.chessboard {
    display: grid;
    grid-template-columns: repeat(8, 50px);
    grid-template-rows: repeat(8, 50px);
    gap: 2px;
}

.square {
    width: 100%;
    height: 100%;
}

.main-color {
    background-color: #ccc;
}

.alternate-color {
    background-color: #000f;
}

.selected-color-correct {
    background-color: #00ff00;
}

.selected-color-incorrect {
    background-color: #D2042D;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

.title {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
}

.coordinate {
    font-size: 20px;
    font-weight: bold;
    margin-top: 20px;
}

.header {
    padding: 20px;
}

.button {
    display: inline-block;
    padding: 10px 20px;
    background-color: #e74c3c;
    color: #fff;
    font-weight: bold;
    text-decoration: none;
    margin: 10px;
    border-radius: 5px;
}