.optics3d-lab {
  --lab-line: #cbd0d4;
  --lab-muted: #535b62;
  --lab-stage: #20262e;
  min-height: 100vh;
  color: #101216;
  background: #f6f7f8;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", system-ui, sans-serif;
  font-size: .875rem;
  line-height: 1.7;
}
.optics3d-embedded { min-height: 0; margin: 0 0 1.5rem; background: #f6f7f8; }
.optics3d-embedded .optics3d-main { max-width: none; padding: 0; }
.optics3d-embedded .optics3d-model,
.optics3d-embedded .optics3d-notes { margin-bottom: 0; }
.optics3d-embedded .optics3d-notes { padding-right: 1rem; padding-left: 1rem; }
.optics3d-lab *, .optics3d-lab *::before, .optics3d-lab *::after { box-sizing: border-box; }
.optics3d-lab h1, .optics3d-lab h2, .optics3d-lab h3, .optics3d-lab p, .optics3d-lab figure { margin: 0; }
.optics3d-lab button, .optics3d-lab input { font: inherit; }
.optics3d-lab button, .optics3d-lab a, .optics3d-lab summary { -webkit-tap-highlight-color: transparent; }
.optics3d-lab button { min-height: 44px; border: 0; border-radius: 0; background: none; color: inherit; cursor: pointer; }
.optics3d-lab button:disabled { color: #535b62; cursor: default; }
.optics3d-lab a { color: inherit; text-underline-offset: .24em; }
.optics3d-lab :focus-visible { outline: 2px solid #005a8c; outline-offset: 4px; }
.optics3d-mono, .optics3d-eyebrow, .optics3d-local, .optics3d-footer, .optics3d-stage-top, .optics3d-control output, .optics3d-scale, .optics3d-readouts dd { font-family: var(--mono, "SFMono-Regular", "Courier New", monospace); }
.optics3d-lab .optics3d-eyebrow { color: var(--lab-muted); font-size: .65rem; letter-spacing: .15em; line-height: 1.5; }
.optics3d-header { display: flex; min-height: 86px; justify-content: space-between; align-items: center; gap: 1rem; padding: .85rem clamp(1rem, 3.1vw, 3.5rem); border-bottom: 1px solid var(--lab-line); }
.optics3d-brand { display: flex; min-height: 44px; flex-direction: column; justify-content: center; text-decoration: none; }
.optics3d-brand > span:first-child { font: 1.3rem/1.5 var(--serif, "Yu Mincho", serif); letter-spacing: .15em; }
.optics3d-brand > span:last-child { font: .53rem/1.6 var(--mono, monospace); letter-spacing: .1em; }
.optics3d-header-actions { display: flex; align-items: center; gap: 1.8rem; }
.optics3d-local { display: grid; color: var(--lab-muted); font-size: .61rem; letter-spacing: .05em; text-align: right; }
.optics3d-local span { font: .68rem/1.8 "Hiragino Kaku Gothic ProN", sans-serif; letter-spacing: .03em; }
.optics3d-font-size { position: relative; }
.optics3d-font-size summary { display: flex; min-height: 44px; align-items: center; gap: 1.2rem; padding: 0 .8rem; border: 1px solid var(--lab-line); cursor: pointer; font-size: .75rem; list-style: none; }
.optics3d-font-size summary::-webkit-details-marker { display: none; }
.optics3d-font-size > div { position: absolute; z-index: 5; top: calc(100% + .4rem); right: 0; display: grid; min-width: 8rem; padding: .4rem; border: 1px solid var(--lab-line); background: #f6f7f8; }
.optics3d-font-size button[aria-pressed="true"] { background: #e9ecee; font-weight: 700; }
.optics3d-main { max-width: 1800px; margin: 0 auto; padding: 2.1rem clamp(1rem, 3.1vw, 3.5rem) 0; }
.optics3d-intro { display: flex; justify-content: space-between; align-items: flex-end; gap: 1.5rem; margin-bottom: 1.8rem; }
.optics3d-intro h1 { margin-top: .6rem; font: 400 clamp(2.15rem, 3.7vw, 4.1rem)/1.35 var(--serif, "Yu Mincho", serif); letter-spacing: .045em; }
.optics3d-intro h1 span { display: inline-block; white-space: nowrap; }
.optics3d-intro-right { display: flex; align-items: flex-end; gap: clamp(1rem, 2.8vw, 3rem); }
.optics3d-intro-right > p { color: var(--lab-muted); font-size: .78rem; line-height: 1.9; }
.optics3d-mode { display: flex; flex: 0 0 auto; padding: 4px; border: 1px solid var(--lab-line); }
.optics3d-mode button { display: flex; align-items: center; justify-content: center; gap: .65rem; padding: .45rem 1.05rem; font-size: .88rem; white-space: nowrap; }
.optics3d-mode button span { color: var(--lab-muted); font-family: var(--mono, monospace); font-size: .64rem; }
.optics3d-mode button[aria-pressed="true"] { background: #101216; color: #f6f7f8; }
.optics3d-mode button[aria-pressed="true"] span { color: #cdd3d7; }
.optics3d-workspace { display: grid; grid-template-columns: minmax(0, 1fr) 19rem; border: 1px solid var(--lab-line); }
.optics3d-model { min-width: 0; }
.optics3d-model-heading { display: flex; min-height: 67px; justify-content: space-between; align-items: center; gap: .8rem; padding: .85rem 1.4rem; border-bottom: 1px solid var(--lab-line); }
.optics3d-model-heading h2 { font: 400 1.16rem/1.6 var(--serif, "Yu Mincho", serif); }
.optics3d-model-heading > span { flex-shrink: 0; color: var(--lab-muted); font-size: .61rem; letter-spacing: .06em; }
.optics3d-toolbar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: .1rem 1rem; padding: .2rem 1rem; border-bottom: 1px solid var(--lab-line); }
.optics3d-view-controls, .optics3d-display-controls { display: flex; align-items: center; }
.optics3d-view-controls { gap: .1rem; }
.optics3d-view-controls button { position: relative; min-width: 3.4rem; padding: .35rem .65rem; font-size: .75rem; }
.optics3d-view-controls button[aria-pressed="true"]::after { position: absolute; right: .65rem; bottom: .3rem; left: .65rem; height: 2px; background: #101216; content: ""; }
.optics3d-display-controls { gap: 1rem; }
.optics3d-display-controls label { display: inline-flex; min-height: 44px; align-items: center; gap: .4rem; font-size: .72rem; cursor: pointer; }
.optics3d-display-controls input { width: 16px; height: 16px; margin: 0; accent-color: #101216; }
.optics3d-lab .optics3d-play { display: inline-flex; align-items: center; gap: .4rem; padding: .3rem .6rem; font-size: .72rem; }
.optics3d-play span { font: .9rem/1 var(--mono, monospace); }
.optics3d-stage { position: relative; height: clamp(480px, 39vw, 610px); overflow: hidden; background: var(--lab-stage); }
.optics3d-viewport { position: absolute; inset: 0; }
.optics3d-viewport canvas { display: block; max-width: 100%; touch-action: none; }
.optics3d-stage-top { position: absolute; top: 1.2rem; right: 1.4rem; left: 1.4rem; display: flex; justify-content: space-between; gap: .5rem; color: #c3cdd5; font-size: .56rem; letter-spacing: .09em; pointer-events: none; }
.optics3d-stage-top span { padding: .18rem .3rem; background: #20262e; }
.optics3d-stage-top span:nth-child(2) { text-align: center; }
.optics3d-stage-bottom { position: absolute; right: 1rem; bottom: .8rem; left: 1.4rem; display: flex; justify-content: space-between; align-items: center; gap: .7rem; pointer-events: none; }
.optics3d-stage-bottom p { padding: .25rem .5rem; background: #20262e; color: #d0d8df; font-size: .65rem; }
.optics3d-orbit-tools { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem 1rem; }
.optics3d-lab .optics3d-auto-rotate { pointer-events: auto; padding: .4rem .7rem; border: 1px solid #657383; background: #252e38; color: #eff4f8; font-size: .72rem; }
.optics3d-lab .optics3d-auto-rotate[aria-pressed="true"] { background: #dce7ef; color: #17212b; }
.optics3d-lab .optics3d-auto-rotate:not(:disabled):hover { background: #3c4a59; color: white; }
.optics3d-lab .optics3d-auto-rotate:disabled { color: #a6b2bd; }
.optics3d-stage :focus-visible { outline: 2px solid #a8daff; outline-offset: -4px; }
.optics3d-zoom { display: flex; border: 1px solid #657383; background: #252e38; color: #eff4f8; pointer-events: auto; }
.optics3d-zoom button { width: 44px; font-size: 1.2rem; }
.optics3d-zoom button + button { border-left: 1px solid #657383; }
.optics3d-lab .optics3d-zoom button:hover { background: #3c4a59; color: white; }
.optics3d-scene-message { position: absolute; z-index: 2; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .6rem; padding: 2rem; background: #e9ecee; text-align: center; }
.optics3d-scene-message > span { color: var(--lab-muted); font-size: .67rem; letter-spacing: .12em; }
.optics3d-scene-message h3 { max-width: 30rem; font: 400 1.3rem/1.6 var(--serif, serif); }
.optics3d-scene-message p { max-width: 30rem; color: var(--lab-muted); font-size: .82rem; }
.optics3d-scene-message a { display: inline-flex; min-height: 44px; align-items: center; gap: 1rem; }
.optics3d-controls { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.3rem; padding: 1.3rem 1.4rem 1.1rem; border-top: 1px solid var(--lab-line); }
.optics3d-controls.is-pinhole { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
.optics3d-control { min-width: 0; }
.optics3d-control-heading { display: flex; flex-direction: column; align-items: flex-start; gap: .15rem; min-height: 3.6rem; }
.optics3d-control label { font-size: .95rem; line-height: 1.55; }
.optics3d-control output { color: #9b3700; font-size: 1.06rem; font-weight: 500; white-space: nowrap; }
.optics3d-control input[type="range"] { display: block; width: 100%; height: 34px; margin: .15rem 0 0; appearance: none; -webkit-appearance: none; background: transparent; cursor: pointer; }
.optics3d-control input[type="range"]::-webkit-slider-runnable-track { height: 10px; border-radius: 0; background: linear-gradient(to right, #535b62 0 var(--range-fill), #d8dde0 var(--range-fill) 100%); }
.optics3d-control input[type="range"]::-webkit-slider-thumb { width: 26px; height: 26px; margin-top: -8px; appearance: none; -webkit-appearance: none; border: 2px solid #f6f7f8; border-radius: 50%; background: #101216; box-shadow: 0 0 0 1px #101216; }
.optics3d-control input[type="range"]::-moz-range-track { height: 10px; border: 0; border-radius: 0; background: #d8dde0; }
.optics3d-control input[type="range"]::-moz-range-progress { height: 10px; background: #535b62; }
.optics3d-control input[type="range"]::-moz-range-thumb { width: 22px; height: 22px; border: 2px solid #f6f7f8; border-radius: 50%; background: #101216; box-shadow: 0 0 0 1px #101216; }
.optics3d-scale { display: flex; justify-content: space-between; gap: .5rem; color: var(--lab-muted); font-size: .62rem; }
.optics3d-under-controls { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: .4rem 1rem; padding: .3rem 1.4rem .7rem; }
.optics3d-legend { display: flex; flex-wrap: wrap; gap: .4rem 1rem; }
.optics3d-legend > span { display: inline-flex; align-items: center; gap: .5rem; color: var(--lab-muted); font-size: .68rem; }
.optics3d-legend i { position: relative; display: block; width: 24px; height: 0; border-top: 2px solid #9b3700; }
.optics3d-legend i::after { position: absolute; top: -4px; left: 9px; width: 6px; height: 6px; border: 1px solid #9b3700; border-radius: 50%; background: #9b3700; content: ""; }
.optics3d-lab[data-mode="pinhole"] .optics3d-legend i.is-upper { border-color: #322e2c; }
.optics3d-lab[data-mode="pinhole"] .optics3d-legend i.is-upper::after { border-color: #322e2c; background: #322e2c; }
.optics3d-legend i.is-lower { border-top: 2px dashed #005a8c; }
.optics3d-legend i.is-lower::after { border-color: #005a8c; border-radius: 0; background: #f6f7f8; }
.optics3d-subject-controls { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem 1rem; }
.optics3d-subject-controls > div { display: flex; border: 1px solid var(--lab-line); }
.optics3d-subject-controls > div button { min-width: 3.6rem; padding: .4rem .7rem; font-size: .75rem; }
.optics3d-subject-controls > div button[aria-pressed="true"] { background: #e0e4e7; font-weight: 700; }
.optics3d-lab .optics3d-focus { display: inline-flex; align-items: center; justify-content: space-between; gap: .9rem; padding: .35rem 0; text-decoration: underline; text-underline-offset: .28em; font-size: .74rem; }
.optics3d-fixed-distance { color: var(--lab-muted); font-size: .73rem; }
.optics3d-lab .optics3d-live-state { display: flex; min-height: 54px; align-items: center; gap: .75rem; padding: .75rem 1.4rem; border-top: 1px solid var(--lab-line); color: #333e46; font-size: .78rem; }
.optics3d-live-state > span { color: #9b3700; font: 1.2rem/1 var(--mono, monospace); }
.optics3d-projection { min-width: 0; padding: 1.35rem 1.2rem; border-left: 1px solid var(--lab-line); background: #eff1f3; }
.optics3d-projection-title h2 { margin: .4rem 0 1.05rem; font: 400 1.25rem/1.6 var(--serif, "Yu Mincho", serif); }
.optics3d-projection-figure canvas { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; border: 1px solid #c4ccd2; background: #dde3e7; }
.optics3d-projection-figure figcaption { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .3rem; margin-top: .6rem; color: var(--lab-muted); font-size: .62rem; line-height: 1.5; }
.optics3d-readouts { display: grid; gap: 0; margin: 1.3rem 0 0; }
.optics3d-readouts > div { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: .1rem .5rem; padding: .7rem 0; border-top: 1px solid var(--lab-line); }
.optics3d-readouts dt { color: var(--lab-muted); font-size: .75rem; }
.optics3d-readouts dd { margin: 0; font-size: 1rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.optics3d-readouts dd span { margin-left: .4rem; color: var(--lab-muted); font-size: .63rem; }
.optics3d-lab .optics3d-readout-note { margin-top: .9rem; color: var(--lab-muted); font-size: .65rem; line-height: 1.8; }
.optics3d-notes { display: grid; grid-template-columns: 9rem minmax(0, 1fr) auto; gap: 1.4rem; align-items: start; padding: 1.9rem 0 2.2rem; }
.optics3d-notes h2 { padding-top: .15rem; font: 400 1.08rem/1.6 var(--serif, "Yu Mincho", serif); }
.optics3d-notes > div { max-width: 66rem; }
.optics3d-notes p { color: var(--lab-muted); font-size: .72rem; line-height: 1.95; }
.optics3d-notes p + p { margin-top: .5rem; }
.optics3d-original-link { display: inline-flex; min-height: 44px; align-items: center; justify-content: space-between; gap: 1.7rem; border-bottom: 1px solid #101216; font-size: .76rem; text-decoration: none; white-space: nowrap; }
.optics3d-footer { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: .4rem 1.5rem; min-height: 70px; padding: .6rem clamp(1rem, 3.1vw, 3.5rem); border-top: 1px solid var(--lab-line); color: var(--lab-muted); font-size: .61rem; letter-spacing: .035em; }
.optics3d-footer a { display: inline-flex; min-height: 44px; align-items: center; }
.optics3d-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.optics3d-skip { position: absolute; z-index: 20; top: -8rem; left: 1rem; display: flex; min-height: 44px; align-items: center; padding: .65rem 1rem; background: #f6f7f8; }
.optics3d-skip:focus { top: 1rem; }
@media (hover: hover) {
  .optics3d-lab button:not(:disabled):hover { background-color: #dde2e6; }
  .optics3d-mode button[aria-pressed="true"]:hover { background-color: #343b42; }
  .optics3d-original-link:hover { border-bottom-width: 2px; }
}
@media (max-width: 1280px) {
  .optics3d-intro-right > p { display: none; }
  .optics3d-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem 1.7rem; }
  .optics3d-stage { height: 480px; }
  .optics3d-workspace { grid-template-columns: minmax(0, 1fr) 17.5rem; }
  .optics3d-notes { grid-template-columns: 7rem minmax(0, 1fr); }
  .optics3d-original-link { grid-column: 2; justify-self: start; }
}
@media (max-width: 1000px) {
  .optics3d-workspace { grid-template-columns: minmax(0, 1fr); }
  .optics3d-stage { height: 480px; }
  .optics3d-projection { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); column-gap: 1.7rem; border-top: 1px solid var(--lab-line); border-left: 0; }
  .optics3d-projection-title { grid-column: 1 / -1; }
  .optics3d-readouts { margin-top: 0; }
  .optics3d-readout-note { grid-column: 2; }
  .optics3d-controls { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; }
  .optics3d-control-heading { min-height: 4rem; }
}
@media (max-width: 760px) {
  .optics3d-header { min-height: 76px; }
  .optics3d-header-actions { gap: .8rem; }
  .optics3d-main { padding-top: 1.6rem; }
  .optics3d-intro { display: block; margin-bottom: 1.35rem; }
  .optics3d-intro h1 { font-size: clamp(2rem, 6.8vw, 3.2rem); }
  .optics3d-intro-right { display: block; margin-top: 1.3rem; }
  .optics3d-mode { width: max-content; }
  .optics3d-model-heading { min-height: 61px; padding: .8rem 1rem; }
  .optics3d-model-heading h2 { font-size: 1.05rem; }
  .optics3d-model-heading > span { font-size: .54rem; }
  .optics3d-toolbar { gap: 0 .5rem; padding: .2rem .5rem; }
  .optics3d-display-controls { gap: .5rem; }
  .optics3d-stage { height: 370px; }
  .optics3d-stage-top { top: 1rem; right: 1rem; left: 1rem; font-size: .5rem; }
  .optics3d-stage-bottom { right: .7rem; left: 1rem; bottom: .6rem; }
  .optics3d-stage-bottom p { font-size: .61rem; }
  .optics3d-orbit-tools { display: grid; gap: .15rem; }
  .optics3d-stage-bottom p span { display: none; }
  .optics3d-controls, .optics3d-controls.is-pinhole { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem 1.4rem; padding: 1.2rem 1rem; }
  .optics3d-control-heading { min-height: 4rem; }
  .optics3d-under-controls { padding: .1rem 1rem .8rem; gap: .5rem 1rem; }
  .optics3d-subject-controls { gap: .6rem; }
  .optics3d-lab .optics3d-live-state { padding: .85rem 1rem; font-size: .75rem; }
  .optics3d-notes { grid-template-columns: minmax(0, 1fr); gap: .8rem; padding: 1.5rem 0 1.8rem; }
  .optics3d-original-link { grid-column: 1; }
}
@media (max-width: 480px) {
  .optics3d-header { padding: .65rem 1rem; gap: .5rem; }
  .optics3d-brand { flex-shrink: 0; white-space: nowrap; }
  .optics3d-header-actions { gap: .4rem; }
  .optics3d-brand > span:first-child { font-size: 1.15rem; }
  .optics3d-local { font-size: .5rem; }
  .optics3d-local span { font-size: .59rem; }
  .optics3d-font-size summary { gap: .5rem; padding: 0 .5rem; font-size: .68rem; white-space: nowrap; }
  .optics3d-main { padding-right: .75rem; padding-left: .75rem; }
  .optics3d-intro { padding: 0 .25rem; }
  .optics3d-model-heading { align-items: flex-start; flex-direction: column; gap: .2rem; }
  .optics3d-toolbar { justify-content: center; padding: .2rem .4rem; }
  .optics3d-view-controls { flex-wrap: wrap; width: 100%; justify-content: center; border-bottom: 1px solid var(--lab-line); }
  .optics3d-display-controls { flex-wrap: wrap; justify-content: center; width: 100%; padding: 0 .25rem; }
  .optics3d-stage { height: 350px; }
  .optics3d-view-controls button { min-width: 44px; padding-right: .5rem; padding-left: .5rem; }
  .optics3d-stage-top { display: none; }
  .optics3d-controls, .optics3d-controls.is-pinhole { gap: 1.15rem 1rem; }
  .optics3d-control label { font-size: .95rem; overflow-wrap: anywhere; }
  .optics3d-control output { font-size: 1.06rem; }
  .optics3d-control-heading { gap: .25rem; min-height: 5rem; }
  .optics3d-under-controls { flex-direction: column; align-items: stretch; }
  .optics3d-subject-controls { justify-content: space-between; }
  .optics3d-subject-controls > div button { min-width: 2.8rem; padding: .4rem .5rem; }
  .optics3d-lab .optics3d-focus { font-size: .69rem; gap: .4rem; }
  .optics3d-projection { grid-template-columns: minmax(0, 1fr); padding: 1.25rem 1rem; }
  .optics3d-projection-title, .optics3d-readout-note { grid-column: 1; }
  .optics3d-readouts { margin-top: 1rem; }
  .optics3d-readouts > div { padding: .6rem 0; }
  .optics3d-readouts dt, .optics3d-readout-note { font-size: .73rem; }
  .optics3d-footer { display: grid; justify-content: start; gap: .25rem; padding: .8rem 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  .optics3d-lab *, .optics3d-lab *::before, .optics3d-lab *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}
@media print {
  .optics3d-lab { background: white; font-size: 10pt; }
  .optics3d-header-actions, .optics3d-mode, .optics3d-toolbar, .optics3d-stage-bottom, .optics3d-controls, .optics3d-subject-controls, .optics3d-original-link, .optics3d-footer { display: none; }
  .optics3d-main { max-width: none; padding: 1rem 0; }
  .optics3d-intro h1 { font-size: 26pt; }
  .optics3d-workspace { display: block; break-inside: avoid; }
  .optics3d-stage { height: 300px; }
  .optics3d-projection { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--lab-line); border-left: 0; }
  .optics3d-projection-title { grid-column: 1 / -1; }
  .optics3d-readouts { margin: 0; }
  .optics3d-readout-note { grid-column: 2; }
  .optics3d-notes { display: block; }
}