/* ZERK — premium cart */
.zerk-cart-root {
  --zc-ease: cubic-bezier(0.16, 1, 0.3, 1);
  --zc-glass: rgba(18, 18, 20, 0.88);
  --zc-border: rgba(255, 255, 255, 0.1);
  --zc-accent: #2997ff;
  --zc-fab: 56px;
  position: fixed;
  z-index: 8500;
  left: max(16px, env(safe-area-inset-left));
  bottom: max(16px, env(safe-area-inset-bottom));
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
  pointer-events: none;
}

.zerk-cart-root * {
  box-sizing: border-box;
}

/* FAB */
.zerk-cart-fab {
  pointer-events: auto;
  position: relative;
  width: var(--zc-fab);
  height: var(--zc-fab);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, #2e2e32 0%, #0c0c0e 55%, #1a1a1e 100%);
  border: 1px solid var(--zc-border);
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset,
    0 0 48px rgba(180, 180, 200, 0.08);
  color: #f5f5f7;
  transition: transform 0.45s var(--zc-ease), box-shadow 0.45s var(--zc-ease);
}

.zerk-cart-fab:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow:
    0 16px 48px rgba(0, 0, 0, 0.6),
    0 0 60px rgba(41, 151, 255, 0.18);
}

.zerk-cart-fab svg {
  width: 22px;
  height: 22px;
}

.zerk-cart-fab__badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 980px;
  font-size: 11px;
  font-weight: 700;
  line-height: 20px;
  text-align: center;
  background: linear-gradient(135deg, #3a9bff, #0077ed);
  color: #fff;
  box-shadow: 0 4px 12px rgba(41, 151, 255, 0.45);
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.35s var(--zc-ease), transform 0.45s var(--zc-ease);
}

.zerk-cart-fab__badge.is-visible {
  opacity: 1;
  transform: scale(1);
}

.zerk-cart-fab__badge.is-bump {
  animation: zc-badge-bump 0.55s var(--zc-ease);
}

@keyframes zc-badge-bump {
  0% { transform: scale(1); }
  40% { transform: scale(1.28); }
  100% { transform: scale(1); }
}

/* Backdrop */
.zerk-cart-backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s var(--zc-ease), visibility 0.4s;
  pointer-events: none;
}

.zerk-cart-root.is-open .zerk-cart-backdrop {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Panel */
.zerk-cart-panel {
  pointer-events: auto;
  position: fixed;
  left: max(16px, env(safe-area-inset-left));
  bottom: calc(var(--zc-fab) + 24px + env(safe-area-inset-bottom));
  width: min(400px, calc(100vw - 32px));
  max-height: min(72vh, 640px);
  display: flex;
  flex-direction: column;
  background: var(--zc-glass);
  backdrop-filter: blur(28px) saturate(1.35);
  border: 1px solid var(--zc-border);
  border-radius: 24px;
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.65),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.96);
  transition:
    opacity 0.45s var(--zc-ease),
    transform 0.55s var(--zc-ease),
    visibility 0.45s;
  overflow: hidden;
}

.zerk-cart-root.is-open .zerk-cart-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.zerk-cart-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.zerk-cart-panel__title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: #f5f5f7;
}

.zerk-cart-panel__sub {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 2px;
}

.zerk-cart-close {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: #f5f5f7;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s, transform 0.25s;
}

.zerk-cart-close:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: scale(1.05);
}

.zerk-cart-body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 12px 16px;
}

.zerk-cart-body::-webkit-scrollbar {
  width: 5px;
}

.zerk-cart-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.zerk-cart-empty {
  text-align: center;
  padding: 40px 20px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 14px;
  line-height: 1.55;
}

.zerk-cart-empty a {
  color: var(--zc-accent);
  text-decoration: none;
}

/* Line item */
.zerk-cart-item {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  margin-bottom: 8px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: border-color 0.25s, background 0.25s;
}

.zerk-cart-item:hover {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
}

.zerk-cart-item__img {
  width: 64px;
  height: 48px;
  border-radius: 10px;
  object-fit: contain;
  background: rgba(0, 0, 0, 0.35);
}

.zerk-cart-item__name {
  font-size: 13px;
  font-weight: 600;
  color: #f5f5f7;
  line-height: 1.3;
  margin-bottom: 4px;
}

.zerk-cart-item__meta {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
}

.zerk-cart-item__price {
  font-size: 13px;
  font-weight: 600;
  color: #f5f5f7;
  margin-top: 6px;
}

.zerk-cart-item__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.zerk-cart-qty {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 980px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 2px;
}

.zerk-cart-qty button {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: #f5f5f7;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s;
}

.zerk-cart-qty button:hover {
  background: rgba(255, 255, 255, 0.1);
}

.zerk-cart-qty span {
  min-width: 24px;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
}

.zerk-cart-remove {
  border: none;
  background: none;
  color: rgba(255, 255, 255, 0.35);
  font-size: 11px;
  cursor: pointer;
  padding: 4px;
  transition: color 0.2s;
}

.zerk-cart-remove:hover {
  color: #ff6b6b;
}

/* Footer */
.zerk-cart-foot {
  flex-shrink: 0;
  padding: 16px 18px calc(16px + env(safe-area-inset-bottom));
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.25);
}

.zerk-cart-summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 14px;
}

.zerk-cart-summary__label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.zerk-cart-summary__total {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: #f5f5f7;
}

.zerk-cart-summary__items {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  text-align: right;
}

.zerk-cart-checkout-btn {
  width: 100%;
  padding: 14px 20px;
  border: none;
  border-radius: 980px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.02em;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(135deg, #3a9bff 0%, #0071e3 100%);
  box-shadow: 0 8px 28px rgba(41, 151, 255, 0.35);
  transition: transform 0.3s var(--zc-ease), box-shadow 0.3s;
  margin-bottom: 10px;
}

.zerk-cart-checkout-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(41, 151, 255, 0.45);
}

.zerk-cart-checkout-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* Quick order form */
.zerk-cart-order {
  display: none;
  padding-top: 4px;
}

.zerk-cart-order.is-active {
  display: block;
}

.zerk-cart-order__back {
  border: none;
  background: none;
  color: var(--zc-accent);
  font-size: 13px;
  cursor: pointer;
  padding: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.zerk-cart-field {
  margin-bottom: 10px;
}

.zerk-cart-field label {
  display: block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 6px;
}

.zerk-cart-field input,
.zerk-cart-field textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.35);
  color: #f5f5f7;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.zerk-cart-field input:focus,
.zerk-cart-field textarea:focus {
  outline: none;
  border-color: rgba(41, 151, 255, 0.5);
  box-shadow: 0 0 0 3px rgba(41, 151, 255, 0.15);
}

.zerk-cart-field textarea {
  resize: vertical;
  min-height: 72px;
}

.zerk-cart-send {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.zerk-cart-send__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 16px;
  border-radius: 980px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.3s var(--zc-ease), box-shadow 0.3s;
}

.zerk-cart-send__btn:hover {
  transform: translateY(-2px);
}

.zerk-cart-send__btn--tg {
  background: linear-gradient(135deg, #3a9bff, #0071e3);
  color: #fff;
  box-shadow: 0 6px 24px rgba(41, 151, 255, 0.35);
}

.zerk-cart-send__btn--vk {
  background: linear-gradient(135deg, rgba(81, 129, 184, 0.5), rgba(42, 88, 140, 0.4));
  border-color: rgba(81, 129, 184, 0.45);
  color: #e8f0fa;
}

.zerk-cart-send__btn--wa {
  background: rgba(48, 209, 88, 0.12);
  border-color: rgba(48, 209, 88, 0.35);
  color: #5fe87a;
}

/* Add to cart buttons */
.zerk-add-btn {
  position: absolute;
  z-index: 6;
  right: 12px;
  top: 12px;
  bottom: auto;
  padding: 8px 14px;
  border: none;
  border-radius: 980px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  color: #f5f5f7;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity 0.35s var(--zc-ease),
    transform 0.4s var(--zc-ease),
    background 0.25s,
    box-shadow 0.25s;
}

.catalog-card:hover .zerk-add-btn,
.catalog-card:focus-within .zerk-add-btn,
.product-add-cart-wrap .zerk-add-btn {
  opacity: 1;
  transform: translateY(0);
}

.zerk-add-btn:hover {
  background: linear-gradient(135deg, rgba(58, 155, 255, 0.9), rgba(0, 113, 227, 0.85));
  border-color: rgba(41, 151, 255, 0.5);
  box-shadow: 0 6px 20px rgba(41, 151, 255, 0.35);
}

.zerk-add-btn.is-added {
  background: linear-gradient(135deg, rgba(48, 209, 88, 0.85), rgba(28, 160, 65, 0.8));
  border-color: rgba(48, 209, 88, 0.5);
  opacity: 1;
  transform: translateY(0);
}

.catalog-card {
  position: relative;
}

.catalog-card__link {
  color: inherit;
}

.catalog-card {
  cursor: default;
}

.catalog-card__link {
  cursor: pointer;
}

.product-add-cart-wrap {
  margin-bottom: 16px;
}

.product-add-cart-wrap .zerk-add-btn {
  position: static;
  opacity: 1;
  transform: none;
  width: 100%;
  padding: 14px 20px;
  font-size: 14px;
}

/* Toast */
.zerk-cart-toast {
  position: fixed;
  top: max(20px, env(safe-area-inset-top));
  left: 50%;
  z-index: 9300;
  transform: translateX(-50%) translateY(-120%);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 980px;
  background: var(--zc-glass);
  backdrop-filter: blur(20px) saturate(1.3);
  border: 1px solid rgba(48, 209, 88, 0.35);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  color: #f5f5f7;
  font-size: 14px;
  font-weight: 500;
  pointer-events: none;
  opacity: 0;
  transition: transform 0.55s var(--zc-ease), opacity 0.4s;
}

.zerk-cart-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.zerk-cart-toast__icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(48, 209, 88, 0.2);
  color: #5fe87a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

@media (max-width: 900px) {
  .zerk-cart-root {
    bottom: calc(64px + env(safe-area-inset-bottom));
    left: max(12px, env(safe-area-inset-left));
  }

  .catalog-page .zerk-cart-fab,
  .product-page .zerk-cart-fab {
    display: none;
  }
}

/* Mobile bottom sheet */
@media (max-width: 640px) {
  .zerk-cart-panel {
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: none;
    max-height: 88vh;
    border-radius: 24px 24px 0 0;
    transform: translateY(100%);
  }

  .zerk-cart-root.is-open .zerk-cart-panel {
    transform: translateY(0);
  }

  .zerk-cart-fab {
    bottom: max(16px, env(safe-area-inset-bottom));
  }

  .zerk-add-btn {
    opacity: 1;
    transform: none;
  }
}

/* VK order modal */
.zerk-vk-modal {
  position: fixed;
  inset: 0;
  z-index: 9200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(20px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right))
    max(20px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
}

.zerk-vk-modal[hidden] {
  display: none;
}

.zerk-vk-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.zerk-vk-modal__panel {
  position: relative;
  width: min(100%, 440px);
  max-height: min(90vh, 640px);
  overflow: auto;
  padding: 24px 22px 22px;
  border-radius: 20px;
  background: linear-gradient(165deg, rgba(32, 32, 36, 0.98) 0%, rgba(14, 14, 16, 0.98) 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.65),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  color: #f5f5f7;
}

.zerk-vk-modal__close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, color 0.2s;
}

.zerk-vk-modal__close:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.zerk-vk-modal__title {
  margin: 0 32px 10px 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.zerk-vk-modal__lead {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.72);
}

.zerk-vk-modal__lead kbd {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  font-family: inherit;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.zerk-vk-modal__label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
}

.zerk-vk-modal__text {
  width: 100%;
  margin: 0 0 16px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(81, 129, 184, 0.35);
  background: rgba(0, 0, 0, 0.35);
  color: #e8f0fa;
  font-size: 13px;
  line-height: 1.5;
  resize: vertical;
  min-height: 140px;
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
}

.zerk-vk-modal__text:focus {
  outline: 2px solid rgba(81, 129, 184, 0.5);
  outline-offset: 2px;
}

.zerk-vk-modal__actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.zerk-vk-modal__btn {
  width: 100%;
  padding: 13px 16px;
  border-radius: 980px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.25s var(--zc-ease), box-shadow 0.25s;
}

.zerk-vk-modal__btn:hover {
  transform: translateY(-1px);
}

.zerk-vk-modal__btn--copy {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.15);
  color: #f5f5f7;
}

.zerk-vk-modal__btn--open {
  background: linear-gradient(135deg, rgba(81, 129, 184, 0.65), rgba(42, 88, 140, 0.55));
  border-color: rgba(81, 129, 184, 0.5);
  color: #fff;
  box-shadow: 0 8px 28px rgba(41, 100, 180, 0.35);
}

.zerk-vk-modal__btn--ghost {
  background: transparent;
  color: rgba(255, 255, 255, 0.5);
}

.zerk-vk-modal__btn--ghost:hover {
  color: rgba(255, 255, 255, 0.85);
}

body.zerk-vk-modal-open {
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .zerk-cart-panel,
  .zerk-cart-fab,
  .zerk-cart-toast,
  .zerk-add-btn,
  .zerk-vk-modal__btn {
    transition-duration: 0.01ms;
  }
}