.pf-btn {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: #FFEFAD;
  color: #000;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  cursor: pointer;
  z-index: 10;
  box-shadow: 0 1px 6px rgba(0,0,0,0.1);
  display: flex;
  align-items: center;
  gap: 5px;
}
@media (min-width: 769px) {
  .pf-btn { bottom: 32px; right: 110px; }
}
.pf-overlay {
  position: fixed;
  top: 0; right: -100%; width: 85%; height: 100%;
  background: #fff;
  box-shadow: -4px 0 20px rgba(0,0,0,0.15);
  padding: 48px 24px 40px;
  transition: right 0.3s ease;
  z-index: 9999;
  overflow-y: auto;
  box-sizing: border-box;
}
@media (min-width: 769px) {
  .pf-overlay { width: 420px; right: -420px; }
  .pf-overlay.open { right: 0; }
  .pf-btn {
    bottom: 36px;
    right: 24px;
    }
}
@media (max-width: 768px) {
  .pf-overlay.open { right: 0; }
}
.pf-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 9998;
}
.pf-backdrop.open { display: block; }
.pf-close {
  position: absolute;
  bottom: 16px; right: 16px;
  background: #FFF;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  color: #333;
}
.pf-close:hover { background: #f5f5f5; }