body {
  margin: 0;
  font-family: sans-serif;
  background: linear-gradient(135deg, #ff758c, #ff7eb3);
  color: white;
  text-align: center;
}

/* Center screen */
.center {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Gift */
.gift {
  font-size: 80px;
  cursor: pointer;
  animation: bounce 1s infinite;
}

@keyframes bounce {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

.hidden {
  display: none;
}

h1 {
  margin-top: 20px;
  font-size: 2rem;
}

/* Message */
#message {
  padding: 15px;
  font-size: 1.2rem;
}

/* Slideshow */
.slideshow img {
  width: 80%;
  max-width: 300px;
  border-radius: 20px;
  margin-top: 20px;
  transition: 0.5s;
}

/* Hearts */
.heart {
  position: fixed;
  bottom: -10px;
  animation: float 5s linear infinite;
}

@keyframes float {
  to {
    transform: translateY(-100vh);
    opacity: 0;
  }
}