:root {
    --bg: #f5f7fb;
    --ink: #172033;
    --muted: #6c7585;
    --line: #dfe5ee;
    --panel: #ffffff;
    --primary: #0d6efd;
    --sidebar: #111827;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: Tahoma, Arial, sans-serif;
}

a {
    text-decoration: none;
}

.app-shell {
    min-height: 100vh;
}

.sidebar {
    background: var(--sidebar);
    color: #fff;
    padding: 14px;
}

.brand {
    display: block;
    color: #fff;
    font-weight: 700;
    padding: 10px 12px 16px;
}

.sidebar .nav-link {
    color: rgba(255,255,255,.78);
    border-radius: 8px;
    padding: 10px 12px;
}

.sidebar .nav-link.active,
.sidebar .nav-link:hover {
    background: rgba(255,255,255,.12);
    color: #fff;
}

.app-main {
    min-width: 0;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 12px 16px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.content-wrap {
    padding: 16px;
}

.page-heading {
    margin-bottom: 16px;
}

.page-heading h1 {
    font-size: 1.55rem;
    margin: 0 0 4px;
}

.page-heading p {
    color: var(--muted);
    margin: 0;
}

.panel,
.dash-card,
.metric,
.barcode-panel,
.pos-total-bar {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.panel {
    padding: 16px;
}

.panel h2 {
    font-size: 1.1rem;
    margin-bottom: 14px;
}

.dash-card {
    display: block;
    min-height: 116px;
    padding: 18px;
    color: var(--ink);
    transition: transform .15s ease, border-color .15s ease;
}

.dash-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.dash-card span {
    display: block;
    font-weight: 700;
    font-size: 1.08rem;
    margin-bottom: 8px;
}

.dash-card small,
.metric span {
    color: var(--muted);
}

.metric {
    padding: 18px;
}

.metric strong {
    display: block;
    font-size: 1.5rem;
    margin-top: 6px;
}

.login-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 18px;
    background: #eef3f9;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 24px;
}

.barcode-panel {
    padding: 16px;
}

.barcode-input {
    min-height: 62px;
    font-size: 1.45rem;
    font-weight: 700;
}

.qty-input {
    width: 86px;
}

.pos-total-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
    margin-top: 14px;
    position: sticky;
    bottom: 0;
    box-shadow: 0 -10px 24px rgba(20,30,50,.08);
}

.pos-total-bar strong {
    display: block;
    font-size: 1.35rem;
}

.pos-total-bar label,
.pos-total-bar span {
    display: block;
    color: var(--muted);
    font-size: .9rem;
}

.settings-panel {
    max-width: 620px;
}

.display-price {
    font-size: 2rem;
    font-weight: 800;
    color: #0f766e;
    margin: 8px 0 4px;
}

.price-result h2 {
    margin-bottom: 0;
}

.day-report {
    max-width: 760px;
}

.receipt-body {
    background: #fff;
}

.receipt {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    padding: 18px;
}

.receipt-totals {
    border-top: 1px dashed #999;
    padding-top: 10px;
}

.receipt-totals div {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
}

@media (min-width: 992px) {
    .app-shell {
        display: grid;
        grid-template-columns: 250px minmax(0, 1fr);
    }

    .sidebar {
        min-height: 100vh;
        position: sticky;
        top: 0;
        align-self: start;
    }

    .content-wrap {
        padding: 24px;
    }

    .pos-total-bar {
        grid-template-columns: 1fr 220px 1fr 220px;
        align-items: end;
    }
}

@media print {
    body {
        background: #fff;
    }

    .d-print-none,
    .btn {
        display: none !important;
    }

    .receipt {
        max-width: none;
        padding: 0;
    }

    .table {
        font-size: 12px;
    }
}