/* =========================================================
   FIXED NAVIGATION
========================================================= */
.site-header {
  position: fixed;
  top: 0.85rem;
  left: 50%;
  z-index: 90;
  display: grid;
  width: min(94rem, calc(100% - 1.5rem));
  min-height: var(--header-height);
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-5);
  padding: 0.65rem 0.8rem 0.65rem 0.65rem;
  transform: translateX(-50%);
  border: var(--border);
  border-radius: var(--radius-medium);
  background: var(--header-overlay);
  box-shadow: var(--shadow-small);
  backdrop-filter: blur(18px) saturate(125%);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-monogram {
  display: grid;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  border: 1px solid rgba(var(--electric-blue-rgb), 0.42);
  border-radius: var(--radius-small);
  background: linear-gradient(145deg, rgba(var(--electric-blue-rgb), 0.16), rgba(var(--surface-rgb), 0.45));
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.brand-signal {
  position: relative;
  width: 1.1rem;
  height: 1.1rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}

.brand-signal::before,
.brand-signal::after {
  position: absolute;
  inset: 50% auto auto 50%;
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%);
}

.brand-signal::before {
  width: 0.35rem;
  height: 0.35rem;
  background: var(--electric-blue);
  box-shadow: 0 0 10px rgba(var(--electric-blue-rgb), 0.8);
}

.brand-signal::after {
  width: 1.7rem;
  height: 1.7rem;
  border: 1px solid var(--line);
}

.desktop-nav {
  display: flex;
  justify-content: center;
  gap: 0.2rem;
}

.nav-link {
  position: relative;
  padding: 0.75rem 0.9rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: color var(--duration-fast) ease;
}

.nav-link::after {
  position: absolute;
  right: 0.9rem;
  bottom: 0.45rem;
  left: 0.9rem;
  height: 1px;
  content: "";
  background: var(--electric-blue);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--duration-medium) var(--ease-standard);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--text-primary);
}

.nav-link.is-active::after {
  transform: scaleX(1);
  transform-origin: left center;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.55rem;
  border: var(--border);
  border-radius: var(--radius-small);
  color: var(--text-secondary);
}

.theme-toggle__track {
  position: relative;
  width: 2rem;
  height: 1.05rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface-secondary);
}

.theme-toggle__thumb {
  position: absolute;
  top: 50%;
  left: 0.18rem;
  width: 0.62rem;
  height: 0.62rem;
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--electric-blue);
  box-shadow: 0 0 10px rgba(var(--electric-blue-rgb), 0.55);
  transition: left var(--duration-medium) var(--ease-standard);
}

html[data-theme="light"] .theme-toggle__thumb {
  left: 1rem;
}

.theme-toggle__label {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.menu-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.7rem;
  border: var(--border);
  border-radius: var(--radius-small);
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 1px;
  margin-block: 0.3rem;
  background: var(--text-primary);
  transition: transform var(--duration-medium) var(--ease-standard);
}

.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(0.31rem) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-0.31rem) rotate(-45deg);
}

.mobile-navigation {
  position: absolute;
  top: calc(100% + 0.65rem);
  right: 0;
  left: 0;
  padding: 1rem;
  border: var(--border-strong);
  border-radius: var(--radius-medium);
  background: var(--surface);
  box-shadow: var(--shadow-medium);
}

.mobile-navigation nav {
  display: grid;
}

.mobile-navigation nav a {
  display: flex;
  min-height: 3.1rem;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line-faint);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
}

.mobile-navigation nav a::after {
  color: var(--electric-blue);
  content: "↘";
  font-family: var(--font-mono);
}

.mobile-navigation__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 1rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.mobile-navigation__meta a {
  color: var(--electric-blue);
}

/* =========================================================
   IDENTITY LAYER
========================================================= */
.identity-layer {
  display: grid;
  min-height: 100svh;
  align-content: center;
  padding-top: calc(var(--header-height) + var(--space-8));
  padding-bottom: var(--space-7);
}

.identity-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(31rem, 0.96fr);
  align-items: center;
  gap: clamp(2.5rem, 6vw, 8rem);
}

.identity-copy h1 {
  margin-left: -0.055em;
  font-size: var(--step-5);
  line-height: 0.78;
  letter-spacing: -0.075em;
  text-transform: uppercase;
}

.identity-copy h1 span {
  display: block;
}

.identity-copy h1 span:last-child {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--text-primary);
}

.identity-role {
  margin-top: var(--space-5);
  color: var(--electric-blue);
  font-family: var(--font-heading);
  font-size: var(--step-2);
  font-weight: 600;
  letter-spacing: -0.025em;
}

.identity-statement {
  max-width: 41rem;
  margin-top: var(--space-4);
  color: var(--text-primary);
  font-size: var(--step-1);
  line-height: 1.55;
}

.identity-stack {
  margin-top: var(--space-4);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
}

.identity-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
  margin-top: var(--space-6);
}

.identity-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-top: var(--space-6);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.identity-links a {
  position: relative;
  color: var(--text-secondary);
}

.identity-links a::after {
  position: absolute;
  right: 0;
  bottom: -0.2rem;
  left: 0;
  height: 1px;
  content: "";
  background: var(--electric-blue);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-fast) ease;
}

.identity-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.identity-topology {
  position: relative;
  width: min(100%, 43rem);
  aspect-ratio: 1;
  justify-self: end;
  transform-style: preserve-3d;
}

.identity-topology__lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.identity-topology__lines path,
.identity-topology__lines circle {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.4;
  vector-effect: non-scaling-stroke;
}

.identity-topology__lines path {
  stroke-dasharray: 5 9;
}

.identity-topology__lines path.is-active {
  stroke: var(--electric-blue);
  stroke-width: 2;
  filter: drop-shadow(0 0 5px rgba(var(--electric-blue-rgb), 0.45));
}

.identity-topology__lines circle:first-of-type {
  stroke-dasharray: 3 11;
}

.identity-topology__lines circle:last-of-type {
  opacity: 0.5;
  stroke-dasharray: 1 14;
}

.identity-core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 13.6rem;
  aspect-ratio: 1;
  place-content: center;
  padding: 1.3rem;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(var(--electric-blue-rgb), 0.42);
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(var(--electric-blue-rgb), 0.12), transparent 67%),
    var(--panel-overlay);
  box-shadow: 0 0 0 1.8rem rgba(var(--electric-blue-rgb), 0.025), var(--shadow-blue);
  text-align: center;
}

.identity-core::before,
.identity-core::after {
  position: absolute;
  inset: 50% auto auto 50%;
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.identity-core::before {
  width: calc(100% + 3.4rem);
  height: calc(100% + 3.4rem);
  border: 1px solid var(--line);
  border-right-color: var(--electric-blue);
}

.identity-core::after {
  width: 0.48rem;
  height: 0.48rem;
  background: var(--electric-blue);
  box-shadow: 0 0 15px rgba(var(--electric-blue-rgb), 0.85);
}

.identity-core strong {
  margin-block: 0.75rem 0.4rem;
  font-family: var(--font-heading);
  font-size: 1.45rem;
  line-height: 1.05;
}

.identity-core small {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.65rem;
}

.orbit-node {
  position: absolute;
  display: grid;
  width: 9.5rem;
  min-height: 6.4rem;
  align-content: center;
  padding: 0.8rem 1rem;
  border: var(--border);
  border-radius: var(--radius-small);
  background: rgba(var(--surface-rgb), 0.72);
  box-shadow: var(--shadow-small);
  text-align: left;
  backdrop-filter: blur(10px);
  transition:
    transform var(--duration-medium) var(--ease-standard),
    border-color var(--duration-fast) ease,
    background-color var(--duration-fast) ease;
}

.orbit-node:hover,
.orbit-node.is-active {
  z-index: 2;
  border-color: var(--electric-blue);
  background: rgba(var(--electric-blue-rgb), 0.1);
  transform: translateY(-4px);
}

.orbit-node span,
.orbit-node small {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.orbit-node strong {
  margin-block: 0.25rem;
  font-family: var(--font-heading);
  font-size: 1.15rem;
}

.orbit-node--ai {
  top: 4%;
  left: 1%;
}

.orbit-node--telecom {
  top: 6%;
  right: 0;
}

.orbit-node--rf {
  bottom: 4%;
  left: 1%;
}

.orbit-node--software {
  right: 0;
  bottom: 4%;
}

.topology-status {
  position: absolute;
  bottom: 0;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.8rem;
  transform: translateX(-50%);
  border: var(--border);
  border-radius: var(--radius-small);
  background: var(--surface);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  white-space: nowrap;
}

.continue-indicator {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  width: max-content;
  margin-top: var(--space-5);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.continue-indicator i {
  position: relative;
  display: block;
  width: 5rem;
  height: 1px;
  overflow: hidden;
  background: var(--line-strong);
}

.continue-indicator i::after {
  position: absolute;
  inset: 0;
  content: "";
  background: var(--electric-blue);
  transform: translateX(-100%);
}

/* =========================================================
   NETWORK INTELLIGENCE DOMAIN MAP
========================================================= */
.intelligence-layer {
  min-height: 105vh;
}

.intelligence-interface {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(20rem, 0.55fr);
  gap: var(--space-6);
  align-items: stretch;
}

.domain-map {
  position: relative;
  min-height: 43rem;
  overflow: hidden;
  border: var(--border);
  background:
    linear-gradient(90deg, transparent 49.85%, var(--line-faint) 50%, transparent 50.15%),
    linear-gradient(transparent 49.85%, var(--line-faint) 50%, transparent 50.15%),
    rgba(var(--surface-rgb), 0.66);
  box-shadow: var(--shadow-medium);
}

.domain-map::before,
.domain-map::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.domain-map::before {
  inset: 1rem;
  border: 1px solid var(--line-faint);
}

.domain-map::after {
  right: 1.25rem;
  bottom: 1.25rem;
  width: 4.5rem;
  height: 4.5rem;
  border-right: 1px solid var(--electric-blue);
  border-bottom: 1px solid var(--electric-blue);
}

.domain-map__connections {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.domain-map__connections path {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1.2;
  stroke-dasharray: 5 7;
  vector-effect: non-scaling-stroke;
  transition:
    stroke var(--duration-medium) ease,
    opacity var(--duration-medium) ease;
}

.domain-map__connections path.is-active {
  stroke: var(--electric-blue);
  stroke-width: 2;
  filter: drop-shadow(0 0 6px rgba(var(--electric-blue-rgb), 0.55));
}

.domain-core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 14rem;
  aspect-ratio: 1;
  place-content: center;
  padding: 1.5rem;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(var(--electric-blue-rgb), 0.5);
  border-radius: 50%;
  background: var(--surface);
  text-align: center;
}

.domain-core::after {
  position: absolute;
  inset: -1.3rem;
  border: 1px dashed var(--line-strong);
  border-radius: 50%;
  content: "";
}

.domain-core strong {
  margin-block: 0.7rem;
  font-family: var(--font-heading);
  font-size: 1.55rem;
  line-height: 1.05;
}

.domain-core p {
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.domain-node {
  position: absolute;
  display: grid;
  width: 11rem;
  min-height: 5.6rem;
  align-content: center;
  padding: 0.9rem 1rem;
  border: var(--border);
  border-radius: var(--radius-small);
  background: var(--surface-secondary);
  box-shadow: var(--shadow-small);
  text-align: left;
  transition:
    transform var(--duration-medium) var(--ease-standard),
    border-color var(--duration-fast) ease,
    background-color var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease;
}

.domain-node span {
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.11em;
}

.domain-node strong {
  margin-top: 0.25rem;
  font-family: var(--font-heading);
  font-size: 0.96rem;
}

.domain-node:hover,
.domain-node.is-active {
  z-index: 2;
  transform: translateY(-4px);
  border-color: var(--electric-blue);
  background: color-mix(in srgb, var(--surface-secondary) 78%, var(--blue));
  box-shadow: var(--shadow-blue);
}

.domain-node--data {
  top: 8%;
  left: 5%;
}

.domain-node--intelligence {
  top: 8%;
  right: 5%;
}

.domain-node--networks {
  top: 50%;
  right: 2.5%;
  transform: translateY(-50%);
}

.domain-node--networks:hover,
.domain-node--networks.is-active {
  transform: translateY(calc(-50% - 4px));
}

.domain-node--physical {
  bottom: 8%;
  left: 5%;
}

.domain-node--software {
  right: 5%;
  bottom: 8%;
}

.domain-readout {
  display: flex;
  min-height: 43rem;
  flex-direction: column;
  padding: var(--space-6);
  border-top: 2px solid var(--electric-blue);
  border-right: var(--border);
  border-bottom: var(--border);
  border-left: var(--border);
  background: var(--panel-overlay);
  box-shadow: var(--shadow-medium);
}

.domain-readout__header,
.system-display__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.domain-readout h3 {
  margin-top: auto;
  font-size: var(--step-3);
}

.domain-readout > p {
  margin-top: var(--space-4);
  color: var(--text-primary);
  font-size: 1.08rem;
}

.domain-readout__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: var(--space-5);
}

.domain-readout__tags span,
.system-tool-grid span,
.interface-functions span,
.architecture-notes span {
  padding: 0.55rem 0.7rem;
  border: var(--border);
  border-radius: var(--radius-small);
  background: rgba(var(--electric-blue-rgb), 0.055);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.domain-readout__connection {
  margin-top: auto;
  padding-top: var(--space-5);
  border-top: 1px solid var(--line);
}

.domain-readout__connection span {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.domain-readout__connection strong {
  color: var(--electric-blue);
  font-size: 0.92rem;
}

/* =========================================================
   NETSIGHT AI FEATURED SYSTEM
========================================================= */
.netsight-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(25rem, 1fr);
  gap: var(--space-8);
  align-items: end;
  margin-bottom: var(--space-8);
}

.netsight-intro h2 {
  font-size: clamp(4.5rem, 10vw, 10rem);
  line-height: 0.82;
  letter-spacing: -0.075em;
}

.netsight-subtitle {
  max-width: 38rem;
  margin-top: var(--space-4);
  color: var(--electric-blue);
  font-family: var(--font-heading);
  font-size: var(--step-2);
  font-weight: 600;
  line-height: 1.2;
}

.netsight-intro__summary > p {
  max-width: 48rem;
  margin-bottom: var(--space-5);
  color: var(--text-primary);
  font-size: var(--step-1);
}

.netsight-walkthrough {
  display: grid;
  grid-template-columns: minmax(25rem, 0.75fr) minmax(0, 1.25fr);
  gap: var(--space-7);
  align-items: start;
}

.netsight-map-wrap {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
}

.netsight-map {
  min-height: calc(100svh - var(--header-height) - 3rem);
  padding: var(--space-5);
  border: var(--border);
  background:
    linear-gradient(135deg, rgba(var(--electric-blue-rgb), 0.08), transparent 45%),
    var(--panel-overlay);
  box-shadow: var(--shadow-medium);
}

.netsight-map__header {
  display: flex;
  justify-content: space-between;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.pipeline {
  display: grid;
  max-width: 32rem;
  margin: var(--space-6) auto;
}

.pipeline-node {
  display: grid;
  width: 100%;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 1rem;
  min-height: 4.4rem;
  padding: 0.75rem;
  border: var(--border);
  border-radius: var(--radius-small);
  background: var(--surface-secondary);
  text-align: left;
  transition:
    border-color var(--duration-medium) ease,
    background-color var(--duration-medium) ease,
    opacity var(--duration-medium) ease,
    transform var(--duration-medium) var(--ease-standard);
}

.pipeline-node:not(.is-active):not(.is-complete) {
  opacity: 0.52;
}

.pipeline-node.is-active {
  transform: translateX(0.4rem);
  border-color: var(--electric-blue);
  background: rgba(var(--electric-blue-rgb), 0.12);
  box-shadow: var(--shadow-blue);
}

.pipeline-node.is-complete {
  border-color: rgba(85, 214, 167, 0.38);
}

.pipeline-node__index {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.65rem;
}

.pipeline-node strong,
.pipeline-node small {
  display: block;
}

.pipeline-node strong {
  font-family: var(--font-heading);
  font-size: 0.95rem;
}

.pipeline-node small {
  margin-top: 0.1rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.61rem;
}

.pipeline-link {
  position: relative;
  display: block;
  width: 1px;
  height: 2.1rem;
  margin-inline: 2rem;
  overflow: hidden;
  background: var(--line-strong);
}

.pipeline-link i {
  position: absolute;
  inset: 0;
  display: block;
  background: var(--electric-blue);
  transform: translateY(-100%);
}

.pipeline-link.is-complete i {
  transform: translateY(0);
}

.pipeline-readout {
  margin-top: auto;
  padding: var(--space-4);
  border-left: 2px solid var(--electric-blue);
  background: rgba(var(--electric-blue-rgb), 0.06);
}

.pipeline-readout strong {
  display: block;
  margin-block: 0.35rem 0.2rem;
  font-family: var(--font-heading);
  font-size: 1.05rem;
}

.pipeline-readout p {
  font-size: 0.85rem;
}

.stage-sequence {
  display: grid;
  gap: 25vh;
  padding-block: 8vh 25vh;
}

.stage-panel {
  position: relative;
  min-height: 70vh;
  padding: clamp(1.5rem, 3vw, 3rem);
  border: var(--border);
  background: rgba(var(--surface-rgb), 0.7);
  box-shadow: var(--shadow-small);
  opacity: 0.56;
  transition:
    opacity var(--duration-slow) ease,
    border-color var(--duration-slow) ease,
    transform var(--duration-slow) var(--ease-standard),
    background-color var(--duration-slow) ease;
}

.stage-panel::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  content: "";
  background: var(--electric-blue);
  transition: width var(--duration-slow) var(--ease-standard);
}

.stage-panel.is-active {
  transform: translateX(-0.7rem);
  border-color: var(--line-strong);
  background: var(--surface);
  box-shadow: var(--shadow-medium);
  opacity: 1;
}

.stage-panel.is-active::before {
  width: 100%;
}

.stage-panel__number {
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.stage-panel h3 {
  margin-top: var(--space-4);
  font-size: var(--step-3);
}

.stage-panel > p {
  max-width: 50rem;
  margin-top: var(--space-4);
  color: var(--text-primary);
  font-size: 1.06rem;
}

.signal-list {
  display: grid;
  gap: 0.65rem;
  margin-top: var(--space-5);
  list-style: none;
}

.signal-list li {
  position: relative;
  padding: 0.8rem 0.9rem 0.8rem 2.3rem;
  border-bottom: 1px solid var(--line-faint);
  color: var(--text-secondary);
}

.signal-list li::before {
  position: absolute;
  top: 1.2rem;
  left: 0.9rem;
  width: 0.45rem;
  height: 0.45rem;
  border: 1px solid var(--electric-blue);
  content: "";
  transform: rotate(45deg);
}

.signal-list--compact {
  grid-template-columns: repeat(3, 1fr);
}

.signal-list--compact li {
  padding: 0.9rem;
  border: var(--border);
}

.signal-list--compact li::before {
  display: none;
}

.stage-visual {
  position: relative;
  height: 15rem;
  margin-top: var(--space-6);
  overflow: hidden;
  border: var(--border);
  background:
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px),
    rgba(var(--electric-blue-rgb), 0.035);
  background-size: 32px 32px;
}

.cell-tower {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  width: 3px;
  height: 8rem;
  transform: translateX(-50%);
  background: var(--text-secondary);
}

.cell-tower::before,
.cell-tower::after {
  position: absolute;
  left: 50%;
  content: "";
  transform: translateX(-50%);
}

.cell-tower::before {
  top: -0.8rem;
  width: 1.2rem;
  height: 1.2rem;
  border: 2px solid var(--electric-blue);
  border-radius: 50%;
  background: var(--surface);
}

.cell-tower::after {
  bottom: 0;
  width: 5rem;
  height: 1px;
  background: var(--text-secondary);
  box-shadow: -1.7rem -2.5rem 0 -0.2rem var(--text-secondary), 1.7rem -2.5rem 0 -0.2rem var(--text-secondary);
}

.wave {
  position: absolute;
  top: 1.55rem;
  left: 50%;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transform: translateX(-50%);
}

.wave--one {
  width: 8rem;
  height: 8rem;
}

.wave--two {
  width: 13rem;
  height: 13rem;
}

.packet {
  position: absolute;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--electric-blue);
  box-shadow: 0 0 12px rgba(var(--electric-blue-rgb), 0.7);
}

.packet--a { top: 25%; left: 20%; }
.packet--b { top: 58%; right: 16%; }
.packet--c { top: 19%; right: 28%; }

.kpi-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin-top: var(--space-6);
  border-top: var(--border);
  border-left: var(--border);
}

.kpi-strip span {
  min-height: 6.2rem;
  padding: 0.8rem;
  border-right: var(--border);
  border-bottom: var(--border);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 0.82rem;
}

.kpi-strip small {
  display: block;
  margin-bottom: 1rem;
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stage-waveform {
  height: 12rem;
  margin-top: var(--space-5);
  overflow: hidden;
  border: var(--border);
  background:
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px);
  background-size: 40px 40px;
}

.stage-waveform svg {
  width: 100%;
  height: 100%;
}

.stage-waveform path {
  fill: none;
  stroke: var(--electric-blue);
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 0 5px rgba(var(--electric-blue-rgb), 0.4));
}

.technology-chain {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: var(--space-6);
}

.technology-chain span {
  flex: 1;
  padding: 1.2rem 0.7rem;
  border: var(--border);
  background: var(--surface-secondary);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-align: center;
}

.technology-chain i {
  position: relative;
  width: 1.8rem;
  height: 1px;
  flex: 0 0 auto;
  background: var(--line-strong);
}

.technology-chain i::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 0.35rem;
  height: 0.35rem;
  content: "";
  transform: translateY(-50%) rotate(45deg);
  border-top: 1px solid var(--electric-blue);
  border-right: 1px solid var(--electric-blue);
}

.diagnostic-logic {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-top: var(--space-6);
  padding: var(--space-4);
  border: var(--border);
  background: var(--surface-secondary);
}

.diagnostic-logic span,
.diagnostic-logic strong {
  padding: 0.7rem 0.85rem;
  border: var(--border);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.diagnostic-logic strong {
  border-color: var(--electric-blue);
  color: var(--electric-blue);
}

.diagnostic-logic b {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.interface-functions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-top: var(--space-6);
}

.interface-functions span {
  min-height: 4rem;
  display: flex;
  align-items: center;
}

.stage-outcome {
  margin-top: var(--space-6) !important;
  padding: var(--space-4);
  border-left: 3px solid var(--green);
  background: rgba(85, 214, 167, 0.06);
}

.stage-outcome span {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.architecture-view {
  position: fixed;
  inset: 1rem;
  z-index: 120;
  overflow: auto;
  padding: clamp(1rem, 3vw, 2.5rem);
  border: 1px solid var(--electric-blue);
  background: rgba(var(--background-rgb), 0.97);
  box-shadow: 0 0 0 100vmax rgba(0, 0, 0, 0.76), var(--shadow-medium);
}

.architecture-view__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--line);
}

.architecture-view__toolbar h3 {
  margin-top: 0.3rem;
}

.icon-button {
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  border: var(--border-strong);
  border-radius: var(--radius-small);
  background: var(--surface-secondary);
  color: var(--text-primary);
  font-size: 1.8rem;
  line-height: 1;
}

.architecture-grid {
  display: grid;
  min-width: 68rem;
  grid-template-columns: repeat(4, minmax(2.5rem, 0.18fr) minmax(11rem, 1fr)) minmax(11rem, 1fr);
  align-items: center;
  gap: 0.75rem;
  margin-top: var(--space-7);
}

.architecture-lane__label {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-align: center;
}

.architecture-module {
  display: grid;
  min-height: 17rem;
  align-content: start;
  gap: 0.6rem;
  padding: 1.25rem;
  border: var(--border-strong);
  background: var(--surface);
}

.architecture-module--accent {
  border-color: var(--electric-blue);
  box-shadow: var(--shadow-blue);
}

.architecture-module small {
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.architecture-module strong {
  margin-bottom: 1.1rem;
  font-family: var(--font-heading);
  font-size: 1.05rem;
}

.architecture-module span {
  padding-top: 0.55rem;
  border-top: 1px solid var(--line-faint);
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.architecture-transfer {
  position: relative;
  height: 1px;
  overflow: hidden;
  background: var(--line-strong);
}

.architecture-transfer::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 0.45rem;
  height: 0.45rem;
  content: "";
  transform: translateY(-50%) rotate(45deg);
  border-top: 1px solid var(--electric-blue);
  border-right: 1px solid var(--electric-blue);
}

.architecture-transfer span {
  position: absolute;
  inset: 0;
  background: var(--electric-blue);
}

.architecture-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: var(--space-7);
}

.netsight-evidence {
  padding-top: var(--space-10);
}

.evidence-heading {
  display: grid;
  grid-template-columns: 1fr minmax(20rem, 0.65fr);
  align-items: end;
  gap: var(--space-7);
  margin-bottom: var(--space-5);
}

.evidence-heading > p {
  max-width: 40rem;
}

.evidence-track {
  display: grid;
  grid-auto-columns: minmax(32rem, 60vw);
  grid-auto-flow: column;
  gap: var(--space-4);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  padding: 0.25rem 0 var(--space-4);
  scroll-snap-type: inline mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

.evidence-frame {
  position: relative;
  overflow: hidden;
  border: var(--border);
  background: var(--surface);
  scroll-snap-align: start;
}

.evidence-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top left;
  filter: saturate(0.9) contrast(1.03);
  transition: transform var(--duration-slow) var(--ease-standard);
}

.evidence-frame--document img {
  object-fit: contain;
  background: #222;
}

.evidence-frame:hover img {
  transform: scale(1.018);
}

.evidence-frame figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.evidence-frame figcaption span {
  color: var(--electric-blue);
}

/* =========================================================
   ENGINEERING CASE FILES
========================================================= */
.project-controls {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  padding: 0.8rem 1rem;
  border-top: var(--border);
  border-bottom: var(--border);
}

.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter-button {
  min-height: 2.4rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  color: var(--text-secondary);
  font-size: 0.76rem;
  transition:
    color var(--duration-fast) ease,
    border-color var(--duration-fast) ease,
    background-color var(--duration-fast) ease;
}

.filter-button:hover,
.filter-button.is-active {
  border-color: var(--line-strong);
  background: rgba(var(--electric-blue-rgb), 0.08);
  color: var(--text-primary);
}

.filter-button.is-active {
  border-color: var(--electric-blue);
}

.project-count {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  white-space: nowrap;
}

.project-count strong {
  color: var(--electric-blue);
}

.case-files {
  border-top: 1px solid var(--line-strong);
}

.case-file {
  border-bottom: 1px solid var(--line-strong);
  background: rgba(var(--surface-rgb), 0.25);
  transition:
    background-color var(--duration-medium) ease,
    opacity var(--duration-medium) ease,
    border-color var(--duration-medium) ease;
}

.case-file:hover,
.case-file.is-open,
.case-file.is-related {
  background: rgba(var(--surface-rgb), 0.76);
}

.case-file.is-related {
  border-left: 2px solid var(--electric-blue);
}

.case-file.is-filtered {
  display: none;
}

.case-file__summary {
  display: grid;
  grid-template-columns: 8rem minmax(18rem, 1.25fr) minmax(15rem, 0.85fr) minmax(12rem, 0.65fr);
  grid-template-areas:
    "number identity problem visual"
    "number identity problem toggle";
  align-items: center;
  gap: var(--space-5);
  min-height: 18rem;
  padding: var(--space-5) 0;
}

.case-file__number {
  grid-area: number;
  align-self: start;
  padding-top: 0.4rem;
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.case-file__identity {
  grid-area: identity;
}

.case-file__category {
  margin-bottom: 0.55rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-file__identity h3 {
  max-width: 22ch;
  font-size: var(--step-2);
}

.case-file__identity > p:last-child {
  max-width: 38rem;
  margin-top: var(--space-3);
}

.case-file__problem {
  grid-area: problem;
  align-self: center;
  padding-left: var(--space-4);
  border-left: 1px solid var(--line);
}

.case-file__problem span,
.case-detail-block > span,
.system-projects > span {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-file__problem p {
  font-size: 0.85rem;
}

.case-file__visual {
  position: relative;
  grid-area: visual;
  height: 8rem;
  overflow: hidden;
  border: var(--border);
  background:
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px),
    rgba(var(--electric-blue-rgb), 0.035);
  background-size: 24px 24px;
}

.case-file__toggle {
  grid-area: toggle;
  align-self: end;
  display: flex;
  min-height: 2.8rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0;
  border: 0;
  border-top: 1px solid var(--line);
  background: none;
  color: var(--text-primary);
  font-size: 0.78rem;
  font-weight: 700;
  text-align: left;
}

.case-file__toggle span {
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  transition: transform var(--duration-medium) var(--ease-standard);
}

.case-file.is-open .case-file__toggle span {
  transform: rotate(45deg);
}

.case-file__details {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-bottom: var(--space-5);
  border: 1px solid var(--line);
  background: var(--line);
}

.case-detail-block {
  min-height: 15rem;
  padding: var(--space-4);
  background: var(--surface);
}

.case-detail-block p,
.case-detail-block li {
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.case-detail-block ul {
  display: grid;
  gap: 0.55rem;
  padding-left: 1rem;
}

.case-detail-block--tools div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.case-detail-block--tools b {
  padding: 0.48rem 0.6rem;
  border: var(--border);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
}


/* Research article file */
.case-file--publication {
  background:
    linear-gradient(90deg, rgba(var(--electric-blue-rgb), 0.055), transparent 30%),
    rgba(var(--surface-rgb), 0.32);
}

.case-file--publication .case-file__number {
  color: var(--green);
}

.case-file--publication .case-file__identity h3 {
  max-width: 31ch;
}

.case-file--publication.is-open,
.case-file--publication:hover,
.case-file--publication.is-related {
  border-color: rgba(var(--electric-blue-rgb), 0.55);
  background:
    linear-gradient(90deg, rgba(var(--electric-blue-rgb), 0.09), transparent 38%),
    rgba(var(--surface-rgb), 0.82);
}

.case-file__visual--publication {
  isolation: isolate;
}

.case-file__visual--publication::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: radial-gradient(circle at 50% 50%, rgba(var(--electric-blue-rgb), 0.12), transparent 54%);
}

.publication-terminal {
  position: absolute;
  z-index: 3;
  width: 0.8rem;
  height: 0.8rem;
  border: 2px solid var(--electric-blue);
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 0 0 12px rgba(var(--electric-blue-rgb), 0.28);
}

.publication-terminal--gate {
  top: 50%;
  left: 0.8rem;
  transform: translateY(-50%);
}

.publication-terminal--drain {
  top: 50%;
  right: 0.8rem;
  transform: translateY(-50%);
}

.publication-terminal--source {
  bottom: 0.65rem;
  left: 50%;
  transform: translateX(-50%);
}

.publication-channel {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  width: 4.4rem;
  height: 2.2rem;
  transform: translate(-50%, -50%);
  border: 1px solid var(--electric-blue);
  background: var(--surface-secondary);
  box-shadow: inset 0 0 0 0.55rem rgba(var(--electric-blue-rgb), 0.035);
}

.publication-channel::before,
.publication-channel::after {
  position: absolute;
  top: 50%;
  width: 0.9rem;
  height: 1px;
  content: "";
  background: var(--electric-blue);
}

.publication-channel::before { right: 100%; }
.publication-channel::after { left: 100%; }

.publication-path {
  position: absolute;
  z-index: 1;
  height: 1px;
  background: var(--line-strong);
}

.publication-path--input {
  top: 50%;
  right: 50%;
  left: 1.25rem;
}

.publication-path--output {
  top: 50%;
  right: 1.25rem;
  left: 50%;
}

.publication-path--source {
  top: 50%;
  bottom: 1.1rem;
  left: 50%;
  width: 1px;
  height: auto;
}

.publication-wave {
  position: absolute;
  top: 1rem;
  left: 1.1rem;
  width: 4.8rem;
  height: 1.35rem;
  border-top: 2px solid var(--green);
  border-radius: 50%;
  opacity: 0.65;
  transform: skewX(-18deg);
}

.case-file__visual--publication small {
  position: absolute;
  right: 0.65rem;
  bottom: 0.45rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.56rem;
  letter-spacing: 0.06em;
}

.case-file__details--publication .case-detail-block--document {
  grid-column: span 2;
  display: grid;
  grid-template-columns: minmax(10rem, 0.72fr) minmax(13rem, 1fr);
  gap: var(--space-4);
  min-height: 23rem;
  padding: var(--space-4);
}

.article-preview {
  display: block;
  min-height: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: #ffffff;
}

.article-preview img {
  width: 100%;
  height: 100%;
  max-height: 20rem;
  object-fit: cover;
  object-position: top center;
  transition: transform var(--duration-slow) var(--ease-standard);
}

.article-preview:hover img,
.article-preview:focus-visible img {
  transform: scale(1.025);
}

.article-document-meta {
  align-self: center;
}

.article-document-meta h4 {
  margin-top: 0.6rem;
  font-size: var(--step-1);
}

.article-document-meta p {
  margin-top: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.article-document-meta strong {
  color: var(--text-primary);
}

.article-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  margin-top: var(--space-4);
}

/* Project mini diagrams */
.visual-axis {
  position: absolute;
  background: var(--line-strong);
}

.visual-axis--x { right: 1rem; bottom: 1rem; left: 1rem; height: 1px; }
.visual-axis--y { top: 1rem; bottom: 1rem; left: 1rem; width: 1px; }

.visual-curve {
  position: absolute;
  right: 1.2rem;
  bottom: 1rem;
  left: 1rem;
  height: 4rem;
  border-top: 2px solid var(--electric-blue);
  border-radius: 50% 45% 0 0;
  transform: skewY(-10deg);
}

.visual-curve--two {
  height: 2.6rem;
  border-color: var(--green);
  opacity: 0.65;
  transform: skewY(12deg);
}

.case-file__visual--surrogate i {
  position: absolute;
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--electric-blue);
}

.case-file__visual--surrogate i:nth-of-type(1) { left: 22%; bottom: 34%; }
.case-file__visual--surrogate i:nth-of-type(2) { left: 43%; bottom: 61%; }
.case-file__visual--surrogate i:nth-of-type(3) { left: 64%; bottom: 42%; }
.case-file__visual--surrogate i:nth-of-type(4) { left: 82%; bottom: 70%; }

.rf-path {
  position: absolute;
  top: 50%;
  right: 1rem;
  left: 1rem;
  height: 2px;
  background: var(--electric-blue);
}

.rf-port {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 1rem;
  height: 1rem;
  transform: translateY(-50%);
  border: 2px solid var(--electric-blue);
  border-radius: 50%;
  background: var(--surface);
}

.rf-port--in { left: 0.75rem; }
.rf-port--out { right: 0.75rem; }

.rf-stage {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  width: 4rem;
  height: 4rem;
  transform: translate(-50%, -50%) rotate(45deg);
  border: 1px solid var(--electric-blue);
  background: var(--surface-secondary);
}

.rf-stage i {
  position: absolute;
  inset: 0.8rem;
  border: 1px dashed var(--line-strong);
}

.rf-feedback {
  position: absolute;
  top: 1.2rem;
  right: 28%;
  left: 28%;
  height: 3rem;
  border-top: 1px solid var(--amber);
  border-right: 1px solid var(--amber);
  border-left: 1px solid var(--amber);
}

.planning-cell {
  position: absolute;
  width: 5.5rem;
  height: 5.5rem;
  border: 1px solid rgba(var(--electric-blue-rgb), 0.45);
  border-radius: 50%;
}

.planning-cell::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.45rem;
  height: 0.45rem;
  content: "";
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--electric-blue);
}

.planning-cell--a { top: 0.6rem; left: 1rem; }
.planning-cell--b { top: 0.7rem; left: 38%; }
.planning-cell--c { top: 1.1rem; right: 0.6rem; }

.planning-user {
  position: absolute;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--green);
}

.planning-user--a { bottom: 1rem; left: 28%; }
.planning-user--b { bottom: 1.8rem; left: 55%; }
.planning-user--c { bottom: 0.8rem; right: 18%; }

.sensor-node,
.micro-node,
.analysis-node {
  position: absolute;
  top: 50%;
  display: grid;
  width: 3.2rem;
  height: 3.2rem;
  place-items: center;
  transform: translateY(-50%);
  border: 1px solid var(--electric-blue);
  background: var(--surface-secondary);
}

.sensor-node { left: 1rem; border-radius: 50%; }
.micro-node { left: 50%; transform: translate(-50%, -50%) rotate(45deg); }
.analysis-node { right: 1rem; }

.embedded-link {
  position: absolute;
  top: 50%;
  height: 1px;
  background: var(--line-strong);
}

.embedded-link--a { left: 4.2rem; width: calc(50% - 5.8rem); }
.embedded-link--b { right: 4.2rem; width: calc(50% - 5.8rem); }

.pulse-dot {
  position: absolute;
  top: calc(50% - 0.2rem);
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--electric-blue);
}

.pulse-dot--a { left: 31%; }
.pulse-dot--b { right: 31%; }

.case-file__visual--biomedical svg {
  width: 100%;
  height: 100%;
}

.case-file__visual--biomedical path {
  fill: none;
  stroke: var(--electric-blue);
  stroke-width: 2.5;
  vector-effect: non-scaling-stroke;
}

.alert-marker {
  position: absolute;
  top: 0.85rem;
  right: 1rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 12px rgba(239, 111, 134, 0.65);
}

.water-level {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 46%;
  background: rgba(var(--electric-blue-rgb), 0.1);
  border-top: 1px solid var(--electric-blue);
}

.water-sensor {
  position: absolute;
  top: 1rem;
  width: 2.6rem;
  height: 4.6rem;
  border: 1px solid var(--line-strong);
  background: var(--surface-secondary);
}

.water-sensor::after {
  position: absolute;
  right: 0.5rem;
  bottom: -1.6rem;
  left: 0.5rem;
  height: 1.6rem;
  content: "";
  border-right: 1px solid var(--electric-blue);
  border-left: 1px solid var(--electric-blue);
}

.water-sensor--a { left: 28%; }
.water-sensor--b { right: 28%; }

.water-ring {
  position: absolute;
  bottom: 0.8rem;
  width: 3.5rem;
  height: 1rem;
  border: 1px solid var(--electric-blue);
  border-radius: 50%;
}

.water-ring--a { left: 24%; }
.water-ring--b { right: 24%; }

/* =========================================================
   TECHNICAL SYSTEM MAP
========================================================= */
.systems-interface {
  display: grid;
  grid-template-columns: minmax(16rem, 0.55fr) minmax(28rem, 1.1fr) minmax(17rem, 0.5fr);
  gap: var(--space-4);
  align-items: stretch;
}

.systems-selector {
  display: grid;
  gap: 1px;
  border: var(--border);
  background: var(--line);
}

.system-button {
  display: grid;
  min-height: 7rem;
  align-content: center;
  padding: 1rem 1.2rem;
  border: 0;
  background: var(--surface);
  text-align: left;
  transition:
    background-color var(--duration-medium) ease,
    padding-left var(--duration-medium) var(--ease-standard);
}

.system-button:hover,
.system-button.is-active {
  padding-left: 1.55rem;
  background: rgba(var(--electric-blue-rgb), 0.1);
}

.system-button.is-active {
  box-shadow: inset 3px 0 0 var(--electric-blue);
}

.system-button span,
.system-button small {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.system-button strong {
  margin-block: 0.3rem;
  font-family: var(--font-heading);
  font-size: 1rem;
}

.system-display {
  position: relative;
  min-height: 43rem;
  overflow: hidden;
  padding: var(--space-6);
  border: var(--border-strong);
  background: var(--surface);
  box-shadow: var(--shadow-medium);
}

.system-display__topology {
  position: absolute;
  inset: 0 0 auto;
  height: 15rem;
  opacity: 0.48;
  pointer-events: none;
}

.system-display__topology svg {
  width: 100%;
  height: 100%;
}

.system-path {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}

.system-path--main {
  stroke: var(--electric-blue);
}

.system-path--secondary {
  stroke-dasharray: 5 8;
}

.system-pulse {
  position: absolute;
  top: 50%;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--electric-blue);
  box-shadow: 0 0 12px rgba(var(--electric-blue-rgb), 0.65);
}

.system-pulse--a { left: 14%; top: 45%; }
.system-pulse--b { left: 52%; top: 52%; }
.system-pulse--c { right: 14%; top: 47%; }

.system-display__header,
.system-display h3,
.system-display > p,
.system-tool-grid,
.system-projects {
  position: relative;
  z-index: 1;
}

.system-display h3 {
  margin-top: 12rem;
  font-size: var(--step-3);
}

.system-display > p {
  max-width: 43rem;
  margin-top: var(--space-4);
  color: var(--text-primary);
}

.system-tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-top: var(--space-5);
}

.system-tool-grid span {
  display: flex;
  min-height: 3.4rem;
  align-items: center;
}

.system-projects {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
}

.system-projects > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.system-projects a {
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--line-strong);
  color: var(--text-secondary);
  font-size: 0.76rem;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.system-projects a:hover {
  border-color: var(--electric-blue);
  color: var(--electric-blue);
}

.system-principle {
  display: flex;
  min-height: 43rem;
  flex-direction: column;
  padding: var(--space-5);
  border: var(--border);
  background: var(--surface-secondary);
}

.system-principle blockquote {
  margin-top: auto;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.35;
}

.system-principle__sequence {
  display: grid;
  gap: 0.6rem;
  margin-top: auto;
}

.system-principle__sequence span {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.67rem;
}

.system-principle__sequence i {
  width: 1px;
  height: 1.7rem;
  margin-left: 0.2rem;
  background: var(--line-strong);
}

/* =========================================================
   EDUCATION, METHOD, CREDENTIALS
========================================================= */
.education-timeline {
  position: relative;
  max-width: 78rem;
  margin-inline: auto;
}

.education-axis {
  position: absolute;
  top: 1rem;
  bottom: 1rem;
  left: 11.6rem;
  width: 1px;
  background: var(--line-strong);
}

.education-axis span {
  position: absolute;
  top: 0;
  left: 50%;
  width: 0.5rem;
  height: 0.5rem;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--electric-blue);
  box-shadow: 0 0 12px rgba(var(--electric-blue-rgb), 0.55);
}

.education-entry {
  display: grid;
  grid-template-columns: 10rem 3.2rem 1fr;
  gap: 0;
  min-height: 13rem;
}

.education-entry__year {
  padding-top: 0.35rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.education-entry__node {
  position: relative;
}

.education-entry__node span {
  position: absolute;
  top: 0.5rem;
  left: 50%;
  width: 0.75rem;
  height: 0.75rem;
  transform: translateX(-50%);
  border: 2px solid var(--electric-blue);
  border-radius: 50%;
  background: var(--background);
}

.education-entry--master .education-entry__node span {
  background: var(--electric-blue);
  box-shadow: 0 0 15px rgba(var(--electric-blue-rgb), 0.5);
}

.education-entry__content {
  padding: 0 0 var(--space-6) var(--space-5);
  border-bottom: 1px solid var(--line-faint);
}

.education-entry__content h3 {
  max-width: 31ch;
  margin-top: 0.5rem;
}

.education-entry__content > p {
  margin-top: 0.7rem;
}

.thesis-line {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  margin-top: var(--space-4);
  padding: var(--space-4);
  border-left: 2px solid var(--electric-blue);
  background: rgba(var(--electric-blue-rgb), 0.06);
}

.thesis-line span {
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.thesis-line strong {
  font-size: 0.92rem;
}

.discipline-progression {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  margin-top: var(--space-7);
  padding: var(--space-4);
  border: var(--border);
  background: rgba(var(--surface-rgb), 0.55);
  overflow-x: auto;
}

.discipline-progression span,
.discipline-progression strong {
  flex: 0 0 auto;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  white-space: nowrap;
}

.discipline-progression strong {
  color: var(--electric-blue);
}

.discipline-progression i {
  position: relative;
  width: 2rem;
  height: 1px;
  flex: 0 0 auto;
  background: var(--line-strong);
}

.discipline-progression i::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 0.35rem;
  height: 0.35rem;
  content: "";
  transform: translateY(-50%) rotate(45deg);
  border-top: 1px solid var(--electric-blue);
  border-right: 1px solid var(--electric-blue);
}

.method-layer {
  margin-top: var(--space-10);
}

.method-heading {
  max-width: 52rem;
  margin-bottom: var(--space-6);
}

.method-heading h3 {
  font-size: var(--step-3);
}

.method-sequence {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  list-style: none;
}

.method-sequence li {
  position: relative;
  min-height: 18rem;
  padding: var(--space-5);
  border-right: 1px solid var(--line);
}

.method-sequence li:last-child {
  border-right: 0;
}

.method-sequence li::before {
  position: absolute;
  top: -2px;
  left: 0;
  width: 0;
  height: 3px;
  content: "";
  background: var(--electric-blue);
  transition: width var(--duration-slow) var(--ease-standard);
}

.method-sequence li:hover::before {
  width: 100%;
}

.method-sequence li > span {
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.method-sequence div {
  margin-top: 6rem;
}

.method-sequence h4 {
  font-size: 1.15rem;
}

.method-sequence p {
  margin-top: 0.75rem;
  font-size: 0.84rem;
}

.credentials-layer {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.credentials-block {
  border: var(--border);
  background: rgba(var(--surface-rgb), 0.62);
}

.credentials-block__header {
  padding: var(--space-5);
  border-bottom: 1px solid var(--line);
}

.credentials-block__header h3 {
  margin-top: 0.4rem;
}

.credentials-block ul,
.language-list {
  list-style: none;
}

.credentials-block li,
.language-list > div {
  display: grid;
  min-height: 4rem;
  align-items: center;
  padding: 0.8rem var(--space-5);
  border-bottom: 1px solid var(--line-faint);
}

.credentials-block li {
  grid-template-columns: 4rem 1fr;
  color: var(--text-secondary);
}

.credentials-block li:last-child,
.language-list > div:last-child {
  border-bottom: 0;
}

.credentials-block li span {
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
}

.language-list > div {
  grid-template-columns: 1fr auto;
}

.language-list dt {
  color: var(--text-primary);
  font-weight: 600;
}

.language-list dd {
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

/* =========================================================
   CONTACT LAYER
========================================================= */
.contact-layer {
  padding-bottom: var(--space-8);
}

.contact-interface {
  display: grid;
  grid-template-columns: minmax(20rem, 0.68fr) minmax(30rem, 1.12fr);
  gap: var(--space-7);
  align-items: stretch;
}

.contact-intro {
  display: flex;
  flex-direction: column;
}

.contact-intro h2 {
  max-width: 11ch;
  font-size: var(--step-4);
}

.contact-intro > p:not(.eyebrow) {
  max-width: 36rem;
  margin-top: var(--space-4);
  color: var(--text-primary);
  font-size: var(--step-1);
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-top: var(--space-6);
  padding: var(--space-4);
  border: 1px solid rgba(85, 214, 167, 0.3);
  background: rgba(85, 214, 167, 0.06);
}

.connection-status strong,
.connection-status small {
  display: block;
}

.connection-status strong {
  font-size: 0.9rem;
}

.connection-status small {
  margin-top: 0.15rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.contact-addresses {
  margin-top: auto;
  padding-top: var(--space-7);
}

.contact-addresses > div {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1rem;
  padding-block: 0.8rem;
  border-bottom: 1px solid var(--line-faint);
}

.contact-addresses dt {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-addresses dd {
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.contact-addresses a {
  transition: color var(--duration-fast) ease;
}

.contact-addresses a:hover {
  color: var(--electric-blue);
}

.contact-terminal {
  position: relative;
  min-height: 46rem;
  padding: var(--space-5);
  border: var(--border-strong);
  background:
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px),
    var(--surface);
  background-size: 42px 42px;
  box-shadow: var(--shadow-medium);
}

.contact-terminal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--line);
}

.contact-terminal__header > span:last-child {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 0.65rem;
}

.contact-terminal__header i {
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px rgba(85, 214, 167, 0.6);
}

.contact-form {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.form-field {
  display: grid;
  gap: 0.45rem;
}

.form-field label {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  outline: none;
  background: rgba(var(--background-rgb), 0.58);
  color: var(--text-primary);
  transition:
    border-color var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease,
    background-color var(--duration-fast) ease;
}

.form-field input {
  min-height: 3.25rem;
  padding: 0.75rem 0.85rem;
}

.form-field textarea {
  min-height: 11rem;
  resize: vertical;
  padding: 0.85rem;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--electric-blue);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(var(--electric-blue-rgb), 0.1);
}

.form-field input[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] {
  border-color: var(--red);
}

.form-error {
  min-height: 1.05rem;
  color: var(--red);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.contact-form__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: 0.5rem;
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
}

.contact-form__footer p {
  max-width: 28rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.contact-success {
  position: absolute;
  inset: var(--space-5);
  display: grid;
  place-content: center;
  padding: var(--space-7);
  background: var(--surface);
  text-align: center;
}

.contact-success__signal {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: var(--space-5);
}

.contact-success__signal span {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px rgba(85, 214, 167, 0.55);
}

.contact-success h3 {
  margin-top: 0.7rem;
  font-size: var(--step-3);
}

.contact-success p {
  max-width: 34rem;
  margin: var(--space-4) auto var(--space-5);
}

.contact-success .button {
  justify-self: center;
}

/* =========================================================
   FOOTER AND BACK TO TOP
========================================================= */
.site-footer {
  display: grid;
  width: min(var(--content-width), calc(100% - 3rem));
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  gap: var(--space-5);
  margin-inline: auto;
  padding-block: var(--space-6);
  border-top: 1px solid var(--line-strong);
}

.site-footer > div:first-child strong,
.site-footer > div:first-child span {
  display: block;
}

.site-footer > div:first-child strong {
  font-family: var(--font-heading);
}

.site-footer > div:first-child span,
.site-footer p,
.footer-links {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.site-footer p {
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
}

.footer-links a:hover {
  color: var(--electric-blue);
}

.back-to-top {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  z-index: 80;
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  transform: translateY(5rem);
  border: 1px solid var(--electric-blue);
  border-radius: var(--radius-small);
  background: var(--surface);
  color: var(--electric-blue);
  box-shadow: var(--shadow-small);
  opacity: 0;
  transition:
    transform var(--duration-medium) var(--ease-standard),
    opacity var(--duration-medium) ease,
    background-color var(--duration-fast) ease;
}

.back-to-top.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.back-to-top:hover {
  background: rgba(var(--electric-blue-rgb), 0.12);
}
.honeypot-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}