/* The compact companion viewer is isolated from the lesson and Morph surfaces. */
.m1-model-viewer{--mv-navy:#102b34;--mv-teal:#006e82;--mv-line:#d7e2e6;--mv-ink:#173946;--mv-muted:#5b7079;color:var(--mv-ink);font:14px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#fff;overflow:hidden;min-width:0}
.m1-model-viewer *{box-sizing:border-box}
.m1-model-viewer button,.m1-model-viewer input{font:inherit}
.m1-model-viewer p{overflow-wrap:anywhere}
.m1-model-viewer button{appearance:none;border:1px solid var(--mv-line);background:#fff;border-radius:7px;color:var(--mv-ink);cursor:pointer;min-height:34px;padding:6px 10px;font-size:12px;font-weight:650;line-height:1.25;transition:background .15s,border-color .15s}
.m1-model-viewer button:hover{background:#edf7f8;border-color:#98c0c9}
.m1-model-viewer button:focus-visible,.m1-model-viewer a:focus-visible,.m1-model-viewer input:focus-visible,.m1-model-viewer canvas:focus-visible,.m1-model-viewer summary:focus-visible{outline:3px solid #e0a934;outline-offset:3px}
.m1-model-viewer button:disabled{cursor:default;opacity:.45}
.m1-model-viewer button[aria-pressed=true]{background:var(--mv-teal);border-color:var(--mv-teal);color:#fff}
.m1-model-views{display:flex;flex-wrap:wrap;gap:5px;padding:0 13px 12px}
.m1-model-views button{flex:1 0 auto;padding:5px 8px;min-height:32px;font-size:11px}
.m1-model-canvas-wrap{position:relative;min-height:280px;height:clamp(280px,42vh,400px);background:var(--mv-navy);overflow:hidden;isolation:isolate}
.m1-model-canvas-wrap canvas{display:block;width:100%;height:100%;touch-action:none}
.m1-model-viewer .m1-model-expand{position:absolute;top:10px;right:10px;z-index:3;background:rgba(16,43,52,.9);color:#fff;border-color:#77929c;min-height:34px;font-size:11px;box-shadow:0 2px 10px #0002}
.m1-model-viewer .m1-model-expand:hover{background:#214957;border-color:#b4d0d7}
.m1-model-picked{position:absolute;bottom:10px;left:10px;right:10px;width:max-content;max-width:calc(100% - 20px);padding:6px 10px;border:1px solid #7fbcc8;border-radius:7px;background:rgba(16,43,52,.93);color:#e5f8fa;font-size:12px;line-height:1.4;pointer-events:none}
.m1-model-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;padding:24px;text-align:center;color:#fff;background:var(--mv-navy);z-index:2}
.m1-model-placeholder[hidden]{display:none}
.m1-model-poster{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.32;pointer-events:none}
.m1-model-placeholder::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(16,43,52,.95),rgba(16,43,52,.15) 95%);z-index:-1}
.m1-model-placeholder>*:not(img){position:relative;z-index:1}
.m1-model-placeholder strong{font-size:19px;max-width:25ch}
.m1-model-placeholder p{max-width:32ch;margin:0;font-size:12px;line-height:1.6;color:#d8e9ed}
.m1-model-viewer .m1-model-primary{background:#fff;border-color:#fff;color:var(--mv-navy);font-size:13px;padding:10px 18px;min-height:42px}
.m1-model-viewer .m1-model-primary:hover{background:#e7f4f6}
.m1-model-viewer .m1-model-cancel{background:transparent;color:#fff;border-color:#94adb5}
.m1-model-viewer progress{width:min(100%,230px);height:7px;border:0;accent-color:#6fc7d7;border-radius:10px;overflow:hidden;background:#34545e}
.m1-model-viewer progress::-webkit-progress-bar{background:#34545e}
.m1-model-viewer progress::-webkit-progress-value{background:#6fc7d7}
.m1-model-viewer progress::-moz-progress-bar{background:#6fc7d7}
.m1-model-controls{padding:12px 13px;border-bottom:1px solid var(--mv-line);display:grid;gap:10px}
.m1-model-modes,.m1-model-camera,.m1-model-tools{display:flex;align-items:center;flex-wrap:wrap;gap:5px}
.m1-model-tools button{flex:1;padding:7px 5px;font-size:11px}
.m1-model-tools button[data-model-action=reset]{color:var(--mv-muted)}
.m1-model-gesture{margin:-3px 0 0;color:var(--mv-muted);font-size:10px;line-height:1.5}
.m1-model-modes button{flex:1}
.m1-model-camera button{flex:1;min-width:29px;padding:6px 5px;min-height:33px;font-size:13px}
.m1-model-modes button[data-model-action=undo]{font-size:10px;flex:1.4;background:#f4f8f9}
.m1-model-opacity{display:grid;grid-template-columns:auto 1fr 34px;gap:9px;align-items:center;color:var(--mv-muted);font-size:11px}
.m1-model-opacity input{min-width:0;width:100%;accent-color:var(--mv-teal)}
.m1-model-opacity output{text-align:right;font-variant-numeric:tabular-nums}
.m1-model-selection{padding:11px 13px;background:#f2f8f9;border-bottom:1px solid var(--mv-line)}
.m1-model-selection-heading{display:flex;align-items:center;justify-content:space-between;gap:7px}
.m1-model-selection-heading strong{font-size:12px;font-weight:700;line-height:1.5;overflow-wrap:anywhere}
.m1-model-selection-heading button{flex:0 0 auto;min-height:25px;min-width:25px;font-size:16px;padding:0 5px;background:transparent}
.m1-model-selection p{margin:3px 0 0;font-size:10px;line-height:1.5;color:var(--mv-muted)}
.m1-model-selection-actions{display:flex;gap:6px;margin:9px 0}
.m1-model-selection-actions button{flex:1;font-size:11px}
.m1-model-anatomy{border-bottom:1px solid var(--mv-line);background:#fff}
.m1-model-anatomy>summary{padding:12px 13px;font-size:12px;font-weight:750;cursor:pointer;list-style-position:inside;background:#f8fbfb}
.m1-model-anatomy>summary:hover{background:#edf7f8}
.m1-model-anatomy>summary>span{display:inline-block;margin-left:6px;font-size:10px;font-weight:500;color:var(--mv-muted)}
.m1-model-browser-body{padding:0 10px 10px}
.m1-model-search{display:block;margin:8px 2px 7px}
.m1-model-search>span{display:block;color:var(--mv-muted);font-size:10px;margin-bottom:4px}
.m1-model-search input{appearance:none;background:#fff;border:1px solid #bbced4;border-radius:7px;color:var(--mv-ink);font-size:12px;width:100%;min-height:38px;padding:7px 9px}
.m1-model-browser-actions{display:flex;align-items:center;flex-wrap:wrap;gap:5px;padding:0 2px 9px}
.m1-model-browser-actions button{font-size:10px;min-height:29px;padding:4px 7px}
.m1-model-browser-actions>span{flex-basis:100%;color:var(--mv-muted);font-size:10px;line-height:1.5;margin-top:2px}
.m1-model-group-list{max-height:340px;overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable;border-top:1px solid var(--mv-line)}
.m1-model-group{padding:0;border-bottom:1px solid var(--mv-line)}
.m1-model-group-heading{display:flex;align-items:center;gap:4px;padding:4px 2px}
.m1-model-group-heading>input,.m1-model-structure>input{appearance:auto;accent-color:var(--mv-teal);width:17px;height:17px;flex:0 0 17px;margin:0 3px;cursor:pointer}
.m1-model-viewer .m1-model-group-toggle{border:0;background:transparent;display:flex;align-items:center;gap:5px;flex:1;min-width:0;min-height:34px;padding:5px 2px;text-align:left;font-size:11px;font-weight:650}
.m1-model-group-toggle small{margin-left:auto;font-size:9px;font-weight:500;color:var(--mv-muted);white-space:nowrap}
.m1-model-chevron{display:inline-block;font-size:18px;width:9px;flex:0 0 9px;transform:rotate(0deg)}
.m1-model-group-toggle[aria-expanded=true] .m1-model-chevron{transform:rotate(90deg)}
.m1-model-viewer .m1-model-only{min-height:26px;padding:3px 5px;font-size:9px;border-color:transparent;background:#eef5f6;color:#356370}
.m1-model-structures{padding:0 0 6px 14px}
.m1-model-structure{display:flex;align-items:center;gap:3px;min-height:33px}
.m1-model-structure button{flex:1;min-width:0;text-align:left;border:0;border-radius:5px;background:transparent;padding:5px 7px;font-size:11px;line-height:1.45;font-weight:500}
.m1-model-no-results{padding:7px 3px;margin:0;color:var(--mv-muted);font-size:11px}
.m1-model-foot{padding:11px 14px 13px}
.m1-model-status{min-height:2.8em;margin:0 0 7px;font-size:11px;color:var(--mv-muted);line-height:1.45}
.m1-model-limits{font-size:10px;line-height:1.5;color:var(--mv-muted);margin:8px 0 0}
.m1-model-help{font-size:10px;color:var(--mv-muted)}
.m1-model-help summary{cursor:pointer;font-weight:650;list-style-position:inside;min-height:22px}
.m1-model-help p{margin:7px 0;line-height:1.6}
.m1-model-help code{font-size:9px;overflow-wrap:anywhere;color:#426270;background:transparent}
.m1-model-unavailable{padding:22px;text-align:left;background:#f4f8f9;border:1px solid var(--mv-line);border-radius:12px}
.m1-model-unavailable p{margin:0;color:var(--mv-muted);font-size:13px}
.m1-model-viewer [hidden]{display:none!important}
.m1-model-viewer:fullscreen,.m1-model-viewer.is-expanded{position:fixed;inset:0;width:100%;height:100%;z-index:2147482000;overflow:auto;overscroll-behavior:contain;background:#fff;padding:18px max(14px,calc((100vw - 1200px)/2));color:var(--mv-ink)}
.m1-model-viewer:fullscreen .m1-model-views,.m1-model-viewer.is-expanded .m1-model-views{padding:0 0 10px}
.m1-model-viewer:fullscreen .m1-model-canvas-wrap,.m1-model-viewer.is-expanded .m1-model-canvas-wrap{height:60vh;min-height:320px;max-height:750px;border-radius:10px}
.m1-model-viewer:fullscreen .m1-model-controls,.m1-model-viewer.is-expanded .m1-model-controls{display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;padding:12px 0}
.m1-model-viewer:fullscreen .m1-model-tools,.m1-model-viewer.is-expanded .m1-model-tools{grid-column:1;grid-row:1}
.m1-model-viewer:fullscreen .m1-model-gesture,.m1-model-viewer.is-expanded .m1-model-gesture{grid-column:1;grid-row:2}
.m1-model-viewer:fullscreen .m1-model-camera,.m1-model-viewer.is-expanded .m1-model-camera{grid-column:1;grid-row:3}
.m1-model-viewer:fullscreen .m1-model-modes,.m1-model-viewer.is-expanded .m1-model-modes{grid-column:2;grid-row:1}
.m1-model-viewer:fullscreen .m1-model-controls>.m1-model-opacity,.m1-model-viewer.is-expanded .m1-model-controls>.m1-model-opacity{grid-column:2;grid-row:3}
.m1-model-viewer:fullscreen .m1-model-group-list,.m1-model-viewer.is-expanded .m1-model-group-list{max-height:420px}
@media(max-width:600px){.m1-model-canvas-wrap{height:320px;min-height:280px}.m1-model-camera button,.m1-model-tools button{min-height:40px}.m1-model-views button{min-height:37px}.m1-model-group-heading{padding:5px 2px}.m1-model-structure{min-height:38px}.m1-model-viewer:fullscreen,.m1-model-viewer.is-expanded{padding:12px}.m1-model-viewer:fullscreen .m1-model-controls,.m1-model-viewer.is-expanded .m1-model-controls{display:flex;flex-direction:column;gap:10px}.m1-model-viewer:fullscreen .m1-model-canvas-wrap,.m1-model-viewer.is-expanded .m1-model-canvas-wrap{height:52vh;min-height:280px}.m1-model-viewer:fullscreen .m1-model-gesture,.m1-model-viewer.is-expanded .m1-model-gesture{order:0}}
@media(prefers-reduced-motion:reduce){.m1-model-viewer button{transition:none}}