#mr-portfolio-btn {
  position: fixed; top: 12px; right: 12px; z-index: 2147483000;
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .42rem .8rem; border-radius: 999px;
  font: 600 13px/1 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #e8edf5; text-decoration: none; white-space: nowrap;
  background: rgba(18,24,38,.92);
  border: 1px solid rgba(88,166,255,.45);
  box-shadow: 0 2px 12px rgba(0,0,0,.35);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  transition: transform .15s, border-color .15s, background .15s;
}
#mr-portfolio-btn:hover {
  transform: translateY(-1px); color: #fff; text-decoration: none;
  background: rgba(24,32,50,.96); border-color: #58a6ff;
}
#mr-portfolio-btn:focus-visible { outline: 2px solid #58a6ff; outline-offset: 2px; }
@media (max-width: 520px) {
  #mr-portfolio-btn { padding: .45rem; }
  #mr-portfolio-btn span { display: none; }
}
@media print { #mr-portfolio-btn { display: none; } }