:root {
  --presence-bg: #fff;
  --presence-text: #1a1a1a;
  --presence-muted: #6b7280;
  --presence-border: #e5e7eb;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--presence-font-body);
  color: var(--presence-text);
  background: var(--presence-bg);
  line-height: 1.6;
}
h1, h2, h3 { font-family: var(--presence-font-heading); margin: 0 0 0.6em; }
a { color: var(--presence-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.presence-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.5rem; border-bottom: 1px solid var(--presence-border);
}
.presence-logo { height: 40px; width: auto; }
.presence-logo-text { font-family: var(--presence-font-heading); font-size: 1.4rem; font-weight: 700; }
.presence-nav a { margin-left: 1.5rem; color: var(--presence-text); }
.presence-main { max-width: 960px; margin: 0 auto; padding: 2rem 1.5rem; }
.presence-hero { min-height: 60vh; display: flex; align-items: center; justify-content: center; }
.presence-chat-island { width: 100%; max-width: 720px; min-height: 400px; }
.presence-section { margin-top: 4rem; }
.presence-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; margin-top: 1.5rem; }
.presence-card { display: block; padding: 1rem; border: 1px solid var(--presence-border); border-radius: 8px; color: inherit; }
.presence-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); text-decoration: none; }
.presence-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 4px; margin-bottom: 0.75rem; }
.presence-article { max-width: 720px; margin: 0 auto; }
.presence-cover { width: 100%; height: auto; border-radius: 8px; margin-bottom: 1.5rem; }
.presence-body p { margin: 1em 0; }
.presence-body img { max-width: 100%; height: auto; }
.presence-footer {
  border-top: 1px solid var(--presence-border);
  padding: 2rem 1.5rem; text-align: center; color: var(--presence-muted);
  margin-top: 4rem;
}
.presence-attribution { margin-top: 1rem; font-size: 0.85rem; }
@media (max-width: 600px) {
  .presence-nav a { margin-left: 0.8rem; font-size: 0.9rem; }
  .presence-main { padding: 1.5rem 1rem; }
}