:root {
  --primary-color: #007bff;
  --text-color: #333;
  --background-color: #fff;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text-color);
  background: var(--background-color);
  line-height: 1.5;
}

.main-content {
  opacity: 1;
  transition: opacity 0.3s ease;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: 500;
  line-height: 1.2;
}

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

a:hover {
  color: darken(var(--primary-color), 10%);
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  background: var(--primary-color);
  color: white;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (max-width: 768px) {
  .container {
    padding: 0 0.5rem;
  }
}

.lazy-load {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lazy-load.loaded {
  opacity: 1;
}