/*
 * Brochure carousel
 *
 * PDF page 1:
 *   Square front cover
 *
 * PDF pages 2 onwards:
 *   Landscape two-page spreads
 */

.brochure-carousel {
    --brochure-background: #eef1f4;
    --brochure-surface: #ffffff;
    --brochure-text: #1f2933;
    --brochure-muted: #667085;
    --brochure-border: #d8dee6;
    --brochure-accent: var(--brand-primary, #0a66c2);
    --brochure-control-size: 3rem;

    width: 100%;
    max-width: 1180px;
    margin: 2rem auto;
    color: var(--brochure-text);
}

.brochure-carousel *,
.brochure-carousel *::before,
.brochure-carousel *::after {
    box-sizing: border-box;
}

/* Header */

.brochure-carousel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.brochure-carousel__title {
    margin: 0;
    font-size: clamp(1.15rem, 2vw, 1.6rem);
    line-height: 1.3;
}

.brochure-carousel__download {
    display: inline-flex;
    flex: 0 0 auto;
    min-height: 2.65rem;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1rem;
    border: 1px solid var(--brochure-border);
    border-radius: 0.55rem;
    background: var(--brochure-surface);
    color: var(--brochure-text);
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    transition:
        border-color 160ms ease,
        color 160ms ease,
        background-color 160ms ease;
}

.brochure-carousel__download:hover {
    border-color: var(--brochure-accent);
    color: var(--brochure-accent);
}

/* Viewer stage */

.brochure-carousel__viewer {
    position: relative;
    display: flex;
    width: 100%;
    min-height: 600px;
    align-items: center;
    overflow: hidden;
    border: 1px solid var(--brochure-border);
    border-radius: 1rem;
    background: var(--brochure-background);
}

.brochure-carousel__status {
    position: absolute;
    z-index: 3;
    top: 50%;
    left: 50%;
    width: calc(100% - 4rem);
    margin: 0;
    transform: translate(-50%, -50%);
    color: var(--brochure-muted);
    text-align: center;
}

.brochure-carousel__swiper {
    visibility: hidden;
    width: 100%;
    padding: 2rem 5.25rem;
    overflow: hidden;
}

.brochure-carousel.is-ready
.brochure-carousel__swiper {
    visibility: visible;
}

.brochure-carousel .swiper-wrapper {
    align-items: center;
}

.brochure-carousel .swiper-slide {
    display: flex;
    height: auto;
    min-height: 540px;
    align-items: center;
    justify-content: center;
}

/* Rendered PDF pages */

.brochure-carousel__page {
    position: relative;
    display: flex;
    width: 100%;
    min-height: 0;
    align-items: center;
    justify-content: center;
}

.brochure-carousel__page canvas {
    display: block;
    max-width: 100%;
    height: auto;
    background: #ffffff;
    box-shadow:
        0 1rem 2.5rem rgb(15 23 42 / 16%),
        0 0.15rem 0.5rem rgb(15 23 42 / 12%);
}

/*
 * The cover is rendered at half the width of a spread by the
 * JavaScript, keeping each physical brochure page approximately
 * the same visual size.
 */

.brochure-carousel__page--cover canvas {
    border-radius: 0.2rem;
}

/*
 * Landscape PDF pages contain two brochure pages side by side.
 */

.brochure-carousel__page--spread {
    position: relative;
}

/*
 * Subtle centre fold over each two-page spread.
 */

.brochure-carousel__page--spread::after {
    content: "";
    position: absolute;
    z-index: 2;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 1px;
    pointer-events: none;
    background:
        linear-gradient(
            to bottom,
            transparent 0%,
            rgb(0 0 0 / 16%) 8%,
            rgb(0 0 0 / 16%) 92%,
            transparent 100%
        );
    box-shadow:
        -4px 0 10px rgb(0 0 0 / 7%),
        4px 0 10px rgb(0 0 0 / 7%);
}

/* Loading state for individual pages */

.brochure-carousel__page--loading {
    min-height: 420px;
}

.brochure-carousel__page--loading::before {
    content: "";
    width: min(85%, 720px);
    aspect-ratio: 2 / 1;
    border-radius: 0.2rem;
    background:
        linear-gradient(
            90deg,
            #dde2e8 25%,
            #f1f3f5 50%,
            #dde2e8 75%
        );
    background-size: 200% 100%;
    animation: brochure-loading 1.35s infinite;
}

.brochure-carousel__page--cover.brochure-carousel__page--loading::before {
    width: min(44%, 520px);
    aspect-ratio: 1 / 1;
}

.brochure-carousel__page--loading canvas {
    display: none;
}

.brochure-carousel__page--loading::after {
    content: "Loading page…";
    position: absolute;
    z-index: 3;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--brochure-muted);
    font-size: 0.9rem;
}

/* Large stage navigation buttons */

.brochure-carousel__stage-button,
.brochure-carousel .swiper-button-prev,
.brochure-carousel .swiper-button-next {
    position: absolute;
    z-index: 5;
    top: 50%;
    display: grid;
    width: var(--brochure-control-size);
    height: var(--brochure-control-size);
    margin: 0;
    padding: 0;
    transform: translateY(-50%);
    place-items: center;
    border: 1px solid var(--brochure-border);
    border-radius: 50%;
    background: rgb(255 255 255 / 94%);
    color: var(--brochure-text);
    box-shadow: 0 0.3rem 1rem rgb(15 23 42 / 18%);
    cursor: pointer;
    transition:
        border-color 160ms ease,
        color 160ms ease,
        opacity 160ms ease,
        transform 160ms ease;
}

.brochure-carousel__stage-button:hover:not(:disabled),
.brochure-carousel .swiper-button-prev:hover:not(.swiper-button-disabled),
.brochure-carousel .swiper-button-next:hover:not(.swiper-button-disabled) {
    border-color: var(--brochure-accent);
    color: var(--brochure-accent);
}

.brochure-carousel__stage-button:hover:not(:disabled) {
    transform: translateY(-50%) scale(1.04);
}

.brochure-carousel__stage-button:disabled,
.brochure-carousel .swiper-button-disabled {
    opacity: 0.3;
    cursor: default;
}

.brochure-carousel__stage-button--previous,
.brochure-carousel .swiper-button-prev {
    left: 1rem;
}

.brochure-carousel__stage-button--next,
.brochure-carousel .swiper-button-next {
    right: 1rem;
}

.brochure-carousel__stage-button span {
    display: block;
    font-size: 2rem;
    line-height: 1;
    transform: translateY(-0.08rem);
}

/*
 * Hide Swiper's default arrow character when custom stage-button
 * markup is being used.
 */

.brochure-carousel__stage-button::after {
    content: none;
}

.brochure-carousel .swiper-button-prev::after,
.brochure-carousel .swiper-button-next::after {
    font-size: 1rem;
    font-weight: 700;
}

/* Controls beneath the viewer */

.brochure-carousel__controls {
    display: grid;
    grid-template-columns:
        auto
        minmax(6.5rem, auto)
        minmax(140px, 1fr)
        auto
        auto;
    align-items: center;
    gap: 0.75rem;
    padding: 0.8rem;
    border: 1px solid var(--brochure-border);
    border-top: 0;
    border-radius: 0 0 1rem 1rem;
    background: var(--brochure-surface);
}

.brochure-carousel__controls[hidden] {
    display: none;
}

.brochure-carousel__control-button {
    display: inline-flex;
    min-height: 2.65rem;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.55rem 0.85rem;
    border: 1px solid var(--brochure-border);
    border-radius: 0.5rem;
    background: var(--brochure-surface);
    color: var(--brochure-text);
    font: inherit;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    transition:
        border-color 160ms ease,
        color 160ms ease,
        background-color 160ms ease;
}

.brochure-carousel__control-button:hover:not(:disabled) {
    border-color: var(--brochure-accent);
    color: var(--brochure-accent);
}

.brochure-carousel__control-button:disabled {
    opacity: 0.4;
    cursor: default;
}

.brochure-carousel__page-counter {
    min-width: 7rem;
    color: var(--brochure-muted);
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    text-align: center;
    white-space: nowrap;
}

.brochure-carousel__scrubber-label {
    display: flex;
    min-width: 0;
    align-items: center;
}

.brochure-carousel__scrubber {
    width: 100%;
    min-width: 70px;
    margin: 0;
    accent-color: var(--brochure-accent);
    cursor: pointer;
}

.brochure-carousel .swiper-pagination {
    position: static;
    margin-top: 0.75rem;
    color: var(--brochure-muted);
    font-weight: 600;
    text-align: center;
}

/* Focus states */

.brochure-carousel__download:focus-visible,
.brochure-carousel button:focus-visible,
.brochure-carousel input:focus-visible {
    outline: 3px solid var(--brochure-accent);
    outline-offset: 3px;
}

/* Single-page PDFs */

.brochure-carousel.is-single-page
.brochure-carousel__stage-button,
.brochure-carousel.is-single-page
.brochure-carousel .swiper-button-prev,
.brochure-carousel.is-single-page
.brochure-carousel .swiper-button-next,
.brochure-carousel.is-single-page
.brochure-carousel__control-previous,
.brochure-carousel.is-single-page
.brochure-carousel__control-next,
.brochure-carousel.is-single-page
.brochure-carousel__scrubber-label {
    display: none;
}

/* Error state */

.brochure-carousel.is-error
.brochure-carousel__swiper,
.brochure-carousel.is-error
.brochure-carousel__stage-button,
.brochure-carousel.is-error
.brochure-carousel .swiper-button-prev,
.brochure-carousel.is-error
.brochure-carousel .swiper-button-next {
    display: none;
}

.brochure-carousel__error {
    padding: 1rem;
    border: 1px solid #b42318;
    border-radius: 0.5rem;
    background: #fef3f2;
    color: #912018;
}

/* Visually hidden accessible content */

.brochure-carousel__visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Full-screen presentation */

.brochure-carousel:fullscreen {
    display: flex;
    width: 100%;
    max-width: none;
    height: 100%;
    margin: 0;
    padding: 1rem;
    flex-direction: column;
    background: var(--brochure-background);
}

.brochure-carousel:fullscreen
.brochure-carousel__header {
    flex: 0 0 auto;
}

.brochure-carousel:fullscreen
.brochure-carousel__viewer {
    display: flex;
    min-height: 0;
    flex: 1 1 auto;
    align-items: center;
    border-radius: 0.75rem;
}

.brochure-carousel:fullscreen
.brochure-carousel__swiper {
    max-height: 100%;
    padding-block: 1rem;
}

.brochure-carousel:fullscreen
.swiper-slide {
    min-height: 0;
}

.brochure-carousel:fullscreen
.brochure-carousel__page canvas {
    width: auto !important;
    max-width: 100%;
    max-height: calc(100vh - 11rem);
    object-fit: contain;
}

.brochure-carousel:fullscreen
.brochure-carousel__controls {
    flex: 0 0 auto;
}

/* Tablet */

@media (max-width: 1023px) {
    .brochure-carousel__viewer {
        min-height: 510px;
    }

    .brochure-carousel .swiper-slide {
        min-height: 460px;
    }

    .brochure-carousel__swiper {
        padding-inline: 4.25rem;
    }

    .brochure-carousel__controls {
        grid-template-columns:
            auto
            minmax(6rem, auto)
            minmax(100px, 1fr)
            auto;
    }

    .brochure-carousel__fullscreen {
        grid-column: 1 / -1;
    }
}

/* Mobile */

@media (max-width: 767px) {
    .brochure-carousel {
        margin-block: 1rem;
    }

    .brochure-carousel__header {
        align-items: flex-start;
    }

    .brochure-carousel__title {
        font-size: 1.15rem;
    }

    .brochure-carousel__download {
        min-height: 2.4rem;
        padding: 0.55rem 0.7rem;
        font-size: 0.9rem;
    }

    .brochure-carousel__viewer {
        min-height: 340px;
        border-radius: 0.65rem;
    }

    .brochure-carousel__swiper {
        padding: 1rem 0.75rem;
    }

    .brochure-carousel .swiper-slide {
        min-height: 310px;
    }

    .brochure-carousel__page--loading {
        min-height: 280px;
    }

    .brochure-carousel__page--loading::before {
        width: 94%;
    }

    .brochure-carousel__page--cover.brochure-carousel__page--loading::before {
        width: 54%;
    }

    /*
     * Touch swiping is the primary mobile interaction.
     * Toolbar controls remain available beneath the viewer.
     */

    .brochure-carousel__stage-button,
    .brochure-carousel .swiper-button-prev,
    .brochure-carousel .swiper-button-next {
        display: none;
    }

    .brochure-carousel__controls {
        grid-template-columns:
            auto
            minmax(5.5rem, auto)
            minmax(60px, 1fr)
            auto;
        gap: 0.4rem;
        padding: 0.6rem;
        border-radius: 0 0 0.65rem 0.65rem;
    }

    .brochure-carousel__control-label {
        display: none;
    }

    .brochure-carousel__control-button {
        min-width: 2.7rem;
        padding-inline: 0.65rem;
    }

    .brochure-carousel__page-counter {
        min-width: 5.5rem;
        font-size: 0.82rem;
    }

    .brochure-carousel__fullscreen {
        grid-column: 1 / -1;
    }
}

/* Very small screens */

@media (max-width: 420px) {
    .brochure-carousel__header {
        display: block;
    }

    .brochure-carousel__download {
        margin-top: 0.75rem;
    }

    .brochure-carousel__viewer {
        min-height: 290px;
    }

    .brochure-carousel .swiper-slide {
        min-height: 260px;
    }

    .brochure-carousel__controls {
        grid-template-columns: auto 1fr auto;
    }

    .brochure-carousel__page-counter {
        grid-column: 2;
        grid-row: 1;
    }

    .brochure-carousel__scrubber-label {
        grid-column: 1 / -1;
        grid-row: 2;
    }

    .brochure-carousel__control-previous {
        grid-column: 1;
        grid-row: 1;
    }

    .brochure-carousel__control-next {
        grid-column: 3;
        grid-row: 1;
    }

    .brochure-carousel__fullscreen {
        grid-column: 1 / -1;
        grid-row: 3;
    }
}

/* Reduced-motion preference */

@media (prefers-reduced-motion: reduce) {
    .brochure-carousel *,
    .brochure-carousel *::before,
    .brochure-carousel *::after {
        scroll-behaviour: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@keyframes brochure-loading {
    from {
        background-position: 200% 0;
    }

    to {
        background-position: -200% 0;
    }
}
.brochure-carousel .swiper-zoom-container {
    display: flex;
    width: 100%;
    min-height: inherit;
    align-items: center;
    justify-content: center;
}

.brochure-carousel .swiper-slide-zoomed {
    cursor: grab;
}

.brochure-carousel .swiper-slide-zoomed:active {
    cursor: grabbing;
}