/* sphinx-togglebutton places its button inside the admonition title
   bar. Position it flush-right inside the title and keep the chevron
   on the same line regardless of theme. */
.admonition.toggle > .admonition-title {
    position: relative;
    padding-right: 9em;
    cursor: pointer;
}

.admonition.toggle > .admonition-title > button.toggle-button {
    position: absolute;
    top: 50%;
    right: 0.7em;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    gap: 0.35em;
    color: inherit;
    background: transparent;
    border: 0;
}

.admonition.toggle > .admonition-title > button.toggle-button::before {
    color: inherit;
    opacity: 0.9;
}

/* Fixed GitHub link in the top-right corner. Shibuya exposes its own
   header GitHub icon via `github_url`, so this chip is redundant under
   shibuya; hide it here and re-enable per theme if it's ever needed. */
a.gh-corner-link {
    display: none;
}

/* Dark-mode SVG rendering.
   Our embedded SVG diagrams were drawn for a light background (pastel
   fills, dark text). On shibuya's dark theme they stand out as bright
   blocks. Rather than maintain per-SVG dark palettes, invert luminance
   at render time and rotate hues 180° so colours stay roughly in their
   original family (blue stays blue, etc.). invert(0.92) avoids pure
   white → pure black, which reads slightly softer.

   Targets shibuya's explicit dark toggle (`data-color-mode="dark"`) and
   also applies under OS-level dark mode when shibuya is in its default
   auto setting (`data-color-mode="auto"` or unset). */
[data-color-mode="dark"] img[src$=".svg"] {
    filter: invert(0.92) hue-rotate(180deg);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-color-mode="light"]) img[src$=".svg"] {
        filter: invert(0.92) hue-rotate(180deg);
    }
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.gallery-grid--teaser {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.gallery-card {
    margin: 0;
    overflow: hidden;
    border: 1px solid rgba(127, 127, 127, 0.22);
    border-radius: 18px;
    background: rgba(127, 127, 127, 0.05);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.08);
}

.gallery-card img {
    display: block;
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    background: rgba(127, 127, 127, 0.08);
}

.gallery-card figcaption {
    display: grid;
    gap: 0.25rem;
    padding: 0.9rem 1rem 1rem;
}

.gallery-card figcaption strong {
    font-size: 0.98rem;
}

.gallery-card figcaption span {
    font-size: 0.92rem;
    line-height: 1.45;
    opacity: 0.78;
}

@media (hover: hover) {
    .gallery-card {
        transition: transform 160ms ease, box-shadow 160ms ease,
            border-color 160ms ease;
    }

    .gallery-card:hover {
        transform: translateY(-2px);
        border-color: rgba(127, 127, 127, 0.34);
        box-shadow: 0 18px 34px rgba(0, 0, 0, 0.12);
    }
}

/* Tutorial thumbnails. We target any link that wraps an <img> whose
   filename ends in -opt.jpg so Markdown's [![alt](path)](url) renders
   with a circular dark backdrop and a white play triangle. Pure CSS,
   no baked-in graphics, no custom class required (which lets Sphinx
   continue to handle the image-copy pipeline normally).

   The .tutorial-grid wrapper lays the cards out two-up on desktop,
   collapsing to a single column on narrow viewports. */
.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 1.25rem;
    margin: 1.5rem 0;
}

.tutorial-grid figure {
    margin: 0;
    display: grid;
    gap: 0.4rem;
}

.tutorial-grid figcaption {
    display: grid;
    gap: 0.15rem;
    line-height: 1.35;
}

.tutorial-grid figcaption strong {
    font-weight: 600;
    font-size: 1rem;
}

.tutorial-grid figcaption span {
    font-size: 0.9rem;
    opacity: 0.78;
}

.tutorial-grid p {
    margin: 0;
}

@media (max-width: 720px) {
    .tutorial-grid {
        grid-template-columns: 1fr;
    }
}

a:has(> img[src$="-opt.jpg"]) {
    position: relative;
    display: inline-block;
    line-height: 0;
    border-radius: 12px;
    overflow: hidden;
}

a:has(> img[src$="-opt.jpg"]) > img {
    display: block;
    max-width: 100%;
    height: auto;
}

a:has(> img[src$="-opt.jpg"])::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 88px;
    height: 88px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    transform: translate(-50%, -50%);
    pointer-events: none;
    transition: background 160ms ease, transform 160ms ease;
}

a:has(> img[src$="-opt.jpg"])::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-left: 28px solid #fff;
    border-top: 18px solid transparent;
    border-bottom: 18px solid transparent;
    transform: translate(-35%, -50%);
    pointer-events: none;
    transition: transform 160ms ease;
}

@media (hover: hover) {
    a:has(> img[src$="-opt.jpg"]):hover::before {
        background: rgba(0, 0, 0, 0.78);
        transform: translate(-50%, -50%) scale(1.06);
    }

    a:has(> img[src$="-opt.jpg"]):hover::after {
        transform: translate(-35%, -50%) scale(1.06);
    }
}