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

.text-center {
  text-align: center;
}

html {
  background-color: rgb(5, 51, 255);
  font-family: Arial, Helvetica, sans-serif;
  height: 100vh;
}

body > * {
  margin-block-end: 2rem;
  
}

h1 {
    border-block-end: 2px solid black;
    padding-block: 0.5rem
}

.container-btn {
  font-size: 14px;
}

.container-btn > * {
  padding: 0.5rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  border-radius: 0.5rem;
  margin-inline: 1rem;
  border: 2px solid black;
  font-weight: 900;
}

.container-btn > *:hover {
  opacity: 0.8;
}

.assignNumberOfSquareBtn {
    background-color: rgb(255, 238, 0);
}

.resetBtn {
    background-color: rgb(255, 0, 0);
}

.container {
  background-color: rgb(255, 255, 255);
  width: 360px;
  height: 360px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  border: 2px solid black;
  border-radius: 1rem;
  overflow: hidden;
}

.row {
  flex: 1;
  display: flex;
}

.square {
  width: 100%;
}

.square:hover {
  background-color: rgb(245, 245, 220);
}