/* Zoom button + lightbox for images and Mermaid diagrams (see zoom.js). */

.zoomable-wrap {
    position: relative;
    display: inline-block;
    max-width: 100%;
}

/* Diagrams: fill the content column and center, instead of Mermaid's tiny
   intrinsic size (its inline `max-width:<px>` is overridden here). */
.zoomable-wrap--block {
    display: block;
    text-align: center;
}

.zoomable-wrap--block pre.mermaid {
    margin: 0 auto;
}

.zoomable-wrap--block pre.mermaid svg {
    max-width: 100% !important;
    width: 100%;
    height: auto;
}

.zoom-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    border: 1px solid var(--sidebar-non-existant, rgba(0, 0, 0, 0.15));
    border-radius: 6px;
    background: var(--bg, #fff);
    color: var(--fg, #333);
    cursor: zoom-in;
    opacity: 0;
    transition: opacity 0.15s ease, background 0.15s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
    z-index: 2;
}

.zoomable-wrap:hover .zoom-btn,
.zoom-btn:focus-visible {
    opacity: 0.95;
}

.zoom-btn:hover {
    background: var(--theme-hover, #e6e6e6);
}

/* Touch devices have no hover -- keep the button visible. */
@media (hover: none) {
    .zoom-btn {
        opacity: 0.9;
    }
}

/* Lightbox overlay. */
html.zoom-open,
html.zoom-open body {
    overflow: hidden;
}

.zoom-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.82);
    backdrop-filter: blur(2px);
}

.zoom-stage {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    cursor: grab;
}

.zoom-stage.grabbing {
    cursor: grabbing;
}

.zoom-content {
    transform-origin: center center;
    transition: transform 0.05s linear;
    user-select: none;
    -webkit-user-drag: none;
    background: #fff;
    border-radius: 6px;
}

/* Size the zoomed image/diagram to fit the viewport initially. */
.zoom-stage img.zoom-content,
.zoom-stage pre.zoom-content svg,
.zoom-stage svg.zoom-content {
    max-width: 92vw;
    max-height: 92vh;
    width: auto;
    height: auto;
}

.zoom-stage pre.zoom-content {
    margin: 0;
    padding: 16px;
    background: #fff;
    border: none;
    box-shadow: none;
}

.zoom-close {
    position: absolute;
    top: 16px;
    right: 20px;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
    z-index: 1001;
}

.zoom-close:hover {
    background: rgba(255, 255, 255, 0.25);
}

.zoom-hint {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.8rem;
    pointer-events: none;
    user-select: none;
}