/* ==========================================================================
   SupplyLens — ERP Theme
   Black & white dense data-heavy UI
   Fonts: IBM Plex Sans (text), JetBrains Mono (numbers/data)
   Colors: Black/white/gray + status only (green/amber/red)
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- CSS Variables --- */
:root {
    --font-text: 'IBM Plex Sans', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
    --black: #000000;
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-150: #eeeeee;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
    --green: #1b8a2a;
    --green-bg: #e8f5e9;
    --amber: #c77d00;
    --amber-bg: #fff8e1;
    --red: #c62828;
    --red-bg: #ffebee;
    --sidebar-w: 185px;
    --header-h: 48px;
    --radius: 3px;
    --shadow: 0 1px 2px rgba(0,0,0,0.06);
    --border: 1px solid var(--gray-200);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 13px; -webkit-font-smoothing: antialiased; }
body {
    font-family: var(--font-text);
    color: var(--gray-900);
    background: var(--gray-100);
    line-height: 1.45;
    overflow-x: hidden;
}
a { color: var(--gray-800); text-decoration: none; }
a:hover { color: var(--black); }
img { max-width: 100%; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* --- Layout --- */
.app-wrapper { display: flex; min-height: 100vh; }

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-w);
    background: var(--white);
    border-right: var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
    overflow-x: hidden;
}
.sidebar-brand {
    padding: 10px 10px;
    border-bottom: var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: var(--header-h);
}
.sidebar-brand .brand-icon {
    width: 30px;
    height: 28px;
    background: var(--black);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 11px;
    flex-shrink: 0;
    letter-spacing: -0.5px;
}
.sidebar-brand .brand-text {
    font-size: 12px;
    font-weight: 600;
    line-height: 1.2;
    color: var(--gray-900);
}
.sidebar-brand .brand-text small {
    display: block;
    font-size: 10px;
    font-weight: 400;
    color: var(--gray-500);
    margin-top: 1px;
}
.sidebar-nav { flex: 1; padding: 8px 0; }
.nav-group { margin-bottom: 2px; }
.nav-group-label {
    padding: 7px 10px 3px;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    user-select: none;
}
.nav-group-label:hover { color: var(--gray-600); }
.nav-group-label svg { width: 12px; height: 12px; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 5px 10px 5px 20px;
    font-size: 11.5px;
    font-weight: 400;
    color: var(--gray-700);
    transition: background 0.1s, color 0.1s;
    border-left: 2px solid transparent;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.nav-item:hover {
    background: var(--gray-50);
    color: var(--black);
}
.nav-item.active {
    background: var(--gray-100);
    color: var(--black);
    font-weight: 600;
    border-left-color: var(--black);
}
.nav-item svg { width: 14px; height: 14px; flex-shrink: 0; opacity: 0.6; }
.nav-item.active svg { opacity: 1; }

.sidebar-footer {
    padding: 10px 16px;
    border-top: var(--border);
    font-size: 11px;
    color: var(--gray-500);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.sidebar-footer a { color: var(--gray-600); font-weight: 500; }
.sidebar-footer a:hover { color: var(--red); }

/* --- Main Content --- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-w);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- Top Header Bar --- */
.top-bar {
    height: var(--header-h);
    background: var(--white);
    border-bottom: var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 50;
}
.top-bar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}
.top-bar-left h1 {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-900);
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    color: var(--gray-400);
}
.breadcrumb a { color: var(--gray-500); }
.breadcrumb a:hover { color: var(--black); }
.breadcrumb .sep { color: var(--gray-300); }
.top-bar-right {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 12px;
    color: var(--gray-600);
}
.top-bar-right .user-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--gray-50);
    border: var(--border);
    border-radius: var(--radius);
    font-weight: 500;
}
.top-bar-right .role-tag {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: 2px 6px;
    border-radius: 2px;
    background: var(--gray-800);
    color: var(--white);
}

/* --- Page Content --- */
.page-content {
    flex: 1;
    padding: 12px 16px 20px;
}

/* --- Toggle Switch for Qty/Amount --- */
.toggle-group {
    display: inline-flex;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    overflow: hidden;
    font-size: 10.5px;
}
.toggle-group .toggle-btn {
    padding: 4px 10px;
    font-weight: 600;
    cursor: pointer;
    background: var(--white);
    color: var(--gray-600);
    border: none;
    border-right: 1px solid var(--gray-300);
    transition: all 0.15s;
}
.toggle-group .toggle-btn:last-child { border-right: none; }
.toggle-group .toggle-btn.active { background: var(--black); color: var(--white); }
.toggle-group .toggle-btn:hover:not(.active) { background: var(--gray-100); }

/* --- Cards --- */
.card {
    background: var(--white);
    border: var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.card-header {
    padding: 10px 14px;
    border-bottom: var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.card-header h3 {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--gray-800);
}
.card-body { padding: 14px; }
.card-body.p-0 { padding: 0; }
.card-footer {
    padding: 8px 14px;
    border-top: var(--border);
    background: var(--gray-50);
    font-size: 11px;
    color: var(--gray-500);
}

/* --- KPI Cards (Dashboard) --- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
    margin-bottom: 14px;
}
.kpi-card {
    background: var(--white);
    border: var(--border);
    border-radius: var(--radius);
    padding: 10px 12px;
    box-shadow: var(--shadow);
}
.kpi-card .kpi-label {
    font-size: 9.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--gray-500);
    margin-bottom: 3px;
}
.kpi-card .kpi-value {
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 600;
    color: var(--black);
    line-height: 1.2;
}
.kpi-card .kpi-sub {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--gray-500);
    margin-top: 2px;
}
.kpi-card.kpi-green { border-left: 3px solid var(--green); }
.kpi-card.kpi-amber { border-left: 3px solid var(--amber); }
.kpi-card.kpi-red { border-left: 3px solid var(--red); }
.kpi-card.kpi-dark { border-left: 3px solid var(--gray-800); }

/* --- Grid Layouts --- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; margin-bottom: 16px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }

/* --- Tables --- */
.table-container { overflow-x: auto; max-width: 100%; }
table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11.5px;
}
table.data-table thead th {
    background: var(--gray-900);
    color: var(--white);
    padding: 6px 7px;
    font-weight: 600;
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    text-align: left;
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 5;
    cursor: pointer;
    user-select: none;
    border-right: 1px solid var(--gray-700);
}
table.data-table thead th:last-child { border-right: none; }
table.data-table thead th:hover { background: var(--gray-800); }
table.data-table thead th .sort-icon {
    display: inline-block;
    margin-left: 3px;
    opacity: 0.3;
    font-size: 9px;
}
table.data-table thead th.sort-asc .sort-icon,
table.data-table thead th.sort-desc .sort-icon { opacity: 1; }
table.data-table tbody td {
    padding: 4px 7px;
    border-bottom: 1px solid var(--gray-150);
    vertical-align: middle;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
}
table.data-table tbody tr:nth-child(even) { background: var(--gray-50); }
table.data-table tbody tr:hover { background: var(--gray-150); }
table.data-table .num {
    font-family: var(--font-mono);
    text-align: right;
    font-size: 11px;
    white-space: nowrap;
}
table.data-table .mono { font-family: var(--font-mono); font-size: 11px; }
table.data-table .nowrap { white-space: nowrap; }
table.data-table .text-center { text-align: center; }
table.data-table .text-right { text-align: right; }
table.data-table .row-actions {
    display: flex;
    gap: 4px;
    justify-content: center;
}

/* Table compact variant */
table.data-table.compact thead th { padding: 5px 6px; font-size: 10px; }
table.data-table.compact tbody td { padding: 3px 6px; font-size: 11px; }

/* --- Badges --- */
.badge {
    display: inline-block;
    padding: 2px 7px;
    border-radius: 2px;
    font-size: 10.5px;
    font-weight: 600;
    font-family: var(--font-mono);
    line-height: 1.4;
    white-space: nowrap;
}
.badge-dark { background: var(--gray-800); color: var(--white); }
.badge-light { background: var(--gray-200); color: var(--gray-800); }
.badge-green { background: var(--green); color: var(--white); }
.badge-amber { background: var(--amber); color: var(--white); }
.badge-red { background: var(--red); color: var(--white); }
.badge-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
    line-height: 1.4;
    white-space: nowrap;
}
.btn svg { width: 14px; height: 14px; }
.btn-primary { background: var(--black); color: var(--white); border-color: var(--black); }
.btn-primary:hover { background: var(--gray-800); }
.btn-secondary { background: var(--white); color: var(--black); border-color: var(--gray-300); }
.btn-secondary:hover { background: var(--gray-50); border-color: var(--gray-400); }
.btn-danger { background: var(--red); color: var(--white); border-color: var(--red); }
.btn-danger:hover { background: #b71c1c; }
.btn-sm { padding: 3px 8px; font-size: 11px; }
.btn-xs { padding: 2px 6px; font-size: 10.5px; }
.btn-group { display: flex; gap: 6px; }

/* --- Forms --- */
.form-group { margin-bottom: 12px; }
.form-label {
    display: block;
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--gray-600);
    margin-bottom: 4px;
}
.form-control {
    width: 100%;
    padding: 6px 10px;
    font-size: 12.5px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background: var(--white);
    color: var(--gray-900);
    transition: border-color 0.15s;
}
.form-control:focus {
    outline: none;
    border-color: var(--gray-600);
}
.form-control::placeholder { color: var(--gray-400); }
select.form-control { appearance: auto; }
textarea.form-control { resize: vertical; min-height: 60px; }
.form-control.mono { font-family: var(--font-mono); }
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.form-inline {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}
.form-inline .form-group { margin-bottom: 0; }
.form-hint { font-size: 11px; color: var(--gray-500); margin-top: 2px; }
.form-error { font-size: 11px; color: var(--red); margin-top: 2px; }

/* --- Filter Bar --- */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    padding: 8px 12px;
    background: var(--gray-50);
    border-bottom: var(--border);
}
.filter-bar .form-control { width: auto; min-width: 120px; font-size: 11.5px; padding: 5px 8px; }
.filter-bar .search-input { min-width: 180px; }
.filter-bar .form-label { font-size: 9.5px; margin-bottom: 2px; }
.filter-bar .form-group { margin-bottom: 0; }

/* --- Alerts / Toasts --- */
.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 12.5px;
    margin-bottom: 12px;
    border: 1px solid;
    display: flex;
    align-items: center;
    gap: 8px;
}
.alert-success { background: var(--green-bg); border-color: var(--green); color: #1b5e20; }
.alert-warning { background: var(--amber-bg); border-color: var(--amber); color: #e65100; }
.alert-error { background: var(--red-bg); border-color: var(--red); color: #b71c1c; }
.alert-info { background: var(--gray-100); border-color: var(--gray-300); color: var(--gray-700); }

/* --- Text Utility --- */
.text-green { color: var(--green); font-weight: 600; }
.text-amber { color: var(--amber); font-weight: 600; }
.text-red { color: var(--red); font-weight: 600; }
.text-muted { color: var(--gray-500); }
.text-small { font-size: 11px; }
.text-mono { font-family: var(--font-mono); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.fw-600 { font-weight: 600; }

/* --- Trend indicators --- */
.trend-up { color: var(--green); font-weight: 700; }
.trend-down { color: var(--red); font-weight: 700; }
.trend-flat { color: var(--gray-400); }

/* --- Upload area --- */
.upload-zone {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}
.upload-zone:hover { border-color: var(--gray-500); background: var(--gray-50); }
.upload-zone.dragover { border-color: var(--black); background: var(--gray-100); }
.upload-zone .upload-icon { font-size: 32px; color: var(--gray-400); margin-bottom: 8px; }
.upload-zone .upload-text { font-size: 13px; color: var(--gray-600); }
.upload-zone .upload-hint { font-size: 11px; color: var(--gray-400); margin-top: 4px; }

/* --- Pagination --- */
.pagination {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 12px;
    font-size: 12px;
}
.pagination a, .pagination span {
    padding: 4px 10px;
    border: var(--border);
    border-radius: var(--radius);
    color: var(--gray-700);
}
.pagination a:hover { background: var(--gray-100); }
.pagination .active { background: var(--black); color: var(--white); border-color: var(--black); }
.pagination .disabled { opacity: 0.4; pointer-events: none; }
.pagination .page-info {
    margin-left: auto;
    font-size: 11px;
    color: var(--gray-500);
    border: none;
    padding: 0;
}

/* --- Chart containers --- */
.chart-container { position: relative; height: 280px; width: 100%; }
.chart-container.chart-sm { height: 200px; }
.chart-container.chart-lg { height: 360px; }

/* --- Modal/Dialog --- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 200;
    align-items: center;
    justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal {
    background: var(--white);
    border-radius: var(--radius);
    width: 90%;
    max-width: 540px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}
.modal-header {
    padding: 12px 16px;
    border-bottom: var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.modal-header h3 { font-size: 14px; font-weight: 600; }
.modal-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--gray-500);
    padding: 4px;
}
.modal-close:hover { color: var(--black); }
.modal-body { padding: 16px; }
.modal-footer {
    padding: 10px 16px;
    border-top: var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* --- Tabs --- */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: var(--border);
    margin-bottom: 14px;
}
.tab-btn {
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 500;
    color: var(--gray-500);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: color 0.15s;
}
.tab-btn:hover { color: var(--black); }
.tab-btn.active { color: var(--black); font-weight: 600; border-bottom-color: var(--black); }

/* --- Login Page --- */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
}
.login-box {
    width: 380px;
    background: var(--white);
    border: var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
.login-header {
    padding: 24px 28px 16px;
    text-align: center;
    border-bottom: var(--border);
}
.login-header .logo-icon {
    width: 48px;
    height: 44px;
    background: var(--black);
    border-radius: var(--radius);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}
.login-header h2 { font-size: 16px; font-weight: 700; color: var(--gray-900); }
.login-header p { font-size: 12px; color: var(--gray-500); margin-top: 4px; }
.login-body { padding: 24px 28px; }
.login-body .form-group { margin-bottom: 16px; }
.login-body .btn { width: 100%; justify-content: center; padding: 8px; font-size: 13px; }
.login-footer {
    padding: 12px 28px;
    background: var(--gray-50);
    text-align: center;
    font-size: 11px;
    color: var(--gray-400);
    border-top: var(--border);
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--gray-400);
}
.empty-state .empty-icon { font-size: 36px; margin-bottom: 10px; }
.empty-state .empty-text { font-size: 13px; margin-bottom: 6px; }
.empty-state .empty-sub { font-size: 11px; color: var(--gray-400); }

/* --- Section Header --- */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}
.section-header h2 {
    font-size: 14px;
    font-weight: 700;
    color: var(--gray-900);
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

/* --- Print --- */
@media print {
    .sidebar, .top-bar { display: none !important; }
    .main-content { margin-left: 0 !important; }
    .page-content { padding: 0 !important; }
}