*, *::before, *::after { box-sizing: border-box; }

:root {
    --bg: #0f172a;
    --panel: #1e293b;
    --panel-2: #273449;
    --border: #334155;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --accent: #22c55e;
    --accent-hover: #16a34a;
    --danger: #ef4444;
    --warn: #f59e0b;
    --shadow: 0 10px 30px rgba(0,0,0,0.35);
    --radius: 10px;
}

html, body {
    height: 100%;
    margin: 0;
    background: linear-gradient(180deg, #0b1220 0%, #0f172a 100%);
    color: var(--text);
    font: 15px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

kbd {
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 6px;
    font-family: inherit;
    font-size: 12px;
}

button { font: inherit; color: inherit; }

.pos {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ─── Header ────────────────────────────────────────────── */
.top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: rgba(15, 23, 42, 0.85);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(6px);
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
    width: 44px; height: 44px; border-radius: 10px;
    background: linear-gradient(135deg, #22c55e, #0891b2);
    color: white;
    display: grid; place-items: center;
    font-weight: 800;
    letter-spacing: 0.5px;
}
.store { font-weight: 700; font-size: 18px; }
.subtitle { color: var(--muted); font-size: 12px; }
.meta { text-align: right; }
.cashier { color: var(--muted); font-size: 12px; }
.clock { font-family: "SF Mono", ui-monospace, Menlo, monospace; font-size: 18px; font-weight: 600; }

/* ─── Grid layout ───────────────────────────────────────── */
.grid {
    flex: 1;
    display: grid;
    grid-template-columns: 320px 1fr 300px;
    gap: 16px;
    padding: 16px;
    min-height: 0;
}
@media (max-width: 1024px) {
    .grid { grid-template-columns: 280px 1fr; }
    .totals-col { grid-column: 1 / -1; }
}

/* ─── Scan column ───────────────────────────────────────── */
.scan-col { display: flex; flex-direction: column; gap: 16px; }

.scan-card, .manual-card, .cart-card, .totals-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.scan-card { padding: 16px; }
.scan-label {
    display: block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--muted);
    margin-bottom: 8px;
}
#scan-input {
    width: 100%;
    padding: 14px 14px;
    background: #0b1220;
    border: 2px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: "SF Mono", ui-monospace, Menlo, monospace;
    font-size: 20px;
    letter-spacing: 1px;
    outline: none;
    transition: border-color .12s;
}
#scan-input:focus { border-color: var(--accent); }
.hint { margin-top: 8px; color: var(--muted); font-size: 12px; }

.last-scan {
    margin-top: 14px;
    padding: 10px 12px;
    background: var(--panel-2);
    border-left: 3px solid var(--accent);
    border-radius: 6px;
}
.ls-title {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 4px;
}
.ls-name { font-weight: 600; }
.ls-meta { color: var(--muted); font-size: 12px; }
.ls-price { font-weight: 700; margin-top: 2px; }

.manual-card { padding: 16px; }
.manual-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--muted);
    margin-bottom: 10px;
}
.manual-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}
.manual-grid button {
    padding: 14px;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    transition: background .1s;
}
.manual-grid button:hover { background: #334a6a; }
.manual-grid button:active { background: #3e5578; }
.k-back { color: var(--warn); }
.k-enter { color: var(--accent); }

/* ─── Cart ──────────────────────────────────────────────── */
.cart-col { display: flex; flex-direction: column; min-height: 0; }
.cart-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.cart-head, .cart-row {
    display: grid;
    grid-template-columns: 1fr 60px 90px 90px 40px;
    gap: 8px;
    align-items: center;
    padding: 10px 16px;
}
.cart-head {
    background: var(--panel-2);
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--border);
}
.c-qty, .c-price, .c-line { text-align: right; }
.cart-body { flex: 1; overflow-y: auto; }
.cart-row { border-bottom: 1px solid rgba(255,255,255,0.04); animation: pop .2s ease; }
.cart-row .name { font-weight: 600; }
.cart-row .meta { color: var(--muted); font-size: 12px; }
.cart-row .qty-wrap {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    justify-content: flex-end;
}
.qty-btn {
    width: 24px; height: 24px;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    font-weight: 700;
}
.qty-btn:hover { background: #3e5578; }
.remove-btn {
    background: transparent;
    border: none;
    color: var(--muted);
    cursor: pointer;
    font-size: 16px;
}
.remove-btn:hover { color: var(--danger); }
.cart-empty { padding: 40px 16px; text-align: center; color: var(--muted); }

@keyframes pop {
    from { background: rgba(34, 197, 94, 0.15); }
    to   { background: transparent; }
}

/* ─── Totals ────────────────────────────────────────────── */
.totals-card { padding: 16px; }
.totals .row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    color: var(--muted);
}
.totals .row.total {
    color: var(--text);
    font-size: 22px;
    font-weight: 800;
    border-top: 1px solid var(--border);
    margin-top: 6px;
    padding-top: 12px;
}
.actions {
    display: grid;
    gap: 8px;
    margin-top: 14px;
}

.btn {
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--panel-2);
    cursor: pointer;
    font-weight: 600;
    transition: background .1s, border-color .1s;
}
.btn:hover:not(:disabled) { background: #334a6a; }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-ghost { background: transparent; }

/* ─── Toast ─────────────────────────────────────────────── */
.toast {
    position: fixed;
    left: 50%;
    bottom: 24px;
    transform: translateX(-50%);
    background: var(--danger);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    z-index: 100;
}

/* ─── Modal / dialog ────────────────────────────────────── */
dialog.modal {
    border: 1px solid var(--border);
    background: var(--panel);
    color: var(--text);
    border-radius: var(--radius);
    padding: 0;
    box-shadow: var(--shadow);
    max-width: 520px;
    width: calc(100% - 32px);
}
dialog.modal::backdrop {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
}
.modal-body { padding: 20px; }
.modal-body h2 { margin: 0 0 14px; font-size: 20px; }
.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin: 16px 0 0;
    padding: 0;
}

.tenders {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}
.tender {
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px 10px;
    cursor: pointer;
    text-align: center;
    font-weight: 600;
    transition: background .1s;
}
.tender:hover { background: #334a6a; border-color: var(--accent); }
.t-icon { font-size: 32px; margin-bottom: 4px; }

/* ─── Receipt ───────────────────────────────────────────── */
.receipt-modal { max-width: 380px; }
.receipt {
    background: #f8fafc;
    color: #0f172a;
    padding: 20px;
    border-radius: 6px;
    font-family: "SF Mono", ui-monospace, Menlo, monospace;
    font-size: 13px;
    line-height: 1.5;
}
.receipt h3 {
    margin: 0;
    text-align: center;
    font-size: 16px;
}
.receipt .r-sub { text-align: center; font-size: 11px; margin-bottom: 10px; color: #475569; }
.receipt hr { border: none; border-top: 1px dashed #94a3b8; margin: 8px 0; }
.receipt .r-row { display: flex; justify-content: space-between; }
.receipt .r-line { margin-bottom: 4px; }
.receipt .r-qty { color: #475569; font-size: 11px; }
.receipt .r-total { font-weight: 700; font-size: 16px; }
.receipt .r-thanks { text-align: center; margin-top: 12px; font-size: 11px; }

@media print {
    body > *:not(#receipt-modal) { display: none !important; }
    #receipt-modal {
        position: static !important;
        border: none !important;
        background: white !important;
        box-shadow: none !important;
        max-width: none !important;
        width: auto !important;
    }
    #receipt-modal::backdrop { display: none !important; }
    .modal-actions { display: none !important; }
    .receipt { background: white; box-shadow: none; border: none; padding: 0; }
}