html {
  color: red;
}
body {
  background: #000;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-wrap: nowrap;
  width: 100vw;
  height: 100vh;
}
p {
  color: red;
}
h1 {
  font-size: 60px;
  text-wrap: nowrap;
  padding: 0 2rem 0 2rem;
}

input {
  margin: 5px;
  width: 20px;
  height: 20px;
  border-radius: 0;
}
#checkboxgrid {
  display: grid;
  grid-template-columns: repeat(10,0fr);
  background: red;
  padding: 0;
}