/* ==========================================================================
   EXOS AQUA — DESIGN SYSTEM & ARCHITECTURAL STYLESHEET
   Primary BG: #0B0F19 | Secondary Surface: #111827 | Accent: #00E5FF
   ========================================================================== */

:root {
  --bg-primary: #0B0F19;
  --bg-secondary: #111827;
  --bg-elevated: #161F33;
  --bg-glass: rgba(17, 24, 39, 0.78);

  --cyan-primary: #00E5FF;
  --cyan-dim: rgba(0, 229, 255, 0.14);
  --cyan-border: rgba(0, 229, 255, 0.32);
  --cyan-glow: 0 0 28px rgba(0, 229, 255, 0.25);

  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-structural: rgba(148, 163, 184, 0.16);

  --danger: #FF4D6D;
  --success: #00E5FF;

  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container-max: 1260px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

::selection {
  background: var(--cyan-primary);
  color: var(--bg-primary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

/* Structural Background Grid & Interactive Node Canvas */
.bg-grid-overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 25%, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.35) 85%);
}

#exos-node-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.65;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 2;
}

/* Utility Typography */
.accent-cyan {
  color: var(--cyan-primary);
}

.text-gradient-cyan {
  background: linear-gradient(135deg, #FFFFFF 0%, #00E5FF 55%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mono-tag,
.mono-label,
.mono-coord,
.mono-id {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.mono-tag {
  color: var(--cyan-primary);
}

.mono-label {
  color: var(--text-muted);
}

.mono-value {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-secondary);
  letter-spacing: 0.06em;
}

.link-cyan {
  color: var(--cyan-primary);
}

.link-cyan:hover {
  text-decoration: underline;
}

/* ==========================================================================
   TOP TELEMETRY BAR & HEADER
   ========================================================================== */
.telemetry-bar {
  background: rgba(11, 15, 25, 0.92);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.45rem 0;
  position: relative;
  z-index: 20;
}

.telemetry-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.telemetry-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--cyan-primary);
  display: inline-block;
  box-shadow: 0 0 10px var(--cyan-primary);
}

.status-dot.pulse {
  animation: cyanPulse 2.2s infinite ease-in-out;
}

@keyframes cyanPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.35);
    opacity: 0.55;
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 25, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header.scrolled {
  border-bottom-color: rgba(0, 229, 255, 0.22);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.logo-mark {
  transition: transform var(--transition-smooth);
}

.brand-logo:hover .logo-mark {
  transform: rotate(15deg) scale(1.04);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.12em;
  line-height: 1.1;
  color: var(--text-primary);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  margin-top: 2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  position: relative;
  padding: 0.35rem 0;
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan-primary);
  margin-right: 0.25rem;
}

.nav-link:hover {
  color: var(--cyan-primary);
}

.nav-link.nav-cta {
  padding: 0.55rem 1.15rem;
  border: 1px solid var(--cyan-border);
  background: rgba(0, 229, 255, 0.08);
  border-radius: var(--radius-sm);
  color: var(--cyan-primary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all var(--transition-fast);
}

.nav-link.nav-cta:hover {
  background: var(--cyan-primary);
  color: var(--bg-primary);
  box-shadow: var(--cyan-glow);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.hamburger-line {
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition-fast);
}

/* ==========================================================================
   1. HERO SECTION
   ========================================================================== */
.hero-section {
  padding: 5.5rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 3.5rem;
  align-items: center;
}

.eyebrow-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  padding: 0.4rem 0.85rem;
  background: rgba(17, 24, 39, 0.9);
  border: 1px solid var(--cyan-border);
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
}

.badge-bracket {
  color: var(--cyan-primary);
  font-weight: 700;
}

.badge-code {
  color: var(--text-secondary);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5vw, 4.35rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin-bottom: 1.4rem;
}

.hero-subheadline {
  font-size: clamp(1.05rem, 1.4vw, 1.22rem);
  color: var(--text-secondary);
  max-width: 620px;
  margin-bottom: 2.25rem;
  font-weight: 400;
  line-height: 1.68;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  padding: 0.95rem 1.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--cyan-primary);
  color: var(--bg-primary);
  box-shadow: 0 0 24px rgba(0, 229, 255, 0.3);
}

.btn-primary:hover {
  background: #33ECFF;
  transform: translateY(-2px);
  box-shadow: 0 0 36px rgba(0, 229, 255, 0.55);
}

.btn-secondary {
  background: rgba(17, 24, 39, 0.85);
  color: var(--text-primary);
  border-color: var(--border-structural);
}

.btn-secondary:hover {
  border-color: var(--cyan-primary);
  color: var(--cyan-primary);
  background: rgba(0, 229, 255, 0.06);
}

/* Key Philosophy Callout Box */
.philosophy-callout {
  position: relative;
  background: linear-gradient(135deg, rgba(17, 24, 39, 0.92) 0%, rgba(11, 15, 25, 0.95) 100%);
  border: 1px solid var(--border-structural);
  border-left: 3px solid var(--cyan-primary);
  padding: 1.4rem 1.6rem;
  border-radius: var(--radius-sm);
  max-width: 630px;
}

.callout-corner {
  position: absolute;
  width: 8px;
  height: 8px;
  border-color: var(--cyan-primary);
  border-style: solid;
  pointer-events: none;
}

.callout-corner.top-left {
  top: -1px;
  left: -1px;
  border-width: 2px 0 0 2px;
}

.callout-corner.top-right {
  top: -1px;
  right: -1px;
  border-width: 2px 2px 0 0;
}

.callout-corner.bottom-left {
  bottom: -1px;
  left: -1px;
  border-width: 0 0 2px 2px;
}

.callout-corner.bottom-right {
  bottom: -1px;
  right: -1px;
  border-width: 0 2px 2px 0;
}

.callout-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.55rem;
  gap: 0.5rem;
}

.mono-coord {
  color: var(--text-muted);
}

.callout-text {
  font-size: 0.98rem;
  color: var(--text-primary);
  font-style: normal;
  line-height: 1.6;
}

/* Hero Exoskeleton Schematic Card */
.exo-schematic-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  position: relative;
}

.exo-schematic-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan-primary), transparent);
}

.schematic-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(11, 15, 25, 0.65);
}

.schematic-status {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--cyan-primary);
  padding: 0.2rem 0.55rem;
  background: var(--cyan-dim);
  border: 1px solid var(--cyan-border);
  border-radius: 3px;
}

.schematic-stage {
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.exo-svg {
  width: 100%;
  max-width: 470px;
  height: auto;
}

.rotate-slow {
  transform-origin: 250px 230px;
  animation: rotateRadar 36s linear infinite;
}

@keyframes rotateRadar {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.node-pulse {
  animation: cyanPulse 2.4s infinite ease-in-out;
  transform-origin: 245px 240px;
}

.schematic-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border-subtle);
  background: rgba(11, 15, 25, 0.7);
}

.metric-cell {
  padding: 0.85rem 1rem;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.metric-cell:last-child {
  border-right: none;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.metric-val {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ==========================================================================
   COMMON SECTION STYLING
   ========================================================================== */
.section {
  padding: 6rem 0;
  position: relative;
  border-top: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 3.5rem;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  color: var(--cyan-primary);
  margin-bottom: 0.75rem;
  display: inline-block;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.6vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 0.9rem;
}

.section-philosophy {
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 720px;
}

.section-subtitle {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 680px;
}

/* ==========================================================================
   2. ABOUT / WHO WE ARE SECTION
   ========================================================================== */
.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin-bottom: 3rem;
}

.proof-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-md);
  padding: 2rem 1.85rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.proof-card:hover {
  transform: translateY(-5px);
  border-color: var(--cyan-border);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45), 0 0 25px rgba(0, 229, 255, 0.08);
}

.card-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.mono-id {
  color: var(--text-muted);
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(0, 229, 255, 0.07);
  border: 1px solid rgba(0, 229, 255, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-display {
  font-family: var(--font-display);
  font-size: 2.65rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
}

.stat-suffix {
  color: var(--cyan-primary);
  font-size: 1.65rem;
}

.proof-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.proof-desc {
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.65;
  margin-bottom: 1.75rem;
  flex-grow: 1;
}

.proof-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

.tag-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
}

/* Highlight Quote Banner */
.highlight-quote-banner {
  background: linear-gradient(120deg, #111827 0%, #0D1526 55%, rgba(0, 229, 255, 0.08) 100%);
  border: 1px solid var(--cyan-border);
  border-radius: var(--radius-md);
  padding: 2.5rem 2.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}

.quote-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--cyan-primary);
  display: block;
  margin-bottom: 0.5rem;
}

.highlight-quote {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.5vw, 2.05rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

.quote-nodes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.mini-node {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 0.45rem 0.8rem;
  background: rgba(11, 15, 25, 0.8);
  border: 1px solid var(--border-structural);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.mini-node::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--cyan-primary);
  border-radius: 50%;
}

/* ==========================================================================
   3. SERVICES & EXPERTISE SECTION
   ========================================================================== */
.services-section {
  background: radial-gradient(circle at 85% 20%, rgba(0, 229, 255, 0.05) 0%, transparent 55%);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.85rem;
}

.service-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.service-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-primary), transparent);
  opacity: 0.35;
  transition: opacity var(--transition-fast);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan-primary);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 229, 255, 0.1);
}

.service-card:hover::after {
  opacity: 1;
}

.service-card-inner {
  padding: 2.25rem;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.35rem;
}

.service-code {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--cyan-primary);
  background: var(--cyan-dim);
  padding: 0.3rem 0.65rem;
  border-radius: 3px;
  border: 1px solid rgba(0, 229, 255, 0.25);
}

.service-hex-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(11, 15, 25, 0.75);
  border: 1px solid var(--border-structural);
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
}

.service-description {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.service-specs {
  margin-bottom: 1.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex-grow: 1;
}

.service-specs li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.spec-dot {
  width: 6px;
  height: 6px;
  background: var(--cyan-primary);
  margin-top: 0.5rem;
  flex-shrink: 0;
  transform: rotate(45deg);
}

.service-footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.species-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.07em;
  color: var(--text-secondary);
  background: rgba(11, 15, 25, 0.85);
  border: 1px solid var(--border-subtle);
  padding: 0.28rem 0.6rem;
  border-radius: 3px;
}

.service-select-btn {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--cyan-primary);
  font-weight: 600;
  transition: transform var(--transition-fast);
}

.service-select-btn:hover {
  transform: translateX(4px);
  text-decoration: underline;
}

/* ==========================================================================
   INTERACTIVE SYSTEM TELEMETRY SIMULATOR
   ========================================================================== */
.telemetry-section {
  padding: 4.5rem 0;
}

.telemetry-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

.telemetry-panel-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.85rem;
}

.telemetry-panel-title {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
}

.mode-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  background: var(--bg-primary);
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.mode-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.55rem 0.95rem;
  border-radius: 3px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mode-btn:hover {
  color: var(--text-primary);
}

.mode-btn.active {
  background: var(--cyan-dim);
  color: var(--cyan-primary);
  border-color: var(--cyan-border);
}

.telemetry-readouts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.readout-box {
  background: rgba(11, 15, 25, 0.75);
  border: 1px solid var(--border-subtle);
  padding: 1.2rem;
  border-radius: var(--radius-sm);
}

.readout-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.45rem;
}

.readout-value {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.75rem;
}

.readout-bar {
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
}

.readout-fill {
  height: 100%;
  background: var(--cyan-primary);
  box-shadow: 0 0 10px var(--cyan-primary);
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.telemetry-note-box {
  background: rgba(11, 15, 25, 0.55);
  border-left: 3px solid var(--cyan-primary);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.telemetry-note-box p {
  color: var(--text-secondary);
  font-size: 0.94rem;
}

/* ==========================================================================
   4. CONTACT & CONSULTING INQUIRY FORM
   ========================================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 3.5rem;
  align-items: start;
}

.contact-lead {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2.25rem;
  line-height: 1.65;
}

.protocol-steps {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
  margin-bottom: 2.25rem;
}

.protocol-step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: rgba(17, 24, 39, 0.6);
  border: 1px solid var(--border-subtle);
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius-sm);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--cyan-primary);
  background: var(--cyan-dim);
  border: 1px solid var(--cyan-border);
  padding: 0.25rem 0.55rem;
  border-radius: 3px;
}

.protocol-step h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.protocol-step p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.direct-comms-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.comms-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px dashed var(--border-subtle);
  padding-bottom: 0.5rem;
}

.comms-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* Form Wrapper */
.contact-form-wrapper {
  background: var(--bg-secondary);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.form-terminal-bar {
  background: rgba(11, 15, 25, 0.9);
  padding: 0.85rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.3);
}

.terminal-dots span:first-child {
  background: var(--cyan-primary);
}

.consulting-form {
  padding: 2rem 1.85rem;
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.form-row.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.15rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.checkbox-fieldset {
  border: none;
}

.form-label {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.label-hint {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.req {
  color: var(--cyan-primary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-sm);
  padding: 0.8rem 0.95rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.94rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: rgba(148, 163, 184, 0.5);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--cyan-primary);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.14);
}

.form-input.invalid,
.form-select.invalid {
  border-color: var(--danger);
}

.input-with-status {
  position: relative;
}

.email-status-badge {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  padding: 0.18rem 0.45rem;
  border-radius: 3px;
  background: var(--cyan-dim);
  color: var(--cyan-primary);
  border: 1px solid var(--cyan-border);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.email-status-badge.visible {
  opacity: 1;
}

/* Checkboxes Grid */
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-top: 0.35rem;
}

.checkbox-card {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 0.9rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-structural);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.checkbox-card:hover {
  border-color: rgba(0, 229, 255, 0.5);
}

.checkbox-card input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.checkbox-box {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--text-muted);
  border-radius: 3px;
  margin-top: 2px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.checkbox-card input[type="checkbox"]:checked ~ .checkbox-box {
  background: var(--cyan-primary);
  border-color: var(--cyan-primary);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
}

.checkbox-card input[type="checkbox"]:checked ~ .checkbox-box::after {
  content: "";
  width: 5px;
  height: 9px;
  border: solid var(--bg-primary);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

.checkbox-card:has(input[type="checkbox"]:checked) {
  border-color: var(--cyan-primary);
  background: rgba(0, 229, 255, 0.06);
}

.checkbox-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.checkbox-text strong {
  font-family: var(--font-display);
  font-size: 0.86rem;
  color: var(--text-primary);
}

.checkbox-text small {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.35;
}

.field-error {
  font-size: 0.76rem;
  color: var(--danger);
  display: none;
}

.field-error.visible {
  display: block;
}

/* Submit Button in Electric Cyan */
.btn-submit-cyan {
  width: 100%;
  background: var(--cyan-primary);
  color: var(--bg-primary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 1.05rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 25px rgba(0, 229, 255, 0.35);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-submit-cyan:hover {
  background: #33ECFF;
  box-shadow: 0 0 38px rgba(0, 229, 255, 0.6);
  transform: translateY(-1px);
}

/* Submission Receipt */
.submission-receipt {
  background: rgba(11, 15, 25, 0.92);
  border: 1px solid var(--cyan-primary);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  margin-top: 0.5rem;
}

.receipt-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan-primary);
  margin-bottom: 0.75rem;
}

.receipt-message {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.receipt-summary {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.btn-reset-form {
  background: transparent;
  border: 1px solid var(--cyan-border);
  color: var(--cyan-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.5rem 0.95rem;
  border-radius: 3px;
  cursor: pointer;
}

.btn-reset-form:hover {
  background: var(--cyan-dim);
}

/* ==========================================================================
   5. FOOTER
   ========================================================================== */
.site-footer {
  background: #070A12;
  border-top: 1px solid var(--border-structural);
  padding: 4rem 0 2.5rem;
  position: relative;
  z-index: 2;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border-subtle);
}

.footer-tagline {
  margin-top: 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 320px;
}

.footer-links-col {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.footer-links-col a:hover {
  color: var(--cyan-primary);
}

.footer-domain-link {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cyan-primary);
}

.footer-bottom {
  padding-top: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-domain-tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

.footer-domain-tag a {
  color: var(--cyan-primary);
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .proof-grid {
    grid-template-columns: 1fr;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .telemetry-readouts {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hide-mobile {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: rgba(11, 15, 25, 0.98);
    border-bottom: 1px solid var(--cyan-border);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 1.1rem;
    display: none;
  }

  .main-nav.open {
    display: flex;
  }

  .form-row.two-col,
  .checkbox-grid,
  .telemetry-readouts,
  .footer-top {
    grid-template-columns: 1fr;
  }

  .schematic-metrics {
    grid-template-columns: 1fr;
  }

  .metric-cell {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
}