:root {
  --primary: #00E5FF;
  --secondary: #111827;
  --bg: #05070B;
  --text: #E6F7FF;
  --accent: #A78BFA;
  --text-muted: rgba(230, 247, 255, 0.55);
  --border: rgba(0, 229, 255, 0.12);
  --border-dim: rgba(230, 247, 255, 0.08);
  --glass: rgba(17, 24, 39, 0.65);
  --mono: "IBM Plex Mono", "JetBrains Mono", monospace;
  --heading: "Space Grotesk", "Sora", sans-serif;
  --body: "Inter", "IBM Plex Sans", sans-serif;
  --section-pad: clamp(4rem, 8vw, 7rem);
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 0.95rem;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.boot-active {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10000;
  padding: 0.5rem 1rem;
  background: var(--secondary);
  border: 1px solid var(--primary);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.skip-link:focus {
  top: 1rem;
}

/* ── Signal Orb Navigation ── */
.orb-trigger {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, var(--primary), rgba(0, 229, 255, 0.15));
  border: 1px solid rgba(0, 229, 255, 0.4);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
  position: relative;
  transition: transform 0.3s, box-shadow 0.3s;
}

.orb-trigger::before,
.orb-trigger::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid rgba(0, 229, 255, 0.2);
  animation: orbPulse 3s ease-in-out infinite;
}

.orb-trigger::after {
  inset: -12px;
  animation-delay: 1.5s;
  opacity: 0.5;
}

.orb-trigger:hover,
.orb-trigger[aria-expanded="true"] {
  box-shadow: 0 0 32px rgba(0, 229, 255, 0.45);
  transform: scale(1.05);
}

@keyframes orbPulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.15); opacity: 0; }
}

.signal-orb-nav {
  position: fixed;
  top: 1.25rem;
  left: 1.25rem;
  z-index: 1000;
  width: 44px;
  height: 44px;
}

.radial-menu {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.radial-menu.open {
  pointer-events: auto;
  opacity: 1;
}

.radial-menu a {
  position: absolute;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--border);
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  white-space: nowrap;
  transform: translate(-50%, -50%) scale(0.6);
  opacity: 0;
  transition: color 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.35s, opacity 0.35s;
}

.radial-menu.open a {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}

.radial-menu a:hover,
.radial-menu a:focus-visible {
  color: var(--primary);
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
  outline: none;
}

/* ── System Layer Base ── */
.system-layer {
  position: relative;
  min-height: 100vh;
  padding: var(--section-pad) clamp(1.25rem, 4vw, 3rem);
  border-bottom: 1px solid var(--border-dim);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.layer-id {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.layer-id::before {
  content: "▸";
  color: var(--accent);
  font-size: 0.5rem;
}

.layer-title {
  font-family: var(--heading);
  font-size: clamp(1.25rem, 1rem + 1.5vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
  color: var(--text);
}

.scan-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 229, 255, 0.015) 2px,
    rgba(0, 229, 255, 0.015) 4px
  );
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.4), transparent 80%);
}

/* ── Section 1: Boot Sequence ── */
.boot-sequence {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.boot-sequence.complete {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.boot-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.boot-content {
  position: relative;
  z-index: 2;
  text-align: center;
  width: min(90%, 520px);
}

.boot-status {
  font-family: var(--mono);
  font-size: clamp(0.7rem, 2vw, 0.85rem);
  letter-spacing: 0.2em;
  color: var(--primary);
  margin-bottom: 2.5rem;
  text-transform: uppercase;
}

.boot-status .cursor-blink {
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.boot-logo {
  display: flex;
  justify-content: center;
  gap: 0.35rem;
  margin-bottom: 2rem;
  height: 48px;
}

.logo-fragment {
  width: 8px;
  height: 48px;
  background: var(--primary);
  opacity: 0;
  transform: translateY(20px) scaleY(0.3);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
  animation: fragmentAssemble 0.6s ease forwards;
}

.logo-fragment:nth-child(1) { animation-delay: 0.1s; height: 32px; align-self: flex-end; }
.logo-fragment:nth-child(2) { animation-delay: 0.2s; }
.logo-fragment:nth-child(3) { animation-delay: 0.3s; height: 40px; }
.logo-fragment:nth-child(4) { animation-delay: 0.4s; }
.logo-fragment:nth-child(5) { animation-delay: 0.5s; height: 28px; align-self: flex-end; }
.logo-fragment:nth-child(6) { animation-delay: 0.6s; height: 44px; }
.logo-fragment:nth-child(7) { animation-delay: 0.7s; }

@keyframes fragmentAssemble {
  to {
    opacity: 1;
    transform: translateY(0) scaleY(1);
  }
}

.boot-progress {
  width: 100%;
  height: 2px;
  background: rgba(0, 229, 255, 0.1);
  margin-bottom: 1rem;
  overflow: hidden;
}

.boot-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  box-shadow: 0 0 8px var(--primary);
  transition: width 0.1s linear;
}

.boot-sync {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0.4;
  animation: scanVertical 4s linear infinite;
}

@keyframes scanVertical {
  0% { top: -2px; }
  100% { top: 100%; }
}

/* ── Section 2: Neural Signal Grid ── */
.signal-grid-wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 2px;
  background: var(--border-dim);
  border: 1px solid var(--border-dim);
}

.signal-node {
  position: relative;
  background: var(--secondary);
  padding: 1.25rem 1rem;
  min-height: 120px;
  overflow: hidden;
  cursor: default;
  transition: background 0.3s, box-shadow 0.3s;
}

.signal-node::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(0, 229, 255, 0.15), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s;
}

.signal-node:hover::before,
.signal-node:focus-within::before {
  opacity: 1;
}

.signal-node:hover {
  background: rgba(17, 24, 39, 0.9);
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, 0.2);
  z-index: 1;
}

.signal-node .node-id {
  font-family: var(--mono);
  font-size: 0.55rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.signal-node .node-state {
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
}

.signal-node .node-data {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.4;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease, margin 0.3s;
}

.signal-node:hover .node-data,
.signal-node:focus-within .node-data {
  max-height: 80px;
  opacity: 1;
  margin-top: 0.5rem;
}

.expansion-wave {
  position: absolute;
  width: 20px;
  height: 20px;
  border: 1px solid rgba(0, 229, 255, 0.4);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  pointer-events: none;
  animation: expansionWave 0.8s ease-out forwards;
}

@keyframes expansionWave {
  to {
    transform: translate(-50%, -50%) scale(8);
    opacity: 0;
  }
}

/* ── Section 3: Module Stack ── */
.module-stack {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.module-layer {
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-dim);
  overflow: hidden;
  transition: border-color 0.3s;
}

.module-layer:hover,
.module-layer.expanded {
  border-color: rgba(0, 229, 255, 0.25);
}

.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  gap: 1rem;
  width: 100%;
  text-align: left;
}

.module-header h3 {
  font-family: var(--heading);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.module-index {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.module-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
  flex-shrink: 0;
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.module-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease;
}

.module-layer.expanded .module-body {
  max-height: 200px;
}

.module-content {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid var(--border-dim);
  padding-top: 1rem;
}

.module-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.75rem;
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--primary);
}

/* ── Section 4: Data Stream Corridor ── */
.stream-corridor {
  width: 100%;
  overflow: hidden;
  position: relative;
  padding: 2rem 0;
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}

.stream-track {
  display: flex;
  gap: 1rem;
  animation: streamFlow 40s linear infinite;
  width: max-content;
}

.stream-track:hover {
  animation-play-state: paused;
}

@keyframes streamFlow {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.data-packet {
  flex-shrink: 0;
  min-width: 220px;
  padding: 1rem 1.25rem;
  background: var(--secondary);
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.68rem;
  position: relative;
  overflow: hidden;
}

.data-packet::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--accent);
}

.data-packet .pkt-type {
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
  font-size: 0.58rem;
}

.data-packet .pkt-content {
  color: var(--text-muted);
  line-height: 1.5;
}

.data-packet .pkt-ts {
  margin-top: 0.5rem;
  font-size: 0.55rem;
  color: rgba(0, 229, 255, 0.5);
}

/* ── Section 5: Network Topology ── */
.topology-wrap {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.topology-canvas {
  width: 100%;
  height: clamp(320px, 50vh, 480px);
  display: block;
  border: 1px solid var(--border-dim);
  background: rgba(17, 24, 39, 0.3);
}

.topology-zones {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  justify-content: center;
}

.zone-tag {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--border-dim);
  color: var(--text-muted);
  transition: color 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.zone-tag:hover,
.zone-tag.active {
  color: var(--primary);
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.15);
}

/* ── Section 6: Archive Vault ── */
.vault {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  border: 1px solid var(--border);
  background: rgba(5, 7, 11, 0.9);
}

.vault-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--secondary);
  border-bottom: 1px solid var(--border-dim);
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.vault-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.vault-dot.cyan { background: var(--primary); }
.vault-dot.violet { background: var(--accent); }

.vault-entries {
  max-height: 360px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.vault-entry {
  display: grid;
  grid-template-columns: 140px 80px 1fr;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border-dim);
  font-family: var(--mono);
  font-size: 0.68rem;
  transition: background 0.2s, padding-left 0.2s;
}

.vault-entry:hover {
  background: rgba(0, 229, 255, 0.03);
  padding-left: 1.5rem;
}

.vault-entry .entry-ts {
  color: rgba(0, 229, 255, 0.6);
}

.vault-entry .entry-type {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.vault-entry .entry-msg {
  color: var(--text-muted);
}

/* ── Section 7: Synthetic Field ── */
.field-layer {
  min-height: 100vh;
  padding: 0;
  position: relative;
}

.field-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.field-label {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  z-index: 2;
  pointer-events: none;
}

/* ── Section 8: Status Panel ── */
.status-panel {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  border: 1px solid var(--border);
  background: rgba(17, 24, 39, 0.5);
  font-family: var(--mono);
  font-size: clamp(0.72rem, 2vw, 0.85rem);
}

.status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-dim);
  letter-spacing: 0.06em;
}

.status-row:last-child {
  border-bottom: none;
}

.status-label {
  color: var(--text-muted);
  text-transform: uppercase;
}

.status-value {
  color: var(--primary);
  text-transform: uppercase;
}

.status-value.stable { color: var(--primary); }
.status-value.optimal { color: #34d399; }
.status-value.high { color: var(--accent); }

.status-flicker {
  animation: signalFlicker 4s ease-in-out infinite;
}

@keyframes signalFlicker {
  0%, 90%, 100% { opacity: 1; }
  92% { opacity: 0.7; }
  94% { opacity: 1; }
  96% { opacity: 0.85; }
}

/* ── Section 9: Signal Core ── */
.core-layer {
  text-align: center;
  align-items: center;
}

.signal-core-wrap {
  position: relative;
  width: clamp(200px, 40vw, 280px);
  height: clamp(200px, 40vw, 280px);
  margin: 0 auto 2.5rem;
}

.core-ring {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: 50%;
  animation: ringRotate 20s linear infinite;
}

.core-ring:nth-child(2) {
  inset: 15%;
  border-color: rgba(167, 139, 250, 0.25);
  animation-duration: 15s;
  animation-direction: reverse;
}

.core-ring:nth-child(3) {
  inset: 30%;
  border-color: rgba(0, 229, 255, 0.35);
  animation-duration: 10s;
}

@keyframes ringRotate {
  to { transform: rotate(360deg); }
}

.signal-core {
  position: absolute;
  inset: 38%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--primary), rgba(0, 229, 255, 0.2));
  box-shadow: 0 0 40px rgba(0, 229, 255, 0.4), 0 0 80px rgba(167, 139, 250, 0.2);
  animation: corePulse 4s ease-in-out infinite;
}

@keyframes corePulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 40px rgba(0, 229, 255, 0.4), 0 0 80px rgba(167, 139, 250, 0.2); }
  50% { transform: scale(1.08); box-shadow: 0 0 60px rgba(0, 229, 255, 0.6), 0 0 100px rgba(167, 139, 250, 0.35); }
}

.core-title {
  font-family: var(--heading);
  font-size: clamp(1.1rem, 1rem + 1vw, 1.5rem);
  font-weight: 600;
  letter-spacing: 0.12em;
  margin-bottom: 2rem;
  color: var(--text);
}

.relay-btn {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.9rem 2rem;
  border: 1px solid rgba(0, 229, 255, 0.4);
  background: rgba(0, 229, 255, 0.06);
  color: var(--primary);
  transition: background 0.3s, box-shadow 0.3s, border-color 0.3s, transform 0.2s;
}

.relay-btn:hover,
.relay-btn:focus-visible {
  background: rgba(0, 229, 255, 0.15);
  box-shadow: 0 0 32px rgba(0, 229, 255, 0.35), 0 0 64px rgba(167, 139, 250, 0.15);
  border-color: var(--primary);
  outline: none;
}

.relay-btn:active {
  transform: scale(0.98);
}

.relay-btn.intense {
  box-shadow: 0 0 48px rgba(0, 229, 255, 0.55), 0 0 96px rgba(167, 139, 250, 0.25);
}

/* ── Contact Endpoint ── */
.contact-layer {
  min-height: 50vh;
  text-align: center;
}

.contact-endpoint {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 1.5rem 2.5rem;
  border: 1px solid var(--border);
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
}

.contact-endpoint::before,
.contact-endpoint::after {
  content: "◈";
  position: absolute;
  color: var(--accent);
  font-size: 0.6rem;
  opacity: 0.6;
}

.contact-endpoint::before { top: 0.5rem; left: 0.75rem; }
.contact-endpoint::after { bottom: 0.5rem; right: 0.75rem; }

.contact-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.contact-email {
  font-family: var(--mono);
  font-size: clamp(0.95rem, 1vw + 0.5rem, 1.2rem);
  color: var(--primary);
  transition: text-shadow 0.3s;
}

.contact-email:hover {
  text-shadow: 0 0 16px rgba(0, 229, 255, 0.5);
}

.contact-classified {
  margin-top: 0.75rem;
  font-family: var(--mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

/* ── Glitch utility ── */
.glitch-active {
  animation: softGlitch 0.15s ease;
}

@keyframes softGlitch {
  0% { transform: translate(0); filter: none; }
  25% { transform: translate(-2px, 1px); filter: hue-rotate(10deg); }
  50% { transform: translate(2px, -1px); }
  75% { transform: translate(-1px, -1px); filter: hue-rotate(-10deg); }
  100% { transform: translate(0); filter: none; }
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .signal-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .vault-entry {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .data-packet {
    min-width: 180px;
  }

  .signal-orb-nav {
    top: 1rem;
    left: 1rem;
  }
}

@media (max-width: 480px) {
  .system-layer {
    padding: 3.5rem 1rem;
  }

  .module-header h3 {
    font-size: 0.78rem;
  }
}

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

  html { scroll-behavior: auto; }

  .stream-track {
    animation: none;
  }
}