* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    font-size: 18px;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-image: url('Images/BackgroundDesktop.svg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    background-color: #88E864;
    min-height: 100dvh;
}

/* Memory */

:root {
    --card-color: #fff;
}

.board {
    height: 490px;
    width: 400px;
    padding: 25px;
    background: #f4f4f4;
    border-radius: 10px;
    display: flex;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    flex-direction: column;
}

.cards, .card, .view {
    display: flex;
    align-items: center;
    justify-content: center;
}

.cards {
    height: 100%;
    width: 100%;
    flex-wrap: wrap;
    justify-content: space-between;
}

.cards .card {
    cursor: pointer;
    position: relative;
    perspective: 800px;
    transform-style: preserve-3d;
    height: calc(100% / 4 - 10px);
    width: calc(100% / 4 - 10px);
}

.card.shake {
    animation: shake 0.35s ease-in-out;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    20% {
        transform: translateX(-13px);
    }
    40% {
        transform: translateX(13px);
    }
    60% {
        transform: translateX(-8px);
    }
    80% {
        transform: translateX(8px);
    }
}

.cards .card .view {
    width: 100%;
    height: 100%;
    user-select: none;
    pointer-events: none;
    position: absolute;
    background: var(--card-color);
    border-radius: 7px;
    backface-visibility: hidden;
    transition: transform 0.25s linear;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

/* Borders für openMode */
.card.selected .back-view { border: 3px solid #2196F3; }
.card.mismatch .back-view { border: 3px solid #E53935; }
.card.matched .back-view  { border: 3px solid #43A047; }

.card.selected .back-view,
.card.mismatch .back-view,
.card.matched .back-view {
    border-radius: 7px;
}

.card .front-view span {
    font-size: 40px;
}

.card .back-view {
    transform: rotateY(-180deg);
}

.card .back-view img {
    width: 80%;
    height: 80%;
    object-fit: contain;
    display: block;
}

/* In offenem Modus alles auf Karten schwarz färben */
.open-mode .card .back-view img {
    filter: brightness(0) saturate(100%);
}

.open-mode .front-view .material-icons {
    color: #000 !important;
}


.card.flip .front-view {
    transform: rotateY(180deg);
}

.card.flip .back-view {
    transform: rotateY(0);
}

.hidden img {
    visibility: hidden;
}

/* ------------------- */ 

.dock {
    width: 400px;
    height: 90px;
    background-color: #fff;
    border-radius: 10px;
    padding: 14px 16px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    row-gap: 8px;
    column-gap: 12px;
    width: 100%;
    margin-top: auto;
    margin-top: 20px;
    align-items: center;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

.dock > * {
    flex: 0 0 calc(50% - 12px);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.retry, .switch {
    border-radius: 5px;
    border: 2px solid black;
    padding: 2px 8px;
    cursor: pointer;
    background: #71f182;
    color: black;
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
    transition: transform 0.2s ease;
    white-space: nowrap;
}

@media (hover: hover) and (pointer: fine) {
    .retry:hover, .switch:hover {
        transform: scale(1.05);
    }
    
    .retry:active, .switch:active {
        transition: transform 0.1s ease;
        transform: scale(1.0);
    }
}

@media (orientation: portrait) and (max-width: 1024px) {
    body {
        background-image: none !important;
        background-color: white;
    }
}

@media (hover: none) and (pointer: coarse) {
    .retry, .switch {
        transition: transform 0.12s ease;
    }

    .retry:active, .switch:active {
        transform: scale(0.95);
    }

    .retry.pressed, .switch.pressed {
        transform: scale(0.95);
    }
}