:root {
      --max-width: 760px;
      --line-height: 1.6;
      --spacing: 1.4rem;
    }

    body {
      font-family: system-ui, sans-serif;
      line-height: var(--line-height);
      margin: 0;
      padding: 2rem 1rem;
      display: flex;
      justify-content: center;
    }

    main {
      max-width: var(--max-width);
      width: 100%;
    }

    h1, h2, h3 {
      line-height: 1.2;
    }

    section {
      margin-top: 2.5rem;
    }

    ul {
      padding-left: 1.2rem;
    }

    footer {
      margin-top: 3rem;
      font-size: 0.9rem;
      opacity: 0.7;
    }

    .principle {
      margin-bottom: 1.2rem;
    }

    .social-links {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0 0;
  display: flex;
  gap: 1rem;
}

.social-links a {
  font-size: 1.4rem;
  text-decoration: none;
  opacity: 0.8;
  transition: opacity 0.2s ease, transform 0.15s ease;
}

.social-links a:hover {
  opacity: 1;
  transform: translateY(-2px);
}