body {
  margin: 0;
  font-family: sans-serif;
}
#promoBtn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 12px 20px;
  background-color: #e63946;
  color: #fff;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  z-index: 999;
}

.popup-overlay {
  visibility: hidden;
  opacity: 0;
  transition: all 0.4s;
  position: fixed;
  z-index: 1000;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
  display: flex;
  justify-content: center;
  align-items: center;
}

.popup-overlay.show {
  visibility: visible;
  opacity: 1;
}

.popup-content {
  background: #fff;
  padding: 15px;
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
  position: relative;
  text-align: center;
}

.slider {
  position: relative;
}

.slide {
  display: none;
  width: 100%;
  border-radius: 12px;
}
.slide.active {
  display: block;
}

.nav {
  position: absolute;
  top: 45%;
  background: rgba(0,0,0,0.4);
  color: #fff;
  border: none;
  font-size: 24px;
  padding: 8px 12px;
  cursor: pointer;
}
.nav.prev {
  left: 10px;
}
.nav.next {
  right: 10px;
}

.popup-buttons {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
}
.booking-btn, .close-btn {
  flex: 1;
  margin: 0 4px;
  padding: 10px;
  border: none;
  border-radius: 8px;
  color: #fff;
  font-weight: bold;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}
.booking-btn {
  background-color: #25D366;
}
.close-btn {
  background-color: #1d3557;
}