:root {
  color-scheme: light;
  --ink: #13233a;
  --muted: #536477;
  --surface: #ffffff;
  --canvas: #f5f8fb;
  --line: #d9e2ec;
  --accent: #176b87;
  --accent-dark: #0d5069;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

a { color: var(--accent-dark); }
a:hover { color: var(--accent); }

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 2;
  padding: .5rem .75rem;
  background: #fff;
  border: 2px solid var(--accent);
}

.site-header {
  background: var(--ink);
  color: #fff;
  border-bottom: 4px solid var(--accent);
}

.wrap {
  width: min(100% - 2rem, 860px);
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 74px;
}

.brand {
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.site-nav { display: flex; gap: 1rem; }
.site-nav a { color: #fff; font-size: .95rem; }

main { padding: 3rem 0 4rem; }

.panel {
  padding: clamp(1.5rem, 4vw, 3rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 12px 30px rgb(19 35 58 / 7%);
}

.eyebrow {
  margin: 0 0 .5rem;
  color: var(--accent-dark);
  font-size: .88rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}

h1, h2 { line-height: 1.25; }
h1 { margin: 0; font-size: clamp(2rem, 6vw, 3.2rem); }
h2 { margin-top: 2.25rem; font-size: 1.35rem; }

.lead { max-width: 52rem; color: var(--muted); font-size: 1.15rem; }
.notice { padding: 1rem 1.15rem; background: #e9f6fa; border-left: 4px solid var(--accent); }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: 2rem 0;
}

.button {
  display: inline-block;
  padding: .65rem 1rem;
  color: #fff;
  background: var(--accent-dark);
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
}

.button:hover { color: #fff; background: var(--accent); }

.site-footer { padding: 0 0 2rem; color: var(--muted); font-size: .9rem; }
.site-footer p { margin: 0; }

@media (max-width: 560px) {
  .header-inner { padding: .8rem 0; align-items: flex-start; flex-direction: column; }
  .site-nav { gap: .75rem; }
  main { padding-top: 1.25rem; }
}