body {
  margin: 0;
  font-family: Arial, sans-serif;
  overflow: hidden;

  background: linear-gradient(135deg, #fef9ff, #eef7ff);

  height: 100vh;
}

.container {
  text-align: center;
  padding-top: 100px;
  position: relative;
  z-index: 5;
}

h1 {
  font-size: 3rem;
}

.subtitle {
  font-size: 1.2rem;
}

input {
  padding: 12px;
  font-size: 18px;
  width: 220px;
  border-radius: 10px;
  border: 1px solid #ccc;
}

button {
  padding: 12px 20px;
  font-size: 18px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  margin-left: 10px;
}

button:hover {
  transform: scale(1.05);
}

.hidden {
  display: none;
}

#error {
  margin-top: 15px;
  color: red;
}

#genderText {
  font-size: 5rem;
  animation: pulse 1.5s infinite;
}

#genderEmoji {
  font-size: 8rem;
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.12);
  }
  100% {
    transform: scale(1);
  }
}

.balloon {
  position: absolute;
  bottom: -150px;
  font-size: 60px;

  animation-name: floatUp;
  animation-timing-function: linear;
  animation-fill-mode: forwards;
}

@keyframes floatUp {
  from {
    transform: translateY(0);
  }

  to {
    transform: translateY(-120vh);
  }
}