* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; line-height: 1.7; color: #1a1a1a; background: #fff; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
header { border-bottom: 1px solid #e5e5e5; padding: 1rem 0; }
.header-inner { max-width: 720px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.5rem; font-weight: 700; color: #1a1a1a; }
header nav a { margin-left: 2rem; color: #666; font-weight: 500; }
header nav a:hover { color: #1a1a1a; text-decoration: none; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: #666; padding: 0.25rem; }
.breadcrumb { max-width: 720px; margin: 0 auto; padding: 0.75rem 20px; font-size: 0.85rem; color: #999; }
.breadcrumb a { color: #888; }
.breadcrumb a:hover { color: #2563eb; }
.breadcrumb span { margin: 0 0.25rem; }
main { max-width: 720px; margin: 0 auto; padding: 2rem 20px 3rem; }
h1 { font-size: 2.2rem; line-height: 1.2; margin-bottom: 1rem; }
.byline { font-size: 0.85rem; color: #888; margin-bottom: 2rem; margin-top: -0.5rem; }
.byline .byline-link { display: inline-flex; align-items: center; gap: 0.4rem; color: #555; font-weight: 500; text-decoration: none; }
.byline .byline-link:hover { color: #2563eb; }
.byline-img { width: 28px; height: 28px; border-radius: 50%; vertical-align: middle; }
.article-date { font-size: 0.85rem; color: #999; margin-top: -0.5rem; margin-bottom: 1.5rem; }
.article-img { margin: 1.5rem 0; }
.article-img img { width: 100%; height: auto; border-radius: 6px; }
.article-img figcaption { font-size: 0.85rem; color: #666; margin-top: 0.75rem; font-style: italic; line-height: 1.5; }
.author-header { display: flex; align-items: center; gap: 1.5rem; margin-bottom: 1.5rem; }
.author-portrait { width: 200px; height: 200px; border-radius: 50%; flex-shrink: 0; }
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem 1.5rem; margin: 2rem 0; }
.team-card { text-align: center; }
.team-card img { width: 120px; height: 120px; border-radius: 50%; margin-bottom: 0.75rem; }
.team-card h3 { margin-bottom: 0.25rem; font-size: 1rem; }
.team-card h3 a { color: #1a1a1a; }
.team-card h3 a:hover { color: #2563eb; }
.team-card p { color: #555; font-size: 0.85rem; line-height: 1.5; }
@media (max-width: 600px) { .team-grid { grid-template-columns: repeat(2, 1fr); } }
h2 { font-size: 1.5rem; margin-top: 2.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.2rem; margin-top: 2rem; }
p { margin-bottom: 1.2rem; }
ul, ol { margin-bottom: 1.2rem; padding-left: 1.5rem; }
li { margin-bottom: 0.5rem; }
table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #e5e5e5; }
th { background: #f9f9f9; font-weight: 600; }
.cta, .cta-button { background: #2563eb; color: white !important; padding: 12px 24px; text-decoration: none; border-radius: 6px; display: inline-block; margin: 1rem 0; }
.cta:hover, .cta-button:hover { background: #1d4ed8; text-decoration: none; }
footer { background: #1a1a1a; color: #fff; padding: 2rem 20px; margin-top: 3rem; }
.footer-inner { max-width: 720px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1.5rem; }
.footer-col h4 { margin-bottom: 0.75rem; font-size: 0.95rem; }
.footer-col a { display: block; color: #999; margin-bottom: 0.4rem; font-size: 0.85rem; }
.footer-col a:hover { color: #fff; text-decoration: none; }
.footer-bottom { max-width: 720px; margin: 1.5rem auto 0; padding-top: 1.5rem; border-top: 1px solid #333; color: #666; font-size: 0.8rem; }
.popup-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: none; justify-content: center; align-items: center; z-index: 1000; }
.popup { background: #fff; padding: 2.5rem; border-radius: 12px; max-width: 420px; width: 90%; position: relative; }
.popup-close { position: absolute; top: 1rem; right: 1rem; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: #999; }
.popup h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.popup p { color: #666; margin-bottom: 1.5rem; }
.popup input[type="email"] { width: 100%; padding: 0.875rem; border: 2px solid #e5e5e5; border-radius: 6px; font-size: 1rem; margin-bottom: 1rem; }
.popup button[type="submit"] { width: 100%; padding: 0.875rem; background: #2563eb; color: #fff; border: none; border-radius: 6px; font-size: 1rem; font-weight: 600; cursor: pointer; }
.popup button[type="submit"]:hover { background: #1d4ed8; }
.popup .success { color: #059669; font-weight: 500; }

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  header nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; border-bottom: 1px solid #e5e5e5; padding: 1rem 20px; flex-direction: column; }
  header nav.open { display: flex; }
  header nav a { margin: 0; padding: 0.5rem 0; }
  .header-inner { position: relative; }
  h1 { font-size: 1.7rem; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}