@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&family=Orbitron:wght@400;500;700&display=swap');

:root {
  --primary-dark: #0f0f23; 
  --primary-blue: #1a1a2e; 
  --secondary-purple: #16213e; 
  --accent-neon-cyan: #00d4ff; 
  --accent-neon-pink: #ff006e; 
  --accent-neon-green: #00ff88; 
  --text-light: #e6e6e6; 
  --text-muted: #b0b0b0; 
  --bg-card: rgba(26, 26, 46, 0.9); 
  --bg-overlay: rgba(15, 15, 35, 0.8); 
  --border-glow: rgba(0, 212, 255, 0.3); 
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.2); 
  --font-heading: 'Orbitron', monospace;
  --font-body: 'Montserrat', sans-serif;
  --transition-fast: all 0.2s ease;
  --transition-normal: all 0.3s ease;
  --transition-slow: all 0.5s ease;
  --border-radius: 8px;
  --border-radius-large: 16px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --z-nav: 1000;
  --z-modal: 1050;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  opacity: 1 !important;
  visibility: visible !important;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 50%, var(--secondary-purple) 100%);
  background-attachment: fixed;
  color: var(--text-light);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

[data-aos] {
  opacity: 1 !important;
}

.menu-item, .card, .content-block {
  display: block !important;
  opacity: 1 !important;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--accent-neon-cyan);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 3rem; text-shadow: var(--shadow-glow); }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

a {
  color: var(--accent-neon-cyan);
  text-decoration: none;
  transition: var(--transition-normal);
}

a:hover {
  color: var(--accent-neon-pink);
  text-decoration: underline;
}

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

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -var(--spacing-sm);
}

.col {
  flex: 1;
  padding: 0 var(--spacing-sm);
}

.col-1 { flex: 0 0 8.333%; }
.col-2 { flex: 0 0 16.666%; }
.col-3 { flex: 0 0 25%; }
.col-4 { flex: 0 0 33.333%; }
.col-6 { flex: 0 0 50%; }
.col-8 { flex: 0 0 66.666%; }
.col-12 { flex: 0 0 100%; }

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--bg-overlay);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-glow);
  z-index: var(--z-nav);
  padding: var(--spacing-md) 0;
  transition: var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(15, 15, 35, 0.95);
  box-shadow: var(--shadow-glow);
}

.navbar-brand {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--accent-neon-cyan);
  font-weight: 700;
}

.navbar-nav {
  display: flex;
  list-style: none;
  margin-left: auto;
}

.nav-item {
  margin-left: var(--spacing-lg);
}

.nav-link {
  color: var(--text-light);
  font-weight: 500;
  transition: var(--transition-normal);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-neon-cyan);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-neon-cyan);
  transition: var(--transition-normal);
}

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

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: url('stylized_game_engine_interface.webp') no-repeat center center/cover;
  background-attachment: fixed;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, rgba(15, 15, 35, 0.7), rgba(26, 26, 46, 0.5));
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero h1 {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from { text-shadow: 0 0 10px var(--accent-neon-cyan); }
  to { text-shadow: 0 0 20px var(--accent-neon-cyan), 0 0 30px var(--accent-neon-cyan); }
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
}

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(135deg, var(--accent-neon-cyan), var(--accent-neon-pink));
  color: var(--primary-dark);
  font-weight: 600;
  text-transform: uppercase;
  border-radius: var(--border-radius-large);
  transition: var(--transition-normal);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--accent-neon-cyan);
  color: var(--accent-neon-cyan);
}

.btn-secondary:hover {
  background: var(--accent-neon-cyan);
  color: var(--primary-dark);
}

.card {
  background: var(--bg-card);
  backdrop-filter: blur(15px);
  border: 1px solid var(--border-glow);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
  transition: var(--transition-slow);
}

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

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.3);
  border-color: var(--accent-neon-cyan);
}

.card-title {
  color: var(--accent-neon-cyan);
  margin-bottom: var(--spacing-md);
}

.card-text {
  color: var(--text-muted);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-dark {
  background: var(--bg-overlay);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.skill-tree {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.skill-node {
  background: var(--bg-card);
  border: 2px solid var(--border-glow);
  border-radius: 50%;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--spacing-md);
  cursor: pointer;
  transition: var(--transition-normal);
  position: relative;
}

.skill-node:hover,
.skill-node.active {
  border-color: var(--accent-neon-cyan);
  box-shadow: var(--shadow-glow);
}

.skill-node.completed {
  background: var(--accent-neon-green);
  color: var(--primary-dark);
}

.concept-output {
  background: var(--bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-md);
  font-style: italic;
  color: var(--accent-neon-pink);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-control {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-overlay);
  border: 1px solid var(--border-glow);
  border-radius: var(--border-radius);
  color: var(--text-light);
  font-family: var(--font-body);
  transition: var(--transition-normal);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-neon-cyan);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.footer {
  background: var(--primary-blue);
  padding: var(--spacing-xl) 0;
  text-align: center;
  border-top: 1px solid var(--border-glow);
}

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

.fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .navbar-nav {
    flex-direction: column;
    margin-top: var(--spacing-md);
  }
  
  .nav-item {
    margin-left: 0;
    margin-bottom: var(--spacing-sm);
  }
  
  .row {
    flex-direction: column;
  }
  
  .col {
    flex: none;
    width: 100%;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.focus-visible:focus {
  outline: 2px solid var(--accent-neon-cyan);
  outline-offset: 2px;
}

@media print {
  body {
    background: white !important;
    color: black !important;
  }
  
  .navbar,
  .btn,
  .card::before {
    display: none !important;
  }
}