:root {
  --color-text: #1a1a1a;
  --color-text-muted: #5a5a5a;
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7f9;
  --color-primary: #1e3a5f;
  --color-primary-hover: #294f80;
  --color-border: #e5e7eb;
  --max-width: 880px;
  --radius: 8px;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding-top: 12px;
  padding-bottom: 12px;
  gap: 16px;
  flex-wrap: wrap;
}
.logo {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  text-decoration: none;
}
.site-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}
.site-nav a:hover {
  color: var(--color-primary);
}

/* Hero */
.hero {
  background: linear-gradient(180deg, #f6f8fc 0%, #ffffff 100%);
  padding: 72px 0 56px;
  text-align: center;
}
.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.01em;
}
.hero .lead {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

/* Sections */
.section {
  padding: 56px 0;
}
.section-alt {
  background: var(--color-bg-alt);
}
.section h2 {
  margin: 0 0 20px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  border-left: 4px solid var(--color-primary);
  padding-left: 12px;
}
.section p {
  margin: 0 0 12px;
}
.section p.en {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 8px;
}
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}
.card h3 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  color: var(--color-primary);
}
.card-en {
  display: block;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}
.card p {
  margin: 0 0 8px;
  font-size: 0.95rem;
}
.card p.en {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Product */
.product {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}
.product h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  color: var(--color-primary);
}

/* Contact list */
.contact-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
}
.contact-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}
.contact-list li:last-child {
  border-bottom: 0;
}
.contact-list a {
  color: var(--color-primary);
}
.placeholder {
  color: #a16207;
  font-style: italic;
}

/* Legal pages */
.legal {
  padding: 56px 0;
}
.legal h1 {
  margin: 0 0 8px;
  font-size: 1.7rem;
  color: var(--color-primary);
}
.legal h2 {
  margin: 32px 0 12px;
  font-size: 1.15rem;
  color: var(--color-primary);
}
.legal .effective {
  margin: 0 0 28px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.legal p {
  margin: 0 0 12px;
}
.legal ul {
  margin: 0 0 12px 1.2em;
  padding: 0;
}
.legal hr {
  margin: 56px 0;
  border: 0;
  border-top: 1px solid var(--color-border);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  background: var(--color-bg);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
}
.footer-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer-nav a:hover {
  color: var(--color-primary);
}

/* Links */
a {
  color: var(--color-primary);
}
a:hover {
  color: var(--color-primary-hover);
}

/* Small screens */
@media (max-width: 600px) {
  .header-inner { min-height: auto; }
  .hero { padding: 48px 0 36px; }
  .section { padding: 40px 0; }
  .legal { padding: 40px 0; }
}