/* ==========================================================================
   OilViva Variation Filter — Accordion Panel UI
   Replaces the variation-swatches-woo horizontal swatches on single product
   pages with vertical collapsible panels (one per attribute).
   ========================================================================== */

/* Container for one attribute's panel */
.ov-var-filter {
    margin: 0 0 1.2rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-bg);
    overflow: hidden;
    font-family: inherit;
}

/* Header bar (clickable to collapse/expand) */
.ov-var-filter__header {
    display: flex;
    align-items: center;
    gap: .8rem;
    width: 100%;
    padding: .95rem 1.1rem;
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    font-size: .95rem;
    transition: background .2s;
}
.ov-var-filter__header:hover { background: var(--color-bg-alt); }
.ov-var-filter__header:focus-visible {
    outline: 2px solid var(--color-text);
    outline-offset: -2px;
}

.ov-var-filter__title {
    font-weight: 500;
    color: var(--color-text);
    flex: 0 0 auto;
    min-width: 5em;
}

.ov-var-filter__selected {
    flex: 1 1 auto;
    color: var(--color-text-3);
    font-weight: 400;
}
.ov-var-filter__selected em {
    color: var(--color-text-3);
    font-style: italic;
}

/* Caret icon (rotates based on expand state) */
.ov-var-filter__caret {
    flex: 0 0 auto;
    transition: transform .25s ease;
    color: var(--color-text-3);
}
.ov-var-filter.is-expanded .ov-var-filter__caret { transform: rotate(0); }
.ov-var-filter.is-collapsed .ov-var-filter__caret { transform: rotate(-90deg); }

/* Options list */
.ov-var-filter__body {
    padding: .25rem 0 .65rem;
    border-top: 1px solid var(--color-border-light);
    background: var(--color-bg);
}
.ov-var-filter.is-collapsed .ov-var-filter__body { display: none; }

/* Single option row (label wrapping a radio input) */
.ov-var-filter__option {
    display: flex;
    align-items: center;
    gap: .65rem;
    padding: .6rem 1.1rem;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.ov-var-filter__option:hover { background: var(--color-bg-alt); }

/* Custom radio button appearance */
.ov-var-filter__option input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: 16px;
    height: 16px;
    border: 1.5px solid var(--color-border);
    border-radius: 50%;
    background: var(--color-bg);
    position: relative;
    margin: 0;
    cursor: pointer;
    transition: border-color .15s;
    flex: 0 0 auto;
}
.ov-var-filter__option input[type="radio"]:checked {
    border-color: var(--color-text);
    background: var(--color-bg);
}
.ov-var-filter__option input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-text);
    transform: translate(-50%, -50%);
}
.ov-var-filter__option input[type="radio"]:focus-visible {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}

.ov-var-filter__option-text {
    flex: 1 1 auto;
    color: var(--color-text-2);
    font-size: .9rem;
}

/* Selected option highlight */
.ov-var-filter__option.is-selected {
    background: var(--color-bg-alt);
}
.ov-var-filter__option.is-selected .ov-var-filter__option-text {
    color: var(--color-text);
    font-weight: 500;
}

/* Disabled option (variation not available for this combination) */
.ov-var-filter__option.is-disabled {
    opacity: .45;
    cursor: not-allowed;
    pointer-events: none;
    text-decoration: line-through;
}

/* Safety net: hide variation-swatches-woo's original swatches container
   in case our filter didn't fully replace it. Should not trigger in
   normal operation. */
.cfvsw-swatches-container.cfvsw-product-container {
    display: none !important;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .ov-var-filter__header {
        padding: .85rem .9rem;
        font-size: .9rem;
    }
    .ov-var-filter__title {
        min-width: 4em;
    }
    .ov-var-filter__option {
        padding: .55rem .9rem;
    }
    .ov-var-filter__option-text {
        font-size: .88rem;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .ov-var-filter__header,
    .ov-var-filter__option,
    .ov-var-filter__caret,
    .ov-var-filter__option input[type="radio"] {
        transition-duration: 0.001ms !important;
    }
}