/* 基础样式重置和全局设置 */
* {
  margin: 0;
  padding: 0;
}

body {
  background-color: #f1f2f3;
}

.container {
  box-sizing: border-box;
  width: 100%;
  max-width: 1560px;
  min-width: 1240px;
  margin: 25px auto;
  color: #333;
}

.container *{
  box-sizing: border-box;
}

header {
  text-align: center;
  margin-bottom: 25px;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: 5px;
}

header  p{
  font-size: 1rem;
  opacity: 0.9;
  margin: 0 auto;
}

.box {
  display: flex;
  gap: 20px;

  margin-bottom: 25px;
}

.box .handle,
.box .panel {
  width: 320px;
  padding: 20px;
  background: #fff;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 25px;
}

.inputbox {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.checkbox {
  flex-direction: row;
}

.checkbox label {
  padding-left: 10px;
  font-size: 16px;
}

.checkbox input {
  width: 24px;
  height: 24px;
}

.label {
  font-weight: bold;
  color: #555;
  font-size: 15px;
  margin-bottom: 10px;
}

.button {
  width: 100%;
  background: #1976d2;
  color: white;
  border: none;
  padding: 12px 20px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 15px;
  transition: all 0.3s;
}

.button:hover {
  background: #1565c0;
  transform: translateY(-2px);
  box-shadow: 0 3px 8px rgba(25, 118, 210, 0.3);
}

select {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
  background: #fff;
  font-size: 14px;
}


#message_area {
  text-align: center;
  font-size: 15px;
  font-weight: bold;
  color: #d32f2f;
}

/* 棋盘区域 */
.panel {
  width: auto;
  flex: 1;
}

#rootbox {
  background: #e0cc9c;
  border: 2px solid #8B4513;
  border-radius: 4px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 控制面板 */
.control-panel {
  display: flex;
  gap: 30px;
  background: #fff;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
  margin-bottom: 30px;
}

.control-column {
  flex: 1;
}

#selMoveList {
  width: 100%;
  max-width: 100%;
  min-height: 162px;
}

.checkbox-container {
  display: flex;
  align-items: center;
  gap: 8px;
}



/* 底部信息区域 */
.footer {
  background: #fff;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.footer h2 {
  color: #1976d2;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid #eee;
}

.features {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 25px;
}

.feature-item {
  flex: 1;
  min-width: 300px;
  padding: 15px;
  background: #f9f9f9;
  border-radius: 8px;
  border-left: 4px solid #1976d2;
}

.feature-item h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  color: #333;
}

.introduction {
  line-height: 1.8;
  color: #555;
}

.introduction p {
  margin-top: 15px;
}