/**
 * Before/After comparison slider — Blueprint Engine (port z legacy tectum).
 *
 * Skin-agnostic — uses CSS variables które skin może override'ować.
 * Default: dark frame z primary handle.
 *
 * @package Blueprint\Engine\Realizacje
 * @since 2.4.0
 */

.bp-ba-section {
    --bp-ba-handle-color: var(--bs-primary, #0d6efd);
    --bp-ba-handle-size: 50px;
    --bp-ba-handle-shadow: 0 4px 20px rgba(0, 0, 0, .25);
    --bp-ba-line-color: #fff;
    --bp-ba-line-width: 3px;
    --bp-ba-radius: 16px;
    --bp-ba-height: 350px;
    --bp-ba-height-mobile: 280px;
    --bp-ba-label-bg: rgba(0, 0, 0, .8);
    --bp-ba-label-color: #fff;
    padding: 3rem 0;
    position: relative;
}

.bp-ba-section__header {
    text-align: center;
    margin-bottom: 3rem;
}

.bp-ba-section__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .5rem 1.25rem;
    border-radius: 999px;
    background: rgba(var(--bs-primary-rgb), .1);
    color: var(--bs-primary);
    font-weight: 600;
    font-size: .9rem;
    margin-bottom: 1rem;
}

.bp-ba-section__title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.bp-ba-section__lead {
    font-size: 1.1rem;
    color: var(--bs-secondary-color);
    margin: 0;
}

.bp-ba-section__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 480px), 1fr));
    gap: 2rem;
}

.bp-ba-slider {
    user-select: none;
    -webkit-user-select: none;
    border-radius: var(--bp-ba-radius);
    overflow: hidden;
    background: #000;
}

.bp-ba-slider__container {
    position: relative;
    width: 100%;
    height: var(--bp-ba-height);
    cursor: col-resize;
    overflow: hidden;
    touch-action: none;
    transition: box-shadow .3s ease;
}

.bp-ba-slider__container:hover {
    box-shadow: 0 12px 32px rgba(0, 0, 0, .2);
}

.bp-ba-slider__after,
.bp-ba-slider__before {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
}

.bp-ba-slider__before-clip {
    position: absolute;
    inset: 0;
    clip-path: inset(0 50% 0 0);
    -webkit-clip-path: inset(0 50% 0 0);
    pointer-events: none;
}

.bp-ba-slider__overlay-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, rgba(0,0,0,.3), transparent 40%, transparent 60%, rgba(0,0,0,.3));
    pointer-events: none;
    z-index: 2;
    transition: opacity .4s ease;
}

.bp-ba-slider__title {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem;
    text-align: center;
    z-index: 5;
    pointer-events: none;
    transition: transform .4s ease, opacity .3s ease;
}

.bp-ba-slider__title h3 {
    color: #fff;
    font-size: 1.15rem;
    font-weight: 700;
    text-shadow: 0 2px 8px rgba(0, 0, 0, .7);
    margin: 0;
}

.bp-ba-slider__labels {
    position: absolute;
    top: 1rem;
    left: 1rem;
    right: 1rem;
    z-index: 4;
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    transition: transform .4s ease, opacity .3s ease;
}

.bp-ba-slider__labels[data-position="bottom"] {
    top: auto;
    bottom: 1rem;
}

.bp-ba-slider__label {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    background: var(--bp-ba-label-bg);
    color: var(--bp-ba-label-color);
    padding: .4rem .9rem;
    border-radius: 999px;
    font-size: .85rem;
    font-weight: 500;
}

.bp-ba-slider__handle {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: var(--bp-ba-line-width);
    background: var(--bp-ba-line-color);
    box-shadow: 0 0 10px rgba(0, 0, 0, .3);
    transform: translateX(-50%);
    z-index: 10;
    pointer-events: none;
}

.bp-ba-slider__button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: var(--bp-ba-handle-size);
    height: var(--bp-ba-handle-size);
    background: #fff;
    color: var(--bp-ba-handle-color);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    box-shadow: var(--bp-ba-handle-shadow);
    pointer-events: auto;
    transition: transform .2s ease, box-shadow .2s ease;
    z-index: 11;
}

.bp-ba-slider__button:hover {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 8px 28px rgba(0, 0, 0, .35);
}

.bp-ba-slider.is-dragging .bp-ba-slider__button {
    cursor: grabbing;
    transform: translate(-50%, -50%) scale(.95);
}

.bp-ba-slider__button i {
    font-size: 1.3rem;
}

.bp-ba-slider__instructions {
    position: absolute;
    bottom: 1rem;
    left: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    font-size: .85rem;
    text-shadow: 0 2px 8px rgba(0, 0, 0, .7);
    pointer-events: none;
    z-index: 5;
    transition: opacity .3s ease, transform .4s ease;
}

/* Hover effects — texts fade out (legacy parity) */
.bp-ba-slider__container:hover .bp-ba-slider__title { transform: translateY(-20px); opacity: 0; }
.bp-ba-slider__container:hover .bp-ba-slider__labels { transform: translateY(-15px); opacity: 0; }
.bp-ba-slider__container:hover .bp-ba-slider__instructions { transform: translateY(20px); opacity: 0; }
.bp-ba-slider__container:hover .bp-ba-slider__overlay-gradient { opacity: .5; }

/* Mobile adjustments */
@media (max-width: 767.98px) {
    .bp-ba-section { padding: 2rem 0; }
    .bp-ba-section__grid { gap: 1.25rem; }
    .bp-ba-slider__container { height: var(--bp-ba-height-mobile); }
    .bp-ba-slider__button { width: 40px; height: 40px; }
    .bp-ba-slider__button i { font-size: 1rem; }
    .bp-ba-slider__title h3 { font-size: 1rem; }
    .bp-ba-slider__instructions { font-size: .75rem; }
}

/* Dark mode */
[data-bs-theme="dark"] .bp-ba-section__title { color: var(--bs-body-color); }