#heatmap {
    display: grid;
    grid-template-columns: repeat(7, 0fr); /* 7 Tage in einer Woche */
    gap: 5px;
    width: 100%;
    table-layout: fixed;
}

.day {
    width: 50px;
    height: 50px;
    border: 1px solid #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    table-layout: fixed;
}

@media (max-width: 1400px) {
    .day {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 1200px) {
    .day {
        width: 35px;
        height: 35px;
    }
}

@media (max-width: 992px) {
    .day {
        width: 30px;
        height: 30px;
    }
}

@media (max-width: 767px) {
    .day {
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 450px) {
    .day {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 400px) {
    .day {
        width: 35px;
        height: 35px;
    }
}

@media (max-width: 350px) {
    .day {
        width: 30px;
        height: 30px;
    }
}

@media (max-width: 300px) {
    .day {
        width: 25px;
        height: 25px;
    }
}