:root {
    --bg: #f3f4f6;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --surface-soft: #eef2f7;
    --line: #d8dee8;
    --line-strong: #c4ccd7;
    --text: #111827;
    --muted: #475569;
    --muted-soft: #64748b;
    --accent: #1f2937;
    --accent-soft: #334155;
    --warning: #b45309;
    --warning-bg: #fff7ed;
    --danger: #b91c1c;
    --shadow: 0 18px 50px rgba(15, 23, 42, 0.06);
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body.app-body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.5;
}

a {
    color: inherit;
}

.topbar {
    background: rgba(243, 244, 246, 0.92);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1030;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    text-decoration: none;
    color: var(--text);
}

.brand-mark:hover {
    color: var(--text);
}

.brand-mark__icon {
    width: 2.9rem;
    height: 2.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow);
    font-size: 1.1rem;
}

.user-chip {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 0.1rem;
    min-width: 8.5rem;
    padding: 0.65rem 0.9rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--line);
    background: var(--surface);
    font-size: 0.9rem;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: clamp(1.15rem, 2vw, 1.75rem);
}

.hero-panel,
.overview-panel,
.receipt-panel {
    padding: clamp(1.5rem, 3vw, 2.25rem);
}

.display-heading {
    font-size: clamp(2rem, 3vw, 2.75rem);
    line-height: 1.08;
    letter-spacing: -0.04em;
    margin: 0;
    font-weight: 700;
}

.section-title {
    margin: 0;
    font-size: 1.4rem;
    line-height: 1.2;
    font-weight: 700;
}

.lead-copy,
.section-copy {
    color: var(--muted);
    font-size: 1rem;
    max-width: 64ch;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 0.85rem;
    color: var(--muted-soft);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.78rem;
    font-weight: 700;
}

.status-dot {
    width: 0.8rem;
    height: 0.8rem;
    border-radius: 999px;
    background: #16a34a;
    box-shadow: 0 0 0 5px rgba(22, 163, 74, 0.15);
}

.instruction-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.instruction-card,
.mini-card,
.demo-user-card,
.compact-alert-card,
.product-card,
.cart-item,
.info-callout,
.integration-note,
.totals-box,
.empty-state,
.count-chip,
.quick-step,
.receipt-total-card,
.receipt-metadata > div {
    border: 1px solid var(--line);
    background: var(--surface-muted);
    border-radius: var(--radius-md);
}

.instruction-card {
    padding: 1rem;
}

.instruction-card span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    margin-bottom: 0.75rem;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
}

.instruction-card strong,
.mini-card strong,
.compact-alert-card strong {
    display: block;
    font-size: 1rem;
    margin-bottom: 0.35rem;
}

.instruction-card p,
.mini-card p,
.compact-alert-card small,
.integration-note,
.feature-list,
.empty-state p,
.info-callout p {
    margin: 0;
    color: var(--muted);
}

.feature-list {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 0.9rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
}

.feature-list i,
.mini-card i,
.compact-alert-card i {
    color: var(--accent-soft);
}

.integration-note,
.info-callout {
    padding: 1rem 1.1rem;
}

.mini-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.mini-grid.single-column {
    grid-template-columns: 1fr;
}

.mini-card {
    padding: 1rem;
}

.mini-card i {
    font-size: 1.15rem;
    display: inline-flex;
    margin-bottom: 0.65rem;
}

.stack-form {
    display: grid;
    gap: 1rem;
}

.demo-user-card {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 1rem;
    color: var(--text);
    text-decoration: none;
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
    box-shadow: 0 0 0 rgba(0, 0, 0, 0);
}

.demo-user-card:hover,
.demo-user-card:focus-visible,
.product-card:hover,
.product-card:focus-within {
    transform: translateY(-2px);
    border-color: var(--line-strong);
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.08);
}

.demo-role,
.demo-code {
    color: var(--muted-soft);
    font-size: 0.86rem;
}

.overview-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.metric-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 10rem;
}

.metric-card strong {
    font-size: clamp(1.8rem, 2vw, 2.25rem);
    line-height: 1;
    letter-spacing: -0.04em;
}

.metric-label {
    color: var(--muted-soft);
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    font-weight: 700;
}

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

.quick-step-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.quick-step {
    padding: 0.8rem 1rem;
    font-size: 0.95rem;
    color: var(--muted);
}

.alert-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border-color: #fed7aa;
    background: var(--warning-bg);
}

.search-shell {
    width: min(100%, 22rem);
}

.filter-toolbar {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.filter-toolbar .btn {
    min-height: 3rem;
    padding-inline: 1rem;
    border-radius: 999px;
    font-weight: 600;
}

.filter-toolbar .btn.is-active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.catalog-section__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.9rem;
}

.category-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.55rem 0.8rem;
    margin-bottom: 0.55rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: var(--surface-soft);
    font-size: 0.92rem;
    font-weight: 600;
}

.product-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    padding: 1rem;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.product-card__head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.icon-surface {
    width: 2.65rem;
    height: 2.65rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--surface);
    border: 1px solid var(--line);
    font-size: 1.05rem;
}

.stock-badge {
    padding: 0.3rem 0.65rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    color: #14532d;
    background: #ecfdf5;
    border: 1px solid #bbf7d0;
}

.stock-badge.is-low {
    color: var(--warning);
    background: var(--warning-bg);
    border-color: #fed7aa;
}

.product-card__body h3,
.cart-item h3 {
    margin: 0 0 0.35rem;
    font-size: 1.1rem;
    font-weight: 700;
}

.product-card__body p,
.cart-item p {
    margin: 0;
    color: var(--muted);
}

.product-card__footer {
    margin-top: 1.2rem;
}

.price-tag {
    font-size: 1.4rem;
    line-height: 1;
    letter-spacing: -0.04em;
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.btn-action,
.btn-lg {
    min-height: 3.35rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.cart-panel {
    position: sticky;
    top: 6.25rem;
}

.count-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 0.95rem;
    font-weight: 700;
    min-width: 5.7rem;
}

.cart-items {
    display: grid;
    gap: 0.9rem;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem;
}

.cart-item__controls,
.stock-actions {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    flex-wrap: wrap;
}

.qty-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.25rem;
    min-height: 2.25rem;
    padding: 0.3rem 0.6rem;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--line);
    font-weight: 700;
}

.totals-box {
    padding: 1rem 1.15rem;
}

.total-line {
    padding-top: 0.75rem;
    border-top: 1px solid var(--line);
}

.sales-table thead th,
.stock-table thead th,
.receipt-table thead th {
    font-size: 0.82rem;
    color: var(--muted-soft);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-bottom: 1px solid var(--line);
    padding-bottom: 0.9rem;
}

.sales-table tbody tr,
.stock-table tbody tr,
.receipt-table tbody tr {
    border-bottom: 1px solid rgba(216, 222, 232, 0.7);
}

.sales-table td,
.stock-table td,
.receipt-table td {
    padding-block: 1rem;
    vertical-align: middle;
}

.stock-figure {
    font-size: 1.05rem;
    font-weight: 700;
}

.row-alert {
    background: linear-gradient(0deg, rgba(255, 247, 237, 0.45), rgba(255, 247, 237, 0.45));
}

.compact-alert-card {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem;
}

.empty-state {
    display: grid;
    justify-items: center;
    gap: 0.5rem;
    text-align: center;
    padding: 2rem 1.25rem;
}

.empty-state.compact {
    padding-block: 1.5rem;
}

.empty-state i,
.empty-search-state i {
    font-size: 1.5rem;
    color: var(--accent-soft);
}

.empty-state strong,
.empty-search-state strong {
    font-size: 1rem;
}

.empty-search-state {
    border: 1px dashed var(--line-strong);
    border-radius: var(--radius-md);
    background: var(--surface-soft);
    text-align: center;
    padding: 2rem 1rem;
}

.site-footer {
    background: rgba(248, 250, 252, 0.9);
}

.receipt-body .panel {
    background: var(--surface);
}

.receipt-metadata {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.9rem;
}

.receipt-metadata > div,
.receipt-total-card {
    padding: 1rem;
}

.receipt-metadata span,
.receipt-total-card span {
    display: block;
    color: var(--muted-soft);
    font-size: 0.84rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.35rem;
}

.receipt-metadata strong,
.receipt-total-card strong {
    font-size: 1.08rem;
}

.receipt-total-card {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    background: var(--surface-soft);
}

.btn,
.form-control,
.input-group-text {
    border-radius: var(--radius-sm);
}

.form-control,
.input-group-text,
.btn-outline-secondary,
.btn-outline-danger,
.btn-outline-primary {
    border-color: var(--line-strong);
}

.form-control,
.input-group-text {
    min-height: 3.35rem;
    padding-inline: 1rem;
    font-size: 1rem;
    background: var(--surface);
}

.form-control:focus,
.btn:focus-visible,
.demo-user-card:focus-visible,
.product-card:focus-within {
    box-shadow: 0 0 0 0.2rem rgba(17, 24, 39, 0.15);
    border-color: var(--accent-soft);
    outline: none;
}

.btn-dark {
    background: var(--accent);
    border-color: var(--accent);
}

.btn-dark:hover,
.btn-dark:focus-visible {
    background: #0f172a;
    border-color: #0f172a;
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus-visible {
    background: #e2e8f0;
    color: var(--text);
    border-color: #cbd5e1;
}

.btn-outline-danger:hover,
.btn-outline-danger:focus-visible {
    background: #fef2f2;
    color: var(--danger);
    border-color: #fecaca;
}

.toast-container {
    z-index: 1085;
}

@media (max-width: 1199.98px) {
    .overview-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .overview-panel {
        grid-column: span 2;
    }

    .cart-panel {
        position: static;
    }
}

@media (max-width: 991.98px) {
    .instruction-grid,
    .mini-grid,
    .receipt-metadata,
    .receipt-total-card {
        grid-template-columns: 1fr;
    }

    .catalog-section__header,
    .alert-panel {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 767.98px) {
    .overview-grid {
        grid-template-columns: 1fr;
    }

    .overview-panel {
        grid-column: auto;
    }

    .cart-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .cart-item .text-end {
        width: 100%;
        text-align: left !important;
    }

    .cart-item__controls {
        justify-content: flex-start;
    }

    .brand-mark__icon {
        width: 2.5rem;
        height: 2.5rem;
    }
}

@media print {
    .topbar,
    .site-footer,
    .d-print-none,
    .toast-container {
        display: none !important;
    }

    body.app-body {
        background: #ffffff;
    }

    .panel,
    .receipt-panel {
        box-shadow: none;
        border-color: #d1d5db;
    }
}