:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-strong: #cbd5e1;
    --color-hover: #f1f5f9;
    --color-primary: #1e293b;
    --color-primary-darker: #0f172a;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-success: #15803d;
    --color-success-bg: #dcfce7;
    --color-warning: #b45309;
    --color-warning-bg: #fef3c7;
    --color-danger: #b91c1c;
    --color-danger-bg: #fee2e2;
    --color-info: #1d4ed8;
    --color-info-bg: #dbeafe;
    --radius-sm: 4px;
    --radius: 6px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);
    --shadow: 0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
    --font-mono: 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
}

html, body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); text-decoration: underline; }
h1, h2, h3, h4, h5, h6 { color: var(--color-text); font-weight: 600; letter-spacing: -0.01em; }

.text-muted { color: var(--color-text-muted) !important; }
.text-secondary-2 { color: var(--color-text-secondary); }

/* ------------------------------------------------------------------ navbar */
.site-nav {
    background: var(--color-primary-darker);
    border-bottom: 1px solid var(--color-primary);
    padding: 0;
}
.site-nav .navbar-brand {
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    letter-spacing: -0.01em;
    padding: 14px 0;
}
.site-nav .navbar-brand .brand-mark {
    color: var(--color-accent);
    font-weight: 800;
}
.site-nav .nav-link {
    color: #cbd5e1;
    font-size: 13.5px;
    padding: 18px 14px;
    border-bottom: 2px solid transparent;
}
.site-nav .nav-link:hover { color: #fff; }
.site-nav .nav-link.active { color: #fff; border-bottom-color: var(--color-accent); }
.site-nav .navbar-toggler { border-color: rgba(255,255,255,.2); }
.site-nav .badge { background: var(--color-accent); color: #fff; font-weight: 500; }
.site-nav .dropdown-menu { border: 1px solid var(--color-border); box-shadow: var(--shadow); border-radius: var(--radius); padding: 4px; }
.site-nav .dropdown-item { font-size: 13.5px; padding: 8px 12px; border-radius: var(--radius-sm); }
.site-nav .dropdown-item:hover { background: var(--color-hover); }

/* ------------------------------------------------------------------ buttons */
.btn { font-size: 13.5px; font-weight: 500; border-radius: var(--radius); padding: 8px 14px; transition: background .12s ease, border-color .12s ease; }
.btn-sm { font-size: 12.5px; padding: 5px 10px; }
.btn-lg { font-size: 14px; padding: 10px 18px; }
.btn-primary { background: var(--color-accent); border-color: var(--color-accent); }
.btn-primary:hover, .btn-primary:focus { background: var(--color-accent-hover); border-color: var(--color-accent-hover); }
.btn-dark { background: var(--color-primary); border-color: var(--color-primary); }
.btn-dark:hover { background: var(--color-primary-darker); border-color: var(--color-primary-darker); }
.btn-outline-secondary { color: var(--color-text-secondary); border-color: var(--color-border-strong); background: #fff; }
.btn-outline-secondary:hover { background: var(--color-hover); color: var(--color-text); border-color: var(--color-border-strong); }
.btn-outline-primary { color: var(--color-accent); border-color: var(--color-accent); background: #fff; }
.btn-outline-primary:hover { background: var(--color-accent); color: #fff; }
.btn-outline-danger { color: var(--color-danger); border-color: #fecaca; background: #fff; }
.btn-outline-danger:hover { background: var(--color-danger); color: #fff; border-color: var(--color-danger); }

/* ------------------------------------------------------------------ cards */
.card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    box-shadow: none;
}
.card-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 16px;
    font-weight: 600;
    color: var(--color-text);
}
.card-body { padding: 16px; }

/* ------------------------------------------------------------------ tables */
.table {
    margin-bottom: 0;
    color: var(--color-text);
    font-size: 13px;
    border-color: var(--color-border);
}
.table > thead {
    background: var(--color-hover);
    border-bottom: 1px solid var(--color-border-strong);
}
.table > thead th {
    color: var(--color-text-secondary);
    font-size: 11.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border-strong);
    background: var(--color-hover);
}
.table > tbody td { padding: 11px 12px; vertical-align: middle; border-color: var(--color-border); }
.table > tbody tr:hover { background: var(--color-hover); }

/* ------------------------------------------------------------------ forms */
.form-control, .form-select {
    font-size: 13.5px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    background: #fff;
    color: var(--color-text);
    padding: 7px 10px;
}
.form-control:focus, .form-select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
}
.form-control-lg, .form-select-lg { padding: 10px 14px; font-size: 14px; }
.form-control-sm, .form-select-sm { padding: 5px 8px; font-size: 12.5px; }
.form-label { font-size: 12.5px; font-weight: 500; color: var(--color-text-secondary); margin-bottom: 4px; }
.input-group-text { font-size: 13px; background: var(--color-hover); border-color: var(--color-border-strong); color: var(--color-text-secondary); }

/* ------------------------------------------------------------------ tabs */
.nav-tabs { border-bottom: 1px solid var(--color-border); margin-bottom: 16px; }
.nav-tabs .nav-link {
    color: var(--color-text-secondary);
    border: none;
    border-bottom: 2px solid transparent;
    padding: 10px 16px;
    font-size: 13.5px;
    font-weight: 500;
    background: transparent;
    margin-bottom: -1px;
    border-radius: 0;
}
.nav-tabs .nav-link:hover { color: var(--color-text); }
.nav-tabs .nav-link.active {
    color: var(--color-accent);
    background: transparent;
    border-color: transparent;
    border-bottom: 2px solid var(--color-accent);
}

/* ------------------------------------------------------------------ badges */
.badge {
    font-weight: 500;
    font-size: 11px;
    padding: 3px 7px;
    border-radius: 3px;
    letter-spacing: 0.02em;
}
.badge.bg-success { background: var(--color-success-bg) !important; color: var(--color-success) !important; }
.badge.bg-warning { background: var(--color-warning-bg) !important; color: var(--color-warning) !important; }
.badge.bg-danger { background: var(--color-danger-bg) !important; color: var(--color-danger) !important; }
.badge.bg-info { background: var(--color-info-bg) !important; color: var(--color-info) !important; }
.badge.bg-secondary { background: var(--color-hover) !important; color: var(--color-text-secondary) !important; }

/* ------------------------------------------------------------------ domain badges */
.oem-code {
    font-family: var(--font-mono);
    background: #fff;
    color: var(--color-text);
    padding: 3px 8px;
    border-radius: 3px;
    font-weight: 600;
    font-size: 12.5px;
    border: 1px solid var(--color-border-strong);
    letter-spacing: 0.02em;
}
.cross-ref-badge {
    font-family: var(--font-mono);
    background: var(--color-info-bg);
    color: var(--color-info);
    border: 1px solid #bfdbfe;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 11.5px;
    display: inline-block;
    margin-right: 4px;
    margin-bottom: 4px;
}
.stock-indicator { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 500; }
.stock-indicator::before { content: ''; width: 8px; height: 8px; border-radius: 50%; }
.stock-indicator.in-stock { color: var(--color-success); }
.stock-indicator.in-stock::before { background: var(--color-success); }
.stock-indicator.low-stock { color: var(--color-warning); }
.stock-indicator.low-stock::before { background: var(--color-warning); }
.stock-indicator.out-stock { color: var(--color-danger); }
.stock-indicator.out-stock::before { background: var(--color-danger); }

.dealer-price { color: var(--color-text); font-weight: 600; }
.list-price-strike { text-decoration: line-through; color: var(--color-text-muted); font-size: 12px; }

/* ------------------------------------------------------------------ search hero (sober) */
.search-panel {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 18px;
}
.search-panel .nav-tabs { margin-bottom: 14px; }

.page-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 0;
}
.page-header h1 { font-size: 20px; margin-bottom: 0; font-weight: 600; }
.page-header .lead { color: var(--color-text-secondary); font-size: 13.5px; margin-bottom: 0; margin-top: 2px; }

.breadcrumb { font-size: 12.5px; margin-bottom: 0; }
.breadcrumb-item a { color: var(--color-text-secondary); }
.breadcrumb-item.active { color: var(--color-text-muted); }
.breadcrumb-item + .breadcrumb-item::before { content: "›"; color: var(--color-text-muted); }

/* ------------------------------------------------------------------ part card */
.part-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px 16px;
    transition: border-color .12s ease;
}
.part-row:hover { border-color: var(--color-border-strong); }
.part-row .meta-row { display: flex; gap: 12px; align-items: center; margin-bottom: 4px; }
.part-row .name { font-weight: 600; color: var(--color-text); margin-bottom: 4px; font-size: 14px; }
.part-row .desc { color: var(--color-text-secondary); font-size: 12.5px; }

/* ------------------------------------------------------------------ alerts */
.alert {
    border: 1px solid;
    border-radius: var(--radius);
    font-size: 13.5px;
    padding: 10px 14px;
}
.alert-info { background: var(--color-info-bg); border-color: #bfdbfe; color: var(--color-info); }
.alert-warning { background: var(--color-warning-bg); border-color: #fde68a; color: var(--color-warning); }
.alert-success { background: var(--color-success-bg); border-color: #bbf7d0; color: var(--color-success); }
.alert-danger { background: var(--color-danger-bg); border-color: #fecaca; color: var(--color-danger); }

/* ------------------------------------------------------------------ admin */
.admin-shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.admin-sidebar {
    background: var(--color-primary-darker);
    color: #cbd5e1;
    padding: 0;
    border-right: 1px solid var(--color-primary);
}
.admin-sidebar .brand {
    padding: 18px 20px;
    border-bottom: 1px solid #1e293b;
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    display: block;
}
.admin-sidebar .brand .brand-mark { color: var(--color-accent); }
.admin-sidebar .sidebar-group { padding: 16px 12px 4px; }
.admin-sidebar .sidebar-group-title {
    color: #64748b;
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0 8px 6px;
    font-weight: 600;
}
.admin-sidebar .sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    color: #cbd5e1;
    font-size: 13.5px;
    border-radius: var(--radius-sm);
    margin-bottom: 1px;
}
.admin-sidebar .sidebar-link:hover { background: #1e293b; color: #fff; text-decoration: none; }
.admin-sidebar .sidebar-link.active { background: var(--color-accent); color: #fff; }
.admin-sidebar .sidebar-link i { width: 16px; text-align: center; font-size: 14px; color: #94a3b8; }
.admin-sidebar .sidebar-link.active i { color: #fff; }

.admin-content { background: var(--color-bg); display: flex; flex-direction: column; min-height: 100vh; }
.admin-topbar {
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.admin-topbar h1 { font-size: 16px; font-weight: 600; margin: 0; }
.admin-topbar .breadcrumb { margin-top: 2px; }
.admin-body { padding: 24px; flex: 1; }

/* admin stat cards */
.kpi-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px 16px;
}
.kpi-card .label { font-size: 11.5px; font-weight: 600; text-transform: uppercase; color: var(--color-text-muted); letter-spacing: 0.06em; margin-bottom: 4px; }
.kpi-card .value { font-size: 22px; font-weight: 700; color: var(--color-text); line-height: 1.2; }
.kpi-card .delta { font-size: 12px; color: var(--color-text-secondary); margin-top: 4px; }
.kpi-card .delta.up { color: var(--color-success); }
.kpi-card .delta.down { color: var(--color-danger); }

.section-title { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-secondary); margin: 24px 0 10px; }

/* Compact data list (key-value) */
.kv-list { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; font-size: 13px; }
.kv-list dt { color: var(--color-text-muted); font-weight: 500; }
.kv-list dd { color: var(--color-text); margin: 0; }

/* status pill */
.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    font-weight: 500;
    padding: 3px 8px;
    border-radius: 999px;
}
.status-pill::before { content: ''; width: 6px; height: 6px; border-radius: 50%; }
.status-pill.preparing { background: #fef3c7; color: #92400e; }
.status-pill.preparing::before { background: #b45309; }
.status-pill.shipping { background: #dbeafe; color: #1e40af; }
.status-pill.shipping::before { background: #2563eb; }
.status-pill.completed { background: #dcfce7; color: #14532d; }
.status-pill.completed::before { background: #16a34a; }
.status-pill.cancelled { background: #fee2e2; color: #991b1b; }
.status-pill.cancelled::before { background: #dc2626; }

/* print */
@media print {
    .no-print, .site-nav, .admin-sidebar, .admin-topbar, footer { display: none !important; }
    body, .admin-body, .admin-content, .admin-shell { background: #fff !important; padding: 0 !important; }
    .card { border: 1px solid #000; box-shadow: none; }
}

/* footer */
.site-footer { background: #fff; border-top: 1px solid var(--color-border); padding: 18px 0; font-size: 12.5px; color: var(--color-text-muted); margin-top: 40px; }

/* ------------------------------------------------------------------ toast */
.toast-stack {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 1080;
    width: 360px;
    max-width: calc(100vw - 48px);
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}
.app-toast {
    background: #fff;
    border: 1px solid var(--color-border-strong);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius);
    padding: 12px 14px;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.10);
    display: flex;
    gap: 10px;
    align-items: flex-start;
    pointer-events: auto;
    animation: toast-in .2s ease;
}
.app-toast.success { border-left-color: var(--color-success); }
.app-toast.danger { border-left-color: var(--color-danger); }
.app-toast.info { border-left-color: var(--color-info); }
.app-toast.warning { border-left-color: var(--color-warning); }
.app-toast .icon { width: 18px; flex-shrink: 0; padding-top: 2px; }
.app-toast.success .icon { color: var(--color-success); }
.app-toast.danger .icon { color: var(--color-danger); }
.app-toast.info .icon { color: var(--color-info); }
.app-toast .body { flex: 1; font-size: 13px; line-height: 1.4; color: var(--color-text); }
.app-toast .body .title { font-weight: 600; margin-bottom: 1px; }
.app-toast .body .desc { color: var(--color-text-secondary); font-size: 12.5px; }
.app-toast .close { border: 0; background: transparent; color: var(--color-text-muted); cursor: pointer; padding: 0 4px; line-height: 1; }
.app-toast.fading { animation: toast-out .25s ease forwards; }
@keyframes toast-in { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toast-out { to { transform: translateX(20px); opacity: 0; } }

/* ------------------------------------------------------------------ cart redesign */
.cart-item {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px 16px;
    display: grid;
    grid-template-columns: 56px 1fr 110px 130px 40px;
    gap: 16px;
    align-items: center;
    margin-bottom: 10px;
    transition: border-color .12s ease;
}
.cart-item:hover { border-color: var(--color-border-strong); }
.cart-item .thumb {
    width: 56px;
    height: 56px;
    background: var(--color-hover);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 24px;
    border: 1px solid var(--color-border);
}
.cart-item .info .name { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.cart-item .info .meta { color: var(--color-text-muted); font-size: 12px; display: flex; gap: 10px; flex-wrap: wrap; }
.qty-stepper { display: inline-flex; align-items: center; border: 1px solid var(--color-border-strong); border-radius: var(--radius); overflow: hidden; }
.qty-stepper button { background: var(--color-hover); border: 0; width: 30px; height: 30px; font-size: 16px; font-weight: 500; color: var(--color-text-secondary); cursor: pointer; }
.qty-stepper button:hover { background: var(--color-border); color: var(--color-text); }
.qty-stepper input { width: 50px; height: 30px; border: 0; text-align: center; font-size: 13px; font-weight: 600; background: #fff; }
.qty-stepper input:focus { outline: 0; }
.cart-item .line-total { text-align: right; font-weight: 600; font-size: 14px; }
.cart-item .remove { color: var(--color-text-muted); border: 0; background: transparent; padding: 4px 6px; cursor: pointer; }
.cart-item .remove:hover { color: var(--color-danger); }

.summary-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 18px;
    position: sticky;
    top: 1rem;
}
.summary-card .row-line { display: flex; justify-content: space-between; padding: 6px 0; font-size: 13.5px; }
.summary-card .row-line.discount { color: var(--color-success); }
.summary-card .row-line.muted { color: var(--color-text-muted); }
.summary-card hr { margin: 8px 0; border-color: var(--color-border); }
.summary-card .grand { font-size: 18px; font-weight: 700; padding-top: 8px; }

/* ------------------------------------------------------------------ order tracker */
.order-tracker {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    margin: 8px 0 18px;
}
.order-tracker .stage {
    position: relative;
    padding: 10px 8px 8px;
    text-align: center;
}
.order-tracker .stage:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -50%;
    top: 22px;
    width: 100%;
    height: 2px;
    background: var(--color-border);
    z-index: 0;
}
.order-tracker .stage .dot {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--color-border);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 6px;
    font-size: 13px;
    font-weight: 600;
    position: relative;
    z-index: 1;
}
.order-tracker .stage .label { font-size: 11.5px; color: var(--color-text-muted); font-weight: 500; }
.order-tracker .stage.done .dot, .order-tracker .stage.current .dot {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}
.order-tracker .stage.done .label, .order-tracker .stage.current .label { color: var(--color-text); font-weight: 600; }
.order-tracker .stage.done:not(:last-child)::after { background: var(--color-accent); }
.order-tracker .stage.current .dot { box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15); }
.order-tracker .stage.cancelled .dot { background: var(--color-danger); border-color: var(--color-danger); color: #fff; }

.order-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 10px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 18px;
}
.order-card .row-1 { display: flex; align-items: center; gap: 12px; }
.order-card .order-number { font-family: var(--font-mono); font-size: 13px; font-weight: 600; }
.order-card .meta { color: var(--color-text-muted); font-size: 12.5px; }
.order-card .total { font-size: 16px; font-weight: 700; }
.order-card .actions { display: flex; gap: 6px; align-items: center; }

.add-cart-btn-success {
    background: var(--color-success) !important;
    border-color: var(--color-success) !important;
    color: #fff !important;
    transition: background .25s ease;
}

/* utilities */
.font-mono { font-family: var(--font-mono); }
.fs-small { font-size: 12.5px; }
.fs-xs { font-size: 11.5px; }
.fw-medium { font-weight: 500; }
.divider-y { border-bottom: 1px solid var(--color-border); }
.empty-state { padding: 48px 24px; text-align: center; color: var(--color-text-muted); }
.empty-state i { font-size: 36px; color: var(--color-border-strong); margin-bottom: 12px; }
.empty-state h6 { color: var(--color-text); margin-bottom: 4px; font-weight: 600; }