:root {
  color-scheme: light;
  --color-background: #0f172a;
  --color-surface: #ffffff;
  --color-surface-muted: #f8fafc;
  --color-surface-dark: #1e293b;
  --color-primary: #2563eb;
  --color-primary-soft: rgba(37, 99, 235, 0.12);
  --color-accent: #22c55e;
  --color-danger: #ef4444;
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-border: rgba(15, 23, 42, 0.08);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-lg: 0 28px 60px rgba(15, 23, 42, 0.25);
  --shadow-md: 0 14px 30px rgba(15, 23, 42, 0.12);
  --shadow-sm: 0 8px 18px rgba(15, 23, 42, 0.08);
  --font-sans: 'Inter', 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition-base: 180ms ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, rgba(37, 99, 235, 0.3) 0, rgba(15, 23, 42, 0.92) 50%), var(--color-background);
  display: flex;
  align-items: stretch;
  justify-content: center;
  color: var(--color-text);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: url('data:image/svg+xml,%3Csvg width="160" height="160" viewBox="0 0 160 160" fill="none" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M60 0H100L160 60V100L100 160H60L0 100V60L60 0Z" fill="rgba(37, 99, 235, 0.04)"/%3E%3C/svg%3E') repeat;
  opacity: 0.3;
  pointer-events: none;
}

.app {
  position: relative;
  width: min(100%, 960px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1;
}

.app__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #ffffff;
  padding: 4px 0 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.36);
  backdrop-filter: blur(8px);
  font-size: 1.3rem;
}

.brand__title {
  font-size: clamp(1.15rem, 3.5vw, 1.6rem);
  font-weight: 700;
  margin: 0;
}

.brand__tagline {
  margin: 2px 0 0;
  font-size: 0.82rem;
  opacity: 0.78;
}

.app__content {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.scan-surface {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scan-surface__side {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.zxing-badge {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--color-surface-muted);
  color: var(--color-text-muted);
  border: 1px solid rgba(15, 23, 42, 0.12);
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.zxing-badge[data-variant='wasm'] {
  background: rgba(37, 99, 235, 0.15);
  color: var(--color-primary);
  border-color: rgba(37, 99, 235, 0.35);
}

.zxing-badge[data-variant='legacy'] {
  background: rgba(15, 23, 42, 0.1);
  color: var(--color-text);
  border-color: rgba(15, 23, 42, 0.22);
}

.video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  box-shadow: var(--shadow-md);
}

video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px;
}

.scan-frame {
  flex: 1;
  margin: 0;
  border-radius: 18px;
  border: 2px dashed rgba(255, 255, 255, 0.55);
  position: relative;
}

.scan-frame::after {
  content: '';
  position: absolute;
  inset: 18%;
  border: 2px solid rgba(34, 197, 94, 0.9);
  border-radius: 14px;
  box-shadow: 0 0 0 999px rgba(15, 23, 42, 0.25);
}

.scan-status {
  align-self: flex-start;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #ffffff;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(10px);
  margin-top: 10px;
}

.scan-status[data-variant='active'] {
  background: rgba(34, 197, 94, 0.78);
}

.scan-status[data-variant='error'] {
  background: rgba(239, 68, 68, 0.85);
}

.video-loader {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(6px);
}

.video-loader[hidden] {
  display: none;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.35);
  border-top-color: #ffffff;
  animation: spin 1s linear infinite;
}

.control-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  justify-items: center;
}

.zoom-overlay-button {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translate(-50%, 0);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  background: rgba(15, 23, 42, 0.2);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  pointer-events: auto;
  backdrop-filter: blur(12px);
  transition: background var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.zoom-overlay-button:hover {
  background: rgba(37, 99, 235, 0.28);
  border-color: rgba(255, 255, 255, 0.85);
}

.zoom-overlay-button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.35);
}

.zoom-overlay-button:active {
  transform: translate(-50%, 1px) scale(0.98);
}

.zoom-overlay-button:disabled {
  opacity: 0.6;
  pointer-events: none;
}

.button {
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 16px;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.button:active {
  transform: translateY(1px);
}

.button--primary {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.button--primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.button--ghost {
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-primary);
}

.button--subtle {
  background: transparent;
  color: var(--color-text-muted);
  padding-inline: 8px;
}

.button--danger {
  color: var(--color-danger);
}

.panel {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel__title {
  font-size: 1.05rem;
  margin: 0;
  font-weight: 600;
  color: var(--color-text);
}

.panel__subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
}

.panel__body {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.empty-state {
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-text-muted);
  text-align: center;
  font-size: 0.95rem;
}

.product-card {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 14px;
  padding: 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(37, 99, 235, 0.12);
  background: linear-gradient(140deg, rgba(37, 99, 235, 0.08), rgba(255, 255, 255, 0.9));
}

.product-card__image {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-sm);
  background: #fff;
  object-fit: contain;
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.product-card__image--placeholder {
  display: grid;
  place-items: center;
  font-size: 2rem;
  color: var(--color-text-muted);
  background: rgba(37, 99, 235, 0.08);
}

.product-card__meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.product-card__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.product-card__price {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.price-current {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
}

.price-original {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.product-card__details {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.product-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  font-size: 0.8rem;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.product-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-card__link {
  text-decoration: none;
  color: #ffffff;
  background: var(--color-primary);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
}

.loader-card {
  padding: 22px;
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(37, 99, 235, 0.2);
  background: rgba(37, 99, 235, 0.04);
  color: var(--color-text-muted);
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.loader-card__spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid rgba(37, 99, 235, 0.2);
  border-top-color: var(--color-primary);
  animation: spin 0.9s linear infinite;
}

.error-card {
  padding: 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.08);
  color: var(--color-danger);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.error-card__title {
  font-weight: 600;
  margin: 0;
  font-size: 1rem;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 260px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: rgba(248, 250, 252, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.18);
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.history-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.history-item__meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.history-item__barcode {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
}

.history-item__timestamp {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.history-item__price {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-primary);
}

.badge-soft {
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--color-primary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.last-scan {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  body {
    padding: 32px;
  }

  .app__content {
    padding: 28px;
    gap: 24px;
  }

  .scan-surface {
    flex-direction: row;
    align-items: flex-start;
  }

  .video-wrapper {
    flex: 1;
    max-width: 340px;
  }

  .scan-surface__side {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .control-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}