style.css

#cards {
    display: flex;
    flex-wrap: wrap;
    width: 85%;
    margin: 0 auto;
}

.card {
    box-sizing: border-box;
    flex: 7% 1 1;
    height: 8vw;
    border: 2px solid #e0e0e0;
    margin: 2px;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
}

.card img {
    max-width: 30%;
    align-self: center;
}

.card p {
    margin: 3px;
    font-size: 10px;
}

.card p:last-child {
    transform: rotate(180deg);
}

.back {
    background: url("https://assets-lighthouse.alphacamp.co/uploads/image/file/9222/ExportedContentImage_00.png");
    background-size: cover;
}

.paired {
    background-color: #dae0e3;
}

#header {
    display: flex;
    margin: 0 auto;
    flex-direction: column;
    align-items: flex-end;
    width: 85%;
}

#header .title {
    width: 100%;
    display: flex;
    justify-content: flex-end;
}

#header .title img {
    max-width: 3em;
}

#header .title h2 {
    padding-left: 0.5em;
}

#header .score {
    margin: 0;
    color: #6c90ac;
}

#header .tried {
    margin-top: 0;
}

.wrong {
    animation-name: wrongAnimation;
    animation-duration: 0.2s;
    animation-iteration-count: 5;
}

@keyframes wrongAnimation {
    to {
        border: 2px solid #ffd54f;
    }
}


/** Game finished **/

.completed {
    position: absolute;
    z-index: 999;
    top: 33vh;
    background-color: RGBA(232, 246, 254, 0.8);
    width: 100vw;
    padding: 50px 0;
}

.completed>p {
    font-size: 1.5em;
    color: black;
    text-align: center;
    margin: 10px;
}

.a {
    font-size: 2em;
    text-align: center;
    margin: auto;
}

a {
    text-decoration: none;
    color: #758d9a;
}

.completed>p:first-child {
    font-size: 3em;
    font-weight: 700;
    color: #758d9a;
}