:root {
  --primary: #000000;
  --secondary: #FFFFFF;
  --background: #000000;
  --footer-bg: #1A1A1A;
  --button: #0066CC;
  --section-bg-1: #0D0D0D;
  --section-bg-2: #1A1A1A;
  --section-bg-3: #262626;
  --font-main: 'Helvetica Neue', sans-serif;
}

body {
  font-family: var(--font-main);
  background-color: var(--background);
  color: var(--secondary);
  line-height: 1.8;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.025em;
  margin: 2rem 0 1rem;
}

h1 {
  font-size: 3.5rem;
  line-height: 1.1;
}

h2 {
  font-size: 2.5rem;
}

p {
  margin-bottom: 1.5rem;
  max-width: 65ch;
}

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

a:hover {
  opacity: 0.8;
}

.btn {
  display: inline-block;
  background-color: var(--button);
  color: var(--secondary);
  padding: 1rem 2rem;
  border-radius: 0;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

.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);
}

.parallax-section {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

footer {
  background-color: var(--footer-bg);
  padding: 4rem 0;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
  }
}