:root{--bp-mobile: 720px;--safe-pad-mobile: 12px;--safe-pad-desktop: 48px}:root{color-scheme:light;--bg: #f5f1e8;--bg-2: #ede8db;--ink: #1a1612;--ink-soft: #6b5b48;--ink-mute: #a89880;--line: rgba(26, 22, 18, .1);--accent: #c8421a;--red: #d93a3a;--panel-bg: rgba(255, 255, 255, .85);--panel-bg-strong: rgba(255, 255, 255, .92);--input-bg: #ffffff;--thumb-border: #ffffff;--active-bg: rgba(217, 58, 58, .1)}[data-theme=dark]{color-scheme:dark;--bg: #0c0b09;--bg-2: #15130f;--ink: #f5efe6;--ink-soft: #a89878;--ink-mute: #6a5e4a;--line: rgba(245, 239, 230, .1);--accent: #ff7a1a;--red: #ff6b6b;--panel-bg: rgba(20, 18, 15, .78);--panel-bg-strong: rgba(20, 18, 15, .92);--input-bg: #1d1a14;--thumb-border: #0c0b09;--active-bg: rgba(255, 107, 107, .14)}*{box-sizing:border-box}html,body{margin:0;padding:0;width:100%;height:100%;overflow:hidden;background:var(--bg);font-family:Space Grotesk,-apple-system,Helvetica,sans-serif;color:var(--ink);-webkit-font-smoothing:antialiased}.topbar{position:fixed;top:20px;left:20px;z-index:10;display:flex;flex-direction:column;gap:2px;pointer-events:none}.eyebrow{font-family:JetBrains Mono,monospace;font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-mute)}.title{font-size:18px;font-weight:600;letter-spacing:-.01em}.title-select{pointer-events:auto;appearance:none;-webkit-appearance:none;background-color:var(--input-bg);border:1px solid var(--line);border-radius:8px;color:var(--ink);font-family:inherit;font-size:18px;font-weight:600;letter-spacing:-.01em;padding:4px 30px 4px 12px;cursor:pointer;outline:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 16 16' fill='none' stroke='%238a8680' stroke-width='1.3' stroke-linecap='round'%3E%3Cpath d='M4 6.5l4 4 4-4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;max-width:min(70vw,360px);text-overflow:ellipsis;overflow:hidden}.title-select:hover{border-color:var(--ink-soft)}.title-select option{color:var(--ink);background-color:var(--input-bg);font-size:14px;font-weight:500;letter-spacing:0}.lang-picker{position:fixed;top:20px;right:108px;z-index:11}.lang-picker select{height:32px;border:1px solid var(--line);background-color:var(--input-bg);font-family:inherit;font-size:12px;color:var(--ink);cursor:pointer;outline:none;padding:0 26px 0 28px;border-radius:8px;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 16 16' fill='none' stroke='%238a8680' stroke-width='1.3'%3E%3Ccircle cx='8' cy='8' r='6.5'/%3E%3Cpath d='M1.5 8h13M8 1.5c2 2 2 11 0 13M8 1.5c-2 2-2 11 0 13'/%3E%3C/svg%3E"),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5l3 3 3-3' stroke='%238a8680' stroke-width='1.3' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat,no-repeat;background-position:left 10px center,right 10px center;max-width:170px}.panel{position:fixed;background:var(--panel-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--line);border-radius:14px;padding:16px;z-index:10}.panel-title{font-family:JetBrains Mono,monospace;font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:12px}.hint{position:fixed;bottom:20px;right:20px;font-family:JetBrains Mono,monospace;font-size:10px;color:var(--ink-mute);letter-spacing:.08em;z-index:10;text-align:right;line-height:1.6}.info-badge{position:fixed;top:70px;left:50%;transform:translate(-50%);display:none;z-index:10;padding:8px 14px;background:var(--panel-bg-strong);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:20px;font-size:12px;color:var(--ink);gap:10px;align-items:center}.info-badge.show{display:inline-flex}.info-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--red)}.info-badge .len{font-family:JetBrains Mono,monospace;color:var(--ink-mute)}html[dir=rtl] .topbar{left:auto;right:20px;text-align:right}html[dir=rtl] .lang-picker{right:auto;left:20px}html[dir=rtl] .hint{right:auto;left:20px;text-align:left}html[dir=rtl] .lang-picker select{padding:4px 4px 4px 22px;background-position:left 4px center}[data-rotate-nudge]{position:fixed;inset:0;z-index:1000;display:none;align-items:center;justify-content:center;background:var(--bg);color:var(--ink)}[data-rotate-nudge][data-visible=true]{display:flex}.rotate-nudge-card{display:flex;flex-direction:column;align-items:center;gap:18px;padding:32px;text-align:center}.rotate-nudge-text{font-family:JetBrains Mono,monospace;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft)}[data-mobile-drawer]{display:contents}@media(max-width:720px){[data-mobile-drawer]{display:block;position:fixed;top:0;bottom:0;width:min(86vw,320px);background:var(--panel-bg-strong);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);z-index:30;padding:56px 16px 16px;overflow-y:auto;transition:transform .22s ease}[data-mobile-drawer=left]{left:0;border-right:1px solid var(--line);transform:translate(-100%)}[data-mobile-drawer=right]{right:0;border-left:1px solid var(--line);transform:translate(100%)}[data-mobile-drawer][data-open=true]{transform:translate(0)}[data-mobile-drawer] .panel{position:static;inset:auto;width:100%;max-height:none;margin-bottom:12px;display:block}}[data-mobile-drawer-toggle]{position:fixed;top:50%;transform:translateY(-50%);width:32px;height:64px;z-index:31;background:var(--panel-bg-strong);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--line);color:var(--ink);font-size:18px;cursor:pointer;display:none}[data-mobile-drawer-toggle=left]{left:0;border-left:none;border-radius:0 8px 8px 0}[data-mobile-drawer-toggle=right]{right:0;border-right:none;border-radius:8px 0 0 8px}[data-mobile-drawer-scrim]{position:fixed;inset:0;background:#00000059;z-index:29;display:none}[data-mobile-drawer-scrim][data-active=true]{display:block}@media(max-width:720px){[data-mobile-drawer-toggle]{display:block}}@media(max-width:720px){.topbar{top:12px;left:44px;gap:0}.topbar .eyebrow{font-size:9px}.topbar .title,.topbar .title-select{font-size:15px}.lang-picker{top:12px;right:132px}.lang-picker select{width:32px;max-width:32px;padding:0;color:transparent;text-shadow:none;background-position:center center,-9999px center}.lang-picker select option{color:var(--ink);text-shadow:none}.hint{display:none}.action-bar{left:12px;right:12px;transform:none;bottom:calc(env(safe-area-inset-bottom,0px) + 12px);padding:10px 12px;flex-wrap:wrap;justify-content:center}.action-bar .btn{min-width:44px;min-height:44px;padding:10px 14px}.action-bar .dim-slider{width:100px}}@media(max-width:720px){body>.panel{display:none}}.panel-title-collapsible{cursor:pointer;-webkit-user-select:none;user-select:none;display:flex;align-items:center;gap:8px;outline:none}.panel-title-collapsible:after{content:"";margin-left:auto;width:8px;height:8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);transition:transform .15s ease;opacity:.6}.panel[data-collapsed=true] .panel-title-collapsible:after{transform:rotate(-45deg)}.panel-title-collapsible:focus-visible{box-shadow:0 0 0 2px var(--accent);border-radius:4px}.panel[data-collapsed=true]>*:not(.panel-title){display:none}.theme-toggle{position:fixed;top:20px;right:20px;z-index:11;width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background-color:var(--input-bg);color:var(--ink);border-radius:8px;cursor:pointer;padding:0;font:inherit}.theme-toggle:hover{border-color:var(--ink-soft)}@media(max-width:720px){.theme-toggle{top:12px;right:44px}}.help-toggle{position:fixed;top:20px;right:64px;z-index:11;width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background-color:var(--input-bg);color:var(--ink);border-radius:8px;cursor:pointer;padding:0;font:inherit}.help-toggle:hover{border-color:var(--ink-soft)}.help-panel{position:fixed;top:60px;right:20px;z-index:12;display:none;max-width:min(320px,calc(100vw - 40px));background:var(--panel-bg-strong);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-family:JetBrains Mono,monospace;font-size:11px;letter-spacing:.06em;color:var(--ink-soft);line-height:1.7}.help-panel[data-open=true]{display:block}.help-line{margin:0}.help-line+.help-line{margin-top:4px}@media(max-width:720px){.help-toggle{top:12px;right:88px}.help-panel{top:52px;right:12px;max-width:calc(100vw - 24px)}}.dim-row{display:grid;grid-template-columns:1fr auto;grid-template-rows:auto auto;column-gap:8px;row-gap:2px;margin-bottom:10px}.dim-row:last-child{margin-bottom:0}.dim-label{grid-column:1;grid-row:1;font-family:JetBrains Mono,monospace;font-size:11px;font-weight:500;color:var(--ink-soft);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.dim-value{grid-column:2;grid-row:1;font-family:JetBrains Mono,monospace;font-size:11px;font-weight:600;color:var(--ink);text-align:right;font-variant-numeric:tabular-nums}.dim-slider{grid-column:1 / -1;grid-row:2;-webkit-appearance:none;appearance:none;width:100%;height:3px;background:var(--line);border-radius:2px;outline:none;min-width:0}.dim-slider::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:var(--ink);cursor:pointer;border:2px solid var(--thumb-border)}.style-row{display:flex;align-items:center;gap:8px;margin-bottom:8px}.style-row:last-child{margin-bottom:0}.style-label{font-size:11px;color:var(--ink-soft);width:62px;flex-shrink:0}.color-input{width:22px;height:22px;padding:0;border:1px solid var(--line);border-radius:6px;background:none;cursor:pointer;flex-shrink:0}.color-input::-webkit-color-swatch-wrapper{padding:2px}.color-input::-webkit-color-swatch{border:none;border-radius:4px}.toggle-row{margin-top:4px;padding-top:10px;border-top:1px solid var(--line)}.toggle-lbl{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--ink-soft);cursor:pointer;-webkit-user-select:none;user-select:none}.toggle-lbl input{accent-color:var(--ink)}.fig-select{width:100%;padding:10px 30px 10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--input-bg);font-family:inherit;font-size:13px;color:var(--ink);cursor:pointer;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5l3 3 3-3' stroke='%23555' stroke-width='1.3' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center}#readout{display:flex;flex-direction:column;gap:.5rem;margin-top:12px;padding:.75rem;background:var(--panel-bg);border:1px solid var(--line);border-radius:4px;font-size:.875rem;font-variant-numeric:tabular-nums;color:var(--ink)}#readout:empty{display:none}#readout [data-role=readout-row]{display:flex;gap:.5rem;align-items:baseline}#readout [data-part=lhs],#readout [data-part=relation],#readout [data-part=rhs]{font-variant-numeric:tabular-nums}#readout [data-part=relation]{font-weight:500;color:var(--ink-soft)}#readout .geo-readout-row--invariant,#readout .geo-readout-row--invariant [data-part=relation]{color:var(--accent)}#readout .geo-readout-row--broken,#readout .geo-readout-row--broken [data-part=relation]{color:var(--red)}.geo-symmetry-flash{outline:3px solid var(--accent);border-radius:4px;transition:outline .1s ease-in}.geo-gridline{stroke:var(--ink);stroke-opacity:.08;stroke-width:1;fill:none}.geo-axis{stroke:var(--ink);stroke-width:1.5;fill:none}.geo-fill-rect{fill:var(--accent);fill-opacity:.12}.geo-fill-label{fill:var(--ink-soft);font-family:JetBrains Mono,monospace;font-size:12px;pointer-events:none}.geo-grid{pointer-events:none}.geo-grid--faint .geo-gridline{stroke-opacity:.04}.geo-grid--faint .geo-axis{stroke-opacity:.4}.geo-grid--faint .geo-fill-rect{fill-opacity:.06}.geo-ghost{stroke:var(--accent);stroke-opacity:.35;stroke-dasharray:6 4;fill:none}.geo-glow{stroke:var(--accent);stroke-opacity:1;stroke-dasharray:none;filter:drop-shadow(0 0 6px var(--accent));fill:none}.geo-given{stroke:var(--ink-soft);stroke-width:1.5;fill:none}.geo-given-pt{fill:var(--ink-soft);stroke:none}.geo-drawn{stroke:var(--ink);stroke-width:1.5;fill:none}.geo-drawn-pt{fill:var(--ink);stroke:none}.geo-snap-dot{fill:var(--accent);fill-opacity:.5;cursor:crosshair}.geo-snap-brightened{fill-opacity:1;r:5}.geo-compass-preview{stroke:var(--accent);stroke-opacity:.6;stroke-width:1;fill:none;stroke-dasharray:4 3}.geo-straightedge-preview{stroke:var(--accent);stroke-opacity:.6;stroke-width:1;stroke-dasharray:4 3}.geo-stage{width:100%;height:100%;display:block}.geo-line{stroke:var(--ink);stroke-width:1.75;fill:none}.geo-line-special{stroke:var(--accent);stroke-width:2;fill:none}.geo-ray{stroke:var(--ink);stroke-width:1.75;fill:none}.geo-ray-seg{stroke:var(--ink-soft);stroke-width:1.5;fill:none}.geo-tri-side{stroke:var(--ink);stroke-width:2;fill:none}.geo-tri-base{stroke:var(--accent);stroke-width:2;fill:none}.geo-tri-hyp{stroke:var(--accent);stroke-width:2.25;fill:none}.geo-intercept-seg{stroke:var(--ink-soft);stroke-width:1.5;fill:none}.geo-circle{stroke:var(--ink);stroke-width:1.75;fill:none}.geo-point-main{fill:var(--ink)}.geo-point-secondary{fill:var(--ink-soft)}.geo-point-draggable{fill:var(--accent);cursor:grab}.geo-point-off-stage{fill:var(--ink);fill-opacity:.25}.geo-centre-pt{fill:var(--ink-soft)}.geo-dilation-centre{fill:var(--accent);cursor:grab}.geo-intercept-pt{fill:var(--red)}.geo-image-pt{fill:var(--accent)}.geo-preimage-pt{fill:var(--ink-soft)}.geo-drag-point{fill:var(--accent);stroke:var(--bg);stroke-width:2;cursor:grab}.geo-drag-active{fill:color-mix(in srgb,var(--accent) 80%,var(--ink) 20%);stroke:var(--bg);stroke-width:2.5;cursor:grabbing}.geo-polygon-fill{fill:color-mix(in srgb,var(--accent) 18%,transparent);stroke:var(--accent);stroke-width:1.5}.geo-polygon-ghost{fill:color-mix(in srgb,var(--ink) 6%,transparent);stroke:var(--ink-soft);stroke-width:1.25;stroke-dasharray:5 4}.geo-image,.geo-image-poly{fill:color-mix(in srgb,var(--accent) 20%,transparent);stroke:var(--accent);stroke-width:1.5}.geo-preimage,.geo-preimage-poly{fill:color-mix(in srgb,var(--ink-soft) 15%,transparent);stroke:var(--ink-soft);stroke-width:1.25;stroke-dasharray:6 3}.geo-square-a{fill:color-mix(in srgb,var(--accent) 22%,transparent);stroke:var(--accent);stroke-width:1.5}.geo-square-b{fill:color-mix(in srgb,var(--red) 22%,transparent);stroke:var(--red);stroke-width:1.5}.geo-square-c{fill:color-mix(in srgb,var(--accent) 14%,color-mix(in srgb,var(--ink-soft) 28%,transparent));stroke:color-mix(in srgb,var(--accent) 60%,var(--ink-soft) 40%);stroke-width:1.5}.geo-shape-a{fill:color-mix(in srgb,var(--accent) 22%,transparent);stroke:var(--accent);stroke-width:1.5}.geo-shape-b{fill:color-mix(in srgb,var(--red) 22%,transparent);stroke:var(--red);stroke-width:1.5}.geo-shape-c{fill:color-mix(in srgb,var(--accent) 14%,color-mix(in srgb,var(--ink-soft) 28%,transparent));stroke:color-mix(in srgb,var(--accent) 60%,var(--ink-soft) 40%);stroke-width:1.5}.geo-piece-0{fill:color-mix(in srgb,var(--accent) 55%,transparent);stroke:var(--line);stroke-width:1}.geo-piece-1{fill:color-mix(in srgb,var(--red) 55%,transparent);stroke:var(--line);stroke-width:1}.geo-piece-2{fill:color-mix(in srgb,var(--accent) 35%,color-mix(in srgb,var(--red) 35%,transparent));stroke:var(--line);stroke-width:1}.geo-piece-3{fill:color-mix(in srgb,var(--ink-soft) 45%,transparent);stroke:var(--line);stroke-width:1}.geo-piece-4{fill:color-mix(in srgb,var(--accent) 70%,transparent);stroke:var(--line);stroke-width:1}.geo-piece-5{fill:color-mix(in srgb,var(--red) 35%,color-mix(in srgb,var(--ink-soft) 30%,transparent));stroke:var(--line);stroke-width:1}.geo-piece-6{fill:color-mix(in srgb,var(--accent) 25%,color-mix(in srgb,var(--ink-soft) 40%,transparent));stroke:var(--line);stroke-width:1}.geo-piece-7{fill:color-mix(in srgb,var(--red) 70%,transparent);stroke:var(--line);stroke-width:1}.geo-piece-8{fill:color-mix(in srgb,var(--accent) 45%,color-mix(in srgb,var(--red) 20%,transparent));stroke:var(--line);stroke-width:1}.geo-piece-9{fill:color-mix(in srgb,var(--ink-soft) 60%,color-mix(in srgb,var(--accent) 15%,transparent));stroke:var(--line);stroke-width:1}.geo-triple-highlight{stroke:var(--accent);stroke-width:3;filter:drop-shadow(0 0 4px var(--accent))}.geo-select{width:100%;background:var(--input-bg);color:var(--ink);border:1px solid var(--line);border-radius:4px;padding:4px 6px;font-size:.875rem;font-family:inherit}.geo-scrubber{width:100%;accent-color:var(--accent)}.geo-scrubber-row{display:flex;flex-direction:column;gap:4px}.geo-slider-value{font-size:.8rem;color:var(--ink-soft);font-variant-numeric:tabular-nums}.geo-shape-picker{display:flex;flex-direction:column;gap:4px}.geo-triples-strip{display:flex;flex-wrap:wrap;gap:4px;margin-top:4px}.geo-triple-item{background:var(--active-bg);color:var(--accent);border-radius:3px;padding:2px 6px;font-size:.8rem;font-variant-numeric:tabular-nums}body[data-shot] .topbar,body[data-shot] .params-panel,body[data-shot] #actionBar,body[data-shot] #infoBadge,body[data-shot] [data-mobile-drawer-trigger],body[data-shot] #langPicker{display:none!important}#stage{position:fixed;inset:88px 24px 72px 320px;color:var(--ink);font-family:Space Grotesk,sans-serif;overflow:auto}.params-panel{top:88px;left:20px;width:280px;max-height:calc(100vh - 108px);overflow-y:auto}.params-panel::-webkit-scrollbar{width:4px}.params-panel::-webkit-scrollbar-thumb{background:var(--line);border-radius:2px}#paramsContainer{display:flex;flex-direction:column;gap:4px;margin-top:8px}#actionBar{position:fixed;bottom:24px;left:320px;right:24px;display:flex;justify-content:center;gap:8px;pointer-events:none;z-index:9}#actionBar:empty{display:none}#actionBar>*{pointer-events:auto}html[dir=rtl] #stage{left:24px;right:320px}html[dir=rtl] .params-panel{left:auto;right:20px}html[dir=rtl] #actionBar{left:24px;right:320px}.geom-actionbar{display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--panel-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--line);border-radius:12px}.geom-actionbar-presets{display:flex;align-items:center;gap:6px}.geom-actionbar-btn{padding:7px 13px;border:1px solid var(--line);background:var(--input-bg);border-radius:8px;font-family:inherit;font-size:12px;font-weight:500;color:var(--ink);cursor:pointer;line-height:1;transition:background .12s ease,border-color .12s ease}.geom-actionbar-btn:hover{background:var(--bg-2);border-color:var(--ink-soft)}.geom-actionbar-btn:active{background:var(--active-bg);color:var(--accent);border-color:var(--accent)}.geom-actionbar-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.geom-actionbar-btn:disabled{opacity:.4;cursor:not-allowed}