body {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
}
main {
    flex-direction: column;
    flex-wrap: nowrap;
}
.player {
    flex-shrink: 0;
    margin-bottom: 0.5em;
    margin-top: 0.5em;
}
#board {
    margin-top: 2%;
    width: 100%;
    display: flex;
    flex-grow: 1;
    flex-shrink: 0;
}
#cards {
    flex-grow: 1;
    margin-right: 1em;
    background-image: url(../../pics/bg.png);
    padding: 1em;
    box-shadow: inset 0 0 1px rgba(0, 0, 0, 0.5);
}
#controls {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.card {
    margin: 5px;
    padding: 5px;
    font-size: 2em;
    text-align: center;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0px 0px 3px rgba(0, 0, 0, 0.5);
    min-height: 6vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.card p {
    margin: 0;
    padding: 0;
}
.card.error {
    background: repeating-linear-gradient(135deg, #ccc, #ccc 5px, #fff 3px, #fff 10px);
}
#appMenu {
    padding-top: 0.85em;
    background: #fff;
}
#appMenu img {
    width: 100%;
}
#appMenu,
#check {
    font-size: inherit;
    width: 4.3em;
    height: 4.3em;
    border-radius: 10px;
    margin: 2px;
}
#check img {
    width: 100%;
}
#exercises {
    font-size: 1.2em;
}
#exercises h1 {
    font-size: 2.5em;
    margin-left: 0;
}
.modal_window h2 {
    font-size: 2.5em;
}
#exercises .buttons {
    max-width: 800px;
}
#exercises button {
    width: 30%;
    max-width: 150px;
    margin-bottom: 6px;
}
.modal_window button {
    /*padding-left: 2em;
    padding-right: 2em;*/
}
@media only screen and (max-width: 600px) {
    #exercises h1,
    .modal_window h2 {
        font-size: 1.8em;
    }
}