body {
    background-color: #f8f9fa;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

h1 {
    color: #333;
    font-weight: 700;
}

.card {
    border: none;
    border-radius: 10px;
}

.card-header {
    border-radius: 10px 10px 0 0 !important;
    font-weight: 600;
}

.form-label {
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.5rem;
}

.form-control {
    border-radius: 6px;
    border: 1px solid #dee2e6;
    padding: 0.75rem;
}

.form-control:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.btn-primary {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    border: none;
    border-radius: 8px;
    padding: 0.75rem 2rem;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.4);
}

#generatedCode {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

#copyBtn {
    transition: transform 0.2s;
}

#copyBtn:hover {
    transform: scale(1.05);
}

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

.text-danger {
    color: #dc3545 !important;
}

pre {
    margin: 0;
}

/* Estilos para el área de Excel */
.bg-light {
    background-color: #f8f9fa !important;
}

#excelData {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    resize: vertical;
}

#excelData:focus {
    border-color: #198754;
    box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.25);
}

.btn-success {
    background: linear-gradient(135deg, #198754 0%, #157347 100%);
    border: none;
}

.btn-success:hover {
    background: linear-gradient(135deg, #157347 0%, #0f5132 100%);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(25, 135, 84, 0.3);
}