/* ============================================================
   cart.css — Step 10: Cart Page Styles
   Mobile-first · Consistent with catalog/product design tokens
   ============================================================ */

/* ── Design tokens (reference catalog where possible) ────── */
:root {
  --cart-accent:          var(--catalog-accent, #1a73e8);
  --cart-accent-light:    var(--catalog-accent-light, #e8f0fe);
  --cart-text-primary:    var(--catalog-text-primary, #1e1e1e);
  --cart-text-secondary:  var(--catalog-text-secondary, #5f6368);
  --cart-text-muted:      var(--catalog-text-muted, #80868b);
  --cart-bg-card:         var(--catalog-bg-card, #ffffff);
  --cart-bg-page:         var(--catalog-bg-page, #f5f7fa);
  --cart-border:          var(--catalog-border, #dadce0);
  --cart-price-color:     var(--catalog-price-color, #0a6f2f);
  --cart-card-radius:     var(--catalog-card-radius, 10px);
  --cart-transition:      var(--catalog-transition, 0.22s ease);

  /* Cart-specific */
  --cart-flash-success-bg:  #e6f4ea;
  --cart-flash-success-txt: #137333;
  --cart-flash-error-bg:    #fce8e6;
  --cart-flash-error-txt:   #c62828;
  --cart-qty-btn-size:      34px;
  --cart-remove-color:      #80868b;
  --cart-remove-hover:      #c62828;
}

/* ── Main Layout ─────────────────────────────────────────── */
.cart-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 56px;
  min-height: 60vh;
}

/* ── Flash Message ───────────────────────────────────────── */
.cart-flash {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 20px;
  border: 1px solid transparent;
}

.cart-flash--success {
  background: var(--cart-flash-success-bg);
  color: var(--cart-flash-success-txt);
  border-color: #a8dab5;
}

.cart-flash--error {
  background: var(--cart-flash-error-bg);
  color: var(--cart-flash-error-txt);
  border-color: #f5c6c2;
}

/* ── Page Header ─────────────────────────────────────────── */
.cart-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.cart-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--cart-text-primary);
  margin: 0;
  letter-spacing: -0.3px;
}

.cart-header__count {
  font-size: 0.82rem;
  color: var(--cart-text-muted);
  font-weight: 500;
}

/* ── Empty State ─────────────────────────────────────────── */
.cart-empty {
  text-align: center;
  padding: 72px 24px;
}

.cart-empty__icon {
  font-size: 3.5rem;
  margin-bottom: 18px;
  display: block;
}

.cart-empty__title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--cart-text-primary);
  margin: 0 0 8px;
}

.cart-empty__text {
  font-size: 0.88rem;
  color: var(--cart-text-secondary);
  margin: 0 0 24px;
}

.cart-empty__cta {
  display: inline-block;
  padding: 10px 24px;
  background: var(--cart-accent);
  color: #ffffff;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  transition: background var(--cart-transition);
}

.cart-empty__cta:hover {
  background: #1558b0;
}

/* ── Cart Layout: stacked mobile, side-by-side desktop ───── */
.cart-layout {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ── Item List ───────────────────────────────────────────── */
.cart-items {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ── Single Cart Item Row ────────────────────────────────── */
.cart-item {
  display: grid;
  /* mobile: 2-col (thumb + info stack) */
  grid-template-columns: 80px 1fr;
  grid-template-rows: auto auto auto;
  gap: 10px 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--cart-border);
  align-items: start;
}

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

/* Thumbnail */
.cart-item__thumb {
  grid-row: 1 / 3;
  width: 80px;
  height: 80px;
  border-radius: 8px;
  overflow: hidden;
  background: #f1f3f4;
  flex-shrink: 0;
}

.cart-item__thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Name + unit price */
.cart-item__info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.cart-item__name {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--cart-text-primary);
  line-height: 1.3;
}

.cart-item__name-link {
  color: inherit;
  text-decoration: none;
  transition: color var(--cart-transition);
}

.cart-item__name-link:hover {
  color: var(--cart-accent);
}

.cart-item__unit-price {
  font-size: 0.78rem;
  color: var(--cart-text-muted);
}

/* Qty controls row (spans full width on mobile) */
.cart-item__qty-wrap {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 4px;
}

.cart-item__qty-form {
  display: flex;
  align-items: center;
  gap: 0;
}

.cart-item__qty-btn {
  width: var(--cart-qty-btn-size);
  height: var(--cart-qty-btn-size);
  border: 1.5px solid var(--cart-border);
  background: var(--cart-bg-card);
  color: var(--cart-text-secondary);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--cart-transition);
  padding: 0;
}

.cart-item__qty-btn--dec {
  border-radius: 6px 0 0 6px;
}

.cart-item__qty-btn--inc {
  border-radius: 0 6px 6px 0;
}

.cart-item__qty-btn:hover {
  background: var(--cart-accent-light);
  border-color: var(--cart-accent);
  color: var(--cart-accent);
}

.cart-item__qty-display {
  width: 40px;
  height: var(--cart-qty-btn-size);
  border-top: 1.5px solid var(--cart-border);
  border-bottom: 1.5px solid var(--cart-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--cart-text-primary);
  background: #fafbfc;
  user-select: none;
}

/* Subtotal + Remove on mobile: inline row */
.cart-item__subtotal {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1px;
}

.cart-item__subtotal-label {
  font-size: 0.7rem;
  color: var(--cart-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.cart-item__subtotal-value {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--cart-price-color);
}

/* Remove button */
.cart-item__actions {
  display: flex;
  align-items: center;
}

.cart-item__remove {
  background: none;
  border: none;
  color: var(--cart-remove-color);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 6px;
  border-radius: 4px;
  transition: color var(--cart-transition), background var(--cart-transition);
  line-height: 1;
}

.cart-item__remove:hover {
  color: var(--cart-remove-hover);
  background: #fce8e6;
}

/* ── Order Summary ───────────────────────────────────────── */
.cart-summary {
  background: var(--cart-bg-card);
  border: 1.5px solid var(--cart-border);
  border-radius: var(--cart-card-radius);
  padding: 24px;
}

.cart-summary__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--cart-text-primary);
  margin: 0 0 18px;
  letter-spacing: -0.2px;
}

.cart-summary__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 6px 0;
}

.cart-summary__label {
  font-size: 0.85rem;
  color: var(--cart-text-secondary);
}

.cart-summary__value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--cart-text-primary);
}

.cart-summary__divider {
  border: none;
  border-top: 1.5px solid var(--cart-border);
  margin: 14px 0;
}

/* Total row — prominent */
.cart-summary__row--total {
  padding: 10px 0 0;
}

.cart-summary__value--total {
  font-size: 1.35rem;
  color: var(--cart-price-color);
  font-weight: 700;
  letter-spacing: -0.3px;
}

/* Checkout actions */
.cart-summary__actions {
  margin-top: 20px;
}

.cart-summary__checkout-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 42px;
  border-radius: 8px;
  border: 1px solid var(--cart-accent);
  background: var(--cart-accent);
  color: #ffffff;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  transition: all var(--cart-transition);
}

.cart-summary__checkout-btn:hover {
  background: #1558b0;
  border-color: #1558b0;
}

.cart-summary__checkout-note {
  display: block;
  font-size: 0.78rem;
  color: var(--cart-text-muted);
  text-align: center;
  font-style: italic;
  margin-top: 10px;
}

/* Clear cart button */
.cart-summary__clear-form {
  margin-top: 18px;
  text-align: center;
}

.cart-summary__clear-btn {
  background: none;
  border: none;
  color: var(--cart-remove-color);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 4px 0;
  transition: color var(--cart-transition);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.cart-summary__clear-btn:hover {
  color: var(--cart-remove-hover);
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE — Tablet & Desktop
   ══════════════════════════════════════════════════════════ */

@media (min-width: 600px) {
  /* Item row becomes a single horizontal line */
  .cart-item {
    grid-template-columns: 96px 1fr auto auto auto;
    grid-template-rows: 1fr;
    gap: 16px;
    align-items: center;
  }

  .cart-item__thumb {
    grid-row: 1;
    width: 96px;
    height: 96px;
  }

  .cart-item__info {
    grid-row: 1;
  }

  .cart-item__qty-wrap {
    grid-column: auto;
    grid-row: 1;
    justify-content: center;
    padding-top: 0;
  }

  .cart-item__subtotal {
    grid-row: 1;
    align-items: flex-end;
  }

  .cart-item__actions {
    grid-row: 1;
  }
}

@media (min-width: 768px) {
  .cart-main {
    padding: 32px 24px 64px;
  }

  /* Side-by-side: items left, summary right */
  .cart-layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .cart-items {
    flex: 1;
    min-width: 0;
  }

  .cart-summary {
    flex: 0 0 300px;
    max-width: 300px;
    position: sticky;
    top: 24px;
  }
}

@media (min-width: 1024px) {
  .cart-main {
    padding: 40px 32px 72px;
  }

  .cart-summary {
    flex: 0 0 320px;
    max-width: 320px;
  }
}