body {
    background-color: #f8f9fa;
}

.drop-zone {
    border: 3px dashed #28a745;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: #f8fff4;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.drop-zone:hover {
    background-color: #e8f5e9;
    border-color: #218838;
}

.drop-zone p {
    color: #6c757d;
    margin-bottom: 1rem;
}

#preview {
    max-width: 100%;
    max-height: 300px;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.stats-item {
    margin-bottom: 0.5rem;
}

.stats-label {
    font-weight: bold;
    color: #495057;
}

.stats-value {
    color: #28a745;
    font-weight: bold;
}

.table th {
    background-color: #f1f8e9;
}

.card {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.05);
    border: none;
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    font-weight: 600;
}

.btn-primary {
    background-color: #28a745;
    border-color: #28a745;
}

.btn-primary:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

#loading {
    padding: 2rem 0;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
}

.alert {
    margin-top: 1rem;
}