/* 3D Tree — project-specific styles (layout mirrors the Flappy Bird stage) */

#tree-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
}

/* Viewer box. Desktop: 16:9, as wide as the content column allows while still
   fitting the viewport height. */
#tree-frame {
    position: relative;
    width: min(100%, calc((100vh - 220px) * 16 / 9));
    aspect-ratio: 16 / 9;
    background: #1f2a24;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
    line-height: 0;
}

/* Mobile: same portrait ratio as the Flappy Bird canvas (288 x 512). */
@media (max-width: 736px), (hover: none) and (pointer: coarse) and (orientation: portrait) {
    #tree-frame {
        width: min(100%, calc((100svh - 160px) * 288 / 512));
        aspect-ratio: 288 / 512;
    }
}

#tree-embed {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

/* Shown until an embed link is set in 3D_Tree.js. */
#tree-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    line-height: 1.4;
    text-align: center;
}

#tree-frame:fullscreen {
    width: 100%;
    height: 100%;
    aspect-ratio: auto;
    border-radius: 0;
    background: #000;
}

/* CSS-only fullscreen fallback for iOS Safari (no element Fullscreen API). */
#tree-frame.tree-fake-fullscreen {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    aspect-ratio: auto;
    border-radius: 0;
    background: #000;
    z-index: 1000;
}

/* Exit button only visible while the CSS fallback is active. */
#tree-exit-fullscreen {
    display: none;
    position: absolute;
    top: calc(10px + env(safe-area-inset-top, 0px));
    right: calc(10px + env(safe-area-inset-right, 0px));
    z-index: 10;
    cursor: pointer;
}
#tree-frame.tree-fake-fullscreen #tree-exit-fullscreen { display: block; }

.tree-controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

#tree-fullscreen {
    cursor: pointer;
}

.tree-hint {
    font-size: 0.8rem;
    opacity: 0.6;
    margin: 0;
    text-align: center;
}