/* 전체 페이지 스타일 */
body {
  margin: 0;
  font-family: sans-serif;
  background: #f0f0f0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0;
}

/* 오디오 컨트롤 영역 (게임 화면 위쪽에 위치) */
#audio-controls {
  margin-bottom: 20px;
  text-align: center;
  font-size: 14px;
  display: flex;
  flex-direction: row;
  gap: 30px;
  justify-content: center;
}

.audio-group {
  display: inline-flex;
  align-items: center;
  margin: 0 20px;
}

.audio-group button {
  margin-left: 8px;
  font-size: 16px;
  cursor: pointer;
}

/* 게임 영역 */
#game-wrapper {
  width: 1000px;
  height: 600px;
  border: 2px solid #444;
  background: #fff;
  position: relative;
  overflow: hidden;
}

/* 게임 내부 컨테이너 */
#game-container {
  width: 100%;
  height: 100%;
  position: relative;
}

/* 점수 */
#score {
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 20px;
  z-index: 5;
}

/* 타이머 바 */
#timer-bar {
  position: absolute;
  top: 0;
  right: 0;
  width: 5px;
  height: 100%;
  background-color: #ddd;
  z-index: 5;
}

#timer-progress {
  width: 100%;
  height: 100%;
  background-color: #00c853;
  transition: height 1s linear;
}

/* 원이 생성되는 영역 */
#game-area {
  position: absolute;
  top: 0;
  left: 0;
  width: calc(100% - 10px);
  height: 100%;
  z-index: 1;
}

/* 원 스타일 */
.circle {
  position: absolute;
  border-radius: 50%;
  background-color: red;
  cursor: pointer;
  animation: pop-in 0.2s ease-out;
}

/* 원 등장 애니메이션 */
@keyframes pop-in {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* 원 터짐 애니메이션 */
@keyframes explode {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

.circle.explode {
  animation: explode 0.3s forwards;
}

/* 시작 화면 */
#start-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7); /* 반투명 배경 */
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 50;
}

#start-screen .overlay {
  text-align: center;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
}

/* 종료 화면 */
#end-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7); /* 반투명 배경 */
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 50;
}

#end-screen .overlay {
  text-align: center;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
}

#end-screen h2,
#end-screen p,
#end-screen button {
  margin: 10px 0;
}

#start-button,
#restart-button {
  font-size: 18px;
  padding: 5px 15px 5px 15px;
  border-radius: 10px;
  border: none;
}

@media (prefers-color-scheme: dark) {
  body {
    background: #121212;
    color: #eee;
  }

  #game-wrapper {
    background: #1e1e1e;
    border-color: #888;
  }

  .circle {
    background-color: #ff5252;
  }

  #start-screen .overlay,
  #end-screen .overlay {
    background: #2c2c2c;
    color: #eee;
  }

  #score,
  #audio-controls label {
    color: #eee;
  }
}

.floating-text {
  position: absolute;
  font-size: 18px;
  font-weight: bold;
  color: #ff4081;
  animation: float-up 0.6s ease-out forwards;
  pointer-events: none;
  z-index: 10;
}

@keyframes float-up {
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateY(-30px);
  }
}

#timer-progress.low-time {
  background-color: #e53935 !important; /* 빨간색 */
}