body {
  margin: 0;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background-color: black;
  color: white;
  text-align: center;
  overflow: hidden;
}

#scene {
  background-size: cover;
  background-position: center;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding: 2em;
  box-sizing: border-box;
  transition: background-image 1s ease-in-out;
}

#text-container {
  background-color: rgba(0,0,0,0.6);
  padding: 1.5em;
  border-radius: 10px;
  line-height: 1.6em;
  margin-bottom: 2em;
  max-width: 800px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

#text {
    opacity: 1;
    transition: opacity 0.5s ease-in-out;
}

#text.fade-out {
    opacity: 0;
}

#buttons-container {
    margin-bottom: 2em;
}

button {
  margin: 0.5em;
  padding: 1em 2em;
  font-size: 1.1em;
  background-color: rgba(0, 80, 150, 0.4);
  color: white;
  border: 1px solid #66aaff;
  cursor: pointer;
  border-radius: 5px;
  transition: background-color 0.3s, transform 0.2s;
}

button:hover {
    background-color: rgba(0, 120, 220, 0.6);
    transform: translateY(-2px);
}


footer {
  font-size: 0.8em;
  color: #ccc;
  position: absolute;
  bottom: 10px;
  width: 100%;
  text-align: center;
}