:root {
  /* Obsidian / True Midnight Palette */
  --ink: #06090e;
  --ink-2: #0a1017;
  --ink-3: #101924;
  --ink-4: #162232;

  /* Card and Panel Glass Surfaces */
  --card-bg: rgba(13, 22, 34, 0.78);
  --card-bg-elevated: rgba(18, 29, 44, 0.88);
  --card-bg-glass: rgba(10, 18, 28, 0.65);
  --terminal-bg: #070c14;

  /* High Readability Apple/Stripe-grade Text */
  --paper: #ffffff;
  --paper-2: #f1f5f9;
  --body-text: #cbd5e1;
  --muted: #94a3b8;
  --muted-2: #64748b;

  /* Crisp Borders */
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --line-glow: rgba(var(--signal-rgb), 0.3);

  /* Luminous Accents — primary is themeable via --signal / --signal-rgb */
  --signal: #34d399;        /* Harbor Emerald (default primary) */
  --signal-rgb: 52, 211, 153;
  --signal-hover: #6ee7b7;
  --signal-2: #10b981;      /* Crisp Emerald */
  --blue: #38bdf8;          /* Electric Blue (agent / synthetic) */
  --amber: #fbbf24;         /* Crisp Luminous Amber */
  --red: #f87171;           /* Crisp Coral Red */
  --green: #10b981;         /* Crisp Emerald Green */

  /* Glow Effects */
  --glow-cyan: 0 0 25px rgba(var(--signal-rgb), 0.25);
  --glow-emerald: 0 0 25px rgba(16, 185, 129, 0.25);
  --glow-blue: 0 0 25px rgba(56, 189, 248, 0.25);
  --glow-amber: 0 0 25px rgba(251, 191, 36, 0.25);

  /* Typography */
  --display: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, system-ui, sans-serif;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --serif: "Iowan Old Style", Baskerville, "Times New Roman", Georgia, serif;
  --container: 1240px;
  --read: 1160px;
}

/* ==========================================================
   Theme Palettes — swap the primary accent without touching layout.
   Applied via <html data-theme="...">. Default (no attribute) = emerald.
   Preview live with ?theme=emerald | teal | amber | cyan
   ========================================================== */
html[data-theme="emerald"] {
  --signal: #34d399;
  --signal-rgb: 52, 211, 153;
  --signal-hover: #6ee7b7;
}

html[data-theme="teal"] {
  --signal: #2dd4bf;
  --signal-rgb: 45, 212, 191;
  --signal-hover: #5eead4;
}

html[data-theme="amber"] {
  --signal: #f5b544;
  --signal-rgb: 245, 181, 68;
  --signal-hover: #fcd34d;
}

html[data-theme="cyan"] {
  --signal: #00f2fe;
  --signal-rgb: 0, 242, 254;
  --signal-hover: #38bdf8;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--ink);
  color-scheme: dark;
}

body {
  margin: 0;
  color: var(--body-text);
  background: var(--ink);
  font-family: var(--display);
  font-size: 15px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::selection {
  color: #05080f;
  background: var(--signal);
}

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

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

button, a {
  -webkit-tap-highlight-color: transparent;
}

code, pre {
  font-family: var(--mono);
}

h1, h2, h3, h4, p {
  margin-top: 0;
}

h1, h2, h3 {
  color: var(--paper);
}

h1 em, h2 em {
  color: var(--signal);
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.04em;
}

h2 strong {
  color: var(--signal);
  font-weight: 600;
}

/* Background Atmosphere */
.grain {
  position: fixed;
  inset: 0;
  z-index: 30;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='.4'/%3E%3C/svg%3E");
}

.ambient-glow {
  position: fixed;
  pointer-events: none;
  z-index: -1;
  border-radius: 50%;
  filter: blur(80px);
}

.ambient-glow-one {
  width: 750px;
  height: 750px;
  top: -260px;
  right: -150px;
  background: radial-gradient(circle, rgba(var(--signal-rgb), 0.12) 0%, rgba(56, 189, 248, 0.05) 45%, transparent 70%);
}

.ambient-glow-two {
  width: 650px;
  height: 650px;
  left: -260px;
  top: 42%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.09) 0%, rgba(var(--signal-rgb), 0.03) 50%, transparent 70%);
}

.scroll-progress {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--signal), var(--signal-2));
  box-shadow: 0 0 12px var(--signal);
  transition: width 0.1s linear;
}

/* Site Header */
.site-header {
  width: min(var(--container), calc(100% - 64px));
  height: 80px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 40;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
  font-weight: 700;
  letter-spacing: -0.03em;
  transition: opacity 0.2s;
}

.brand:hover {
  opacity: 0.9;
}

.brand-mark {
  width: 32px;
  height: 32px;
  color: var(--signal);
  display: grid;
  place-items: center;
  filter: drop-shadow(0 0 8px rgba(var(--signal-rgb), 0.35));
}

.brand-mark svg {
  width: 100%;
  height: 100%;
}

.brand-name {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-badge {
  padding: 3px 7px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--signal);
  background: rgba(var(--signal-rgb), 0.08);
  font: 10px var(--mono);
  letter-spacing: 0.12em;
  font-weight: 600;
}

.brand-badge.beta-tag {
  color: var(--amber);
  border-color: rgba(251, 191, 36, 0.35);
  background: rgba(251, 191, 36, 0.1);
}

.desktop-nav {
  display: flex;
  gap: 32px;
  align-items: center;
  margin-left: auto;
  margin-right: 48px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.desktop-nav a,
.header-link {
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

.desktop-nav a:hover,
.header-link:hover {
  color: var(--paper);
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.3);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--muted-2);
  font: 11px var(--mono);
  letter-spacing: 0.05em;
}

.header-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 999px;
  color: var(--green);
}

.header-live i {
  width: 6px;
  height: 6px;
  display: inline-block;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulseGlow 2s infinite ease-in-out;
}

.header-live.beta-badge {
  background: rgba(251, 191, 36, 0.1);
  border-color: rgba(251, 191, 36, 0.3);
  color: var(--amber);
}

.header-live.beta-badge i {
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber);
}

.beta-callout-box {
  margin: 22px 0 24px;
  padding: 16px 18px;
  background: rgba(251, 191, 36, 0.06);
  border: 1px solid rgba(251, 191, 36, 0.24);
  border-left: 3px solid var(--amber);
  border-radius: 4px;
}

.beta-callout-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.beta-callout-tag {
  padding: 2px 7px;
  background: rgba(251, 191, 36, 0.2);
  border: 1px solid rgba(251, 191, 36, 0.4);
  border-radius: 3px;
  color: var(--amber);
  font: 9px var(--mono);
  font-weight: 700;
  letter-spacing: 0.1em;
}

.beta-callout-header strong {
  color: var(--paper);
  font-size: 13px;
  font-weight: 600;
}

.beta-callout-box p {
  margin: 0;
  color: var(--paper-2);
  font-size: 12px;
  line-height: 1.6;
}

.mini-led.amber {
  background: var(--amber);
  box-shadow: 0 0 9px var(--amber);
}

.header-link {
  display: inline-flex;
  align-items: center;
  color: var(--paper-2);
  padding: 6px 12px;
  border-radius: 4px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  transition: all 0.2s;
}

.header-link:hover {
  border-color: var(--line-strong);
  color: var(--signal);
}

.header-link span {
  color: var(--signal);
  margin-left: 5px;
  font-size: 11px;
}

.header-icon-link {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.header-icon-link:hover {
  color: var(--signal);
  border-color: var(--line-glow);
  background: rgba(var(--signal-rgb), 0.08);
}

.header-icon-link svg {
  width: 16px;
  height: 16px;
}

.menu-toggle {
  display: none;
}

.mobile-menu {
  display: none;
}

/* Shell & Typography */
.section-shell {
  width: min(var(--read), calc(100% - 64px));
  margin: 0 auto;
}

.eyebrow, .section-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--signal);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font: 11px var(--mono);
  font-weight: 600;
}

.eyebrow-line {
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal);
}

.section-kicker {
  margin-bottom: 32px;
}

.section-kicker > span {
  color: var(--muted-2);
}

.section-heading h2,
.premise-heading h2,
.proof-copy h2,
.install-copy h2,
.faq-heading h2 {
  margin: 0;
  font-size: clamp(38px, 4.8vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-weight: 600;
  color: var(--paper);
}

.section-description {
  max-width: 460px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.section-description code,
.premise-heading code,
.faq-list code,
.boundary-summary code {
  color: var(--blue);
  background: rgba(56, 189, 248, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid rgba(56, 189, 248, 0.2);
  font-size: 0.9em;
}

/* Hero Section */
.hero {
  min-height: 720px;
  padding: 80px 0 90px;
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  align-items: center;
  gap: 56px;
  position: relative;
}

.hero-copy, .hero-stage {
  position: relative;
  z-index: 2;
}

.hero h1 {
  max-width: 620px;
  margin: 22px 0 24px;
  font-size: clamp(54px, 6.8vw, 98px);
  line-height: 0.92;
  letter-spacing: -0.05em;
  font-weight: 600;
}

.hero-lede {
  max-width: 460px;
  margin: 0;
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 22px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #040810;
  background: var(--signal);
  border-color: rgba(var(--signal-rgb), 0.6);
  box-shadow: 0 0 20px rgba(var(--signal-rgb), 0.3), 0 10px 30px rgba(var(--signal-rgb), 0.15);
}

.button-primary:hover {
  background: #4ef3a6;
  border-color: #4ef3a6;
  box-shadow: 0 0 25px rgba(78, 243, 166, 0.4), 0 12px 35px rgba(78, 243, 166, 0.2);
}

.button-quiet {
  color: var(--paper-2);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line-strong);
}

.button-quiet:hover {
  color: var(--paper);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
}

.button-orb {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--signal);
  font-size: 12px;
}

.hero-command {
  width: fit-content;
  max-width: 100%;
  margin-top: 36px;
}

.command-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted-2);
  font: 10px var(--mono);
  letter-spacing: 0.14em;
  font-weight: 600;
}

.command-line {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  color: var(--paper-2);
  background: rgba(10, 16, 26, 0.85);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.command-line code {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--blue);
  font-size: 12px;
}

.command-prompt {
  color: var(--signal);
  font: 14px var(--mono);
  font-weight: 700;
}

.copy-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px 5px 12px;
  border: 0;
  border-left: 1px solid var(--line-strong);
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font: 11px var(--mono);
  font-weight: 500;
  transition: all 0.2s;
  border-radius: 0 4px 4px 0;
}

.copy-button:hover {
  color: var(--signal);
  background: rgba(var(--signal-rgb), 0.08);
}

.copy-button.is-copied {
  color: var(--green);
}

.copy-button .check-icon {
  display: none;
  width: 13px;
  height: 13px;
}

.copy-button.is-copied .check-icon {
  display: inline-block;
}

.hero-support {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  color: var(--muted);
  font: 11px var(--mono);
}

.mini-led, .footer-led {
  width: 6px;
  height: 6px;
  display: inline-block;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.support-divider {
  width: 3px;
  height: 3px;
  display: inline-block;
  background: var(--muted-2);
  border-radius: 50%;
}

/* ==========================================================
   Hero Stage & Radar - Overlap-Free, Luminous Architecture
   ========================================================== */
.hero-stage {
  position: relative;
  min-height: 580px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: radial-gradient(circle at 50% 50%, rgba(var(--signal-rgb), 0.05) 0%, rgba(10, 16, 26, 0.95) 75%), #060a12;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6), inset 0 0 80px rgba(var(--signal-rgb), 0.04);
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.stage-grid {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(var(--signal-rgb), 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--signal-rgb), 0.08) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  pointer-events: none;
}

.stage-topline, .stage-footer {
  position: absolute;
  z-index: 10;
  left: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
}

.stage-topline {
  top: 18px;
}

.stage-coordinates b {
  color: var(--signal);
  padding: 0 6px;
}

/* Radar Center (Scaled, Centered, Non-Colliding) */
.stage-center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 320px;
  height: 320px;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 1;
}

.radar-ring {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(var(--signal-rgb), 0.22);
  border-radius: 50%;
  box-shadow: 0 0 30px rgba(var(--signal-rgb), 0.06);
}

.radar-ring::before, .radar-ring::after {
  content: "";
  position: absolute;
  inset: 16%;
  border: 1px solid rgba(var(--signal-rgb), 0.12);
  border-radius: 50%;
}

.radar-ring::after {
  inset: 32%;
}

.radar-ring-mid {
  inset: 48px;
  border: 1px dashed rgba(var(--signal-rgb), 0.3);
  border-radius: 50%;
  animation: ringSpin 35s linear infinite;
}

.radar-ring-inner {
  inset: 96px;
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: 50%;
  box-shadow: 0 0 40px rgba(56, 189, 248, 0.1), inset 0 0 25px rgba(56, 189, 248, 0.06);
}

.radar-sweep {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 12deg, transparent 0deg, transparent 290deg, rgba(var(--signal-rgb), 0.15) 325deg, rgba(var(--signal-rgb), 0.65) 356deg, transparent 360deg);
  animation: radarSpin 5s linear infinite;
  mix-blend-mode: screen;
}

.radar-crosshair {
  position: absolute;
  opacity: 0.25;
  background: var(--signal);
}

.radar-crosshair-x {
  width: 100%;
  height: 1px;
  top: 50%;
  left: 0;
}

.radar-crosshair-y {
  width: 1px;
  height: 100%;
  top: 0;
  left: 50%;
}

.radar-tick {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 10px var(--signal);
}

.tick-one { top: 18%; left: 20%; }
.tick-two { top: 28%; right: 14%; background: var(--blue); box-shadow: 0 0 10px var(--blue); }
.tick-three { bottom: 18%; left: 30%; background: var(--amber); box-shadow: 0 0 10px var(--amber); }
.tick-four { bottom: 30%; right: 20%; width: 4px; height: 4px; background: var(--green); box-shadow: 0 0 8px var(--green); }

.core-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 140px;
  height: 140px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--signal-rgb), 0.25) 0%, transparent 70%);
  filter: blur(25px);
  animation: coreBreath 3.5s ease-in-out infinite;
}

.core-lock {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 130px;
  height: 130px;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  pointer-events: none;
  z-index: 5;
}

.core-lock::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 98px;
  height: 98px;
  transform: translate(-50%, -50%) rotate(45deg);
  background: linear-gradient(145deg, #0d1e2e, #06111b);
  border: 1px solid var(--signal);
  border-radius: 12px;
  box-shadow: 0 0 0 6px rgba(var(--signal-rgb), 0.08), 0 0 35px rgba(var(--signal-rgb), 0.28), inset 0 0 20px rgba(var(--signal-rgb), 0.15);
  z-index: -2;
}

.core-lock::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 84px;
  height: 84px;
  transform: translate(-50%, -50%) rotate(45deg);
  border: 1px solid rgba(var(--signal-rgb), 0.25);
  border-radius: 8px;
  z-index: -1;
}

.core-sigil {
  width: 26px;
  height: 26px;
  color: var(--signal);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.core-sigil svg {
  width: 100%;
  height: 100%;
  display: block;
}

.core-lock strong {
  display: block;
  color: var(--signal);
  font: 700 11px var(--mono);
  letter-spacing: 0.14em;
  text-align: center;
  line-height: 1.1;
  margin: 0;
}

.core-lock span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font: 7.5px var(--mono);
  letter-spacing: 0.08em;
  text-align: center;
  line-height: 1.1;
}

/* Orbit Captions (Telemetry Chips) */
.orbit-caption {
  position: absolute;
  z-index: 6;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border-radius: 4px;
  background: rgba(9, 15, 25, 0.75);
  border: 1px solid var(--line);
  color: var(--muted);
  font: 9px var(--mono);
  letter-spacing: 0.08em;
  backdrop-filter: blur(8px);
}

.orbit-caption strong {
  margin-left: 2px;
  color: var(--paper);
  font-weight: 600;
}

.caption-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.green-dot { background: var(--green); box-shadow: 0 0 8px var(--green); }
.blue-dot { background: var(--blue); box-shadow: 0 0 8px var(--blue); }
.amber-dot { background: var(--amber); box-shadow: 0 0 8px var(--amber); }

/* Dedicated Quadrant Placement - NEVER Overlaps */
.orbit-caption-human {
  top: 58px;
  right: 22px;
}

.orbit-caption-agent {
  top: 50%;
  right: 22px;
  transform: translateY(-50%);
}

.orbit-caption-control {
  top: 50%;
  left: 22px;
  transform: translateY(-50%);
}

/* Stage Cards */
.stage-card {
  position: absolute;
  z-index: 6;
  width: 190px;
  padding: 14px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(10, 17, 27, 0.88);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(14px);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.stage-card:hover {
  transform: translateY(-2px);
}

.stage-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font: 8px var(--mono);
  letter-spacing: 0.1em;
}

.stage-card-head i {
  margin-left: auto;
  color: var(--muted-2);
  font-style: normal;
  font-weight: 600;
}

.card-node {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--paper);
  font: 9px var(--mono);
  font-weight: 700;
}

.stage-card strong {
  display: block;
  margin-top: 14px;
  color: var(--paper);
  font: 12px var(--mono);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.stage-card small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font: 10px var(--mono);
}

/* Quadrant Placement for Stage Cards */
.stage-card-human {
  top: 56px;
  left: 22px;
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45), 0 0 20px rgba(16, 185, 129, 0.08);
}

.stage-card-human .card-node {
  color: var(--green);
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.1);
}

.stage-card-agent {
  right: 22px;
  bottom: 54px;
  border-color: rgba(var(--signal-rgb), 0.4);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45), 0 0 20px rgba(var(--signal-rgb), 0.08);
}

.stage-card-agent .card-node {
  color: var(--signal);
  border-color: rgba(var(--signal-rgb), 0.4);
  background: rgba(var(--signal-rgb), 0.1);
}

.stage-card-policy {
  left: 22px;
  bottom: 54px;
  border-color: rgba(251, 191, 36, 0.4);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45), 0 0 20px rgba(251, 191, 36, 0.08);
}

.stage-card-policy .card-node {
  color: var(--amber);
  border-color: rgba(251, 191, 36, 0.4);
  background: rgba(251, 191, 36, 0.1);
}

.mini-bars {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 14px;
  margin-top: 12px;
}

.mini-bars i {
  display: block;
  width: 10px;
  background: var(--green);
  opacity: 0.85;
  border-radius: 1px;
}

.mini-bars i:nth-child(1) { height: 4px; }
.mini-bars i:nth-child(2) { height: 8px; }
.mini-bars i:nth-child(3) { height: 11px; }
.mini-bars i:nth-child(4) { height: 6px; }
.mini-bars i:nth-child(5) { height: 14px; }
.mini-bars i:nth-child(6) { height: 9px; }

.agent-bars i {
  background: var(--signal);
}

.stage-beam {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--signal-rgb), 0.5), transparent);
  animation: beam 4.5s ease-in-out infinite;
  pointer-events: none;
}

.stage-footer {
  bottom: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.stage-footer span {
  display: flex;
  align-items: center;
  gap: 7px;
}

.stage-footer b {
  color: var(--paper-2);
  font-weight: 500;
}

.footer-led.blue { background: var(--blue); box-shadow: 0 0 8px var(--blue); }
.footer-led.amber { background: var(--amber); box-shadow: 0 0 8px var(--amber); }

/* Principles Signal Strip */
.signal-strip {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(10, 16, 26, 0.8);
  backdrop-filter: blur(8px);
}

.signal-strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 36px;
  min-width: 980px;
  padding: 16px 0;
  color: var(--muted);
  font: 11px var(--mono);
  letter-spacing: 0.16em;
  white-space: nowrap;
}

.signal-strip-inner b {
  color: var(--signal);
  font-size: 13px;
  font-weight: 400;
  text-shadow: 0 0 10px rgba(var(--signal-rgb), 0.4);
}

/* ==========================================================
   Section 01: Premise & Projection Demo (Human vs Agent)
   ========================================================== */
.premise-section {
  padding: 120px 0 130px;
}

.premise-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  align-items: start;
  gap: 72px;
}

.premise-heading h2 {
  font-size: clamp(38px, 4.6vw, 64px);
}

.premise-heading p {
  max-width: 460px;
  margin: 28px 0 28px;
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.75;
}

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(var(--signal-rgb), 0.4);
  color: var(--signal);
  font: 12px var(--mono);
  font-weight: 600;
  transition: all 0.2s;
}

.arrow-link:hover {
  border-bottom-color: var(--signal);
  color: #ffffff;
}

.arrow-link span {
  font-size: 15px;
  transition: transform 0.2s;
}

.arrow-link:hover span {
  transform: translate(3px, 3px);
}

/* Projection Demo */
.projection-demo {
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(10, 16, 26, 0.95);
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  backdrop-filter: blur(16px);
  transition: border-color 0.3s;
}

.projection-head {
  display: flex;
  justify-content: space-between;
  padding: 14px 20px;
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
}

.projection-live {
  color: var(--signal);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.projection-live i {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal);
}

.projection-tabs {
  display: flex;
  gap: 20px;
  padding: 0 20px;
  background: rgba(7, 12, 20, 0.6);
  border-bottom: 1px solid var(--line);
}

.projection-tab {
  padding: 14px 4px 12px;
  position: relative;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: 12px var(--mono);
  font-weight: 600;
  transition: color 0.2s;
}

.projection-tab:hover {
  color: var(--paper);
}

.projection-tab.is-active {
  color: var(--paper);
}

.projection-tab.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--signal);
  box-shadow: 0 0 10px var(--signal);
}

.projection-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.projection-pane {
  min-height: 290px;
  padding: 22px 20px 20px;
  position: relative;
  transition: background 0.35s ease, opacity 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.projection-pane + .projection-pane {
  border-left: 1px solid var(--line);
}

.human-pane {
  background: linear-gradient(150deg, rgba(16, 185, 129, 0.08) 0%, rgba(7, 12, 20, 0.6) 65%);
}

.agent-pane {
  background: linear-gradient(150deg, rgba(var(--signal-rgb), 0.08) 0%, rgba(7, 12, 20, 0.6) 65%);
}

.pane-label {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.pane-label b {
  margin-left: auto;
  padding: 3px 7px;
  border: 1px solid;
  border-radius: 4px;
  font: 9px var(--mono);
  font-weight: 600;
}

.human-pane .pane-label b {
  color: var(--green);
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.12);
}

.agent-pane .pane-label b {
  color: var(--signal);
  border-color: rgba(var(--signal-rgb), 0.4);
  background: rgba(var(--signal-rgb), 0.12);
}

.pane-number {
  color: var(--paper-2);
  font-size: 12px;
  font-weight: 700;
}

.pane-title {
  margin: 22px 0 16px;
  font: 16px var(--mono);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.human-pane .pane-title {
  color: var(--green);
}

.agent-pane .pane-title {
  color: var(--signal);
}

.value-list {
  display: grid;
  gap: 10px;
}

.value-list > div {
  display: grid;
  grid-template-columns: 115px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font: 11px var(--mono);
}

.value-list span {
  color: var(--muted);
  font-weight: 500;
}

.value-list code {
  overflow: hidden;
  color: var(--paper-2);
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 11px;
}

.value-list i {
  font-style: normal;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 7px;
  border-radius: 4px;
}

.value-allow {
  color: var(--green);
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.value-fake {
  color: var(--signal);
  background: rgba(var(--signal-rgb), 0.15);
  border: 1px solid rgba(var(--signal-rgb), 0.4);
}

.value-deny {
  color: var(--red);
  background: rgba(248, 113, 113, 0.15);
  border: 1px solid rgba(248, 113, 113, 0.4);
}

.pane-foot {
  position: absolute;
  right: 20px;
  bottom: 18px;
  left: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font: 10px var(--mono);
}

.pane-led {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.pane-led.green { background: var(--green); box-shadow: 0 0 8px var(--green); }
.pane-led.blue { background: var(--signal); box-shadow: 0 0 8px var(--signal); }

.projection-caption {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.caption-line {
  width: 24px;
  height: 1px;
  background: var(--signal);
}

/* Tab Switching Visual Contrast */
.projection-demo.view-agent .agent-pane {
  background: linear-gradient(150deg, rgba(var(--signal-rgb), 0.14) 0%, rgba(10, 18, 30, 0.9) 70%);
  box-shadow: inset 0 0 40px rgba(var(--signal-rgb), 0.08);
}

.projection-demo.view-agent .human-pane {
  background: rgba(7, 12, 18, 0.6);
  opacity: 0.7;
}

.projection-demo.view-human .human-pane {
  background: linear-gradient(150deg, rgba(16, 185, 129, 0.14) 0%, rgba(10, 22, 24, 0.9) 70%);
  box-shadow: inset 0 0 40px rgba(16, 185, 129, 0.08);
}

.projection-demo.view-human .agent-pane {
  background: rgba(7, 12, 18, 0.6);
  opacity: 0.7;
}

.projection-demo.view-human .projection-caption {
  color: var(--green);
}

.projection-demo.view-human .caption-line {
  background: var(--green);
}

/* ==========================================================
   Section 02: The Boundary & Process Architecture Tree
   ========================================================== */
.boundary-section {
  padding: 120px 0 130px;
}

.boundary-intro {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  align-items: end;
  gap: 80px;
}

.boundary-summary p {
  max-width: 460px;
  margin: 0 0 24px;
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.75;
}

.boundary-tagline {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.12em;
  font-weight: 600;
}

.boundary-tagline span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal);
}

.architecture-wrap {
  display: grid;
  grid-template-columns: 1.22fr 0.78fr;
  gap: 24px;
  margin-top: 64px;
}

.architecture-diagram {
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(9, 15, 25, 0.9);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(16px);
  overflow: hidden;
}

.diagram-header {
  display: flex;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.diagram-header i {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal);
}

.diagram-layers {
  padding: 24px 20px;
}

.diagram-layer {
  position: relative;
  padding-left: 90px;
  min-height: 125px;
}

.layer-label {
  position: absolute;
  top: 8px;
  left: 0;
  color: var(--muted-2);
  font: 10px var(--mono);
  letter-spacing: 0.14em;
  font-weight: 700;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.layer-content {
  position: relative;
  border-left: 2px solid var(--line-strong);
  padding: 8px 0 8px 24px;
}

.process-node {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--body-text);
  font: 13px var(--mono);
  background: rgba(14, 22, 34, 0.8);
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.process-node.active-node {
  color: var(--paper);
  border-color: rgba(var(--signal-rgb), 0.5);
  background: rgba(var(--signal-rgb), 0.08);
  box-shadow: 0 0 20px rgba(var(--signal-rgb), 0.1);
}

.process-node small {
  color: var(--muted);
  font-size: 10px;
  margin-left: 4px;
}

.process-symbol {
  color: var(--signal);
  font-size: 16px;
}

.process-node i {
  width: 6px;
  height: 6px;
  margin-left: 6px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal);
  animation: pulseGlow 2s infinite ease-in-out;
}

.process-children {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-strong);
}

.process-children .process-symbol {
  color: var(--blue);
}

/* Boundary Line */
.boundary-line {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  margin: 16px 0;
  border-top: 1px dashed rgba(var(--signal-rgb), 0.5);
  border-bottom: 1px dashed rgba(var(--signal-rgb), 0.5);
  color: var(--signal);
  font: 10px var(--mono);
  letter-spacing: 0.16em;
  font-weight: 700;
  background: rgba(var(--signal-rgb), 0.03);
}

.boundary-line::before, .boundary-line::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 6px;
  height: 6px;
  transform: translateY(-50%) rotate(45deg);
  border: 1px solid var(--signal);
  background: var(--ink);
}

.boundary-line::before { left: 4px; }
.boundary-line::after { right: 4px; }

.control-plane .layer-content {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  border-left: 0;
  padding: 8px 0 0;
}

.control-pill {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(11, 18, 28, 0.7);
  color: var(--muted);
  font: 11px var(--mono);
}

.control-pill b {
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
}

.control-pill:nth-child(1) b { color: var(--signal); background: rgba(var(--signal-rgb), 0.1); }
.control-pill:nth-child(2) b { color: var(--blue); background: rgba(56, 189, 248, 0.1); }
.control-pill:nth-child(3) b { color: var(--amber); background: rgba(251, 191, 36, 0.1); }
.control-pill:nth-child(4) b { color: var(--green); background: rgba(16, 185, 129, 0.1); }

/* Interactive Session Simulator */
.session-sim {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(9, 16, 26, 0.95);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(16px);
}

.sim-top {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.sim-state {
  color: var(--signal);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sim-state i {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal);
}

.sim-title {
  margin-top: 32px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.sim-title em {
  display: block;
  color: var(--signal);
  font: italic 22px var(--serif);
}

.sim-command {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--terminal-bg);
  color: var(--muted);
  font: 12px var(--mono);
}

.sim-command > span:first-child {
  color: var(--signal);
  font-weight: 700;
}

.sim-command code {
  color: var(--blue);
  word-break: break-all;
}

.sim-caret {
  margin-left: auto;
  color: var(--signal);
  animation: blink 1s steps(2) infinite;
}

.sim-progress {
  margin-top: 26px;
}

.progress-track {
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
}

.progress-track span {
  display: block;
  width: 33%;
  height: 100%;
  background: linear-gradient(90deg, var(--signal), var(--blue));
  box-shadow: 0 0 12px var(--signal);
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1), background 0.4s ease;
}

.progress-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  color: var(--muted-2);
  font: 9px var(--mono);
  letter-spacing: 0.12em;
  font-weight: 600;
}

.progress-labels span.is-active {
  color: var(--signal);
  text-shadow: 0 0 8px rgba(var(--signal-rgb), 0.5);
}

.sim-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.sim-metrics span, .sim-metrics strong {
  display: block;
}

.sim-metrics span {
  color: var(--muted-2);
  font: 9px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.sim-metrics strong {
  margin-top: 6px;
  color: var(--signal);
  font: 20px var(--mono);
  font-weight: 700;
}

.sim-metrics small {
  color: var(--muted);
  font-size: 9px;
  font-weight: 400;
}

.sim-button {
  width: 100%;
  margin-top: 26px;
  padding: 13px;
  border: 1px solid var(--signal);
  border-radius: 6px;
  color: #040810;
  background: var(--signal);
  cursor: pointer;
  font: 12px var(--mono);
  font-weight: 700;
  box-shadow: 0 0 20px rgba(var(--signal-rgb), 0.3);
  transition: all 0.2s;
}

.sim-button:hover:not(:disabled) {
  transform: translateY(-2px);
  background: #38bdf8;
  border-color: #38bdf8;
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.4);
}

.sim-button:disabled {
  opacity: 0.8;
  cursor: wait;
}

.session-sim.running .sim-state {
  color: var(--blue);
}

.session-sim.running .sim-state i {
  background: var(--blue);
  box-shadow: 0 0 8px var(--blue);
}

.session-sim.complete .sim-state {
  color: var(--green);
}

.session-sim.complete .sim-state i {
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.session-sim.complete .progress-track span {
  background: linear-gradient(90deg, var(--signal), var(--green));
  box-shadow: 0 0 12px var(--green);
}

/* ==========================================================
   Section 03: The Control Plane Grid
   ========================================================== */
.control-section {
  padding: 120px 0 130px;
  background: rgba(8, 14, 22, 0.7);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.control-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 60px;
}

.control-heading p {
  max-width: 360px;
  margin: 0;
  color: var(--body-text);
  font-size: 15px;
  line-height: 1.75;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 64px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--line-strong);
  overflow: hidden;
}

.control-card {
  min-height: 275px;
  padding: 28px;
  position: relative;
  background: #09101a;
  transition: background 0.25s, transform 0.25s;
}

.control-card:hover {
  z-index: 1;
  background: #0f1928;
  transform: translateY(-2px);
}

.control-card-top {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.12em;
  font-weight: 600;
}

.control-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--signal);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: rgba(var(--signal-rgb), 0.08);
  font: 18px var(--mono);
}

.control-card:nth-child(2) .control-icon { color: var(--blue); background: rgba(56, 189, 248, 0.08); }
.control-card:nth-child(3) .control-icon { color: var(--amber); background: rgba(251, 191, 36, 0.08); }
.control-card:nth-child(4) .control-icon { color: var(--green); background: rgba(16, 185, 129, 0.08); }
.control-card:nth-child(5) .control-icon { color: var(--red); background: rgba(248, 113, 113, 0.08); }
.control-card:nth-child(6) .control-icon { color: var(--signal); background: rgba(var(--signal-rgb), 0.08); }

.control-card-top i {
  margin-left: auto;
  color: var(--muted-2);
  font-size: 14px;
  font-style: normal;
}

.control-card h3 {
  margin: 32px 0 12px;
  font-size: 21px;
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.control-card h3 span {
  color: var(--signal);
  font: italic 21px var(--serif);
}

.control-card:nth-child(2) h3 span { color: var(--blue); }
.control-card:nth-child(3) h3 span { color: var(--amber); }
.control-card:nth-child(4) h3 span { color: var(--green); }
.control-card:nth-child(5) h3 span { color: var(--red); }
.control-card:nth-child(6) h3 span { color: var(--signal); }

.control-card p {
  max-width: 280px;
  margin-bottom: 0;
  color: var(--body-text);
  font-size: 13px;
  line-height: 1.7;
}

.control-foot {
  position: absolute;
  right: 28px;
  bottom: 22px;
  left: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.control-foot b {
  color: var(--signal);
  font-weight: 600;
}

.control-card:nth-child(2) .control-foot b,
.control-card:nth-child(6) .control-foot b { color: var(--blue); }
.control-card:nth-child(3) .control-foot b { color: var(--amber); }
.control-card:nth-child(4) .control-foot b { color: var(--green); }
.control-card:nth-child(5) .control-foot b { color: var(--red); }

/* ==========================================================
   Section 04: Policy Lab & Inspector
   ========================================================== */
.policy-section {
  padding: 120px 0 130px;
}

.policy-heading {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  align-items: end;
  gap: 80px;
}

.policy-lab {
  margin-top: 64px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(9, 15, 25, 0.95);
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  backdrop-filter: blur(16px);
}

.policy-tabbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 12, 20, 0.7);
  overflow-x: auto;
}

.tabbar-label {
  color: var(--muted-2);
  font: 10px var(--mono);
  letter-spacing: 0.14em;
  font-weight: 700;
}

.tabbar-spacer {
  flex: 1;
}

.policy-tab {
  position: relative;
  padding: 16px 6px 14px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: 12px var(--mono);
  font-weight: 600;
  white-space: nowrap;
  transition: color 0.2s;
}

.policy-tab:hover {
  color: var(--paper);
}

.policy-tab.is-active {
  color: var(--paper);
}

.policy-tab.is-active::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--signal);
  box-shadow: 0 0 10px var(--signal);
}

.policy-terminal-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 10px var(--mono);
}

.policy-terminal-head > span:first-child {
  display: flex;
  gap: 6px;
}

.terminal-led {
  width: 8px;
  height: 8px;
  display: inline-block;
  border-radius: 50%;
}

.terminal-led.green { background: #10b981; }
.terminal-led.amber { background: #fbbf24; }
.terminal-led.blue { background: #38bdf8; }

.policy-terminal-head > span:last-child {
  margin-left: auto;
  color: var(--signal);
  font-size: 10px;
  font-weight: 600;
}

.policy-body {
  padding: 26px 28px 28px;
}

.policy-command {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 13px var(--mono);
}

.policy-command span:first-child {
  color: var(--blue);
}

.policy-command b {
  color: var(--muted-2);
  font-weight: 400;
}

.policy-command strong {
  color: var(--paper);
  font-weight: 500;
}

.policy-command em {
  color: var(--signal);
  font-style: normal;
  font-weight: 600;
}

.policy-result-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0 16px;
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.12em;
  font-weight: 600;
}

.policy-result-head b {
  color: var(--signal);
  font-weight: 600;
}

.policy-results {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.policy-result {
  min-height: 96px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 16px;
  border-radius: 6px;
  background: rgba(14, 22, 34, 0.7);
  border: 1px solid var(--line);
}

.policy-result span {
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.policy-result strong {
  font: 16px var(--mono);
  font-weight: 700;
}

.policy-result i {
  color: var(--muted-2);
  font: 10px var(--mono);
  font-style: normal;
}

.blue-text { color: var(--signal); }
.amber-text { color: var(--amber); }
.red-text { color: var(--red); }
.green-text { color: var(--green); }

.policy-explanation {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--body-text);
  font-size: 14px;
  line-height: 1.7;
}

/* ==========================================================
   Section 05: SHB Doctor Posture Dashboard
   ========================================================== */
.proof-section {
  padding: 120px 0 130px;
  background: rgba(8, 14, 22, 0.7);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.proof-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  align-items: center;
  gap: 72px;
}

.proof-copy p {
  max-width: 440px;
  margin: 26px 0 28px;
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.75;
}

.proof-dashboard {
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(9, 15, 25, 0.95);
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(16px);
  overflow: hidden;
}

.dashboard-top {
  display: flex;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.dashboard-pass {
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.dashboard-pass i {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.doctor-score {
  display: flex;
  align-items: center;
  gap: 26px;
  padding: 26px 24px;
  border-bottom: 1px solid var(--line);
}

.score-ring {
  position: relative;
  width: 90px;
  height: 90px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border: 2px solid var(--signal);
  border-radius: 50%;
  color: var(--signal);
  box-shadow: 0 0 0 8px rgba(var(--signal-rgb), 0.08), inset 0 0 25px rgba(var(--signal-rgb), 0.15);
}

.score-ring::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px dashed rgba(var(--signal-rgb), 0.45);
  border-radius: 50%;
  animation: ringSpin 18s linear infinite;
}

.score-ring span {
  position: relative;
  z-index: 1;
  font: 28px var(--mono);
  font-weight: 700;
}

.score-ring small {
  position: absolute;
  bottom: 16px;
  font: 8px var(--mono);
  letter-spacing: 0.12em;
  font-weight: 600;
  color: var(--muted);
}

.doctor-score strong {
  display: block;
  font-size: 20px;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.doctor-score p {
  max-width: 320px;
  margin: 8px 0 0;
  color: var(--body-text);
  font-size: 13px;
  line-height: 1.6;
}

.outcome-list {
  padding: 6px 24px;
}

.outcome-list > div {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  border-bottom: 1px solid var(--line);
  color: var(--paper-2);
  font: 12px var(--mono);
}

.outcome-list > div:last-child {
  border-bottom: 0;
}

.outcome-list b {
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}

.outcome-mark {
  font-size: 14px;
  font-weight: 700;
}

.outcome-mark.pass { color: var(--green); }
.outcome-mark.limited { color: var(--amber); }
.outcome-mark.pending { color: var(--muted); }

.outcome-list > div:nth-child(1) b,
.outcome-list > div:nth-child(2) b {
  color: var(--green);
  background: rgba(16, 185, 129, 0.12);
}

.outcome-list > div:nth-child(3) b {
  color: var(--amber);
  background: rgba(251, 191, 36, 0.12);
}

.outcome-list > div:nth-child(4) b {
  color: var(--muted);
  background: rgba(255, 255, 255, 0.05);
}

.dashboard-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: rgba(7, 12, 20, 0.7);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 11px var(--mono);
  letter-spacing: 0.08em;
}

.dashboard-footer code {
  color: var(--signal);
  font-weight: 600;
}

/* ==========================================================
   Section 06: Install Console
   ========================================================== */
.install-section {
  padding: 120px 0 130px;
  position: relative;
  overflow: hidden;
}

.install-aura {
  position: absolute;
  width: 750px;
  height: 750px;
  top: -300px;
  right: -150px;
  border: 1px solid rgba(var(--signal-rgb), 0.12);
  border-radius: 50%;
  box-shadow: 0 0 0 50px rgba(var(--signal-rgb), 0.02), 0 0 0 100px rgba(var(--signal-rgb), 0.01);
  pointer-events: none;
}

.install-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  align-items: center;
  gap: 72px;
}

.install-copy p {
  max-width: 440px;
  margin: 26px 0 24px;
  color: var(--body-text);
  font-size: 16px;
  line-height: 1.75;
}

.install-note {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font: 11px var(--mono);
}

.install-note span:first-child {
  color: var(--signal);
  font-size: 18px;
}

.install-console {
  padding: 24px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(9, 15, 25, 0.95);
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(16px);
}

.install-tabbar {
  display: flex;
  gap: 20px;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
}

.install-tab {
  position: relative;
  padding: 10px 4px 14px;
  border: 0;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font: 11px var(--mono);
  font-weight: 600;
  white-space: nowrap;
  transition: color 0.2s;
}

.install-tab:hover {
  color: var(--paper);
}

.install-tab.is-active {
  color: var(--paper);
}

.install-tab.is-active::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--signal);
  box-shadow: 0 0 10px var(--signal);
}

.install-terminal {
  margin-top: 20px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--terminal-bg);
  overflow: hidden;
}

.install-terminal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.install-copy {
  border: 0;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
}

.install-terminal pre {
  margin: 0;
  padding: 20px 18px;
  color: var(--signal);
  font: 13px var(--mono);
  line-height: 1.9;
  white-space: pre-wrap;
  word-break: break-all;
}

.launch-after {
  margin-top: 22px;
}

.launch-after > span {
  color: var(--muted-2);
  font: 10px var(--mono);
  letter-spacing: 0.12em;
  font-weight: 600;
}

.launch-after > div {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.launch-after code {
  padding: 5px 10px;
  color: var(--blue);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 4px;
  font: 11px var(--mono);
}

.install-caution {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  color: var(--muted);
  font: 11px var(--mono);
}

.install-caution > span:first-child {
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border: 1px solid var(--amber);
  color: var(--amber);
  border-radius: 50%;
  font-weight: 700;
}

.install-caution code {
  color: var(--amber);
}

.install-caution-terminal {
  align-items: flex-start;
  background: rgba(74, 158, 255, 0.05);
  border: 1px solid rgba(74, 158, 255, 0.25);
  border-radius: 6px;
  padding: 10px 14px;
  color: var(--text);
}

.install-caution-terminal > span:first-child {
  border-color: rgba(74, 158, 255, 0.6);
  color: rgba(74, 158, 255, 0.9);
  flex-shrink: 0;
  margin-top: 1px;
}

.install-caution-terminal code {
  color: rgba(74, 158, 255, 0.9);
}

/* ==========================================================
   Section 07: FAQ Section
   ========================================================== */
.faq-section {
  padding: 120px 0 130px;
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 80px;
}

.faq-heading p {
  max-width: 420px;
  margin: 26px 0 0;
  color: var(--body-text);
  font-size: 15px;
  line-height: 1.75;
}

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

.faq-list details {
  border-bottom: 1px solid var(--line);
  transition: background 0.2s;
}

.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  list-style: none;
  padding: 22px 0;
  color: var(--paper);
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary code {
  color: var(--blue);
}

.faq-list summary .faq-question {
  flex: 1;
  min-width: 0;
}

.faq-list summary .faq-toggle {
  flex-shrink: 0;
  color: var(--signal);
  font: 22px/1 var(--mono);
  font-weight: 400;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-list details[open] summary .faq-toggle {
  transform: rotate(45deg);
}

.faq-list details p {
  max-width: 620px;
  margin: 0 0 24px;
  color: var(--body-text);
  font-size: 14px;
  line-height: 1.8;
}

.faq-list details p strong {
  color: var(--paper);
  font-weight: 600;
}

.faq-list details pre {
  margin: 8px 0 20px;
  padding: 14px 16px;
  background: var(--surface, rgba(255,255,255,0.04));
  border: 1px solid var(--line, rgba(255,255,255,0.08));
  border-radius: 6px;
  overflow-x: auto;
}

.faq-list details pre code {
  font: 13px/1.7 var(--mono);
  color: var(--paper, #e8e8e8);
}

/* Site Footer */
.site-footer {
  position: relative;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(ellipse 80% 120% at 50% -40%, rgba(var(--signal-rgb), 0.07), transparent 62%),
    #04070c;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 2fr);
  align-items: start;
  gap: 56px;
  padding: 68px 0 52px;
}

.footer-brand .brand {
  color: var(--paper);
}

.footer-tagline {
  margin: 22px 0 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.footer-desc {
  margin: 14px 0 0;
  max-width: 340px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.footer-actions {
  display: flex;
  gap: 10px;
  margin-top: 24px;
}

.footer-icon-link {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.footer-icon-link:hover {
  color: var(--signal);
  border-color: var(--line-glow);
  background: rgba(var(--signal-rgb), 0.08);
  transform: translateY(-2px);
}

.footer-icon-link svg {
  width: 17px;
  height: 17px;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.footer-col-title {
  margin-bottom: 3px;
  color: var(--paper-2);
  font: 600 10px var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.footer-col a {
  width: fit-content;
  color: var(--muted);
  font-size: 13px;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--signal);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  color: var(--muted-2);
  font: 11px var(--mono);
  letter-spacing: 0.04em;
}

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-status i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

/* ==========================================================
   Reliable Reveal System - Progressive Enhancement
   ========================================================== */
/* By default, elements are completely visible (progressive enhancement) */
.reveal {
  opacity: 1;
  transform: none;
}

/* Smooth reveal animation when JS is present */
@media (prefers-reduced-motion: no-preference) {
  html.js-ready .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1), transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
  }

  html.js-ready .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
  }

  .reveal-delay-1 { transition-delay: 0.08s; }
  .reveal-delay-2 { transition-delay: 0.16s; }
  .reveal-delay-3 { transition-delay: 0.24s; }
}

/* Keyframes */
@keyframes radarSpin {
  to { transform: rotate(360deg); }
}

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

@keyframes coreBreath {
  0%, 100% { transform: translate(-50%, -50%) scale(0.92); opacity: 0.7; }
  50% { transform: translate(-50%, -50%) scale(1.08); opacity: 1; }
}

@keyframes beam {
  0%, 100% { transform: translateY(-100px); opacity: 0; }
  35%, 65% { opacity: 0.9; }
  50% { transform: translateY(100px); }
}

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

@keyframes pulseGlow {
  0%, 100% { opacity: 0.8; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

/* ==========================================================
   Responsive Breakpoints: 1024px, 768px, 640px, 480px, 390px
   ========================================================== */

/* Tablet Landscape / Laptops (<= 1024px) */
@media (max-width: 1024px) {
  .site-header {
    width: min(100% - 48px, 920px);
  }

  .section-shell {
    width: min(100% - 48px, 920px);
  }

  .desktop-nav, .header-meta {
    display: none;
  }

  .menu-toggle {
    width: 44px;
    height: 44px;
    display: grid;
    place-content: center;
    gap: 6px;
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
    z-index: 50;
  }

  .menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--paper);
    border-radius: 2px;
    transition: transform 0.25s, opacity 0.25s;
  }

  .menu-toggle.is-open span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .menu-toggle.is-open span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  .mobile-menu {
    position: fixed;
    top: 80px;
    right: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    padding: 16px 24px 24px;
    background: rgba(6, 10, 16, 0.96);
    border-bottom: 1px solid var(--line-strong);
    backdrop-filter: blur(20px);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-12px);
    transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1), transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.25s;
    z-index: 45;
  }

  .mobile-menu.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .mobile-menu a {
    display: flex;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    color: var(--paper-2);
    font-size: 15px;
    font-weight: 500;
  }

  .mobile-menu a:hover {
    color: var(--signal);
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 60px 0 70px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero h1 {
    font-size: clamp(52px, 9vw, 84px);
  }

  .hero-stage {
    min-height: 560px;
  }

  .premise-layout,
  .architecture-wrap,
  .proof-layout,
  .install-layout,
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 52px;
  }

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

  .boundary-intro, .policy-heading {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* Tablet Portrait (<= 768px) */
@media (max-width: 768px) {
  .site-header, .section-shell {
    width: min(100% - 40px, 680px);
  }

  .premise-section,
  .boundary-section,
  .control-section,
  .policy-section,
  .proof-section,
  .install-section,
  .faq-section {
    padding: 90px 0 100px;
  }

  .hero-actions {
    flex-wrap: wrap;
    gap: 16px;
  }

  .hero-stage {
    min-height: 520px;
  }

  .stage-center {
    width: 270px;
    height: 270px;
  }

  .core-lock {
    width: 110px;
    height: 110px;
  }

  .core-lock::before {
    width: 78px;
    height: 78px;
    border-radius: 10px;
  }

  .core-lock::after {
    width: 66px;
    height: 66px;
    border-radius: 7px;
  }

  .stage-card {
    width: 165px;
    padding: 12px;
  }

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

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

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 44px;
    padding: 52px 0 40px;
  }

  .footer-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }
}

/* Mobile Screens (<= 640px) */
@media (max-width: 640px) {
  .site-header, .section-shell {
    width: calc(100% - 32px);
  }

  .site-header {
    height: 70px;
  }

  .hero {
    padding: 40px 0 54px;
    gap: 36px;
  }

  .hero h1 {
    font-size: clamp(42px, 12vw, 64px);
    margin: 16px 0 18px;
  }

  .hero-lede {
    font-size: 15px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .command-line {
    padding: 10px 12px;
  }

  .command-line code {
    font-size: 11px;
  }

  /* Refined Mobile Hero Stage */
  .hero-stage {
    min-height: 510px;
    margin: 0;
    border-radius: 8px;
  }

  .stage-topline, .stage-footer {
    left: 14px;
    right: 14px;
    font-size: 9px;
  }

  .stage-coordinates {
    display: none;
  }

  .stage-center {
    width: 230px;
    height: 230px;
  }

  .radar-ring-mid { inset: 32px; }
  .radar-ring-inner { inset: 68px; }

  .core-lock {
    width: 96px;
    height: 96px;
  }

  .core-lock::before {
    width: 68px;
    height: 68px;
    border-radius: 8px;
  }

  .core-lock::after {
    width: 56px;
    height: 56px;
    border-radius: 6px;
  }

  .core-sigil {
    width: 24px;
    height: 24px;
    margin-bottom: 3px;
  }

  .core-lock strong {
    font-size: 9px;
  }

  .core-lock span {
    font-size: 7px;
  }

  /* Card layout adjustments on mobile: well-proportioned corners */
  .stage-card {
    width: 142px;
    padding: 10px;
  }

  .stage-card strong {
    font-size: 10px;
    margin-top: 10px;
  }

  .stage-card small {
    font-size: 8px;
  }

  .stage-card-human {
    top: 48px;
    left: 12px;
    width: 140px;
  }

  .stage-card-agent {
    right: 12px;
    bottom: 48px;
    width: 140px;
  }

  .stage-card-policy {
    display: none;
  }

  .orbit-caption {
    display: none;
  }

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

  .projection-pane + .projection-pane {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .value-list > div {
    grid-template-columns: 100px 1fr auto;
    font-size: 10px;
  }

  .diagram-layers {
    padding: 18px 12px;
  }

  .diagram-layer {
    padding-left: 54px;
  }

  .layer-label {
    font-size: 8px;
  }

  .layer-content {
    padding-left: 14px;
  }

  .process-node {
    font-size: 11px;
    padding: 6px 10px;
  }

  .control-plane .layer-content {
    grid-template-columns: 1fr;
  }

  .policy-body {
    padding: 18px 14px;
  }

  .policy-command {
    font-size: 11px;
    flex-wrap: wrap;
  }

  .policy-results {
    grid-template-columns: 1fr;
  }

  .doctor-score {
    padding: 20px 16px;
    gap: 16px;
  }

  .score-ring {
    width: 74px;
    height: 74px;
  }

  .score-ring span {
    font-size: 22px;
  }

  .outcome-list {
    padding: 4px 16px;
  }

  .dashboard-footer {
    padding: 12px 16px;
    font-size: 9px;
  }

  .install-console {
    padding: 18px 14px;
  }

  .install-terminal pre {
    padding: 14px 12px;
    font-size: 11px;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 20px;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

/* Small Handsets (390px and below) */
@media (max-width: 390px) {
  .site-header, .section-shell {
    width: calc(100% - 24px);
  }

  .brand-name {
    font-size: 17px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .stage-card {
    width: 130px;
    padding: 8px;
  }

  .stage-center {
    width: 190px;
    height: 190px;
  }

  .orbit-caption {
    display: none;
  }

  .value-list > div {
    grid-template-columns: 90px 1fr auto;
    gap: 6px;
  }

  .sim-metrics {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .radar-sweep,
  .radar-ring-mid,
  .core-glow,
  .stage-beam,
  .score-ring::before,
  .sim-caret,
  .header-live i,
  .process-node i {
    animation: none !important;
  }
}

/* ==========================================================
   Contact Page
   ========================================================== */
.contact-section {
  position: relative;
  padding: 110px 0 120px;
}

.contact-layout {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.contact-intro .section-kicker {
  margin-bottom: 18px;
}

.contact-intro h1 {
  margin: 0 0 20px;
  font-size: clamp(40px, 5vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--paper);
  font-weight: 700;
}

.contact-intro h1 em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  color: var(--signal);
}

.contact-lede {
  max-width: 46ch;
  margin: 0;
  font-size: 17px;
  line-height: 1.65;
  color: var(--body-text);
}

.contact-alt {
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.contact-alt-label {
  display: block;
  font: 11px var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 12px;
}

.contact-alt-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.contact-alt-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font: 12px var(--mono);
  color: var(--body-text);
  text-decoration: none;
  transition: all 0.2s ease;
}

.contact-alt-links a:hover {
  color: var(--signal);
  border-color: rgba(var(--signal-rgb), 0.45);
}

.contact-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 26px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--signal);
  border-radius: 8px;
  background: rgba(var(--signal-rgb), 0.05);
}

.contact-note span:last-child {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted);
}

.contact-note span:first-child {
  color: var(--signal);
  font-size: 14px;
}

.contact-form-wrap {
  position: relative;
}

.contact-form {
  display: grid;
  gap: 22px;
  padding: 42px 40px 40px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(12px);
}

.contact-form::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 14px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(var(--signal-rgb), 0.35), transparent 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

.contact-field {
  display: grid;
  gap: 9px;
}

.contact-field label {
  font: 11px var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-field input,
.contact-field textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--terminal-bg);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--paper);
  font: 14px/1.55 var(--display);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-field textarea {
  resize: vertical;
  min-height: 150px;
}

.contact-field input::placeholder,
.contact-field textarea::placeholder {
  color: var(--muted-2);
}

.contact-field input:focus-visible,
.contact-field textarea:focus-visible {
  border-color: var(--signal);
  box-shadow: 0 0 0 3px rgba(var(--signal-rgb), 0.18), 0 0 18px rgba(var(--signal-rgb), 0.15);
}

.contact-submit {
  width: 100%;
  margin-top: 4px;
}

.contact-success {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
  padding: 18px 20px;
  border: 1px solid rgba(var(--signal-rgb), 0.4);
  border-radius: 10px;
  background: rgba(var(--signal-rgb), 0.08);
  color: var(--paper);
}

.contact-success[hidden] {
  display: none;
}

.contact-success-dot {
  flex-shrink: 0;
  margin-top: 4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 10px var(--signal);
}

.contact-success strong {
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
}

.contact-success div > span {
  font-size: 13px;
  color: var(--body-text);
}

@media (max-width: 960px) {
  .contact-section {
    padding: 80px 0 90px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 44px;
    align-items: stretch;
  }
}

@media (max-width: 560px) {
  .contact-form {
    padding: 30px 22px 28px;
  }

  .contact-intro h1 {
    font-size: 38px;
  }
}