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

:root {
  /* LIGHT MODE (Default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f4f4f9;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --accent-primary: #3b82f6;
  --accent-hover: #2563eb;
  --border-color: #e2e8f0;
  --card-bg: #ffffff;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --error-color: #ef4444;
  --success-color: #22c55e;
  
  --font-body: 'Inter', sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --nav-bg: rgba(255, 255, 255, 0.8);
  --glow-effects: none;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --accent-primary: #6366f1;
  --accent-hover: #818cf8;
  --border-color: #334155;
  --card-bg: #1e293b;
  --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --nav-bg: rgba(15, 23, 42, 0.8);
  --glow-effects: none;
}

[data-theme="cyberpunk"] {
  --bg-primary: #050510;
  --bg-secondary: #0a0a20;
  --text-primary: #e0e0ff;
  --text-secondary: #a0a0ff;
  --accent-primary: #ff00ff;
  --accent-hover: #00ffff;
  --border-color: #ff00ff;
  --card-bg: rgba(20, 0, 40, 0.6);
  --card-shadow: 0 0 15px rgba(255, 0, 255, 0.3), inset 0 0 20px rgba(0, 255, 255, 0.1);
  --error-color: #ff003c;
  --success-color: #00ffcc;

  --font-heading: 'Orbitron', sans-serif;
  
  --nav-bg: rgba(5, 5, 16, 0.8);
  --glow-effects: 0 0 10px var(--accent-primary), 0 0 20px var(--accent-hover);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  margin-bottom: 1rem;
}

a {
  text-decoration: none;
  color: var(--accent-primary);
  transition: color 0.3s ease;
}

a:hover {
  color: var(--accent-hover);
}

/* Cyberpunk specific body FX */
body[data-theme="cyberpunk"] {
  background-image: 
    linear-gradient(rgba(255, 0, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  animation: cyberGridMobile 15s linear infinite;
}

@keyframes cyberGridMobile {
  0% { background-position: 0 0; }
  100% { background-position: 30px 30px; }
}

/* Navbar */
header {
  position: fixed;
  top: 0;
  width: 100%;
  backdrop-filter: blur(10px);
  background: var(--nav-bg);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

[data-theme="cyberpunk"] .logo {
  text-transform: uppercase;
  gap: 0.8rem;
}

.logo span {
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: shine 3s linear infinite;
}

@keyframes shine {
  0% { background-position: 200% center; }
  100% { background-position: -200% center; }
}

[data-theme="cyberpunk"] .logo span {
  background: none;
  -webkit-text-fill-color: var(--text-primary);
  text-shadow: 0 0 10px var(--accent-primary);
  animation: glitch 2s infinite alternate-reverse;
}

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  box-shadow: 0 0 10px var(--accent-primary);
  object-fit: cover;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links li a {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 1.1rem;
  position: relative;
}

.nav-links li a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--accent-primary);
  transition: width 0.3s ease;
}

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

/* Theme Switcher */
.theme-switcher {
  display: flex;
  gap: 0.5rem;
  background: var(--bg-secondary);
  padding: 0.25rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.theme-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-btn.active {
  background: var(--accent-primary);
  color: #fff;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

[data-theme="cyberpunk"] .theme-btn.active {
  box-shadow: var(--glow-effects);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  font-family: var(--font-heading);
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

[data-theme="cyberpunk"] .btn-primary {
  background: transparent;
  border: 2px solid var(--accent-primary);
  color: var(--accent-primary);
  text-shadow: 0 0 5px var(--accent-primary);
  box-shadow: 0 0 10px inset var(--accent-primary), 0 0 10px var(--accent-primary);
}

[data-theme="cyberpunk"] .btn-primary:hover {
  background: var(--accent-primary);
  color: #000;
  box-shadow: 0 0 20px var(--accent-primary);
}

/* Sections */
section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding-top: 80px;
}

.hero-title {
  font-size: 4rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="cyberpunk"] .hero-title {
  background: none;
  -webkit-text-fill-color: var(--text-primary);
  text-shadow: 0 0 20px var(--accent-primary), -5px 0 10px var(--accent-hover);
  animation: glitch 2s infinite alternate-reverse;
}

@keyframes glitch {
  0% { text-shadow: 0.05em 0 0 rgba(255,0,0,0.75), -0.05em -0.025em 0 rgba(0,255,0,0.75), -0.025em 0.05em 0 rgba(0,0,255,0.75); }
  14% { text-shadow: 0.05em 0 0 rgba(255,0,0,0.75), -0.05em -0.025em 0 rgba(0,255,0,0.75), -0.025em 0.05em 0 rgba(0,0,255,0.75); }
  15% { text-shadow: -0.05em -0.025em 0 rgba(255,0,0,0.75), 0.025em 0.025em 0 rgba(0,255,0,0.75), -0.05em -0.05em 0 rgba(0,0,255,0.75); }
  49% { text-shadow: -0.05em -0.025em 0 rgba(255,0,0,0.75), 0.025em 0.025em 0 rgba(0,255,0,0.75), -0.05em -0.05em 0 rgba(0,0,255,0.75); }
  50% { text-shadow: 0.025em 0.05em 0 rgba(255,0,0,0.75), 0.05em 0 0 rgba(0,255,0,0.75), 0 -0.05em 0 rgba(0,0,255,0.75); }
  99% { text-shadow: 0.025em 0.05em 0 rgba(255,0,0,0.75), 0.05em 0 0 rgba(0,255,0,0.75), 0 -0.05em 0 rgba(0,0,255,0.75); }
  100% { text-shadow: -0.025em 0 0 rgba(255,0,0,0.75), -0.025em -0.025em 0 rgba(0,255,0,0.75), -0.025em -0.05em 0 rgba(0,0,255,0.75); }
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2rem;
}

.typing-animation {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--accent-hover);
  min-height: 2.5rem;
  margin-bottom: 2rem;
  border-right: 2px solid var(--accent-hover);
  padding-right: 5px;
  animation: blink 0.75s step-end infinite;
}

@keyframes blink {
  from, to { border-color: transparent }
  50% { border-color: var(--accent-hover); }
}

/* Features Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

[data-theme="cyberpunk"] .feature-card:hover {
  box-shadow: 0 0 20px var(--accent-primary);
  border-color: var(--accent-hover);
}

.feature-card i {
  font-size: 2.5rem;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

/* Typing Tool Container */
.tool-container {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 3rem;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
  margin-top: 2rem;
}

[data-theme="cyberpunk"] .tool-container {
  position: relative;
  overflow: hidden;
}

[data-theme="cyberpunk"] .tool-container::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  animation: scanline 2s linear infinite;
}

@keyframes scanline {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.typing-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.stats-bar {
  display: flex;
  gap: 2rem;
}

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

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-primary);
}

.timer-options {
  display: flex;
  gap: 1rem;
}

.timer-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-primary);
  font-family: var(--font-mono);
  transition: all 0.2s;
}

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

.typing-area {
  position: relative;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1.8;
  margin-bottom: 2rem;
  height: 150px;
  overflow: hidden;
  user-select: none;
}

.words-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.word {
  display: inline-flex;
}

.letter {
  transition: color 0.1s;
}

.letter.correct {
  color: var(--text-primary);
}

[data-theme="cyberpunk"] .letter.correct {
  color: var(--success-color);
  text-shadow: 0 0 5px var(--success-color);
}

.letter.incorrect {
  color: var(--error-color);
  background-color: rgba(239, 68, 68, 0.2);
  border-radius: 2px;
}

[data-theme="cyberpunk"] .letter.incorrect {
  background: transparent;
  text-shadow: 0 0 8px var(--error-color);
}

.cursor {
  position: absolute;
  width: 2px;
  height: 1.8rem;
  background-color: var(--accent-primary);
  animation: blink 1s infinite;
  transition: left 0.1s, top 0.1s;
  pointer-events: none;
}

.hidden-input {
  position: absolute;
  opacity: 0;
  top: -9999px;
  left: -9999px;
}

.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-secondary);
  border-radius: 3px;
  margin-bottom: 2rem;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent-primary);
  width: 100%;
  transition: width 1s linear;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  padding: 4rem 2rem 2rem;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.8rem;
}

.footer-col ul li a {
  color: var(--text-secondary);
}

.footer-col ul li a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

/* Utilities */
.text-center { text-align: center; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.d-none { display: none !important; }

/* Virtual Keyboard (Course Assist) */
.virtual-keyboard {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 2rem;
  box-shadow: inset 0 2px 5px rgba(0,0,0,0.05);
  font-family: var(--font-mono);
  user-select: none;
}

.vk-row {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.vk-key {
  width: 40px;
  height: 40px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  box-shadow: 0 4px 0 var(--border-color);
  color: var(--text-secondary);
  transition: all 0.1s;
  position: relative;
  overflow: hidden;
}

.vk-key.active {
  color: #fff;
  transform: translateY(2px);
  box-shadow: 0 2px 0 var(--border-color), 0 0 15px currentColor;
  z-index: 2;
}

.vk-key.pressed {
  transform: translateY(4px);
  box-shadow: 0 0 0 var(--border-color);
  opacity: 0.8;
}

.vk-wide { width: 60px; }
.vk-wider { width: 75px; }
.vk-widest { width: 100px; }
.vk-space { width: 300px; }

/* Finger Guide Dots & Colors */
.finger-guide { margin-bottom: 1.5rem; font-size: 0.85rem; color: var(--text-secondary); }
.finger-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; vertical-align: middle; }

/* Hand mappings mapping to standard touch typing rows */
.finger-l-pinky { background-color: rgba(239, 68, 68, 0.1); border-color: #ef4444; color: #ef4444; }
.finger-l-ring { background-color: rgba(234, 179, 8, 0.1); border-color: #eab308; color: #eab308; }
.finger-l-middle { background-color: rgba(34, 197, 94, 0.1); border-color: #22c55e; color: #22c55e; }
.finger-l-index { background-color: rgba(59, 130, 246, 0.1); border-color: #3b82f6; color: #3b82f6; }
.finger-thumb { background-color: rgba(100, 116, 139, 0.1); border-color: #64748b; color: #64748b; }
.finger-r-index { background-color: rgba(168, 85, 247, 0.1); border-color: #a855f7; color: #a855f7; }
.finger-r-middle { background-color: rgba(236, 72, 153, 0.1); border-color: #ec4899; color: #ec4899; }
.finger-r-ring { background-color: rgba(20, 184, 166, 0.1); border-color: #14b8a6; color: #14b8a6; }
.finger-r-pinky { background-color: rgba(6, 182, 212, 0.1); border-color: #06b6d4; color: #06b6d4; }

/* In cyberpunk, bump up the neon glow for colored keys */
[data-theme="cyberpunk"] .vk-key { background: transparent; border-width: 2px; }
[data-theme="cyberpunk"] .vk-key.active { background: currentColor; color: #000; box-shadow: 0 0 20px currentColor, inset 0 0 10px #000; }

/* Responsive */
@media (max-width: 768px) {
  .hero-title { font-size: 2.5rem; }
  .typing-area { font-size: 1.2rem; height: 120px; }
  .nav-links { display: none; }
  .stats-bar { flex-direction: column; gap: 1rem; }
}

/* Dino Game Overlay */
#game-overlay {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(5, 5, 16, 0.95);
  backdrop-filter: blur(5px);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s;
}

#game-overlay.active {
  opacity: 1;
  pointer-events: all;
}

#dino-canvas {
  border: 2px solid var(--accent-primary);
  box-shadow: 0 0 20px var(--accent-primary);
  background: #000;
  max-width: 100%;
}

.game-header {
  color: var(--accent-primary);
  font-family: var(--font-heading);
  text-align: center;
  margin-bottom: 1rem;
}

.close-game {
  position: absolute;
  top: 2rem;
  right: 2rem;
  background: none;
  border: none;
  color: var(--error-color);
  font-size: 2rem;
  cursor: pointer;
  text-shadow: 0 0 10px var(--error-color);
}

/* Blog Styles */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.blog-card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: transform 0.3s;
}

.blog-card:hover {
  transform: translateY(-5px);
}

.blog-img {
  width: 100%;
  height: 200px;
  background: var(--bg-secondary);
  object-fit: cover;
}

.blog-content {
  padding: 1.5rem;
}

.blog-date {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  display: block;
}

.blog-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.blog-title a {
  color: var(--text-primary);
}

.blog-title a:hover {
  color: var(--accent-primary);
}

/* Article Page */
.article-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3rem;
  padding-top: 80px;
}

.article-content {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
}

.article-content h2, .article-content h3 {
  margin-top: 2rem;
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}