/* ==========================================================================
   GRAVITAS // Principles of Anti-Gravity Template
   Theme: Anti-Gravity Aesthetics (Weightlessness, Levitation, Quantum Dynamics)
   Framework: Bootstrap 5 + Custom Futuristic CSS
   ========================================================================== */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Orbitron:wght@400;600;700;800;900&family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Color Palette */
  --bg-dark: #040711;
  --bg-deep: #070d20;
  --bg-card: rgba(10, 19, 44, 0.65);
  --bg-card-hover: rgba(16, 28, 64, 0.85);
  --bg-glass: rgba(7, 13, 32, 0.75);
  --bg-glass-border: rgba(0, 240, 255, 0.18);

  /* Accents */
  --cyan: #00f0ff;
  --cyan-glow: rgba(0, 240, 255, 0.45);
  --cyan-subtle: rgba(0, 240, 255, 0.08);
  --violet: #8e2de2;
  --violet-glow: rgba(142, 45, 226, 0.4);
  --emerald: #00ffa3;
  --emerald-glow: rgba(0, 255, 163, 0.4);
  --rose: #ff2a85;
  --amber: #ffaa00;

  /* Typography */
  --font-display: 'Orbitron', -apple-system, sans-serif;
  --font-heading: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Text Colors */
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* Shadows and Glows */
  --glow-sm: 0 0 15px var(--cyan-glow);
  --glow-md: 0 0 30px var(--cyan-glow);
  --glow-lg: 0 0 50px var(--cyan-glow);
  --glow-violet: 0 0 30px var(--violet-glow);

  /* Levitation & Float Variables */
  --float-drift: -18px;
  --float-duration: 6s;
  --gravity-multiplier: 1;
}

/* Gravity Modes Applied to Body */
body.gravity-zero {
  --float-drift: -28px;
  --float-duration: 8s;
  --gravity-multiplier: 0;
}

body.gravity-lunar {
  --float-drift: -12px;
  --float-duration: 7s;
  --gravity-multiplier: 0.16;
}

body.gravity-anti {
  --float-drift: -40px;
  --float-duration: 4.5s;
  --gravity-multiplier: -1;
}

body.gravity-quantum {
  --float-drift: -22px;
  --float-duration: 3.5s;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  transition: background-color 0.8s ease;
}

/* Custom Selection */
::selection {
  background: var(--cyan);
  color: var(--bg-dark);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: rgba(0, 240, 255, 0.25);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

/* Ambient Background Canvas */
#ambient-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
}

/* Radial Cosmic Backdrop Glow */
.cosmic-nebula {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 25%, rgba(0, 240, 255, 0.07) 0%, transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(142, 45, 226, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(0, 255, 163, 0.04) 0%, transparent 45%);
}

/* Grid Overlay with Perspective */
.grid-floor {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 40vh;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(to top, rgba(0, 240, 255, 0.05) 1px, transparent 1px),
              linear-gradient(to right, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 100%);
  -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 100%);
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6, .font-display {
  font-family: var(--font-display);
  letter-spacing: 0.04em;
  color: #ffffff;
  font-weight: 700;
}

.font-heading {
  font-family: var(--font-heading);
}

.font-mono {
  font-family: var(--font-mono);
}

.gradient-text-cyan {
  background: linear-gradient(135deg, #ffffff 0%, var(--cyan) 60%, #0099ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-violet {
  background: linear-gradient(135deg, var(--cyan) 0%, #b388ff 50%, var(--violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-gold {
  background: linear-gradient(135deg, #ffffff 0%, var(--emerald) 50%, #00d2ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--cyan);
  padding: 0.35rem 0.85rem;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: 999px;
  backdrop-filter: blur(10px);
}

.eyebrow .pulse-dot {
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse-dot 1.8s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.7); }
}

/* ==========================================================================
   Floating & Levitation Keyframes
   ========================================================================== */
.levitate-slow {
  animation: levitate-drift var(--float-duration) ease-in-out infinite alternate;
}

.levitate-medium {
  animation: levitate-drift calc(var(--float-duration) * 0.75) ease-in-out infinite alternate;
  animation-delay: -1.5s;
}

.levitate-fast {
  animation: levitate-drift calc(var(--float-duration) * 0.5) ease-in-out infinite alternate;
  animation-delay: -3s;
}

.levitate-rotate {
  animation: levitate-drift-rot var(--float-duration) ease-in-out infinite alternate;
}

@keyframes levitate-drift {
  0% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(calc(var(--float-drift) * 0.6)) rotate(0.4deg);
  }
  100% {
    transform: translateY(var(--float-drift)) rotate(-0.4deg);
  }
}

@keyframes levitate-drift-rot {
  0% {
    transform: translateY(0px) rotate(0deg) scale(1);
  }
  100% {
    transform: translateY(var(--float-drift)) rotate(2deg) scale(1.02);
  }
}

body.gravity-anti .levitate-slow,
body.gravity-anti .levitate-medium,
body.gravity-anti .levitate-fast {
  box-shadow: 0 -15px 35px rgba(0, 240, 255, 0.25);
  border-color: rgba(0, 240, 255, 0.5);
}

/* ==========================================================================
   Navigation Bar (Floating Island)
   ========================================================================== */
.navbar-custom {
  position: fixed;
  top: 18px;
  left: 0;
  right: 0;
  z-index: 1030;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-container-pill {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--bg-glass-border);
  border-radius: 100px;
  padding: 0.6rem 1.6rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.navbar-custom.scrolled .nav-container-pill {
  border-color: rgba(0, 240, 255, 0.35);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.8), 0 0 20px rgba(0, 240, 255, 0.15);
}

.navbar-brand-custom {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-icon {
  width: 36px;
  height: 36px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-ring {
  position: absolute;
  inset: 0;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 5s linear infinite;
  box-shadow: 0 0 10px var(--cyan);
}

.brand-ring-inner {
  position: absolute;
  inset: 5px;
  border: 1.5px dashed var(--violet);
  border-radius: 50%;
  animation: spin-rev 8s linear infinite;
}

.brand-dot {
  width: 8px;
  height: 8px;
  background: #ffffff;
  border-radius: 50%;
  box-shadow: 0 0 8px #ffffff, 0 0 15px var(--cyan);
}

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

@keyframes spin-rev {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

.brand-text-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #ffffff;
}

.brand-text-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: var(--cyan);
  display: block;
  margin-top: -3px;
}

.nav-link-custom {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  transition: all 0.25s ease;
  position: relative;
}

.nav-link-custom:hover {
  color: #ffffff;
  background: rgba(0, 240, 255, 0.08);
  text-shadow: 0 0 10px var(--cyan);
}

.nav-link-custom.active {
  color: var(--cyan);
  background: rgba(0, 240, 255, 0.12);
}

/* ==========================================================================
   Buttons & Interactive Elements
   ========================================================================== */
.btn-gravitas {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.75rem 1.6rem;
  border-radius: 999px;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  border: none;
  z-index: 1;
}

.btn-gravitas-primary {
  background: linear-gradient(135deg, #00f0ff 0%, #0084ff 100%);
  color: #040711;
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-gravitas-primary:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 30px rgba(0, 240, 255, 0.65), 0 0 40px rgba(0, 240, 255, 0.4);
  color: #040711;
}

.btn-gravitas-outline {
  background: rgba(10, 19, 44, 0.4);
  color: #ffffff;
  border: 1px solid rgba(0, 240, 255, 0.3);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.btn-gravitas-outline:hover {
  border-color: var(--cyan);
  background: rgba(0, 240, 255, 0.12);
  color: var(--cyan);
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 240, 255, 0.25);
}

.btn-gravitas-glow {
  background: rgba(142, 45, 226, 0.2);
  color: #ffffff;
  border: 1px solid rgba(142, 45, 226, 0.4);
}

.btn-gravitas-glow:hover {
  background: rgba(142, 45, 226, 0.35);
  border-color: var(--violet);
  box-shadow: 0 0 25px var(--violet-glow);
  transform: translateY(-3px);
  color: #ffffff;
}

/* ==========================================================================
   Hero Section & Quantum Core Visual
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 130px;
  padding-bottom: 60px;
  overflow: hidden;
}

.hero-stats-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(0, 240, 255, 0.05);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 999px;
  padding: 0.4rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--cyan);
  backdrop-filter: blur(12px);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 580px;
  margin-bottom: 2.2rem;
  line-height: 1.7;
}

.hero-telemetry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.5rem;
}

.telemetry-item {
  font-family: var(--font-mono);
}

.telemetry-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  margin-bottom: 0.2rem;
}

.telemetry-val {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  font-family: var(--font-display);
}

.telemetry-val.cyan { color: var(--cyan); }
.telemetry-val.emerald { color: var(--emerald); }
.telemetry-val.rose { color: var(--rose); }

/* ==========================================================================
   CSS 3D Quantum Levitation Core (Hero Centerpiece)
   ========================================================================== */
.levitation-stage {
  position: relative;
  width: 100%;
  height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
}

.quantum-core-wrapper {
  position: relative;
  width: 320px;
  height: 320px;
  transform-style: preserve-3d;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quantum-ring {
  position: absolute;
  border-radius: 50%;
  transform-style: preserve-3d;
  pointer-events: none;
}

.ring-outer {
  width: 300px;
  height: 300px;
  border: 2px solid rgba(0, 240, 255, 0.4);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.3), inset 0 0 20px rgba(0, 240, 255, 0.15);
  animation: rotate-x 12s linear infinite;
}

.ring-middle {
  width: 240px;
  height: 240px;
  border: 2px dashed rgba(142, 45, 226, 0.6);
  box-shadow: 0 0 20px rgba(142, 45, 226, 0.35);
  animation: rotate-y 9s linear infinite reverse;
}

.ring-inner {
  width: 180px;
  height: 180px;
  border: 2px solid rgba(0, 255, 163, 0.5);
  box-shadow: 0 0 25px rgba(0, 255, 163, 0.3);
  animation: rotate-z 7s linear infinite;
}

.levitating-orb {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #ffffff 0%, var(--cyan) 40%, #0044aa 85%, #001133 100%);
  box-shadow:
    0 0 40px var(--cyan),
    0 0 80px rgba(0, 240, 255, 0.5),
    inset -5px -5px 15px rgba(0, 0, 0, 0.8),
    inset 5px 5px 12px rgba(255, 255, 255, 0.8);
  animation: float-orb 4s ease-in-out infinite alternate;
  position: relative;
  z-index: 5;
}

.levitating-orb::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 110px;
  height: 110px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.4);
  animation: pulse-aura 2.5s ease-in-out infinite;
}

.levitation-shadow {
  position: absolute;
  bottom: 30px;
  width: 140px;
  height: 24px;
  background: radial-gradient(ellipse at center, rgba(0, 240, 255, 0.35) 0%, rgba(0, 0, 0, 0.7) 50%, transparent 80%);
  border-radius: 50%;
  filter: blur(6px);
  animation: shadow-breathe 4s ease-in-out infinite alternate;
}

.hud-node {
  position: absolute;
  background: rgba(10, 20, 48, 0.85);
  border: 1px solid rgba(0, 240, 255, 0.3);
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-main);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  white-space: nowrap;
  pointer-events: auto;
  transition: all 0.3s ease;
  z-index: 10;
}

.hud-node:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 20px var(--cyan-glow);
  transform: scale(1.05);
}

.hud-node-top {
  top: 15px;
  left: 50%;
  transform: translateX(-50%);
}

.hud-node-left {
  left: -20px;
  top: 40%;
}

.hud-node-right {
  right: -20px;
  top: 55%;
}

.hud-node-bottom {
  bottom: 25px;
  right: 20px;
}

.hud-node .hud-tag {
  color: var(--cyan);
  font-weight: 700;
  margin-right: 0.35rem;
}

@keyframes rotate-x {
  0% { transform: rotateX(65deg) rotateY(0deg) rotateZ(0deg); }
  100% { transform: rotateX(65deg) rotateY(360deg) rotateZ(360deg); }
}

@keyframes rotate-y {
  0% { transform: rotateX(-50deg) rotateY(0deg) rotateZ(30deg); }
  100% { transform: rotateX(-50deg) rotateY(360deg) rotateZ(30deg); }
}

@keyframes rotate-z {
  0% { transform: rotateX(30deg) rotateY(40deg) rotateZ(0deg); }
  100% { transform: rotateX(30deg) rotateY(40deg) rotateZ(360deg); }
}

@keyframes float-orb {
  0% { transform: translateY(8px) scale(0.98); }
  100% { transform: translateY(-16px) scale(1.02); }
}

@keyframes pulse-aura {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.4; }
  50% { transform: translate(-50%, -50%) scale(1.3); opacity: 0.8; }
}

@keyframes shadow-breathe {
  0% { transform: scale(1.1); opacity: 0.4; }
  100% { transform: scale(0.75); opacity: 0.15; }
}

/* ==========================================================================
   Principles Cards (Interactive 3D Tilt & Lift)
   ========================================================================== */
.section-pad {
  padding-top: 100px;
  padding-bottom: 100px;
  position: relative;
}

.section-header {
  margin-bottom: 4rem;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  text-transform: uppercase;
  margin-top: 0.75rem;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 680px;
}

.principle-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--bg-glass-border);
  border-radius: 20px;
  padding: 2.2rem 2rem;
  height: 100%;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.4s ease;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.principle-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--cyan) 50%, transparent 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.principle-card:hover {
  transform: translateY(-12px);
  border-color: rgba(0, 240, 255, 0.45);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.7), 0 0 30px rgba(0, 240, 255, 0.18);
  background: var(--bg-card-hover);
}

.principle-card:hover::before {
  opacity: 1;
}

.principle-card-number {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
  color: rgba(255, 255, 255, 0.08);
  position: absolute;
  top: 1.5rem;
  right: 1.8rem;
  pointer-events: none;
  transition: color 0.4s ease;
}

.principle-card:hover .principle-card-number {
  color: rgba(0, 240, 255, 0.25);
  text-shadow: 0 0 15px var(--cyan);
}

.principle-icon-box {
  width: 58px;
  height: 58px;
  border-radius: 14px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--cyan);
  margin-bottom: 1.6rem;
  box-shadow: inset 0 0 15px rgba(0, 240, 255, 0.1);
  transition: transform 0.3s ease, background 0.3s ease;
}

.principle-card:hover .principle-icon-box {
  transform: scale(1.08) rotate(4deg);
  background: rgba(0, 240, 255, 0.16);
  box-shadow: 0 0 20px var(--cyan-glow);
}

.principle-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.principle-desc {
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.principle-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.principle-equation {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  background: rgba(0, 240, 255, 0.06);
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  border: 1px solid rgba(0, 240, 255, 0.15);
}

.principle-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* ==========================================================================
   Zero-G Physics Chamber (Interactive HTML5 Canvas Sandbox)
   ========================================================================== */
.chamber-wrapper {
  background: rgba(8, 14, 34, 0.8);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7), 0 0 40px rgba(0, 240, 255, 0.12);
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}

.chamber-hud-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid rgba(0, 240, 255, 0.15);
  flex-wrap: wrap;
  gap: 1rem;
}

.chamber-status {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--cyan);
}

.chamber-controls-bar {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.canvas-viewport-container {
  position: relative;
  width: 100%;
  height: 480px;
  border-radius: 16px;
  background: radial-gradient(circle at center, #060b1d 0%, #030611 100%);
  border: 1px solid rgba(0, 240, 255, 0.12);
  overflow: hidden;
  cursor: grab;
}

.canvas-viewport-container:active {
  cursor: grabbing;
}

#physics-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.chamber-canvas-overlay {
  position: absolute;
  top: 16px;
  left: 16px;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.5;
  background: rgba(4, 7, 17, 0.6);
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.chamber-canvas-overlay span.active-val {
  color: var(--cyan);
  font-weight: 700;
}

.chamber-footer-controls {
  margin-top: 1.2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  align-items: center;
}

.control-group-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.control-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.control-label span.value {
  color: var(--cyan);
  font-weight: 600;
}

.custom-range {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  outline: none;
}

.custom-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--cyan);
  cursor: pointer;
  box-shadow: 0 0 10px var(--cyan);
  transition: transform 0.15s ease;
}

.custom-range::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

/* ==========================================================================
   Gravity Controller Floating Dock (Interactive HUD)
   ========================================================================== */
.gravity-hud-dock {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1040;
  background: rgba(7, 13, 32, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(0, 240, 255, 0.3);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8), 0 0 25px rgba(0, 240, 255, 0.2);
  border-radius: 999px;
  padding: 0.45rem 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: transform 0.3s ease;
}

.gravity-hud-dock:hover {
  border-color: var(--cyan);
  box-shadow: 0 15px 45px rgba(0, 0, 0, 0.9), 0 0 35px rgba(0, 240, 255, 0.35);
}

.hud-dock-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  text-transform: uppercase;
  padding: 0 0.8rem 0 0.6rem;
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.dock-pill-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.dock-pill-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
}

.dock-pill-btn.active {
  background: linear-gradient(135deg, var(--cyan) 0%, #0088ff 100%);
  color: #040711;
  box-shadow: 0 0 15px var(--cyan-glow);
}

.dock-sound-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.85rem;
  margin-left: 0.3rem;
  transition: all 0.2s ease;
}

.dock-sound-btn:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.dock-sound-btn.active {
  color: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 10px var(--cyan-glow);
}

/* ==========================================================================
   Waveform / Harmonic Tuner Visualizer
   ========================================================================== */
.wave-canvas-box {
  width: 100%;
  height: 220px;
  background: rgba(3, 6, 17, 0.7);
  border: 1px solid rgba(0, 240, 255, 0.18);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
}

#wave-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ==========================================================================
   Spec Sheet & Comparison Matrix Table
   ========================================================================== */
.table-gravitas {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-family: var(--font-heading);
}

.table-gravitas th {
  background: rgba(14, 25, 58, 0.8);
  font-family: var(--font-display);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding: 1.1rem 1.4rem;
  border-top: 1px solid rgba(0, 240, 255, 0.2);
  border-bottom: 1px solid rgba(0, 240, 255, 0.2);
}

.table-gravitas th:first-child {
  border-top-left-radius: 12px;
}

.table-gravitas th:last-child {
  border-top-right-radius: 12px;
}

.table-gravitas td {
  background: rgba(7, 13, 32, 0.5);
  padding: 1.1rem 1.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  font-size: 0.92rem;
  vertical-align: middle;
}

.table-gravitas tr:hover td {
  background: rgba(0, 240, 255, 0.05);
  color: #ffffff;
}

.table-gravitas tr.highlighted td {
  background: rgba(0, 240, 255, 0.08);
  color: #ffffff;
  font-weight: 600;
}

.table-gravitas tr.highlighted td:first-child {
  color: var(--cyan);
  font-family: var(--font-display);
}

/* ==========================================================================
   Accordion Customization (Dark Glassmorphism)
   ========================================================================== */
.accordion-gravitas .accordion-item {
  background: var(--bg-card);
  border: 1px solid var(--bg-glass-border);
  border-radius: 16px !important;
  margin-bottom: 1rem;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.accordion-gravitas .accordion-button {
  background: transparent;
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  padding: 1.3rem 1.5rem;
  box-shadow: none;
  transition: all 0.3s ease;
}

.accordion-gravitas .accordion-button:not(.collapsed) {
  background: rgba(0, 240, 255, 0.08);
  color: var(--cyan);
  border-bottom: 1px solid rgba(0, 240, 255, 0.15);
}

.accordion-gravitas .accordion-button::after {
  filter: invert(1) hue-rotate(180deg);
  transition: transform 0.3s ease;
}

.accordion-gravitas .accordion-body {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  padding: 1.4rem 1.6rem;
}

/* ==========================================================================
   Modals & High-Tech Schematics
   ========================================================================== */
.modal-content-gravitas {
  background: rgba(9, 16, 38, 0.95);
  backdrop-filter: blur(25px);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 20px;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.9), 0 0 50px rgba(0, 240, 255, 0.25);
  color: var(--text-main);
}

.modal-header-gravitas {
  border-bottom: 1px solid rgba(0, 240, 255, 0.15);
  padding: 1.4rem 1.8rem;
}

.modal-footer-gravitas {
  border-top: 1px solid rgba(0, 240, 255, 0.15);
  padding: 1.2rem 1.8rem;
}

/* Form Controls */
.form-control-gravitas {
  background: rgba(5, 9, 23, 0.8);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 12px;
  color: #ffffff;
  font-family: var(--font-body);
  padding: 0.85rem 1.2rem;
  transition: all 0.3s ease;
}

.form-control-gravitas:focus {
  background: rgba(8, 14, 34, 0.95);
  border-color: var(--cyan);
  box-shadow: 0 0 20px var(--cyan-glow);
  color: #ffffff;
}

.form-control-gravitas::placeholder {
  color: var(--text-dim);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer-gravitas {
  position: relative;
  border-top: 1px solid rgba(0, 240, 255, 0.12);
  background: rgba(3, 5, 14, 0.9);
  padding-top: 80px;
  padding-bottom: 110px;
  z-index: 2;
}

.footer-brand-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  max-width: 360px;
}

.footer-nav-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #ffffff;
  margin-bottom: 1.2rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.65rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.footer-links a:hover {
  color: var(--cyan);
  padding-left: 4px;
  text-shadow: 0 0 8px var(--cyan);
}

.footer-bottom {
  margin-top: 50px;
  padding-top: 25px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Media Queries & Responsiveness
   ========================================================================== */
@media (max-width: 991.98px) {
  .hero-section {
    padding-top: 120px;
    text-align: center;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-telemetry-grid {
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }

  .levitation-stage {
    height: 380px;
    margin-top: 2rem;
  }

  .hud-node-left {
    left: 10px;
  }

  .hud-node-right {
    right: 10px;
  }

  .gravity-hud-dock {
    width: 95%;
    max-width: 520px;
    justify-content: center;
    overflow-x: auto;
  }
}

@media (max-width: 575.98px) {
  .nav-container-pill {
    padding: 0.5rem 1rem;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .gravity-hud-dock {
    bottom: 12px;
    padding: 0.35rem 0.45rem;
  }

  .dock-pill-btn {
    font-size: 0.65rem;
    padding: 0.35rem 0.65rem;
  }

  .hud-dock-title {
    display: none;
  }
}