body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: #212529;
}

p,
h1 {
  color: white;
}

header {
  width: 100%;
}
header h1 {
  font-size: 2rem;
  text-align: center;
}

main {
  display: flex;
  justify-content: center;
}
main .grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
main .grid div:nth-child(1) > .element:nth-child(1) {
  border-top: none;
  border-left: none;
}
main .grid div:nth-child(1) > .element:nth-child(2) {
  border-left: none;
}
main .grid div:nth-child(1) > .element:nth-child(3) {
  border-bottom: none;
  border-left: none;
}
main .grid div:nth-child(2) > .element:nth-child(1) {
  border-top: none;
}
main .grid div:nth-child(2) > .element:nth-child(3) {
  border-bottom: none;
}
main .grid div:nth-child(3) > .element:nth-child(1) {
  border-top: none;
  border-right: none;
}
main .grid div:nth-child(3) > .element:nth-child(2) {
  border-right: none;
}
main .grid div:nth-child(3) > .element:nth-child(3) {
  border-bottom: none;
  border-right: none;
}
main .element {
  display: flex;
  width: 150px;
  height: 150px;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
main .element p {
  font-size: 5rem;
}
main .element:nth-child(1) {
  border: 1px solid white;
}
main .element:nth-child(2) {
  border: 1px solid white;
}
main .element:nth-child(3) {
  border: 1px solid white;
}

footer {
  width: 100%;
}
footer p {
  text-align: center;
}
footer a {
  color: #00E0FF;
}

.cross {
  position: absolute;
  right: 32px;
  top: 32px;
  width: 32px;
  height: 32px;
  opacity: 0.3;
}

.cross:hover {
  opacity: 1;
}

.cross:before,
.cross:after {
  position: absolute;
  left: 15px;
  content: " ";
  height: 33px;
  width: 2px;
  background-color: white;
}

.cross:before {
  transform: rotate(45deg);
}

.cross:after {
  transform: rotate(-45deg);
}

@media (max-width: 414px) {
  .element {
    width: 100px !important;
    height: 100px !important;
  }
}