:root {
    --color-primary: #006B3F;
    --color-primary-hover: #005432;
    --color-success: #006B3F;
    --color-success-hover: #005432;
    --color-danger: #D42027;
    --color-danger-hover: #B01A20;
    --color-warning: #d97706;
    --color-bg: #f5f7f5;
    --color-bg-white: #ffffff;
    --color-text: #1a2e1a;
    --color-text-light: #5a6b5a;
    --color-border: #d4ddd4;
    --color-sidebar: #004D2C;
    --color-sidebar-hover: #006B3F;
    --color-sidebar-active: #D42027;
    --sidebar-width: 260px;
    --font-base: 16px;
    --font-sm: 14px;
    --font-lg: 20px;
    --font-xl: 24px;
    --font-xxl: 28px;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: var(--font-base);
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: rgba(0, 107, 63, 0.88);
    backdrop-filter: blur(12px);
    color: white;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: width 0.3s ease, transform 0.3s ease;
    overflow: hidden;
}

.sidebar.collapsed {
    width: 68px;
}

.sidebar.collapsed .sidebar-text,
.sidebar.collapsed .sidebar-header img,
.sidebar.collapsed .sidebar-header h1,
.sidebar.collapsed .sidebar-header p,
.sidebar.collapsed .sidebar-bottom span:last-child {
    display: none !important;
}

.sidebar.collapsed .sidebar-header {
    padding: 16px 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar.collapsed .sidebar-header .sidebar-logo-mini {
    display: block !important;
}

.sidebar.collapsed .sidebar-link {
    justify-content: center;
    padding: 16px 0;
    border-left: none;
}

.sidebar.collapsed .sidebar-icon {
    margin: 0;
}

.sidebar-header {
    padding: 20px;
    background: var(--color-sidebar);
    border-bottom: 1px solid rgba(255,255,255,0.15);
}

.sidebar-header img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
}

.sidebar-header h1 {
    font-size: var(--font-xxl);
    font-weight: 700;
    margin-bottom: 2px;
}

.sidebar-header p {
    font-size: var(--font-sm);
    opacity: 0.7;
}

.sidebar-logo-mini {
    display: none !important;
    font-size: 24px;
    font-weight: 900;
    color: white;
    text-align: center;
}

.sidebar-nav {
    list-style: none;
    padding: 12px 0;
    flex: 1;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: var(--font-lg);
    transition: background 0.2s, color 0.2s;
    border-left: 4px solid transparent;
}

.sidebar-link:hover {
    background: rgba(255,255,255,0.1);
    color: white;
}

.sidebar-link.active {
    background: rgba(212, 32, 39, 0.25);
    color: white;
    border-left-color: var(--color-sidebar-active);
}

.sidebar-icon { font-size: 24px; }

.sidebar-toggle {
    background: none;
    border: none;
    color: rgba(255,255,255,0.6);
    padding: 14px;
    cursor: pointer;
    font-size: 20px;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    transition: color 0.2s;
}
.sidebar-toggle:hover { color: white; }

/* Main content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 32px;
    min-height: 100vh;
}

/* Hamburger */
.hamburger {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 200;
    background: var(--color-sidebar);
    border: none;
    border-radius: var(--radius);
    padding: 10px;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 3px;
    background: white;
    border-radius: 2px;
}

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header h2 {
    font-size: var(--font-xl);
    font-weight: 700;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: var(--font-base);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    text-decoration: none;
    line-height: 1;
}

.btn:active { transform: scale(0.97); }

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

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

.btn-danger { background: var(--color-danger); color: white; }
.btn-danger:hover { background: var(--color-danger-hover); }

.btn-secondary { background: var(--color-border); color: var(--color-text); }
.btn-secondary:hover { background: #d1d5db; }

.btn-sm {
    padding: 8px 16px;
    font-size: var(--font-sm);
}

.btn-icon {
    padding: 8px;
    min-width: 40px;
    justify-content: center;
}

/* Filter row */
.filter-row {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.filter-group label {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--color-text-light);
}

.search-input {
    padding: 10px 14px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: var(--font-base);
    min-width: 250px;
    transition: border-color 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

select.filter-select {
    padding: 10px 14px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: var(--font-base);
    background: white;
    min-width: 180px;
    cursor: pointer;
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
    background: var(--color-bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    -webkit-overflow-scrolling: touch;
}

.data-table .sticky-col {
    position: sticky;
    right: 0;
    background: var(--color-bg-white);
    box-shadow: -4px 0 8px rgba(0,0,0,0.06);
    z-index: 2;
}

.data-table thead .sticky-col {
    background: var(--color-sidebar);
    z-index: 3;
}

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

.data-table th {
    background: var(--color-sidebar);
    color: white;
    padding: 10px 8px;
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
    position: sticky;
    top: 0;
    font-size: 13px;
}

.data-table td {
    padding: 10px 8px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.data-table tbody tr:hover { background: #f0f4ff; }
.data-table tbody tr:nth-child(even) { background: #fafafa; }
.data-table tbody tr:nth-child(even):hover { background: #f0f4ff; }

.data-table .text-right { text-align: right; }
.data-table .text-center { text-align: center; }
.data-table .text-nowrap { white-space: nowrap; }

tr.stock-low { background: #fef3c7 !important; }
tr.stock-low:hover { background: #fde68a !important; }
tr.stock-critical { background: #fee2e2 !important; }
tr.stock-critical:hover { background: #fecaca !important; }

.actions-cell {
    display: flex;
    gap: 6px;
    justify-content: center;
}

/* Forms */
.form-container {
    background: var(--color-bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px;
    max-width: 800px;
}

.form-title {
    font-size: var(--font-lg);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-border);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

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

.form-group label {
    font-weight: 600;
    font-size: var(--font-sm);
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 14px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: var(--font-base);
    transition: border-color 0.2s;
    width: 100%;
}

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

.form-group .error {
    border-color: var(--color-danger);
}

.form-group .error-text {
    color: var(--color-danger);
    font-size: 13px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 2px solid var(--color-border);
}

/* Checkbox & radio */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Modals */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 300;
}

.modal-overlay.active { display: block; }

.modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border-radius: var(--radius);
    padding: 28px;
    min-width: 360px;
    max-width: 90vw;
    z-index: 301;
    box-shadow: var(--shadow-lg);
}

.modal.active { display: block; }

.modal-title {
    font-size: var(--font-lg);
    margin-bottom: 12px;
}

.modal-message {
    color: var(--color-text-light);
    margin-bottom: 24px;
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* Toasts */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 400;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius);
    color: white;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    transform: translateX(120%);
    transition: transform 0.3s ease;
    max-width: 400px;
}

.toast-visible { transform: translateX(0); }
.toast-success { background: var(--color-success); }
.toast-error { background: var(--color-danger); }
.toast-warning { background: var(--color-warning); }

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px;
    font-size: var(--font-lg);
    color: var(--color-text-light);
}

/* Placeholder */
.placeholder {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px;
    color: var(--color-text-light);
}

.error-message {
    padding: 20px;
    background: #fee2e2;
    color: var(--color-danger);
    border-radius: var(--radius);
    font-weight: 600;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-ingreso { background: #d1fae5; color: #065f46; }
.badge-egreso { background: #fee2e2; color: #991b1b; }
.badge-venta { background: #dbeafe; color: #1e40af; }
.badge-ajuste { background: #f3f4f6; color: #374151; }

/* Preview table (for price updates) */
.preview-table .price-old { color: var(--color-text-light); text-decoration: line-through; }
.preview-table .price-new { color: var(--color-success); font-weight: 700; }
.preview-table .price-up { color: var(--color-danger); }
.preview-table .price-down { color: var(--color-success); }

/* Comprobante print */
.comprobante-print {
    font-family: 'Courier New', monospace;
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    background: white;
    border: 2px dashed var(--color-border);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--color-border);
}

.tab {
    padding: 12px 24px;
    cursor: pointer;
    font-size: var(--font-base);
    font-weight: 600;
    color: var(--color-text-light);
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: color 0.2s, border-color 0.2s;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
}

.tab:hover { color: var(--color-primary); }
.tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

/* Cart / invoice items */
.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border-bottom: 1px solid var(--color-border);
}

.cart-total {
    font-size: var(--font-xl);
    font-weight: 700;
    text-align: right;
    padding: 20px;
    background: #f0f4ff;
    border-radius: var(--radius);
    margin-top: 16px;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar { width: 220px; }
    .main-content { margin-left: 220px; padding: 24px; }
    :root { --sidebar-width: 220px; }
}

.help-card {
    background: linear-gradient(135deg, #f0faf4, #e8f5ee);
    border: 2px solid #006B3F;
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 16px;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    .sidebar.open { transform: translateX(0); }
    .hamburger { display: flex; }
    .main-content { margin-left: 0; padding: 16px; padding-top: 60px; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .filter-row { flex-direction: column; }
    .search-input, select.filter-select { min-width: 100%; }
    .form-row { grid-template-columns: 1fr; }
    .form-container { padding: 16px; }
    .modal { min-width: auto; width: 90vw; }
}

/* Print */
@media print {
    .sidebar, .hamburger, .toast-container, .modal-overlay, .modal,
    .filter-row, .page-header, .actions-cell, .form-actions,
    .tabs, .no-print { display: none !important; }
    .main-content { margin-left: 0 !important; padding: 0; }
    .comprobante-print { border: none; box-shadow: none; }
    #app-container { display: block !important; }
}