:root {
    --bg: #0f172a;
    --panel: #1e293b;
    --accent: #38bdf8;
    --accent-dark: #0ea5e9;
    --text: #f8fafc;
    --muted: #94a3b8;
    --danger: #f87171;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font, "Inter", system-ui);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 0.5rem;
    background: var(--panel);
    color: var(--text);
    cursor: pointer;
    text-decoration: none;
}

.btn.primary {
    background: var(--accent);
    color: #0f172a;
    font-weight: 600;
}

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

.alert {
    padding: 0.8rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.alert-error {
    background: rgba(248, 113, 113, 0.2);
    color: #fecaca;
}

.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    background: var(--panel);
    padding: 2rem;
    border-radius: 1rem;
    width: min(400px, 90vw);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

.login-card h1 {
    margin-top: 0;
}

.form-stacked {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-stacked input {
    width: 100%;
    padding: 0.6rem;
    border-radius: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(15, 23, 42, 0.6);
    color: var(--text);
}

.pos-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(15, 23, 42, 0.6);
    position: sticky;
    top: 0;
    backdrop-filter: blur(12px);
    z-index: 10;
}

.pos-layout {
    display: grid;
    grid-template-columns: 2fr 1.2fr 0.8fr;
    gap: 1.5rem;
    padding: 1.5rem;
}

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

.panel {
    background: var(--panel);
    border-radius: 1rem;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 70vh;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
}

.product-tile {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: 0.75rem;
    color: var(--text);
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    padding: 0.8rem;
    cursor: pointer;
    min-height: 120px;
}

.product-tile .name {
    font-weight: 600;
}

.product-tile .price {
    font-size: 1.1rem;
}

.product-tile .stock {
    color: var(--muted);
    font-size: 0.85rem;
}

.product-tile:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.cart table {
    width: 100%;
    border-collapse: collapse;
}

.cart th, .cart td {
    padding: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.cart button {
    border: none;
    background: none;
    color: var(--danger);
    cursor: pointer;
}

.cart-actions {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.cart-actions .ghost {
    background: rgba(56, 189, 248, 0.15);
    color: var(--text);
    border-radius: 0.35rem;
    padding: 0.15rem 0.35rem;
}

.cart-actions button[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
}

.cart-totals {
    display: flex;
    justify-content: space-between;
    font-size: 1.2rem;
    font-weight: 600;
}

.order-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.order-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1rem;
    border-radius: 0.85rem;
    background: rgba(15, 23, 42, 0.75);
    border: 1px solid rgba(56, 189, 248, 0.18);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    transition: border-color 0.2s ease, transform 0.15s ease;
}

.order-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
}

.order-item strong {
    display: block;
    font-size: 1rem;
}

.muted {
    display: block;
    color: var(--muted);
    font-size: 0.9rem;
}

.drag-handle {
    font-size: 1.4rem;
    cursor: grab;
    color: var(--muted);
    padding: 0.2rem 0.4rem;
    border-radius: 0.5rem;
    background: rgba(148, 163, 184, 0.15);
}

.order-list li.dragging {
    opacity: 0.45;
    transform: scale(0.99);
}

.order-list li.drop-target {
    border-color: var(--accent);
}

.order-actions {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

#order-message {
    min-height: 1.5rem;
}

.keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.quantity-display {
    font-size: 1.4rem;
    font-weight: 600;
}

.keypad button {
    padding: 1rem;
    font-size: 1.5rem;
    border-radius: 0.75rem;
    border: none;
    background: rgba(56, 189, 248, 0.1);
    color: var(--text);
    cursor: pointer;
}

.keypad button.danger {
    background: rgba(248, 113, 113, 0.2);
}

.payment {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.payment select {
    padding: 0.6rem;
    border-radius: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(15, 23, 42, 0.6);
    color: var(--text);
}

#checkout-message {
    min-height: 1.5rem;
}

.manager-links {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.panel-heading {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
}

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

.report-controls {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.report-controls label {
    display: flex;
    flex-direction: column;
    font-size: 0.9rem;
    gap: 0.3rem;
}

.report-controls input {
    padding: 0.5rem 0.7rem;
    border-radius: 0.6rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(15, 23, 42, 0.6);
    color: var(--text);
}

.report-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
}

.stat-card {
    padding: 0.9rem;
    border-radius: 0.9rem;
    background: rgba(15, 23, 42, 0.75);
    border: 1px solid rgba(56, 189, 248, 0.15);
}

.stat-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.85rem;
}

.stat-card h3 {
    margin: 0.3rem 0 0;
    font-size: 1.6rem;
}

.report-flex {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.report-block {
    flex: 1 1 320px;
    background: rgba(15, 23, 42, 0.55);
    border: 1px solid rgba(56, 189, 248, 0.1);
    border-radius: 0.85rem;
    padding: 1rem;
}

.report-block h3 {
    margin-top: 0;
}

.table-scroll {
    width: 100%;
    overflow-x: auto;
}

.table-scroll table {
    width: 100%;
    border-collapse: collapse;
}

.table-scroll th,
.table-scroll td {
    text-align: left;
    padding: 0.65rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.table-scroll th {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
}

@media (max-width: 1200px) {
    .pos-layout {
        grid-template-columns: 1fr;
    }

    .panel-heading {
        flex-direction: column;
    }
}