/* ===== CSS VARIABLES ===== */
:root {
  /* Dark Theme Colors */
  --bg-primary: #0a0a0b;
  --bg-secondary: #1a1a1d;
  --bg-tertiary: #2a2a2f;
  --bg-card: #1e1e23;
  --bg-glass: rgba(26, 26, 29, 0.85);
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #b4b4b8;
  --text-muted: #8a8a8f;
  --text-accent: #64ffda;
  
  /* Accent Colors */
  --accent-primary: #64ffda;
  --accent-secondary: #7c3aed;
  --accent-gradient: linear-gradient(135deg, #64ffda 0%, #7c3aed 100%);
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-orange: #f59e0b;
  --accent-green: #10b981;
  
  /* Neural Network Colors */
  --neural-cyan: #00ffff;
  --neural-purple: #8a2be2;
  --neural-pink: #ff1493;
  --neural-gold: #ffd700;
  --quantum-glow: rgba(0, 255, 255, 0.8);
  --energy-flow: linear-gradient(90deg, #00ffff, #8a2be2, #ff1493, #ffd700);
  
  /* Status Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Border Colors */
  --border-primary: #2a2a2f;
  --border-secondary: #3a3a3f;
  --border-accent: #64ffda;
  
  /* Shadow Colors */
  --shadow-light: rgba(0, 0, 0, 0.1);
  --shadow-medium: rgba(0, 0, 0, 0.2);
  --shadow-heavy: rgba(0, 0, 0, 0.4);
  --shadow-glow: rgba(100, 255, 218, 0.2);
  --shadow-purple: rgba(124, 58, 237, 0.3);
  --quantum-shadow: 0 0 30px rgba(0, 255, 255, 0.5);
  
  /* Fonts */
  --font-primary: 'Poppins', 'Inter', system-ui, -apple-system, sans-serif;
  --font-secondary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-futuristic: 'Orbitron', 'Poppins', monospace;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-modal: 1100;
  --z-toast: 1200;
  --z-tooltip: 1300;
}

/* ===== RESET & BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

body.dark-theme {
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 600; }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-size: 1.1rem;
  line-height: 1.7;
}

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

a:hover {
  color: var(--accent-secondary);
  text-shadow: 0 0 8px var(--shadow-glow);
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease-out;
}

.loading-spinner {
  text-align: center;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--border-primary);
  border-top: 3px solid var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-sm);
}

.loading-screen p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  font-family: var(--font-futuristic);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ===== FUTURISTIC HEADER ===== */
.futuristic-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  z-index: var(--z-modal);
  background: rgba(10, 10, 11, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 255, 255, 0.3);
  overflow: hidden;
}

/* Neural Network Background */
.neural-network-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.3;
  z-index: 1;
}

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

/* Holographic Grid */
.holographic-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    linear-gradient(90deg, transparent 24px, rgba(0, 255, 255, 0.03) 25px, rgba(0, 255, 255, 0.03) 26px, transparent 27px),
    linear-gradient(180deg, transparent 24px, rgba(0, 255, 255, 0.03) 25px, rgba(0, 255, 255, 0.03) 26px, transparent 27px);
  background-size: 25px 25px;
  animation: grid-flow 20s linear infinite;
  z-index: 2;
}

@keyframes grid-flow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(25px, 25px); }
}

/* Floating Particles */
.particle-field {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--neural-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--neural-cyan);
  animation: float-particle 15s linear infinite;
}

.particle:nth-child(1) { left: 10%; animation-delay: 0s; }
.particle:nth-child(2) { left: 20%; animation-delay: 2s; }
.particle:nth-child(3) { left: 30%; animation-delay: 4s; }
.particle:nth-child(4) { left: 40%; animation-delay: 6s; }
.particle:nth-child(5) { left: 60%; animation-delay: 8s; }
.particle:nth-child(6) { left: 70%; animation-delay: 10s; }
.particle:nth-child(7) { left: 80%; animation-delay: 12s; }
.particle:nth-child(8) { left: 90%; animation-delay: 14s; }

@keyframes float-particle {
  0% { 
    transform: translateY(100px) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
    transform: translateY(80px) scale(1);
  }
  90% {
    opacity: 1;
    transform: translateY(-20px) scale(1);
  }
  100% {
    transform: translateY(-40px) scale(0);
    opacity: 0;
  }
}

/* Quantum Navbar */
.quantum-navbar {
  position: relative;
  width: 100%;
  height: 100%;
  z-index: 10;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  position: relative;
}

/* Quantum Logo */
.quantum-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  z-index: 20;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  transition: var(--transition-normal);
}

.logo-core {
  position: relative;
  width: 60px;
  height: 60px;
}

.neural-orbit {
  position: relative;
  width: 100%;
  height: 100%;
  animation: neural-rotation 20s linear infinite;
}

.orbit-ring {
  position: absolute;
  border: 1px solid;
  border-radius: 50%;
  animation: ring-pulse 3s ease-in-out infinite;
}

.ring-1 {
  top: 5px;
  left: 5px;
  right: 5px;
  bottom: 5px;
  border-color: var(--neural-cyan);
  animation-delay: 0s;
}

.ring-2 {
  top: 10px;
  left: 10px;
  right: 10px;
  bottom: 10px;
  border-color: var(--neural-purple);
  animation-delay: 1s;
}

.ring-3 {
  top: 15px;
  left: 15px;
  right: 15px;
  bottom: 15px;
  border-color: var(--neural-pink);
  animation-delay: 2s;
}

.central-brain {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 25px;
  height: 25px;
  background: var(--accent-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-primary);
  font-size: 0.9rem;
  box-shadow: var(--quantum-shadow);
  animation: brain-pulse 2s ease-in-out infinite;
}

.brain-pulse {
  position: absolute;
  top: -5px;
  left: -5px;
  right: -5px;
  bottom: -5px;
  border: 2px solid var(--neural-cyan);
  border-radius: 50%;
  animation: pulse-ring 2s ease-in-out infinite;
}

.data-nodes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.node {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--neural-gold);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--neural-gold);
  animation: node-orbit 4s linear infinite;
}

.node-1 { top: 0; left: 50%; animation-delay: 0s; }
.node-2 { top: 50%; right: 0; animation-delay: 1s; }
.node-3 { bottom: 0; left: 50%; animation-delay: 2s; }
.node-4 { top: 50%; left: 0; animation-delay: 3s; }

@keyframes neural-rotation {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes ring-pulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

@keyframes brain-pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.1); }
}

@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(1.5); opacity: 0; }
}

@keyframes node-orbit {
  0% { transform: rotate(0deg) translateX(25px) rotate(0deg); }
  100% { transform: rotate(360deg) translateX(25px) rotate(-360deg); }
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.name-glitch {
  font-family: var(--font-futuristic);
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--text-primary);
  position: relative;
  animation: glitch-text 3s ease-in-out infinite;
}

.name-glitch::before,
.name-glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.name-glitch::before {
  animation: glitch-1 0.5s linear infinite;
  color: var(--neural-cyan);
  z-index: -1;
}

.name-glitch::after {
  animation: glitch-2 0.5s linear infinite;
  color: var(--neural-pink);
  z-index: -2;
}

.title-matrix {
  font-family: var(--font-futuristic);
  font-size: 0.75rem;
  color: var(--neural-cyan);
  font-weight: 500;
  letter-spacing: 1px;
  animation: matrix-glow 2s ease-in-out infinite;
}

.code-stream {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--neural-purple);
  opacity: 0.7;
  animation: code-flow 3s linear infinite;
}

@keyframes glitch-text {
  0%, 90%, 100% { transform: translate(0); }
  10% { transform: translate(-2px, 2px); }
  20% { transform: translate(2px, -2px); }
  30% { transform: translate(-2px, -2px); }
  40% { transform: translate(2px, 2px); }
  50% { transform: translate(-2px, 2px); }
  60% { transform: translate(2px, -2px); }
  70% { transform: translate(-2px, -2px); }
  80% { transform: translate(2px, 2px); }
}

@keyframes glitch-1 {
  0%, 100% { transform: translate(0); }
  20% { transform: translate(-2px, 2px); }
  40% { transform: translate(-2px, -2px); }
  60% { transform: translate(2px, 2px); }
  80% { transform: translate(2px, -2px); }
}

@keyframes glitch-2 {
  0%, 100% { transform: translate(0); }
  20% { transform: translate(2px, 2px); }
  40% { transform: translate(2px, -2px); }
  60% { transform: translate(-2px, 2px); }
  80% { transform: translate(-2px, -2px); }
}

@keyframes matrix-glow {
  0%, 100% { text-shadow: 0 0 5px var(--neural-cyan); }
  50% { text-shadow: 0 0 20px var(--neural-cyan), 0 0 30px var(--neural-cyan); }
}

@keyframes code-flow {
  0% { opacity: 0.3; }
  50% { opacity: 0.8; }
  100% { opacity: 0.3; }
}

/* Quantum Navigation Menu */
.quantum-nav-menu {
  display: flex;
  align-items: center;
  z-index: 15;
}

.nav-quantum-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-quantum-item {
  position: relative;
}

.nav-quantum-link {
  display: block;
  text-decoration: none;
  position: relative;
  transition: var(--transition-normal);
}

.link-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  position: relative;
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: var(--transition-normal);
}

.icon-hologram {
  position: relative;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neural-cyan);
  font-size: 1rem;
  transition: var(--transition-normal);
}

.hologram-effect {
  position: absolute;
  top: -5px;
  left: -5px;
  right: -5px;
  bottom: -5px;
  border: 1px solid var(--neural-cyan);
  border-radius: 50%;
  opacity: 0;
  animation: hologram-pulse 2s ease-in-out infinite;
  transition: var(--transition-normal);
}

.link-text {
  font-family: var(--font-futuristic);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  transition: var(--transition-normal);
}

.quantum-underline {
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--energy-flow);
  transform: translateX(-50%);
  transition: var(--transition-normal);
}

.energy-trail {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle, rgba(0, 255, 255, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: var(--transition-normal);
}

.nav-quantum-link:hover .icon-hologram {
  color: var(--neural-gold);
  transform: scale(1.2) rotateY(180deg);
  text-shadow: 0 0 15px var(--neural-gold);
}

.nav-quantum-link:hover .hologram-effect {
  opacity: 1;
  border-color: var(--neural-gold);
  box-shadow: 0 0 20px var(--neural-gold);
}

.nav-quantum-link:hover .link-text {
  color: var(--neural-gold);
  text-shadow: 0 0 10px var(--neural-gold);
}

.nav-quantum-link:hover .quantum-underline {
  width: 100%;
}

.nav-quantum-link:hover .energy-trail {
  opacity: 1;
}

.nav-quantum-link.active .icon-hologram {
  color: var(--neural-pink);
  text-shadow: 0 0 15px var(--neural-pink);
}

.nav-quantum-link.active .link-text {
  color: var(--neural-pink);
  text-shadow: 0 0 10px var(--neural-pink);
}

.nav-quantum-link.active .quantum-underline {
  width: 100%;
  background: var(--neural-pink);
  box-shadow: 0 0 10px var(--neural-pink);
}

.nav-quantum-link.active .energy-trail {
  opacity: 1;
}

@keyframes hologram-pulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.2); opacity: 0.8; }
}

/* Quantum Controls */
.quantum-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  z-index: 15;
}

.ai-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(0, 255, 255, 0.1);
  border: 1px solid var(--neural-cyan);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
}

.status-light {
  width: 6px;
  height: 6px;
  background: var(--neural-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--neural-cyan);
  animation: status-pulse 2s ease-in-out infinite;
}

.status-text {
  font-family: var(--font-futuristic);
  font-size: 0.65rem;
  color: var(--neural-cyan);
  font-weight: 600;
  letter-spacing: 1px;
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.neural-menu-toggle {
  width: 45px;
  height: 45px;
  background: rgba(0, 0, 0, 0.5);
  border: 2px solid var(--neural-cyan);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-normal);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.neural-lines {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.neural-line {
  width: 18px;
  height: 2px;
  background: var(--neural-cyan);
  border-radius: 2px;
  transition: var(--transition-normal);
  position: relative;
}

.neural-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle, rgba(0, 255, 255, 0.2) 0%, transparent 70%);
  opacity: 0;
  transition: var(--transition-normal);
}

.neural-menu-toggle:hover {
  border-color: var(--neural-gold);
  box-shadow: 0 0 25px var(--neural-gold);
  transform: scale(1.05);
}

.neural-menu-toggle:hover .neural-line {
  background: var(--neural-gold);
}

.neural-menu-toggle:hover .neural-glow {
  opacity: 1;
}

.neural-menu-toggle.active .line-1 {
  transform: rotate(45deg) translate(6px, 6px);
}

.neural-menu-toggle.active .line-2 {
  opacity: 0;
}

.neural-menu-toggle.active .line-3 {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Quantum Energy Bar */
.quantum-energy-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(0, 0, 0, 0.3);
  overflow: hidden;
}

.energy-flow {
  width: 100%;
  height: 100%;
  background: var(--energy-flow);
  background-size: 200% 100%;
  animation: energy-animation 3s linear infinite;
}

@keyframes energy-animation {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ===== MAIN CONTENT ===== */
.main-content {
  margin-top: 80px;
  min-height: calc(100vh - 80px);
}

/* ===== SECTIONS ===== */
.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(100, 255, 218, 0.02) 0%, 
    rgba(124, 58, 237, 0.02) 50%, 
    rgba(100, 255, 218, 0.02) 100%);
  pointer-events: none;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  position: relative;
  z-index: 1;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: var(--transition-normal);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--accent-gradient);
  color: var(--bg-primary);
  box-shadow: 0 8px 25px var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px var(--shadow-glow);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-secondary);
}

.btn-secondary:hover {
  background: var(--accent-primary);
  color: var(--bg-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-glow);
}

.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border: 2px solid var(--accent-primary);
}

.btn-outline:hover {
  background: var(--accent-primary);
  color: var(--bg-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-glow);
}

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(100, 255, 218, 0.03) 0%, 
    rgba(124, 58, 237, 0.03) 100%);
  opacity: 0;
  transition: var(--transition-normal);
}

.card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-primary);
  box-shadow: 0 20px 40px var(--shadow-medium);
}

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

/* ===== SCROLL TO TOP ===== */
.scroll-to-top {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 50px;
  height: 50px;
  background: var(--accent-gradient);
  color: var(--bg-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  z-index: var(--z-dropdown);
  transition: var(--transition-normal);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  box-shadow: 0 8px 25px var(--shadow-glow);
}

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

.scroll-to-top:hover {
  transform: translateY(-3px) scale(1.1);
  box-shadow: 0 12px 35px var(--shadow-glow);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px var(--shadow-glow); }
  50% { box-shadow: 0 0 30px var(--shadow-glow), 0 0 40px var(--shadow-glow); }
}

/* Animation Classes */
.animate-fadeInUp {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-fadeInLeft {
  animation: fadeInLeft 0.6s ease-out forwards;
}

.animate-fadeInRight {
  animation: fadeInRight 0.6s ease-out forwards;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

.animate-glow {
  animation: glow 2s infinite;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
  .nav-container {
    padding: 0 var(--spacing-md);
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }

  .quantum-nav-menu {
    display: none;
  }

  .neural-menu-toggle {
    display: flex;
  }

  .ai-status {
    display: none;
  }

  .nav-quantum-list {
    gap: var(--spacing-sm);
  }

  .link-text {
    font-size: 0.65rem;
  }
}

@media (max-width: 768px) {
  .futuristic-header {
    height: 70px;
  }

  .main-content {
    margin-top: 70px;
  }

  .nav-container {
    height: 70px;
  }

  .logo-core {
    width: 50px;
    height: 50px;
  }

  .central-brain {
    width: 20px;
    height: 20px;
    font-size: 0.8rem;
  }

  .name-glitch {
    font-size: 1rem;
  }

  .title-matrix {
    font-size: 0.7rem;
  }

  .code-stream {
    font-size: 0.6rem;
  }

  .neural-menu-toggle {
    width: 40px;
    height: 40px;
  }

  .quantum-nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 11, 0.95);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--neural-cyan);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
  }

  .quantum-nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    display: block;
  }

  .nav-quantum-list {
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
  }

  .nav-quantum-item {
    width: 100%;
  }

  .link-container {
    flex-direction: row;
    justify-content: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(0, 255, 255, 0.05);
    border-radius: var(--radius-md);
  }
}

@media (max-width: 480px) {
  .futuristic-header {
    height: 65px;
  }

  .main-content {
    margin-top: 65px;
  }

  .nav-container {
    height: 65px;
    padding: 0 var(--spacing-sm);
  }

  .logo-core {
    width: 45px;
    height: 45px;
  }

  .logo-text .name-glitch {
    font-size: 0.9rem;
  }

  .logo-text .title-matrix {
    font-size: 0.65rem;
  }

  .logo-text .code-stream {
    display: none;
  }

  .neural-menu-toggle {
    width: 35px;
    height: 35px;
  }

  .neural-lines {
    gap: 2px;
  }

  .neural-line {
    width: 16px;
  }

  .scroll-to-top {
    width: 45px;
    height: 45px;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
  }
}