.planet-story{border:1px solid #c8d5e4;border-radius:12px;background:white;margin:0 0 36px;overflow:hidden;box-shadow:0 8px 28px #14345c0a}.planet-story [hidden]{display:none!important}.planet-mode{display:flex;border-bottom:1px solid var(--line);background:#edf2f8}.planet-mode button{flex:1;border:0;border-bottom:3px solid transparent;background:transparent;padding:17px 12px;color:#51677b;font-weight:650;font-size:.95rem}.planet-mode button[aria-pressed=true]{color:var(--navy);border-bottom-color:var(--teal);background:#fff}.planet-chapters{display:grid;grid-template-columns:repeat(4,1fr);padding:15px;gap:7px}.planet-chapters button{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:6px;padding:10px;text-align:left;font-size:.85rem;line-height:1.4;color:#4d6479;background:#f9fbfd}.planet-chapters button span{font-size:.78rem;color:var(--teal)}.planet-chapters button[aria-pressed=true]{border-color:var(--teal);color:#075f67;background:#eef9f8;font-weight:650}.planet-stage{margin:0;background:#102e50;color:#effaff;overflow:hidden}.planet-svg{width:100%;height:auto;display:block;font-family:inherit}.planet-stage figcaption{padding:0 24px 23px;min-height:100px}.planet-stage h3{font-size:1.28rem;line-height:1.4;margin:0 0 5px;color:#fff}.planet-stage p{font-size:1rem;line-height:1.65;color:#c6dceb;margin:0;max-width:820px}.planet-area-row{display:flex;gap:20px;justify-content:center;align-items:center;padding:18px 24px 12px;flex-wrap:wrap;background:#f2f8fa;border-bottom:1px solid #d9e9ed}.planet-area-row>div{text-align:center;flex:1;min-width:110px}.planet-area-row span{display:block;font-size:.85rem;color:#51677b}.planet-area-row strong{font-size:1.12rem}.area-units{display:flex;gap:5px;justify-content:center;margin:9px 0}.area-units i{display:block;border-radius:50%;width:22px;height:22px;background:#39a4ae38;border:2px solid var(--teal)}.planet-area-row>div:first-child i{background:#f3b64444;border-color:#b87909}.planet-area-row p{flex-basis:100%;font-size:.82rem;text-align:center;color:#587383;margin:0}.planet-result{padding:20px 24px;border-bottom:1px solid var(--line);min-height:100px}.planet-key-result{display:flex;align-items:center;justify-content:space-between;gap:15px}.planet-key-result>span{font-size:.95rem;color:#466077}.planet-key-result strong{font-size:1.5rem;line-height:1.4;color:var(--navy)}.planet-formula{display:flex;gap:16px;align-items:center;justify-content:center;font-size:1.3rem;color:var(--navy);flex-wrap:wrap}.planet-formula>span:first-child{font-size:.9rem}.planet-fraction{display:grid;text-align:center;gap:5px}.planet-fraction>span:first-child{border-bottom:2px solid #819ab1;padding-bottom:5px}.planet-fraction s{text-decoration-color:var(--teal);text-decoration-thickness:2px}.planet-bars{display:grid;grid-template-columns:1fr 1fr;gap:25px}.planet-bars span{display:block;font-size:.88rem;line-height:1.5;color:#466077}.planet-bars strong{display:block;font-size:1.8rem;color:var(--navy);margin:6px 0 9px;font-variant-numeric:tabular-nums}.planet-bars small{font-size:.85rem;font-weight:400}.planet-meter{height:9px;background:#e9eef4;border-radius:10px;overflow:hidden}.planet-meter i{display:block;height:100%;background:#d39b26;border-radius:10px}.planet-meter.mean i{background:var(--teal)}.planet-result>p{font-size:.88rem;line-height:1.65;color:#4d677b;margin:15px 0 0}.planet-player{padding:20px 24px}.planet-play-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:14px}.planet-play-row .primary{margin:0}.planet-play-row label{display:flex;align-items:center;gap:5px;font-size:.85rem;margin-left:auto}.planet-play-row select{padding:7px;border:1px solid #c5d2df;border-radius:5px;background:#fff;color:var(--navy)}.planet-player audio{display:block;width:100%;height:42px}.planet-player-note{font-size:.8rem;color:var(--muted);line-height:1.5;margin:10px 0 16px}.planet-transcript,.planet-steps{margin-top:16px;font-size:.94rem;line-height:1.8}.planet-story summary{cursor:pointer;font-weight:600;color:var(--navy)}.planet-transcript p{margin:10px 0;line-height:1.8}.planet-cue-buttons{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}.planet-cue-buttons button,.planet-explore-top button{padding:9px 12px;border:1px solid #c5d2df;border-radius:6px;background:#fff;color:var(--navy);font-size:.85rem;line-height:1.4}.planet-cue-buttons button[aria-pressed=true],.planet-explore-top button[aria-pressed=true]{background:#eaf6f5;border-color:var(--teal);color:#075e66}.planet-audio-error{padding:12px;border-left:3px solid #d39b26;background:#fff6e7;font-size:.9rem;line-height:1.6}.planet-reduced{padding:15px 24px;display:block;font-size:.85rem;border-top:1px solid var(--line);background:#f9fbfd;line-height:1.6;color:#29455d}.planet-reduced input{accent-color:var(--teal);margin-right:8px}.planet-reduced span{display:block;color:var(--muted);font-size:.8rem;margin-left:25px}.planet-explore-top{padding:18px 24px}.planet-explore-top p{margin:0 0 12px;font-size:1rem;color:#466077;line-height:1.5}.planet-explore-top>div{display:flex;gap:8px}.planet-controls{padding:22px 24px}.planet-controls>label,.planet-angle-control>label{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;font-size:.95rem}.planet-controls label strong{color:var(--navy);font-variant-numeric:tabular-nums;font-size:1rem}.planet-controls input[type=range]{display:block;width:100%;accent-color:var(--teal);margin:15px 0 22px;height:22px}.planet-angle-control p,.planet-marker-note{font-size:.9rem;line-height:1.6;color:#4d677b}.planet-controls .quiet{margin:0 8px 6px 0}.planet-story button:focus-visible{outline-offset:-4px}.planet-story input[type=range]:focus-visible{outline-offset:2px}
@media(max-width:1050px){.planet-chapters{grid-template-columns:1fr 1fr}.planet-key-result{flex-wrap:wrap}.planet-stage figcaption{min-height:115px}}
@media(max-width:720px){.planet-chapters{padding:10px}.planet-chapters button{font-size:.83rem;padding:9px}.planet-mode button{font-size:.87rem;padding:14px 8px}.planet-stage figcaption{padding:8px 18px 20px}.planet-stage h3{font-size:1.16rem}.planet-stage p{font-size:.95rem}.planet-direction{display:none}.planet-result,.planet-player,.planet-controls,.planet-explore-top{padding:18px}.planet-bars{gap:14px}.planet-bars strong{font-size:1.5rem}.planet-bars small{display:block;margin-top:2px}.planet-key-result strong{font-size:1.3rem}.planet-play-row label{margin:0}.planet-play-row button{font-size:.85rem}.planet-reduced{padding:14px 18px}.planet-formula{gap:12px;font-size:1.2rem}.planet-area-row{gap:12px;padding:16px}.planet-svg{min-height:175px}}
.planet-playback{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:0 15px 16px}.planet-playback .planet-play-row{margin:0;flex:1 1 auto}.planet-playback audio{display:block;flex:1 1 250px;width:100%;min-width:0;height:40px}.planet-playback .planet-play-row label{margin-left:auto}@media(max-width:720px){.planet-playback{padding:0 10px 12px;gap:10px}.planet-playback .primary,.planet-playback .quiet{padding:9px 10px}.planet-playback .planet-play-row{gap:7px}}
/* Controls stay beside the visual task in the reading order, above the scene. */
.planet-control-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.planet-control-grid label{display:flex;justify-content:space-between;align-items:center;gap:9px;font-size:.92rem;line-height:1.5}.planet-controls{padding:5px 20px 18px}.planet-controls input[type=range]{margin:10px 0;height:24px}.planet-presets{display:flex;gap:7px;flex-wrap:wrap}.planet-presets button{border:1px solid #c8d5e4;border-radius:5px;padding:7px 9px;color:var(--navy);background:#f4f8fb;font-size:.8rem}.planet-brightness-note{font-size:.8rem;color:var(--muted)}.planet-explore-top{padding:17px 20px 12px}.planet-challenge{font-size:.95rem!important;line-height:1.6!important;margin:13px 0 0!important;color:#36556e!important;max-width:780px}.planet-explore-top>div{display:grid;grid-template-columns:1fr 1fr}.planet-explore-top button{font-weight:650;padding:12px}.planet-result{font-size:.95rem;line-height:1.7;min-height:0;background:#eff8f7;color:#234e59}.planet-stage figcaption{min-height:0;padding:5px 24px 22px}.planet-stage h3{font-size:1.2rem}.planet-stage p{font-size:.94rem}.planet-svg{min-height:0}.planet-explore-footer{padding:0 22px 18px}.planet-explore-footer p{font-size:.8rem;color:var(--muted);line-height:1.6}.planet-explore-footer button{margin:0 8px 4px 0}.planet-cue-buttons{max-height:260px;overflow:auto;padding:4px}.planet-cue-buttons button{font-size:.85rem}.planet-watch .planet-player-note{margin-top:0}.planet-story[data-view=divide] .planet-stage{background:#0c2746}.planet-story[data-view=local] .planet-stage{background:#102e50}
@media(max-width:720px){.planet-control-grid{grid-template-columns:1fr;gap:16px}.planet-controls{padding:0 14px 16px}.planet-explore-top{padding:14px}.planet-explore-top button{font-size:.85rem;padding:10px 5px}.planet-stage figcaption{padding:10px 16px 20px}.planet-stage h3{font-size:1.08rem}.planet-stage p{font-size:.9rem}.planet-explore-footer{padding:0 16px 15px}.planet-presets button{font-size:.8rem}.planet-svg{min-height:0}}