style.css

* {
    color: #ffffff;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif

}

body{
    background-color: #121213;
}

.gameContainer{
    height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

.titleContainer{
    text-align: center;
    width: 510px;
    border-bottom: solid 1px #3a3a3c;
}

.tileContainer{
    width: 330px;
    margin-bottom: 30px;
}

.keyContainer{
    width: 510px;
    display: flex;
    flex-wrap: wrap;
}

.keyContainer button {
    width: 43px;
    height: 58px;
    border-radius: 4px;
    border: none;
    background-color: #818384;
    margin: 4px;
}

.keyContainer button:nth-child(11) {
    margin-left: 30px;
}

.keyContainer button:nth-child(20),
.keyContainer button:nth-child(28) {
    width: 68px;

}

.tileContainer div {
    display: flex;
}

.tileContainer .tile {
    width: 62px;
    height: 62px;
    border: 2px solid #3a3a3c;
    box-sizing: border-box;
    justify-content: center;
    align-items: center;
    margin: 2px;
}

.messageContianer {
    height: 30px;
}

.messageContianer p {
    background-color: #818384;
    border-radius: 10px;
    padding: 10px;
    margin: 0;
}

.tile.flip  {
    animation: 0.5s linear flipping;
}

@keyframes flipping {
    0% {
        transform: rotateX(0deg);
    }
    50% {
        transform: rotateX(90deg);
    }
    100% {
        transform: rotateX(0deg);
    }
}

/* important so that backgrounf color should be overwritten */
/* order is also important  gray -> yellow -> green */
.grayOverlay {
    background-color: #3a3a3c !important;
    border: none !important;
}

.yellowOverlay {
    background-color: #b59f3a !important;
    border: none !important;
}

.greenOverlay {
    background-color: #538d4e !important;
    border: none !important;
}