:root {
  --odd: #ef476f;
  --even: #f78c6b;
  --fizz: #ffd166;
  --buzz: #06d6a0;
  --fizzbuzz: #118ab2;
  --nonfizzbuzz: #a1c349;
  --text-colour: #f8edeb;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  --tw-bg-opacity: 1;
  background-color: hsl(223 30% 9% / var(--tw-bg-opacity));
}

.mapping {
  padding: 1rem 2rem;
  display: flex;
  flex-direction: column;
}

.mapping h2,
.colour__item h3 {
  color: var(--text-colour);
}

.colour__item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.box__item {
  width: 20px;
  height: 20px;
}

.even__box {
  background-color: var(--even);
}
.odd__box {
  background-color: var(--odd);
}
.fizz__box {
  background-color: var(--fizz);
}
.buzz__box {
  background-color: var(--buzz);
}
.fizzbuzz__box {
  background-color: var(--fizzbuzz);
}
.nonfizzbuzz__box {
  background-color: var(--nonfizzbuzz);
}
.grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(6rem, 1fr));
  grid-auto-rows: 1fr;
  gap: 1rem;
  padding: 1rem 2rem;
}
.grid::before {
  content: "";
  width: 0;
  padding-bottom: 100%;
  grid-row: 1/1;
  grid-column: 1/1;
}

.grid > *:first-child {
  grid-row: 1/1;
  grid-column: 1/1;
}
.grid__item {
  position: relative;
}
.grid__item::before {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 1;
  transform: translate(-50%, -50%);
  content: attr(data-index);
  display: block;
  padding: 0.6rem;
  border-radius: 50%;

  color: #999;
  background-color: #fff;
}

.even,
.odd,
.fizz,
.buzz,
.fizzbuzz,
.nonfizzbuzz {
  position: absolute;
  width: 100%;
  height: 100%;
  text-align: center;
  font-size: 2rem;
}

.even {
  background-color: var(--even);
  clip-path: polygon(0 0, 0% 100%, 100% 0);
}

.odd {
  background-color: var(--odd);
  clip-path: polygon(0 0, 0% 100%, 100% 0);
}

.fizz {
  background-color: var(--fizz);
  clip-path: polygon(100% 100%, 0% 100%, 100% 0);
}

.buzz {
  background-color: var(--buzz);
  clip-path: polygon(100% 100%, 0% 100%, 100% 0);
}

.fizzbuzz {
  background-color: var(--fizzbuzz);
  clip-path: polygon(100% 100%, 0% 100%, 100% 0);
}

.nonfizzbuzz {
  background-color: var(--nonfizzbuzz);
  clip-path: polygon(100% 100%, 0% 100%, 100% 0);
}