body, html {
  margin: 0;
  padding: 0;
  font-family: 'Times New Roman', serif;
  overflow-x: hidden;
}

.slide {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: #fef7e0;
}

img {
  max-width: 90%;
  max-height: 80%;
  object-fit: contain;
}

.landing-slide h1 {
  font-size: 3em;
  color: #222;
  text-shadow: 0 0 10px gold, 0 0 20px orange;
}

.last-slide {
  position: relative;
  overflow: hidden;
}

.birthday-message {
  font-size: 3em;
  color: #222;
  text-shadow: 0 0 10px gold, 0 0 20px orange;
}

.sparkles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.sparkle {
  position: absolute;
  width: 5px;
  height: 5px;
  background: radial-gradient(circle, gold 0%, transparent 70%);
  border-radius: 50%;
  opacity: 0;
  animation: sparkle-animation linear infinite;
}

@keyframes sparkle-animation {
  0% { transform: translate(var(--x-start), var(--y-start)) scale(0); opacity: 1; }
  50% { transform: translate(var(--x-mid), var(--y-mid)) scale(1); opacity: 0.7; }
  100% { transform: translate(var(--x-end), var(--y-end)) scale(0); opacity: 0; }
}

@media (max-width: 600px) {
  .birthday-message, .landing-slide h1 {
    font-size: 2em;
  }
}