:root {
  --font-family: 'Roboto', sans-serif;
  --background-gradient-start: #E2F2FF;
  --background-gradient-end: #e2b4fd;
  --text-color: #333;
  --secondary-text-color: #555;
  --link-color: #1A73E8;
  --link-hover-color: #104E8B;
  --card-background: #FFFFFF;
  --card-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  --card-border-radius: 8px;
  --heading-color: #691ae8;
  --h2-border: #691ae8;
  --secondary-heading-color: #333;
  --hr-color: #DDD;
  --content-padding: 20px;
  --max-content-width: 800px;
  --default-line-height: 1.6;
  --transition-speed: 0.3s;
}

body {
  font-family: var(--font-family);
  background: linear-gradient(120deg, var(--background-gradient-start), var(--background-gradient-end));
  color: var(--text-color);
  margin: 0;
  padding: 0;
  line-height: var(--default-line-height);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

main {
  background: var(--card-background);
  max-width: var(--max-content-width);
  box-shadow: var(--card-shadow);
  border-radius: var(--card-border-radius);
  overflow: hidden;
  padding: var(--content-padding);
}

h1, h2 {
  font-weight: 700;
  margin-top: 0;
}

h1 {
  font-size: 2.5rem;
  text-align: center; /* Center-aligned heading */
  color: var(--heading-color);
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.75rem;
  border-left: 4px solid var(--h2-border); /* Decorative line */
  padding-left: 0.8rem;
  color: var(--secondary-heading-color);
  margin-bottom: 0.5rem;
}

p {
  color: var(--secondary-text-color);
  padding: 0.5rem 1rem;
  font-size: 1rem;
  line-height: 1.8;
}

ul {
  padding: 0 1.5rem;
  margin-bottom: 1rem;
}

li {
  margin: 0.5rem 0;
}

a {
  display: inline-block;
  color: var(--link-color);
  text-decoration: none;
  transition: all var(--transition-speed) ease-in-out;
}

a:hover {
  color: var(--link-hover-color);
  text-decoration: underline;
}

hr {
  border: none;
  height: 1px;
  background: var(--hr-color);
  margin: 2rem 0;
}

footer {
  text-align: center;
  font-size: 0.9rem;
  color: var(--secondary-text-color);
  margin-top: 2rem;
}

/* Responsive tweaks for mobile */
@media (max-width: 768px) {
  main {
    padding: 15px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }
}