/* Layout F & UI Style 5 */
body.ui-style-5 {
  font-size: 16px;
}

body.ui-style-5 a:hover {
  color: #1e40af;
}

body.ui-style-5 .card:hover {
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.2);
}

@media (max-width: 768px) {
  body { font-size: 14px; }
}

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #2563eb;
  color: #fff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  transition: opacity 0.3s;
}

.back-to-top:hover {
  opacity: 0.8;
}

.back-to-top.show {
  display: flex;
}