.card-header {
    font-weight: bold;
}
.editable-cell[contenteditable="true"]:focus {
    outline: 2px solid red; /* Red outline when focused */
    background-color: #f8d7da; /* Light red background for focused editable cells */
}

.loading-message {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* semi-transparent background */
    color: white;
    font-size: 2em;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000; /* ensures the loading message is above everything else */
}

.spinner {
    border: 8px solid #f3f3f3; /* Light grey */
    border-top: 8px solid red; /* Red spinner */
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 2s linear infinite;
    margin-bottom: 20px; /* Space between spinner and text */
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}