:root {
  --font-sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color-scheme: light dark; /* hint UA form controls */

  /* Light Theme */
  --bg-primary-light: #f4f7fa;
  --bg-secondary-light: #ffffff;
  --text-primary-light: #1a202c;
  --text-secondary-light: #5a6474;
  --border-light: #e2e8f0;
  --accent-primary-light: #3b82f6;
  --accent-primary-hover-light: #2563eb;
  --danger-light: #ef4444;
  --danger-hover-light: #dc2626;
  --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --success-light: #22c55e;
  --warning-light: #f59e0b;
  --info-light: #0ea5e9;
  --focus-ring-light: rgba(59, 130, 246, 0.35); /* fallback for older browsers */

  /* Dark Theme */
  --bg-primary-dark: #1a202c;
  --bg-secondary-dark: #2d3748;
  --text-primary-dark: #f7fafc;
  --text-secondary-dark: #a0aec0;
  --border-dark: #4a5568;
  --accent-primary-dark: #60a5fa;
  --accent-primary-hover-dark: #3b82f6;
  --danger-dark: #f87171;
  --danger-hover-dark: #ef4444;
  --shadow-dark: 0 1px 3px 0 rgba(0, 0, 0, 0.2), 0 1px 2px 0 rgba(0, 0, 0, 0.16);
  --success-dark: #4ade80;
  --warning-dark: #facc15;
  --info-dark: #38bdf8;
  --focus-ring-dark: rgba(96, 165, 250, 0.35);
}

/* Theme maps */
[data-theme='light'], :root:not([data-theme]), [data-theme='auto'] {
  --bg-primary: var(--bg-primary-light);
  --bg-secondary: var(--bg-secondary-light);
  --text-primary: var(--text-primary-light);
  --text-secondary: var(--text-secondary-light);
  --border-color: var(--border-light);
  --accent-primary: var(--accent-primary-light);
  --accent-primary-hover: var(--accent-primary-hover-light);
  --danger: var(--danger-light);
  --danger-hover: var(--danger-hover-light);
  --shadow: var(--shadow-light);
  --success: var(--success-light);
  --warning: var(--warning-light);
  --info: var(--info-light);
  --focus-ring: var(--focus-ring-light);
}

[data-theme='dark'] {
  --bg-primary: var(--bg-primary-dark);
  --bg-secondary: var(--bg-secondary-dark);
  --text-primary: var(--text-primary-dark);
  --text-secondary: var(--text-secondary-dark);
  --border-color: var(--border-dark);
  --accent-primary: var(--accent-primary-dark);
  --accent-primary-hover: var(--accent-primary-hover-dark);
  --danger: var(--danger-dark);
  --danger-hover: var(--danger-hover-dark);
  --shadow: var(--shadow-dark);
  --success: var(--success-dark);
  --warning: var(--warning-dark);
  --info: var(--info-dark);
  --focus-ring: var(--focus-ring-dark);
}

/* Auto theme follows OS if requested */
@media (prefers-color-scheme: dark) {
  [data-theme='auto'] {
    --bg-primary: var(--bg-primary-dark);
    --bg-secondary: var(--bg-secondary-dark);
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --border-color: var(--border-dark);
    --accent-primary: var(--accent-primary-dark);
    --accent-primary-hover: var(--accent-primary-hover-dark);
    --danger: var(--danger-dark);
    --danger-hover: var(--danger-hover-dark);
    --shadow: var(--shadow-dark);
    --success: var(--success-dark);
    --warning: var(--warning-dark);
    --info: var(--info-dark);
    --focus-ring: var(--focus-ring-dark);
  }
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s, color 0.3s;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

#root { display: flex; height: 100%; width: 100%; }

/* App Layout */
.app-container { display: flex; width: 100%; height: 100%; overflow: hidden; }

.sidebar {
  width: 260px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex; flex-direction: column;
  padding: 1.5rem 0;
  transition: width 0.3s ease, margin-left 0.3s ease, transform 0.3s ease;
  flex-shrink: 0;
}
.sidebar.collapsed { width: 80px; }

.sidebar-header { padding: 0 1.5rem; margin-bottom: 2rem; display: flex; align-items: center; gap: 0.75rem; }
.sidebar.collapsed .sidebar-header { justify-content: center; padding: 0; }

.logo-icon { font-size: 2rem; color: var(--accent-primary); }
.logo-text { font-size: 1.25rem; font-weight: 700; white-space: nowrap; overflow: hidden; opacity: 1; transition: opacity 0.3s; }
.sidebar.collapsed .logo-text { opacity: 0; width: 0; }

.nav-list { list-style: none; flex-grow: 1; overflow-y: auto; }
.nav-item a { display: flex; align-items: center; padding: 0.8rem 1.5rem; color: var(--text-secondary); text-decoration: none; border-radius: 6px; margin: 0.25rem 1rem; font-weight: 500; transition: background-color 0.2s, color 0.2s; white-space: nowrap; overflow: hidden; }
.sidebar.collapsed .nav-item a { justify-content: center; }
.nav-item a:hover { background-color: var(--bg-primary); color: var(--text-primary); }
.nav-item a.active { background-color: var(--accent-primary); color: #fff; }
.nav-item .icon { margin-right: 1rem; font-size: 1.5rem; transition: margin-right 0.3s; }
.sidebar.collapsed .nav-item .icon { margin-right: 0; }
.nav-item .text { opacity: 1; transition: opacity 0.3s; }
.sidebar.collapsed .nav-item .text { opacity: 0; width: 0; }

.main-panel { flex-grow: 1; display: flex; flex-direction: column; overflow-y: auto; overflow-x: hidden; position: relative; }

.header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 2rem; background-color: var(--bg-secondary); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 10; }
.header-left, .header-right { display: flex; align-items: center; gap: 1rem; }

.main-content { padding: 2rem; flex-grow: 1; }

.page-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.5rem; }
.page-title { font-size: 1.75rem; font-weight: 700; }
.page-actions { display: flex; gap: 0.75rem; align-items: center; }
.page-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; margin-bottom: 1.5rem; }

.search-container { position: relative; flex-grow: 1; min-width: 250px; }
.search-container .material-symbols-outlined { position: absolute; left: 0.75rem; top: 50%; transform: translateY(-50%); color: var(--text-secondary); }
.search-container input { padding-left: 2.5rem; }

.filter-bar { display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-end; }
.filter-group { display: flex; align-items: center; gap: 0.5rem; }
.filter-group label { font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); white-space: nowrap; }
.active-filter-display { display: flex; align-items: center; gap: 0.5rem; background-color: var(--bg-secondary); padding: 0.25rem 0.75rem; border-radius: 9999px; font-size: 0.875rem; }
.active-filter-display strong { color: var(--accent-primary); }

/* Image Uploader & Camera */
.image-uploader { display: flex; gap: 1rem; align-items: flex-start; }
.image-preview { width: 100px; height: 100px; border: 2px dashed var(--border-color); border-radius: 8px; display: flex; align-items: center; justify-content: center; overflow: hidden; flex-shrink: 0; }
.image-preview img { width: 100%; height: 100%; object-fit: cover; }
.image-placeholder { display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--text-secondary); font-size: 0.75rem; text-align: center; }
.image-placeholder .material-symbols-outlined { font-size: 2.5rem; margin-bottom: 0.25rem; }
.image-controls { flex-grow: 1; display: flex; flex-direction: column; gap: 0.75rem; }
.image-buttons { display: flex; align-items: center; gap: 0.5rem; }
.image-buttons .button-secondary { padding: 0.5rem 0.75rem; font-size: 0.875rem; }
.image-buttons .icon-button { margin-left: auto; }
.camera-container { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
#camera-feed { width: 100%; max-width: 500px; height: auto; border-radius: 8px; background-color: #000; }
.camera-controls { display: flex; justify-content: center; }
.capture-button { font-size: 1rem; padding: 0.75rem 1.5rem; }

/* --- GENERIC COMPONENTS --- */
.card { background-color: var(--bg-secondary); border-radius: 8px; box-shadow: var(--shadow); overflow: auto; margin-bottom: 1.5rem; }
.card-title { font-size: 1.25rem; font-weight: 600; padding: 1rem 1.5rem; border-bottom: 1px solid var(--border-color); }

/* Buttons */
.button, .button-secondary, .button-danger {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.6rem 1.2rem; border: 1px solid transparent; border-radius: 6px;
  font-weight: 600; font-size: 0.875rem; cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s, background-color 0.2s, color 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.button:disabled, .button-secondary:disabled, .button-danger:disabled { opacity: 0.6; cursor: not-allowed; }
.button:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06); }
.button { background-color: var(--accent-primary); color: #fff; }
.button:hover:not(:disabled) { background-color: var(--accent-primary-hover); }
.button-secondary { background-color: var(--bg-secondary); color: var(--text-primary); border-color: var(--border-color); }
.button-secondary:hover:not(:disabled) { background-color: var(--bg-primary); border-color: var(--text-secondary); }
.button-secondary.active { background-color: var(--accent-primary); color: #fff; border-color: var(--accent-primary); }
.button-danger { background-color: var(--danger); color: #fff; }
.button-danger:hover:not(:disabled) { background-color: var(--danger-hover); }

.icon-button { background: none; border: none; cursor: pointer; color: var(--text-secondary); border-radius: 50%; width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center; transition: background-color 0.2s, color 0.2s, transform 0.2s; }
.icon-button:hover { background-color: var(--bg-primary); color: var(--text-primary); transform: scale(1.1); }
.icon-button-delete:hover { color: var(--danger); }

/* Keyboard access clarity */
.button:focus-visible, .button-secondary:focus-visible, .button-danger:focus-visible, .icon-button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid transparent; /* avoid default outline cutoffs */
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.button-group { display: flex; }
.button-group .button, .button-group .button-secondary { border-radius: 0; box-shadow: none; transform: none; }
.button-group > *:first-child { border-top-left-radius: 6px; border-bottom-left-radius: 6px; }
.button-group > *:last-child { border-top-right-radius: 6px; border-bottom-right-radius: 6px; }
.button-group > *:not(:last-child) { border-right: none; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 500; margin-bottom: 0.5rem; color: var(--text-secondary); }
input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="search"], input[type="date"], textarea, select {
  width: 100%; padding: 0.6rem 0.8rem; border: 1px solid var(--border-color); background-color: var(--bg-secondary); border-radius: 6px; color: var(--text-primary); font-size: 0.875rem; transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
}
input:disabled { background-color: var(--border-color); cursor: not-allowed; }
textarea { resize: vertical; }
.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.form-row .form-group { flex: 1; }
small { font-size: 0.75rem; color: var(--text-secondary); display: block; margin-top: 0.25rem; }
.input-error-message { color: var(--danger); font-size: 0.75rem; margin-top: 0.25rem; }
.row-error td { background-color: rgba(239, 68, 68, 0.1); }

/* Tables */
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border-color); vertical-align: middle; }
th { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; color: var(--text-secondary); }
td { font-size: 0.875rem; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background-color: var(--bg-primary); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.font-mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.actions-cell { display: flex; gap: 0.25rem; }
.checkbox-cell { width: 20px; }
.selected-row { background-color: rgba(59, 130, 246, 0.1) !important; }

/* Pagination */
.pagination { display: flex; justify-content: flex-end; align-items: center; padding: 1rem; border-top: 1px solid var(--border-color); }
.pagination-button { background: none; border: 1px solid var(--border-color); padding: 0.5rem 0.8rem; cursor: pointer; color: var(--text-secondary); transition: all 0.2s; }
.pagination-button:first-child { border-top-left-radius: 6px; border-bottom-left-radius: 6px; }
.pagination-button:last-child { border-top-right-radius: 6px; border-bottom-right-radius: 6px; }
.pagination-button:not(:last-child) { border-right: none; }
.pagination-button.active { background-color: var(--accent-primary); color: #fff; border-color: var(--accent-primary); }
.pagination-button:disabled { opacity: 0.5; cursor: not-allowed; }

/* Modals */
.modal-overlay { position: fixed; inset: 0; background-color: rgba(0, 0, 0, 0.5); display: flex; align-items: center; justify-content: center; z-index: 1000; opacity: 0; transition: opacity 0.3s ease; }
.modal-overlay.open { opacity: 1; }
.modal-content { background-color: var(--bg-secondary); border-radius: 8px; box-shadow: var(--shadow); width: 90%; max-height: 90vh; display: flex; flex-direction: column; transform: scale(0.95); transition: transform 0.3s ease; }
.modal-overlay.open .modal-content { transform: scale(1); }
.modal-sm { max-width: 400px; } .modal-md { max-width: 600px; } .modal-lg { max-width: 900px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; border-bottom: 1px solid var(--border-color); }
.modal-header h2 { font-size: 1.25rem; font-weight: 600; }
.modal-body { padding: 1.5rem; overflow-y: auto; }
.modal-footer { display: flex; justify-content: flex-end; gap: 0.75rem; padding: 1rem 1.5rem; border-top: 1px solid var(--border-color); }

/* Specific Component Styles */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.stat-card { padding: 1.5rem; }
.stat-card-header { display: flex; justify-content: space-between; align-items: center; color: var(--text-secondary); font-weight: 500; }
.stat-card-icon { font-size: 1.75rem; }
.stat-card-value { font-size: 2rem; font-weight: 700; margin: 0.5rem 0; }
.stat-card-change { font-size: 0.875rem; }
.stat-card-change.positive { color: var(--success); }
.stat-card-change.negative { color: var(--danger); }

.ai-insights-container { padding: 1.5rem; }
.ai-input-group { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.ai-input { flex-grow: 1; }
.ai-result { background-color: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 6px; padding: 1rem; min-height: 50px; }
.ai-result.loading { display: flex; align-items: center; gap: 0.75rem; color: var(--text-secondary); }

.spinner { width: 20px; height: 20px; border: 2px solid currentColor; border-top-color: transparent; border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.full-page-loader, .full-page-error { width: 100%; height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1rem; }
.full-page-error .error-icon { font-size: 3rem; color: var(--danger); }

/* Profile Modal */
.profile-modal-section-title { font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
.profile-modal-separator { border: none; border-top: 1px solid var(--border-color); margin: 1.5rem 0; }

/* Products Page */
.products-table .product-image-cell { width: 100px; }
.product-thumbnail { width: 40px; height: 40px; object-fit: cover; border-radius: 4px; }
.product-description-cell { max-width: 250px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stock-status { padding: 0.2rem 0.6rem; border-radius: 9999px; font-size: 0.75rem; font-weight: 600; white-space: nowrap; }
.stock-status.in-stock { background-color: rgba(34, 197, 94, 0.1); color: var(--success); }
.stock-status.low-stock { background-color: rgba(245, 158, 11, 0.1); color: var(--warning); }
.stock-status.out-of-stock { background-color: rgba(239, 68, 68, 0.1); color: var(--danger); }

.bulk-action-bar { position: sticky; bottom: 0; left: 0; right: 0; background-color: var(--bg-secondary); padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 -2px 10px rgba(0,0,0,0.1); z-index: 5; animation: slide-up 0.3s ease; }
@keyframes slide-up { from { transform: translateY(100%); } to { transform: translateY(0); } }

/* Status Badges */
.status-badge { padding: 0.2rem 0.6rem; border-radius: 9999px; font-size: 0.75rem; font-weight: 600; white-space: nowrap; }
.status-paid { background-color: rgba(34, 197, 94, 0.1); color: var(--success); }
.status-partial { background-color: rgba(245, 158, 11, 0.1); color: var(--warning); }
.status-unpaid { background-color: rgba(239, 68, 68, 0.1); color: var(--danger); }

/* Role Badges */
.role-badge { padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.75rem; font-weight: 600; white-space: nowrap; }
.role-admin { background-color: rgba(239, 68, 68, 0.1); color: var(--danger); }
.role-manager { background-color: rgba(59, 130, 246, 0.1); color: var(--accent-primary); }
.role-staff { background-color: rgba(139, 92, 246, 0.1); color: #8b5cf6; }
.role-customer { background-color: rgba(14, 165, 233, 0.1); color: var(--info); }
.role-vendor { background-color: rgba(245, 158, 11, 0.1); color: var(--warning); }

/* Sale Modal */
.item-entry-card { background-color: var(--bg-primary); padding: 1rem; margin: 1.5rem 0; }
.product-select { flex: 3 !important; }
.quantity-select { flex: 1 !important; }
.modal-items-table { margin-bottom: 1rem; }
.sale-summary { display: flex; justify-content: space-between; align-items: flex-end; }
.summary-details { text-align: right; }
.summary-details p { font-size: 1.1rem; }

/* Login Page */
.login-container { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; background-color: var(--bg-primary); }
.login-box { width: 100%; max-width: 400px; padding: 2.5rem; background-color: var(--bg-secondary); border-radius: 8px; box-shadow: var(--shadow); }
.login-header { text-align: center; margin-bottom: 2rem; }
.login-header .logo-icon { font-size: 3rem; }
.login-header h1 { font-size: 1.75rem; font-weight: 700; }
.login-header p { color: var(--text-secondary); }
.login-form { display: flex; flex-direction: column; }
.login-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 1.5rem; }
.forgot-password-link { font-size: 0.875rem; color: var(--accent-primary); text-decoration: none; }
.login-button { width: 120px; }
.error-message { color: var(--danger); background-color: rgba(239, 68, 68, 0.1); padding: 0.75rem; border-radius: 6px; font-size: 0.875rem; margin-top: 1rem; text-align: center; }
.success-message { color: var(--success); background-color: rgba(34, 197, 94, 0.1); padding: 0.75rem; border-radius: 6px; font-size: 0.875rem; margin-bottom: 1rem; text-align: center; }
.token-display { background-color: var(--bg-primary); padding: 0.5rem; border-radius: 4px; word-break: break-all; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; margin: 1rem 0; }

/* Header Profile Dropdown */
.profile-container { position: relative; }
.profile-button { display: flex; align-items: center; gap: 0.5rem; background: none; border: none; cursor: pointer; color: var(--text-primary); font-weight: 600; }
.profile-dropdown { position: absolute; top: 120%; right: 0; background-color: var(--bg-secondary); border-radius: 8px; box-shadow: var(--shadow); border: 1px solid var(--border-color); width: 200px; padding: 0.5rem; z-index: 20; display: flex; flex-direction: column; }
.profile-dropdown button { display: flex; align-items: center; gap: 0.75rem; width: 100%; padding: 0.75rem; border: none; background: none; cursor: pointer; text-align: left; border-radius: 6px; color: var(--text-primary); }
.profile-dropdown button:hover { background-color: var(--bg-primary); }
.profile-dropdown button .material-symbols-outlined { color: var(--text-secondary); }

/* Reports Page */
.kpi-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1.5rem; margin-bottom: 1.5rem; }
.kpi-card { grid-column: span 12 / span 12; background-color: var(--bg-secondary); border-radius: 8px; padding: 1.5rem; box-shadow: var(--shadow); }
@media (min-width: 768px) { .kpi-card.kpi-span-4 { grid-column: span 3 / span 3; } }
.kpi-card h4 { font-size: 0.875rem; color: var(--text-secondary); font-weight: 500; margin-bottom: 0.5rem; }
.kpi-card p { font-size: 2rem; font-weight: 700; }
.kpi-card.positive p { color: var(--success); }
.kpi-card.negative p { color: var(--danger); }
.date-range-filter { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin-bottom: 1.5rem; background-color: var(--bg-secondary); padding: 1rem; border-radius: 8px; }
.custom-date-inputs { display: flex; align-items: center; gap: 0.5rem; }
.reports-dashboard-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1.5rem; }
.report-widget { grid-column: span 12 / span 12; }
@media (min-width: 768px) { .widget-md-6 { grid-column: span 6 / span 6; } .widget-md-12 { grid-column: span 12 / span 12; } }
@media (min-width: 1024px) { .widget-lg-5 { grid-column: span 5 / span 5; } .widget-lg-6 { grid-column: span 6 / span 6; } .widget-lg-7 { grid-column: span 7 / span 7; } }
.report-widget-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; border-bottom: 1px solid var(--border-color); }
.report-widget-header h3 { font-size: 1.1rem; font-weight: 600; }
.report-widget-content { padding: 1.5rem; height: 300px; overflow-y: auto; }
.no-data-message { color: var(--text-secondary); text-align: center; padding: 2rem; }
.sales-chart-container { height: 100%; width: 100%; }
.chart-bars { display: flex; height: 100%; gap: 1rem; align-items: flex-end; }
.chart-bar-item { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; }
.chart-bar { width: 100%; background-color: var(--accent-primary); border-radius: 4px 4px 0 0; transition: height 0.5s ease-out; }
.chart-bar-value { font-size: 0.75rem; font-weight: 500; margin-bottom: 0.25rem; white-space: nowrap; }
.chart-bar-label { font-size: 0.75rem; color: var(--text-secondary); margin-top: 0.5rem; }

.top-products-chart-container { display: flex; flex-direction: column; gap: 1rem; }
.product-bar-item { display: grid; grid-template-columns: 120px 1fr 50px; align-items: center; gap: 0.75rem; font-size: 0.875rem; }
.product-bar-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.product-bar-bg { background-color: var(--bg-primary); border-radius: 999px; height: 1.25rem; }
.product-bar-fill { background-color: var(--accent-primary); height: 100%; border-radius: 999px; transition: width 0.5s ease-out; }
.product-bar-value { text-align: right; font-weight: 500; }
.cash-flow-content { display: flex; flex-direction: column; gap: 1.5rem; justify-content: center; height: 100%; }
.cash-flow-item { display: flex; justify-content: space-between; align-items: center; font-size: 1.1rem; }
.cash-flow-item.total { border-top: 2px solid var(--border-color); padding-top: 1rem; font-weight: 700; }
.cash-flow-item strong { font-size: 1.25rem; }
.cash-flow-item .positive { color: var(--success); }
.cash-flow-item .negative { color: var(--danger); }
.report-table { font-size: 0.875rem; }
.report-table th, .report-table td { padding: 0.5rem; }

/* Category Management */
.category-list { list-style: none; max-height: 250px; overflow-y: auto; border: 1px solid var(--border-color); border-radius: 6px; padding: 0.5rem; }
.category-item { display: flex; justify-content: space-between; align-items: center; padding: 0.5rem; border-radius: 4px; }
.category-item:hover { background-color: var(--bg-primary); }
.category-item-main { display: flex; align-items: center; gap: 0.5rem; }
.add-category-form { display: flex; gap: 0.5rem; }
.category-edit-input { flex-grow: 1; }

/* RESPONSIVE */
@media (max-width: 768px) {
  /* Fix: mobile sidebar uses transform with an explicit open class to avoid the previous container-class mismatch */
  .sidebar { position: fixed; inset: 0 auto 0 0; transform: translateX(-100%); width: 260px; z-index: 20; }
  .sidebar.is-open { transform: translateX(0); }
  /* Backdrop helper if you add an overlay */
  .sidebar-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 15; }

  .header { padding: 1rem; }
  .main-content { padding: 1rem; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .page-controls, .filter-bar { flex-direction: column; align-items: stretch; }
  .card { overflow-x: auto; }
  table { min-width: 700px; }
}

/* Custom Scrollbar (WebKit) */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* High-contrast/forced-colors support */
@media (forced-colors: active) {
  .button, .button-secondary, .button-danger, .icon-button, input, select, textarea { forced-color-adjust: none; }
}