    <style>
        body { font-family: 'Inter', sans-serif; background-color: #f3f4f6; }
        .main-container { max-width: 1200px; margin: auto; }
        .card { background-color: white; border-radius: 12px; box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1); }
        .dashboard-button { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 1.5rem; text-align: center; font-size: 1.125rem; font-weight: 600; color: #1f2937; background-color: white; border-radius: 12px; box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1); transition: all 0.3s ease; }
        .dashboard-button:hover { background-color: #e5e7eb; transform: translateY(-4px); }
        .dashboard-button i { font-size: 2.5rem; margin-bottom: 0.75rem; color: #3b82f6; }
        .form-label { font-weight: 600; color: #4b5563; }
        .form-input, .form-select, .form-textarea { width: 100%; padding: 0.75rem; border: 1px solid #d1d5db; border-radius: 8px; margin-top: 0.25rem; background-color: #f9fafb; }
        .btn { padding: 0.75rem 1.5rem; border-radius: 8px; font-weight: 600; cursor: pointer; transition: background-color 0.2s ease; }
        .btn-primary { background-color: #3b82f6; color: white; }
        .btn-secondary { background-color: #6b7280; color: white; }
        #loading-overlay, #qr-modal, #qr-scanner-view { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.5); z-index: 9999; display: flex; align-items: center; justify-content: center; flex-direction: column; color: white; }
        .spinner { border: 8px solid #f3f3f3; border-top: 8px solid #3b82f6; border-radius: 50%; width: 60px; height: 60px; animation: spin 1s linear infinite; }
        @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
        .tab-button { padding: 0.5rem 1rem; border-bottom: 3px solid transparent; font-weight: 600; cursor: pointer; }
        .tab-button.active { border-bottom-color: #3b82f6; color: #3b82f6; }
        .tab-content { display: none; }
        .tab-content.active { display: block; }
        .mic-button.is-listening { color: #ef4444; }
        .qr-scan-button { position: fixed; bottom: 20px; right: 20px; width: 60px; height: 60px; background-color: #10b981; color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 14px 0 rgba(0,0,0,0.25); z-index: 1000; }
        #qr-reader { width: 90%; max-width: 500px; }

/* Fügen Sie dies am Ende Ihres <style>-Blocks hinzu */
details > summary {
    cursor: pointer;
    padding: 0.5rem;
    background-color: #f9fafb;
    border-radius: 8px;
    font-weight: 600;
    margin-bottom: 0.5rem;
}
details > summary:hover {
    background-color: #f3f4f6;
}
.month-details {
    margin-left: 1.5rem;
}

    </style>