/* platform.css — LiquiFire OS Platform page */

/* ═══════════════════════════════════════════════
   REVEAL ANIMATIONS
   ═══════════════════════════════════════════════ */
.rv { opacity: 0; transform: translateY(16px); transition: opacity .5s, transform .5s; }
.rv.v { opacity: 1; transform: none; }
.rv.d1 { transition-delay: .1s; }
.rv.d2 { transition-delay: .2s; }
.rv.d3 { transition-delay: .3s; }

/* ═══════════════════════════════════════════════
   PAGE HERO — Tier 1 (typographic only)
   ═══════════════════════════════════════════════ */
.page-hero {
  padding: calc(136px + env(safe-area-inset-top, 0px)) 0 80px;
  background: var(--white);
  border-bottom: 1px solid var(--warm-200);
  position: relative;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--warm-100) 1px, transparent 1px),
    linear-gradient(90deg, var(--warm-100) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .45;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 70%);
  pointer-events: none;
}
.page-hero .wrap { position: relative; z-index: 1; }
.page-hero .section-tag { color: var(--amber); }
.page-hero h1 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.08;
  color: var(--ink-900);
  max-width: 720px;
  margin: 12px 0 20px;
  letter-spacing: -.02em;
}
.page-hero-sub {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--ink-600);
  max-width: 560px;
}

/* ── Hero stats ── */
.plat-hero-stats {
  display: flex; gap: 0; flex-wrap: wrap;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 2px solid var(--warm-200);
}
.plat-stat {
  padding: 0 40px 0 0;
  margin-right: 40px;
  border-right: 1px solid var(--warm-200);
  flex-shrink: 0;
}
.plat-stat:last-child {
  border-right: none;
  padding-right: 0;
  margin-right: 0;
}
.plat-stat-num {
  display: block;
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(36px, 4vw, 52px);
  line-height: 1;
  color: var(--ink-900);
  letter-spacing: -.03em;
}
.plat-stat-label {
  display: block;
  font-family: var(--f-mono);
  font-size: 9px; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-400);
  margin-top: 8px;
}

/* ═══════════════════════════════════════════════
   SHARED TOKENS
   ═══════════════════════════════════════════════ */
.section-tag {
  font-family: var(--f-mono);
  font-size: 9px; font-weight: 500;
  letter-spacing: .13em; text-transform: uppercase;
  color: var(--amber);
  display: block; margin-bottom: 10px;
}
.section-header { margin-bottom: 52px; }
.section-header h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.1; letter-spacing: -.02em;
  color: var(--ink-900); margin-bottom: 14px;
}
.section-header p {
  font-size: 14px; font-weight: 300;
  line-height: 1.6; color: var(--ink-500);
  max-width: 520px;
}

/* Tag row */
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-family: var(--f-mono); font-size: 10px;
  padding: 4px 10px; border-radius: var(--r-sm);
  border: 1px solid var(--warm-200); color: var(--ink-500);
  background: var(--white); letter-spacing: .04em;
}

/* Inline code */
.inline-code {
  font-family: var(--f-mono); font-size: 11px; font-weight: 500;
  color: var(--amber);
  background: var(--amber-soft);
  padding: 1px 6px; border-radius: 3px;
  letter-spacing: .02em;
}

/* ═══════════════════════════════════════════════
   HOW IT WORKS — diagram section
   ═══════════════════════════════════════════════ */
.plat-how-section {
  padding: 104px 0;
  background: var(--warm-50);
  border-bottom: 1px solid var(--warm-200);
}
.plat-diagram-wrap {
  background: var(--white);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  padding: 0;
}
.plat-diagram-wrap canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--r-xl);
}

/* ═══════════════════════════════════════════════
   CHAIN LANGUAGE SECTION
   ═══════════════════════════════════════════════ */
.plat-chain-section {
  padding: 104px 0;
  background: var(--navy);
  border-bottom: none;--amber:#f59e0b;}
.chain-split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: start;
}

/* Code card */
.code-card {
  background: var(--white);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.code-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--warm-200);
  background: var(--warm-50);
}
.code-header span {
  font-family: var(--f-mono); font-size: 10px;
  color: var(--ink-400); letter-spacing: .03em;
}
.code-live {
  color: var(--green) !important;
  font-size: 9px !important; letter-spacing: .06em !important;
}
.code-body {
  padding: 22px 20px;
  font-family: var(--f-mono); font-size: 11.5px;
  line-height: 2; color: var(--ink-600);
}
.fn  { color: var(--amber); font-weight: 500; }
.str { color: var(--green); }
.cm  { color: var(--warm-400); font-style: italic; }
.vr  { color: var(--violet); }

/* Chain URL strip */
.chain-url-strip {
  margin-top: 12px;
  padding: 12px 16px;
  background: var(--navy);
  border-radius: var(--r-md);
  display: flex; align-items: baseline; gap: 12px;
  overflow: hidden;--amber:#f59e0b;}
.chain-url-label {
  font-family: var(--f-mono); font-size: 8px; font-weight: 600;
  letter-spacing: .12em; color: rgba(255,255,255,.4);
  white-space: nowrap; flex-shrink: 0;
}
.chain-url-value {
  font-family: var(--f-mono); font-size: 10px;
  color: var(--amber); word-break: break-all; line-height: 1.6;
}

/* Chain property items */
.chain-props-col { display: flex; flex-direction: column; gap: 32px; }
.chain-prop {
  display: flex; gap: 20px; align-items: flex-start;
}
.chain-prop-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--warm-50);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-md);
  color: var(--ink-700);
}
.chain-prop-icon svg { width: 18px; height: 18px; }
.chain-prop h3 {
  font-family: var(--f-serif); font-size: 19px;
  font-weight: 400;
  color: var(--ink-900); line-height: 1.2;
  margin-bottom: 8px; letter-spacing: -.01em;
}
.chain-prop p {
  font-size: 14px; font-weight: 300;
  line-height: 1.6; color: var(--ink-600);
}

/* ═══════════════════════════════════════════════
   ARCHITECTURE SECTION
   ═══════════════════════════════════════════════ */
.plat-arch-section {
  padding: 104px 0;
  background: var(--warm-50);
  border-bottom: 1px solid var(--warm-200);
}
/* ── Architecture lead card ── */
.arch-lead {
  background: var(--navy);
  border-radius: var(--r-lg);
  border: none;
  overflow: hidden;
  margin-bottom: 14px;--amber:#f59e0b;}
.arch-lead-illus { display: none; }
.arch-lead-text {
  padding: 52px 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 0 64px;
  align-items: start;
}
.arch-lead-tag {
  grid-column: 1 / -1;
  display: block;
  font-family: var(--f-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 20px;
}
.arch-lead-text h3 {
  grid-column: 1 / 2;
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(26px, 2.6vw, 38px);
  line-height: 1.1;
  color: var(--white);
  letter-spacing: -.02em;
  margin: 0;
}
.arch-lead-text p {
  grid-column: 2 / 3;
  font-size: 14.5px;
  font-weight: 300;
  line-height: 1.75;
  color: rgba(255,255,255,.78);
  max-width: none;
  margin: 0;
}
.arch-lead-text--full {
  /* modifier retained for specificity, layout handled above */
}

/* ── Architecture supporting 5-card grid ── */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.arch-card {
  background: var(--white);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: box-shadow .3s, transform .2s, border-color .2s;
  display: flex; flex-direction: column;
}
.arch-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
  border-color: var(--warm-300);
}
.arch-illus {
  background: var(--warm-50);
  border-bottom: 1px solid var(--warm-200);
  line-height: 0;
}
.arch-illus img { width: 100%; height: auto; display: block; }
.arch-card-text { padding: 20px 22px 24px; }
.arch-card-text h4 {
  font-family: var(--f-serif); font-size: 19px;
  font-weight: 400;
  line-height: 1.2; color: var(--ink-900);
  letter-spacing: -.01em; margin-bottom: 10px;
}
.arch-card-text p {
  font-size: 13.5px; font-weight: 300;
  line-height: 1.6; color: var(--ink-600);
}

/* ═══════════════════════════════════════════════
   IMAGE CAPABILITIES SECTION
   ═══════════════════════════════════════════════ */
.plat-caps-section {
  padding: 104px 0;
  background: var(--white);
  border-bottom: 1px solid var(--warm-200);
}
.caps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.cap-group {
  padding: 28px 24px 24px;
  background: var(--white);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  transition: border-color .2s, box-shadow .2s;
  display: flex;
  flex-direction: column;
}
.cap-group:hover {
  border-color: var(--warm-300);
  box-shadow: var(--shadow-sm);
}
.cap-group-label {
  font-family: var(--f-mono); font-size: 9px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--amber); display: block; margin-bottom: 12px;
}
.cap-group h3 {
  font-family: var(--f-serif); font-size: 19px;
  font-weight: 400;
  line-height: 1.2; color: var(--ink-900);
  letter-spacing: -.01em; margin-bottom: 10px;
}
.cap-group p {
  font-size: 13.5px; font-weight: 300;
  line-height: 1.6; color: var(--ink-600);
}

/* ═══════════════════════════════════════════════
   TOOL SUITE SECTION
   ═══════════════════════════════════════════════ */
.plat-tools-section {
  padding: 104px 0;
  background: var(--warm-50);
  border-bottom: 1px solid var(--warm-200);
}
.tools-tabs {
  display: flex;
  gap: 0;
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  background: var(--warm-50);
  padding: 4px;
  margin-bottom: 32px;
  width: 100%;
}
.tools-tab-btn {
  font-family: var(--f-sans);
  font-size: 13px; font-weight: 500;
  color: var(--ink-500);
  padding: 9px 0;
  flex: 1;
  text-align: center;
  border-radius: calc(var(--r-lg) - 4px);
  border: none;
  background: transparent;
  cursor: pointer;
  transition: background .15s, color .15s, box-shadow .15s;
  white-space: nowrap;
}
.tools-tab-btn:hover { color: var(--ink-900); }
.tools-tab-btn.on {
  background: var(--white);
  color: var(--ink-900);
  box-shadow: var(--shadow-xs);
}
.tools-panel { display: none; }
.tools-panel.on { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
.tools-panel-viewer {
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--warm-200);
  box-shadow: var(--shadow-lg);
  background: var(--white);
  aspect-ratio: 4 / 3;
}
.tools-panel-viewer iframe {
  width: 100%; height: 100%; border: none; display: block;
}

/* ── Placeholder panels (until real screenshots/demos are ready) ── */
.tools-panel-viewer--placeholder {
  background: var(--warm-50);
  border: 1.5px dashed var(--warm-300);
  display: flex;
  align-items: center;
  justify-content: center;
}
.tools-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--ink-400);
  text-align: center;
  padding: 20px;
}
.tools-placeholder svg { opacity: .4; }
.tools-placeholder span {
  font-family: var(--f-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-400);
}

.tools-panel-viewer--text {
  background: var(--warm-50);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-xl);
  padding: 40px 36px;
  display: flex; flex-direction: column; justify-content: center;
}
.tools-panel-info { padding: 8px 0; }
.tools-panel-tag {
  font-family: var(--f-mono); font-size: 9px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--amber); display: block; margin-bottom: 14px;
}
.tools-panel-info h3 {
  font-family: var(--f-serif); font-size: clamp(24px, 2.6vw, 36px);
  font-weight: 400;
  line-height: 1.1; color: var(--ink-900);
  letter-spacing: -.02em; margin-bottom: 16px;
}
.tools-panel-info p {
  font-size: 14px; font-weight: 300;
  line-height: 1.65; color: var(--ink-600);
  margin-bottom: 12px;
}
.tools-panel-list {
  list-style: none; padding: 0; margin: 20px 0 0;
  border-top: 1px solid var(--warm-200);
  padding-top: 18px;
  display: flex; flex-direction: column; gap: 8px;
}
.tools-panel-list li {
  font-size: 13px; font-weight: 300;
  color: var(--ink-600); line-height: 1.5;
  padding-left: 18px; position: relative;
}
.tools-panel-list li::before {
  content: '';
  position: absolute; left: 0; top: 8px;
  width: 6px; height: 6px;
  border-radius: 50%; background: var(--amber);
}
/* Responsive */
@media (max-width: 1024px) {
  .tools-panel.on { grid-template-columns: 1fr; gap: 28px; }
  .tools-panel-viewer { aspect-ratio: 16/9; max-width: 640px; }
}
@media (max-width: 768px) {
  .tools-tabs { overflow-x: auto; border-radius: var(--r-md); }
  .tools-tab-btn { flex: 0 0 auto; padding: 9px 14px; font-size: 12px; }
}
.tool-card {
  padding: 28px 26px 30px;
  background: var(--white);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-xs);
  display: flex; flex-direction: column;
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.tool-card:hover {
  border-color: var(--warm-300);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.tool-tag {
  font-family: var(--f-mono); font-size: 9px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--amber); display: block; margin-bottom: 12px;
}
.tool-card h3 {
  font-family: var(--f-serif); font-size: 20px;
  font-weight: 400;
  line-height: 1.2; color: var(--ink-900);
  letter-spacing: -.01em; margin-bottom: 12px;
}
.tool-card p {
  font-size: 13.5px; font-weight: 300;
  line-height: 1.6; color: var(--ink-600);
}

/* ═══════════════════════════════════════════════
   AI PACKS SECTION
   ═══════════════════════════════════════════════ */
.plat-ai-section {
  padding: 104px 0;
  background: var(--white);
  border-bottom: 1px solid var(--warm-200);
}
.plat-ai-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}
.plat-ai-text h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.1; letter-spacing: -.02em;
  color: var(--ink-900); margin: 10px 0 16px;
}
.plat-ai-text p {
  font-size: 14px; font-weight: 300;
  line-height: 1.6; color: var(--ink-600);
  max-width: 480px; margin-bottom: 14px;
}

/* Pipeline card */
.pipeline-card {
  background: var(--white);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.pipe-step {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--warm-100);
  background: var(--warm-50);
}
.pipe-n {
  width: 24px; height: 24px; border-radius: 5px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--f-mono); font-size: 9px; font-weight: 600;
  flex-shrink: 0; margin-top: 1px;
}
.pipe-text strong {
  display: block; font-size: 11.5px; font-weight: 500;
  color: var(--ink-800); font-family: var(--f-mono);
  line-height: 1.4; margin-bottom: 2px;
}
.pipe-text span {
  font-size: 11px; font-weight: 300; color: var(--ink-400);
}
.pipe-connector {
  height: 6px; width: 1.5px;
  background: var(--warm-200);
  margin: 0 0 0 22px;
  position: relative; overflow: hidden;
}
.pipe-connector::after {
  content: '';
  position: absolute; width: 100%; height: 6px;
  background: var(--blue-mid);
  animation: aflow 2.2s ease-in-out infinite;
  border-radius: 1px;
}
@keyframes aflow { 0%{top:-6px;opacity:0} 40%{opacity:1} 100%{top:6px;opacity:0} }

.plat-pipe-note {
  margin-top: 14px;
  font-size: 11.5px; font-weight: 300;
  color: var(--ink-400);
  font-family: var(--f-mono);
  letter-spacing: .02em;
  text-align: center;
}

/* ═══════════════════════════════════════════════
   DEPLOYMENT SECTION
   ═══════════════════════════════════════════════ */
.plat-deploy-section {
  padding: 104px 0;
  background: var(--white);
  border-bottom: 1px solid var(--warm-200);
}
.deploy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: stretch;
}

.deploy-card {
  padding: 28px 28px 32px;
  background: var(--white);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  transition: border-color .2s, box-shadow .2s;
  display: flex;
  flex-direction: column;
}
.deploy-card:hover {
  border-color: var(--warm-300);
  box-shadow: var(--shadow-sm);
}
.deploy-card-tag {
  font-family: var(--f-mono); font-size: 9px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--amber); display: block; margin-bottom: 12px;
}
.deploy-card h3 {
  font-family: var(--f-serif); font-size: 20px;
  font-weight: 400;
  line-height: 1.2; color: var(--ink-900);
  letter-spacing: -.01em; margin-bottom: 10px;
}
.deploy-card p {
  font-size: 14px; font-weight: 300;
  line-height: 1.6; color: var(--ink-600);
  margin-bottom: 16px;
}
.deploy-list {
  list-style: none; padding: 0; margin: 0;
  border-top: 1px solid var(--warm-200);
  padding-top: 14px;
}
.deploy-list li {
  font-size: 13px; font-weight: 300;
  color: var(--ink-600); line-height: 1.5;
  padding: 4px 0 4px 16px;
  position: relative;
}
.deploy-list li::before {
  content: '';
  position: absolute; left: 0; top: 10px;
  width: 5px; height: 5px;
  border-radius: 50%; background: var(--warm-300);
}

/* ═══════════════════════════════════════════════
   INTEGRATION SECTION
   ═══════════════════════════════════════════════ */
.plat-integration-section {
  padding: 104px 0;
  background: var(--warm-50);
  border-bottom: 1px solid var(--warm-200);
}
.plat-int-inner {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 80px;
  align-items: start;
}
.plat-int-text h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(26px, 2.8vw, 38px);
  line-height: 1.1; letter-spacing: -.02em;
  color: var(--ink-900); margin: 10px 0 16px;
}
.plat-int-text p {
  font-size: 14px; font-weight: 300;
  line-height: 1.6; color: var(--ink-600);
  max-width: 480px; margin-bottom: 14px;
}
.plat-int-partners { margin-top: 32px; }
.int-partner-grid {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.int-partner {
  font-family: var(--f-mono); font-size: 10px; font-weight: 500;
  letter-spacing: .04em;
  padding: 6px 12px;
  background: var(--white);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-sm);
  color: var(--ink-600);
  transition: border-color .2s;
}
.int-partner:hover { border-color: var(--warm-300); }

/* Stat column */
.plat-int-stat-col {
  display: flex; flex-direction: column; gap: 0;
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  background: var(--white);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.plat-int-stat {
  padding: 28px 28px 26px;
  border-bottom: 1px solid var(--warm-200);
}
.plat-int-stat:last-child { border-bottom: none; }
.plat-int-stat-num {
  display: block;
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(32px, 3.5vw, 48px);
  line-height: 1;
  color: var(--ink-900);
  letter-spacing: -.02em;
}
.plat-int-stat-label {
  display: block;
  font-family: var(--f-mono);
  font-size: 9px; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--amber); margin: 6px 0 10px;
}
.plat-int-stat-desc {
  font-size: 13px; font-weight: 300;
  line-height: 1.5; color: var(--ink-500);
}

/* ═══════════════════════════════════════════════
   PLATFORM DEPTH SECTION
   ═══════════════════════════════════════════════ */
.plat-depth-section {
  padding: 104px 0;
  background: var(--warm-50);
  border-bottom: 1px solid var(--warm-200);
}
.depth-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.depth-card {
  padding: 28px 28px 32px;
  background: var(--off-white);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  transition: border-color .2s, box-shadow .2s;
}
.depth-card:hover {
  border-color: var(--warm-300);
  box-shadow: var(--shadow-sm);
}
.depth-tag {
  font-family: var(--f-mono); font-size: 9px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--amber); display: block; margin-bottom: 12px;
}
.depth-card h3 {
  font-family: var(--f-serif); font-size: 20px;
  font-weight: 400;
  line-height: 1.2; color: var(--ink-900);
  letter-spacing: -.01em; margin-bottom: 10px;
}
.depth-card-lead {
  font-size: 13.5px; font-weight: 500;
  color: var(--ink-700); line-height: 1.5;
  margin-bottom: 10px;
}
.depth-card p {
  font-size: 14px; font-weight: 300;
  line-height: 1.6; color: var(--ink-600);
}

/* ═══════════════════════════════════════════════
   CTA SECTION
   ═══════════════════════════════════════════════ */
.cta-section {
  padding: 104px 0;
  background: var(--navy);
  border-top: 1px solid rgba(255,255,255,.08);--amber:#f59e0b;}
.cta-inner { max-width: 640px; margin: 0 auto; text-align: center; }
.cta-inner h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.05; color: var(--white);
  margin: 10px 0 20px;
}
.cta-inner p {
  font-size: 16px; font-weight: 300;
  line-height: 1.55; color: rgba(255,255,255,.7);
  max-width: 480px; margin: 0 auto 36px;
}
.cta-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn-white {
  display: inline-flex; align-items: center;
  font-family: var(--f-sans); font-size: 13.5px; font-weight: 500;
  padding: 11px 22px; border-radius: var(--r-md);
  background: var(--white); color: var(--ink-900);
  border: 1.5px solid var(--white);
  transition: opacity .2s; text-decoration: none;
}
.btn-white:hover { opacity: .9; }
.btn-ghost {
  display: inline-flex; align-items: center;
  font-family: var(--f-sans); font-size: 13.5px; font-weight: 500;
  padding: 11px 22px; border-radius: var(--r-md);
  background: transparent; color: var(--white);
  border: 1.5px solid rgba(255,255,255,.35);
  transition: border-color .2s; text-decoration: none;
}
.btn-ghost:hover { border-color: rgba(255,255,255,.7); }

/* btn-primary / btn-secondary (global fallbacks if nav fetch delays) */
.btn-primary {
  display: inline-flex; align-items: center;
  font-family: var(--f-sans); font-size: 13.5px; font-weight: 500;
  padding: 10px 20px; border-radius: var(--r-md);
  background: var(--ink-900); color: var(--white);
  border: 1.5px solid var(--ink-900); text-decoration: none;
  transition: opacity .2s;--amber:#f59e0b;}
.btn-primary:hover { opacity: .85; }
.btn-secondary {
  display: inline-flex; align-items: center;
  font-family: var(--f-sans); font-size: 13.5px; font-weight: 500;
  padding: 10px 20px; border-radius: var(--r-md);
  background: transparent; color: var(--ink-900);
  border: 1.5px solid var(--ink-900); text-decoration: none;
  transition: background .2s;
}
.btn-secondary:hover { background: var(--warm-50); }

/* ═══════════════════════════════════════════════
   HIGH CONTRAST MODE
   ═══════════════════════════════════════════════ */
body.hc .cta-section   { background: #00102a;--amber:#f59e0b;}
body.hc .cta-inner h2  { color: #ffffff; }
body.hc .cta-inner p   { color: rgba(255,255,255,.85); }

body.hc .chain-url-strip { background: #001830; }
body.hc .code-card       { border-color: var(--warm-200); }
body.hc .pipeline-card   { border-color: var(--warm-200); }
body.hc .pipe-step       { background: var(--warm-50); border-color: var(--warm-100); }
body.hc .plat-diagram-wrap { border-color: var(--warm-200); }

body.hc .deploy-card     { background: var(--warm-50); border-color: var(--warm-200); }
body.hc .depth-card      { background: var(--warm-50); border-color: var(--warm-200); }
body.hc .tool-card       { background: var(--warm-50); border-color: var(--warm-200); }
body.hc .cap-group       { background: var(--warm-50); border-color: var(--warm-200); }
body.hc .int-partner     { border-color: var(--warm-200); color: var(--ink-700); }
body.hc .plat-int-stat-col   { border-color: var(--warm-200); }
body.hc .plat-int-stat       { border-bottom-color: var(--warm-200); }

/* ═══════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .chain-split          { grid-template-columns: 1fr; gap: 48px; }
  .arch-grid            { grid-template-columns: 1fr 1fr; }
  .caps-grid            { grid-template-columns: 1fr 1fr; }
  .tools-grid           { grid-template-columns: 1fr 1fr; }
  .plat-ai-inner        { grid-template-columns: 1fr; gap: 48px; }
  .plat-int-inner       { grid-template-columns: 1fr; gap: 52px; }
  .deploy-grid          { grid-template-columns: 1fr 1fr; }
  .depth-grid           { grid-template-columns: 1fr 1fr; }

  .plat-how-section,
  .plat-chain-section,
  .plat-arch-section,
  .plat-caps-section,
  .plat-tools-section,
  .plat-ai-section,
  .plat-deploy-section,
  .plat-integration-section,
  .plat-depth-section,
  .cta-section          { padding: 80px 0; }
}

@media (max-width: 768px) {
  .page-hero { padding: calc(88px + env(safe-area-inset-top, 0px)) 0 56px; }
  .plat-hero-stats { flex-wrap: wrap; }
  .plat-stat { padding-right: 24px; margin-right: 24px; }
  .plat-stat-num { font-size: clamp(28px, 5vw, 40px); }
  .arch-grid   { grid-template-columns: 1fr; gap: 12px; }
  .caps-grid   { grid-template-columns: 1fr; gap: 14px; }
  .tools-grid  { grid-template-columns: 1fr; gap: 14px; }
  .depth-grid  { grid-template-columns: 1fr; gap: 16px; }
  .deploy-grid { grid-template-columns: 1fr; }
  .plat-diagram-wrap { padding: 16px; }

  .plat-how-section,
  .plat-chain-section,
  .plat-arch-section,
  .plat-caps-section,
  .plat-tools-section,
  .plat-ai-section,
  .plat-deploy-section,
  .plat-integration-section,
  .plat-depth-section,
  .cta-section          { padding: 64px 0; }
}

@media (max-width: 480px) {
  .cta-btns { flex-direction: column; align-items: center; }

  .plat-how-section,
  .plat-chain-section,
  .plat-arch-section,
  .plat-caps-section,
  .plat-tools-section,
  .plat-ai-section,
  .plat-deploy-section,
  .plat-integration-section,
  .plat-depth-section,
  .cta-section          { padding: 52px 0; }
}


/* ═══════════════════════════════════════════════════════
   IMAGE PLACEHOLDERS — remove once real assets are ready
   ═══════════════════════════════════════════════════════ */

.img-placeholder {
  background: var(--warm-100);
  border: 1.5px dashed var(--warm-300);
  border-radius: var(--r-md);
  overflow: hidden;
  width: 100%;
}

.img-placeholder-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px 20px;
  gap: 8px;
  color: var(--ink-500);
}

.img-placeholder-inner svg {
  width: 28px;
  height: 28px;
  color: var(--warm-400);
  flex-shrink: 0;
  margin-bottom: 4px;
}

.img-placeholder-inner strong {
  font-family: var(--f-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-600);
  display: block;
}

.img-placeholder-inner p {
  font-size: 12px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--ink-500);
  max-width: 420px;
  margin: 0;
}

.img-placeholder-inner code {
  font-family: var(--f-mono);
  font-size: 11px;
  background: var(--warm-200);
  padding: 1px 4px;
  border-radius: 3px;
}

/* Size variants */
.img-placeholder--output {
  margin-top: 16px;
  min-height: 200px;
}

.img-placeholder--cap {
  margin-top: 16px;
  min-height: 160px;
}

.img-placeholder--deploy {
  margin-top: 20px;
  min-height: 120px;
  background: rgba(0,0,0,.04);
  border: 1.5px dashed var(--warm-300);
}


.img-placeholder--tool {
  margin-top: 16px;
  min-height: 180px;
}

/* Chain output wrapper */
.chain-output-preview {
  margin-top: 12px;
}

.chain-output-label {
  display: block;
  font-family: var(--f-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 8px;
}


/* ═══════════════════════════════════════════════════════
   STICKY SUBNAV
   ═══════════════════════════════════════════════════════ */

.plat-subnav {
  position: sticky;
  top: 60px;
  z-index: 900;
  background: var(--navy);
  border-bottom: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 2px 12px rgba(14,14,12,.12);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .3s ease, opacity .25s ease;
  pointer-events: none;--amber:#f59e0b;}

.plat-subnav.visible {
  max-height: 60px;
  overflow: visible;
  opacity: 1;
  pointer-events: auto;
}

.plat-subnav .wrap {
  padding-top: 0;
  padding-bottom: 0;
  position: relative;
}

/* Fade-out right edge — signals more items off-screen on mobile */
.plat-subnav .wrap::after {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 48px;
  background: linear-gradient(to right, transparent, var(--navy));
  pointer-events: none;
  display: none; /* shown only on mobile via media query */;--amber:#f59e0b;}

.plat-subnav-list {
  display: flex;
  list-style: none;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.plat-subnav-list::-webkit-scrollbar { display: none; }

.plat-subnav-link {
  display: block;
  padding: 13px 16px;
  font-family: var(--f-sans);
  font-size: 12.5px;
  font-weight: 400;
  color: rgba(255,255,255,.55);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}

.plat-subnav-link:hover {
  color: rgba(255,255,255,.9);
}

.plat-subnav-link.active {
  color: var(--white);
  font-weight: 500;
  border-bottom-color: var(--amber);
}

/* ── Inline CTAs ── */
.plat-inline-cta {
  background: var(--white);
  border-bottom: 1px solid var(--warm-200);
  padding: 28px 0;
}

.plat-inline-cta .wrap {
  padding-top: 0;
  padding-bottom: 0;
}

.plat-inline-cta p {
  font-size: 14px;
  font-weight: 300;
  color: var(--ink-600);
  margin: 0;
  border-left: 3px solid var(--amber);
  padding-left: 18px;
  padding-top: 3px;
  padding-bottom: 3px;
}

.plat-inline-cta-link {
  font-weight: 500;
  color: var(--ink-900);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color .15s;
}

.plat-inline-cta-link:hover {
  color: var(--blue);
}

/* HC overrides */
body.hc .plat-subnav { background: #00102a; border-bottom-color: rgba(255,255,255,.12);--amber:#f59e0b;}

body.hc .plat-inline-cta {
  background: var(--warm-100);
  border-color: var(--warm-300);
}

/* Mobile: smaller subnav text, show scroll-fade cue */
@media (max-width: 768px) {
  .plat-subnav-link { font-size: 12px; padding: 11px 12px; }
  .plat-subnav .wrap::after { display: block; }
}


/* ═══════════════════════════════════════════════════════
   TOOL VIEWERS (iframes replacing placeholders)
   ═══════════════════════════════════════════════════════ */

.tool-viewer-wrap {
  margin-top: 16px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--warm-200);
  box-shadow: var(--shadow-md);
  background: var(--white);
  aspect-ratio: 4 / 3;
  position: relative;
}

.tool-viewer-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.tool-card-link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--f-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-900);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color .15s;
}

.tool-card-link:hover { color: var(--blue); }


/* ═══════════════════════════════════════════════════════
   CHAIN LANGUAGE — playground CTA
   ═══════════════════════════════════════════════════════ */

.chain-playground-cta {
  margin-top: 48px;
  padding: 28px 32px;
  background: var(--warm-50);
  border: 1px solid var(--warm-200);
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.chain-playground-cta p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--ink-600);
  margin: 0;
  max-width: 480px;
}

@media (max-width: 768px) {
  .chain-playground-cta {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    padding: 24px 20px;
  }
}


/* ═══════════════════════════════════════════════════════
   INTEGRATION — ecosystem source logos
   ═══════════════════════════════════════════════════════ */

.plat-int-sources-note {
  font-size: 13px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--ink-500);
  max-width: 420px;
  margin-bottom: 16px;
}

.int-source-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.int-source-pill {
  height: 36px;
  padding: 0 14px;
  background: var(--white);
  border: 1px solid var(--warm-200);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-xs);
}

.int-source-pill img {
  height: 18px;
  width: auto;
  display: block;
  object-fit: contain;
}


/* ═══════════════════════════════════════════════════════
   SECURE ENCLAVE — distinct card treatment
   ═══════════════════════════════════════════════════════ */

/* Secure Enclave — same card bg as others, tag signals distinction */
.deploy-card--secure .deploy-card-tag--secure {
  color: var(--amber);
}

/* deploy-card--secure HC: inherits standard card HC rules */


/* ═══════════════════════════════════════════════════════
   OWNERSHIP SECTION
   ═══════════════════════════════════════════════════════ */

.plat-ownership-section {
  padding: 104px 0;
  background: var(--navy);--amber:#f59e0b;}

.plat-ownership-section .section-tag { color: var(--amber); }

.plat-ownership-section h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.1;
  color: var(--white);
}

.plat-ownership-section > .wrap > .section-header p {
  color: rgba(255,255,255,.6);
  max-width: 560px;
}

.ownership-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 52px;
}

.ownership-card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--r-lg);
  padding: 44px 36px;
  transition: background .2s;
}

.ownership-card:hover {
  background: rgba(255,255,255,.07);
}

.ownership-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  background: rgba(180,83,9,.15);
  color: var(--amber);
  margin-bottom: 20px;
}

.ownership-card-icon svg {
  width: 20px;
  height: 20px;
}

.ownership-card h3 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: 20px;
  line-height: 1.2;
  color: var(--white);
  margin-bottom: 12px;
}

.ownership-card p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.65;
  color: rgba(255,255,255,.65);
  margin: 0;
}

/* HC overrides */
body.hc .plat-ownership-section { background: #00102a;--amber:#f59e0b;}
body.hc .ownership-card { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.12); }
body.hc .ownership-card h3 { color: #ffffff; }
body.hc .ownership-card p { color: rgba(255,255,255,.8); }

/* Responsive */
@media (max-width: 1024px) {
  .plat-ownership-section { padding: 80px 0; }
}

@media (max-width: 768px) {
  .plat-ownership-section { padding: 64px 0; }
  .ownership-grid { grid-template-columns: 1fr; gap: 16px; }
}

@media (max-width: 480px) {
  .plat-ownership-section { padding: 52px 0; }
  .ownership-card { padding: 24px 20px; }
}

/* ═══════════════════════════════════════════════
   CHAIN SECTION — navy background overrides
   ═══════════════════════════════════════════════ */
.plat-chain-section .section-tag { color: var(--amber); }
.plat-chain-section .section-header h2 { color: var(--white); }
.plat-chain-section .section-header p { color: rgba(255,255,255,.6); }
.plat-chain-section .chain-prop h3 { color: var(--white); }
.plat-chain-section .chain-prop p { color: rgba(255,255,255,.65); }
.plat-chain-section .chain-prop-icon {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.12);
  color: rgba(255,255,255,.7);
}
.plat-chain-section .chain-playground-cta {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.12);
}
.plat-chain-section .chain-playground-cta p { color: rgba(255,255,255,.65); }
.plat-chain-section .chain-playground-cta .btn-primary {
  background: var(--white);
  color: var(--ink-900);
  border-color: var(--white);
}
.plat-chain-section .chain-playground-cta .btn-primary:hover { opacity: .9; }
/* HC overrides for navy chain section */
body.hc .plat-chain-section { background: #00102a;--amber:#f59e0b;}
body.hc .plat-chain-section .section-header h2 { color: #ffffff; }
body.hc .plat-chain-section .chain-prop h3 { color: #ffffff; }


.cap-command {
  margin-top: auto;
  padding-top: 20px;
}
.cap-command pre {
  margin: 0;
  padding: 14px 16px;
  background: var(--ink-800);
  border-radius: var(--r-md);
  font-family: var(--f-mono);
  font-size: 11.5px;
  line-height: 1.65;
  color: var(--warm-200);
  white-space: pre-wrap;
  word-break: break-all;
  overflow: hidden;
}
.cap-command .c-key { color: #94b8d4; }
.cap-command .c-fn  { color: var(--warm-300); }
.cap-command .c-str { color: #7ec8a0; }
.cap-command .c-pun { color: var(--ink-400); }

/* ═══════════════════════════════════════════════
   BREAKER — light separator between ownership and CTA
   ═══════════════════════════════════════════════ */
.plat-breaker {
  padding: 72px 0;
  background: var(--warm-50);
  border-top: 1px solid var(--warm-200);
  border-bottom: 1px solid var(--warm-200);
}
.plat-breaker-inner {
  display: grid;
  grid-template-columns: 200px 1px 1fr 1px 200px;
  gap: 52px;
  align-items: center;
}
.plat-breaker-divider {
  width: 1px;
  height: 100%;
  min-height: 60px;
  background: var(--warm-200);
  justify-self: center;
}
.plat-breaker-stat {
  text-align: center;
}
.plat-breaker-num {
  display: block;
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(40px, 4.5vw, 60px);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ink-900);
}
.plat-breaker-label {
  display: block;
  font-family: var(--f-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-400);
  margin-top: 10px;
}
.plat-breaker-copy p {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--ink-600);
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
}

@media (max-width: 1024px) {
  .plat-breaker-inner {
    grid-template-columns: 160px 1px 1fr 1px 160px;
    gap: 36px;
  }
}
@media (max-width: 768px) {
  .plat-breaker { padding: 52px 0; }
  .plat-breaker-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .plat-breaker-divider { width: 40px; height: 1px; min-height: auto; }
  .plat-breaker-stat { text-align: left; }
  .plat-breaker-copy p { text-align: left; }
}

/* ═══════════════════════════════════════════════
   SOCIAL PROOF SECTION
   ═══════════════════════════════════════════════ */
.plat-social-section {
  padding: 72px 0 0;
  background: var(--white);
  border-bottom: 1px solid var(--warm-200);
}

/* Centered single-column header — overline above, headline + sub centred */
.plat-social-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 52px;
}

.plat-social-header .section-tag {
  margin-bottom: 16px;
}

.plat-social-headline h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(24px, 2.8vw, 38px);
  line-height: 1.12;
  color: var(--ink-900);
  letter-spacing: -.02em;
  margin-bottom: 16px;
  max-width: 680px;
}

.plat-social-headline p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--ink-500);
  max-width: 560px;
  margin: 0 auto;
}

/* Logo band — white inset strip, clearly distinct from off-white section */
.plat-logo-band {
  overflow: hidden;
  position: relative;
  padding: 22px 0;
  background: var(--white);
  border-top: 1px solid var(--warm-200);
  border-bottom: 1px solid var(--warm-200);
}
.plat-logo-band::before,
.plat-logo-band::after {
  content: '';
  position: absolute; top: 0; bottom: 0;
  width: 120px; z-index: 2; pointer-events: none;
}
.plat-logo-band::before { left: 0;  background: linear-gradient(90deg,  var(--white), transparent); }
.plat-logo-band::after  { right: 0; background: linear-gradient(270deg, var(--white), transparent); }
.plat-logo-band .logo-track {
  display: flex;
  width: max-content;
  align-items: center;
  animation: plat-lscroll 120s linear infinite;
  will-change: transform;
}
.plat-logo-band:hover .logo-track { animation-play-state: paused; }
@keyframes plat-lscroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.plat-logo-band .logo-img {
  height: 30px; width: auto; object-fit: contain;
  flex-shrink: 0; padding: 0 36px;
  opacity: .5; filter: grayscale(1);
  transition: opacity .2s, filter .2s;
  display: block;
}
.plat-logo-band .logo-img:hover { opacity: .8; filter: grayscale(0); }

/* Three stats — centred, balanced thirds */
.plat-social-stats {
  display: flex;
  gap: 0;
  padding: 44px 0 60px;
  justify-content: center;
}
.plat-social-stat {
  flex: 1;
  max-width: 260px;
  padding: 0 40px;
  border-right: 1px solid var(--warm-200);
  text-align: center;
}
.plat-social-stat:first-child { padding-left: 0; text-align: left; }
.plat-social-stat:last-child  { border-right: none; padding-right: 0; text-align: right; }

.plat-social-stat-num {
  display: block;
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(36px, 4vw, 52px);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ink-900);
}
.plat-social-stat-label {
  display: block;
  font-family: var(--f-mono);
  font-size: 9px; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-400);
  margin-top: 10px;
  line-height: 1.5;
}

/* HC override */
body.hc .plat-social-section { background: var(--warm-50); }
body.hc .plat-logo-band       { background: var(--white); border-color: var(--warm-300); }

/* Responsive */
@media (max-width: 1024px) {
  .plat-social-section { padding: 64px 0 0; }
}
@media (max-width: 768px) {
  .plat-social-section { padding: 52px 0 0; }
  .plat-social-headline h2 { font-size: clamp(22px, 5vw, 30px); }
  .plat-social-stats { flex-direction: column; align-items: flex-start; gap: 0; padding: 32px 0 40px; }
  .plat-social-stat { max-width: 100%; padding: 20px 0; border-right: none; border-bottom: 1px solid var(--warm-200); text-align: left !important; }
  .plat-social-stat:last-child { border-bottom: none; }
}

/* ═══════════════════════════════════════════════
   TRANSITION STRIP — between Ownership (navy) and CTA (navy)
   ═══════════════════════════════════════════════ */
.plat-transition-strip {
  padding: 52px 0;
  background: var(--warm-50);
  border-top: 1px solid var(--warm-200);
  border-bottom: 1px solid var(--warm-200);
}
.plat-transition-text {
  font-family: var(--f-serif);
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 400;
  line-height: 1.4;
  color: var(--ink-700);
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  letter-spacing: -.01em;
}
/* Remove the hairline border from CTA now — transition strip does that job */
.cta-section { border-top: none; }

@media (max-width: 768px) {
  .plat-transition-strip { padding: 40px 0; }
  .plat-transition-text  { text-align: left; }
}

/* ═══════════════════════════════════════════════
   PLATFORM DEPTH — editorial split
   ═══════════════════════════════════════════════ */
.depth-editorial {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 80px;
  align-items: start;
}
.depth-claim {
  position: sticky;
  top: 80px; /* clears the subnav */
}
.depth-claim .section-tag { margin-bottom: 14px; display: block; }
.depth-claim h2 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: clamp(26px, 2.8vw, 38px);
  line-height: 1.1;
  color: var(--ink-900);
  letter-spacing: -.02em;
  margin-bottom: 16px;
}
.depth-claim p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--ink-600);
}
.depth-items {
  display: flex;
  flex-direction: column;
}
.depth-item {
  padding: 32px 0;
  border-top: 1px solid var(--warm-200);
}
.depth-item:last-child {
  border-bottom: 1px solid var(--warm-200);
}
.depth-item .depth-tag {
  display: block;
  font-family: var(--f-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 10px;
}
.depth-item h3 {
  font-family: var(--f-serif);
  font-weight: 400;
  font-size: 20px;
  line-height: 1.2;
  color: var(--ink-900);
  letter-spacing: -.01em;
  margin-bottom: 10px;
}
.depth-item p {
  font-size: 13.5px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--ink-600);
}

/* ── Responsive: arch-lead and depth-editorial ── */
@media (max-width: 1024px) {
  .depth-editorial { grid-template-columns: 1fr; gap: 40px; }
  .depth-claim { position: static; }
  .arch-lead-text {
    grid-template-columns: 1fr;
    padding: 36px 36px;
    gap: 20px 0;
  }
  .arch-lead-text h3 { grid-column: 1 / -1; }
  .arch-lead-text p  { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  .arch-lead-text { padding: 28px 24px; }
  .plat-stat {
    flex: 0 0 calc(50% - 20px);
    border-right: none;
    padding-right: 0;
    margin-right: 0;
    border-bottom: 1px solid var(--warm-200);
    padding-bottom: 24px;
    margin-bottom: 24px;
  }
  .plat-stat:nth-child(3),
  .plat-stat:nth-child(4) { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
}
@media (max-width: 480px) {
  .plat-stat { flex: 0 0 100%; }
  .plat-stat:nth-child(3) { border-bottom: 1px solid var(--warm-200); padding-bottom: 24px; margin-bottom: 24px; }
}

/* ── HC overrides for new elements ── */
body.hc .arch-lead { background: #00102a;--amber:#f59e0b;}
body.hc .arch-lead-text h3 { color: #ffffff; }
body.hc .arch-lead-text p  { color: rgba(255,255,255,.85); }
body.hc .depth-item { border-color: var(--warm-200); }

/* ═══════════════════════════════════════════════════════════
   COMPREHENSIVE RESPONSIVE OVERRIDES
   Mobile-first additions — min-width breakpoints
   ═══════════════════════════════════════════════════════════ */

/* ── Base mobile (all screens < 640px) ── */
@media (max-width: 639px) {

  /* Prevent any horizontal overflow */
  body { overflow-x: hidden; }
  .wrap { padding: 0 20px; }

  /* Hero */
  .page-hero { padding: calc(80px + env(safe-area-inset-top, 0px)) 0 48px; }
  .page-hero h1 { font-size: clamp(28px, 8vw, 40px); margin-bottom: 14px; }
  .page-hero-sub { font-size: 15px; }

  /* Hero stats — single column */
  .plat-hero-stats {
    flex-direction: column;
    gap: 0;
    margin-top: 32px;
    padding-top: 24px;
  }
  .plat-stat {
    flex: 0 0 auto;
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--warm-200);
    padding: 16px 0;
    margin: 0;
  }
  .plat-stat:last-child { border-bottom: none; }
  .plat-stat-num { font-size: clamp(28px, 8vw, 40px); }

  /* Section headers */
  .section-header h2 { font-size: clamp(22px, 6vw, 30px); }

  /* Diagram canvas — let it fill width */
  .plat-diagram-wrap { border-radius: var(--r-lg); }

  /* Architecture */
  .arch-lead-text {
    grid-template-columns: 1fr;
    padding: 24px 20px;
    gap: 16px 0;
  }
  .arch-lead-text h3 { grid-column: 1 / -1; font-size: clamp(20px, 5.5vw, 28px); }
  .arch-lead-text p  { grid-column: 1 / -1; font-size: 13.5px; }
  .arch-grid { grid-template-columns: 1fr; gap: 16px; }

  /* Deployment */
  .deploy-grid { grid-template-columns: 1fr; gap: 16px; }
  .deploy-card { padding: 24px 20px; }

  /* Integration */
  .plat-int-inner { flex-direction: column; gap: 40px; }
  .plat-int-stat-col { flex-direction: row; flex-wrap: wrap; gap: 16px; }
  .plat-int-stat { flex: 0 0 calc(50% - 8px); min-width: 0; }
  .plat-int-stat-num { font-size: clamp(36px, 10vw, 52px); }
  .int-partner-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .int-source-grid { gap: 8px; flex-wrap: wrap; }

  /* Chain language */
  .chain-split { flex-direction: column; gap: 32px; }
  .chain-code-col, .chain-props-col { width: 100%; }
  .code-body { font-size: 11px; }
  .chain-url-value { font-size: 10px; word-break: break-all; }

  /* Capabilities */
  .caps-grid { grid-template-columns: 1fr; gap: 24px; }
  .cap-command pre { font-size: 10.5px; overflow-x: auto; }

  /* Tools */
  .tools-tabs { border-radius: var(--r-md); overflow-x: auto; }
  .tools-tab-btn { flex: 0 0 auto; padding: 9px 14px; font-size: 11px; min-height: 44px; }
  .tools-panel.on { grid-template-columns: 1fr; gap: 24px; }
  .tools-panel-viewer { aspect-ratio: 4/3; max-width: 100%; }
  .tools-panel-info { padding: 0; }

  /* AI Packs */
  .plat-ai-inner { flex-direction: column; gap: 32px; }
  .pipeline-card { padding: 20px 16px; }
  .pipe-step strong { font-size: 10.5px; word-break: break-all; }

  /* Platform depth */
  .depth-editorial { grid-template-columns: 1fr; gap: 32px; }
  .depth-claim { position: static; }
  .depth-claim h2 { font-size: clamp(22px, 6vw, 32px); }

  /* Ownership */
  .ownership-grid { grid-template-columns: 1fr; gap: 12px; }
  .ownership-card { padding: 28px 20px; }

  /* CTA */
  .cta-section h2 { font-size: clamp(24px, 7vw, 36px); }
  .cta-btns { flex-direction: column; gap: 12px; align-items: stretch; }
  .cta-btns a { text-align: center; width: 100%; padding: 14px 20px; min-height: 44px; }

  /* Subnav */
  .plat-subnav-link { font-size: 11px; padding: 10px 12px; min-height: 44px; display: flex; align-items: center; }

  /* All buttons min tap target */
  .btn-primary, .btn-secondary, .btn-white, .btn-ghost, .btn-nav {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* Transition strip */
  .plat-transition-text { font-size: clamp(15px, 4.5vw, 18px); text-align: center; }

  /* Inline CTAs */
  .plat-inline-cta p { font-size: 13px; }
  .plat-inline-cta-link { display: inline-block; margin-top: 4px; }

  /* Logo band */
  .plat-logo-band { padding: 24px 0; }
}

/* ── Tablet (640px – 1023px) ── */
@media (min-width: 640px) and (max-width: 1023px) {
  .wrap { padding: 0 32px; }

  .page-hero h1 { font-size: clamp(32px, 5.5vw, 52px); }
  .plat-hero-stats { flex-wrap: wrap; gap: 0; }
  .plat-stat { flex: 0 0 50%; border-right: none; border-bottom: 1px solid var(--warm-200); padding: 20px 0; margin: 0; }
  .plat-stat:nth-child(odd) { padding-right: 20px; }
  .plat-stat:nth-child(3), .plat-stat:nth-child(4) { border-bottom: none; }

  .arch-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .deploy-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .caps-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .ownership-grid { grid-template-columns: 1fr 1fr; gap: 12px; }

  .plat-int-inner { flex-direction: column; gap: 48px; }
  .plat-int-stat-col { flex-direction: row; gap: 24px; }
  .plat-int-stat { flex: 1; }

  .chain-split { flex-direction: column; gap: 40px; }

  .tools-panel.on { grid-template-columns: 1fr; gap: 28px; }
  .tools-panel-viewer { max-width: 560px; }

  .plat-ai-inner { flex-direction: column; gap: 40px; }

  .cta-btns { justify-content: center; }
}

/* ── Ensure no container exceeds viewport ── */
@media (max-width: 1200px) {
  .plat-int-inner { gap: 40px; }
  .plat-diagram-wrap canvas { width: 100% !important; height: auto !important; }
}

/* ── Focus-visible styles for accessibility ── */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Images always responsive ── */
img { max-width: 100%; height: auto; display: block; }


/* ═══════════════════════════════════════════════════════════
   SIGNAL BAND — plat- prefix
   ═══════════════════════════════════════════════════════════ */
.plat-signal-section { background: var(--navy);--amber:#f59e0b;}
.plat-signal-band {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: stretch;
}
.plat-signal-item {
  padding: 48px 40px;
  display: flex; flex-direction: column; gap: 12px;
}
.plat-signal-num {
  font-family: var(--f-serif); font-weight: 400;
  font-size: clamp(26px, 2.8vw, 38px);
  line-height: 1; letter-spacing: -.03em;
  color: var(--white); display: block;
}
.plat-signal-label {
  font-size: 12px; font-weight: 300; line-height: 1.55;
  color: rgba(255,255,255,.5);
  display: block; min-height: 4em;
}
.plat-signal-div {
  width: 1px; background: rgba(255,255,255,.1); align-self: stretch;
}

body.hc .plat-signal-section { background: #00102a;--amber:#f59e0b;}
body.hc .plat-signal-num { color: #ffffff; }
body.hc .plat-signal-label { color: rgba(255,255,255,.75); }

@media (max-width: 1024px) {
  .plat-signal-band { grid-template-columns: 1fr 1fr; }
  .plat-signal-div { display: none; }
  .plat-signal-item { padding: 36px 32px; }
  .plat-signal-item:nth-child(odd) { border-right: 1px solid rgba(255,255,255,.1); }
  .plat-signal-item:nth-child(1),
  .plat-signal-item:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,.1); }
  .plat-signal-label { min-height: auto; }
}
@media (max-width: 768px) {
  .plat-signal-band { grid-template-columns: 1fr; }
  .plat-signal-item {
    padding: 28px 20px;
    border-right: none !important;
    border-bottom: 1px solid rgba(255,255,255,.1) !important;
  }
  .plat-signal-item:last-child { border-bottom: none !important; }
}

/* ═══════════════════════════════════════════════════════════
   CTA SECTION — plat- prefix
   ═══════════════════════════════════════════════════════════ */
.plat-cta-section {
  background: var(--navy); padding: 104px 52px;
  text-align: center; position: relative; overflow: hidden;--amber:#f59e0b;}
.plat-cta-section::before {
  content: ''; position: absolute;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(30,74,128,.3), transparent 65%);
  top: 50%; left: 50%; transform: translate(-50%,-50%); pointer-events: none;
}
.plat-cta-section::after {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,1) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .07;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 70%);
  pointer-events: none;
}
.plat-cta-inner { position: relative; z-index: 2; }
.plat-cta-section .section-tag {
  color: var(--amber); margin-bottom: 18px;
}
.plat-cta-inner h2 {
  font-family: var(--f-serif); font-weight: 400;
  font-size: clamp(30px, 4vw, 52px);
  color: var(--white); letter-spacing: -.025em;
  line-height: 1.05; margin-bottom: 14px;
}
.plat-cta-inner p {
  font-size: 16px; font-weight: 300; color: rgba(255,255,255,.92);
  max-width: 380px; margin: 0 auto 32px; line-height: 1.55;
}
.plat-cta-btns {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap;
}
.plat-cta-section .btn-white {
  font-size: 13.5px; font-weight: 500; letter-spacing: -.01em;
  padding: 12px 28px; border-radius: var(--r-sm);
  background: var(--white); color: var(--navy); border: none;
  box-shadow: 0 2px 8px rgba(0,0,0,.12);
  text-decoration: none; display: inline-flex; align-items: center;
  transition: opacity .18s, transform .1s;
}
.plat-cta-section .btn-white:hover { opacity: .93; }
.plat-cta-section .btn-white:active { transform: scale(.98); }

body.hc .plat-cta-section { background: #00102a;--amber:#f59e0b;}
body.hc .plat-cta-inner h2 { color: #ffffff; }
body.hc .plat-cta-inner p { color: rgba(255,255,255,.8); }

@media (max-width: 768px) {
  .plat-cta-section { padding: 72px 20px; }
}
@media (max-width: 480px) {
  .plat-cta-section { padding: 56px 16px; }
}