:root {
    --before-after-bg: #f4f8ff;
    --frame-radius: 24px;
    --frame-shadow: 0 28px 72px rgba(5, 42, 94, 0.15);
    --divider-line: rgba(18, 78, 166, 0.95);
    --handle-size: 46px;
    --label-bg: rgba(255, 255, 255, 0.94);
    --label-text: #12315c;
    --transition: 0.18s ease;
}

.before-after {
    width: 100%;
    padding: 14px;
    background: var(--before-after-bg);
}

.before-after__comparison {
    position: relative;
    display: inline-block; /* size by sizer image */
    width: auto;
    height: auto;
    max-width: 100%;
    margin: 0 auto;
    overflow: hidden;
    border-radius: var(--frame-radius);
    box-shadow: var(--frame-shadow);
    background: #eff7ff;
}

.before-after__image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* align both images to the left so clipping reveals from left-to-right
       and the image content does not shift/slide while the overlay width changes */
    object-position: left center;
    display: block;
    pointer-events: none;
    user-select: none;
}

.before-after__sizer {
    display: block;
    width: auto;
    max-width: 100%;
    height: auto;
    visibility: hidden;
    pointer-events: none;
    user-select: none;
}

.before-after__before-wrapper {
    position: absolute;
    inset: 0;
    width: 50%;
    overflow: hidden;
    transition: width var(--transition);
    will-change: width;
}

.before-after__slider {
    position: absolute;
    top: 0;
    left: 50%;
    width: 1px;
    height: 100%;
    background: rgba(255,255,255,0.9);
    transform: translateX(-50%);
    pointer-events: none;
    box-shadow: 0 0 0 1px rgba(0,0,0,0.04) inset;
}

.before-after__slider::after {
    /* thin darker center for subtle separation */
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 1px;
    height: 100%;
    background: rgba(0,0,0,0.06);
}

.before-after__slider-handle {
    position: absolute;
    left: 50%;
    top: 50%;
    width: var(--handle-size);
    height: var(--handle-size);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.98);
    border: 3px solid rgba(255,255,255,0.9);
    box-shadow: 0 10px 30px rgba(6,30,80,0.18);
    transform: translate(-50%, -50%);
    cursor: ew-resize;
    transition: transform var(--transition), box-shadow var(--transition);
    pointer-events: auto;
    touch-action: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.before-after__slider-handle::before {
    /* circular inner accent */
    content: "";
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(18,78,166,0.95);
    display: block;
}

.before-after__slider-handle span {
    position: absolute;
    width: 0;
    height: 0;
}

.before-after__slider-handle .arrow {
    position: absolute;
    width: 8px;
    height: 8px;
    transform: translate(-50%, -50%);
}

.before-after__slider-handle .arrow--left {
    left: 42%;
    top: 50%;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-right: 8px solid white;
}

.before-after__slider-handle .arrow--right {
    left: 58%;
    top: 50%;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-left: 8px solid white;
}

/* darken the Before side slightly to match the reference */
.before-after__before-wrapper::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(6, 18, 40, 0.18);
    pointer-events: none;
}

.before-after__label {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    padding: 8px 14px;
    border-radius: 999px;
    background: transparent;
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.01em;
    white-space: nowrap;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    border: 1px solid rgba(255,255,255,0.28);
    z-index: 30;
    pointer-events: none; /* allow dragging through labels */
}

.before-after__label--before {
    left: 18px; /* left corner */
}

.before-after__label--after {
    right: 18px; /* right corner */
}

.before-after__comparison::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 25% 20%, rgba(255,255,255,0.14), transparent 18%),
                radial-gradient(circle at 72% 84%, rgba(255,255,255,0.08), transparent 18%);
    pointer-events: none;
}

.before-after--dragging {
    user-select: none;
}

/* Disable CSS transitions while dragging to ensure immediate response */
.before-after--dragging .before-after__before-wrapper,
.before-after--dragging .before-after__slider,
.before-after--dragging .before-after__slider-handle {
    transition: none !important;
}

@media (max-width: 640px) {
    .before-after {
        padding: 10px;
    }

    .before-after__comparison {
        height: 240px;
    }

    .before-after__slider-handle {
        width: 38px;
        height: 38px;
    }

    .before-after__label {
        top: 12px;
        padding: 8px 14px;
        font-size: 0.85rem;
    }
}