/* Base Design Tokens (Executive Metallurgy: Intent Brand System) */
:root {
  --color-primary: #D4AF87;
  --color-bg: #090A0E;
  --color-chassis: #12151D;
  --color-core: #181C26;
  --color-hover: #1F2430;
  --color-border: #1E222D;
  --color-text: #F4F5F8;
  --color-text-muted: #8E94A0;
  --color-accent: #D4AF87;
  --color-badge-bg: #24201C;
  --color-badge-border: #4E4032;
  --font-display-family: Geist;
  --font-display-size: 48px;
  --font-display-weight: 800;
  --font-display-line-height: 1.08;
  --font-display-letter-spacing: -0.04em;
  --font-title-family: Geist;
  --font-title-size: 26px;
  --font-title-weight: 700;
  --font-title-line-height: 1.2;
  --font-title-letter-spacing: -0.035em;
  --font-body-family: Geist;
  --font-body-size: 16px;
  --font-body-weight: 400;
  --font-body-line-height: 1.65;
  --font-label-family: Geist;
  --font-label-size: 14px;
  --font-label-weight: 500;
  --font-label-line-height: 1.4;
  --font-mono-family: Geist Mono;
  --font-mono-size: 13px;
  --font-mono-weight: 500;
  --font-mono-line-height: 1.5;
  --font-mono-feature: tnum;
  --font-body: 400 16px/1.65 var(--font-body-family, Geist), -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-label: 500 14px/1.4 var(--font-label-family, Geist), -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 500 13px/1.5 var(--font-mono-family, "Geist Mono"), ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --radius-sm: 6px;
  --radius-core: 11px;
  --radius-chassis: 16px;
  --radius-pill: 9999px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --component-page-background-color: var(--color-bg);
  --component-page-text-color: var(--color-text);
  --component-page-typography: var(--font-body);
  --component-chassis-background-color: var(--color-chassis);
  --component-chassis-text-color: var(--color-text);
  --component-chassis-rounded: var(--radius-chassis);
  --component-core-background-color: var(--color-core);
  --component-core-text-color: var(--color-text);
  --component-core-typography: var(--font-body);
  --component-core-rounded: var(--radius-core);
  --component-button-primary-background-color: var(--color-text);
  --component-button-primary-text-color: var(--color-bg);
  --component-button-primary-typography: var(--font-label);
  --component-button-primary-rounded: var(--radius-pill);
  --component-button-primary-padding: 10px 18px;
  --component-button-primary-hover-background-color: var(--color-accent);
  --component-button-primary-hover-text-color: var(--color-bg);
  --component-button-primary-hover-typography: var(--font-label);
  --component-button-secondary-background-color: var(--color-chassis);
  --component-button-secondary-text-color: var(--color-text);
  --component-button-secondary-typography: var(--font-label);
  --component-button-secondary-rounded: var(--radius-pill);
  --component-button-secondary-padding: 10px 18px;
  --component-eyebrow-badge-background-color: var(--color-badge-bg);
  --component-eyebrow-badge-text-color: var(--color-accent);
  --component-eyebrow-badge-typography: var(--font-mono);
  --component-eyebrow-badge-rounded: var(--radius-pill);
  --component-helper-text-background-color: var(--color-bg);
  --component-helper-text-text-color: var(--color-text-muted);
  --component-helper-text-typography: var(--font-mono);
  --component-scope-cell-background-color: var(--color-bg);
  --component-scope-cell-text-color: var(--color-accent);
  --component-scope-cell-typography: var(--font-mono);
}

/* ==========================================================================
   PERSONAL-PAGE V2 STYLESHEET (FROM SCRATCH)
   Executive Metallurgy: Gaggenau Monolithic Mass & Bang & Olufsen Tactile Restraint
   Conforms to DESIGN.md, tokens.css, and brand/PATTERNS/executive-portfolio.md
   Zero reused components from previous version.
   ========================================================================== */

/* --------------------------------------------------------------------------
   THEME FOUNDATIONS & TOKEN ADAPTATIONS
   -------------------------------------------------------------------------- */
:root {
  /* Extended design tokens referencing tokens.css base */
  --font-stack-sans: var(--font-display-family, Geist), -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-stack-mono: var(--font-mono-family, "Geist Mono"), ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Elevation and Hairline Tokens */
  --shadow-chassis: 0 16px 48px rgba(0, 0, 0, 0.65);
  --shadow-plate: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-button: 0 2px 8px rgba(0, 0, 0, 0.25);
  --hairline-width: 1px;
  --motion-duration-standard: 280ms;
  --motion-easing-mechanical: cubic-bezier(0.25, 1, 0.5, 1);

  /* Container Boundaries */
  --container-max-width: 1240px;
  --container-gutter: clamp(16px, 4vw, 40px);

  /* Micro-surface highlights */
  --spec-glow: rgba(212, 175, 135, 0.08);
  --focus-ring-color: var(--color-accent);
}

/* Light Theme Precision Adaptation (Silver Anodized Aluminum & Dark Graphite) */
[data-theme="light"] {
  --color-bg: #F5F7FA;
  --color-chassis: #FFFFFF;
  --color-core: #EAEEF4;
  --color-hover: #DFE4EC;
  --color-border: #D1D7E2;
  --color-text: #0E1116;
  --color-text-muted: #535B6A;
  --color-accent: #9A6A38;
  --color-badge-bg: #EFE8DF;
  --color-badge-border: #D5C2AB;

  --shadow-chassis: 0 16px 40px rgba(15, 23, 42, 0.07);
  --shadow-plate: 0 6px 18px rgba(15, 23, 42, 0.04);
  --shadow-button: 0 2px 6px rgba(15, 23, 42, 0.08);
  --spec-glow: rgba(154, 106, 56, 0.06);
  --focus-ring-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   RESET & SYSTEM BASE
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-stack-sans);
  font-size: var(--font-body-size);
  font-weight: var(--font-body-weight);
  line-height: var(--font-body-line-height);
  letter-spacing: -0.01em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--motion-duration-standard) var(--motion-easing-mechanical),
              color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

/* Tabular figures for numbers across all contexts */
.tabular-data,
time,
.metric-figure,
.spec-code {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

/* --------------------------------------------------------------------------
   ACCESSIBILITY & SKIP LINK (UI-03, UI-04, UI-05)
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 24px;
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: 12px 20px;
  font-family: var(--font-stack-mono);
  font-size: var(--font-mono-size);
  font-weight: 600;
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
  transition: top 180ms ease;
}

.skip-link:focus {
  top: 16px;
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

:focus-visible {
  outline: 2px solid var(--focus-ring-color);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --------------------------------------------------------------------------
   LAYOUT CONTAINERS & RHYTHM
   -------------------------------------------------------------------------- */
.site-container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-gutter);
  padding-right: var(--container-gutter);
}

.stage-section {
  padding-top: clamp(64px, 8vw, 112px);
  padding-bottom: clamp(64px, 8vw, 112px);
  border-bottom: var(--hairline-width) solid var(--color-border);
}

.stage-section:last-of-type {
  border-bottom: none;
}

/* Section Header Typography */
.section-meta {
  margin-bottom: clamp(32px, 5vw, 56px);
  max-width: 720px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-stack-mono);
  font-size: var(--font-mono-size);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.section-headline {
  font-family: var(--font-stack-sans);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: var(--font-title-letter-spacing);
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.section-lead {
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   MASTHEAD & NAVIGATION (NEW COMPONENT: site-masthead)
   -------------------------------------------------------------------------- */
.site-masthead {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(9, 10, 14, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: var(--hairline-width) solid var(--color-border);
  transition: background-color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

[data-theme="light"] .site-masthead {
  background-color: rgba(245, 247, 250, 0.9);
}

.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-md);
}

.brand-monogram-lockup {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  text-decoration: none;
  color: var(--color-text);
}

.brand-monogram-symbol {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: block;
}

.brand-monogram-identity {
  display: flex;
  flex-direction: column;
}

.brand-domain-title {
  font-family: var(--font-stack-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.2;
}

.brand-descriptor {
  font-family: var(--font-stack-mono);
  font-size: 11px;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  text-transform: lowercase;
}

.masthead-navigation {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--space-lg);
}

.nav-anchor {
  font-family: var(--font-stack-sans);
  font-size: var(--font-label-size);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 8px 4px;
  position: relative;
  transition: color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

.nav-anchor:hover {
  color: var(--color-text);
}

.nav-anchor[aria-current="page"] {
  color: var(--color-text);
}

.nav-anchor[aria-current="page"]::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 4px;
  right: 4px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-pill);
}

.masthead-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.theme-switch-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background-color: var(--color-chassis);
  color: var(--color-text-muted);
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 8px 14px;
  font-family: var(--font-stack-mono);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px; /* Touch target UI-05 */
  min-width: 44px;
  transition: background-color var(--motion-duration-standard) var(--motion-easing-mechanical),
              color var(--motion-duration-standard) var(--motion-easing-mechanical),
              border-color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

.theme-switch-btn:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
}

.theme-icon-glyph {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
}

/* Mobile Nav Drawer Trigger */
.menu-trigger-btn {
  display: none;
  background: none;
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   BUTTONS & FUNCTIONAL TRIGGERS
   -------------------------------------------------------------------------- */
.action-button-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  background-color: var(--color-text);
  color: var(--color-bg);
  border: none;
  border-radius: var(--radius-pill);
  padding: var(--component-button-primary-padding);
  font-family: var(--font-stack-sans);
  font-size: var(--font-label-size);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  min-height: 44px;
  box-shadow: var(--shadow-button);
  transition: background-color var(--motion-duration-standard) var(--motion-easing-mechanical),
              color var(--motion-duration-standard) var(--motion-easing-mechanical),
              transform 160ms var(--motion-easing-mechanical);
}

.action-button-primary:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

.action-button-primary .icon-pip-bubble {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background-color: var(--color-bg);
  color: var(--color-text);
  border-radius: var(--radius-pill);
  transition: transform var(--motion-duration-standard) var(--motion-easing-mechanical);
}

.action-button-primary:hover .icon-pip-bubble {
  transform: translateX(2px);
}

.action-button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  background-color: var(--color-chassis);
  color: var(--color-text);
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: var(--component-button-secondary-padding);
  font-family: var(--font-stack-sans);
  font-size: var(--font-label-size);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  min-height: 44px;
  transition: border-color var(--motion-duration-standard) var(--motion-easing-mechanical),
              background-color var(--motion-duration-standard) var(--motion-easing-mechanical),
              color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

.action-button-secondary:hover {
  border-color: var(--color-accent);
  background-color: var(--color-hover);
}

.action-button-subtle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: transparent;
  color: var(--color-text-muted);
  border: none;
  font-family: var(--font-stack-mono);
  font-size: var(--font-mono-size);
  text-decoration: none;
  padding: 8px 12px;
  min-height: 44px;
  cursor: pointer;
  transition: color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

.action-button-subtle:hover {
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   THE DOPPELRAND CHASSIS ARCHITECTURE (SIGNATURE MOVE)
   Milled Chassis Frame (16px) encasing Recessed Core Plate (11px)
   -------------------------------------------------------------------------- */
.monolith-frame {
  background-color: var(--color-chassis);
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-chassis);
  padding: clamp(16px, 2.5vw, 24px);
  box-shadow: var(--shadow-chassis);
  transition: border-color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

.monolith-frame:hover {
  border-color: rgba(212, 175, 135, 0.4);
}

.monolith-plate {
  background-color: var(--color-core);
  border: var(--hairline-width) solid rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-core);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow-plate);
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

[data-theme="light"] .monolith-plate {
  border-color: rgba(0, 0, 0, 0.05);
}

/* Telemetry Pip & Badges (Care Detail: strict 5px diameter) */
.telemetry-pip {
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: var(--radius-pill);
  background-color: var(--color-accent);
  flex-shrink: 0;
}

.telemetry-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background-color: var(--color-badge-bg);
  border: var(--hairline-width) solid var(--color-badge-border);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
  font-family: var(--font-stack-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

/* --------------------------------------------------------------------------
   HERO STAGE: MOMENT FIRST
   Calm spacious opening, continuous prose, zero metric counter cards
   -------------------------------------------------------------------------- */
.hero-stage {
  padding-top: clamp(48px, 8vw, 96px);
  padding-bottom: clamp(64px, 10vw, 120px);
  border-bottom: var(--hairline-width) solid var(--color-border);
}

.hero-layout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 980px;
}

.hero-opening-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-eyebrow {
  margin-bottom: var(--space-lg);
}

.hero-title-monument {
  font-family: var(--font-stack-sans);
  font-size: clamp(36px, 5.5vw, var(--font-display-size));
  font-weight: var(--font-display-weight);
  line-height: var(--font-display-line-height);
  letter-spacing: var(--font-display-letter-spacing);
  color: var(--color-text);
  margin-bottom: var(--space-lg);
}

.hero-prose-narrative {
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.6;
  color: var(--color-text-muted);
  max-width: 860px;
  margin-bottom: var(--space-xl);
}

.hero-actions-cluster {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* --------------------------------------------------------------------------
   PRODUCTS & TOOLS SECTION: EMPIRICAL WORKING SOFTWARE
   RunRay Lead Showcase
   -------------------------------------------------------------------------- */
.product-showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-lg);
}

.product-plate-top {
  margin-bottom: var(--space-lg);
}

.product-meta-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: var(--hairline-width) solid var(--color-border);
}

.spec-identifier {
  font-family: var(--font-stack-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-stack-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.product-title-row {
  margin-bottom: var(--space-xs);
}

.product-name {
  font-family: var(--font-stack-sans);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.product-tagline {
  font-family: var(--font-stack-mono);
  font-size: var(--font-mono-size);
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  display: block;
}

.product-summary-text {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.spec-chips-array {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.spec-chip-item {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-chassis);
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-family: var(--font-stack-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

/* --------------------------------------------------------------------------
   CASE DOSSIERS: VERIFIED OUTCOMES (CHALLENGE / ACTION / IMPACT)
   -------------------------------------------------------------------------- */
.dossier-archive-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.dossier-card {
  background-color: var(--color-chassis);
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-chassis);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow-plate);
  transition: border-color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

.dossier-card:hover {
  border-color: rgba(212, 175, 135, 0.4);
}

.dossier-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: var(--hairline-width) solid var(--color-border);
}

.dossier-title-group h3 {
  font-family: var(--font-stack-sans);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.dossier-context-tag {
  font-family: var(--font-stack-mono);
  font-size: 12px;
  color: var(--color-text-muted);
}

.dossier-entity-seal {
  background-color: var(--color-core);
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-family: var(--font-stack-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
}

.dossier-triad-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-lg);
}

.triad-col {
  display: flex;
  flex-direction: column;
}

.triad-col-label {
  font-family: var(--font-stack-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.triad-col-content {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.triad-col.highlight-impact .triad-col-label {
  color: var(--color-accent);
}

.triad-col.highlight-impact .triad-col-content {
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   ENGINEERING PRINCIPLES: FILTERING CONVICTIONS
   -------------------------------------------------------------------------- */
.principles-triad-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-lg);
}

.doctrine-unit {
  background-color: var(--color-chassis);
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-chassis);
  padding: clamp(24px, 3vw, 36px);
  display: flex;
  flex-direction: column;
}

.doctrine-index-tag {
  font-family: var(--font-stack-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}

.doctrine-heading {
  font-family: var(--font-stack-sans);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.doctrine-body-text {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   STEALTH CREDENTIAL CONSOLE: PRIVATE 1-ON-1 EXCHANGE (SIGNATURE MOVE)
   Zero public CV download buttons (D-001)
   -------------------------------------------------------------------------- */
.exchange-console-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-lg);
}

.terminal-bay {
  background-color: var(--color-chassis);
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-chassis);
  padding: clamp(24px, 3.5vw, 40px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-chassis);
}

.terminal-header-tag {
  font-family: var(--font-stack-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}

.terminal-heading {
  font-family: var(--font-stack-sans);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.terminal-summary {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

.terminal-actions-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.terminal-direct-link {
  font-family: var(--font-stack-mono);
  font-size: 13px;
  color: var(--color-text-muted);
  text-decoration: none;
  text-align: center;
  transition: color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

.terminal-direct-link:hover {
  color: var(--color-accent);
}

.stealth-guarantee-note {
  font-family: var(--font-stack-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.4;
}

/* --------------------------------------------------------------------------
   INTERACTIVE STATES & ANNOUNCEMENTS (UI-10, UI-14, UI-16, UI-18, UI-19)
   -------------------------------------------------------------------------- */
.exchange-status-banner {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  background-color: var(--color-core);
  border: var(--hairline-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  font-family: var(--font-stack-mono);
  font-size: 13px;
  color: var(--color-text);
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 220ms ease, transform 220ms var(--motion-easing-mechanical);
}

.exchange-status-banner[data-state="active"] {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.exchange-status-banner[data-status="success"] {
  border-color: var(--color-accent);
}

.exchange-status-banner[data-status="error"] {
  border-color: #E55353;
}

/* --------------------------------------------------------------------------
   FOOTER & COLOPHON
   -------------------------------------------------------------------------- */
.site-colophon {
  background-color: var(--color-bg);
  border-top: var(--hairline-width) solid var(--color-border);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.colophon-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.colophon-legal {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.colophon-copy-notice {
  font-size: 13px;
  color: var(--color-text-muted);
}

.colophon-subtitle-tag {
  font-family: var(--font-stack-mono);
  font-size: 12px;
  color: var(--color-accent);
}

.colophon-anchors {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--space-lg);
}

.colophon-link {
  font-family: var(--font-stack-mono);
  font-size: 13px;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--motion-duration-standard) var(--motion-easing-mechanical);
}

.colophon-link:hover {
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   RESPONSIVE COLLAPSE (UI-34, UI-35)
   Single column below 768px, no horizontal scroll
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .product-showcase-grid,
  .principles-triad-row,
  .exchange-console-split {
    grid-template-columns: minmax(0, 1fr);
  }

  .dossier-triad-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-md);
  }
}

@media (max-width: 768px) {
  .masthead-navigation {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: var(--hairline-width) solid var(--color-border);
    padding: var(--space-lg) var(--container-gutter);
    flex-direction: column;
    align-items: flex-start;
    display: none;
  }

  .masthead-navigation[data-expanded="true"] {
    display: flex;
  }

  .nav-links-list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: var(--space-md);
  }

  .menu-trigger-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .hero-actions-cluster {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .action-button-primary,
  .action-button-secondary {
    width: 100%;
  }

  .dossier-header-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .colophon-grid {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }
}