body {
    font-family: Arial, sans-serif;
    background-color: #efefef;
    margin: 20px;
}

.kalender-container {
    max-width: 1000px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
}

.kalender-header {
    display: grid;
    grid-template-columns: 1fr repeat(7, 1fr);
    background-color: #ddd;
    font-weight: bold;
    text-align: center;
    padding: 10px 0;
}

.kalender-tag {
    padding: 5px;
}

.kalender-body {
    display: grid;
    grid-template-columns: 1fr repeat(7, 1fr);
}

.kalender-zeile {
    display: contents;
}

.zeit {
    text-align: center;
    padding: 10px;
    background: #eee;
    border: 1px solid #ccc;
}

.slot {
    border: 1px solid #ccc;
    height: 40px;
    background-color: #efefef;
    display: flex;
    justify-content: center;
    align-items: center;
}

.slot.frei {
    background-color: #a0e0a0;
    cursor: pointer;
}

.slot.belegt {
    background-color: #ccc;
}

.kalender-footer {
    text-align: right;
    margin-top: 20px;
}

.weiter-button {
    padding: 10px 20px;
    background-color: #555;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    margin-left: 10px;
}

/* Mobile Ansicht */
.kalender-mobil {
    display: none;
}

.tag-mobil {
    background: #f9f9f9;
    border: 1px solid #ddd;
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 6px;
}

.tag-mobil h3 {
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .kalender-desktop {
        display: none;
    }

    .kalender-mobil {
        display: block;
    }

    .slot {
        height: auto;
        padding: 10px;
        margin-bottom: 5px;
    }

    .slot.frei,
    .slot.belegt {
        border-radius: 4px;
    }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.6);
    top: 0; left: 0; right: 0; bottom: 0;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    padding: 20px;
    border-radius: 8px;
    width: 300px;
    text-align: center;
}

.modal-content input[type="email"],
.modal-content button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
}

.modal-content label {
    display: block;
    margin-top: 10px;
}

.modal-content input[type="text"],
.modal-content input[type="email"],
.modal-content input[type="tel"] {
    width: 100%;
    padding: 8px;
    margin-top: 4px;
}

.modal-content input[type="radio"] {
    margin-right: 6px;
    margin-top: 10px;
}

.modal-content input[type="checkbox"] {
    margin-right: 8px;
    vertical-align: middle;
}

label.error {
    color: red;
}

.slot.leer {
    background-color: #EFEFEF;
    border: none;
}

.slot.leer {
    background-color: #fff;
    border: 1px dashed #ccc;
    cursor: pointer;
}
.slot.frei {
    background-color: #c2f0c2;
    cursor: pointer;
}
.slot.belegt {
    background-color: #ccc;
    cursor: not-allowed;
}

.kalender-tag {
    text-align: center;
    padding: 5px;
    font-weight: bold;
    text-decoration: none;
    color: #333;
    display: block;
    border-radius: 5px;
}
.kalender-tag:hover {
    background: #e0e0e0;
    cursor: pointer;
}