body {
  background-image: url("./1.jpg");
  background-size: cover;
}

div {
  display: inline;
}

#sel {
    margin-left: 44px;
    margin-top: 69px;
    display: block;
    float: left;
    position: absolute;
}
.columnDiv {
  /* 单元行 */
  display: table-row;
}
.rowDiv {
  /* 单元格 */
  display: table-cell;
  white-space: pre;
}
#mainPanel {
  text-align: center;
  margin: 50px auto;
  display: table;
}
.block {
  /* 初始方块样式 */
  display: inline-block;
  width: 40px;
  height: 40px;
  margin: 0.75px;
  line-height: 40px;
  color: wheat;
  font-size: 1rem;
  background-color: rgb(0, 0, 0);
  border-radius:3px;
}
.blockClicked {
  /* 点击后 */
  color: bisque;
  background-color: rgb(212, 176, 13);
}

button {
  width: 60px;
  height: 40px;
  border-radius: 10px;
  border: 3px outset;
  background-color: #101318;
  color: #ff8e19;
  margin-left: 30px;
}
select {
  border-radius: 8px;
  height: 30px;
  border-width: 3px;
  border-style: dotted;
  color: cornflowerblue;
  font-weight: bold;
}
#score_panel {

  background-color: antiquewhite;
  padding: 10px;
  float: right;
  position: fixed;
  top: 5%;
  right: 100px;
}