:root {
  --primary: #1A1A1A;
  --secondary: #00FF00;
  --background: #121212;
  --footer-bg: #0A0A0A;
  --button: #00FF00;
  --section-bg-1: #1A1A1A;
  --section-bg-2: #252525;
  --section-bg-3: #2D2D2D;
  --section-bg-4: #333333;
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --neon-glow: 0 0 10px rgba(0, 255, 0, 0.8);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@font-face {
  font-family: 'Neon';
  src: url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700&display=swap');
}

body {
  background-color: var(--background);
  color: var(--text-primary);
  font-family: 'Orbitron', sans-serif;
  line-height: 1.8;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: 700;
}

h1 {
  font-size: 3.5rem;
  text-shadow: var(--neon-glow);
  margin-bottom: 2rem;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--secondary);
  box-shadow: var(--neon-glow);
}

p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 65ch;
}

a {
  color: var(--secondary);
  text-decoration: none;
  transition: var(--transition);
  position: relative;
}

a:hover {
  color: white;
  text-shadow: var(--neon-glow);
}

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  background-color: transparent;
  color: var(--secondary);
  border: 2px solid var(--secondary);
  border-radius: 0;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: var(--transition);
  box-shadow: var(--neon-glow);
  position: relative;
  overflow: hidden;
}

.btn:hover {
  background-color: var(--secondary);
  color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 0 20px rgba(0, 255, 0, 0.6);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 0, 0.2), transparent);
  transition: 0.5s;
}

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

.section-bg-1 {
  background-color: var(--section-bg-1);
}

.section-bg-2 {
  background-color: var(--section-bg-2);
}

.section-bg-3 {
  background-color: var(--section-bg-3);
}

.section-bg-4 {
  background-color: var(--section-bg-4);
}

.card {
  background-color: var(--primary);
  border: 1px solid rgba(0, 255, 0, 0.1);
  transition: var(--transition);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px rgba(0, 255, 0, 0.2);
  border-color: var(--secondary);
}

.graph-placeholder {
  background: linear-gradient(135deg, var(--section-bg-2), var(--section-bg-3));
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.graph-placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 20px,
    rgba(0, 255, 0, 0.05) 20px,
    rgba(0, 255, 0, 0.05) 21px
  );
}

footer {
  background-color: var(--footer-bg);
  padding: 4rem 0;
  border-top: 1px solid rgba(0, 255, 0, 0.1);
}

footer a:hover {
  text-shadow: 0 0 8px var(--secondary);
}

@keyframes pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

.neon-pulse {
  animation: pulse 2s infinite;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  .btn {
    padding: 0.8rem 1.8rem;
  }
}