:root {
  --color-main: #1f3a5f;
  --color-sub: #e8eef5;
  --color-accent: #c97b84;
  --color-bg: #fafbfc;
  --color-text: #222222;
  --color-muted: #5f6b7a;
  --color-border: #d7dfe8;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-soft: 0 8px 24px rgba(31, 58, 95, 0.08);
  --container: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
}

a {
  color: var(--color-main);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-main);
  color: #fff;
  padding: 0.5rem 0.8rem;
  z-index: 1000;
}

.skip-link:focus {
  top: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.72rem 1.2rem;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-main);
  color: #fff;
}

.btn-secondary {
  border-color: var(--color-main);
  color: var(--color-main);
  background: #fff;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.25rem;
}

section {
  padding: 2.8rem 0;
}

.small {
  font-size: 0.88rem;
  color: var(--color-muted);
}

.copy {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: #607086;
}