:root { --brand:#0e5ab9; --text:#222; --muted:#666; --bg:#fff; --border:#e5e5e5; }
* { box-sizing: border-box; }
html, body { height: 100%; }
body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; margin: 0; color: var(--text); background: var(--bg); }

/* Header & Navigation */
.site-header { 
  display: flex; align-items: center; justify-content: space-between; 
  gap: 16px; padding: 14px 24px; 
  border-bottom: 1px solid var(--border); 
  position: sticky; top: 0; background: #fff; 
  z-index: 20;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15); /* Schatten hinzugefügt */
}
.logo { height: auto; width: auto; max-height: none; display: block; } /* Logo-Höhe begrenzt */
.main-nav a { color: var(--text); text-decoration: none; margin-left: 12px; padding: 8px 10px; border-radius: 6px; }
.main-nav a:hover, .main-nav a.active { background: #f3f6fb; color: var(--brand); }

/* Layout */
.container { max-width: 960px; margin: 0 auto; padding: 24px; }
.hero h1 { text-align: center; font-size: clamp(1.6rem, 2.5vw, 2.2rem); margin: 8px 0 10px; }
.hero p { max-width: 840px; margin: 12px auto; line-height: 1.6; color: var(--muted); }

/* Components */
.btn { background: var(--brand); color: #fff; text-decoration: none; padding: 10px 16px; border-radius: 8px; display: inline-block; }
.btn:hover { filter: brightness(0.97); }
.back { display: inline-block; margin: 16px 0; }
.member { border-bottom: 1px solid var(--border); padding: 16px 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 16px 24px; text-align: center; color: var(--muted); }
.site-footer a { color: var(--text); }

@media (max-width: 600px) {
  .main-nav a { margin-left: 8px; font-size: 14px; }
  .logo { height: auto; width: auto; max-height: none; display: block; }
}