/* Mobile POS - Professional Design */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: rgba(37, 99, 235, 0.1);
  --accent: #0d9488;
  --sidebar-bg: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-text-hover: #f1f5f9;
  --sidebar-active: #2563eb;
  --sidebar-active-bg: rgba(37, 99, 235, 0.15);
  --card-shadow: 0 2px 8px rgba(0,0,0,.06);
  --card-shadow-hover: 0 4px 16px rgba(0,0,0,.08);
  --border: #e2e8f0;
  --bg-page: #f8fafc;
  --bg-card-header: #f8fafc;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
  --text: #1e293b;
  --text-muted: #64748b;
  --radius: 8px;
  --radius-sm: 6px;
}

* { box-sizing: border-box; }
html { background: var(--bg-page); }
body, .app-body { margin: 0; font-family: 'Inter', 'Segoe UI', system-ui, sans-serif; background: var(--bg-page) !important; color: var(--text) !important; font-size: 15px; line-height: 1.5; -webkit-font-smoothing: antialiased; }

.app-wrap { display: flex; min-height: 100vh; position: relative; }

/* Sidebar */
.sidebar {
  width: 260px; background: var(--sidebar-bg); color: var(--sidebar-text);
  flex-shrink: 0; padding: 0; display: flex; flex-direction: column;
  transition: transform .25s ease, box-shadow .25s ease;
}
@media (max-width: 991px) {
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0; z-index: 1000;
    width: 280px; max-width: 85vw;
    transform: translateX(-100%);
    box-shadow: none;
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 20px rgba(0,0,0,.2);
  }
  .sidebar-overlay {
    display: none;
    position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 999;
  }
  .sidebar-overlay.open { display: block; }
  .main { width: 100%; }
  .topbar-menu-btn {
    display: inline-flex !important;
    align-items: center; justify-content: center;
    width: 40px; height: 40px; padding: 0;
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: #fff; color: var(--text); cursor: pointer;
  }
  .topbar-title { font-size: 1rem; }
  .topbar-right { gap: 0.5rem; }
  .topbar-date { display: none; }
}
@media (min-width: 992px) {
  .topbar-menu-btn { display: none !important; }
  .sidebar-overlay { display: none !important; }
}
.topbar-menu-btn { display: none; }
.sidebar-brand { padding: 1.25rem 1.25rem 1rem; border-bottom: 1px solid rgba(255,255,255,.08); }
.sidebar-brand-name { display: block; font-size: 1.2rem; font-weight: 800; color: #fff; letter-spacing: -0.02em; }
.sidebar-brand-tagline { display: block; font-size: 0.7rem; color: var(--sidebar-text); margin-top: 2px; letter-spacing: 0.02em; text-transform: uppercase; }
.sidebar-nav { padding: 0.75rem 0; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px; padding: 0.65rem 1.25rem; color: var(--sidebar-text);
  text-decoration: none; transition: background .2s, color .2s; font-size: 0.9rem; font-weight: 500;
}
.sidebar-nav a i { font-size: 1.15rem; width: 22px; text-align: center; opacity: .9; }
.sidebar-nav a:hover { background: rgba(255,255,255,.06); color: var(--sidebar-text-hover); }
.sidebar-nav a.active { background: var(--sidebar-active-bg); color: #fff; border-left: 3px solid var(--sidebar-active); }
.sidebar-nav a.active i { opacity: 1; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  background: #fff; padding: 0.875rem 1.5rem; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.topbar-title { margin: 0; font-size: 1.25rem; font-weight: 700; color: var(--text); letter-spacing: -0.02em; }
.topbar-right { display: flex; align-items: center; gap: 1rem; }
.topbar-date { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.topbar-date i { margin-right: 4px; opacity: .8; }
.content { padding: 2rem; flex: 1; }
@media (max-width: 768px) {
  .content { padding: 1rem; }
  .page-header { flex-direction: column; align-items: stretch; gap: 0.75rem; }
  .page-header .btn { width: 100%; justify-content: center; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .filter-bar .form-control { max-width: none; }
  .form-actions { flex-wrap: wrap; }
  .form-actions .btn { flex: 1; min-width: 120px; }
  .stats-row { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .stat-card .value { font-size: 1.25rem; }
  .stock-stats-row { gap: 0.75rem; }
  .stock-stat { min-width: 100px; padding: 0.75rem 1rem; }
  .table { font-size: 0.8rem; }
  .table th, .table td { padding: 8px 10px; }
  .btn-sm { padding: 0.3rem 0.5rem; font-size: 0.75rem; }
}

/* Cards */
.card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--card-shadow);
  border: 1px solid var(--border); margin-bottom: 1.5rem; transition: box-shadow .2s;
}
.card:hover { box-shadow: var(--card-shadow-hover); }
.card-header { padding: 1rem 1.25rem; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 1rem; color: var(--text); background: var(--bg-card-header); border-radius: var(--radius) var(--radius) 0 0; }
.card-body { padding: 1.25rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 0.5rem 1rem; border-radius: var(--radius); font-size: 0.9rem; font-weight: 600;
  border: none; cursor: pointer; text-decoration: none; transition: background .2s, transform .15s, box-shadow .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 2px 6px rgba(37,99,235,.3); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; box-shadow: 0 4px 12px rgba(37,99,235,.35); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline-secondary { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline-secondary:hover { background: #f1f5f9; border-color: #cbd5e1; }
.btn-outline-primary { background: transparent; border: 1px solid var(--primary); color: var(--primary); }
.btn-outline-primary:hover { background: var(--primary-light); color: var(--primary-dark); }
.btn-outline-danger { background: transparent; border: 1px solid var(--danger); color: var(--danger); }
.btn-outline-danger:hover { background: rgba(220,38,38,.08); color: var(--danger); }
.btn-sm { padding: 0.35rem 0.65rem; font-size: 0.8rem; }
.btn-sm:hover { transform: none; }

/* Table */
.table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.table th, .table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); }
.table th { background: var(--bg-card-header); font-weight: 700; font-size: 0.8rem; color: var(--text); text-transform: uppercase; letter-spacing: 0.04em; border-bottom: 2px solid var(--border); }
.table tbody tr { transition: background .15s; }
.table tbody tr:hover { background: #fafafa; }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.4rem; font-weight: 600; font-size: 0.875rem; color: var(--text); }
.form-control {
  width: 100%; padding: 0.55rem 0.85rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 0.95rem; font-family: inherit; transition: border-color .2s, box-shadow .2s;
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }
.form-control[readonly], .unit-price-input { background: #f1f5f9; cursor: not-allowed; }

.form-section { margin-bottom: 1.75rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--border); }
.form-section:last-of-type { border-bottom: none; }
.form-section-title { margin: 0 0 .75rem 0; font-size: 1rem; font-weight: 700; color: var(--text); }
.ms-2 { margin-left: 0.5rem; }
.w-100 { width: 100%; }
.form-section-fields { display: flex; flex-wrap: wrap; gap: 1rem; }
.form-section-fields .form-group { min-width: 180px; flex: 1; }
.spec-row { margin-bottom: 1.25rem; padding: 1rem; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; }
.spec-row .spec-row-header { margin-bottom: .5rem; }
.spec-row .form-section-fields { margin-top: 0; }
.form-hint { display: block; margin-top: .25rem; font-size: .8rem; color: #6c757d; }
.form-actions { margin-top: 1.25rem; padding-top: 1rem; border-top: 1px solid var(--border); display: flex; gap: .5rem; }

/* Page polish */
.page-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.5rem; }
.page-header .btn { display: inline-flex; align-items: center; gap: 6px; }
.empty-state { padding: 2.5rem 1rem !important; text-align: center; color: var(--text-muted); font-size: 0.95rem; }
.empty-state a { color: var(--primary); font-weight: 600; text-decoration: none; }
.empty-state a:hover { text-decoration: underline; }
.filter-bar { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.filter-bar .form-control { max-width: 100%; }
.filter-bar label { font-size: 0.875rem; font-weight: 500; color: var(--text); margin-bottom: 0; }

.alert { padding: 1rem 1.25rem; border-radius: var(--radius); margin-bottom: 1.25rem; font-weight: 500; border: 1px solid transparent; }
.alert-success { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
.alert-danger { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.alert-warning { background: #fffbeb; color: #92400e; border-color: #fde68a; }

.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }
.gap-2 { gap: .5rem; }
.text-end { text-align: right; }
.text-center { text-align: center; }
.gap-3 { gap: 1rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: .25rem; }
.mb-2 { margin-bottom: .5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mt-3 { margin-top: 1rem; }
.p-3 { padding: 1rem; }
.d-block { display: block; }
.small { font-size: 0.875rem; }
/* View Purchase page */
.purchase-view-info .row-info { display: flex; flex-wrap: wrap; gap: 1.5rem 2rem; }
.purchase-view-info .row-info-item { display: flex; flex-direction: column; gap: .15rem; }
.purchase-view-info .row-info-item .label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: .03em; color: var(--text-muted, #666); }
.purchase-view-info .row-info-item .value { font-weight: 600; font-size: 1rem; }
.purchase-view-info .supplier-box,
.purchase-view-info .notes-box { padding: .75rem 1rem; background: var(--bg, #f8f9fa); border-radius: 8px; border: 1px solid var(--border, #e9ecef); }
.purchase-view-total { text-align: right; font-size: 1.1rem; padding: .75rem 0; border-top: 2px solid var(--border, #dee2e6); margin-top: .5rem; }
/* Stock page */
.stock-stats-row { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.stock-stat { display: flex; flex-direction: column; gap: 0.25rem; padding: 1rem 1.25rem; background: var(--bg-card-header); border-radius: var(--radius-sm); border: 1px solid var(--border); min-width: 120px; }
.stock-stat-value { font-size: 1.5rem; font-weight: 800; line-height: 1.2; color: var(--text); }
.stock-stat-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; font-weight: 600; }
.pos-cart .cart-summary { background: var(--bg-card-header); }
.overflow-x-auto { overflow-x: auto; }
.fw-bold { font-weight: 600; }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.table-warning { background: #fffbeb; }
.table-danger { background: #fef2f2; }
.text-muted { color: var(--text-muted); }
.text-end { text-align: right; }
.badge { display: inline-block; padding: .2rem .5rem; font-size: .75rem; border-radius: 4px; }
.badge-success { background: #d1fae5; color: #065f46; font-weight: 600; }
.badge-warning { background: #fef3c7; color: #92400e; font-weight: 600; }
.badge-danger { background: #fee2e2; color: #991b1b; font-weight: 600; }

/* Dashboard stats */
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.25rem; }
.stat-card {
  background: #fff; border-radius: var(--radius); padding: 1.35rem; box-shadow: var(--card-shadow);
  border: 1px solid var(--border); transition: box-shadow .2s, transform .15s;
}
.stat-card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-2px); }
.stat-card .stat-icon { width: 40px; height: 40px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.25rem; margin-bottom: 0.75rem; }
.stat-card .stat-icon.primary { background: var(--primary-light); color: var(--primary); }
.stat-card .stat-icon.success { background: rgba(5,150,105,.12); color: var(--success); }
.stat-card .stat-icon.warning { background: rgba(217,119,6,.12); color: var(--warning); }
.stat-card .stat-icon.danger { background: rgba(220,38,38,.1); color: var(--danger); }
.stat-card .value { font-size: 1.5rem; font-weight: 800; color: var(--text); letter-spacing: -0.02em; }
.stat-card .label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; font-weight: 500; }

/* POS specific */
.pos-layout { display: grid; grid-template-columns: 1fr 380px; gap: 1.5rem; min-height: calc(100vh - 120px); }
@media (max-width: 992px) { .pos-layout { grid-template-columns: 1fr; } }
.pos-products { overflow: auto; }
.pos-cart { background: #fff; border-radius: 8px; box-shadow: var(--card-shadow); border: 1px solid var(--border); display: flex; flex-direction: column; }
.pos-cart .cart-header { padding: 1rem; border-bottom: 1px solid var(--border); font-weight: 600; }
.pos-cart .cart-items { flex: 1; overflow: auto; padding: 1rem; max-height: 400px; }
.pos-cart .cart-footer { padding: 1rem; border-top: 2px solid var(--border); }
.cart-row { display: flex; justify-content: space-between; align-items: center; padding: .5rem 0; border-bottom: 1px solid #eee; }
.cart-row .qty-control { display: flex; align-items: center; gap: .35rem; }
.cart-row .qty-control input { width: 42px; text-align: center; }
.product-tile {
  background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 1rem;
  cursor: pointer; transition: box-shadow .15s, border-color .15s; text-align: center;
}
.product-tile:hover { border-color: var(--primary); box-shadow: 0 4px 12px rgba(37,99,235,.2); }
.product-tile .name { font-weight: 600; margin-bottom: .25rem; }
.product-tile .price { color: var(--primary); font-weight: 600; }
.product-tile .stock { font-size: .8rem; color: #6c757d; }
.product-tile .product-tile-meta { font-size: .8rem; }
.product-tile .product-tile-sku { font-size: .75rem; color: #6c757d; margin-top: .15rem; }
.pos-scan-card .form-control-lg { font-size: 1rem; }
.pos-cart .cart-summary { background: #f8f9fa; padding: .75rem; border-radius: 8px; margin-bottom: .75rem; }
.pos-cart .cart-total-row { font-size: 1.1rem; }
.pos-cart .cart-count { font-size: 0.75rem; }
.cart-row .cart-item-name { font-weight: 500; }
.cart-row .cart-line-total { font-weight: 600; min-width: 4rem; text-align: right; }
.flex-grow-1 { flex-grow: 1; }
.badge.bg-primary { background: var(--primary); color: #fff; padding: .25rem .5rem; border-radius: 6px; }
.pos-toast { position: fixed; bottom: 20px; right: 20px; padding: 12px 20px; color: #fff; border-radius: 8px; display: none; box-shadow: 0 4px 12px rgba(0,0,0,.15); z-index: 9999; max-width: 90vw; }
.pos-toast-success { background: #198754; }
.pos-toast-error { background: #dc3545; }
.pos-cart-body { padding: 0 1rem; }
.pos-customer-wrap { padding-top: .5rem; }
.pos-add-customer { padding: .6rem; background: #f8f9fa; border-radius: 6px; border: 1px solid var(--border); }
.pos-add-customer .form-control-sm { font-size: 0.8rem; }
.cart-item-variant { font-size: 0.75rem; margin-top: .1rem; }
.pos-modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; padding: 1rem; }
.pos-modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.4); }
.pos-modal-box { position: relative; background: #fff; border-radius: 10px; box-shadow: 0 10px 40px rgba(0,0,0,.2); padding: 1.25rem; min-width: 280px; max-width: 90vw; }
.pos-modal-title { font-weight: 600; margin-bottom: .75rem; }
.pos-variant-list { display: flex; flex-direction: column; gap: .5rem; }
.pos-variant-btn { display: block; width: 100%; text-align: left; padding: .6rem .75rem; border: 1px solid var(--border); border-radius: 6px; background: #fff; cursor: pointer; font-size: 0.9rem; }
.pos-variant-btn:hover { border-color: var(--primary); background: #f0f7ff; }
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: .75rem; }
@media (max-width: 576px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); gap: .5rem; }
  .product-tile { padding: .75rem; }
  .product-tile .name { font-size: .85rem; }
  .pos-cart .cart-items { max-height: 280px; }
  .pos-modal-box { margin: 1rem; width: calc(100% - 2rem); }
}


/* Search bar */
.search-bar { max-width: 400px; }
.search-bar .form-control { padding-left: 2.25rem; }
.search-wrap { position: relative; }
.search-wrap::before { content: '🔍'; position: absolute; left: .75rem; top: 50%; transform: translateY(-50%); font-size: 1rem; }