style.css

.grid {
  display: grid;
  grid-template-columns: repeat(24, 4%);
  grid-template-rows: repeat(12, 8%);
  width: 100%;
  height: 100%;
  min-width: 1200px;
  column-gap: 0;
  row-gap: 0;
  margin-left: 2rem;
}

.restart {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  background: black;
  transition: opacity 2s ease-out;
}

.restart_button {
  background: rgb(58, 131, 247);
  display: flex;
  box-sizing: content-box;
  border-radius: 10px;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  color: white;
  cursor: pointer;
  width: 200px;
  height: 4%;
}

.restart[type="restart"] {
  opacity: 80%;
}

.cell {
  display: flex;
  font-size: 2px;
  background: url("./thumbnail/lawn.jpeg");
  background-size: 80px 80px;
  width: 100;
  height: 100;
  border: 1px solid rgb(19, 42, 19);
  top: 50%;
  left: 50%;
  align-items: center;
  justify-content: center;
  transition: all 0.5s linear;
}

html,
body {
  width: 100%;
  height: 100%;
  min-width: 1200px;
  background: url("./thumbnail/lawn.jpeg");
  transition: all 0.5s linear;
  overflow: hidden;
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.blue_patch {
  width: 100%;
  height: 100%;
  background-color: blue;
  opacity: 50%;
}

.status {
  font-size: 2em;
  color: white;
  background-color: black;
  font-family: "Helvetica";
}

.center {
  margin: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: fit-content;
  font-family: "Helvetica";
}