/* ==========================================================================
   UPGRADE PROGRAM PAGE — v2
   Dark-dominant. Big type. Cinematic. Tech-page diagram brought forward.
   Uses site tokens from base.css.
   ========================================================================== */

/* Header: non-fixed on this page — it has too many dark/light section swaps
   for a fixed transparent header to look right. Sits at top, scrolls away. */
.site-header {
  position: absolute;
}

/* --------- HERO (full-bleed image + heavy scrim) --------- */
.up-hero {
  position: relative;
  min-height: 82vh;
  padding: clamp(7rem, 14vh, 11rem) var(--gutter) clamp(4rem, 10vh, 7rem);
  background: var(--ink);
  color: var(--bone);
  overflow: hidden;
  display: flex;
  align-items: center;
}
.up-hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.up-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: grayscale(0.35) contrast(1.05) brightness(0.75);
}
.up-hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11,11,12,0.55) 0%, rgba(11,11,12,0.35) 40%, rgba(11,11,12,0.85) 100%),
    linear-gradient(90deg, rgba(11,11,12,0.9) 0%, rgba(11,11,12,0.4) 50%, rgba(11,11,12,0.55) 100%),
    radial-gradient(1000px 500px at 25% 40%, rgba(49,73,94,0.25), transparent 70%);
}
.up-hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
}
.up-hero-crumbs {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(239,236,228,0.55);
  margin-bottom: 3rem;
}
.up-hero-crumbs a {
  color: rgba(239,236,228,0.55);
  text-decoration: none;
  transition: color var(--dur-1) var(--ease-out);
}
.up-hero-crumbs a:hover { color: var(--bone); }
.up-hero-crumbs .sep { margin: 0 0.6rem; color: rgba(239,236,228,0.3); }

.up-hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  background: color-mix(in oklab, var(--accent) 15%, transparent);
  border: 1px solid color-mix(in oklab, var(--accent) 50%, transparent);
  padding: 0.5rem 1rem;
  border-radius: 2px;
  margin-bottom: 2rem;
}

.up-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 6.5vw, 5.5rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.03em;
  margin: 0 0 2rem;
  color: var(--bone);
  max-width: 18ch;
}
.up-hero-tagline {
  font-family: var(--font-body);
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  line-height: 1.55;
  color: rgba(239,236,228,0.85);
  max-width: 58ch;
  margin: 0;
}
.up-hero-scroll {
  position: absolute;
  bottom: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  color: rgba(239,236,228,0.55);
}
.up-hero-scroll-line {
  width: 1px;
  height: 42px;
  background: linear-gradient(180deg, transparent 0%, rgba(239,236,228,0.6) 100%);
}
.up-hero-scroll-label {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.25em;
  text-transform: uppercase;
}
@media (max-width: 900px) {
  .up-hero-scroll { display: none; }
}

/* --------- ECONOMICS STRIP (dark, big numerals) --------- */
.up-econ {
  background: var(--ink);
  color: var(--bone);
  padding: clamp(5rem, 10vh, 8rem) var(--gutter);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  position: relative;
}
.up-econ::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(1200px 400px at 50% 0%, rgba(49,73,94,0.22), transparent 70%);
  pointer-events: none;
}
.up-econ-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.up-econ-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 3rem;
  text-align: center;
}
.up-econ-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.up-econ-item {
  padding: 3rem 2.5rem;
  border-right: 1px solid var(--line-dark);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.up-econ-item:last-child { border-right: none; }
.up-econ-num {
  font-family: var(--font-display);
  font-size: clamp(3rem, 5.8vw, 5rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--bone);
  white-space: nowrap;
}
.up-econ-unit {
  font-size: 0.4em;
  font-weight: 500;
  color: rgba(239,236,228,0.55);
  margin-left: 0.15em;
  letter-spacing: 0;
}
.up-econ-label {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.up-econ-note {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: rgba(239,236,228,0.7);
  margin-top: 0.35rem;
}
.up-econ-lede {
  max-width: 68ch;
  margin: 3.5rem auto 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.15rem, 1.6vw, 1.5rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-align: center;
  color: rgba(239,236,228,0.85);
}
.up-econ-lede span {
  color: var(--bone);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
}

@media (max-width: 900px) {
  .up-econ-grid { grid-template-columns: 1fr; }
  .up-econ-item {
    border-right: none;
    border-bottom: 1px solid var(--line-dark);
    padding: 2.5rem 1.5rem;
  }
  .up-econ-item:last-child { border-bottom: none; }
}

/* --------- SECTION SHELL --------- */
.up-section-head {
  max-width: 780px;
  margin: 0 auto 3.5rem;
  text-align: center;
}
.up-section-head--inv { color: var(--bone); }
.up-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}
.up-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.up-h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  color: var(--ink);
}
.up-h2--inv { color: var(--bone); }
.up-lead {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--text-dim);
  margin: 0;
}
.up-lead--inv { color: rgba(239,236,228,0.8); }

/* --------- ANATOMY SECTION (dark) --------- */
.up-anatomy-section {
  background: var(--ink);
  color: var(--bone);
  padding: clamp(5rem, 10vh, 8rem) var(--gutter);
  position: relative;
}
.up-diagram {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: clamp(2rem, 4vw, 3.5rem);
  background: rgba(239,236,228,0.03);
  border: 1px solid rgba(239,236,228,0.12);
  border-radius: var(--radius);
  max-width: 1100px;
  margin: 0 auto;
}
.up-diagram-part {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 4vw, 3rem);
  align-items: center;
}
.up-diagram-tag {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.85rem;
}
.up-diagram-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 2vw, 1.75rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--bone);
  margin: 0 0 1rem 0;
  text-transform: uppercase;
}
.up-diagram-label p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: rgba(239,236,228,0.75);
  margin: 0 0 1.25rem 0;
  max-width: 42ch;
}
.up-diagram-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid rgba(239,236,228,0.14);
  padding-top: 1rem;
}
.up-diagram-list li {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(239,236,228,0.85);
  padding: 0.4rem 0 0.4rem 1.25rem;
  position: relative;
  line-height: 1.5;
}
.up-diagram-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
}
.up-diagram-visual {
  color: var(--bone);
  padding: 1rem;
  border: 1px solid rgba(239,236,228,0.08);
  border-radius: 4px;
  background: rgba(0,0,0,0.15);
}
.up-diagram-visual--accent { color: var(--accent); }
.up-diagram-visual svg { width: 100%; height: auto; display: block; }
.up-diagram-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(239,236,228,0.6);
}
.up-diagram-connector-label {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.up-diagram-connector svg {
  color: var(--accent);
  width: 60px;
  height: 30px;
}

@media (max-width: 900px) {
  .up-diagram-part { grid-template-columns: 1fr; }
}

/* --------- PULL QUOTE --------- */
.up-pull {
  background: var(--bone);
  color: var(--ink);
  padding: clamp(5rem, 10vh, 8rem) var(--gutter);
  position: relative;
}
.up-pull-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}
.up-pull-mark {
  font-family: var(--font-display);
  font-size: clamp(5rem, 10vw, 9rem);
  color: var(--accent);
  line-height: 0.6;
  margin-bottom: 1rem;
  opacity: 0.7;
}
.up-pull-quote {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 2rem 0;
}
.up-pull-quote em {
  font-style: italic;
  color: var(--text-dim);
  font-weight: 400;
}
.up-pull-attr {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* --------- HOW IT WORKS --------- */
.up-how {
  background: var(--paper);
  color: var(--ink);
  padding: clamp(5rem, 10vh, 8rem) var(--gutter);
}
.up-steps {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 1000px;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.up-step {
  display: grid;
  grid-template-columns: minmax(0, 140px) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  background: var(--bone);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2.5rem;
  transition: border-color var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-out);
}
.up-step:hover {
  border-color: color-mix(in oklab, var(--accent) 55%, var(--line));
  transform: translateY(-2px);
}
.up-step-number {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.03em;
  color: var(--accent);
}
.up-step-tag {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}
.up-step-title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2vw, 1.65rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 0.75rem;
}
.up-step-body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-dim);
  margin: 0;
}
.up-step-body a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
  transition: color var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);
}
.up-step-body a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

@media (max-width: 780px) {
  .up-step {
    grid-template-columns: 1fr;
    padding: 2rem;
  }
  .up-step-number { font-size: 3rem; }
}

/* --------- FLEET (image bg dark section) --------- */
.up-fleet-section {
  position: relative;
  padding: clamp(6rem, 12vh, 9rem) var(--gutter);
  background: var(--ink);
  color: var(--bone);
  overflow: hidden;
}
.up-fleet-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.up-fleet-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 60% 35%;
  filter: grayscale(0.35) contrast(1.05) brightness(0.85);
}
.up-fleet-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11,11,12,0.5) 0%, rgba(11,11,12,0.4) 100%),
    linear-gradient(90deg, rgba(11,11,12,0.85) 0%, rgba(11,11,12,0.25) 100%);
}
.up-fleet-section .up-inner {
  position: relative;
  z-index: 1;
}
.up-fleet {
  max-width: 820px;
}
.up-fleet-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.up-fleet-body {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: 1.6;
  color: rgba(239,236,228,0.85);
  margin: 1.5rem 0 2.5rem;
}
.up-fleet-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.up-fleet-cta .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.35rem;
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}
.up-fleet-cta .btn--accent {
  background: var(--accent);
  color: var(--bone);
  border: 1px solid var(--accent);
}
.up-fleet-cta .btn--accent:hover {
  background: var(--accent-hot);
  border-color: var(--accent-hot);
}
.up-fleet-cta .btn--inv {
  background: transparent;
  color: var(--bone);
  border: 1px solid rgba(239,236,228,0.35);
}
.up-fleet-cta .btn--inv:hover {
  background: rgba(239,236,228,0.08);
  border-color: var(--bone);
}
.up-fleet-cta .btn .arrow { transition: transform var(--dur-1) var(--ease-out); }
.up-fleet-cta .btn:hover .arrow { transform: translateX(4px); }

/* --------- COMPLIANCE --------- */
.up-compliance-section {
  background: var(--bone);
  padding: clamp(3rem, 6vh, 5rem) var(--gutter);
}
.up-compliance {
  max-width: 900px;
  margin: 0 auto;
  background: var(--paper);
  border-left: 3px solid var(--accent);
  padding: 2rem 2.25rem;
  border-radius: var(--radius);
}
.up-compliance-tag {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.85rem;
}
.up-compliance-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 0.85rem;
}
.up-compliance-body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-dim);
  margin: 0;
}

/* --------- CROSS-LINKS --------- */
.up-cross-section {
  background: var(--bone);
  padding: clamp(3rem, 6vh, 5rem) var(--gutter) clamp(5rem, 10vh, 7rem);
}
.up-crosslinks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.up-cross {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 1.75rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-out);
}
.up-cross:hover {
  border-color: color-mix(in oklab, var(--accent) 60%, var(--line));
  transform: translateY(-2px);
}
.up-cross-tag {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  min-width: 8.5rem;
}
.up-cross-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--ink);
  flex: 1;
  letter-spacing: -0.005em;
}
.up-cross-arrow {
  font-family: var(--font-mono);
  color: var(--accent);
  transition: transform var(--dur-1) var(--ease-out);
}
.up-cross:hover .up-cross-arrow { transform: translateX(4px); }

/* --------- REVEAL --------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --------- RESPONSIVE --------- */
@media (max-width: 640px) {
  .up-hero { min-height: 70vh; padding-top: 6.5rem; }
  .up-econ-item { padding: 2rem 1.5rem; }
  .up-fleet-cta { flex-direction: column; align-items: stretch; }
  .up-fleet-cta .btn { justify-content: space-between; }
  .up-cross { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  .up-cross-tag { min-width: 0; }
  .up-compliance { padding: 1.5rem 1.5rem; }
  .up-diagram { padding: 1.5rem; }
  .up-diagram-visual { padding: 0.75rem; }
}

/* =========================================================================
   EXPLODED ANATOMY  (§ 01 · The architecture)
   Real product photo split into body + core with mechanical-lock connector
   ========================================================================= */

.up-exploded {
  background: var(--ink);
  color: var(--bone);
  padding: 7rem 0 8rem;
  position: relative;
  overflow: hidden;
}

/* subtle grid backdrop */
.up-exploded::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
  opacity: 0.6;
}

.up-exploded-inner {
  position: relative;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--gutter, 2rem);
}

.up-exploded-head {
  text-align: center;
  margin-bottom: 5rem;
}

.up-exploded-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.up-exploded-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--bone);
  margin: 0;
}

.up-exploded-stage {
  position: relative;
}

/* --------- top labels row --------- */
.up-exploded-labels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  margin-bottom: 2rem;
  align-items: end;
}

.up-exploded-label {
  position: relative;
  padding-bottom: 1.5rem;
}

.up-exploded-label--body { text-align: right; padding-right: 2rem; }
.up-exploded-label--core { text-align: left; padding-left: 2rem; }

/* connecting drop-lines from label to suppressor */
.up-exploded-label::after {
  content: "";
  position: absolute;
  bottom: -2rem;
  width: 1px;
  height: 2rem;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.4), transparent);
}
.up-exploded-label--body::after { right: 20%; }
.up-exploded-label--core::after { left: 20%; }

.up-exploded-tag {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.up-exploded-headline {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--bone);
  margin-bottom: 0.5rem;
  line-height: 1.1;
}

.up-exploded-sub {
  font-size: 0.95rem;
  line-height: 1.5;
  color: rgba(240, 236, 226, 0.6);
  max-width: 32ch;
}
.up-exploded-label--body .up-exploded-sub { margin-left: auto; }
.up-exploded-label--core .up-exploded-sub { margin-right: auto; }

/* --------- the exploded suppressor ---------
   Source image: 1800×423 (aspect ratio 4.255). Body/mount region ends at ~27%.
   Approach: a single reference row height. Body container is 27% wide, gap 8%,
   core 65%. Each container has overflow:hidden. Each contains the FULL image
   scaled to a container-query-friendly total width (via CSS var). */
.up-exploded-suppressor {
  position: relative;
  display: grid;
  grid-template-columns: 27fr 8fr 65fr;
  align-items: center;
  margin: 0 auto;
  max-width: 1100px;
  padding: 3rem 0;
  container-type: inline-size;
}

/* Fixed row height, image scales to 100cqw (100% of the suppressor container width) */
.up-exploded-half {
  position: relative;
  overflow: hidden;
  height: clamp(140px, 21cqw, 230px);
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.6));
}

.up-exploded-half img {
  display: block;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100cqw;
  height: auto;
  max-width: none;
}

/* Body container is 27cqw wide. Image left edge sits at container left edge —
   shows the leftmost 27% of the suppressor (the mount cap + engraving). */
.up-exploded-half--body img {
  left: 0;
}

/* Core container starts at 35cqw of the row (after body 27 + gap 8).
   Position image so its 35% point sits at the container's left edge. */
.up-exploded-half--core img {
  left: -35cqw;
}

/* --------- gap with mechanical lock --------- */
.up-exploded-gap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(240, 236, 226, 0.7);
  padding: 0 1rem;
  min-height: clamp(120px, 14vw, 200px);
}

.up-exploded-connector {
  width: 100%;
  max-width: 200px;
  height: auto;
  display: block;
}

.up-exploded-gap-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 0.75rem;
  white-space: nowrap;
}

/* --------- bottom callouts --------- */
.up-exploded-callouts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  margin-top: 2rem;
  align-items: start;
}

.up-exploded-callout {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  position: relative;
  padding-top: 2rem;
}

.up-exploded-callout--body { padding-right: 2rem; }
.up-exploded-callout--core { padding-left: 2rem; }

/* upward drop-line from suppressor to callout */
.up-exploded-callout::before {
  content: "";
  position: absolute;
  top: 0;
  width: 1px;
  height: 2rem;
  background: linear-gradient(to top, rgba(255, 255, 255, 0.4), transparent);
}
.up-exploded-callout--body::before { right: 20%; }
.up-exploded-callout--core::before { left: 20%; }

.up-exploded-callout--body { justify-self: end; text-align: right; flex-direction: row-reverse; }
.up-exploded-callout--core { justify-self: start; }

.up-exploded-callout-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}

.up-exploded-callout-text {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-width: 34ch;
}

.up-exploded-callout-text strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--bone);
  letter-spacing: 0;
}

.up-exploded-callout-text span {
  font-size: 0.9rem;
  line-height: 1.5;
  color: rgba(240, 236, 226, 0.55);
}

/* --------- footer link --------- */
.up-exploded-footer {
  display: flex;
  justify-content: center;
  margin-top: 5rem;
}

.up-exploded-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(240, 236, 226, 0.7);
  text-decoration: none;
  padding: 0.85rem 1.25rem;
  border: 1px solid rgba(240, 236, 226, 0.2);
  border-radius: var(--radius);
  transition: color var(--dur-1) var(--ease-out),
    border-color var(--dur-1) var(--ease-out),
    background var(--dur-1) var(--ease-out);
}

.up-exploded-link:hover {
  color: var(--ink);
  background: var(--accent);
  border-color: var(--accent);
}

.up-exploded-link:hover span {
  transform: translateX(4px);
  transition: transform var(--dur-1) var(--ease-out);
}

/* --------- responsive: stack vertically on mobile --------- */
@media (max-width: 900px) {
  .up-exploded { padding: 5rem 0 5.5rem; }
  .up-exploded-head { margin-bottom: 3rem; }

  .up-exploded-labels,
  .up-exploded-callouts {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .up-exploded-label,
  .up-exploded-callout {
    text-align: left !important;
    padding: 0 !important;
    justify-self: stretch !important;
    margin-bottom: 1.5rem;
  }
  .up-exploded-label--body .up-exploded-sub,
  .up-exploded-label--core .up-exploded-sub { margin: 0; }

  .up-exploded-callout { flex-direction: row !important; }
  .up-exploded-callout::before,
  .up-exploded-label::after { display: none; }

  /* mobile suppressor: stack body → lock → core vertically.
     Each half shows its slice of the full image, sized to viewport width. */
  .up-exploded-suppressor {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    gap: 0.5rem;
    padding: 2rem 0;
    container-type: normal;
  }

  .up-exploded-half {
    height: auto;
    aspect-ratio: 1800 / 423;
    width: 90%;
    max-width: 420px;
    margin: 0 auto;
    filter: drop-shadow(0 16px 30px rgba(0, 0, 0, 0.55));
    /* body: only show left 27% by narrowing container width to 27% of image */
  }

  .up-exploded-half--body {
    width: min(24.3vw, 113px);   /* 27% of 90vw, capped at 27% of 420px */
    aspect-ratio: 486 / 423;
    justify-self: center;
  }

  .up-exploded-half--core {
    width: min(58.5vw, 273px);   /* 65% of 90vw, capped at 65% of 420px */
    aspect-ratio: 1170 / 423;
    justify-self: center;
  }

  .up-exploded-half img {
    position: absolute;
    top: 0;
    height: 100%;
    width: auto;
    max-width: none;
    transform: none;
  }

  .up-exploded-half--body img { left: 0; }
  .up-exploded-half--core img {
    /* image is 1800px wide at scale; core container is 65% => scale image to core_container_width / 0.65 */
    height: 100%;
    left: calc(-100% * 27 / 65);
  }

  .up-exploded-gap {
    min-height: auto;
    padding: 0.5rem 0;
    flex-direction: row;
    gap: 1rem;
    justify-content: center;
  }
  .up-exploded-connector { max-width: 120px; }
  .up-exploded-gap-label { margin-top: 0; }

  .up-exploded-footer { margin-top: 3rem; }
}