/* Original, scoped fraction bars and coordinate geometry. Natural-height layouts. */
.explore-c-game{min-width:0}.explore-c-game .eyebrow>.explore-c-eyebrow{display:inline;width:auto;height:auto;margin:0;background:none;border-radius:0;vertical-align:baseline}
.explore-c-game .board-top{gap:12px;flex-wrap:wrap}.explore-c-game .board-caption{margin-left:auto;text-align:right;line-height:1.5;font-variant-numeric:tabular-nums}
.explore-c-game .status-row{align-items:center;gap:14px}.explore-c-game .status-row p{min-width:0;overflow-wrap:anywhere}.explore-c-game .history-controls{gap:16px;flex-wrap:wrap;justify-content:flex-end;max-width:100%}
.explore-c-game button:focus-visible{outline:3px solid #138777;outline-offset:4px}.explore-c-game .playground button:focus-visible{outline-color:#e7c77d}
.explore-c-caption{font-size:11px;line-height:1.7;text-align:center;color:#b2c9c3;margin:8px 0 16px;overflow-wrap:anywhere}
.explore-c-history{margin:18px 0;color:#698075;font-size:12px;line-height:1.8;overflow-wrap:anywhere}.explore-c-history summary{cursor:pointer;min-height:44px;padding:10px 0}.explore-c-history summary>span+span{margin-left:10px;color:#8a9b8c;font-size:11px}.explore-c-history ol{margin:8px 0;max-height:none;overflow:visible;padding-left:26px}.explore-c-history li{padding:5px 0;border-bottom:1px solid #dce4d8}.explore-c-history>p{font-size:11px}.explore-c-game .quiet-note{line-height:1.8}.explore-c-game .discovery .text-button{color:#28745f;font-weight:600;margin-top:8px;min-height:44px}
.fractions-comparison{margin:22px auto 18px;max-width:430px}.fractions-comparison>p:first-child{font-size:12px;color:#cedfd3;margin:0 0 4px}.fractions-comparison svg{width:100%;display:block;height:auto;overflow:visible}.fractions-base{fill:#b5e8d208;stroke:#66887a;stroke-width:1}.fractions-target{fill:#b5e8d267}.fractions-one{stroke:#d3e7d1;stroke-width:1;stroke-dasharray:3 3}.fractions-comparison svg text{fill:#d3e7d1;font-size:21px}.fractions-sum-piece{stroke:#102e35;stroke-width:1}.fractions-sum-piece.piece-0{fill:#e8d39b}.fractions-sum-piece.piece-1{fill:#b5e8d2}.fractions-sum-piece.piece-2{fill:#9fbdda}.fractions-total{font-size:18px;font-variant-numeric:tabular-nums;color:#e8d39b;margin:4px 0 0}.fractions-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin:18px 0 24px}.fractions-piece{display:flex;flex-direction:column;justify-content:center;gap:10px;min-width:0;min-height:66px;background:#b5e8d208;border:1px solid #628578;border-radius:10px;padding:10px;color:#e0eede}.fractions-piece-name{font-size:15px;font-variant-numeric:tabular-nums}.fractions-unit{display:grid;grid-template-columns:repeat(var(--denominator),minmax(0,1fr));height:12px;border:1px solid #83a99a;border-radius:2px;overflow:hidden;width:100%}.fractions-unit>span{border-right:1px solid #77958a50}.fractions-unit>span:last-child{border:0}.fractions-unit .is-unit{background:#b5e8d2}.fractions-piece[aria-pressed=true]{border-color:#e8d39b;background:#e8d39b18;color:#f5e7c6}.fractions-piece[aria-pressed=true] .fractions-unit .is-unit{background:#e8d39b}.fractions-piece:disabled{opacity:.62}.fractions-piece:disabled[aria-pressed=true]{opacity:1}
@media(max-width:640px){.explore-c-game .status-row{flex-direction:column;align-items:stretch;gap:0}.explore-c-game .history-controls{align-self:flex-end}.explore-c-game .explore-c-caption{font-size:12px}.explore-c-game .fractions-options{gap:8px}.explore-c-game .fractions-piece{padding:10px 7px}}
@media(max-width:360px){.explore-c-game .fractions-options{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* The camera changes all five views together; solids and mirror remain fixed. */
.mirror3d-round{font-size:16px;font-weight:500;color:#e8d39b;line-height:1.6;margin:20px 0 12px}
.mirror3d-camera{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:12px 0 18px}
.mirror3d-camera button{min-height:44px;min-width:44px;border:1px solid #789d90;background:#b5e8d20b;color:#e3eddf;border-radius:9px;padding:8px 12px;font-size:16px}
.mirror3d-camera button:last-child{font-size:12px}
.mirror3d-original{max-width:340px;width:100%;margin:0 auto 12px;border:1px solid #789d9066;border-radius:12px;background:#b5e8d204}
.mirror3d-original figcaption{text-align:center;padding:12px 10px 0;color:#d9eadc;font-size:13px}
.mirror3d-game svg{display:block;width:100%;height:auto;aspect-ratio:1;overflow:visible}
.mirror3d-choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0}
.mirror3d-choice{min-width:0;border:1px solid #789d90;border-radius:12px;background:#b5e8d204;color:#e3eddf;padding:12px 8px 4px}
.mirror3d-choice>span{display:block;font-size:13px;line-height:1.5;text-align:center}
.mirror3d-choice[aria-pressed=true]{border:2px solid #e8d39b;background:#e8d39b12;padding:11px 7px 3px}
.mirror3d-choice.is-matched>span:after{content:' ✓';color:#e8d39b}.mirror3d-choice:disabled{opacity:1}
.mirror3d-plane{fill:#d0ccab18;stroke:#d0ccab;stroke-width:1;stroke-dasharray:5 4}
.mirror3d-axis{stroke:#91afa3;stroke-width:1;stroke-dasharray:3 4;opacity:.7}
.mirror3d-axis-label{fill:#b9d2c5;font-size:15px}.mirror3d-origin{fill:#b9d2c5}
.mirror3d-face{fill:#b5e8d20d;stroke:none}.mirror3d-edge{fill:none;stroke:#dbecdc;stroke-width:1.7}
.mirror3d-point-label{fill:#f3e9c8;font-size:17px;paint-order:stroke;stroke:#102e35;stroke-width:3;stroke-linejoin:round}
.mirror3d-ghost{stroke:#b5e8d2;stroke-width:1.4;opacity:.7;fill:none;stroke-dasharray:4 3}
.mirror3d-correspondence{stroke:#e8d39b;stroke-width:1;stroke-dasharray:3 3;opacity:.8;fill:none}
.mirror3d-actions{display:flex;gap:12px;flex-wrap:wrap;margin:16px 0}.mirror3d-actions button{min-height:44px}
.mirror3d-game #reflection-status{font-size:13px;line-height:1.8;color:#d5e5d3;overflow-wrap:anywhere;min-height:3.6em}
.mirror3d-coordinates{margin:18px 0;color:#bed5c7;font-size:12px}.mirror3d-coordinates summary{cursor:pointer;min-height:44px;padding:12px 0;line-height:1.7}
#reflection-coordinate-table{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.mirror3d-coordinates table{width:100%;border-collapse:collapse;font-size:12px;font-variant-numeric:tabular-nums}
.mirror3d-coordinates caption{text-align:left;color:#e8d39b;line-height:1.8;padding-bottom:8px}
.mirror3d-coordinates th,.mirror3d-coordinates td{border-bottom:1px solid #789d9055;padding:7px 5px;text-align:center;font-weight:400}
@media(max-width:620px){.mirror3d-choices{grid-template-columns:minmax(0,1fr)}.mirror3d-choice{max-width:340px;width:100%;justify-self:center}.mirror3d-game #reflection-status{font-size:14px}.mirror3d-coordinates table{font-size:13px}}
@media(max-width:380px){#reflection-coordinate-table{grid-template-columns:minmax(0,1fr)}}
/* Topology uses explicit equivalence groups, not a perspective drawing. */
.topology-round{font-size:16px;font-weight:500;color:#e8d39b;line-height:1.6;margin:20px 0 0}
.topology-game #reflection-polygon{display:block;width:100%;max-width:380px;height:auto;margin:0 auto;overflow:visible}
.topology-edges{width:100%;border-collapse:collapse;margin:8px 0 20px;font-size:13px;color:#d1e3d5;line-height:1.8}
.topology-edges th,.topology-edges td{padding:8px;border-bottom:1px solid #789d9055;text-align:center;font-weight:400}
.topology-vertices{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 8px}
.topology-game .topology-vertex{min-width:44px;min-height:44px;background:#b5e8d20b;color:#e3eddf;border:1px solid #789d90;border-radius:10px;font-size:16px}
.topology-game .topology-vertex[aria-pressed=true]{background:#e8d39b;color:#193d37;border-color:#e8d39b}
.topology-actions{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0 18px}.topology-actions button{min-height:44px;border:1px solid #789d90;border-radius:10px;background:#b5e8d20b;color:#e3eddf;font-size:13px;padding:10px 14px}
.topology-selection,.topology-groups{font-size:13px;line-height:1.8;color:#e8d39b;overflow-wrap:anywhere}.topology-counting{font-size:13px;line-height:1.8;color:#d1e3d5;margin:18px 0}
.topology-handles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:20px 0 12px}
.topology-handles button{min-height:48px;min-width:0;padding:12px 8px;background:#b5e8d20b;color:#e3eddf;border:1px solid #789d90;border-radius:10px;font-size:13px;line-height:1.6;overflow-wrap:anywhere}
.topology-handles button[aria-pressed=true]{background:#e8d39b18;border-color:#e8d39b}.topology-game button:disabled{opacity:.55;cursor:default}
.topology-game #reflection-status{font-size:13px;line-height:1.8;color:#d1e3d5;overflow-wrap:anywhere;margin:18px 0;min-height:3.6em}.topology-game .primary-button{min-height:44px;margin:4px 8px 4px 0}
@media(max-width:400px){.topology-handles{grid-template-columns:minmax(0,1fr)}.topology-game #reflection-status,.topology-counting,.topology-groups,.topology-edges{font-size:14px}}