/**
 * AKS Linked Variations — High-Performance Frontend CSS
 * Conforming strictly to SUPER_ENGINEERING_GUIDELINES.md (< 4KB, Zero Frameworks)
 */

:root {
  --aks-lv-brand: #D3363B;
  --aks-lv-brand-hover: #b91c1c;
  --aks-lv-text-main: #1e293b;
  --aks-lv-text-muted: #64748b;
  --aks-lv-border: #e2e8f0;
  --aks-lv-border-hover: #94a3b8;
  --aks-lv-bg-pill: #f8fafc;
  --aks-lv-bg-pill-hover: #f1f5f9;
  --aks-lv-active-bg: #0f172a;
  --aks-lv-active-text: #ffffff;
  --aks-lv-radius: 6px;
  --aks-lv-transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

.aks-lv-container {
  display: block;
  width: 100%;
  margin: 1.25rem 0 1rem 0;
  padding: 1rem 0 0.5rem 0;
  border-top: 1px solid var(--aks-lv-border);
  border-bottom: none;
  box-sizing: border-box;
}

.aks-lv-inner {
  display: flex;
  flex-direction: column;
  gap: 1.125rem;
}

.aks-lv-row {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.aks-lv-row-header {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
}

.aks-lv-label {
  font-weight: 600;
  color: var(--aks-lv-text-main);
}

.aks-lv-active-val {
  font-weight: 500;
  color: var(--aks-lv-brand);
}

.aks-lv-swatches {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

/* Base Swatch Anchor / Button */
.aks-lv-swatch {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  cursor: pointer;
  outline: none;
  user-select: none;
  transition: var(--aks-lv-transition);
  -webkit-tap-highlight-color: transparent;
}

.aks-lv-swatch:focus-visible {
  box-shadow: 0 0 0 2px #ffffff, 0 0 0 4px var(--aks-lv-brand);
}

/* ================= COLOR SWATCHES ================= */
.aks-lv-swatch-color {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  padding: 2px;
  border: 1px solid transparent;
  background: transparent;
}

.aks-lv-color-swatch {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.aks-lv-color-border {
  position: absolute;
  inset: 0;
  border: 1px solid #cbd5e1;
  border-radius: 50%;
  pointer-events: none;
}

.aks-lv-swatch-color:hover .aks-lv-color-swatch {
  transform: scale(1.08);
}

.aks-lv-swatch-color.is-active {
  border-color: var(--aks-lv-active-bg);
  box-shadow: 0 0 0 1px var(--aks-lv-active-bg);
}

.aks-lv-swatch-color.is-active .aks-lv-color-swatch {
  transform: scale(0.92);
}

/* ================= PILL / BUTTON SWATCHES ================= */
.aks-lv-swatch-pill {
  min-height: 36px;
  padding: 0.375rem 0.875rem;
  background-color: var(--aks-lv-bg-pill);
  border: 1px solid var(--aks-lv-border);
  border-radius: var(--aks-lv-radius);
  color: var(--aks-lv-text-main);
  font-size: 0.8125rem;
  font-weight: 500;
  text-align: center;
  line-height: 1.25;
}

.aks-lv-swatch-pill:hover {
  background-color: var(--aks-lv-bg-pill-hover);
  border-color: var(--aks-lv-border-hover);
  color: var(--aks-lv-text-main);
}

.aks-lv-swatch-pill.is-active {
  background-color: var(--aks-lv-active-bg);
  border-color: var(--aks-lv-active-bg);
  color: var(--aks-lv-active-text);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* ================= IMAGE SWATCHES ================= */
.aks-lv-swatch-image {
  width: 44px;
  height: 44px;
  border-radius: var(--aks-lv-radius);
  border: 1px solid var(--aks-lv-border);
  padding: 2px;
  background: #ffffff;
  overflow: hidden;
}

.aks-lv-swatch-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: calc(var(--aks-lv-radius) - 2px);
  display: block;
}

.aks-lv-swatch-image:hover {
  border-color: var(--aks-lv-border-hover);
}

.aks-lv-swatch-image.is-active {
  border-color: var(--aks-lv-brand);
  box-shadow: 0 0 0 1px var(--aks-lv-brand);
}

/* ================= DROPDOWN SELECT ================= */
.aks-lv-select {
  display: block;
  width: 100%;
  max-width: 320px;
  height: 40px;
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--aks-lv-text-main);
  background-color: #ffffff;
  border: 1px solid var(--aks-lv-border);
  border-radius: var(--aks-lv-radius);
  appearance: auto;
  cursor: pointer;
}

.aks-lv-select:focus {
  border-color: var(--aks-lv-brand);
  outline: none;
  box-shadow: 0 0 0 1px var(--aks-lv-brand);
}

/* ================= DISABLED / UNAVAILABLE / OUT OF STOCK ================= */
.aks-lv-swatch.is-disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.aks-lv-swatch.is-out-of-stock {
  position: relative;
  opacity: 0.55;
}

.aks-lv-swatch.is-out-of-stock::after {
  content: '';
  position: absolute;
  left: 10%;
  top: 50%;
  width: 80%;
  height: 1px;
  background: #ef4444;
  transform: rotate(-30deg);
  pointer-events: none;
}

/* ================= TOOLTIPS ================= */
.aks-lv-tooltip {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 4px 8px;
  background-color: #1e293b;
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 500;
  border-radius: 4px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease, transform 0.15s ease;
  z-index: 100;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.aks-lv-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 4px;
  border-style: solid;
  border-color: #1e293b transparent transparent transparent;
}

.aks-lv-swatch:hover .aks-lv-tooltip,
.aks-lv-swatch:focus-visible .aks-lv-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  .aks-lv-swatch-color {
    width: 38px;
    height: 38px;
  }
  .aks-lv-swatch-pill {
    min-height: 40px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }
}