body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  font-family: "Arial", sans-serif;
  background-color: #fff0f5;
  color: #ff69b4;
}

.card {
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  padding: 20px;
}

#setup {
  text-align: center;
  padding: 30px; /* 增加内边距 */
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px; /* 添加元素之间的间距 */
}

#setup h2 {
  margin-bottom: 20px; /* 标题下方增加间距 */
}

#setup input[type="number"] {
  width: 80%; /* 控制输入框宽度 */
  max-width: 300px; /* 限制最大宽度 */
  margin-bottom: 15px; /* 输入框下方增加间距 */
}

#setup .btn {
  margin-top: 10px; /* 按钮上方增加间距 */
  width: 80%; /* 控制按钮宽度 */
  max-width: 300px; /* 限制最大宽度 */
}

#drawingApp {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  overflow: auto; /* 添加滚动条 */
  max-height: 80vh; /* 限制最大高度 */
  max-width: 80vw; /* 限制最大宽度 */
}

.toolbox {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#pixelCanvas {
  border: 2px solid #ff69b4;
  border-radius: 5px;
  transition: transform 0.3s ease; /* 添加平滑过渡效果 */
}

input[type="number"],
input[type="color"],
input[type="range"] {
  width: 100%;
  padding: 5px;
  border: 1px solid #ff69b4;
  border-radius: 5px;
}

.btn {
  background-color: #ff69b4;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.btn:hover {
  background-color: #ff1493;
}

label {
  font-weight: bold;
}

#brushSizeValue {
  text-align: center;
}

/* 添加更多样式以美化界面 */

.shortcut-hint {
  font-size: 0.8em;
  color: #888;
  margin: 5px 0;
}

/* ... 保持其他样式不变 ... */

select {
  width: 100%;
  padding: 5px;
  border: 1px solid #ff69b4;
  border-radius: 5px;
  background-color: white;
  color: #ff69b4;
}

/* 添加背景主题相关样式 */
.theme-white {
  background-color: white;
}

.theme-dark {
  background-color: #333;
}

.theme-black {
  background-color: black;
}

.theme-transparent {
  background-color: transparent;
  background-image: linear-gradient(45deg, #ccc 25%, transparent 25%),
    linear-gradient(-45deg, #ccc 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ccc 75%),
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

#eraserButton.active {
  background-color: #ff1493;
}

#opacityValue {
  text-align: center;
}