style.css

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

.container {
  width: 100%;
  min-height: 100vh;
  background-color: rgb(226, 205, 209);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.small {
  left: 39%;
  top: 20%;
}

.mid {
  left: 33.5%;
  top: 16%;
}

.large {
  left: 30%;
  top: 14%;
}

.tromino_box {
  margin-top: 20px;
  width: 800px;
  height: 800px;
  background-color: #fff;
  display: flex;
  flex-wrap: wrap;
}

.input_require {
  width: 590px;
  height: 40px;
  line-height: 40px;
  background-color: #f8c6c6;
  color: #252323;
  border-radius: 2px;
  padding-left: 66px;
  opacity: 0.95;
  /* font-weight: bold; */
}

.input_require input {
  width: 40px;
  height: 15px;
  outline: none;
}

.input_require .tromino_size {
  margin-right: 20px;
}

.input_require .show_tromino {
  cursor: pointer;
  width: 76px;
  height: 30px;
  background-color: rgb(245, 151, 151);
  border: none;
  border-radius: 8px;
  position: relative;
  left: 40px;
  outline: none;
}