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

:root {
  --bg-primary: #030712;
  --bg-secondary: #0a0f1a;
  --bg-tertiary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(31, 41, 55, 0.8);
  
  --neon-cyan: #06b6d4;
  --neon-cyan-dim: rgba(6, 182, 212, 0.3);
  --neon-cyan-glow: rgba(6, 182, 212, 0.6);
  --neon-purple: #8b5cf6;
  --neon-purple-dim: rgba(139, 92, 246, 0.3);
  --neon-green: #10b981;
  --neon-orange: #f59e0b;
  --neon-red: #ef4444;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --border-color: rgba(6, 182, 212, 0.2);
  --border-glow: rgba(6, 182, 212, 0.5);
  
  --code-bg: #1e293b;
  
  --glass-bg: rgba(17, 24, 39, 0.6);
  --glass-border: rgba(255, 255, 255, 0.1);
  
  --sidebar-width: 280px;
  --header-height: 64px;
  --toc-width: 240px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Grid Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(90deg, var(--neon-cyan-dim) 1px, transparent 1px),
    linear-gradient(var(--neon-cyan-dim) 1px, transparent 1px);
  background-size: 50px 50px;
  background-position: center center;
  pointer-events: none;
  opacity: 0.15;
  z-index: -1;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

/* Gradient Orbs */
body::after {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse at 20% 20%, var(--neon-cyan-dim) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, var(--neon-purple-dim) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(16, 185, 129, 0.1) 0%, transparent 40%);
  pointer-events: none;
  z-index: -2;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Orbitron', 'Space Grotesk', sans-serif;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

h1 {
  font-size: 3rem;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.5rem;
  color: var(--neon-cyan);
  margin-bottom: 1rem;
}

h4 {
  font-size: 1.25rem;
  color: var(--text-primary);
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

a {
  color: var(--neon-cyan);
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--neon-purple);
  text-shadow: 0 0 10px var(--neon-cyan-glow);
}

/* Code Blocks */
code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  background: var(--code-bg);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--neon-cyan);
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  overflow-x: auto;
  position: relative;
  margin: 1.5rem 0;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.875rem;
  line-height: 1.6;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.75rem;
  transition: all 0.3s ease;
  font-family: 'Noto Sans SC', sans-serif;
}

.copy-btn:hover {
  background: var(--neon-cyan);
  color: var(--bg-primary);
  border-color: var(--neon-cyan);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  font-family: 'Noto Sans SC', sans-serif;
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  color: var(--bg-primary);
  border-color: var(--neon-cyan);
}

.btn-primary:hover {
  box-shadow: 0 0 20px var(--neon-cyan-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 15px var(--neon-cyan-dim);
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-purple), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 10px 40px rgba(6, 182, 212, 0.15);
}

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

/* Glass Effect */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

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

@keyframes glow {
  0%, 100% { box-shadow: 0 0 5px var(--neon-cyan-glow); }
  50% { box-shadow: 0 0 20px var(--neon-cyan-glow), 0 0 30px var(--neon-cyan-dim); }
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink {
  50% { border-color: transparent; }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.animate-slide-in {
  animation: slideIn 0.4s ease forwards;
}

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

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

/* Staggered Animation Delays */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

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

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

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

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

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

/* Utility Classes */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

.flex {
  display: flex;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }

.text-center { text-align: center; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-cyan { color: var(--neon-cyan); }
.text-purple { color: var(--neon-purple); }
.text-green { color: var(--neon-green); }

.font-mono { font-family: 'JetBrains Mono', monospace; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }

.p-2 { padding: 0.5rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }

.hidden { display: none; }
.block { display: block; }

.relative { position: relative; }
.absolute { position: absolute; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: 0.5rem; }
.rounded-lg { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }

.border { border: 1px solid var(--border-color); }
.border-t { border-top: 1px solid var(--border-color); }
.border-b { border-bottom: 1px solid var(--border-color); }

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-80 { opacity: 0.8; }

.transition { transition: all 0.3s ease; }

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 240px;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
}

@media (max-width: 768px) {
  :root {
    --sidebar-width: 0px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .container {
    padding: 0 1rem;
  }
}