* {
    box-sizing: border-box;
}

body {
    margin: 0;
}

.container {
    height: 100vh;
    background-color: #7e7e7e;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

.cards {
    position: relative;
    width: 500px;
    height: 550px;
    border: 15px solid #000000;
    border-radius: 7px;
    background-color: #D0C9C0;
    box-shadow: 0 0 35px 5px #35353551;
    transform: rotateY(0);
    transition: transform 1s;
    transform-style: preserve-3d;
}

.cards:hover {
    transform: rotateY(180deg);
    transition: transform 1.5s;
    cursor: pointer;
}

.cards:hover .card {
    filter: contrast(130%);
}

.card {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    transition: filter .7s;
}

.front--card {
    background: url('kart_vizit_on.webp') no-repeat center/cover;
}

.back--card {
    transform: rotateY(180deg);
    background: url('kart_vizit_arka.webp') no-repeat center/cover;
}

/* Mobil cihazlar için duyarlı düzen */
@media (max-width: 768px) {
    .cards {
        width: 90vw; /* Ekran genişliğine göre ölçeklenir */
        height: auto;
        aspect-ratio: 10 / 11; /* Görsel oranını korur */
        border-width: 8px;
    }

    .card {
        background-size: contain; /* Görselin tamamı görünür, taşma olmaz */
        background-position: center;
    }

    .container {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .cards {
        width: 95vw;
        border-width: 5px;
    }
}