/* General Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
    font-family: arial, sans-serif;
    background-color: #b0761f62;
    color: #333;
    line-height: 1.6;
    align-items: center;
    padding: 10px;
  }
  .section {
    display: none;
    margin-top: 20px;
    width: 100%;
    padding: 20px;
    margin-top: 10px;  
  }

  .section.active {
    display: block;
  }
  .button-container {
    display: flex;
    justify-content: center;  /* 水平居中 */
    gap: 10px;                 /* 按钮之间的间距 */
    margin: 20px 0;            /* 上下间距 */
  }
  
  .button-container button {
    background-color: #482e0b;
    color: #fff;
    border: none;
    border-radius: 5px;
    padding: 10px 15px;
    cursor: pointer;
    margin: 5px;
    font-size: 1rem;
  }
  
  .intro-section {
    background-color: #f8f5f0;  /* 淡米色背景，可换主题色 */
    padding: 30px 20px;         /* 上下左右留白 */
    margin: 30px 0;             /* 与其他内容拉开间距 */
  }
  
  .intro-section p {
    font-size: 1.2rem;          /* 比正文大一点 */
    line-height: 1.8;           /* 更舒适的行距 */
    max-width: 900px;           /* 限制文字行宽 */
    margin: 0 auto;             /* 水平居中 */
  }
  

  
  #map1, #map2, #map3{
    width: min(1100px, 90vw);
    height: 80vh;
    margin: 10px auto 0;
    border-radius: 24px;
    overflow: hidden;           /* 圆角裁切瓦片 */
    box-shadow: 0 8px 24px rgba(0,0,0,.12);
  }
  .leaflet-container{ background:#9ed6f0; } /* 海色底，避免露灰 */

  /* Select and Button in Section 2 */
#year-select {
  font-size: 1rem;
  padding: 5px;
  margin-top: 10px;
  margin-bottom: 20px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

/* Button in Section 3 */
#toggle-labeling {
  background-color: #b07613;
  color: white;
  border: none;
  border-radius: 5px;
  padding: 10px 15px;
  font-size: 1rem;
  cursor: pointer;
}