/* Outside the gallery's auto-hiding controls so there is always a way home. */
#portfolio-return {
    position: fixed;
    top: max(15px, env(safe-area-inset-top));
    left: max(15px, env(safe-area-inset-left));
    z-index: 10050;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    box-sizing: border-box;
    padding: 10px 14px;
    border: 1px solid #ffffff50;
    border-radius: 24px;
    background: #08121eef;
    color: #f0f7fc;
    font: 600 14px/1.4 'Roboto', sans-serif;
    text-decoration: none;
    pointer-events: auto;
    touch-action: manipulation;
}
#portfolio-return:hover { background: #193349; color: white; opacity: 1; }
#portfolio-return:focus-visible { outline: 2px solid #b8eaff; outline-offset: 3px; }
/* Keep portfolio navigation in its own row, clear of gallery controls. */
@media (max-width: 768px) {
    body:has(#portfolio-return) {
        --gallery-controls-top: calc(max(15px, env(safe-area-inset-top)) + 56px);
    }
    body:has(#portfolio-return) #title {
        top: var(--gallery-controls-top);
        box-sizing: border-box;
    }
    body:has(#portfolio-return) #controls-container,
    body:has(#portfolio-return) #viewer-controls-container {
        top: var(--gallery-controls-top);
    }
    body:has(#controls-container) #title { padding-right: 76px; }
    body:has(#portfolio-return) #top-controls {
        top: calc(var(--gallery-controls-top) + 48px);
        max-width: calc(100vw - 24px);
        flex-wrap: wrap;
        gap: 8px;
    }
    body:has(#top-controls) #gallery-2d { padding-top: calc(var(--gallery-controls-top) + 104px); }
    body:has(#portfolio-return) #viewer-controls {
        top: var(--gallery-controls-top);
        left: max(12px, env(safe-area-inset-left));
        right: max(12px, env(safe-area-inset-right));
        flex-wrap: wrap;
        justify-content: flex-end;
        gap: 6px;
    }
    #ui-layer:has(#controls-container.expanded),
    #imageViewer:has(#viewer-controls-container.expanded) { z-index: 12000; }
    #controls-container.expanded,
    #viewer-controls-container.expanded { z-index: 12001; }
}
/* Keep the gallery's FPS readout below the persistent return control. */
body:has(#portfolio-return) #fps-counter {
    top: calc(max(15px, env(safe-area-inset-top)) + 56px) !important;
    left: max(15px, env(safe-area-inset-left)) !important;
}
#portfolio-inspector {
    position: fixed; right: max(16px, env(safe-area-inset-right));
    bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 4501;
    min-height: 48px; padding: 12px 18px; border: 1px solid #a4d8f0;
    border-radius: 24px; background: #102638; color: white;
    font: 600 14px 'Roboto', sans-serif; pointer-events: auto;
}
#portfolio-inspector[hidden] { display: none; }
#portfolio-inspector:focus-visible { outline: 2px solid #b8eaff; outline-offset: 3px; }
@media (max-width: 768px) {
    #portfolio-return { padding: 10px 12px; font-size: 13px; }
    #portfolio-inspector {
        top: max(15px, env(safe-area-inset-top));
        bottom: auto;
        right: max(12px, env(safe-area-inset-right));
        min-height: 44px;
        padding: 10px 12px;
        font-size: 13px;
    }
}