.color-picker {
  display: flex;
  gap: 10px;
}

.color-btn {
  width: 25px;
  height: 25px;
  border-radius: 50%;
  border: 3px solid rgba(0, 0, 0, 0.1);
  cursor: pointer;
  position: relative;
  transition: box-shadow 0.3s ease;
}

.color-btn-black {
  background-color: rgba(0, 0, 0, 0.4);
}

.color-btn-red {
  background-color: rgba(255, 0, 0, 0.4);
}

.color-btn-blue {
  background-color: rgba(0, 0, 255, 0.4);
}

.color-btn-green {
  background-color: rgba(0, 128, 0, 0.4);
}

.color-btn-yellow {
  background-color: rgba(255, 255, 0, 0.4);
}

.color-btn.active {
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.8);
}

.color-btn.active::after {
  content: "✔";
  color: white;
  font-size: 10px;
  font-weight: bold;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.color-btn-yellow.color-btn.active::after {
  color: black;
}

/* 스위치 컨테이너 */
.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 25px;
}

/* 체크박스 숨기기 */
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

/* 슬라이더 스타일 */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: 0.4s;
  border-radius: 25px;
}

/* 슬라이더 내부 원 */
.slider::before {
  content: "";
  position: absolute;
  height: 18px;
  width: 18px;
  left: 4px;
  bottom: 3.5px;
  background-color: white;
  transition: 0.4s;
  border-radius: 50%;
}

/* 체크되었을 때 스타일 */
input:checked + .slider.slider-drawing {
  background-color: #4CAF50;
}

input:checked + .slider.slider-line {
  background-color: #143acc;
}

input:checked + .slider.slider-eraser {
  background-color: #b01e1e;
}

input:checked + .slider.slider-highlighter {
  background-color: #f3f308;
}

input:checked + .slider::before {
  transform: translateX(25px);
}

/* 필기 상태 표시 */
.drawing-btn.enabled {
  color: #4CAF50;
}

.line-btn.enabled {
  color: #143acc;
}

.eraser-btn.enabled {
  color: #b01e1e;
}

.highlighter-btn.enabled {
  color: #f4ff81;
}