:root {
    --ns-green: #28a745;
    --ns-dark: #212529;
    --ns-gray: #6c757d;
}

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

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.navbar-brand {
    display: flex;
    align-items: center;
}

.list-group-item {
    border-left: 3px solid transparent;
    transition: all 0.3s ease;
}

.list-group-item:hover {
    background-color: #f8f9fa;
    border-left-color: var(--ns-green);
}

.list-group-item.active {
    background-color: var(--ns-green);
    border-color: var(--ns-green);
    border-left-color: var(--ns-dark);
}

.card {
    border: none;
    box-shadow: 0 2px 8px rgba(0,0,0,.1);
    margin-bottom: 20px;
}

.card-header {
    border-bottom: none;
}

/* Upload Zone */
.upload-zone {
    border: 3px dashed #28a745;
    border-radius: 10px;
    padding: 60px 20px;
    text-align: center;
    background-color: #f8f9fa;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-zone:hover {
    background-color: #e9ecef;
    border-color: #1e7e34;
}

.upload-zone.dragover {
    background-color: #d4edda;
    border-color: #1e7e34;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 64px;
    color: var(--ns-green);
    margin-bottom: 20px;
}

/* File Preview */
#filePreview .card {
    background-color: #e9ecef;
}

/* Progress */
.progress {
    height: 25px;
}

/* Table */
.table {
    background-color: white;
}

.badge-estado {
    font-size: 0.85em;
    padding: 5px 10px;
}

/* Buttons */
.btn-success {
    background-color: var(--ns-green);
    border-color: var(--ns-green);
}

.btn-success:hover {
    background-color: #1e7e34;
    border-color: #1c7430;
}

/* Stats Cards */
.card h2 {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 10px;
}

/* Modal */
.modal-xl {
    max-width: 1200px;
}

pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-size: 0.85rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert {
    animation: fadeIn 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    .upload-zone {
        padding: 40px 20px;
    }
    
    .upload-icon {
        font-size: 48px;
    }
}

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

/* Tooltips */
[data-bs-toggle="tooltip"] {
    cursor: help;
}