:root {
  --color-surface-primary: #ffffff;
  --color-surface-secondary: #f9faff;
  --color-surface-accent: #f0f6ff;
  --color-surface-overlay: rgba(240, 246, 255, 0.65);

  --color-text-primary: #1a202c;
  --color-text-secondary: #4a5568;
  --color-text-tertiary: #718096;
  --color-text-on-accent: #ffffff;

  --color-accent-primary: #0052cc;
  --color-accent-primary-hover: #0041a3;
  --color-accent-primary-darker: #003380;
  --color-accent-secondary: #e6f0ff;
  --color-accent-primary-rgb: 0, 82, 204;
  --color-surface-accent-rgb: 240, 246, 255;


  --color-rating: #ffb400;
  --color-success: #34c759;
  --color-featured-badge-bg-start: #ffdd57;
  --color-featured-badge-bg-end: #ffb400;
  --color-featured-badge-text: #4a3b00;
  --color-featured-badge-icon: #9e7300;

  --color-border-light: rgba(0, 27, 71, 0.1);
  --color-border-focus: rgba(0, 102, 255, 0.6);
  --color-border-interactive: rgba(0, 27, 71, 0.25);

  --category-electronics-bg: #e0e7ff;
  --category-electronics-text: #3730a3;
  --category-gaming-bg: #dcfce7;
  --category-gaming-text: #15803d;
  --category-photo-bg: #fffbeb;
  --category-photo-text: #b45309;
  --category-wearables-bg: #dbeafe;
  --category-wearables-text: #1d4ed8;
  --category-audio-bg: #fee2e2;
  --category-audio-text: #b91c1c;

  --shadow-xs: 0 1px 2px rgba(26, 32, 44, 0.03);
  --shadow-sm: 0 2px 4px rgba(26, 32, 44, 0.05);
  --shadow-md: 0 6px 16px rgba(26, 32, 44, 0.07);
  --shadow-lg: 0 12px 32px rgba(26, 32, 44, 0.09);
  --shadow-xl: 0 24px 48px rgba(26, 32, 44, 0.1), 0 8px 16px rgba(26,32,44,0.06);
  --shadow-focus-ring: 0 0 0 3px var(--color-border-focus);
  --shadow-inset-light: inset 0 1px 2px rgba(0,0,0,0.06);
  --shadow-inset-active: inset 0 2px 4px rgba(0,0,0,0.08);

  --duration-micro: 100ms;
  --duration-fast: 200ms;
  --duration-normal: 350ms;
  --duration-slow: 500ms;
  --duration-extra-slow: 900ms;

  --timing-ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --timing-ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --timing-ease-in-out-cubic: cubic-bezier(0.65, 0, 0.35, 1);
  --timing-soft-eio: cubic-bezier(0.76, 0, 0.24, 1);
  --timing-anticipate: cubic-bezier(0.38, -0.2, 0.36, 1.4);
  --timing-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --timing-elegant-snap: cubic-bezier(0.25, 0.1, 0.2, 1.25);

  --font-family-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.375rem;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;

  --spacing-unit: 4px;
  --space-xs: calc(var(--spacing-unit) * 1);
  --space-sm: calc(var(--spacing-unit) * 2);
  --space-md: calc(var(--spacing-unit) * 4);
  --space-lg: calc(var(--spacing-unit) * 6);
  --space-xl: calc(var(--spacing-unit) * 8);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --card-min-width: 280px;
  --card-max-width: 320px;
  --card-height: 510px;
  --card-padding: var(--space-lg);
  --card-margin-inline: var(--space-md);
  --card-scale-inactive: 0.92;
  --card-y-offset-inactive: 0px;
  --card-opacity-inactive: 0.7;
  --card-blur-inactive: 0.8px;
  --card-saturate-inactive: 0.9;
  --card-scale-active: 1.035;
  --card-y-offset-active: -12px;
  --card-active-border-width: 2.5px;

  --carousel-perspective: 2000px;
  --carousel-arrow-size: 44px;
  --carousel-arrow-offset: calc(var(--carousel-arrow-size) / -2.2);

  --focus-outline-offset: 2px;
}

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: linear-gradient(160deg, #f2f6fe 0%, #e9eef7 45%, #dfe7f5 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow-x: hidden;
  padding: clamp(20px, 5vw, 40px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.icon {
  width: 1em;
  height: 1em;
  display: inline-block;
  vertical-align: -0.125em;
  fill: currentColor;
  flex-shrink: 0;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.carousel-container {
  position: relative;
  width: 100%;
  max-width: 1200px;
  perspective: var(--carousel-perspective);
  margin-block: clamp(40px, 8vh, 80px);
  min-height: 560px;
  padding-bottom: 60px;
  contain: layout style;
}

.cards-wrapper {
  display: flex;
  align-items: center;
  padding-block: 30px;
  margin-inline: auto;
  transition: transform var(--duration-slow) var(--timing-soft-eio);
  will-change: transform;
}

.card {
  background-color: var(--color-surface-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--card-padding);
  margin-inline: var(--card-margin-inline);
  min-width: var(--card-min-width);
  max-width: var(--card-max-width);
  height: var(--card-height);
  flex-shrink: 0;
  opacity: var(--card-opacity-inactive);
  filter: blur(var(--card-blur-inactive)) saturate(var(--card-saturate-inactive));
  transform: scale(var(--card-scale-inactive)) translateY(var(--card-y-offset-inactive));
  cursor: pointer;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  border: 1.5px solid var(--color-border-light);
  transition-property: transform, opacity, filter, box-shadow, border-color;
  transition-duration: var(--duration-normal);
  transition-timing-function: var(--timing-soft-eio);
  will-change: transform, opacity, filter, box-shadow;
  contain: content;
}

.card:not(.active):hover {
  transform: scale(calc(var(--card-scale-inactive) + 0.025)) translateY(calc(var(--card-y-offset-inactive) - 8px));
  box-shadow: var(--shadow-lg);
  opacity: 0.9;
  filter: blur(calc(var(--card-blur-inactive) - 0.4px)) saturate(1);
  z-index: 5;
  border-color: rgba(var(--color-accent-primary-rgb), 0.2);
}

.card:focus-visible {
  outline: none;
  box-shadow: var(--shadow-lg), var(--shadow-focus-ring);
  border-color: var(--color-accent-primary);
}

.card.active {
  opacity: 1;
  filter: blur(0px) saturate(1);
  transform: scale(var(--card-scale-active)) translateY(var(--card-y-offset-active));
  box-shadow: var(--shadow-xl);
  z-index: 10;
  border-color: transparent;
  cursor: default;
}

.card.active::after {
  content: "";
  position: absolute;
  inset: calc(var(--card-active-border-width) * -1);
  border-radius: var(--radius-xl);
  border: var(--card-active-border-width) solid var(--color-accent-primary);
  pointer-events: none;
  opacity: 0.8;
  transition: opacity var(--duration-fast) var(--timing-ease-out-quint);
  animation: pulse-border 2.5s infinite var(--timing-ease-in-out-cubic);
  z-index: -1;
}

@keyframes pulse-border {
  0%, 100% { opacity: 0.6; box-shadow: 0 0 10px -3px var(--color-accent-primary); transform: scale(1); }
  50% { opacity: 1; box-shadow: 0 0 20px 0px var(--color-accent-primary); transform: scale(1.003); }
}

.card__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
  min-height: 30px;
}

.card__category-badge {
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 2.5);
  border-radius: var(--radius-sm);
  letter-spacing: var(--letter-spacing-wide);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  transition: transform var(--duration-fast) var(--timing-spring),
    box-shadow var(--duration-fast) var(--timing-ease-out-quint),
    background-color var(--duration-fast) var(--timing-ease-out-quint);
}
.card__category-badge .icon {
  width: 1.1em;
  height: 1.1em;
}
.card:not(.active):hover .card__category-badge {
  transform: translateY(-1px) scale(1.03);
  box-shadow: var(--shadow-xs);
}
.card.active .card__category-badge {
  transform: translateY(-2.5px) scale(1.06);
  box-shadow: var(--shadow-sm);
}

.card__category-badge.electronics {
  background-color: var(--category-electronics-bg);
  color: var(--category-electronics-text);
}
.card__category-badge.gaming {
  background-color: var(--category-gaming-bg);
  color: var(--category-gaming-text);
}
.card__category-badge.photo {
  background-color: var(--category-photo-bg);
  color: var(--category-photo-text);
}
.card__category-badge.wearables {
  background-color: var(--category-wearables-bg);
  color: var(--category-wearables-text);
}
.card__category-badge.audio {
  background-color: var(--category-audio-bg);
  color: var(--category-audio-text);
}


.card__featured-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background-image: linear-gradient(
    45deg,
    var(--color-featured-badge-bg-start),
    var(--color-featured-badge-bg-end)
  );
  color: var(--color-featured-badge-text);
  font-size: var(--font-size-xs);
  font-weight: 700;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transform: rotate(3.5deg) translateY(-2px);
  transform-origin: top right;
  transition: transform var(--duration-normal) var(--timing-spring), box-shadow var(--duration-normal) var(--timing-spring);
  z-index: 5;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.18);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.card__featured-badge .icon {
  width: 0.9em;
  height: 0.9em;
  color: var(--color-featured-badge-icon);
}
.card.active .card__featured-badge {
  transform: rotate(2.5deg) translateY(-3.5px) scale(1.1);
  box-shadow: 0 4px 12px rgba(var(--color-accent-primary-rgb), 0.2);
}

.card__image-container {
  background-color: var(--color-surface-accent);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 180px;
  position: relative;
  flex-shrink: 0;
  overflow: hidden;
  transition: transform var(--duration-normal) var(--timing-soft-eio),
    box-shadow var(--duration-normal) var(--timing-soft-eio);
  will-change: transform, box-shadow;
}
.card.active .card__image-container {
  transform: translateY(-5px) scale(1.03);
  box-shadow: 0 8px 24px rgba(var(--color-accent-primary-rgb), 0.12);
}

.card__product-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform var(--duration-slow) var(--timing-soft-eio), filter var(--duration-normal) var(--timing-ease-out-quint);
  will-change: transform, filter;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.06));
}
.card:hover .card__product-image,
.card.active .card__product-image {
  transform: scale(1.1) translateY(-5px) rotate(1.5deg);
  filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.1)) brightness(1.02);
}

.card__image-actions {
  position: absolute;
  bottom: 12px;
  right: 12px;
  display: flex;
  gap: calc(var(--space-sm) + 2px);
  opacity: 0;
  transform: translateY(10px) scale(0.9);
  transition: opacity var(--duration-fast) var(--timing-ease-out-quint),
    transform var(--duration-fast) var(--timing-spring);
  will-change: opacity, transform;
  z-index: 2;
}
.card:hover .card__image-actions,
.card.active .card__image-actions,
.card:focus-within .card__image-actions {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.card__image-action-btn {
  background-color: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  width: 38px;
  height: 38px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--color-accent-primary);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition-property: background-color, transform, box-shadow, color;
  transition-duration: var(--duration-fast);
  transition-timing-function: var(--timing-ease-out-quint);
  position: relative;
  overflow: hidden;
}
.card__image-action-btn .icon {
  width: 18px;
  height: 18px;
  transition: transform var(--duration-fast) var(--timing-ease-out-quint);
}
.card__image-action-btn:hover,
.card__image-action-btn:focus-visible {
  background-color: var(--color-accent-secondary);
  transform: translateY(-3px) scale(1.12);
  box-shadow: var(--shadow-md), 0 0 0 2px var(--color-surface-primary);
  color: var(--color-accent-primary-hover);
  outline: none;
}
.card__image-action-btn:hover .icon,
.card__image-action-btn:focus-visible .icon {
    transform: scale(1.15);
}
.card__image-action-btn:focus-visible {
  box-shadow: var(--shadow-md), var(--shadow-focus-ring), 0 0 0 2px var(--color-surface-primary);
}
.card__image-action-btn:active {
  transform: translateY(-1px) scale(0.96);
  box-shadow: var(--shadow-inset-light);
  background-color: rgba(var(--color-accent-primary-rgb), 0.05);
}

.card__product-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
  transition: color var(--duration-fast) var(--timing-ease-out-quint), text-shadow var(--duration-fast) var(--timing-ease-out-quint);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  min-height: calc(var(--font-size-lg) * var(--line-height-tight) * 2);
}
.card.active .card__product-name,
.card:hover .card__product-name {
  color: var(--color-accent-primary-hover);
  text-shadow: 0 0 10px rgba(var(--color-accent-primary-rgb), 0.15);
}

.card__product-sku {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-md);
  display: block;
  letter-spacing: var(--letter-spacing-wide);
  opacity: 0.85;
}

.card__rating-reviews {
  display: flex;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  flex-shrink: 0;
  gap: calc(var(--space-xs) + 2px);
}
.card__rating-reviews .icon {
  width: 1.1em;
  height: 1.1em;
  color: var(--color-text-tertiary);
}
.card__stars {
  color: var(--color-rating);
  letter-spacing: 0.06em;
  filter: drop-shadow(0 1px 1.5px rgba(255, 180, 0, 0.25));
  line-height: 1;
}
.card__stars .icon {
    color: inherit;
}
.card__stars .empty-star {
  color: #d1d8e0;
  opacity: 0.75;
}
.card__review-count {
  margin-left: var(--space-xs);
  opacity: 0.95;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
}

.card__price {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-top: auto;
  margin-bottom: var(--space-md);
  padding-top: var(--space-sm);
  flex-shrink: 0;
  transition: transform var(--duration-fast) var(--timing-spring), color var(--duration-fast) var(--timing-ease-out-quint);
}
.card.active .card__price {
  transform: scale(1.08) translateX(-3px);
  color: var(--color-accent-primary-hover);
}

.card__action-button {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: calc(var(--spacing-unit) * 3.25) var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition-property: background-color, transform, box-shadow, background-image;
  transition-duration: var(--duration-fast);
  transition-timing-function: var(--timing-ease-out-quint);
  border: none;
  margin-top: auto;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
  z-index: 1;
  outline: none;
  background-image: linear-gradient(180deg, var(--color-accent-primary) 0%, var(--color-accent-primary-hover) 100%);
  color: var(--color-text-on-accent);
  box-shadow: var(--shadow-inset-light), 0 1px 2px rgba(var(--color-accent-primary-rgb), 0.2);
}
.card__action-button .icon {
  width: 1.2em;
  height: 1.2em;
}
.card__action-button:focus-visible {
  box-shadow: var(--shadow-focus-ring), 0 2px 4px rgba(var(--color-accent-primary-rgb),0.3);
}
.card__action-button:hover {
  background-image: linear-gradient(180deg, var(--color-accent-primary-hover) 0%, var(--color-accent-primary-darker) 100%);
  transform: translateY(-2.5px);
  box-shadow: 0 6px 16px rgba(var(--color-accent-primary-rgb), 0.3), var(--shadow-inset-active);
}
.card__action-button:active {
  transform: translateY(0px);
  background-image: linear-gradient(180deg, var(--color-accent-primary-darker) 0%, var(--color-accent-primary-hover) 100%);
  box-shadow: 0 2px 6px rgba(var(--color-accent-primary-rgb), 0.25), var(--shadow-inset-active);
}

.card__action-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}
.card__action-button::after {
  content: "";
  position: absolute;
  top: -10%;
  left: 0;
  width: 60%;
  height: 120%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.28) 50%,
    transparent 100%
  );
  transform: translateX(-150%) skewX(-25deg);
  transition: transform 0s;
}
.card__action-button:hover::after {
  transform: translateX(250%) skewX(-25deg);
  transition: transform var(--duration-extra-slow) var(--timing-ease-in-out-cubic);
}

.nav-arrow {
  position: absolute;
  top: calc(50% - 70px);
  transform: translateY(-50%);
  background-color: var(--color-surface-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  width: var(--carousel-arrow-size);
  height: var(--carousel-arrow-size);
  color: var(--color-accent-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  z-index: 20;
  display: flex;
  justify-content: center;
  align-items: center;
  transition-property: background-color, transform, box-shadow, color, border-color;
  transition-duration: var(--duration-fast);
  transition-timing-function: var(--timing-ease-out-quint);
  will-change: transform, box-shadow, background-color;
  outline: none;
}
.nav-arrow .icon {
  width: 24px;
  height: 24px;
  transition: transform var(--duration-fast) var(--timing-elegant-snap);
}
.nav-arrow:hover {
  background-color: var(--color-accent-secondary);
  transform: translateY(-50%) scale(1.15);
  box-shadow: var(--shadow-lg), 0 0 0 2.5px rgba(var(--color-accent-primary-rgb), 0.1);
  color: var(--color-accent-primary-hover);
  border-color: rgba(var(--color-accent-primary-rgb), 0.2);
}
.nav-arrow:hover .icon {
  transform: scale(1.2);
}
.nav-arrow:active {
  transform: translateY(-50%) scale(0.96);
  box-shadow: var(--shadow-sm);
  transition-duration: var(--duration-micro);
  background-color: rgba(var(--color-accent-primary-rgb), 0.05);
}
.nav-arrow:focus-visible {
  box-shadow: var(--shadow-lg), var(--shadow-focus-ring);
  border-color: var(--color-accent-primary);
}
.nav-arrow.prev-arrow {
  left: var(--carousel-arrow-offset);
}
.nav-arrow.next-arrow {
  right: var(--carousel-arrow-offset);
}

.pagination-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: var(--space-xl);
  gap: 12px;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  height: 20px;
}
.pagination-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-border-interactive);
  transition-property: background-color, transform, width, box-shadow;
  transition-duration: var(--duration-normal);
  transition-timing-function: var(--timing-soft-eio);
  cursor: pointer;
  border: none;
  padding: 0;
  outline: none;
}
.pagination-dot:hover {
  background-color: rgba(var(--color-accent-primary-rgb), 0.35);
  transform: scale(1.35);
}
.pagination-dot:focus-visible {
  outline: var(--focus-outline-offset) solid var(--color-border-focus);
  outline-offset: var(--focus-outline-offset);
  background-color: rgba(var(--color-accent-primary-rgb), 0.3);
}
.pagination-dot.active {
  width: 30px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-primary-hover);
  transform: scaleY(1.2) scaleX(1.05);
  cursor: default;
  box-shadow: 0 0 10px -2px var(--color-accent-primary);
}
.pagination-dot.active:hover {
  transform: scaleY(1.2) scaleX(1.05);
}

.keyboard-hint {
  position: absolute;
  bottom: -38px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  opacity: 0;
  visibility: hidden;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: opacity var(--duration-normal) var(--timing-ease-out-quint) 0.2s,
              visibility var(--duration-normal) var(--timing-ease-out-quint) 0.2s;
  pointer-events: none;
}
.carousel-container:hover .keyboard-hint,
.carousel-container:focus-within .keyboard-hint {
  opacity: 0.95;
  visibility: visible;
}
.key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding-inline: 6px;
  border-radius: 5px;
  background: var(--color-surface-primary);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-xs), 0 1.5px 0px rgba(0,0,0,0.07) inset, 0 -0.5px 0px rgba(255,255,255,0.6) inset;
  font-size: 0.8em;
  color: var(--color-text-secondary);
  font-weight: 600;
}
.key .icon {
  width: 1em;
  height: 1em;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  background-color: var(--color-surface-overlay);
  backdrop-filter: blur(5px) saturate(1.1);
  border-radius: var(--radius-lg);
  z-index: 30;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-normal) var(--timing-ease-out-quint),
              visibility var(--duration-normal) var(--timing-ease-out-quint);
  pointer-events: none;
}
.loading-overlay.visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.loader {
  width: 52px;
  height: 52px;
  border: 5px solid var(--color-accent-secondary);
  border-top-color: var(--color-accent-primary-hover);
  border-right-color: var(--color-accent-primary);
  border-radius: var(--radius-full);
  animation: spin 0.9s var(--timing-ease-in-out-cubic) infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.progress-container {
  width: calc(100% - 80px);
  margin-inline: auto;
  height: 5px;
  background-color: rgba(var(--color-accent-primary-rgb), 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: absolute;
  bottom: 25px;
  left: 40px;
  z-index: 1;
  opacity: 0.85;
  box-shadow: var(--shadow-inset-light);
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent-primary-hover), var(--color-accent-primary));
  border-radius: var(--radius-full);
  transition: width var(--duration-normal) var(--timing-soft-eio);
  transform-origin: left;
  will-change: width;
  box-shadow: 0 0 10px -2px var(--color-accent-primary);
}

.notification {
  position: fixed;
  bottom: 25px;
  left: 50%;
  transform: translateX(-50%) translateY(150%) scale(0.95);
  background-color: #2c3e50;
  color: var(--color-text-on-accent);
  padding: 16px 30px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  box-shadow: var(--shadow-xl);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: transform 0.6s var(--timing-spring),
    opacity 0.5s var(--timing-ease-out-quint),
    visibility 0s linear 0.6s;
  display: flex;
  align-items: center;
  gap: 12px;
}
.notification .icon {
  width: 20px;
  height: 20px;
}
.notification.success .icon {
  color: var(--color-success);
}
.notification.visible {
  transform: translateX(-50%) translateY(0) scale(1);
  opacity: 1;
  visibility: visible;
  transition: transform 0.6s var(--timing-spring),
    opacity 0.5s var(--timing-ease-out-quint),
    visibility 0s linear 0s;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  :root {
    --duration-micro: 0ms;
    --duration-fast: 0ms;
    --duration-normal: 0ms;
    --duration-slow: 0ms;
    --duration-extra-slow: 0ms;
  }
  .card.active::after {
    animation: none;
  }
  .card__action-button:hover::after {
    transition: none;
    transform: translateX(250%) skewX(-25deg);
  }
  .loader {
    animation-duration: 2.5s;
  }
  .notification {
    transition-timing-function: var(--timing-ease-out-quint), var(--timing-ease-out-quint), linear;
  }
}

@media (max-width: 992px) {
  :root {
    --card-min-width: 270px;
    --card-max-width: 300px;
  }
  .nav-arrow.prev-arrow {
    left: -18px;
  }
  .nav-arrow.next-arrow {
    right: -18px;
  }
}

@media (max-width: 768px) {
  body {
    padding: clamp(15px, 4vw, 30px);
  }
  :root {
    --carousel-arrow-size: 40px;
    --card-height: auto;
    --card-padding: var(--space-md);
    --card-margin-inline: calc(var(--spacing-unit) * 2.5);
  }
  .nav-arrow {
    top: calc(50% - 60px);
  }
  .nav-arrow .icon {
    width: 20px;
    height: 20px;
  }
  .nav-arrow.prev-arrow {
    left: 5px;
  }
  .nav-arrow.next-arrow {
    right: 5px;
  }

  .card {
    min-width: clamp(240px, 75vw, 280px);
    max-width: clamp(260px, 80vw, 300px);
  }
  .card__product-name {
    font-size: var(--font-size-md);
    min-height: calc(var(--font-size-md) * var(--line-height-tight) * 2);
  }
  .card__image-container {
    height: 160px;
    padding: var(--space-md);
  }
  .card__price {
    font-size: var(--font-size-lg);
  }
  .card__action-button {
    padding: calc(var(--spacing-unit) * 2.75);
    font-size: var(--font-size-sm);
  }
  .pagination-dots {
    margin-top: var(--space-lg);
  }
  .progress-container,
  .keyboard-hint {
    display: none;
  }
}

@media (max-width: 480px) {
  :root {
    --card-padding: calc(var(--spacing-unit) * 3.5);
    --font-size-sm: 0.8125rem;
    --font-size-md: 0.9375rem;
  }
  .card__image-container {
    height: 140px;
    margin-bottom: var(--space-md);
  }
  .card__product-name {
    font-size: var(--font-size-md);
    min-height: calc(var(--font-size-md) * var(--line-height-tight) * 2);
  }
  .card__rating-reviews,
  .card__product-sku {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-sm);
  }
  .card__price {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
  }
  .card__action-button {
    font-size: var(--font-size-sm);
    padding: calc(var(--spacing-unit) * 2.5) var(--space-md);
  }
  .notification {
    width: calc(100% - 30px);
    padding: 14px 22px;
    bottom: 15px;
  }
}