@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ============================================================
   CSS VARIABLES / DESIGN TOKENS
   ============================================================ */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --primary-dark: #3730a3;

    --secondary: #6366f1;

    --success: #10b981;
    --success-light: #ecfdf5;
    --success-dark: #059669;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --warning-dark: #d97706;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --danger-dark: #dc2626;
    --info: #3b82f6;
    --info-light: #eff6ff;
    --info-dark: #2563eb;

    --gray-900: #0f172a;
    --gray-800: #1e293b;
    --gray-700: #334155;
    --gray-600: #475569;
    --gray-500: #64748b;
    --gray-400: #94a3b8;
    --gray-300: #cbd5e1;
    --gray-200: #e2e8f0;
    --gray-100: #f1f5f9;
    --gray-50: #f8fafc;

    --bg-main: #f1f5f9;
    --bg-card: #ffffff;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.03);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);

    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --header-height: 64px;

    --transition: 0.2s ease;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font-family);
    background-color: var(--bg-main);
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: var(--primary); transition: color var(--transition); }
a:hover { color: var(--primary-hover); }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: inherit; }

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

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-card);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
    z-index: 100;
    position: relative;
    flex-shrink: 0;
}

.sidebar.collapsed { width: var(--sidebar-collapsed-width); }

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 var(--space-5);
    border-bottom: 1px solid var(--gray-100);
    gap: var(--space-3);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary);
    white-space: nowrap;
}

.logo-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.sidebar.collapsed .logo-text { display: none; }

.sidebar-menu {
    flex: 1;
    padding: var(--space-3);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-menu::-webkit-scrollbar { width: 4px; }
.sidebar-menu::-webkit-scrollbar-track { background: transparent; }
.sidebar-menu::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: var(--radius-full); }

.menu-label {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    color: var(--gray-400);
    margin: var(--space-5) 0 var(--space-2) var(--space-3);
}

.sidebar.collapsed .menu-label { display: none; }

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    color: var(--gray-600);
    border-radius: var(--radius-md);
    margin-bottom: 2px;
    transition: all var(--transition);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    position: relative;
}

.menu-item:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.menu-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

.menu-item .material-symbols-rounded { font-size: 1.25rem; flex-shrink: 0; }

.sidebar.collapsed .menu-item span:not(.material-symbols-rounded) { display: none; }
.sidebar.collapsed .menu-item { justify-content: center; padding: var(--space-2) 0; }

.sidebar-footer {
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--gray-100);
    flex-shrink: 0;
}

/* ============================================================
   MAIN CONTENT AREA
   ============================================================ */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* ============================================================
   TOPBAR
   ============================================================ */
.topbar {
    height: var(--header-height);
    background: var(--bg-card);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-6);
    flex-shrink: 0;
    z-index: 90;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.toggle-sidebar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: var(--radius-md);
    color: var(--gray-600);
    transition: all var(--transition);
}
.toggle-sidebar-btn:hover { background: var(--gray-100); }

.page-title-bar {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.datetime {
    font-size: 0.8125rem;
    color: var(--gray-500);
    font-weight: 500;
}

.icon-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: var(--radius-full);
    color: var(--gray-500);
    transition: all var(--transition);
}
.icon-btn:hover { background: var(--gray-100); color: var(--gray-700); }

.badge-dot {
    position: absolute;
    top: 6px; right: 6px;
    width: 8px; height: 8px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid var(--bg-card);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
}
.user-profile:hover { background: var(--gray-100); }

.avatar {
    width: 34px; height: 34px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.8125rem;
}

.user-info { display: flex; flex-direction: column; }
.user-name { font-size: 0.8125rem; font-weight: 600; color: var(--gray-800); }
.user-role { font-size: 0.6875rem; color: var(--gray-500); }

/* ============================================================
   PAGE CONTENT
   ============================================================ */
.page-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-6);
}

.page-content::-webkit-scrollbar { width: 6px; }
.page-content::-webkit-scrollbar-track { background: transparent; }
.page-content::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: var(--radius-full); }

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.page-header-left {}
.page-header-left h1 { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); }
.page-header-left p { font-size: 0.875rem; color: var(--gray-500); margin-top: var(--space-1); }

.page-actions {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all var(--transition);
    white-space: nowrap;
    border: 1px solid transparent;
}

.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.75rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 0.9375rem; }

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

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

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

.btn-warning { background: var(--warning); color: white; border-color: var(--warning); }
.btn-warning:hover { background: var(--warning-dark); border-color: var(--warning-dark); color: white; }

.btn-secondary { background: var(--gray-100); color: var(--gray-700); border-color: var(--gray-200); }
.btn-secondary:hover { background: var(--gray-200); }

.btn-outline { background: white; color: var(--gray-700); border-color: var(--gray-300); }
.btn-outline:hover { background: var(--gray-50); border-color: var(--gray-400); }

.btn-ghost { color: var(--gray-600); }
.btn-ghost:hover { background: var(--gray-100); }

/* ============================================================
   CARDS
   ============================================================ */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title { font-size: 0.9375rem; font-weight: 600; color: var(--gray-900); }
.card-body { padding: var(--space-5); }
.card-footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--gray-100);
}

/* ============================================================
   STAT CARDS
   ============================================================ */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.stat-card {
    display: flex;
    align-items: center;
    padding: var(--space-5);
    gap: var(--space-4);
}

.stat-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon .material-symbols-rounded { font-size: 1.5rem; }

.stat-primary { background: var(--primary-light); color: var(--primary); }
.stat-success { background: var(--success-light); color: var(--success); }
.stat-warning { background: var(--warning-light); color: var(--warning); }
.stat-danger { background: var(--danger-light); color: var(--danger); }
.stat-info { background: var(--info-light); color: var(--info); }

.stat-content { flex: 1; min-width: 0; }
.stat-label { font-size: 0.8125rem; color: var(--gray-500); margin-bottom: 2px; }
.stat-value { font-size: 1.375rem; font-weight: 700; color: var(--gray-900); line-height: 1.2; }
.stat-change {
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 4px;
    display: inline-flex;
    align-items: center;
    gap: 2px;
}
.stat-change.up { color: var(--success); }
.stat-change.down { color: var(--danger); }

/* ============================================================
   FORMS
   ============================================================ */
.form-group { margin-bottom: var(--space-4); }

.form-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--gray-800);
    background: white;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control::placeholder { color: var(--gray-400); }

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

select.form-control { cursor: pointer; }

textarea.form-control { resize: vertical; min-height: 80px; }

.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.875rem;
    color: var(--gray-700);
    cursor: pointer;
}

.form-check input[type="checkbox"] {
    width: 16px; height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

.input-group {
    display: flex;
    align-items: stretch;
}

.input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: 0 var(--space-3);
    background: var(--gray-50);
    border: 1px solid var(--gray-300);
    border-left: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ============================================================
   BADGES
   ============================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: capitalize;
    gap: 4px;
}

.badge-success { background: var(--success-light); color: var(--success-dark); }
.badge-warning { background: var(--warning-light); color: var(--warning-dark); }
.badge-danger { background: var(--danger-light); color: var(--danger-dark); }
.badge-info { background: var(--info-light); color: var(--info-dark); }
.badge-primary { background: var(--primary-light); color: var(--primary-dark); }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }

/* ============================================================
   TABLES
   ============================================================ */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
}

.table {
    width: 100%;
    border-collapse: collapse;
    white-space: nowrap;
}

.table th, .table td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
}

.table th {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    color: var(--gray-500);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.table td {
    font-size: 0.8125rem;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
}

.table tbody tr { transition: background var(--transition); }
.table tbody tr:hover { background: var(--gray-50); }

.table .product-cell {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.product-thumb {
    width: 36px; height: 36px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    flex-shrink: 0;
}

.product-thumb .material-symbols-rounded { font-size: 1.125rem; }

.actions-cell {
    display: flex;
    gap: var(--space-1);
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px; height: 30px;
    border-radius: var(--radius-sm);
    color: var(--gray-500);
    transition: all var(--transition);
}

.action-btn:hover { background: var(--gray-100); color: var(--gray-700); }
.action-btn.edit:hover { background: var(--info-light); color: var(--info); }
.action-btn.delete:hover { background: var(--danger-light); color: var(--danger); }
.action-btn .material-symbols-rounded { font-size: 1.125rem; }

/* ============================================================
   MODALS
   ============================================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15,23,42,0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: var(--space-4);
}

.modal-overlay.active { opacity: 1; visibility: visible; }

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    transform: translateY(20px) scale(0.98);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-xl);
}

.modal.modal-lg { max-width: 720px; }
.modal.modal-sm { max-width: 400px; }

.modal-overlay.active .modal { transform: translateY(0) scale(1); }

.modal-header {
    padding: var(--space-5);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title { font-size: 1.0625rem; font-weight: 600; color: var(--gray-900); }

.close-modal {
    color: var(--gray-400);
    transition: color var(--transition);
    display: flex;
    align-items: center;
}
.close-modal:hover { color: var(--gray-700); }

.modal-body { padding: var(--space-5); overflow-y: auto; flex: 1; }

.modal-footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--gray-100);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* ============================================================
   FILTER BAR
   ============================================================ */
.filter-bar {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.search-input {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 360px;
}

.search-input .material-symbols-rounded {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: 1.25rem;
}

.search-input .form-control {
    padding-left: 36px;
}

.filter-select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    color: var(--gray-700);
    background: white;
    cursor: pointer;
    min-width: 140px;
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary);
}

/* ============================================================
   PAGINATION
   ============================================================ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    flex-wrap: wrap;
    gap: var(--space-3);
}

.pagination-info { font-size: 0.8125rem; color: var(--gray-500); }

.pagination-btns {
    display: flex;
    gap: var(--space-1);
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px; height: 32px;
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--gray-600);
    border: 1px solid var(--gray-200);
    background: white;
    transition: all var(--transition);
    padding: 0 var(--space-2);
}

.page-btn:hover { background: var(--gray-50); border-color: var(--gray-300); }
.page-btn.active { background: var(--primary); color: white; border-color: var(--primary); }

/* ============================================================
   TABS
   ============================================================ */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: var(--space-5);
    gap: var(--space-1);
}

.tab-btn {
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-500);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all var(--transition);
}

.tab-btn:hover { color: var(--gray-700); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ============================================================
   CHART PLACEHOLDER
   ============================================================ */
.chart-placeholder {
    height: 260px;
    background: linear-gradient(180deg, var(--gray-50) 0%, white 100%);
    border: 1px dashed var(--gray-200);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    font-size: 0.875rem;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

/* Mini chart bars for visual flair */
.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 160px;
    padding: var(--space-4);
}

.chart-bar {
    width: 24px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    opacity: 0.6;
    transition: opacity var(--transition);
}

.chart-bar:hover { opacity: 1; }

/* donut placeholder */
.donut-placeholder {
    width: 200px; height: 200px;
    border-radius: 50%;
    background: conic-gradient(
        var(--primary) 0deg 130deg,
        var(--success) 130deg 210deg,
        var(--warning) 210deg 280deg,
        var(--info) 280deg 330deg,
        var(--danger) 330deg 360deg
    );
    position: relative;
}

.donut-placeholder::after {
    content: '';
    position: absolute;
    inset: 40px;
    background: white;
    border-radius: 50%;
}

/* ============================================================
   ALERT / TOAST
   ============================================================ */
.alert {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    margin-bottom: var(--space-4);
    border: 1px solid transparent;
}

.alert-success { background: var(--success-light); color: var(--success-dark); border-color: #a7f3d0; }
.alert-warning { background: var(--warning-light); color: var(--warning-dark); border-color: #fde68a; }
.alert-danger { background: var(--danger-light); color: var(--danger-dark); border-color: #fecaca; }
.alert-info { background: var(--info-light); color: var(--info-dark); border-color: #bfdbfe; }

.toast {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    padding: var(--space-3) var(--space-5);
    background: var(--gray-900);
    color: white;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show { transform: translateY(0); opacity: 1; }

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
    padding: var(--space-12);
    text-align: center;
    color: var(--gray-400);
}

.empty-state .material-symbols-rounded { font-size: 3rem; margin-bottom: var(--space-4); }
.empty-state p { font-size: 0.9375rem; color: var(--gray-500); }
.empty-state .btn { margin-top: var(--space-4); }

/* ============================================================
   GRID HELPERS
   ============================================================ */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mt-4 { margin-top: var(--space-4); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.fw-600 { font-weight: 600; }
.text-sm { font-size: 0.8125rem; }
.text-muted { color: var(--gray-500); }

/* ============================================================
   POS SPECIFIC STYLES
   ============================================================ */
.pos-container {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-4);
    height: calc(100vh - var(--header-height));
    padding: var(--space-4);
    overflow: hidden;
}

.pos-products {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pos-categories {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    overflow-x: auto;
    padding-bottom: var(--space-2);
    flex-shrink: 0;
}

.cat-btn {
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--gray-600);
    background: white;
    border: 1px solid var(--gray-200);
    white-space: nowrap;
    transition: all var(--transition);
}

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

.pos-product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(125px, 1fr));
    gap: var(--space-2);
    overflow-y: auto;
    flex: 1;
    padding-right: var(--space-2);
    align-content: start;
}

.pos-product-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--space-2.5);
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    aspect-ratio: 1 / 1;
}

.pos-product-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.pos-product-img {
    display: none;
}

.pos-product-name {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pos-product-sku {
    font-size: 0.6875rem;
    color: var(--gray-500);
    margin-bottom: var(--space-1);
}

.pos-product-price {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--primary);
}

.pos-product-stock {
    font-size: 0.6875rem;
    color: var(--gray-500);
    margin-top: 2px;
}

/* POS Cart */
.pos-cart {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pos-cart-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--gray-100);
}

.pos-cart-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
}

.pos-cart-header .invoice-no {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 2px;
}

.pos-cart-items {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-3);
}

.cart-item {
    display: flex;
    align-items: center;
    padding: var(--space-3);
    border-bottom: 1px solid var(--gray-100);
    gap: var(--space-3);
}

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

.cart-item-info { flex: 1; min-width: 0; }
.cart-item-name { font-size: 0.8125rem; font-weight: 600; color: var(--gray-800); }
.cart-item-price { font-size: 0.75rem; color: var(--gray-500); }

.qty-control {
    display: flex;
    align-items: center;
    gap: 0;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
}

.qty-btn {
    width: 28px; height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    transition: all var(--transition);
}

.qty-btn:hover { background: var(--gray-100); }

.qty-value {
    width: 32px;
    text-align: center;
    font-size: 0.8125rem;
    font-weight: 600;
    border-left: 1px solid var(--gray-200);
    border-right: 1px solid var(--gray-200);
    height: 28px;
    line-height: 28px;
}

.cart-item-total {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-800);
    min-width: 60px;
    text-align: right;
}

.cart-item-remove {
    color: var(--gray-400);
    transition: color var(--transition);
}

.cart-item-remove:hover { color: var(--danger); }

.pos-cart-summary {
    border-top: 1px solid var(--gray-200);
    padding: var(--space-4);
    background: var(--gray-50);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.8125rem;
    color: var(--gray-600);
    margin-bottom: var(--space-2);
}

.summary-row.total {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    padding-top: var(--space-2);
    border-top: 1px solid var(--gray-300);
    margin-top: var(--space-2);
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-2);
    margin: var(--space-3) 0;
}

.payment-btn {
    padding: var(--space-2);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-600);
    background: white;
    text-align: center;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.payment-btn:hover { border-color: var(--primary); color: var(--primary); }
.payment-btn.active { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }
.payment-btn .material-symbols-rounded { font-size: 1.25rem; }

.pos-cart-actions {
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    border-top: 1px solid var(--gray-200);
}

.btn-complete-sale {
    padding: 0.875rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    transition: all var(--transition);
    width: 100%;
}

.btn-complete-sale:hover {
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
    transform: translateY(-1px);
}

.cart-secondary-actions {
    display: flex;
    gap: var(--space-2);
}

.cart-secondary-actions .btn { flex: 1; }

/* ============================================================
   UPLOAD / LOGO AREA
   ============================================================ */
.upload-area {
    width: 120px;
    height: 120px;
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    cursor: pointer;
    transition: all var(--transition);
    gap: var(--space-2);
}

.upload-area:hover { border-color: var(--primary); color: var(--primary); }
.upload-area .material-symbols-rounded { font-size: 2rem; }
.upload-area span { font-size: 0.75rem; font-weight: 500; }

/* ============================================================
   TOGGLE / SWITCH
   ============================================================ */
.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    display: inline-block;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--gray-300);
    border-radius: var(--radius-full);
    transition: 0.3s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider { background: var(--primary); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(20px); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1280px) {
    .pos-container {
        grid-template-columns: 1fr 340px;
    }
}

@media (max-width: 1024px) {
    .sidebar { position: fixed; left: 0; top: 0; bottom: 0; z-index: 200; }
    .sidebar:not(.collapsed) {
        box-shadow: var(--shadow-xl);
    }
    .sidebar.collapsed { width: 0; border: none; overflow: hidden; }
    .sidebar.collapsed .sidebar-header,
    .sidebar.collapsed .sidebar-menu,
    .sidebar.collapsed .sidebar-footer { display: none; }

    .pos-container {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr auto;
    }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .page-content { padding: var(--space-4); }
    .grid-cards { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    .user-info { display: none; }
    .datetime { display: none !important; }
    .filter-bar { flex-direction: column; align-items: stretch; }
    .search-input { max-width: none; }
}

@media (max-width: 480px) {
    .grid-cards { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .pos-product-grid { grid-template-columns: repeat(2, 1fr); }
    .payment-methods { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   LOGIN PAGE STYLES
   ============================================================ */
.login-page {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-main);
    padding: var(--space-4);
}

.login-container {
    width: 100%;
    max-width: 440px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--space-8);
    border: 1px solid var(--gray-200);
}

.login-header { text-align: center; margin-bottom: var(--space-6); }

.login-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px; height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

.login-logo .material-symbols-rounded { font-size: 32px; }

.login-title { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); margin-bottom: var(--space-1); }
.login-subtitle { color: var(--gray-500); font-size: 0.875rem; }

.password-input-wrapper { position: relative; }

.toggle-password {
    position: absolute;
    right: 12px; top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    padding: 0;
    display: flex;
}

.login-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
    font-size: 0.875rem;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--gray-600);
    cursor: pointer;
}

.btn-login { width: 100%; padding: 0.75rem; font-size: 0.9375rem; font-weight: 600; }