/* ==========================================================================
   XSTO Pinned Scroll — Front-end Styles
   ========================================================================== */

/* Reset box-sizing for plugin scope */
.xsto-ps-spacer *,
.xsto-ps-spacer *::before,
.xsto-ps-spacer *::after {
    box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   Spacer & Section
   -------------------------------------------------------------------------- */
.xsto-ps-spacer {
    position: relative;
    /* Height set by JS: count * 100vh */
}

.xsto-ps {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: hidden;
    background: #016CB2;
}

.xsto-ps__inner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 20px 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    height: 100%;
    align-items: start;
}

/* --------------------------------------------------------------------------
   Left Column
   -------------------------------------------------------------------------- */
.xsto-ps__left {
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
    padding-right: 20px;
}

.xsto-ps__label {
    display: inline-block;
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 2px;
    color: #57AEE7;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.xsto-ps__heading {
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    font-size: 44px;
    line-height: 1.15;
    color: #FFFFFF;
    margin: 0 0 20px 0;
}

.xsto-ps__text,
.xsto-ps__text p {
    font-family: 'Roboto', sans-serif;
    font-weight: 400;
    font-size: 17px;
    line-height: 1.65;
    color: #E5E5E5;
    margin: 0 0 24px 0;
}

.xsto-ps__divider {
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin: 0;
}

/* --------------------------------------------------------------------------
   Left Column — Intro
   -------------------------------------------------------------------------- */
.xsto-ps__intro {
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* --------------------------------------------------------------------------
   Card Stack — cards peek from the BOTTOM only (no right offset)
   -------------------------------------------------------------------------- */
.xsto-ps__card-wrapper {
    position: relative;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    /* Height set by JS: leftCol height - intro height */
    padding-bottom: 8px;
}

/* Main card — front */
.xsto-ps__card {
    position: relative;
    z-index: 3;
    width: 100%;
    height: 100%;
    border-radius: 12px;
    overflow: hidden;
    background: #FFFFFF;
    border: 2px solid #57AEE7;
}

/* Shared stacked card base — smaller & centered */
.xsto-ps__card-stack {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    aspect-ratio: 614 / 464;
    border-radius: 12px;
    overflow: hidden;
}

/* Middle stack — 96% width, peeks 4px below main card bottom */
.xsto-ps__card-stack--1 {
    z-index: 2;
    width: 96%;
    bottom: -4px;
    border: 2px solid #3491CE;
}

/* Back stack — 92% width, peeks 8px below main card bottom */
.xsto-ps__card-stack--2 {
    z-index: 1;
    width: 92%;
    bottom: -8px;
    border: 2px solid #57AEE7;
    opacity: 0.6;
}

/* --------------------------------------------------------------------------
   Card Images (stacked inside each card layer)
   -------------------------------------------------------------------------- */
.xsto-ps__card-image,
.xsto-ps__stack-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.xsto-ps__card-image.is-active,
.xsto-ps__stack-image.is-active {
    opacity: 1;
}

/* No image placeholder */
.xsto-ps__card-image:not([style*="background-image"]),
.xsto-ps__stack-image:not([style*="background-image"]) {
    background: linear-gradient(135deg, #3491CE 0%, #016CB2 100%);
}

/* --------------------------------------------------------------------------
   Card Gradient Overlay & Label
   -------------------------------------------------------------------------- */
.xsto-ps__card-gradient {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 55%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.65) 0%, transparent 100%);
    z-index: 5;
    pointer-events: none;
}

.xsto-ps__card-label {
    position: absolute;
    bottom: 20px;
    left: 24px;
    z-index: 6;
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    font-size: 28px;
    color: #FFFFFF;
    transition: opacity 0.3s ease;
}

/* --------------------------------------------------------------------------
   Right Column
   -------------------------------------------------------------------------- */
.xsto-ps__right {
    position: relative;
    height: 100%;
    overflow: hidden;
}

.xsto-ps__right-track {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0;
    /* JS will translate this track */
    transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    padding-top: 80px;
}

/* Top fade mask */
.xsto-ps__right-fade {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, #016CB2 0%, transparent 100%);
    z-index: 10;
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   Right Column Items
   -------------------------------------------------------------------------- */
.xsto-ps__item {
    opacity: 0.2;
    transition: opacity 0.5s ease;
    padding: 32px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.xsto-ps__item:first-child {
    border-top: none;
}

.xsto-ps__item.is-active {
    opacity: 1;
}

.xsto-ps__item-number {
    font-family: 'Roboto', sans-serif;
    font-weight: 700;
    font-size: 16px;
    color: #57AEE7;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.xsto-ps__item-title {
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    font-size: 32px;
    line-height: 1.2;
    color: #FFFFFF;
    margin: 0 0 12px 0;
}

.xsto-ps__item-desc {
    font-family: 'Roboto', sans-serif;
    font-weight: 400;
    font-size: 17px;
    line-height: 1.65;
    color: #E5E5E5;
    margin: 0 0 12px 0;
}

.xsto-ps__item-ideal {
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    font-size: 15px;
    font-style: italic;
    color: #57AEE7;
    margin: 0;
}

/* --------------------------------------------------------------------------
   Responsive — Tablet
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .xsto-ps__inner {
        padding: 60px 40px;
        gap: 40px;
    }

    .xsto-ps__heading {
        font-size: 36px;
    }

    .xsto-ps__item-title {
        font-size: 28px;
    }
}

/* --------------------------------------------------------------------------
   Responsive — Short Viewports (e.g. 768px-tall laptops)
   Only applies on desktop widths where pinning is active.
   -------------------------------------------------------------------------- */
@media (max-height: 800px) and (min-width: 769px) {

    .xsto-ps__heading {
        font-size: 36px;
        margin-bottom: 14px;
    }

    .xsto-ps__text,
    .xsto-ps__text p {
        font-size: 15px;
        margin-bottom: 16px;
    }

    .xsto-ps__divider {
        margin-bottom: 0;
    }

    .xsto-ps__right-track {
        padding-top: 40px;
    }

    .xsto-ps__right-fade {
        height: 60px;
    }

    .xsto-ps__item {
        padding: 20px 0;
    }

    .xsto-ps__item-title {
        font-size: 26px;
        margin-bottom: 8px;
    }

    .xsto-ps__item-desc {
        font-size: 15px;
        margin-bottom: 8px;
    }
}

/* --------------------------------------------------------------------------
   Responsive — Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .xsto-ps-spacer {
        height: auto !important;
    }

    .xsto-ps {
        position: relative;
        height: auto;
        overflow: visible;
    }

    .xsto-ps__inner {
        grid-template-columns: 1fr;
        padding: 48px 20px;
        gap: 32px;
        height: auto;
    }

    .xsto-ps__left {
        height: auto;
        padding-right: 0;
    }

    .xsto-ps__heading {
        font-size: 30px;
    }

    .xsto-ps__intro {
        height: auto;
        overflow: visible;
    }

    .xsto-ps__card-wrapper {
        height: auto;
        max-width: 100%;
    }

    .xsto-ps__right {
        height: auto;
        overflow: visible;
    }

    .xsto-ps__right-track {
        transform: none !important;
        padding-top: 0;
    }

    .xsto-ps__right-fade {
        display: none;
    }

    .xsto-ps__item {
        opacity: 1;
    }

    .xsto-ps__item-title {
        font-size: 24px;
    }
}