*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", sans-serif;
  line-height: 1.5;
  color: #2a2a2a;
}

button,
label {
  cursor: pointer;
}

input {
  font: inherit;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

table {
  border-collapse: collapse;
}

th,
td {
  border: 1px solid black;
  padding: 10px 15px;
}

.item {
  width: 50px;
  height: 50px;
  border: 1px solid black;
  outline: auto;
  text-align: center;
  vertical-align: middle;
  line-height: 50px;
}

.container {
  display: flex;
  gap: 20px;
  font-size: 2rem;
}

.result {
  font-size: 1.5rem;
  margin-top: 20px;
}

.modal {
  width: 300px;
  height: 300px;
  background-color: aliceblue;
  display: flex;
  align-items: center;
  justify-content: center;
}