/* Theme-wide image viewer enhancements.
   Loaded directly by default.hbs, so no Gulp rebuild is required. */

/* Shared Kangina navigation tile. Cover, Gallery and the desktop image viewer
   reuse these tokens while keeping their context-specific interaction. */
:root {
    --kangina-nav-size: 42px;
    --kangina-nav-half-size: -21px;
    --kangina-nav-surface: rgba(255, 255, 255, 0.9);
    --kangina-nav-color: #15171a;
    --kangina-nav-border: 1px solid rgba(21, 23, 26, 0.12);
    --kangina-nav-shadow: 0 2px 14px rgba(0, 0, 0, 0.12);
    --kangina-nav-transition: opacity 0.2s ease, background-color 0.2s ease;
}

.gh-article img.is-kangina-viewer-ready[role="button"] {
    cursor: zoom-in;
}

/* Mouse clicks should not leave the browser's default black focus frame.
   Keyboard navigation keeps a deliberate, offset focus indicator. */
.is-kangina-viewer-ready:focus {
    outline: none;
}

.is-kangina-viewer-ready:focus-visible {
    outline: 1px solid rgba(21, 23, 26, 0.5);
    outline-offset: 4px;
}

.pswp .pswp__img,
.pswp.pswp--zoom-allowed .pswp__img,
.pswp.pswp--zoomed-in .pswp__img {
    cursor: zoom-out !important;
}

.pswp .pswp__button--fs,
.pswp .pswp__button--share,
.pswp .pswp__button--zoom {
    display: none !important;
}

/* PhotoSwipe keeps its own modal/idle behaviour, but its desktop arrows use
   the same visual component as the Gallery controls. Match .pswp
   immediately rather than waiting for its runtime pswp--has_mouse class, so
   the default sprite can never paint before the custom tile. */
@media (hover: hover) and (pointer: fine) {
    .pswp .pswp__button--arrow--left:disabled,
    .pswp .pswp__button--arrow--right:disabled {
        opacity: 0 !important;
        pointer-events: none;
    }

    .pswp .pswp__button--arrow--left,
    .pswp .pswp__button--arrow--right {
        top: 50%;
        box-sizing: border-box;
        width: var(--kangina-nav-size);
        height: var(--kangina-nav-size);
        margin-top: var(--kangina-nav-half-size);
        border: var(--kangina-nav-border);
        border-radius: 0;
        background: var(--kangina-nav-surface) !important;
        color: var(--kangina-nav-color);
        box-shadow: var(--kangina-nav-shadow);
        transition: var(--kangina-nav-transition);
    }

    .pswp .pswp__button--arrow--left {
        left: 18px;
    }

    .pswp .pswp__button--arrow--right {
        right: 18px;
    }

    .pswp .pswp__button--arrow--left::before,
    .pswp .pswp__button--arrow--right::before {
        position: absolute;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 100%;
        background: none !important;
        color: var(--kangina-nav-color);
        font-family: Arial, Helvetica, sans-serif;
        font-size: 20px;
        font-weight: 400;
        line-height: 1;
    }

    .pswp .pswp__button--arrow--left::before {
        content: "←";
    }

    .pswp .pswp__button--arrow--right::before {
        content: "→";
    }
}
/* Desktop article album. Mobile and touch devices continue to use the
   original PhotoSwipe presentation without any layout overrides. */
@media (min-width: 768px) and (hover: hover) and (pointer: fine) {
    html.kangina-album-open,
    html.kangina-album-open body {
        overflow: hidden !important;
    }

    .kangina-album {
        --kangina-album-edge: clamp(24px, 2vw, 44px);
        --kangina-album-info-space: clamp(112px, 14vh, 156px);
        --kangina-album-meta-bottom: clamp(24px, 2vw, 44px);
        position: fixed;
        inset: 0;
        z-index: 4000000;
        overflow: hidden;
        background: #fff;
        color: #15171a;
        font-family: var(--gh-font-body, var(--font-sans));
        opacity: 0;
        transition: opacity 0.2s ease;
    }

    .kangina-album.is-visible {
        opacity: 1;
    }

    .kangina-album__frame {
        position: absolute;
        top: var(--kangina-album-edge);
        right: var(--kangina-album-edge);
        bottom: var(--kangina-album-info-space);
        left: var(--kangina-album-edge);
    }

    .kangina-album__stage {
        position: relative;
        width: 100%;
        height: 100%;
    }

    .kangina-album__image {
        position: absolute;
        top: 50%;
        left: 50%;
        display: block;
        width: auto;
        max-width: 100%;
        height: auto;
        max-height: 100%;
        object-fit: contain;
        cursor: zoom-out;
        opacity: 1;
        transform: translate(-50%, -50%);
        transition: opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1);
        will-change: opacity;
    }

    .kangina-album__image.is-outgoing {
        opacity: 0;
    }

    .kangina-album__image.is-incoming {
        opacity: 0;
    }

    .kangina-album__image.is-incoming.is-active {
        opacity: 1;
    }

    .kangina-album__caption {
        position: absolute;
        top: var(
            --kangina-album-caption-top,
            calc(100vh - var(--kangina-album-info-space) + 12px)
        );
        left: 50%;
        width: min(
            720px,
            calc(100vw - (var(--kangina-album-edge) * 2))
        );
        max-height: 4.5em;
        overflow: hidden;
        color: #4f4f4f;
        font-size: 1.3rem;
        font-weight: 500;
        line-height: 1.5;
        letter-spacing: -0.005em;
        text-align: center;
        transform: translateX(-50%);
    }

    .kangina-album__caption > :first-child {
        margin-top: 0;
    }

    .kangina-album__caption > :last-child {
        margin-bottom: 0;
    }

    .kangina-album__caption a {
        color: inherit;
        text-decoration: underline;
    }

    .kangina-album__meta {
        position: absolute;
        right: var(--kangina-album-edge);
        bottom: var(--kangina-album-meta-bottom);
        display: flex;
        gap: 18px;
        align-items: baseline;
        max-width: min(50vw, 680px);
        color: #747474;
        font-size: 1.2rem;
        font-weight: 400;
        line-height: 1.4;
        letter-spacing: 0.005em;
        white-space: nowrap;
    }

    .kangina-album__title {
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .kangina-album__position {
        flex: 0 0 auto;
        font-variant-numeric: tabular-nums;
    }

    .kangina-album__caption,
    .kangina-album__meta {
        opacity: 1;
        transition: opacity 0.24s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .kangina-album.is-leaving .kangina-album__caption,
    .kangina-album.is-leaving .kangina-album__meta {
        opacity: 0;
        transition-duration: 0.16s;
        transition-timing-function: ease-in;
    }

    .kangina-album.is-entering .kangina-album__caption,
    .kangina-album.is-entering .kangina-album__meta {
        opacity: 0;
        transition: none;
    }

    .kangina-album__side {
        position: absolute;
        top: var(--kangina-album-edge);
        bottom: var(--kangina-album-info-space);
        z-index: 4;
        width: 18%;
        min-width: 96px;
        padding: 0;
        cursor: pointer;
        background: transparent;
        border: 0;
        outline: 0;
    }

    .kangina-album__side--prev {
        left: 0;
    }

    .kangina-album__side--next {
        right: 0;
    }

    .kangina-album__side:disabled {
        display: none;
    }

    .kangina-album__arrow {
        position: absolute;
        top: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        box-sizing: border-box;
        width: var(--kangina-nav-size);
        height: var(--kangina-nav-size);
        background: var(--kangina-nav-surface);
        border: var(--kangina-nav-border);
        box-shadow: var(--kangina-nav-shadow);
        color: var(--kangina-nav-color);
        font-family: Arial, Helvetica, sans-serif;
        font-size: 20px;
        font-weight: 400;
        line-height: 1;
        opacity: 0;
        transform: translateY(-50%);
        transition: opacity 0.2s ease, background-color 0.2s ease;
    }

    .kangina-album__side--prev .kangina-album__arrow {
        left: calc(var(--kangina-album-edge) + 14px);
    }

    .kangina-album__side--next .kangina-album__arrow {
        right: calc(var(--kangina-album-edge) + 14px);
    }

    .kangina-album__side:hover .kangina-album__arrow,
    .kangina-album__side:focus-visible .kangina-album__arrow {
        opacity: 1;
    }

    .kangina-album__loader {
        position: absolute;
        top: 50%;
        left: 50%;
        width: 20px;
        height: 20px;
        margin: -10px 0 0 -10px;
        border: 2px solid rgba(21, 23, 26, 0.12);
        border-top-color: rgba(21, 23, 26, 0.64);
        border-radius: 50%;
        opacity: 0;
        pointer-events: none;
        animation: kangina-album-spin 0.72s linear infinite;
    }

    .kangina-album__stage.is-loading .kangina-album__loader {
        opacity: 1;
    }
}

@keyframes kangina-album-spin {
    to {
        transform: rotate(360deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .kangina-album,
    .kangina-album__image,
    .kangina-album__caption,
    .kangina-album__meta,
    .kangina-album__arrow {
        transition: none;
    }

    .kangina-album__loader {
        animation: none;
    }
}