/* brush-line 结构使用 inline-block 支持一行并列 */
.brush-line {
  display: inline-block;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  line-height: 1;
  font-size: clamp(2rem, 9vw, 6rem);
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
}

#brush-line1, #brush-line2 {
  top: 50%; /* 上移一点 */
}

#brush-line3 {
  top: 50%; /* BRUSH YOUR TEETH 居中 */
}


/*mouth section*/
#mouth-section {
  height: 100vh;
  width: 100vw;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: none; /* 隐藏默认 cursor */
  position: relative;
}

.mouth-wrapper {
  position: relative;
  width: 60vw;
  height: auto;
}

#ouch-indicator {
  position: absolute;
  top: 0;
  left: 0;
  width: 25vw;
  transform: translate(-12vw, -8vw);
  pointer-events: none;
  display: none;
  z-index: 10000;
}

#toothbrush-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 30vw;
  height: auto;
  pointer-events: none;
  display: none;
  z-index: 9999;
}

.mouth-wrapper.shake {
  animation: shake 0.3s ease-in-out;
}

@keyframes shake {
  0%   { transform: translate(0, 0); }
  25%  { transform: translate(-0.5rem, 0.5rem); }
  50%  { transform: translate(0.5rem, -0.5rem); }
  75%  { transform: translate(-0.5rem, 0.5rem); }
  100% { transform: translate(0, 0); }
}