.model-viewer-3d-block {
    position: relative;
    width: 100%;
    margin: 0 auto;
}

.model-viewer-3d-heading {
    margin-bottom: 16px;
}

.model-viewer-3d-wrap {
    position: relative;
}

.model-viewer-3d-block model-viewer {
    width: 100%;
    min-height: 300px;
    --poster-color: transparent;
}

.model-viewer-3d-block model-viewer::part(default-progress-bar) {
    background-color: #4a7c2e;
}

/* Hide model-viewer's default AR button — we use native <a rel="ar"> for iOS */
.model-viewer-3d-block model-viewer::part(default-ar-button) {
    display: none;
}

/* Native AR link — hidden on desktop, shown on mobile */
.model-viewer-ar-link {
    display: none;
    position: absolute;
    bottom: 16px;
    right: 16px;
    z-index: 5;
    text-decoration: none;
}

.model-viewer-ar-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #fff;
    color: #333;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

@media (hover: none) and (pointer: coarse) {
    .model-viewer-ar-link {
        display: block;
    }
}

/* Annotation hotspots */
.model-viewer-hotspot {
    position: relative;
    display: block;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    width: 0;
    height: 0;
    --hotspot-color: #4a7c2e;
}

.model-viewer-hotspot-dot {
    position: absolute;
    top: -7px;
    left: -7px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--hotspot-color);
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease;
}

.model-viewer-hotspot:hover .model-viewer-hotspot-dot {
    transform: scale(1.3);
}

.model-viewer-hotspot-label {
    position: absolute;
    top: 50%;
    left: 16px;
    transform: translateY(-50%);
    background: #fff;
    color: #333;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.3;
    padding: 4px 10px;
    border-radius: 4px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
    white-space: nowrap;
    pointer-events: none;
}

/* Hide label by default, show on hover/focus */
.model-viewer-hotspot .model-viewer-hotspot-label {
    opacity: 0;
    transition: opacity 0.2s ease;
}

.model-viewer-hotspot:hover .model-viewer-hotspot-label,
.model-viewer-hotspot:focus .model-viewer-hotspot-label {
    opacity: 1;
}

/* Hide hotspots when occluded by model */
.model-viewer-hotspot[data-visibility-attribute="hidden"] {
    opacity: 0;
    pointer-events: none;
}

/* Admin coordinate helper toast */
.model-viewer-coord-toast {
    position: absolute;
    bottom: 12px;
    left: 12px;
    right: 12px;
    background: rgba(0, 0, 0, 0.85);
    color: #0f0;
    font-family: monospace;
    font-size: 12px;
    padding: 10px 14px;
    border-radius: 4px;
    z-index: 10;
    text-align: center;
}

@media (max-width: 767px) {
    .model-viewer-3d-block model-viewer {
        min-height: 250px;
    }

    /* Always show labels on mobile (no hover) */
    .model-viewer-hotspot .model-viewer-hotspot-label {
        opacity: 1;
        transform: translateX(0);
    }
}