/* ============================================
 * Konami Code 彩蛋样式
 * 触发条件：↑ ↑ ↓ ↓ ← → ← → B A
 * ============================================ */

/* --- 樱花 Canvas 覆盖层 --- */
#konami-sakura-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 99999;
  pointer-events: none; /* 不阻挡用户点击 */
  opacity: 0;
  animation: konami-fade-in 0.6s ease-out forwards;
}

/* --- 主题色彩虹旋转（添加到 html 元素） --- */
html.konami-active {
  animation: konami-hue 3s linear infinite;
}

@keyframes konami-hue {
  0%   { filter: hue-rotate(0deg); }
  100% { filter: hue-rotate(360deg); }
}

/* --- 弹窗卡片 --- */
#konami-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.7);
  z-index: 100000;
  padding: 36px 48px;
  max-width: 420px;
  text-align: center;

  /* 毛玻璃 */
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 20px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12),
              0 0 0 1px rgba(255, 255, 255, 0.1) inset;

  /* 动画 */
  opacity: 0;
  animation: konami-popup-in 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s forwards;
}

[data-theme="dark"] #konami-popup {
  background: rgba(40, 40, 40, 0.45);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35),
              0 0 0 1px rgba(255, 255, 255, 0.06) inset;
}

#konami-popup .konami-emoji {
  font-size: 48px;
  line-height: 1;
  margin-bottom: 16px;
  display: block;
  animation: konami-bounce 1s ease infinite;
}

#konami-popup .konami-text {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.6;
  color: #333;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
}

[data-theme="dark"] #konami-popup .konami-text {
  color: #eee;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

#konami-popup .konami-hint {
  margin-top: 16px;
  font-size: 12px;
  color: #999;
}

/* --- 动画关键帧 --- */
@keyframes konami-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes konami-popup-in {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.7);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

@keyframes konami-bounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

/* --- 淡出（JS 添加此 class 后触发） --- */
#konami-sakura-canvas.konami-fade-out,
#konami-popup.konami-fade-out {
  animation: konami-fade-out-kf 0.8s ease forwards;
}

@keyframes konami-fade-out-kf {
  from { opacity: 1; }
  to   { opacity: 0; }
}