:root {
    --bg-primary: #f5f5f7;
    --bg-secondary: #ffffff;
    --bg-sidebar: #1a1a2e;
    --bg-sidebar-hover: #252542;
    --bg-sidebar-active: #2d2d4a;
    
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-muted: #8e8e93;
    --text-sidebar: #a0a0b0;
    --text-sidebar-active: #ffffff;
    
    --accent-primary: #0066cc;
    --accent-primary-hover: #0055aa;
    --accent-success: #34c759;
    --accent-warning: #ff9500;
    --accent-danger: #ff3b30;
    
    --border-color: #d2d2d7;
    --border-light: #e5e5e7;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
    
    --radius-sm: 4px;
    --radius-md: 6px;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 11px;
    --font-size-sm: 12px;
    --font-size-base: 13px;
    --font-size-md: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-2xl: 20px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-primary);
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 220px;
    background: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 14px 15px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-sidebar-active);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-logo {
    max-width: 190px;
    height: auto;
    filter: brightness(0) invert(1);
    margin: 4px 0;
}

.sidebar-nav {
    flex: 1;
    padding: 8px 0;
    overflow-y: auto;
}

.sidebar-footer {
    padding: 12px 15px;
    border-top: 1px solid rgba(255,255,255,0.08);
    flex-shrink: 0;
}

.sidebar-user {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-user-name {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.7);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-logout-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 6px;
    background: rgba(255,255,255,0.08);
    transition: background 0.2s, color 0.2s;
    margin-top: 6px;
    font-weight: 500;
}

.sidebar-logout-btn:hover {
    background: rgba(255,107,107,0.18);
    color: #ff6b6b;
}

.nav-section {
    margin-bottom: 4px;
}

.nav-section.collapsible .nav-section-title {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    transition: background 0.15s;
}

.nav-section.collapsible .nav-section-title:hover {
    background: var(--bg-sidebar-hover);
}

.nav-arrow {
    font-size: 10px;
    transition: transform 0.2s ease;
    color: var(--text-muted);
}

.nav-section.collapsed .nav-arrow {
    transform: rotate(-90deg);
}

.nav-section-content {
    overflow: hidden;
    transition: max-height 0.25s ease;
}

.nav-section-title {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 16px 6px;
}

.nav-section-single {
    margin-bottom: 0;
}

.nav-section-link {
    display: block;
    padding: 10px 16px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background 0.15s, color 0.15s;
}

.nav-section-link:hover {
    background: var(--bg-sidebar-hover);
    color: var(--text-sidebar-active);
}

.nav-section-link.active {
    background: var(--bg-sidebar-active);
    color: var(--text-sidebar-active);
    border-left: 2px solid var(--accent-primary);
}

.nav-item {
    display: block;
    padding: 8px 16px 8px 24px;
    color: var(--text-sidebar);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: background 0.15s, color 0.15s;
}

.nav-item:hover {
    background: var(--bg-sidebar-hover);
    color: var(--text-sidebar-active);
}

.nav-item.active {
    background: var(--bg-sidebar-active);
    color: var(--text-sidebar-active);
    border-left: 2px solid var(--accent-primary);
    padding-left: 22px;
}

.nav-item-parent {
    padding-left: 16px;
    font-weight: 500;
}

.main-content {
    flex: 1;
    margin-left: 220px;
    min-height: 100vh;
}

.page-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
    padding: 16px 24px;
}

.page-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.page-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: 2px;
}

.page-body {
    padding: 20px 24px;
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.card-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 16px;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-light);
}

.status-item:last-child {
    border-bottom: none;
}

.status-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.status-value {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
}

.status-value.success {
    color: var(--accent-success);
}

.status-value.warning {
    color: var(--accent-warning);
}

.status-value.danger {
    color: var(--accent-danger);
}

.alert-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.alert-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--border-color);
}

.alert-item.warning {
    border-left-color: var(--accent-warning);
}

.alert-item.danger {
    border-left-color: var(--accent-danger);
}

.alert-item.info {
    border-left-color: var(--accent-primary);
}

.alert-text {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.alert-count {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    min-width: 40px;
    text-align: right;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    text-decoration: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-primary-hover);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-light);
}

.btn-success {
    background: var(--accent-success);
    color: white;
}

.btn-lg {
    padding: 12px 24px;
    font-size: var(--font-size-md);
}

.btn-full {
    width: 100%;
}

.action-section {
    text-align: center;
    padding: 24px;
}

.action-hint {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: 8px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.data-table th {
    text-align: left;
    padding: 10px 12px;
    background: var(--bg-primary);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
}

.data-table tbody tr:hover {
    background: var(--bg-primary);
}

.data-table .mono {
    font-family: 'SF Mono', 'Consolas', monospace;
    font-size: var(--font-size-xs);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: 10px;
    white-space: nowrap;
}

.badge-success {
    background: rgba(52, 199, 89, 0.12);
    color: var(--accent-success);
}

.badge-warning {
    background: rgba(255, 149, 0, 0.12);
    color: var(--accent-warning);
}

.badge-danger {
    background: rgba(255, 59, 48, 0.12);
    color: var(--accent-danger);
}

.badge-info {
    background: rgba(0, 102, 204, 0.12);
    color: var(--accent-primary);
}

.badge-neutral {
    background: var(--bg-primary);
    color: var(--text-secondary);
}

.badge-muted {
    background: rgba(142, 142, 147, 0.12);
    color: var(--text-secondary);
}

.criteria-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.criteria-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 8px 0;
}

.criteria-item .badge {
    flex-shrink: 0;
    min-width: 60px;
    justify-content: center;
}

.criteria-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

.text-danger {
    color: var(--accent-danger) !important;
}

.text-warning {
    color: var(--accent-warning) !important;
}

.chip {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    font-size: var(--font-size-xs);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    margin: 2px;
    color: var(--text-secondary);
}

.level-muy-urgente {
    color: var(--accent-danger);
    font-weight: 600;
}

.level-urgente {
    color: var(--accent-warning);
    font-weight: 600;
}

.level-proximo {
    color: var(--accent-primary);
}

.grid {
    display: grid;
    gap: 16px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
    }
}

.spacer {
    height: 16px;
}

.spacer-lg {
    height: 24px;
}

.upload-area {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    cursor: pointer;
    background: var(--bg-secondary);
    transition: all 0.2s ease;
    display: block;
}

.card-body p,
.card-body form,
.card-body label,
.card-body .spacer,
.card-body .spacer-lg {
    border: none !important;
    outline: none !important;
    box-shadow: none;
}

.upload-area:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 102, 204, 0.04);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.08);
}

.upload-area:hover .upload-icon {
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.upload-area input[type="file"] {
    display: none;
}

.upload-icon {
    color: var(--text-muted);
    margin-bottom: 16px;
    transition: all 0.2s ease;
}

.upload-icon svg {
    display: block;
    margin: 0 auto;
}

.upload-text {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.upload-hint {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-input, .form-select {
    width: 100%;
    padding: 8px 12px;
    font-size: var(--font-size-sm);
    font-family: inherit;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: border-color 0.15s;
}

.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: 4px;
}

.checklist {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.checklist-item.success {
    color: var(--accent-success);
}

.checklist-item.error {
    color: var(--accent-danger);
}

.progress-steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 16px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.progress-step {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.progress-step.active {
    color: var(--accent-primary);
    font-weight: 500;
}

.progress-step.complete {
    color: var(--accent-success);
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
}

.summary-stat {
    text-align: center;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.summary-stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
}

.summary-stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 2px;
}

.filters {
    display: flex;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.filter-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.filter-select {
    padding: 4px 8px;
    font-size: var(--font-size-xs);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
}

.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 36px;
    margin-bottom: 12px;
    opacity: 0.4;
}

.empty-state-text {
    font-size: var(--font-size-sm);
}

.empty-state-hint {
    font-size: var(--font-size-xs);
    margin-top: 4px;
}

.flash-messages {
    padding: 0 24px;
    margin-top: 16px;
}

.flash-message {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    margin-bottom: 8px;
}

.flash-message.success {
    background: rgba(52, 199, 89, 0.1);
    color: var(--accent-success);
    border: 1px solid rgba(52, 199, 89, 0.2);
}

.flash-message.error {
    background: rgba(255, 59, 48, 0.1);
    color: var(--accent-danger);
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.section-divider {
    height: 1px;
    background: var(--border-light);
    margin: 24px 0;
}

.text-muted {
    color: var(--text-muted);
}

.text-secondary {
    color: var(--text-secondary);
}

.text-success {
    color: var(--accent-success);
}

.text-warning {
    color: var(--accent-warning);
}

.text-danger {
    color: var(--accent-danger);
}

.font-mono {
    font-family: 'SF Mono', 'Consolas', monospace;
}

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }

/* Prediccion Cards */
.prediccion-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.prediccion-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: box-shadow 0.15s ease;
}

.prediccion-card:hover {
    box-shadow: var(--shadow-md);
}

.prediccion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    cursor: pointer;
    background: var(--bg-secondary);
}

.prediccion-header:hover {
    background: var(--bg-primary);
}

.prediccion-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.prediccion-cliente {
    font-weight: 600;
    font-size: var(--font-size-md);
    color: var(--text-primary);
    min-width: 180px;
}

.prediccion-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.prediccion-tipo {
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.prediccion-tipo.success { color: var(--accent-success); }
.prediccion-tipo.warning { color: var(--accent-warning); }
.prediccion-tipo.muted { color: var(--text-muted); }

.prediccion-arrow {
    color: var(--text-muted);
    font-size: 10px;
    transition: transform 0.2s ease;
}

.prediccion-card[data-expanded="true"] .prediccion-arrow {
    transform: rotate(180deg);
}

.prediccion-body {
    display: none;
    padding: 16px;
    border-top: 1px solid var(--border-light);
    background: var(--bg-primary);
}

.prediccion-card[data-expanded="true"] .prediccion-body {
    display: block;
}

.prediccion-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.prediccion-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.prediccion-stat .stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.prediccion-stat .stat-value {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
}

.prediccion-stat .stat-value.success { color: var(--accent-success); }
.prediccion-stat .stat-value.danger { color: var(--accent-danger); }

.prediccion-productos {
    margin-top: 12px;
}

.productos-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table.compact {
    font-size: var(--font-size-sm);
}

.data-table.compact th,
.data-table.compact td {
    padding: 6px 10px;
}

.producto-codigo {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 1px 4px;
    border-radius: 3px;
    margin-right: 6px;
}