/* ============================================
   POS ANGOLA - DESIGN SYSTEM
   Aesthetic: Clean utilitarian with warm accents
   ============================================ */

:root {
    /* Colors */
    --bg-primary: #0f1117;
    --bg-secondary: #161922;
    --bg-tertiary: #1c1f2e;
    --bg-card: #1a1d2b;
    --bg-hover: #22263a;
    --bg-input: #1e2235;
    --border: #2a2e42;
    --border-light: #353952;

    --text-primary: #e8eaf0;
    --text-secondary: #8b8fa7;
    --text-muted: #5e6280;
    --text-white: #ffffff;

    --accent: #f59e0b;
    --accent-hover: #d97706;
    --accent-light: rgba(245, 158, 11, 0.1);
    --accent-glow: rgba(245, 158, 11, 0.15);

    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);

    /* Spacing */
    --sidebar-width: 260px;
    --sidebar-collapsed: 72px;
    --topbar-height: 64px;
    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 16px;

    /* Transitions */
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 14px; }
body {
    font-family: 'DM Sans', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

.hidden { display: none !important; }

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ============================================
   LOADING SCREEN
   ============================================ */
.loading-screen {
    position: fixed; inset: 0; z-index: 9999;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-primary);
}
.loading-spinner { text-align: center; }
.spinner-ring {
    width: 48px; height: 48px; margin: 0 auto 16px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-spinner p { color: var(--text-secondary); font-size: 0.9rem; }

/* ============================================
   LOGIN SCREEN
   ============================================ */
.login-screen {
    position: fixed; inset: 0; z-index: 9998;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-primary);
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(245,158,11,0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(59,130,246,0.04) 0%, transparent 50%);
}
.login-container {
    width: 100%; max-width: 400px; padding: 40px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}
.login-brand { text-align: center; margin-bottom: 32px; }
.brand-icon {
    width: 64px; height: 64px; margin: 0 auto 16px;
    background: var(--accent-light); border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    font-size: 28px; color: var(--accent);
}
.login-brand h1 { font-size: 1.5rem; font-weight: 700; color: var(--text-white); }
.login-brand p { color: var(--text-secondary); font-size: 0.85rem; margin-top: 4px; }
.login-footer { text-align: center; margin-top: 24px; }
.login-footer p { font-size: 0.7rem; color: var(--text-muted); }

/* ============================================
   FORMS
   ============================================ */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block; font-size: 0.8rem; font-weight: 500;
    color: var(--text-secondary); margin-bottom: 6px; text-transform: uppercase;
    letter-spacing: 0.5px;
}
.input-icon {
    position: relative; display: flex; align-items: center;
}
.input-icon i {
    position: absolute; left: 12px;
    color: var(--text-muted); font-size: 1.1rem; pointer-events: none;
}
.input-icon input { padding-left: 40px; }
.toggle-password {
    position: absolute; right: 8px; background: none; border: none;
    color: var(--text-muted); cursor: pointer; padding: 4px;
}

input, select, textarea {
    width: 100%; padding: 10px 14px;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary);
    font-family: inherit; font-size: 0.9rem;
    transition: border-color var(--transition);
    outline: none;
}
input:focus, select:focus, textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
input::placeholder { color: var(--text-muted); }
select { cursor: pointer; }
textarea { resize: vertical; min-height: 80px; }

.form-row { display: grid; gap: 12px; grid-template-columns: 1fr 1fr; }
.form-row.three { grid-template-columns: 1fr 1fr 1fr; }
.form-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 10px 20px; border: none; border-radius: var(--radius-sm);
    font-family: inherit; font-size: 0.85rem; font-weight: 600;
    cursor: pointer; transition: all var(--transition);
    white-space: nowrap; text-decoration: none;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); transform: translateY(-1px); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover:not(:disabled) { background: var(--bg-hover); border-color: var(--border-light); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover:not(:disabled) { background: #dc2626; }
.btn-success { background: var(--success); color: white; }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-hover); }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-full { width: 100%; }
.btn-icon {
    background: none; border: none; color: var(--text-secondary);
    cursor: pointer; padding: 8px; border-radius: var(--radius-sm);
    transition: all var(--transition); display: flex; align-items: center;
    font-size: 1.1rem;
}
.btn-icon:hover { color: var(--text-primary); background: var(--bg-hover); }

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: 12px 16px; border-radius: var(--radius-sm);
    font-size: 0.85rem; margin-top: 12px;
}
.alert-error { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(239,68,68,0.2); }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(16,185,129,0.2); }
.alert-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid rgba(245,158,11,0.2); }
.alert-info { background: var(--info-bg); color: var(--info); border: 1px solid rgba(59,130,246,0.2); }

/* ============================================
   APP LAYOUT
   ============================================ */
.app-container { display: flex; height: 100vh; }

/* SIDEBAR */
.sidebar {
    width: var(--sidebar-width); height: 100vh;
    background: var(--bg-secondary); border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    transition: width var(--transition-slow);
    flex-shrink: 0; overflow: hidden; z-index: 100;
}
.sidebar.collapsed { width: var(--sidebar-collapsed); }
.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-link span,
.sidebar.collapsed .nav-section-label,
.sidebar.collapsed .nav-badge,
.sidebar.collapsed .user-details { display: none; }

.sidebar-header {
    display: flex; align-items: center; gap: 12px;
    padding: 16px 20px; height: var(--topbar-height);
    border-bottom: 1px solid var(--border);
}
.brand-icon-sm {
    width: 36px; height: 36px; min-width: 36px;
    background: var(--accent-light); border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; color: var(--accent);
}
.brand-text { font-size: 1.1rem; font-weight: 700; color: var(--text-white); white-space: nowrap; }
.sidebar-toggle {
    margin-left: auto; background: none; border: none;
    color: var(--text-muted); cursor: pointer; font-size: 1.1rem;
    padding: 4px; border-radius: var(--radius-sm);
}
.sidebar-toggle:hover { color: var(--text-primary); }

.sidebar-nav {
    flex: 1; overflow-y: auto; padding: 12px 8px;
}
.nav-section { margin-bottom: 8px; }
.nav-section-label {
    display: block; font-size: 0.65rem; font-weight: 600;
    color: var(--text-muted); padding: 8px 12px 4px;
    letter-spacing: 1px; text-transform: uppercase;
}
.nav-link {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 12px; border-radius: var(--radius-sm);
    color: var(--text-secondary); text-decoration: none;
    font-size: 0.9rem; font-weight: 500;
    transition: all var(--transition); position: relative;
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-hover); }
.nav-link.active {
    color: var(--accent); background: var(--accent-light);
}
.nav-link i { font-size: 1.2rem; width: 20px; text-align: center; flex-shrink: 0; }
.nav-badge {
    margin-left: auto; background: var(--accent);
    color: #000; font-size: 0.7rem; font-weight: 700;
    padding: 2px 7px; border-radius: 10px; min-width: 20px;
    text-align: center;
}
.nav-badge.alert-badge { background: var(--danger); color: white; }
.nav-badge:empty { display: none; }

.sidebar-footer { border-top: 1px solid var(--border); padding: 12px; }
.user-info { display: flex; align-items: center; gap: 10px; }
.user-avatar {
    width: 36px; height: 36px; min-width: 36px;
    background: var(--bg-tertiary); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-secondary); font-size: 1rem;
}
.user-details { overflow: hidden; }
.user-name { display: block; font-size: 0.85rem; font-weight: 600; color: var(--text-primary); white-space: nowrap; text-overflow: ellipsis; overflow: hidden; max-width: 120px; }
.user-role { display: block; font-size: 0.7rem; color: var(--text-muted); }

/* MAIN CONTENT */
.main-content { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.topbar {
    height: var(--topbar-height); min-height: var(--topbar-height);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px; border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}
.topbar-left { display: flex; align-items: center; gap: 16px; }
.topbar-left h2 { font-size: 1.15rem; font-weight: 600; }
.sidebar-toggle-mobile { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.3rem; cursor: pointer; }

.topbar-right { display: flex; align-items: center; gap: 16px; }
.topbar-search {
    position: relative; display: flex; align-items: center;
}
.topbar-search i { position: absolute; left: 10px; color: var(--text-muted); }
.topbar-search input {
    width: 240px; padding: 8px 14px 8px 34px;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); font-size: 0.85rem;
}
.notification-btn { position: relative; }
.notification-dot {
    position: absolute; top: 4px; right: 4px;
    width: 8px; height: 8px; background: var(--danger);
    border-radius: 50%; display: none;
}
.notification-dot.visible { display: block; }
.company-info { font-size: 0.8rem; color: var(--text-secondary); }

.page-content {
    flex: 1; overflow-y: auto; padding: 24px;
}

/* ============================================
   CARDS & WIDGETS
   ============================================ */
.card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px;
    transition: border-color var(--transition);
}
.card:hover { border-color: var(--border-light); }
.card-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 16px;
}
.card-header h3 { font-size: 0.95rem; font-weight: 600; }
.card-grid { display: grid; gap: 16px; }
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.stat-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px;
    display: flex; flex-direction: column; gap: 8px;
    transition: all var(--transition);
}
.stat-card:hover { border-color: var(--accent); 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: 1.2rem;
}
.stat-card .stat-icon.green { background: var(--success-bg); color: var(--success); }
.stat-card .stat-icon.amber { background: var(--warning-bg); color: var(--warning); }
.stat-card .stat-icon.red { background: var(--danger-bg); color: var(--danger); }
.stat-card .stat-icon.blue { background: var(--info-bg); color: var(--info); }
.stat-card .stat-value { font-size: 1.6rem; font-weight: 700; color: var(--text-white); }
.stat-card .stat-label { font-size: 0.8rem; color: var(--text-secondary); }

/* ============================================
   TABLE
   ============================================ */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
thead th {
    text-align: left; padding: 12px 16px;
    font-size: 0.75rem; font-weight: 600;
    color: var(--text-muted); text-transform: uppercase;
    letter-spacing: 0.5px; border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
tbody td {
    padding: 12px 16px; border-bottom: 1px solid var(--border);
    font-size: 0.85rem; color: var(--text-secondary);
    vertical-align: middle;
}
tbody tr { transition: background var(--transition); }
tbody tr:hover { background: var(--bg-hover); }
tbody tr:last-child td { border-bottom: none; }

.table-actions { display: flex; gap: 4px; }

/* ============================================
   BADGES & TAGS
   ============================================ */
.badge {
    display: inline-flex; align-items: center; padding: 3px 10px;
    border-radius: 20px; font-size: 0.72rem; font-weight: 600;
    letter-spacing: 0.3px;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-neutral { background: var(--bg-tertiary); color: var(--text-secondary); }

/* ============================================
   PAGINATION
   ============================================ */
.pagination {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 0; font-size: 0.85rem;
}
.pagination-info { color: var(--text-muted); }
.pagination-controls { display: flex; gap: 4px; }
.pagination-controls button {
    padding: 6px 12px; background: var(--bg-tertiary);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-secondary); cursor: pointer;
    font-size: 0.8rem; transition: all var(--transition);
}
.pagination-controls button:hover:not(:disabled) { background: var(--bg-hover); color: var(--text-primary); }
.pagination-controls button.active { background: var(--accent); color: #000; border-color: var(--accent); }
.pagination-controls button:disabled { opacity: 0.4; cursor: not-allowed; }

/* ============================================
   MODAL
   ============================================ */
.modal-overlay {
    position: fixed; inset: 0; z-index: 1000;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
    animation: fadeIn 0.15s ease;
}
.modal {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); width: 90%; max-width: 580px;
    max-height: 85vh; display: flex; flex-direction: column;
    animation: slideUp 0.2s ease;
}
.modal.modal-lg { max-width: 800px; }
.modal.modal-xl { max-width: 1100px; }
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 24px; border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 1.05rem; font-weight: 600; }
.modal-body { padding: 24px; overflow-y: auto; flex: 1; }
.modal-footer {
    display: flex; align-items: center; justify-content: flex-end; gap: 8px;
    padding: 16px 24px; border-top: 1px solid var(--border);
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ============================================
   CONFIRM DIALOG
   ============================================ */
.confirm-overlay {
    position: fixed; inset: 0; z-index: 2000;
    background: rgba(0,0,0,0.7); backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center;
}
.confirm-dialog {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 32px; text-align: center;
    max-width: 380px; width: 90%; animation: slideUp 0.2s ease;
}
.confirm-icon { font-size: 2.5rem; margin-bottom: 16px; color: var(--warning); }
.confirm-dialog h3 { font-size: 1.1rem; margin-bottom: 8px; }
.confirm-dialog p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 24px; }
.confirm-actions { display: flex; gap: 8px; justify-content: center; }

/* ============================================
   TOAST
   ============================================ */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 3000; display: flex; flex-direction: column; gap: 8px; }
.toast {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 20px; border-radius: var(--radius);
    background: var(--bg-card); border: 1px solid var(--border);
    min-width: 300px; max-width: 420px;
    animation: slideIn 0.3s ease;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.toast i { font-size: 1.2rem; flex-shrink: 0; }
.toast-success i { color: var(--success); }
.toast-error i { color: var(--danger); }
.toast-warning i { color: var(--warning); }
.toast-info i { color: var(--info); }
.toast-message { flex: 1; font-size: 0.85rem; }
.toast-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1rem; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ============================================
   POS SCREEN - Grid layout matching reference
   ============================================ */
.pos-layout {
    display: grid; grid-template-columns: 1fr 380px;
    gap: 0; height: calc(100vh - var(--topbar-height));
    margin: -24px; overflow: hidden;
}

/* --- LEFT: Products Panel --- */
.pos-products {
    display: flex; flex-direction: column; overflow: hidden;
    background: var(--bg-primary);
}

/* Top row: category tabs + search */
.pos-topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 20px; border-bottom: 1px solid var(--border);
    gap: 12px; flex-shrink: 0;
}
.pos-categories {
    display: flex; gap: 6px; overflow-x: auto; flex: 1;
    scrollbar-width: none;
}
.pos-categories::-webkit-scrollbar { display: none; }
.pos-cat-btn {
    padding: 7px 16px; border-radius: 20px;
    background: var(--bg-tertiary); border: 1px solid var(--border);
    color: var(--text-secondary); font-size: 0.78rem; font-weight: 500;
    cursor: pointer; white-space: nowrap; transition: all var(--transition);
    display: inline-flex; align-items: center; gap: 6px;
}
.pos-cat-btn:hover { border-color: var(--border-light); color: var(--text-primary); }
.pos-cat-btn.active {
    background: var(--accent); border-color: var(--accent);
    color: #000; font-weight: 600;
}
.pos-cat-btn .cat-count {
    background: rgba(255,255,255,0.2); padding: 1px 7px;
    border-radius: 10px; font-size: 0.7rem; font-weight: 700;
}
.pos-cat-btn.active .cat-count { background: rgba(0,0,0,0.15); }

.pos-topbar-actions {
    display: flex; align-items: center; gap: 8px; flex-shrink: 0;
}
.pos-topbar-actions .pos-search-box {
    position: relative; width: 200px;
}
.pos-topbar-actions .pos-search-box i {
    position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
    color: var(--text-muted); font-size: 0.9rem;
}
.pos-topbar-actions .pos-search-box input {
    width: 100%; padding: 7px 12px 7px 32px;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary);
    font-size: 0.8rem;
}
.pos-topbar-actions .pos-search-box input:focus {
    outline: none; border-color: var(--accent);
}
.pos-refresh-btn {
    padding: 7px 14px; border-radius: var(--radius-sm);
    background: var(--bg-tertiary); border: 1px solid var(--border);
    color: var(--text-secondary); font-size: 0.8rem; cursor: pointer;
    display: flex; align-items: center; gap: 6px;
    transition: all var(--transition);
}
.pos-refresh-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Product grid */
.pos-product-grid {
    flex: 1; overflow-y: auto; padding: 16px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px; align-content: start;
}

/* Product card */
.pos-product-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden;
    transition: all var(--transition); position: relative;
    display: flex; flex-direction: column;
}
.pos-product-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.2); }

.pos-product-card .product-img {
    width: 100%; aspect-ratio: 4/3;
    background: var(--bg-input); overflow: hidden; position: relative;
}
.pos-product-card .product-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.3s ease; }
.pos-product-card:hover .product-img img { transform: scale(1.05); }
.pos-product-card .product-img .no-img {
    width: 100%; height: 100%; display: flex; align-items: center;
    justify-content: center; font-size: 2.5rem; color: var(--text-muted);
}

/* Availability badge on image */
.pos-product-card .stock-badge {
    position: absolute; top: 8px; left: 8px;
    padding: 3px 10px; border-radius: 6px;
    font-size: 0.65rem; font-weight: 700; letter-spacing: 0.3px;
}
.stock-badge.available { background: rgba(16,185,129,0.9); color: #fff; }
.stock-badge.unavailable { background: rgba(239,68,68,0.9); color: #fff; }

/* Card body */
.pos-product-card .product-body {
    padding: 10px 12px; display: flex; flex-direction: column; gap: 2px; flex: 1;
}
.pos-product-card .product-name {
    font-size: 0.82rem; font-weight: 500; color: var(--text-primary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.pos-product-card .product-price {
    font-size: 0.9rem; font-weight: 700; color: var(--text-white);
    font-family: 'JetBrains Mono', monospace;
}

/* Add to cart button */
.pos-product-card .product-add-btn {
    display: flex; align-items: center; justify-content: center; gap: 6px;
    padding: 8px 12px; margin: 0 12px 12px;
    background: var(--accent); border: none; border-radius: var(--radius-sm);
    color: #000; font-size: 0.78rem; font-weight: 600; cursor: pointer;
    transition: all var(--transition);
}
.pos-product-card .product-add-btn:hover { background: var(--accent-hover); }
.pos-product-card .product-add-btn.in-cart {
    background: var(--success); color: #fff;
}
.pos-product-card.out-of-stock { opacity: 0.5; }
.pos-product-card.out-of-stock .product-add-btn {
    background: var(--bg-tertiary); color: var(--text-muted); cursor: not-allowed;
    pointer-events: none;
}

/* --- RIGHT: Cart / Order Summary Panel --- */
.pos-cart {
    display: flex; flex-direction: column; background: var(--bg-secondary);
    border-left: 1px solid var(--border); overflow: hidden;
}
.pos-cart-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.pos-cart-header h3 { font-size: 1rem; font-weight: 700; color: var(--text-white); }
.pos-cart-header .order-number {
    font-size: 0.78rem; color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

/* Cart customer select */
.pos-cart-customer {
    padding: 10px 20px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.pos-cart-customer select {
    width: 100%; padding: 8px 12px; font-size: 0.82rem;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary);
}

/* Cart items list */
.pos-cart-items {
    flex: 1; overflow-y: auto; padding: 4px 0;
}
.cart-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 20px; border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}
.cart-item:hover { background: var(--bg-hover); }
.cart-item:last-child { border-bottom: none; }

.cart-item-thumb {
    width: 44px; height: 44px; border-radius: 8px;
    background: var(--bg-input); overflow: hidden; flex-shrink: 0;
}
.cart-item-thumb img { width: 100%; height: 100%; object-fit: cover; }
.cart-item-thumb .no-thumb {
    width: 100%; height: 100%; display: flex; align-items: center;
    justify-content: center; font-size: 1.2rem; color: var(--text-muted);
}

.cart-item-info { flex: 1; min-width: 0; }
.cart-item-name {
    font-size: 0.82rem; font-weight: 600; color: var(--text-primary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.cart-item-meta {
    font-size: 0.7rem; color: var(--text-muted); margin-top: 1px;
}
.cart-item-price {
    font-size: 0.82rem; font-weight: 600; color: var(--text-white);
    font-family: 'JetBrains Mono', monospace;
    min-width: 70px; text-align: right;
}

.cart-item-actions {
    display: flex; align-items: center; gap: 3px; flex-shrink: 0;
}
.cart-item-actions button {
    width: 26px; height: 26px; border-radius: 6px; border: none;
    background: var(--bg-tertiary); color: var(--text-secondary);
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem; transition: all var(--transition);
}
.cart-item-actions button:hover { color: var(--accent); background: var(--accent-light); }
.cart-item-actions button.danger:hover { color: var(--danger); background: var(--danger-bg); }

.cart-empty {
    flex: 1; display: flex; flex-direction: column; align-items: center;
    justify-content: center; color: var(--text-muted); gap: 10px; padding: 40px 20px;
}
.cart-empty i { font-size: 3rem; opacity: 0.4; }
.cart-empty p { font-size: 0.85rem; }

/* Cart totals */
.pos-cart-totals {
    padding: 14px 20px; border-top: 1px solid var(--border); flex-shrink: 0;
}
.cart-total-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 3px 0; font-size: 0.82rem; color: var(--text-secondary);
}
.cart-total-row .label { flex: 1; }
.cart-total-row .value { font-family: 'JetBrains Mono', monospace; text-align: right; }
.cart-total-row.discount .value { color: var(--success); }
.cart-total-row.grand {
    font-size: 1.15rem; font-weight: 700; color: var(--text-white);
    padding: 10px 0 2px; margin-top: 6px; border-top: 1px solid var(--border);
}

/* Discount card in cart */
.pos-discount-card {
    margin: 0 20px; padding: 10px 14px;
    background: var(--accent-light); border: 1px solid var(--accent);
    border-radius: var(--radius-sm); display: flex; align-items: center; gap: 10px;
    flex-shrink: 0;
}
.pos-discount-card i { font-size: 1.3rem; color: var(--accent); }
.pos-discount-card .disc-info { flex: 1; }
.pos-discount-card .disc-name { font-size: 0.8rem; font-weight: 600; color: var(--accent); }
.pos-discount-card .disc-detail { font-size: 0.7rem; color: var(--text-secondary); }

/* Cart actions */
.pos-cart-actions {
    padding: 12px 20px 16px; display: flex; flex-direction: column; gap: 8px; flex-shrink: 0;
}
.pos-checkout-btn {
    width: 100%; padding: 12px; border: none; border-radius: var(--radius-sm);
    background: var(--accent); color: #000; font-size: 0.9rem; font-weight: 700;
    cursor: pointer; transition: all var(--transition);
    display: flex; align-items: center; justify-content: center; gap: 8px;
}
.pos-checkout-btn:hover:not(:disabled) { background: var(--accent-hover); }
.pos-checkout-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.pos-clear-btn {
    width: 100%; padding: 8px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: transparent; color: var(--text-secondary); font-size: 0.78rem;
    cursor: pointer; transition: all var(--transition);
    display: flex; align-items: center; justify-content: center; gap: 6px;
}
.pos-clear-btn:hover { border-color: var(--danger); color: var(--danger); }

/* ============================================
   PAYMENT MODAL
   ============================================ */
.payment-methods-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px;
    margin-bottom: 20px;
}
.payment-method-btn {
    padding: 16px; border-radius: var(--radius);
    background: var(--bg-tertiary); border: 2px solid var(--border);
    color: var(--text-secondary); cursor: pointer; text-align: center;
    transition: all var(--transition);
}
.payment-method-btn:hover { border-color: var(--border-light); }
.payment-method-btn.selected { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }
.payment-method-btn i { display: block; font-size: 1.5rem; margin-bottom: 6px; }
.payment-method-btn span { font-size: 0.8rem; font-weight: 500; }

.payment-summary {
    background: var(--bg-tertiary); border-radius: var(--radius);
    padding: 16px; margin-bottom: 16px;
}
.payment-summary-row {
    display: flex; justify-content: space-between; padding: 4px 0;
    font-size: 0.9rem;
}
.payment-summary-row.total {
    font-size: 1.15rem; font-weight: 700; color: var(--accent);
    border-top: 1px solid var(--border); margin-top: 8px; padding-top: 8px;
}

/* ============================================
   TOOLBAR
   ============================================ */
.toolbar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 20px; flex-wrap: wrap; gap: 12px;
}
.toolbar-left { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.toolbar-right { display: flex; align-items: center; gap: 8px; }

.filter-group { display: flex; align-items: center; gap: 8px; }
.filter-group select, .filter-group input {
    padding: 8px 12px; font-size: 0.8rem; max-width: 160px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1200px) {
    .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
    .pos-layout { grid-template-columns: 1fr 340px; }
    .pos-product-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}
@media (max-width: 768px) {
    .sidebar {
        position: fixed; left: -100%; z-index: 200;
        width: var(--sidebar-width);
        transition: left var(--transition-slow);
    }
    .sidebar.open { left: 0; }
    .sidebar-toggle-mobile { display: block; }
    .topbar-search { display: none; }
    .card-grid.cols-3, .card-grid.cols-4 { grid-template-columns: 1fr; }
    .card-grid.cols-2 { grid-template-columns: 1fr; }
    .pos-layout { grid-template-columns: 1fr; }
    .pos-cart {
        position: fixed; inset: 0; z-index: 150;
        transform: translateX(100%); transition: transform var(--transition-slow);
    }
    .pos-cart.mobile-open { transform: translateX(0); }
    .pos-topbar { flex-wrap: wrap; }
    .pos-topbar-actions .pos-search-box { width: 140px; }
    .pos-product-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
    .form-row { grid-template-columns: 1fr; }
    .form-row.three { grid-template-columns: 1fr; }
    #mobile-cart-btn { display: flex !important; }
}

/* ============================================
   UTILITY
   ============================================ */
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }
.text-muted { color: var(--text-muted); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.font-mono { font-family: 'JetBrains Mono', monospace; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.gap-2 { gap: 8px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.w-full { width: 100%; }
.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.skeleton { background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-hover) 50%, var(--bg-tertiary) 75%); background-size: 200% 100%; animation: shimmer 1.5s infinite; border-radius: var(--radius-sm); }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.empty-state {
    text-align: center; padding: 48px 24px; color: var(--text-muted);
}
.empty-state i { font-size: 3rem; margin-bottom: 12px; display: block; }
.empty-state h3 { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 4px; }
.empty-state p { font-size: 0.85rem; }

.tab-nav { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab-btn {
    padding: 10px 20px; background: none; border: none; border-bottom: 2px solid transparent;
    color: var(--text-secondary); font-size: 0.85rem; font-weight: 500;
    cursor: pointer; transition: all var(--transition);
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }