body {
  background-image: url('https://i.pinimg.com/originals/46/ca/19/46ca199f6acdaf6f85811db17e9ed2af.gif');
  background-size: auto;
  background-position: center;
  background-repeat: no-repeat;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0;
  overflow: hidden;
}

h1 {
  font-size: 48px;
  color: white;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  margin-bottom: 20px;
}

.button {
  padding: 10px 20px;
  font-size: 24px;
  margin: 10px;
  cursor: pointer;
}

#no {
  position: absolute;
  transition: top 0.3s, left 0.3s;
}

.firework {
  position: absolute;
  width: 50px;
  height: 50px;
  pointer-events: none;
  animation: firework 1s linear infinite;
}

@keyframes firework {
  0% {
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -100vh) rotate(360deg) scale(0);
    opacity: 0;
  }
}