/* ─── Billing Page Styles ─────────────────────────────────────
   Owner: pages/billing/billing.css
   Wave 8 / PR-308-C1 (Billing page migration)
   Rule: Shell layout + billing-specific patterns only.
   Rule: Component styles live in component CSS — NOT here.
   Rule: Zero hardcoded colors — all via --mr-* tokens.
   ─────────────────────────────────────────────────────────── */

/* ── Two-column layout ───────────────────────────────────── */
.mr-billing-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.35fr);
  gap: var(--mr-space-lg);
  align-items: start;
}

/* ── Left card: cart area ────────────────────────────────── */
.billing-cart-zone {
  /* mr-card provides bg/border/radius — this adds cart-specific overflow */
  padding: var(--mr-space-lg) !important;
}

/* ── Search bar row ─────────────────────────────────────── */
.billing-search-zone {
  margin-bottom: var(--mr-space-md);
}

.billing-search-row {
  display: flex;
  gap: var(--mr-space-xs);
  align-items: center;
}

.billing-search-row .mr-btn {
  flex-shrink: 0;
  height: 44px;   /* Touch target ≥44px — DESIGN-PRINCIPLES.md §9 */
  padding: 0 var(--mr-space-md);
}

.billing-search-input-wrap {
  flex: 1;
  position: relative;
}

.billing-search-input-wrap .mr-input {
  padding-left: 2rem;
  height: 44px;
  font-size: 14px;
}

.billing-search-input-wrap .ic {
  position: absolute;
  left: var(--mr-space-sm);
  top: 50%;
  transform: translateY(-50%);
  color: var(--mr-text-muted);
  pointer-events: none;
  font-size: 14px;
  z-index: 1;
}

/* ── Cart table wrapper ─────────────────────────────────── */
.billing-cart-table-wrap {
  max-height: calc(100vh - 280px);
  overflow-y: auto;
  min-height: 120px;
  border: none !important;  /* Contained inside .billing-cart-zone card */
  border-radius: 0 !important;
}

.billing-cart-table {
  /* inherits mr-table styles */
}

/* ── Cart empty state ───────────────────────────────────── */
.billing-empty-cart {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--mr-space-xs);
  padding: var(--mr-space-2xl) var(--mr-space-xl);
  text-align: center;
}

.billing-empty-cart__icon {
  font-size: 2rem;
  line-height: 1;
  opacity: 0.6;
}

.billing-empty-cart__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--mr-text-secondary);
}

.billing-empty-cart__body {
  font-size: 12px;
  color: var(--mr-text-muted);
}

/* ── Right card: checkout panel ─────────────────────────── */
.billing-checkout-zone {
  position: sticky;
  top: calc(var(--mr-topbar-height) + var(--mr-space-md));
  padding: var(--mr-space-md) var(--mr-space-lg) !important;
  display: flex;
  flex-direction: column;
  gap: var(--mr-space-sm);
}

.billing-checkout-label {
  margin-bottom: var(--mr-space-xs);
  font-size: 13px !important;
  text-transform: none !important;
  letter-spacing: 0 !important;
  font-weight: 600;
  color: var(--mr-text);
}

/* ── Form rows ──────────────────────────────────────────── */
.billing-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--mr-space-sm);
}

.billing-form-row .mr-field__label {
  font-size: 11px;
}

.billing-invisible-label {
  visibility: hidden;
}

/* ── Loyalty row ────────────────────────────────────────── */
.billing-loyalty-row {
  display: flex;
  align-items: center;
  gap: var(--mr-space-xs);
}

.billing-loyalty-row label {
  margin: 0;
  cursor: pointer;
}

.billing-points {
  font-size: 12px;
}

/* ── Subtotals bar ──────────────────────────────────────── */
.billing-subtotals {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--mr-space-sm) var(--mr-space-md);
  background: var(--mr-neutral-subtle);
  border-radius: var(--mr-radius-sm);
}

.billing-subtotals__right {
  text-align: right;
}

.billing-subtotal-val {
  font-weight: 600;
  color: var(--mr-text);
  font-size: 13px;
}

/* ── GST breakdown panel ────────────────────────────────── */
.billing-gst-breakdown {
  background: var(--mr-surface);
  border: 1px solid var(--mr-border);
  border-radius: var(--mr-radius-sm);
  padding: var(--mr-space-sm) var(--mr-space-md);
  font-size: 12px;
  color: var(--mr-text-secondary);
}

.billing-gst-row {
  display: flex;
  justify-content: space-between;
  line-height: 1.8;
}

.billing-gst-type {
  margin-top: var(--mr-space-xs);
  font-size: 11px;
  font-weight: 600;
  color: var(--mr-primary);
}

/* ── Grand total display ────────────────────────────────── */
.billing-total-display {
  background: var(--mr-primary);
  padding: var(--mr-space-sm) var(--mr-space-md);
  border-radius: var(--mr-radius-sm);
}

.billing-total-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.8);
}

.billing-total-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: var(--mr-leading-tight);
}

/* ── Action rows ────────────────────────────────────────── */
.billing-actions-primary {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  gap: var(--mr-space-xs);
  align-items: center;
}

.billing-actions-primary #printBtn {
  /* Checkout button — primary action, full span */
  min-height: 40px;
}

.billing-actions-secondary {
  display: flex;
  gap: var(--mr-space-xs);
}

.billing-actions-secondary .mr-btn {
  flex: 1;
  justify-content: center;
}

/* ── Mobile: single column ──────────────────────────────── */
@media (max-width: 767px) {
  .mr-billing-grid {
    grid-template-columns: 1fr;
  }

  .billing-checkout-zone {
    position: static;
  }

  .billing-cart-table-wrap {
    max-height: none;
  }

  .billing-actions-primary {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
  }

  .billing-actions-primary #printBtn {
    grid-column: 1 / -1;
    min-height: 48px;  /* Larger touch target on mobile */
  }

  .billing-search-row .mr-btn {
    height: 48px;
  }

  .billing-search-input-wrap .mr-input {
    height: 48px;
  }
}

/* ── Very small phones (375px) ──────────────────────────── */
@media (max-width: 375px) {
  .billing-form-row {
    grid-template-columns: 1fr;
  }

  .billing-actions-primary {
    grid-template-columns: 1fr;
  }

  .billing-actions-primary #printBtn {
    grid-column: 1;
    min-height: 52px;
  }

  .billing-actions-secondary {
    flex-direction: column;
  }
}