/* Reset & base */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Hiragino Sans', 'Yu Gothic', 'Noto Sans JP', system-ui, sans-serif;
  background: #fafaf7;
  color: #1a1a1a;
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid #e5e5e0;
  padding: 16px 24px;
}
.site-header .inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header a {
  color: inherit;
  text-decoration: none;
}
.site-header .brand {
  font-size: 14px;
  color: #64748b;
}
.site-header .brand strong {
  color: #1a1a1a;
  font-weight: 700;
  margin-right: 8px;
}
.site-header nav {
  font-size: 13px;
  display: flex;
  gap: 16px;
}
.site-header nav a {
  color: #64748b;
}
.site-header nav a:hover {
  color: #0b5345;
}

/* Main */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px;
}
h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #0b5345;
}
.subtitle {
  font-size: 14px;
  color: #64748b;
  margin-bottom: 32px;
}
h2 {
  font-size: 18px;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid #0b5345;
  color: #1a1a1a;
}
h3 {
  font-size: 16px;
  font-weight: 700;
  margin-top: 20px;
  margin-bottom: 8px;
  color: #1a1a1a;
}
p {
  margin-bottom: 12px;
}
ul, ol {
  margin-left: 24px;
  margin-bottom: 12px;
}
ol li, ul li { margin-bottom: 4px; }
ol ol { margin-top: 4px; margin-bottom: 4px; }
strong { font-weight: 700; }

/* Definition list for 特商法 */
dl.legal-dl {
  margin-bottom: 16px;
}
dl.legal-dl dt {
  font-weight: 700;
  margin-top: 16px;
  color: #1a1a1a;
}
dl.legal-dl dd {
  margin-left: 0;
  color: #1a1a1a;
  white-space: pre-line;
}

/* Footer */
footer {
  max-width: 800px;
  margin: 48px auto 0;
  padding: 24px;
  border-top: 1px solid #e5e5e0;
  font-size: 13px;
  color: #64748b;
  text-align: center;
}
footer a {
  color: #64748b;
  text-decoration: none;
}
footer a:hover {
  color: #0b5345;
}

/* Cards on index */
.card-grid {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}
.card {
  display: block;
  background: #ffffff;
  border: 1px solid #e5e5e0;
  border-radius: 8px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s;
}
.card:hover {
  border-color: #0b5345;
}
.card h3 {
  margin-top: 0;
  color: #0b5345;
}
.card p {
  font-size: 14px;
  color: #64748b;
  margin: 0;
}

/* Article meta */
.meta {
  font-size: 13px;
  color: #64748b;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid #e5e5e0;
  text-align: right;
}

@media (max-width: 600px) {
  main { padding: 32px 16px; }
  h1 { font-size: 24px; }
  h2 { font-size: 16px; }
  .site-header { padding: 12px 16px; }
  .site-header nav { gap: 12px; font-size: 12px; }
}