/* ================================================================
   QM WHEELS Inventory Management — Industrial Precision Design
   Aesthetic: Refined warehouse — deep navy + warm amber + raw steel
   ================================================================ */

/* ── Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --sidebar-w: 232px;
    --topbar-h: 60px;

    /* Core palette */
    --navy-950: #e8e4dd;
    --navy-900: #ede9e2;
    --navy-800: #f0ece6;
    --navy-700: #d5cfc7;

    --amber:       #c87d2b;
    --amber-hover: #b06d1e;
    --amber-light: #fdf6ed;
    --amber-pale:  #faf3e8;

    --steel-50:  #f9f8f6;
    --steel-100: #f3f2ef;
    --steel-200: #e8e6e1;
    --steel-300: #d5d2cc;
    --steel-400: #b0aca4;
    --steel-500: #8b8780;
    --steel-700: #4a4742;
    --steel-900: #1e1d1a;

    --white:    #ffffff;
    --red:      #c0392b;
    --red-bg:   #fef7f6;
    --green:    #2d6a4f;
    --green-bg: #f3f9f5;
    --blue:     #2563a0;
    --blue-bg:  #f5f8fc;
    --orange:   #c2701e;
    --orange-bg:#fef9f3;

    --radius:     10px;
    --radius-sm:  6px;
    --radius-xs:  4px;
    --shadow-sm:  0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.03);
    --shadow:     0 1px 3px rgba(0,0,0,0.05), 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md:  0 4px 16px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
    --shadow-lg:  0 8px 32px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);

    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --transition: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font);
    background: var(--steel-50);
    color: var(--steel-900);
    line-height: 1.55;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── Sidebar ────────────────────────────────────────────────── */
.sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: var(--sidebar-w);
    background: linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 100%);
    color: #6b6560;
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
    border-right: 1px solid #d9d4cc;
}

.sidebar-logo {
    padding: 28px 22px 22px;
    border-bottom: 1px solid #d9d4cc;
}

.sidebar-logo img {
    height: 28px;
    width: auto;
    display: block;
    filter: brightness(0.3);
}

.sidebar-tagline {
    font-size: 8.5px;
    letter-spacing: 3px;
    color: #a09890;
    margin-top: 6px;
    text-transform: uppercase;
    font-weight: 600;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 11px 22px;
    margin: 1px 10px;
    font-size: 13px;
    font-weight: 450;
    letter-spacing: 0.2px;
    color: #6b6560;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    position: relative;
}

.sidebar-nav a:hover {
    background: rgba(0,0,0,0.04);
    color: #3d3834;
}

.sidebar-nav a.active {
    color: #2d2824;
    background: var(--navy-700);
    font-weight: 550;
}

.sidebar-nav a.active::before {
    content: '';
    position: absolute;
    left: 0; top: 8px; bottom: 8px;
    width: 3px;
    background: var(--amber);
    border-radius: 0 3px 3px 0;
}

.sidebar-nav a .nav-icon {
    width: 20px;
    text-align: center;
    font-size: 15px;
    opacity: 0.8;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 16px 22px;
    border-top: 1px solid #d9d4cc;
    font-size: 10.5px;
    color: #a09890;
    letter-spacing: 0.5px;
}

/* ── Main Layout ────────────────────────────────────────────── */
.main-wrapper {
    margin-left: var(--sidebar-w);
    min-height: 100vh;
    background: var(--steel-50);
}

/* ── Top Bar ────────────────────────────────────────────────── */
.topbar {
    height: var(--topbar-h);
    background: var(--white);
    border-bottom: 1px solid var(--steel-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 36px;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}

.topbar-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--steel-900);
    letter-spacing: -0.1px;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 18px;
}

.topbar-user {
    font-size: 13px;
    color: var(--steel-500);
    display: flex;
    align-items: center;
    gap: 8px;
}

.topbar-user strong {
    color: var(--steel-900);
    font-weight: 600;
}

.topbar-role {
    font-size: 10.5px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    letter-spacing: 0.3px;
    background: var(--steel-100);
    color: var(--steel-500);
}

.topbar-role.admin {
    background: var(--navy-950);
    color: #5b5550;
}

.btn-logout {
    background: none;
    border: 1px solid var(--steel-300);
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    color: var(--steel-500);
    transition: all var(--transition);
    font-family: var(--font);
}

.btn-logout:hover {
    border-color: var(--red);
    color: var(--red);
    background: var(--red-bg);
}

/* ── Language Switcher ──────────────────────────────────────── */
.lang-switcher {
    display: flex;
    margin-right: 4px;
    border: 1px solid var(--steel-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.lang-btn {
    background: var(--white);
    border: none;
    padding: 5px 10px;
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 0.4px;
    cursor: pointer;
    color: var(--steel-400);
    transition: all var(--transition);
    font-family: var(--font);
    border-right: 1px solid var(--steel-200);
}

.lang-btn:last-child { border-right: none; }

.lang-btn:hover {
    background: var(--steel-50);
    color: var(--steel-700);
}

.lang-btn.active {
    background: var(--amber);
    color: #fff;
    border-right-color: var(--amber);
}

/* ── Content Area ───────────────────────────────────────────── */
.content {
    padding: 32px 36px;
    max-width: 1480px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 22px;
    font-weight: 650;
    color: var(--steel-900);
    letter-spacing: -0.2px;
}

/* ── Cards ──────────────────────────────────────────────────── */
.card {
    background: var(--white);
    border: 1px solid var(--steel-200);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}

.card:hover {
    box-shadow: var(--shadow);
}

.card + .card { margin-top: 18px; }

.card-header {
    font-size: 14.5px;
    font-weight: 650;
    color: var(--steel-900);
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--steel-100);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── Stat Cards ─────────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--white);
    border: 1px solid var(--steel-200);
    border-radius: var(--radius);
    padding: 22px 26px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: all var(--transition);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 4px;
    background: var(--steel-300);
    transition: background var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.stat-card.success::before { background: var(--green); }
.stat-card.warning::before { background: var(--amber); }
.stat-card.danger::before  { background: var(--red); }

.stat-card .stat-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--steel-400);
    margin-bottom: 8px;
    font-weight: 600;
}

.stat-card .stat-value {
    font-size: 34px;
    font-weight: 700;
    letter-spacing: -1.5px;
    color: var(--steel-900);
    line-height: 1;
}

.stat-card.danger .stat-value  { color: var(--red); }
.stat-card.warning .stat-value { color: var(--amber); }
.stat-card.success .stat-value { color: var(--green); }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 20px;
    font-size: 13px;
    font-weight: 530;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    letter-spacing: 0.2px;
    transition: all var(--transition);
    font-family: var(--font);
    white-space: nowrap;
}

.btn-primary {
    background: var(--amber);
    color: #fff;
    border-color: var(--amber);
    font-weight: 560;
}

.btn-primary:hover {
    background: var(--amber-hover);
    border-color: var(--amber-hover);
    box-shadow: 0 2px 8px rgba(200,125,43,0.25);
}

.btn-outline {
    background: var(--white);
    color: var(--steel-700);
    border-color: var(--steel-300);
}

.btn-outline:hover {
    background: var(--steel-50);
    border-color: var(--steel-400);
}

.btn-danger {
    background: var(--white);
    color: var(--red);
    border-color: #e8cccc;
}

.btn-danger:hover {
    background: var(--red-bg);
    border-color: var(--red);
}

.btn-success {
    background: var(--green);
    color: #fff;
    border-color: var(--green);
    font-weight: 560;
}

.btn-success:hover {
    background: #225a3e;
    box-shadow: 0 2px 8px rgba(45,106,79,0.25);
}

.btn-sm { padding: 5px 13px; font-size: 11.5px; border-radius: var(--radius-xs); }
.btn-lg { padding: 12px 28px; font-size: 14.5px; }

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

/* ── Forms ──────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }

.form-group label {
    display: block;
    font-size: 11.5px;
    font-weight: 650;
    text-transform: uppercase;
    letter-spacing: 0.7px;
    color: var(--steel-500);
    margin-bottom: 6px;
}

.form-input, .form-select {
    width: 100%;
    padding: 10px 13px;
    font-size: 13.5px;
    border: 1px solid var(--steel-300);
    border-radius: var(--radius-sm);
    background: var(--white);
    font-family: var(--font);
    transition: all var(--transition);
    color: var(--steel-900);
}

.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--amber);
    box-shadow: 0 0 0 3px rgba(200,125,43,0.08);
}

.form-input.error { border-color: var(--red); }
.form-error { font-size: 12px; color: var(--red); margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

/* ── Tables ─────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

thead th {
    text-align: left;
    padding: 13px 16px;
    font-size: 10.5px;
    font-weight: 650;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--steel-400);
    border-bottom: 2px solid var(--steel-200);
    background: var(--steel-50);
    white-space: nowrap;
}

tbody td {
    padding: 13px 16px;
    border-bottom: 1px solid var(--steel-100);
    vertical-align: middle;
    color: var(--steel-900);
}

tbody tr:nth-child(even) {
    background: #fcfbfa;
}

tbody tr:hover {
    background: var(--amber-pale);
}

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 11px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.2px;
    line-height: 1.4;
}

.badge-success { background: var(--green-bg); color: var(--green); }
.badge-warning { background: var(--orange-bg); color: var(--orange); }
.badge-danger  { background: var(--red-bg);   color: var(--red); }
.badge-info    { background: var(--blue-bg);  color: var(--blue); }

/* ── Alerts ─────────────────────────────────────────────────── */
.alert {
    padding: 13px 18px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    line-height: 1.45;
    font-weight: 450;
}

.alert-error   { background: var(--red-bg);    color: var(--red);    border: 1px solid #f0d0d0; }
.alert-success { background: var(--green-bg);  color: var(--green);  border: 1px solid #c8e0d2; }
.alert-warning { background: var(--orange-bg); color: var(--orange); border: 1px solid #f0dcc0; }

/* ── Drop Zone ──────────────────────────────────────────────── */
.dropzone {
    border: 2px dashed var(--steel-300);
    border-radius: var(--radius);
    padding: 44px 32px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    background: #fcfbfa;
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--amber);
    background: var(--amber-light);
    box-shadow: inset 0 0 0 1px rgba(200,125,43,0.08);
}

.dropzone-icon { font-size: 38px; margin-bottom: 10px; opacity: 0.3; }
.dropzone-text { font-size: 14.5px; font-weight: 530; color: var(--steel-700); margin-bottom: 4px; }
.dropzone-hint { font-size: 12px; color: var(--steel-400); }

/* ── Preview Table Rows ─────────────────────────────────────── */
.preview-matched      { border-left: 3px solid var(--green); }
.preview-unmatched    { border-left: 3px solid var(--orange); }
.preview-insufficient { border-left: 3px solid var(--red); }

/* ── Modal ──────────────────────────────────────────────────── */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15,26,37,0.5);
    backdrop-filter: blur(2px);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 34px;
    width: 92%;
    max-width: 540px;
    max-height: 85vh;
    overflow-y: auto;
    animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.96) translateY(8px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal h3 {
    font-size: 18px;
    font-weight: 650;
    color: var(--steel-900);
    margin-bottom: 22px;
}

.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 26px;
}

/* ── Search bar ─────────────────────────────────────────────── */
.search-bar { display: flex; gap: 10px; align-items: center; }
.search-bar .form-input { max-width: 380px; }

/* ── Tabs ───────────────────────────────────────────────────── */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--steel-200);
}

.tab-btn {
    padding: 11px 24px;
    font-size: 13.5px;
    font-weight: 510;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    color: var(--steel-400);
    transition: all var(--transition);
    font-family: var(--font);
    margin-bottom: -1px;
}

.tab-btn:hover { color: var(--steel-700); }

.tab-btn.active {
    color: var(--amber);
    border-bottom-color: var(--amber);
    font-weight: 580;
}

/* ── Two-column layout ──────────────────────────────────────── */
.two-col {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 24px;
    align-items: start;
}

/* ── Login Page ─────────────────────────────────────────────── */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(200,125,43,0.04) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(15,26,37,0.03) 0%, transparent 50%),
        var(--steel-50);
}

.auth-card {
    width: 420px;
    background: var(--white);
    border-radius: 14px;
    box-shadow: var(--shadow-lg);
    padding: 52px 46px;
    border: 1px solid var(--steel-200);
}

.auth-logo {
    text-align: center;
    margin-bottom: 36px;
}

.auth-logo img { height: 38px; width: auto; }

.auth-card h2 {
    font-size: 22px;
    font-weight: 650;
    text-align: center;
    margin-bottom: 30px;
    color: var(--steel-900);
    letter-spacing: -0.2px;
}

.auth-card .btn {
    width: 100%;
    justify-content: center;
    padding: 12px;
    font-size: 14.5px;
}

.auth-link {
    text-align: center;
    font-size: 13px;
    color: var(--steel-400);
    margin-top: 22px;
}

.auth-link a {
    color: var(--amber);
    font-weight: 530;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ── Empty State ────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 56px 20px;
    color: var(--steel-400);
}

.empty-state .empty-icon { font-size: 44px; opacity: 0.18; margin-bottom: 14px; }

/* ── Result Summary ─────────────────────────────────────────── */
.result-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 20px;
}

.result-item {
    text-align: center;
    padding: 18px 16px;
    border-radius: var(--radius-sm);
    background: var(--steel-50);
    border: 1px solid var(--steel-100);
    transition: all var(--transition);
}

.result-item:hover { background: var(--white); box-shadow: var(--shadow-sm); }

.result-item .result-num { font-size: 28px; font-weight: 700; letter-spacing: -0.5px; }
.result-item .result-label {
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--steel-400);
    margin-top: 4px;
    font-weight: 600;
}

/* ── Loading ────────────────────────────────────────────────── */
.spinner {
    display: inline-block;
    width: 22px; height: 22px;
    border: 2.5px solid var(--steel-200);
    border-top-color: var(--amber);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Analytics extra spacing ───────────────────────────────── */
#chartsArea .card { margin-bottom: 0; }

/* ── Mobile Hamburger Button ──────────────────────────────────── */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    padding: 4px 8px;
    color: var(--steel-700);
    margin-right: 8px;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
    :root {
        --sidebar-w: 0;
        --topbar-h: 52px;
    }

    /* Sidebar → overlay */
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        box-shadow: none;
        width: 260px;
        z-index: 300;
    }
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0,0,0,0.3);
    }

    /* Overlay when sidebar is open */
    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.35);
        z-index: 299;
    }
    .sidebar-overlay.show { display: block; }

    .main-wrapper { margin-left: 0; }

    /* Hamburger */
    .menu-toggle { display: inline-flex; align-items: center; }

    /* Topbar */
    .topbar {
        padding: 0 12px;
        gap: 8px;
    }
    .topbar-title {
        font-size: 14px;
        flex: 1;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .topbar-right { gap: 8px; }
    .topbar-user strong { max-width: 60px; display: inline-block; overflow: hidden; text-overflow: ellipsis; vertical-align: middle; }
    .topbar-role { display: none; }
    .btn-logout { padding: 5px 10px; font-size: 11px; }

    /* Content */
    .content { padding: 14px 10px; }

    /* Grid layouts → stack */
    .two-col { grid-template-columns: 1fr; gap: 14px; }
    .form-row { grid-template-columns: 1fr; gap: 10px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .result-summary { grid-template-columns: repeat(3, 1fr); gap: 6px; }

    /* Cards */
    .card { padding: 16px 12px; border-radius: 8px; }
    .card + .card { margin-top: 12px; }
    .card-header { font-size: 13px; margin-bottom: 12px; padding-bottom: 10px; }

    /* Stat cards */
    .stat-card { padding: 14px 16px; }
    .stat-card .stat-value { font-size: 24px; }
    .stat-card .stat-label { font-size: 10px; letter-spacing: 0.6px; }
    .stat-card::before { width: 3px; }

    /* Tables */
    table { font-size: 11.5px; }
    thead th { padding: 8px 10px; font-size: 9.5px; letter-spacing: 0.3px; }
    tbody td { padding: 8px 10px; }

    /* Buttons */
    .btn { padding: 8px 14px; font-size: 12px; }
    .btn-lg { padding: 10px 20px; font-size: 13px; width: 100%; }
    .btn-sm { padding: 4px 10px; font-size: 10.5px; }

    /* Forms */
    .form-group { margin-bottom: 12px; }
    .form-input, .form-select { padding: 10px 12px; font-size: 16px; } /* 16px prevents iOS zoom */
    .form-group label { font-size: 10.5px; letter-spacing: 0.4px; }

    /* Tabs */
    .tab-btn { padding: 8px 14px; font-size: 12px; }

    /* Search */
    .search-bar { flex-wrap: wrap; }
    .search-bar .form-input { max-width: 100%; flex: 1; }

    /* Dropzone */
    .dropzone { padding: 28px 16px; }
    .dropzone-text { font-size: 13px; }

    /* Modal */
    .modal { padding: 20px 16px; width: 96%; max-width: 96%; }
    .modal h3 { font-size: 16px; }
    .modal-actions { flex-direction: column; }
    .modal-actions .btn { width: 100%; }

    /* Login */
    .auth-card { width: 92%; padding: 32px 22px; }
    .auth-card h2 { font-size: 18px; }
    .auth-logo img { height: 30px; }

    /* Badges */
    .badge { padding: 3px 8px; font-size: 10px; }

    /* Language switcher */
    .lang-switcher { margin-right: 2px; }
    .lang-btn { padding: 4px 7px; font-size: 10px; }

    /* Charts area */
    #chartsArea > div { grid-template-columns: 1fr !important; }

    /* Alerts */
    .alert { padding: 10px 14px; font-size: 12px; }

    /* Page header */
    .page-header { flex-wrap: wrap; gap: 8px; }
    .page-header h1 { font-size: 18px; }

    /* Result items */
    .result-item { padding: 10px 8px; }
    .result-item .result-num { font-size: 20px; }
    .result-item .result-label { font-size: 9px; }
}