body {
    font-family: Arial, sans-serif;
    background-color: #f8f9fa;
    color: #333;
}
h2 {
    color: #007bff;
}

.card {
    border-radius: 8px;
    border: none;
}

.alert-link {
    color: #007bff;
    text-decoration: underline;
}

.alert-warning {
    border-color: #ffeeba;
    background-color: #fff3cd;
    color: #856404;
}

.text-success {
    font-size: 1.2rem;
}

.container {
    max-width: 900px;
}

.section {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.collapsible {
    cursor: pointer;
    font-size: 1.25rem;
}

.collapsible .small {
    display: block;
    font-size: 0.875em;
    color: #6c757d;
}

.loader {
    position: fixed;
    left: 50%;
    top: 50%;
    width: 3em;
    height: 3em;
    border: 0.3em solid rgba(195, 195, 195, 0.6);
    border-left: 0.3em solid #636767;
    border-radius: 50%;
    animation: spin 1.1s infinite linear;
    z-index: 9999;
}

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

.results {
    /*display: none;*/
}

div#stock-lengths .row, div#demand-lengths .row {
    padding: 10px;
    padding-left: 0;
}