/* Scoped to the course image viewer and standard primitive lesson. */
#modeling-basic .geometry-selector {
    position: relative;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
    max-width: 660px;
    margin: 22px 0 0;
}
#modeling-basic .geometry-btn {
    min-width: 0;
    width: auto;
    height: 106px;
    padding: 8px 4px;
    border-radius: 8px;
    color: #c3cede;
    background: #181e2c;
    font: inherit;
    transform: none;
    box-shadow: none;
}
#modeling-basic .geometry-btn.active { border-color: #82b4ff; background: #233348; }
#modeling-basic .geometry-btn span { font-size: 13px; white-space: nowrap; }
#modeling-basic .geometry-btn .geometry-thumbnail { display: block; width: 100%; height: 62px; margin: 0; }
.geometry-selector > canvas { position: absolute; inset: 0; pointer-events: none; }
.geometry-workspace { width: 100%; min-width: 0; margin-top: 16px; }
.geometry-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 8px; padding: 10px 0; border-bottom: 1px solid #293346; }
.geometry-toolbar label { display: inline-flex; align-items: center; gap: 6px; margin-right: 8px; font-size: 13px; white-space: nowrap; color: #c3cede; }
.geometry-toolbar input { accent-color: #82b4ff; width: 16px; height: 16px; }
.geometry-toolbar button, .image-modal-toolbar button { display: grid; place-items: center; flex: 0 0 36px; width: 36px; height: 36px; border: 1px solid #3e485b; border-radius: 6px; background: #202737; color: #e8eef6; cursor: pointer; font-size: 14px; }
.geometry-toolbar button:hover, .image-modal-toolbar button:hover { background: #354159; }
.geometry-workspace :focus-visible, #modeling-basic .geometry-btn:focus-visible, .image-modal :focus-visible, img[data-enlarge]:focus-visible { outline: 2px solid #9dc7ff; outline-offset: 3px; }
#geometry-viewport { position: relative; width: 100%; height: 390px; overflow: hidden; cursor: grab; touch-action: none; background: #101521; }
#geometry-viewport:active { cursor: grabbing; }
#geometry-viewport canvas { display: block; width: 100%; height: 100%; }
#geometry-status { position: absolute; inset: 0; display: grid; place-items: center; padding: 24px; margin: 0; text-align: center; pointer-events: none; font-size: 14px; }
#geometry-status[hidden], #modeling-basic .geometry-display[hidden] { display: none; }
.geometry-detail { display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, 1fr); gap: 20px; padding: 18px 0 6px; border-top: 1px solid #293346; }
.geometry-detail h5 { margin: 0 0 8px; font-size: 18px; color: #edf2f7; }
.geometry-detail p { color: #a9bbd9; font-size: 13px; margin: 0; }
#geometry-parameters { display: grid; gap: 10px; }
.geometry-parameter { display: grid; grid-template-columns: 48px minmax(50px, 1fr) 42px; align-items: center; gap: 10px; font-size: 13px; color: #c3cede; }
.geometry-parameter input { min-width: 0; width: 100%; accent-color: #82b4ff; }
.geometry-parameter output { text-align: right; font-variant-numeric: tabular-nums; }
img[data-enlarge] { cursor: zoom-in; }
.image-modal { border: 0; width: 100%; max-width: 100%; height: 100%; max-height: 100%; margin: 0; padding: 24px; color: #fff; background: rgba(7, 9, 14, .94); }
.image-modal[open] { display: flex; }
.image-modal::backdrop { background: rgba(0, 0, 0, .8); }
.image-modal .image-modal-content { display: flex; flex-direction: column; width: 100%; height: 100%; max-width: 1800px; max-height: 100%; margin: auto; }
.image-modal-toolbar { flex: 0 0 auto; display: flex; align-items: center; gap: 8px; padding-bottom: 12px; }
.image-modal .image-modal-caption { flex: 1; min-width: 0; text-align: left; font-size: 14px; line-height: 1.5; margin: 0; overflow-wrap: anywhere; }
.image-modal .image-modal-close { position: static; font-size: 18px; }
.image-modal-viewport { position: relative; flex: 1; min-height: 0; overflow: auto; overscroll-behavior: contain; display: flex; align-items: safe center; justify-content: safe center; }
.image-modal .image-modal-viewport img { flex: 0 0 auto; display: block; width: auto; height: auto; max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 0; box-shadow: none; }
.image-modal .image-modal-viewport.is-zoomed img { max-width: none; max-height: none; }
.image-modal .image-modal-viewport img[hidden] { display: none; }
#image-load-status { position: absolute; top: 50%; left: 0; right: 0; text-align: center; padding: 12px; font-size: 14px; }
#image-load-status[hidden] { display: none; }
@media (max-width: 700px) {
    #modeling-basic .geometry-selector { gap: 5px; }
    #modeling-basic .geometry-btn { height: 90px; padding: 4px 0; }
    #modeling-basic .geometry-btn span { font-size: 12px; }
    #modeling-basic .geometry-btn .geometry-thumbnail { height: 54px; }
    #geometry-viewport { height: 310px; }
    .geometry-detail { grid-template-columns: 1fr; gap: 16px; }
    .geometry-toolbar { gap: 6px; justify-content: flex-start; }
    .geometry-toolbar label { margin-right: 4px; }
    .image-modal { padding: 12px; }
    .image-modal-toolbar { flex-wrap: wrap; gap: 6px; }
    .image-modal .image-modal-caption { flex-basis: 100%; }
    .image-modal .image-modal-close { margin-left: auto; }
}
@media (prefers-reduced-motion: reduce) {
    #modeling-basic *, .image-modal * { transition: none !important; }
}