* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f8f8f8;
  color: #222;
  scroll-behavior: smooth;
}

.site-header {
  position: sticky;
  top: 0;
  background: #ffffff;
  border-bottom: 1px solid #ddd;
  padding: 16px 24px;
  z-index: 10;
}

.top-menu {
  display: flex;
  justify-content: flex-end;
  gap: 18px;
}

.top-menu a {
  text-decoration: none;
  color: #0d3b66;
  font-weight: bold;
}

.top-menu a:hover {
  text-decoration: underline;
}

.container {
  max-width: 980px;
  margin: 24px auto;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  padding: 24px;
}

section {
  scroll-margin-top: 90px;
}

.page-section {
  min-height: calc(100vh - 120px);
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.page-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html,
  body {
    scroll-behavior: auto;
  }

  .page-section {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

h1,
h2 {
  margin-top: 0;
}

.hero-image,
.content-image {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #ddd;
}

.lead {
  font-size: 1.1rem;
  line-height: 1.6;
}

ul,
ol {
  line-height: 1.7;
}