:root {
  --bg: 239 240 236;
  --card: 255 255 255;
  --ink: 26 26 24;
  --muted: 124 122 114;
  --red: 220 56 56;
  --green: 43 138 84;
  --yellow: 244 195 42;
  --line: 0 0 0;

  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2.5rem 1.25rem;
  background: rgb(var(--bg));
  color: rgb(var(--ink));
  font-family: 'Manrope', system-ui, sans-serif;
}

.page {
  width: 100%;
  max-width: 460px;
}

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.page-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgb(var(--red));
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.page-title {
  font-size: 1.7rem;
  font-weight: 800;
}

.item-count {
  padding: 0.35rem 0.75rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: rgb(var(--muted));
  background: rgb(var(--card));
  border: 1px solid rgb(var(--line) / 0.08);
  border-radius: 999px;
}

.hazard-strip {
  height: 7px;
  border-radius: 4px;
  margin-bottom: 1.25rem;
  background: repeating-linear-gradient(
    45deg,
    rgb(var(--ink)) 0px,
    rgb(var(--ink)) 9px,
    rgb(var(--yellow)) 9px,
    rgb(var(--yellow)) 18px
  );
}

/* ---------- Belt / items ---------- */
.belt {
  background: rgb(var(--card));
  border-radius: 14px;
  border: 1px solid rgb(var(--line) / 0.06);
  box-shadow: 0 20px 40px -26px rgb(0 0 0 / 0.25);
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.items {
  list-style: none;
}

.item {
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr auto auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgb(var(--line) / 0.06);
  overflow: hidden;
}

.item:last-child {
  border-bottom: none;
}

.item.is-entering {
  animation: item-in 280ms var(--ease-out-expo) both;
}

@keyframes item-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .item.is-entering {
    animation: none;
  }
}

.item-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.item-icon svg {
  width: 20px;
  height: 20px;
}

.item-info {
  min-width: 0;
}

.item-info h3 {
  font-size: 0.86rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-price {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: rgb(var(--muted));
}

.qty-controls {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgb(var(--line) / 0.1);
  border-radius: 999px;
  overflow: hidden;
}

.qty-btn {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  color: rgb(var(--ink));
  cursor: pointer;
  transition: background-color 150ms ease;
}

.qty-btn:hover {
  background: rgb(var(--line) / 0.05);
}

.quantity {
  min-width: 20px;
  text-align: center;
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
}

.item-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.item-total {
  font-family: 'DM Mono', monospace;
  font-weight: 700;
  font-size: 0.82rem;
  min-width: 62px;
  text-align: right;
}

.remove-btn {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  color: rgb(var(--muted) / 0.6);
  font-size: 0.9rem;
  cursor: pointer;
  transition: color 150ms ease;
}

.remove-btn:hover {
  color: rgb(var(--red));
}

.scan-beam {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 2px;
  background: rgb(var(--red));
  box-shadow: 0 0 10px 1px rgb(var(--red) / 0.7);
  opacity: 0;
  pointer-events: none;
}

.scan-beam.is-scanning {
  animation: scan-sweep 450ms var(--ease-out-quad);
}

@keyframes scan-sweep {
  from {
    left: 0%;
    opacity: 1;
  }
  to {
    left: 100%;
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .scan-beam.is-scanning {
    animation: none;
  }
}

.empty {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: rgb(var(--muted));
  font-size: 0.88rem;
}

.empty.is-visible {
  display: flex;
}

.restock-btn {
  padding: 0.55rem 1.1rem;
  font-family: 'Manrope', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  color: rgb(var(--card));
  background: rgb(var(--ink));
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 150ms var(--ease-out-quad);
}

.restock-btn:active {
  transform: scale(0.97);
}

/* ---------- Receipt ---------- */
.receipt {
  background: rgb(var(--card));
  border-radius: 14px;
  border: 1px solid rgb(var(--line) / 0.06);
  box-shadow: 0 20px 40px -26px rgb(0 0 0 / 0.25);
  padding: 1.25rem;
}

.receipt-row {
  display: flex;
  justify-content: space-between;
  padding: 0.3rem 0;
  font-size: 0.86rem;
  color: rgb(var(--muted));
}

.receipt-row span:last-child {
  font-family: 'DM Mono', monospace;
  color: rgb(var(--ink));
}

.receipt-perf {
  height: 1px;
  margin: 0.6rem 0;
  background-image: radial-gradient(circle, rgb(var(--line) / 0.15) 1.5px, transparent 1.5px);
  background-size: 9px 1px;
  background-repeat: repeat-x;
}

.receipt-total {
  font-size: 1rem;
  font-weight: 800;
  color: rgb(var(--ink));
  margin-bottom: 1rem;
}

.receipt-total span:last-child {
  font-size: 1.1rem;
  color: rgb(var(--ink));
}

.checkout-btn {
  width: 100%;
  padding: 0.8rem;
  font-family: 'Manrope', sans-serif;
  font-size: 0.9rem;
  font-weight: 800;
  color: white;
  background: rgb(var(--green));
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition:
    background-color 200ms ease,
    transform 150ms var(--ease-out-quad);
}

.checkout-btn:hover:not(:disabled) {
  background: rgb(34 112 68);
}

.checkout-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.checkout-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 1.75rem;
  transform: translate(-50%, 12px);
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  background: rgb(var(--ink));
  color: white;
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 220ms var(--ease-out-quad),
    transform 220ms var(--ease-out-quad);
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (prefers-reduced-motion: reduce) {
  .toast {
    transition: opacity 150ms ease;
    transform: translate(-50%, 0);
  }
}

@media (max-width: 420px) {
  .item {
    grid-template-columns: 34px 1fr;
    row-gap: 0.5rem;
  }

  .item-right {
    grid-column: 1 / -1;
    justify-content: space-between;
  }
}