:root {
    --boxCount: 3;
    --transitionTime: 1s;
    --btnOneColor: #223cde;
    --btnTwoColor: #0f7c0f;
    --btnThreeColor: #e50014;
}

body {
    display: block !important;
}
#app {
    display: flex;
}

.box {
    transition: flex var(--transitionTime) ease;
    height: 100vh;
    flex:1;
    
    width: calc(100% / var(--boxCount));
    background-repeat: no-repeat;
    background-size: cover;
    filter: opacity(1) grayscale(0.3);

    color: white;
    font-weight: bolder;
    font-size: 2em;

    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-direction: column;
}

.box .btn {
    background-color: white;
}

.box:nth-child(1) {
    background-image: url('./ps5.jpg');
}

.box:nth-child(1) .btn {
    border: 3px solid;
    padding: 15px;
    color: var(--btnOneColor);
}
.box:nth-child(1) .btn:hover {
    color: white;
    background-color: var(--btnOneColor);
    border-color: var(--btnOneColor);
}

.box:nth-child(2) {
    background-image: url('./xbox.jpg');
}

.box:nth-child(2) .btn {
    border: 3px solid;
    padding: 15px;
    color: var(--btnTwoColor);
}
.box:nth-child(2) .btn:hover {
    color: white;
    background-color: var(--btnTwoColor);
    border-color: var(--btnTwoColor);
}

.box:nth-child(3) {
    background-image: url('./NS.jpg');
}

.box:nth-child(3) .btn {
    border: 3px solid;
    padding: 15px;
    color: var(--btnThreeColor);
}
.box:nth-child(3) .btn:hover {
    color: white;
    background-color: var(--btnThreeColor);
    border-color: var(--btnThreeColor);
}

.box.active {
    flex: 5;
    filter: opacity(1) grayscale(0);
}