html, body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--background);
  color: var(--text);
  line-height: 1.6;
  scroll-behavior: smooth;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

body {
  flex: 1;
}

a {
  text-decoration: none;
}

.hidden-content {
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  flex: 1;
}

h1, h2, h3 {
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary);
  text-align: center;
}