* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #ffff00;
  --bg-dark: #1a1a1a;
  --bg-panel: rgba(0, 0, 0, 0.9);
  --text: #ffffff;
  --text-dim: #aaaaaa;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;
  background: var(--bg-dark);
  font-family: 'Noto Serif KR', serif;
  color: var(--text);
}

canvas {
  display: block;
}

/* ========== 정보 오버레이 ========== */
#info-overlay {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
}

#info-toggle {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  background: var(--bg-panel);
  color: var(--primary);
  font-size: 24px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(255, 255, 0, 0.3);
}

#info-toggle:hover {
  background: var(--primary);
  color: var(--bg-dark);
  transform: rotate(90deg);
}

#info-panel {
  position: absolute;
  top: 60px;
  right: 0;
  width: 320px;
  background: var(--bg-panel);
  border: 2px solid var(--primary);
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.8);
  opacity: 1;
  transform: translateY(0);
  transition: all 0.3s ease;
}

#info-panel.hidden {
  opacity: 0;
  transform: translateY(-20px);
  pointer-events: none;
}

#info-panel h1 {
  font-size: 24px;
  margin-bottom: 8px;
  color: var(--primary);
  font-weight: 700;
}

#info-panel p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dim);
  margin-bottom: 15px;
}

#info-panel hr {
  border: none;
  border-top: 1px solid rgba(255, 255, 0, 0.2);
  margin: 15px 0;
}

#info-panel ul {
  list-style: none;
  margin: 15px 0;
}

#info-panel li {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 8px;
}

#info-panel .tech {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.8;
}

/* 링크 버튼 */
.links {
  display: flex;
  gap: 10px;
  margin-top: 15px;
}

.links a {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 15px;
  background: rgba(255, 255, 0, 0.1);
  border: 1px solid var(--primary);
  border-radius: 6px;
  color: var(--primary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.links a:hover {
  background: var(--primary);
  color: var(--bg-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 255, 0, 0.4);
}

/* ========== 오디오 프롬프트 ========== */
#audio-prompt {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-panel);
  color: var(--primary);
  padding: 12px 24px;
  border-radius: 25px;
  border: 2px solid var(--primary);
  font-size: 14px;
  font-weight: 600;
  z-index: 999;
  animation: pulse 2s ease-in-out infinite;
  box-shadow: 0 4px 20px rgba(255, 255, 0, 0.3);
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.05); }
}

/* 오디오 활성화 후 숨기기 */
body.audio-active #audio-prompt {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

/* ========== 반응형 디자인 ========== */
@media (max-width: 768px) {
  #info-overlay {
    top: 15px;
    right: 15px;
  }

  #info-toggle {
    width: 44px;
    height: 44px;
    font-size: 20px;
  }

  #info-panel {
    width: calc(100vw - 30px);
    max-width: 320px;
    right: -5px;
  }

  #info-panel h1 {
    font-size: 20px;
  }

  #audio-prompt {
    font-size: 12px;
    padding: 10px 20px;
    bottom: 20px;
  }
}

@media (max-width: 480px) {
  #info-panel {
    padding: 20px;
  }

  #info-panel h1 {
    font-size: 18px;
  }

  #info-panel p,
  #info-panel li {
    font-size: 12px;
  }

  .links a {
    font-size: 11px;
    padding: 8px 12px;
  }
}

/* ========== 접근성 ========== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* 다크모드 지원 */
@media (prefers-color-scheme: light) {
  :root {
    --bg-dark: #f0f0f0;
    --bg-panel: rgba(255, 255, 255, 0.95);
    --text: #1a1a1a;
    --text-dim: #666666;
  }
}