/* ========================================
   CSS Variables & Root Configuration
======================================== */
:root {
  /* Color Palette - Cyberpunk/AI Theme */
  --primary: #00d4ff;          /* Cyan Blue */
  --secondary: #ff6b35;        /* Orange Red */
  --accent: #00ff88;           /* Neon Green */
  --warning: #ffbe0b;          /* Electric Yellow */
  --purple: #8338ec;           /* Deep Purple */
  
  /* Neutral Colors */
  --dark: #0a0a0f;             /* Deep Dark */
  --dark-secondary: #1a1a2e;   /* Dark Blue */
  --dark-tertiary: #16213e;    /* Medium Dark */
  --gray: #2d3748;             /* Gray */
  --light-gray: #4a5568;       /* Light Gray */
  --text-primary: #ffffff;     /* White */
  --text-secondary: #a0aec0;   /* Light Gray Text */
  --text-muted: #718096;       /* Muted Text */
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary), var(--purple));
  --gradient-secondary: linear-gradient(135deg, var(--secondary), var(--warning));
  --gradient-accent: linear-gradient(135deg, var(--accent), var(--primary));
  --gradient-dark: linear-gradient(135deg, var(--dark), var(--dark-secondary));
  
  /* Typography */
  --font-primary: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --font-secondary: 'Inter', 'Segoe UI', system-ui, sans-serif;
  
  /* Font Sizes */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.25rem;
  --fs-5xl: 3rem;
  --fs-6xl: 3.75rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 212, 255, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 212, 255, 0.15);
  --shadow-lg: 0 10px 15px rgba(0, 212, 255, 0.2);
  --shadow-xl: 0 20px 25px rgba(0, 212, 255, 0.25);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4);
  
  /* Border Radius */
  --radius-sm: 0.125rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* ========================================
   Reset & Base Styles
======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Selection Styles */
::selection {
  background: var(--primary);
  color: var(--dark);
}

::-moz-selection {
  background: var(--primary);
  color: var(--dark);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: var(--radius-full);
}

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

/* ========================================
   Loading Screen
======================================== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--dark);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

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

.neural-network {
  position: relative;
  width: 120px;
  height: 80px;
  margin: 0 auto var(--space-6);
}

.node {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse 2s infinite ease-in-out;
}

.node:nth-child(1) {
  top: 0;
  left: 0;
}

.node:nth-child(2) {
  top: 34px;
  left: 54px;
}

.node:nth-child(3) {
  top: 68px;
  right: 0;
  animation-delay: 0.3s;
}

.connection {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: flow 2s infinite ease-in-out;
}

.connection:nth-child(4) {
  top: 6px;
  left: 12px;
  width: 48px;
  transform: rotate(35deg);
}

.connection:nth-child(5) {
  top: 40px;
  left: 66px;
  width: 48px;
  transform: rotate(-35deg);
  animation-delay: 0.5s;
}

.loading-text {
  font-family: var(--font-primary);
  font-size: var(--fs-lg);
  color: var(--text-secondary);
}

.loading-word {
  display: inline-block;
  animation: typewriter 3s infinite;
}

.loading-dots {
  animation: dots 1.5s infinite;
}

/* ========================================
   Navigation
======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(10px);
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo .logo-link {
  font-family: var(--font-primary);
  font-size: var(--fs-xl);
  font-weight: 700;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

.logo-bracket {
  color: var(--primary);
}

.logo-text {
  color: var(--text-primary);
  position: relative;
}

.logo-text::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.nav-logo .logo-link:hover .logo-text::after {
  width: 100%;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  text-decoration: none;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  position: relative;
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  border-radius: var(--radius-md);
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  transform: translateY(-2px);
}

.nav-link:hover::before,
.nav-link.active::before {
  opacity: 0.1;
}

.nav-link i {
  font-size: var(--fs-sm);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: var(--space-2);
}

.bar {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-normal);
}

/* ========================================
   Hero Section
======================================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-dark);
}

.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-text h1 {
  margin-bottom: var(--space-6);
}

.title-line {
  display: block;
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: var(--space-2);
}

.title-main {
  display: block;
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 900;
  font-family: var(--font-primary);
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-4);
  line-height: 1.1;
}

.title-subtitle {
  display: block;
  font-size: var(--fs-2xl);
  color: var(--text-secondary);
  font-family: var(--font-primary);
  margin-bottom: var(--space-6);
}

.typing-text {
  color: var(--accent);
  font-weight: 600;
}

.cursor {
  color: var(--primary);
  animation: blink 1s infinite;
}

.hero-subtitle {
  font-size: var(--fs-xl);
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-8);
}

.location {
  display: block;
  margin-top: var(--space-4);
  font-size: var(--fs-base);
  color: var(--text-muted);
}

.location i {
  color: var(--accent);
  margin-right: var(--space-2);
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 2px solid transparent;
  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: left var(--transition-slow);
}

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

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: var(--dark);
  transform: translateY(-3px);
}

.social-links {
  display: flex;
  gap: var(--space-4);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(0, 212, 255, 0.1);
  color: var(--primary);
  text-decoration: none;
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.social-link:hover {
  background: var(--primary);
  color: var(--dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.social-link i {
  font-size: var(--fs-lg);
}

/* ========================================
   Hero Visual - Code Window
======================================== */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.code-window {
  width: 100%;
  max-width: 500px;
  background: var(--dark-secondary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.window-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  background: var(--dark-tertiary);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.window-controls {
  display: flex;
  gap: var(--space-2);
}

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

.control.close {
  background: #ff5f56;
}

.control.minimize {
  background: #ffbd2e;
}

.control.maximize {
  background: #27ca3f;
}

.window-title {
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.code-content {
  padding: var(--space-6);
  background: var(--dark);
}

.code-block {
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
}

/* ========================================
   Scroll Indicator
======================================== */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  z-index: 2;
}

.scroll-arrow {
  animation: bounce 2s infinite;
}

.scroll-arrow i {
  font-size: var(--fs-lg);
  color: var(--primary);
}

.scroll-text {
  font-family: var(--font-primary);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ========================================
   Glitch Effect
======================================== */
.glitch {
  position: relative;
  display: inline-block;
}

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

.glitch::before {
  animation: glitch-1 2s infinite;
  color: var(--secondary);
  z-index: -1;
}

.glitch::after {
  animation: glitch-2 2s infinite;
  color: var(--primary);
  z-index: -2;
}

/* ========================================
   Section Styles
======================================== */
.main-content {
  padding-top: 70px;
}

section {
  padding: var(--space-20) 0;
  position: relative;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-title {
  font-family: var(--font-primary);
  font-size: var(--fs-4xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.title-number {
  color: var(--primary);
  font-size: var(--fs-2xl);
  margin-right: var(--space-2);
}

.section-subtitle {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   About Section
======================================== */
.about-section {
  background: var(--dark-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.text-block {
  margin-bottom: var(--space-8);
}

.text-block h3 {
  font-family: var(--font-primary);
  font-size: var(--fs-xl);
  color: var(--primary);
  margin-bottom: var(--space-4);
}

.text-block p {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: 1.8;
}

.learning-path {
  background: rgba(0, 212, 255, 0.05);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(0, 212, 255, 0.1);
}

.learning-path h4 {
  font-family: var(--font-primary);
  color: var(--accent);
  margin-bottom: var(--space-4);
}

.learning-items {
  display: grid;
  gap: var(--space-3);
}

.learning-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.learning-item i {
  color: var(--primary);
  width: 20px;
}

/* ========================================
   Profile Card
======================================== */
.profile-card {
  background: var(--dark-tertiary);
  padding: var(--space-8);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(0, 212, 255, 0.2);
  text-align: center;
}

.profile-image {
  position: relative;
  margin-bottom: var(--space-6);
}

.image-placeholder {
  width: 120px;
  height: 120px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  font-size: var(--fs-4xl);
  color: var(--dark);
}

.status-indicator {
  position: absolute;
  bottom: 0;
  right: 50%;
  transform: translateX(50%);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--dark);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 2px solid var(--accent);
  font-size: var(--fs-xs);
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.profile-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-family: var(--font-primary);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--primary);
  display: block;
}

.stat-label {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Continue with responsive design... */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--dark-secondary);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: left var(--transition-normal);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-toggle.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .profile-stats {
    grid-template-columns: 1fr 1fr;
  }
}