.clockBox {
    background: white;
    width: 500px;
    margin: auto;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    justify-content: center; /* vertikal zentrieren */
    align-items: center; /* horizontal zentrieren */
    min-height: 100%; /* wichtig innerhalb der Bootstrap-Spalte */
    text-align: center;
}

.clock {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#time {
    font-size: 22px;
    margin: 10px 0;
    font-weight: bold;
}

#symbol {
    width: 100px;
    height: 100px;
    transition: opacity 0.2s ease-in-out;
}

.fade {
    opacity: 0;
}