#collection_option {
	margin-top: 10px;
	margin-bottom: 10px;
	padding: 10px;
    border: 1px solid #ccc;
}

#add_button {
    float: right;
}

#add_button button {
    border: none;
    background-color: #92D050;
	color: white;
    cursor: pointer;
    width: 50px;	
}

button:focus {
	outline: none;
}

#loading-wheel {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 10px solid #f3f3f3;
    border-top: 10px solid #92D050;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    z-index: 1;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}