body {
    font-family: Arial, sans-serif;
    background-color: #b7b7b7;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0;
}

.container {
    text-align: center;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(5, 100px); /* 4 yerine 5 sütun yapıldı */
    gap: 10px;
    margin-top: 20px;
    justify-content: start; /* Kartları sola yasla */
    display: flex;
        flex-wrap: wrap;
        width: 90%;
        margin: 20px auto;
        justify-content: center;
}

.card {
    width: 100px;
    height: 100px;
    background-color: #fff;
    border: 1px solid #ccc;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 18px; /* Font boyutunu biraz küçülttüm */
    color: #fff;
    position: relative;
    perspective: 1000px;
}

.card-inner {
    position: absolute;
    width: 100%;
    height: 100%;
    transition: transform 0.5s; 
    transform-style: preserve-3d;
}

.card.flipped .card-inner {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 5px;
    padding: 5px; /* İçerik için biraz padding ekledim */
    box-sizing: border-box; /* Padding eklenince boyutlar düzgün olsun diye */
}

.card-front {
    background-color: #007bff;
    color: white;
}

.card-back {
    background-color: #fff;
    color: #250000;
    transform: rotateY(180deg);
}

.card.matched {
    background-color: green !important;
    color: white;
}

.card.unmatched {
    background-color: red !important;
    color: white;
}

.start-btn {
    padding: 10px 20px;
}

.score {
    margin-top: 20px;
    font-size: 18px;
}

.score-value {
    font-weight: bold;
}

.level {
    margin-top: 40px;
}

.level .row {
    margin-bottom: 40px; /* Çift seviyeler arasında mesafe */
}

#start-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#levels{
    background-color: #d3d3d3;
}