs-flow-label {
  fill: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  text-anchor: middle;
}
.pg-bs-cut-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
  list-style: none;
}
.pg-bs-cut {
  padding-top: var(--space-4);
  border-top: 2px solid var(--line);
}
.pg-bs-cut-num {
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}
.pg-bs-cut h3 {
  margin-top: var(--space-2);
  font-size: 18px;
}
.pg-bs-cut p {
  margin-top: var(--space-2);
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

/* ---- Matrix table ---- */
.pg-bs-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: rgba(var(--color-white-rgb), 0.76);
  box-shadow: var(--shadow-raised);
}
.pg-bs-table {
  width: 100%;
  min-width: 900px;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.pg-bs-table caption {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--line);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: var(--tracking-label);
  text-align: left;
  text-transform: uppercase;
}
.pg-bs-table th,
.pg-bs-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}
.pg-bs-table thead th {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.pg-bs-table tbody th {
  font-family: var(--font-mono);
  font-weight: 500;
  white-space: nowrap;
}
.pg-bs-table tbody tr:hover {
  background: rgba(var(--color-cyan-rgb), 0.05);
}
.pg-bs-plates-head {
  margin-top: var(--space-7);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}
.pg-bs-plates {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
  list-style: none;
}
.pg-bs-plates--four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: var(--space-4);
}
.pg-bs-plate figure {
  margin: 0;
}
.pg-bs-plate img {
  width: 100%;
  aspect-ratio: 1 / 1;
  padding: 10px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
  object-fit: contain;
}
.pg-bs-plate figcaption {
  margin-top: 6px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.04em;
  text-align: center;
  text-transform: uppercase;
}

/* ---- Cost case ---- */
.pg-bs-case-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(30px, 5vw, 66px);
  align-items: center;
}
.pg-bs-case-copy h2 {
  max-width: 20ch;
  margin-top: var(--space-2);
}
.pg-bs-case-copy p {
  max-width: 56ch;
  margin-top: var(--space-4);
  color: var(--text-secondary);
}
.pg-bs-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.pg-bs-metric {
  padding-top: var(--space-4);
  border-top: 2px solid var(--accent-strong);
}
.pg-bs-metric dt {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.pg-bs-metric dd {
  margin-top: var(--space-2);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.pg-bs-metric dd span {
  color: var(--text-secondary);
  font-size: 12px;
  letter-spacing: 0;
}
.pg-bs-case-media {
  margin: 0;
  padding: clamp(18px, 2.6vw, 30px);
  border: 1px solid var(--line);
  background:
    radial-gradient(70% 70% at 50% 50%, rgba(var(--color-white-rgb), 0.96), transparent 72%),
    var(--panel-soft);
  box-shadow: var(--shadow-lift);
}
.pg-bs-case-media img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  filter: drop-shadow(var(--shadow-object));
}
.pg-bs-case-media figcaption {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--line-soft);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---- FAQ ---- */
.pg-bs-faq-list {
  max-width: 860px;
  border-top: 1px solid var(--line);
}
.pg-bs-faq-item {
  border-bottom: 1px solid var(--line);
}
.pg-bs-faq-item summary {
  position: relative;
  padding: var(--space-4) 40px var(--space-4) 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.4;
  list-style: none;
}
.pg-bs-faq-item summary::-webkit-details-marker {
  display: none;
}
.pg-bs-faq-item summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 18px;
  transform: translateY(-50%);
}
.pg-bs-faq-item[open] summary::after {
  content: "−";
}
.pg-bs-faq-item p {
  max-width: 74ch;
  padding: 0 40px var(--space-4) 0;
  color: var(--text-secondary);
  font-size: 13.5px;
  line-height: 1.65;
}

/* ---- CTA ---- */
.pg-bs-cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-top: var(--space-7);
  border-top: 1px solid var(--line-strong);
}
.pg-bs-cta-inner h2 {
  max-width: 18ch;
  margin-top: var(--space-2);
}
.pg-bs-cta-inner p {
  max-width: 52ch;
  margin-top: var(--space-3);
  color: var(--text-secondary);
}

/* ---- Responsive ---- */
@media (max-width: 1020px) {
  .pg-bs-hero,
  .pg-bs-premise-grid,
  .pg-bs-case-grid {
    grid-template-columns: 1fr;
  }
  .pg-bs-hero-panel {
    max-width: 560px;
    width: 100%;
  }
  .pg-bs-cut-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .pg-bs-plates {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .pg-bs-plates--four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
@media (max-width: 700px) {
  .pg-bs-cut-list {
    grid-template-columns: 1fr;
  }
  .pg-bs-flow {
    display: none;
  }
  .pg-bs-metrics {
    grid-template-columns: 1fr;
  }
  .pg-bs-plates--four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .pg-bs-cta-inner {
    display: grid;
  }
}
@media (max-width: 480px) {
  .pg-bs-hero-panel {
    grid-template-columns: 1fr;
  }
  .pg-bs-hero-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 var(--space-4);
  }
  .pg-bs-plates {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}