@font-face {
  font-family: 'Pretendard-Regular';
  src: url('https://fastly.jsdelivr.net/gh/Project-Noonnu/noonfonts_2107@1.1/Pretendard-Regular.woff') format('woff');
}

body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Pretendard-Regular', sans-serif;
  background: radial-gradient(circle at center, #1a2b5c, #07043C 80%);
}

#start-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  position: relative;
  z-index: 1;
}

.content {
  text-align: center;
  animation: fadeIn 2s ease-in-out;
}

h1 {
  font-size: 80px;
  color: white;
  margin-bottom: 10px;
  text-shadow: 0px 0px 15px rgba(255, 255, 255, 0.8), 
               0px 0px 30px rgba(255, 255, 255, 0.5);
}

.subtitle {
  color: white;
  font-size: 20px;
  margin-bottom: 100px;
  opacity: 0.4;

}

button {
  padding: 15px 30px;
  font-size: 18px;
  border: none;
  border-radius: 30px;
  cursor: pointer;
  background: linear-gradient(45deg, #4caf50, #81c784);
  color: white;
  transition: all 0.4s ease-in-out;
  box-shadow: 0px 0px 15px rgba(76, 175, 80, 0.8);
}

button:hover {
  background: linear-gradient(45deg, #81c784, #4caf50);
  box-shadow: 0px 0px 30px rgba(76, 175, 80, 1);
  transform: scale(1.1);
}

#viewer-screen, #final-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  position: relative;
}

#bigbang-message, #loading-message {
  position: absolute;
  text-align: center;
  color: white;
}

#bigbang-message {
  top: 40%;
  font-size: 24px;
  opacity: 0.9;
  animation: fadeIn 2s ease-in-out infinite alternate;
}

#loading-message {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: white;
}

.hidden {
  display: none;
}

.buffer-container {
  margin-top: 10px;
}

#buffer-value {
  font-size: 24px;
  font-weight: bold;
  color: white;
  text-align: center;
}

.white-text {
  color: white; /* 글자를 하얗게 설정 */
}

#particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}


#final-screen {
  display: flex;
  flex-direction: column;
  justify-content: flex-end; /* 하단 정렬 */
  align-items: center; /* 중앙 정렬 */
  width: 100%;
  height: 100%;
}

#spline-container {
  width: 100%;
  height: 100%;
}

#capture-container {
  display: flex;
  flex-direction: column; /* 버튼을 수직 정렬 */
  align-items: center; /* 버튼 중앙 정렬 */
  margin-bottom: 30px; /* 하단 여백 */
}

#capture-button, #screenshot-button {
  padding: 10px 20px;
  margin-top: 10px; /* 버튼 간격 조정 */
  font-size: 18px;
  border: none;
  border-radius: 30px;
  cursor: pointer;
  background: linear-gradient(45deg, #4caf50, #81c784);
  color: white;
  transition: all 0.4s ease-in-out;
}

#capture-button:hover, #screenshot-button:hover {
  background: linear-gradient(45deg, #81c784, #4caf50);
  transform: scale(1.05);
}