:root {
  /* Core Colors - Dark Mode */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a28;
  
  --text-primary: #e8e9ed;
  --text-secondary: #9fa3b0;
  --text-tertiary: #6b7280;
  
  --accent-primary: #00d9ff;
  --accent-secondary: #7b2fff;
  --accent-tertiary: #ff2e97;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 217, 255, 0.3);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px rgba(0, 217, 255, 0.15);
  
  --font-display: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, monospace;
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode */
body.light-mode {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f6f8;
  --bg-tertiary: #e8eaed;
  
  --text-primary: #0a0a0f;
  --text-secondary: #4a4d5a;
  --text-tertiary: #8b8f9b;
  
  --accent-primary: #0088cc;
  --accent-secondary: #6200ea;
  --accent-tertiary: #d81b60;
  
  --border-color: rgba(0, 0, 0, 0.08);
  --border-glow: rgba(0, 136, 204, 0.3);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background var(--transition-slow), color var(--transition-slow);
}

/* ========================================
   BACKGROUND CANVASES
   ======================================== */
#neuralCanvas,
#matrixRain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

#neuralCanvas {
  opacity: 0.4;
}

#matrixRain {
  opacity: 0.15;
  z-index: 1;
}

#gradientMesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 217, 255, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(123, 47, 255, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(255, 46, 151, 0.05) 0%, transparent 50%);
  animation: meshShift 20s ease-in-out infinite;
}

@keyframes meshShift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-10px, 20px) scale(1.05); }
  66% { transform: translate(10px, -10px) scale(0.95); }
}

/* ========================================
   NAVIGATION
   ======================================== */
#mainNav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 5%;
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-base);
}

body.light-mode #mainNav {
  background: rgba(255, 255, 255, 0.85);
}

#mainNav.scrolled {
  padding: 0.75rem 5%;
  box-shadow: var(--shadow-md);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.nav-pulse {
  width: 8px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 50%;
  position: relative;
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.nav-pulse::before {
  content: '';
  position: absolute;
  inset: -4px;
  background: var(--accent-primary);
  border-radius: 50%;
  opacity: 0;
  animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

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

@keyframes ping {
  75%, 100% {
    transform: scale(2.5);
    opacity: 0;
  }
}

.nav-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-primary);
  opacity: 0.8;
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-icon {
  font-size: 0.7rem;
  color: var(--accent-primary);
  opacity: 0.6;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

#themeToggle {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-tertiary);
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

#themeToggle:hover {
  background: var(--bg-secondary);
  transform: scale(1.05);
}

.theme-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

body.light-mode .theme-icon {
  background: var(--accent-secondary);
  box-shadow: inset -6px -6px 0 var(--bg-primary);
}

/* ========================================
   HERO SECTION
   ======================================== */
.section-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 5% 4rem;
  position: relative;
  z-index: 2;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 5rem;
  align-items: center;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Terminal Window */
.terminal-window {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: 1rem;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
  display: flex;
  gap: 0.5rem;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.terminal-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: #27c93f;
  margin-left: auto;
}

.terminal-body {
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  max-height: 400px;
  overflow-y: auto;
}

.terminal-prompt {
  color: var(--accent-primary);
  user-select: none;
}

.terminal-sep {
  color: var(--text-tertiary);
  margin: 0 0.25rem;
}

.terminal-path {
  color: var(--accent-secondary);
}

.terminal-cursor {
  color: var(--text-secondary);
  margin: 0 0.5rem;
}

.terminal-command {
  color: #27c93f;
}

.terminal-output {
  color: var(--text-secondary);
  margin: 0.25rem 0;
}

.terminal-success {
  color: #27c93f;
}

.terminal-info {
  color: var(--accent-primary);
}

.terminal-warn {
  color: #ffbd2e;
}

.terminal-blink {
  color: var(--text-primary);
  animation: blink 1s step-end infinite;
}

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

/* Hero Title */
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hero-line {
  display: block;
}

.hero-glitch {
  position: relative;
  display: inline-block;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-glitch::before,
.hero-glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
}

.hero-glitch:hover::before {
  animation: glitch-1 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.hero-glitch:hover::after {
  animation: glitch-2 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes glitch-1 {
  0% { transform: translate(0); opacity: 0; }
  20% { transform: translate(-3px, 3px); opacity: 0.8; clip-path: polygon(0 0, 100% 0, 100% 45%, 0 45%); }
  40% { transform: translate(-3px, -3px); opacity: 0.8; clip-path: polygon(0 55%, 100% 55%, 100% 100%, 0 100%); }
  60% { transform: translate(3px, 3px); opacity: 0.8; clip-path: polygon(0 0, 100% 0, 100% 30%, 0 30%); }
  80% { transform: translate(3px, -3px); opacity: 0.8; clip-path: polygon(0 70%, 100% 70%, 100% 100%, 0 100%); }
  100% { transform: translate(0); opacity: 0; }
}

@keyframes glitch-2 {
  0% { transform: translate(0); opacity: 0; }
  20% { transform: translate(3px, -3px); opacity: 0.8; clip-path: polygon(0 45%, 100% 45%, 100% 55%, 0 55%); }
  40% { transform: translate(3px, 3px); opacity: 0.8; clip-path: polygon(0 30%, 100% 30%, 100% 70%, 0 70%); }
  60% { transform: translate(-3px, -3px); opacity: 0.8; clip-path: polygon(0 0, 100% 0, 100% 20%, 0 20%); }
  80% { transform: translate(-3px, 3px); opacity: 0.8; clip-path: polygon(0 80%, 100% 80%, 100% 100%, 0 100%); }
  100% { transform: translate(0); opacity: 0; }
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.subtitle-brackets {
  color: var(--accent-primary);
  font-weight: 700;
}

.subtitle-text {
  flex: 1;
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 600px;
}

.highlight {
  color: var(--accent-primary);
  font-weight: 600;
}

.highlight-alt {
  color: var(--accent-secondary);
  font-weight: 600;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 2rem;
  padding: 1.5rem 0;
  align-items: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent-primary);
  line-height: 1;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.stat-divider {
  width: 2px;
  height: 40px;
  background: linear-gradient(180deg, transparent, var(--border-color), transparent);
}

/* Hero Actions */
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 12px;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  box-shadow: 0 4px 20px rgba(0, 217, 255, 0.3);
}

.btn-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-secondary), var(--accent-tertiary));
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 0;
}

.btn-text,
.btn-icon {
  position: relative;
  z-index: 1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 217, 255, 0.4);
}

.btn-primary:hover .btn-bg {
  opacity: 1;
}

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

.btn-secondary .btn-bg {
  background: var(--bg-secondary);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-secondary:hover .btn-bg {
  opacity: 1;
}

/* Hero Social */
.hero-social {
  display: flex;
  gap: 1rem;
  padding-top: 1rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.social-link svg {
  width: 16px;
  height: 16px;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.social-link:hover {
  background: var(--bg-secondary);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 217, 255, 0.2);
}

.social-link:hover svg {
  opacity: 1;
}

/* Hero Visual - Neural Core */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.neural-core {
  width: 450px;
  height: 450px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.core-ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid;
  animation: rotate-ring 20s linear infinite;
}

.core-ring.ring-1 {
  width: 100%;
  height: 100%;
  border-color: rgba(0, 217, 255, 0.2);
  border-style: dashed;
  animation-duration: 30s;
}

.core-ring.ring-2 {
  width: 80%;
  height: 80%;
  border-color: rgba(123, 47, 255, 0.2);
  animation-duration: 20s;
  animation-direction: reverse;
}

.core-ring.ring-3 {
  width: 60%;
  height: 60%;
  border-color: rgba(255, 46, 151, 0.2);
  border-style: dotted;
  animation-duration: 15s;
}

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

.core-avatar {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  overflow: hidden;
  position: relative;
  z-index: 2;
  border: 4px solid var(--accent-primary);
  box-shadow: 
    0 0 60px rgba(0, 217, 255, 0.4),
    inset 0 0 40px rgba(0, 217, 255, 0.1);
  animation: float-avatar 6s ease-in-out infinite;
}

@keyframes float-avatar {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.05); }
}

.core-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-scan {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, 
    transparent 0%, 
    rgba(0, 217, 255, 0.3) 50%, 
    transparent 100%
  );
  animation: scan 3s linear infinite;
}

@keyframes scan {
  from { transform: translateY(-100%); }
  to { transform: translateY(100%); }
}

.core-data {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: rotate-data 12s linear infinite;
}

.core-data[data-angle="0"] { transform: rotate(0deg); }
.core-data[data-angle="60"] { transform: rotate(60deg); }
.core-data[data-angle="120"] { transform: rotate(120deg); }
.core-data[data-angle="180"] { transform: rotate(180deg); }
.core-data[data-angle="240"] { transform: rotate(240deg); }
.core-data[data-angle="300"] { transform: rotate(300deg); }

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

.data-point {
  position: absolute;
  top: -20px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent-primary);
  background: var(--bg-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  white-space: nowrap;
  transform: rotate(calc(var(--angle) * -1deg));
  animation: data-float 2s ease-in-out infinite;
}

@keyframes data-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-tertiary);
  letter-spacing: 0.1em;
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 2px;
  animation: scroll-bounce 2s infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translate(-50%, 0); opacity: 1; }
  50% { transform: translate(-50%, 12px); opacity: 0.5; }
}

/* ========================================
   TRANSFORMER ARCHITECTURE SECTION
   ======================================== */
.section-transformer {
  padding: 8rem 5%;
  position: relative;
  z-index: 2;
  background: linear-gradient(180deg, 
    var(--bg-primary) 0%, 
    var(--bg-secondary) 50%, 
    var(--bg-primary) 100%
  );
}

.transformer-container {
  max-width: 1400px;
  margin: 0 auto;
}

.section-description {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1rem;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.transformer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 4rem;
  align-items: start;
}

/* Architecture Visualization */
.architecture-viz {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 3rem 2rem;
  position: sticky;
  top: 6rem;
}

#transformerSVG {
  width: 100%;
  height: auto;
}

.tf-block {
  transition: all var(--transition-base);
}

.block-shape {
  fill: var(--bg-tertiary);
  stroke: var(--border-color);
  stroke-width: 2;
  transition: all var(--transition-base);
}

.input-block { stroke: var(--accent-primary); }
.attention-block { stroke: var(--accent-primary); fill: rgba(0, 217, 255, 0.05); }
.norm-block { stroke: var(--accent-secondary); }
.ffn-block { stroke: var(--accent-tertiary); fill: rgba(255, 46, 151, 0.05); }
.output-block { stroke: var(--accent-primary); }

.tf-block:hover .block-shape {
  filter: drop-shadow(0 0 12px var(--accent-primary));
}

.block-label {
  fill: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  text-anchor: middle;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.attention-head {
  fill: var(--bg-primary);
  stroke: var(--accent-primary);
  stroke-width: 2;
  transition: all var(--transition-fast);
  animation: pulse-head 2s ease-in-out infinite;
}

.attention-head[data-head="1"] { animation-delay: 0s; }
.attention-head[data-head="2"] { animation-delay: 0.2s; }
.attention-head[data-head="3"] { animation-delay: 0.4s; }
.attention-head[data-head="4"] { animation-delay: 0.6s; }
.attention-head[data-head="5"] { animation-delay: 0.8s; }

@keyframes pulse-head {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.2); }
}

.flow-path {
  stroke: var(--accent-primary);
  stroke-width: 2;
  fill: none;
  opacity: 0;
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
  animation: draw-flow 2s ease-in-out forwards, flow-pulse 3s ease-in-out 2s infinite;
}

.flow-path[data-index="1"] { animation-delay: 0s, 2s; }
.flow-path[data-index="2"] { animation-delay: 0.3s, 2.3s; }
.flow-path[data-index="3"] { animation-delay: 0.6s, 2.6s; }
.flow-path[data-index="4"] { animation-delay: 0.9s, 2.9s; }
.flow-path[data-index="5"] { animation-delay: 1.2s, 3.2s; }

@keyframes draw-flow {
  to {
    stroke-dashoffset: 0;
    opacity: 0.6;
  }
}

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

.residual-path {
  stroke: var(--accent-secondary);
  stroke-width: 1.5;
  fill: none;
  stroke-dasharray: 5 5;
  opacity: 0;
  animation: fade-in-residual 1s ease-in-out 1.5s forwards;
}

@keyframes fade-in-residual {
  to { opacity: 0.5; }
}

.multiplier-label {
  fill: var(--accent-tertiary);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
}

.multiplier-box {
  animation: blink-box 2s ease-in-out infinite;
}

@keyframes blink-box {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.7; }
}

/* Attention Matrix */
.attention-matrix-viz {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
}

.matrix-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.matrix-header h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.matrix-controls {
  display: flex;
  gap: 0.5rem;
}

.head-btn {
  padding: 0.5rem 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.head-btn:hover,
.head-btn.active {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

#attentionCanvas {
  width: 100%;
  height: auto;
  border-radius: 8px;
  background: var(--bg-tertiary);
}

.matrix-labels {
  margin-top: 1.5rem;
}

.label-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.label-row span:first-child {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  min-width: 60px;
}

.tokens {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.token {
  padding: 0.375rem 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Mathematical Formulas */
.math-formulas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.formula-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  gap: 1.5rem;
  transition: all var(--transition-base);
}

.formula-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 8px 30px rgba(0, 217, 255, 0.15);
  transform: translateY(-4px);
}

.formula-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 12px;
  font-size: 1.5rem;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.formula-content {
  flex: 1;
}

.formula-name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.formula-eq {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.8;
}

.formula-sub {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  line-height: 1.6;
}

.frac {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  vertical-align: middle;
  margin: 0 0.25rem;
  font-size: 0.85em;
}

.num {
  border-bottom: 1px solid var(--text-primary);
  padding-bottom: 0.125rem;
}

.den {
  padding-top: 0.125rem;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.section-about {
  padding: 8rem 5%;
  position: relative;
  z-index: 2;
}

.about-content {
  max-width: 1400px;
  margin: 0 auto;
}

.spec-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.spec-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.spec-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.spec-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-primary);
  box-shadow: 0 12px 40px rgba(0, 217, 255, 0.2);
}

.spec-card:hover::before {
  opacity: 0.05;
}

.spec-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 12px;
  color: var(--accent-primary);
  position: relative;
  z-index: 1;
}

.spec-value {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent-primary);
  line-height: 1;
  position: relative;
  z-index: 1;
}

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
  letter-spacing: 0.05em;
  position: relative;
  z-index: 1;
}

.spec-bar {
  width: 100%;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.spec-fill {
  height: 100%;
  width: var(--width, 0%);
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 2px;
  transition: width 1.5s var(--ease-smooth) 0.5s;
}

.bio-section {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  align-items: start;
}

.bio-text h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.bio-text p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.bio-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.company {
  color: var(--accent-secondary);
  font-weight: 600;
}

.bio-highlight {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent-primary);
  border-radius: 8px;
  margin-top: 2rem;
}

.bio-highlight svg {
  flex-shrink: 0;
  color: var(--accent-primary);
  margin-top: 0.25rem;
}

.bio-highlight span {
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.6;
}

/* Tech Radar */
.tech-radar {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  position: sticky;
  top: 6rem;
}

.tech-radar svg {
  width: 100%;
  height: auto;
}

.radar-point {
  fill: var(--accent-primary);
  stroke: var(--bg-primary);
  stroke-width: 2;
  cursor: pointer;
  transition: all var(--transition-fast);
  animation: radar-pulse 3s ease-in-out infinite;
}

.radar-point:nth-child(1) { animation-delay: 0s; }
.radar-point:nth-child(2) { animation-delay: 0.5s; }
.radar-point:nth-child(3) { animation-delay: 1s; }
.radar-point:nth-child(4) { animation-delay: 1.5s; }
.radar-point:nth-child(5) { animation-delay: 2s; }
.radar-point:nth-child(6) { animation-delay: 2.5s; }

@keyframes radar-pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.5); }
}

.radar-point:hover {
  transform: scale(2);
  fill: var(--accent-secondary);
}

#radarBeam {
  transform-origin: 150px 150px;
  animation: radar-sweep 4s linear infinite;
}

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

/* ========================================
   TIMELINE
   ======================================== */
.section-experience {
  padding: 8rem 5%;
  position: relative;
  z-index: 2;
}

.timeline {
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
}

.timeline-line {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg,
    var(--accent-primary) 0%,
    var(--accent-secondary) 50%,
    var(--accent-tertiary) 100%
  );
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 4rem;
  padding-left: 4rem;
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.6s var(--ease-smooth);
}

.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline-marker {
  position: absolute;
  left: -7px;
  top: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-primary);
  z-index: 2;
}

.marker-pulse {
  position: absolute;
  inset: -6px;
  background: var(--accent-primary);
  border-radius: 50%;
  opacity: 0;
  animation: marker-pulse 2s ease-out infinite;
}

@keyframes marker-pulse {
  to {
    transform: scale(2);
    opacity: 0;
  }
}

.marker-core {
  width: 100%;
  height: 100%;
  background: var(--accent-primary);
  border-radius: 50%;
}

.timeline-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  transition: all var(--transition-base);
}

.timeline-content:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 8px 30px rgba(0, 217, 255, 0.15);
  transform: translateX(8px);
}

.timeline-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--accent-primary);
  color: white;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.timeline-content h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.timeline-role {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-primary);
  margin-bottom: 0.25rem;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-bottom: 1.5rem;
}

.timeline-details {
  margin-bottom: 1.5rem;
}

.detail-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.detail-icon {
  color: var(--accent-primary);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.detail-item strong {
  color: var(--text-primary);
  font-weight: 600;
}

.timeline-tech {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.375rem 0.75rem;
  background: var(--bg-tertiary);
  color: var(--accent-primary);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.tech-tag:hover {
  background: var(--accent-primary);
  color: white;
  transform: translateY(-2px);
}

/* ========================================
   PROJECTS
   ======================================== */
.section-projects {
  padding: 8rem 5%;
  position: relative;
  z-index: 2;
  background: linear-gradient(180deg,
    var(--bg-primary) 0%,
    var(--bg-secondary) 50%,
    var(--bg-primary) 100%
  );
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.project-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-primary);
  box-shadow: 0 12px 40px rgba(0, 217, 255, 0.2);
}

.project-card:hover::before {
  opacity: 0.05;
}

.project-card.featured {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(0, 217, 255, 0.08), rgba(123, 47, 255, 0.08));
}

.project-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

.project-card h3 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
  position: relative;
  z-index: 1;
}

.project-card p {
  color: var(--text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.project-metrics {
  display: flex;
  gap: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  position: relative;
  z-index: 1;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.metric-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent-primary);
  line-height: 1;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.project-tech {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.project-tech span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.375rem 0.75rem;
  background: var(--bg-tertiary);
  color: var(--accent-primary);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.project-links {
  display: flex;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.project-link:hover {
  color: var(--accent-secondary);
}

/* ========================================
   CONTACT
   ======================================== */
.section-contact {
  padding: 8rem 5%;
  position: relative;
  z-index: 2;
}

.contact-container {
  max-width: 1200px;
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  margin-top: 4rem;
}

.contact-tagline {
  color: var(--text-secondary);
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact-tagline strong {
  color: var(--text-primary);
  font-weight: 600;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  text-decoration: none;
  transition: all var(--transition-base);
}

.contact-method:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 8px 30px rgba(0, 217, 255, 0.15);
  transform: translateX(8px);
}

.method-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: 12px;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.method-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.method-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-tertiary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.method-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.method-arrow {
  color: var(--accent-primary);
  font-size: 1.5rem;
  transition: transform var(--transition-fast);
}

.contact-method:hover .method-arrow {
  transform: translateX(4px);
}

.contact-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: 12px;
}

.status-indicator {
  width: 12px;
  height: 12px;
  background: #27c93f;
  border-radius: 50%;
  position: relative;
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.status-indicator::before {
  content: '';
  position: absolute;
  inset: -4px;
  background: #27c93f;
  border-radius: 50%;
  opacity: 0;
  animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.contact-status span {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.contact-terminal {
  position: sticky;
  top: 6rem;
}

/* ========================================
   FOOTER
   ======================================== */
#footer {
  padding: 4rem 5%;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  position: relative;
  z-index: 2;
}

.footer-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-primary);
}

.footer-info {
  text-align: right;
}

.footer-info p {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin: 0.25rem 0;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1200px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .neural-core {
    width: 350px;
    height: 350px;
  }
  
  .core-avatar {
    width: 220px;
    height: 220px;
  }
  
  .transformer-grid {
    grid-template-columns: 1fr;
  }
  
  .bio-section {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  
  .footer-info {
    text-align: center;
  }
}

@media (max-width: 768px) {
  section {
    padding: 4rem 5%;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .project-card.featured {
    grid-column: span 1;
  }
  
  .spec-cards,
  .math-formulas {
    grid-template-columns: 1fr;
  }
  
  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .stat-divider {
    display: none;
  }
}

@media (max-width: 480px) {
  .neural-core {
    width: 280px;
    height: 280px;
  }
  
  .core-avatar {
    width: 180px;
    height: 180px;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

/* ========================================
   UTILITIES
   ======================================== */
::selection {
  background: var(--accent-primary);
  color: white;
}

::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 5px;
}

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

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