:root {
  --color-bg: #0b1220;
  --color-bg-alt: #111a2e;
  --color-text: #e8ecf4;
  --color-text-muted: #9aa5b8;
  --color-accent: #c9a24b;
  --color-border: #223049;
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Segoe UI", system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

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

a:hover {
  text-decoration: underline;
}

header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.hero {
  padding: 3rem 0 2rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.hero p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
}

.section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.section h2 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--color-accent);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.25rem;
}

.card h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

footer {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
}

.legal-doc h1 {
  font-size: 1.6rem;
}

.legal-doc h2 {
  font-size: 1.15rem;
  color: var(--color-accent);
  margin-top: 2rem;
}

.legal-doc .updated {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.placeholder-note {
  background: #2a2311;
  border: 1px solid #5a4a1c;
  color: #f0d99a;
  padding: 0.9rem 1.1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  margin: 1.5rem 0;
}