/* ==========================================================================
   GEOLiNK · /motherboards/nano-itx/ — page styles
   Prefix: .fna- (NANO-ITX hub). No global class selectors.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1 · Hero — split text / media
   -------------------------------------------------------------------------- */
.fna-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(720px 420px at 88% 18%, rgba(66, 126, 198, 0.12), transparent 68%),
    linear-gradient(180deg, var(--color-lab-raised) 0%, var(--color-ice-deep) 62%, var(--color-ice-soft) 100%);
}

.fna-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(28px, 4.5vw, 64px);
  align-items: center;
  padding-block: clamp(48px, 6.5vw, 88px);
}

.fna-hero-copy {
  position: relative;
  padding-left: clamp(16px, 2vw, 28px);
  border-left: 1px solid var(--accent);
}

.fna-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-transform: uppercase;
}

.fna-eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.fna-hero-title {
  max-width: 14ch;
  font-family: var(--font-display);
  font-size: clamp(42px, 5.6vw, 72px);
  font-weight: 300;
  letter-spacing: -0.025em;
  line-height: 1.02;
}

.fna-hero-lead {
  max-width: 48ch;
  margin-top: 18px;
  color: var(--text-secondary);
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.6;
}

.fna-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.fna-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  margin-top: 30px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  list-style: none;
}

.fna-hero-facts li {
  display: grid;
  gap: 3px;
}

.fna-fact-key {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.fna-fact-val {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.fna-hero-panel {
  position: relative;
  display: grid;
  place-items: center;
  margin: 0;
  padding: clamp(22px, 3vw, 40px);
  border: 1px solid var(--line);
  background:
    radial-gradient(70% 62% at 50% 44%, rgba(255, 255, 255, 0.96), transparent 72%),
    var(--gradient-ice);
  box-shadow: var(--shadow-raised);
}

.fna-hero-panel img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 22px 26px rgba(43, 52, 56, 0.18));
}

.fna-panel-rule {
  position: absolute;
  background: var(--accent);
  opacity: 0.42;
}

.fna-panel-rule--x {
  top: 14px;
  right: 14px;
  left: 14px;
  height: 1px;
}

.fna-panel-rule--y {
  top: 14px;
  bottom: 58px;
  left: 14px;
  width: 1px;
}

.fna-panel-caption {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 12px;
  width: 100%;
  margin-top: 16px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.fna-panel-caption span:first-child {
  color: var(--accent-ink);
}

/* --------------------------------------------------------------------------
   2 · Shared heading
   -------------------------------------------------------------------------- */
.fna-head {
  gap: 10px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.fna-head .fna-eyebrow {
  margin-bottom: 0;
}

.fna-h2 {
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.08;
}

/* --------------------------------------------------------------------------
   3 · Envelope rail
   -------------------------------------------------------------------------- */
.fna-icons-section {
  padding-block: clamp(44px, 5.5vw, 72px);
}

.fna-icons {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  list-style: none;
}

.fna-icon-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-top: 16px;
  border-top: 2px solid var(--ink);
}

.fna-icon-glyph {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  color: var(--accent-ink);
  background: rgba(255, 255, 255, 0.66);
}

.fna-icon-body {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.fna-icon-key {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.fna-icon-val {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: clamp(17px, 1.7vw, 22px);
  font-weight: 300;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
}

.fna-icon-note {
  color: var(--text-secondary);
  font-size: 12.5px;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   4 · Port-density chart and table
   -------------------------------------------------------------------------- */
.fna-table-section {
  padding-block: clamp(52px, 6.5vw, 88px);
}

.fna-chart-panel {
  margin-bottom: 26px;
  padding: clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.62);
}

.fna-chart-title {
  margin-bottom: 10px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.fna-chart {
  width: 100%;
  max-width: 720px;
  height: auto;
}

.fna-chart-axis line {
  stroke: var(--line-strong);
  stroke-width: 1;
}

.fna-chart-ticks line {
  stroke: var(--line-strong);
  stroke-width: 1;
}

.fna-chart-grid line {
  stroke: var(--line-soft);
  stroke-width: 1;
}

.fna-chart-bar rect {
  fill: rgba(43, 52, 56, 0.24);
}

.fna-chart-bar rect:nth-child(3) {
  fill: var(--accent);
}

.fna-chart-labels text {
  fill: var(--ink);
  font-family: var(--font-mono);
  font-size: 9px;
}

.fna-table-wrap {
  width: 100%;
  overflow-x: auto;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line-strong);
}

.fna-table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
  font-size: 12.5px;
}

.fna-table caption {
  padding: 12px 14px 12px 0;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-align: left;
  text-transform: uppercase;
}

.fna-table thead th {
  padding: 11px 14px;
  border-bottom: 1px solid var(--line-strong);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-align: left;
  text-transform: uppercase;
  white-space: nowrap;
}

.fna-table tbody th,
.fna-table tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
  text-align: left;
  vertical-align: top;
}

.fna-table tbody th {
  color: var(--ink);
  font-weight: 400;
  white-space: nowrap;
}

.fna-table tbody tr:first-child th,
.fna-table tbody tr:first-child td {
  background: rgba(66, 126, 198, 0.08);
}

.fna-table tbody tr:first-child th {
  box-shadow: inset 3px 0 0 var(--accent);
}

.fna-table a {
  color: var(--accent-ink);
  border-bottom: 1px solid transparent;
}

.fna-table a:hover {
  border-bottom-color: currentColor;
}

.fna-table-note {
  margin-top: 12px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   5 · Model cards — anchor plus four
   -------------------------------------------------------------------------- */
.fna-cards-section {
  padding-block: clamp(52px, 6.5vw, 88px);
}

.fna-anchor {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  margin-bottom: clamp(18px, 2.4vw, 28px);
}

.fna-anchor-media {
  aspect-ratio: 1 / 1;
  height: 100%;
  border-right: 1px solid var(--line-soft);
  border-bottom: 0;
}

.fna-anchor-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.fna-anchor-body {
  gap: 12px;
  padding: clamp(22px, 3vw, 38px);
}

.fna-card-index {
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.fna-anchor-body h3 {
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 300;
}

.fna-anchor-body h3 a:hover,
.fna-card-body h3 a:hover {
  color: var(--accent-ink);
}

.fna-card-copy {
  max-width: 52ch;
  color: var(--text-secondary);
  font-size: 13.5px;
  line-height: 1.6;
}

.fna-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.fna-card-status {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.fna-status-icon {
  color: var(--accent-ink);
}

.fna-card-link {
  align-self: flex-start;
  margin-top: 4px;
}

.fna-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 24px);
}

.fna-card {
  min-width: 0;
}

.fna-card-media {
  aspect-ratio: 1 / 1;
}

.fna-card-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.fna-card-body {
  gap: 10px;
  padding: 20px 22px 22px;
}

.fna-card-body h3 {
  font-size: clamp(19px, 1.6vw, 22px);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   6 · Split — dark inspection bay
   -------------------------------------------------------------------------- */
.fna-split-section {
  padding-block: clamp(56px, 7vw, 96px);
  background:
    radial-gradient(700px 380px at 18% 30%, rgba(66, 126, 198, 0.16), transparent 68%),
    var(--color-graphite-deep);
  color: var(--color-white);
}

.fna-split {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.fna-split-media {
  position: relative;
  margin: 0;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.fna-split-media img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
}

.fna-caption {
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.66);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.fna-split-copy {
  display: grid;
  gap: 16px;
  align-content: start;
}

.fna-split-copy .fna-eyebrow {
  color: #8fe0e7;
  margin-bottom: 0;
}

.fna-split-copy .fna-h2 {
  color: var(--color-white);
}

.fna-split-copy p:not(.fna-eyebrow) {
  max-width: 58ch;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14.5px;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   7 · True-scale diagram
   -------------------------------------------------------------------------- */
.fna-diagram-section {
  padding-block: clamp(52px, 6.5vw, 88px);
}

.fna-diagram {
  margin: 0;
  padding: clamp(18px, 3vw, 34px);
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(
      90deg,
      rgba(43, 52, 56, 0.035) 0,
      rgba(43, 52, 56, 0.035) 1px,
      transparent 1px,
      transparent 36px
    ),
    repeating-linear-gradient(
      180deg,
      rgba(43, 52, 56, 0.035) 0,
      rgba(43, 52, 56, 0.035) 1px,
      transparent 1px,
      transparent 36px
    ),
    rgba(255, 255, 255, 0.58);
  box-shadow: var(--shadow-raised);
}

.fna-scale {
  width: 100%;
  max-width: 780px;
  height: auto;
  margin-inline: auto;
}

.fna-scale-grid line {
  stroke: var(--line);
  stroke-width: 1;
}

.fna-scale-other rect {
  fill: rgba(255, 255, 255, 0.62);
  stroke: var(--line-strong);
  stroke-width: 1;
}

.fna-scale-major rect {
  fill: rgba(66, 126, 198, 0.14);
  stroke: var(--accent-ink);
  stroke-width: 1.5;
}

.fna-scale-dims line {
  stroke: var(--text-secondary);
  stroke-width: 1;
}

.fna-scale-labels text,
.fna-scale-bar text {
  fill: var(--ink);
  font-family: var(--font-mono);
  font-size: 9px;
}

.fna-scale-bar line {
  stroke: var(--ink);
  stroke-width: 1;
}

.fna-diagram .fna-caption {
  max-width: 76ch;
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   8 · Detail gallery
   -------------------------------------------------------------------------- */
.fna-gallery-section {
  padding-block: clamp(52px, 6.5vw, 88px);
}

.fna-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.fna-gallery-item {
  margin: 0;
  min-width: 0;
}

.fna-gallery-frame {
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  padding: 16px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), transparent 70%),
    var(--gradient-ice);
}

.fna-gallery-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 8px 12px rgba(43, 52, 56, 0.12));
}

.fna-gallery-item figcaption {
  margin-top: 8px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   9 · Related envelopes — horizontal rows
   -------------------------------------------------------------------------- */
.fna-related-section {
  padding-block: clamp(44px, 5.5vw, 72px);
  border-top: 1px solid var(--line-soft);
}

.fna-related {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 28px;
}

.fna-related-card {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 16px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  transition:
    border-color var(--dur-base) var(--ease-standard),
    transform var(--dur-base) var(--ease-standard);
}

.fna-related-card:hover {
  border-bottom-color: var(--accent-ink);
  transform: translateX(3px);
}

.fna-related-frame {
  grid-row: span 2;
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  padding: 8px;
  background: var(--gradient-ice);
}

.fna-related-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.fna-related-name {
  align-self: end;
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
}

.fna-related-dim {
  align-self: start;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   10 · FAQ
   -------------------------------------------------------------------------- */
.fna-faq-section {
  padding-block: clamp(52px, 6.5vw, 88px);
}

.fna-faq {
  counter-reset: fna-question;
  max-width: 900px;
  border-top: 2px solid var(--ink);
}

.fna-faq-item {
  border-bottom: 1px solid var(--line-soft);
}

.fna-faq-item summary {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 18px 0;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.35;
  list-style: none;
  cursor: pointer;
}

.fna-faq-item summary::-webkit-details-marker {
  display: none;
}

.fna-faq-item summary::before {
  counter-increment: fna-question;
  content: "0" counter(fna-question);
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.1em;
}

.fna-faq-item summary::after {
  content: "+";
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 300;
}

.fna-faq-item[open] summary::after {
  content: "–";
}

.fna-faq-item p {
  max-width: 78ch;
  padding: 0 0 20px 60px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   11 · CTA band
   -------------------------------------------------------------------------- */
.fna-cta-section {
  padding-block: clamp(44px, 5.5vw, 72px);
}

.fna-cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto minmax(0, 0.7fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(66, 126, 198, 0.12), transparent 46%),
    var(--color-lab-raised);
  box-shadow: var(--shadow-raised);
}

.fna-cta-copy {
  display: grid;
  gap: 8px;
}

.fna-cta-copy .fna-eyebrow {
  margin-bottom: 0;
}

.fna-cta-copy p:not(.fna-eyebrow) {
  color: var(--text-secondary);
  font-size: 14px;
}

.fna-cta-stat {
  display: grid;
  gap: 2px;
  padding-inline: clamp(16px, 2.4vw, 30px);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  text-align: center;
}

.fna-cta-stat strong {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 300;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.fna-cta-stat span {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.fna-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

/* --------------------------------------------------------------------------
   12 · Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  .fna-icons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .fna-hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .fna-hero-panel {
    max-width: 560px;
  }

  .fna-anchor {
    grid-template-columns: 1fr;
  }

  .fna-anchor-media {
    aspect-ratio: 3 / 2;
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .fna-split {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .fna-split-media {
    max-width: 420px;
  }

  .fna-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .fna-cta-inner {
    grid-template-columns: 1fr auto;
  }

  .fna-cta-stat {
    display: none;
  }
}

@media (max-width: 720px) {
  .fna-cards {
    grid-template-columns: 1fr;
  }

  .fna-related {
    grid-template-columns: 1fr;
  }

  .fna-cta-inner {
    grid-template-columns: 1fr;
  }

  .fna-cta-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .fna-icons {
    grid-template-columns: 1fr;
  }

  .fna-hero-title {
    font-size: clamp(38px, 11vw, 52px);
  }

  .fna-gallery {
    grid-template-columns: 1fr;
  }

  .fna-faq-item summary {
    grid-template-columns: 32px minmax(0, 1fr) auto;
    gap: 10px;
  }

  .fna-faq-item p {
    padding-left: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fna-related-card {
    transition: none;
  }
}