index.css

* {
  margin: 0;
  padding: 0;
}

#header {
  background-color: lightpink;
  height: 30vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#container {
  background-color: black;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-evenly;
  align-items: center;
}

.tile {
  box-sizing: border-box;
  height: 15vw;
  width: 15vw;
  background-color: aliceblue;
  margin: 3rem 5rem;
  border-radius: 0.4rem;
  text-align: center;
  font-size: 3vh;
  font-weight: 800;
  line-height: 3vh;
  padding-top: 9vh;
}

.tile:hover{
  transform: scale(1.02) translateY(-2px);
    box-shadow: 3px 3px 6px #ffffff;
    cursor: pointer;
}

.score-panel{
  position: absolute;
  top: 20px;
  right: 20px;
  background-color: white;
  border-radius: 0.4rem;
  height: 20vh;
  padding: 10px;
  display: flex;
  flex-direction: column;
}

.panel{
  text-align: center;
  font-size: 22px;
}

#next{
  width: 13rem;
    padding: 0.7rem;
    font-size: 1.2rem;
    color: white;
    background: #3F51B5;
    border: 0;
    outline: 0;
    border-radius: 0.4rem;
    cursor: pointer;
    transition: 0.4s;
    margin: 5px;
}
#reset{
  width: 13rem;
    padding: 0.7rem;
    font-size: 1.2rem;
    color: white;
    background: #3F51B5;
    border: 0;
    outline: 0;
    border-radius: 0.4rem;
    cursor: pointer;
    transition: 0.4s;
    margin: 5px;
}