:root{color-scheme:light;--ink:#232335;--muted:#6c6b79;--rule:#e4e3e8;--accent:#5842ad;--paper:#fafafa;--violet:#271337}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--accent);text-underline-offset:3px}header{padding:19px 4%;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--rule);background:white}.brand{font-size:18px;font-weight:700;text-decoration:none;color:var(--ink)}nav{display:flex;gap:25px;flex-wrap:wrap}nav a{font-size:14px;text-decoration:none;color:var(--muted)}main{max-width:1440px;margin:auto;padding:28px 4%}.intro{display:flex;justify-content:space-between;align-items:center;gap:30px;margin-bottom:24px}.intro>p{color:var(--muted);font-size:16px}.eyebrow{font-size:12px;font-weight:650;letter-spacing:.15em;margin:0 0 7px;color:var(--accent)}h1{font:500 clamp(28px,3vw,42px)/1.15 Georgia,serif;letter-spacing:-.03em;margin:0}h2{font:500 27px/1.25 Georgia,serif;margin:0 0 14px}p{margin:0 0 16px}.groups{display:grid;grid-template-columns:repeat(6,1fr);border:1px solid var(--rule);border-radius:8px;overflow:hidden;margin-bottom:24px;background:white}.group{border:0;border-radius:0;border-right:1px solid var(--rule);padding:13px 15px;text-align:left;background:white;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:8px}.group:last-child{border-right:0}.group strong{font:24px Georgia,serif;white-space:nowrap}.group span{font-size:12px;color:var(--muted)}.group[aria-pressed=true]{background:#eeeaf9;box-shadow:inset 0 -3px var(--accent)}.group[aria-pressed=true] strong{color:var(--accent)}.lab{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(285px,1fr);gap:32px;align-items:start}.canvas-wrap{position:relative;line-height:0;background:var(--violet);border-radius:8px;overflow:hidden}.canvas-wrap canvas{width:100%;display:block;aspect-ratio:1;cursor:pointer}.image-label{position:absolute;top:18px;left:18px;right:18px;display:flex;justify-content:space-between;gap:12px;pointer-events:none;line-height:1.4;color:#fff;font-size:12px;text-shadow:0 1px 4px #000}.image-label span{padding:5px 8px;background:#1b1626c9;border-radius:4px}.scale-label{position:absolute;bottom:18px;right:18px;color:#fff9;font-size:12px;line-height:1.4}.playback{display:flex;align-items:center;gap:10px;margin:14px 0}.playback input{min-width:30px;flex:1;padding:0;accent-color:var(--accent)}.playback label{font-size:12px;display:flex;gap:5px;align-items:center}.playback select{padding:4px}.playback output{font:12px ui-monospace,monospace;white-space:nowrap}.playback button{padding:5px 9px;white-space:nowrap}.caption{font-size:14px;line-height:1.55;min-height:44px;color:var(--muted)}.metrics{display:grid;grid-template-columns:repeat(4,1fr);padding:17px 0;border-block:1px solid var(--rule);gap:12px}.metrics span{display:block;font-size:12px;color:var(--muted)}.metrics strong{font:500 19px/1.8 ui-monospace,monospace}.controls{padding:2px 0}.selected h2{font:36px Georgia,serif}.selected p:not(.eyebrow){font-size:14px}.selected code{font:13px/1.7 ui-monospace,monospace;background:#f0edf7;display:block;padding:8px 10px;border-radius:5px;white-space:pre-wrap}.small{font-size:12px!important;color:var(--muted);margin:8px 0 13px}.workflow{display:grid;gap:6px;margin:18px 0}.workflow button{text-align:left;border-color:transparent;background:#f0f0f3;color:var(--muted);font-size:12px}.workflow button span{font-size:14px;margin-left:12px}.workflow button.active{background:var(--ink);color:white}.settings{display:grid;gap:11px}.settings>label{display:grid;grid-template-columns:100px 1fr;align-items:center;font-size:14px}.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}.two label{font-size:12px;color:var(--muted)}.two input,.two select{width:100%;display:block;margin-top:3px;color:var(--ink)}input,select,button{font:inherit;background:white;border:1px solid #d6d3dd;border-radius:5px;padding:7px 9px;color:var(--ink)}select{max-width:100%;font-size:14px}button{cursor:pointer;transition:background .12s}button:hover{background:#efedf6}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,canvas:focus-visible{outline:3px solid #9d78f2;outline-offset:3px}.actions{display:flex;gap:8px;margin-top:12px}.primary{background:var(--accent);color:white;border-color:var(--accent);flex:1}.primary:hover{background:#46318f}#status{font-size:13px;line-height:1.5;margin:13px 0 3px;overflow-wrap:anywhere}.text-button{border:0;background:transparent;font-size:13px;color:var(--accent);padding-left:0}progress{width:100%;margin-top:12px;accent-color:var(--accent)}.comparison{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:26px;margin:42px 0 60px;padding:26px;background:white;border:1px solid var(--rule);border-radius:8px;align-items:center}.comparison p{font-size:14px}.comparison figure{margin:0}.comparison canvas{width:100%;aspect-ratio:1;border-radius:5px;background:#271337}.comparison figcaption{text-align:center;font:13px ui-monospace,monospace;padding-top:8px}.reading{max-width:1100px;margin:0 auto 55px}.reading h2{font-size:32px}.reading p{color:#575562}.table-scroll{overflow:auto}table{width:100%;border-collapse:collapse;font-size:14px;margin:22px 0}th{text-align:left;color:var(--muted);font-size:12px;font-weight:500}td,th{border-bottom:1px solid var(--rule);padding:12px 16px 12px 0}td:first-child{white-space:nowrap;font-size:17px}td:last-child{color:#45705a;white-space:nowrap}.method{display:grid;grid-template-columns:1fr 1fr;gap:44px;padding-top:35px;border-top:1px solid var(--rule)}pre{font:clamp(12px,1.1vw,15px)/1.9 ui-monospace,monospace;white-space:pre-wrap;padding:18px;background:#f0edf7;border-radius:5px}footer{padding:28px 0;border-top:1px solid var(--rule);font-size:13px;color:var(--muted)}[hidden]{display:none!important}@media(min-width:1400px){.lab{grid-template-columns:760px 1fr}}@media(max-width:950px){main{padding:22px 3%}.lab{gap:22px;grid-template-columns:minmax(0,1.4fr) minmax(280px,1fr)}.group{padding:10px}.group strong{font-size:21px}.metrics{grid-template-columns:repeat(2,1fr)}.intro>p{font-size:14px}.playback label{display:none}.comparison{gap:16px;padding:18px}.comparison h2{font-size:24px}}@media(max-width:720px){.group{min-width:0;gap:3px;padding:10px 7px;flex-wrap:wrap}.group strong{font-size:20px}.group span{font-size:11px}header{padding:14px 4%;align-items:start;flex-direction:column;gap:7px}nav{gap:18px}.intro{display:block}.intro>p{margin-top:12px}.groups{grid-template-columns:repeat(3,1fr)}.group:nth-child(-n+3){border-bottom:1px solid var(--rule)}.group:nth-child(3){border-right:0}.lab{display:flex;flex-direction:column}.viewer,.controls{width:100%}.canvas-wrap{border-radius:5px}.metrics{grid-template-columns:repeat(4,1fr)}.metrics strong{font-size:14px}.metrics span{font-size:11px}.controls{padding:12px 0}.comparison{grid-template-columns:1fr 1fr;margin-top:24px}.comparison>div{grid-column:1/-1}.method{grid-template-columns:1fr;gap:20px}.reading h2{font-size:27px}.image-label{top:10px;left:10px;right:10px;font-size:11px}}

@media(max-width:450px){.playback{flex-wrap:wrap}.playback label{display:flex}.playback label:last-child{display:none}.playback input{flex-basis:100px}.image-label{align-items:start}.image-label span:last-child{white-space:nowrap}}

#play-affordance{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:62px;height:62px;border-radius:50%;background:#ffffffed;color:#2c1a3b;display:grid;place-items:center;font-size:25px;line-height:1;padding-left:4px;box-shadow:0 2px 15px #0003;pointer-events:none}
/* Exploration controls and the shared GPU / generator viewport. */
.filter-bar{display:flex;gap:14px;align-items:center;padding:14px 18px;background:#f0edf7;border:1px solid #ded6ed;border-radius:7px}.filter-bar label{font-size:14px;font-weight:600}.filter-bar select{min-width:245px}.filter-bar span{margin-left:auto;font:12px ui-monospace,monospace;color:var(--accent)}.filter-bar+.small{margin:9px 0 22px}.lab{grid-template-columns:minmax(0,1.7fr) minmax(300px,1fr)}.canvas-wrap{isolation:isolate;aspect-ratio:1}.canvas-wrap>canvas{position:absolute;inset:0}.canvas-wrap>.image-label{z-index:3}.canvas-wrap>.scale-label{z-index:3}.generator-overlay{position:absolute;inset:0;width:100%;height:100%;z-index:2;pointer-events:none}.generator-overlay [role=button]{pointer-events:all}#empty-state{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.5;text-align:center;color:#fff;background:radial-gradient(ellipse,#261638ee,#261638b0);padding:55px 15%;z-index:3}#empty-state .empty-symbol{font:64px Georgia,serif;color:#aa92c7;margin-bottom:20px}#empty-state p{font-size:14px;color:#cbbfd7;max-width:330px}#empty-state h2{font-size:28px}#empty-state button{flex:0;background:#f0e8ff;border-color:#f0e8ff;color:#301d4b;padding:10px 17px}.overlay-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:10px 0}.overlay-controls label{font-size:12px;white-space:nowrap}.overlay-controls input{accent-color:var(--accent)}.overlay-controls select{font-size:12px;flex:1;min-width:130px}#engine-label{font:11px ui-monospace,monospace;color:var(--muted)}.selected{display:grid;grid-template-columns:1fr auto;gap:2px 12px}.selected h2{grid-column:2;grid-row:1/3;font-size:32px}.selected>p:not(.eyebrow){grid-column:1/-1}.selected>.eyebrow{align-self:center}.group strong sup,.selected h2 sup{font-size:.55em}.stack{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px}.stack select{flex:1;min-width:0}.parameter-map-wrap{margin:12px 0}.parameter-map-wrap canvas{width:100%;display:block;border:1px solid var(--rule);border-radius:5px;cursor:crosshair;background:white}.parameter-map-wrap p{font-size:11px!important}fieldset{border:0;padding:0;margin:0 0 12px;display:grid;gap:12px;min-width:0}fieldset:disabled{opacity:.55}.two input[type=range]{padding:0;accent-color:var(--accent);height:18px}.controls details{margin:15px 0;padding:12px 0;border-block:1px solid var(--rule);font-size:13px}.controls details+details{border-top:0;margin-top:-15px}.controls summary{cursor:pointer;color:var(--accent);font-weight:600}.controls details[open] summary{margin-bottom:12px}.controls details .two{margin-bottom:10px}.actions{gap:6px}.actions button{font-size:13px}.comparison{grid-template-columns:1fr 1fr;gap:18px;margin:24px 0 0;padding:20px}.comparison>div{grid-column:1/-1}.comparison p{margin-bottom:5px}.comparison canvas{max-height:230px;object-fit:contain}.comparison figcaption{font-size:12px}.viewer{min-width:0}.reading{margin-top:50px}.scan-point{font:11px ui-monospace,monospace;text-align:left;width:100%;margin-top:4px}.scan-point.moving-pattern{color:#2d705b}.scan-point.uniform-or-decayed,.scan-point.stationary-pattern{color:#9a5a2a}button:disabled{cursor:not-allowed}.empty-filter .parameter-map-wrap{opacity:.35}.empty-filter #parameter-map{cursor:default}
@media(min-width:1400px){.lab{grid-template-columns:760px 1fr}}@media(max-width:1050px){.lab{grid-template-columns:minmax(0,1.3fr) minmax(290px,1fr);gap:24px}.playback{flex-wrap:wrap}.playback label{display:flex}.playback label:last-child{display:none}#empty-state{padding:45px 8%}#empty-state h2{font-size:23px}#empty-state .empty-symbol{margin-bottom:5px;font-size:40px}.filter-bar{flex-wrap:wrap}.filter-bar span{margin-left:0}}
@media(max-width:720px){.lab{display:flex}.filter-bar{padding:12px}.filter-bar select{flex:1;min-width:180px;font-size:13px}.filter-bar label{font-size:12px}.filter-bar span{font-size:11px}.intro{margin-bottom:18px}.controls{padding-top:5px}.selected h2{font-size:35px}.viewer .caption{min-height:0}.comparison{margin-bottom:15px}.generator-overlay{font-size:12px}#empty-state h2{font-size:24px}#empty-state p{font-size:13px}#empty-state{padding:44px 10%}.overlay-controls{gap:7px}.metrics{gap:8px}.reading{margin-top:36px}.controls details{font-size:14px}}
/* Strict cyclic-time solution atlas. Search guesses never occupy the viewer. */
.solution-policy{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;background:#f0edf7;border:1px solid #ded6ed;border-radius:7px;padding:14px 18px;margin-bottom:24px;font-size:14px}.solution-policy p{flex-basis:100%;margin:0;font-size:13px;color:var(--muted)}.solution-policy>span{font:12px ui-monospace,monospace;color:var(--accent)}.phase-rule{padding:12px 15px;background:#f0edf7;border-radius:6px;margin:12px 0}.phase-rule>p:first-child{font-size:13px;margin-bottom:9px}.phase-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:12px}.phase-chip{display:inline-flex;align-items:center;gap:5px;padding:3px 6px;background:white;border-radius:4px}.phase-chip i{display:inline-block;width:11px;height:11px;border-radius:50%;background:var(--phase-color)}.phase-arrow{color:var(--muted)}.phase-rule .small{margin:8px 0 0}.atlas-panel{padding:14px 16px;margin-bottom:18px;background:white;border:1px solid var(--rule);border-radius:6px}.atlas-panel h3{font:500 21px Georgia,serif;margin:0 0 12px}.atlas-panel>select{width:100%}.atlas-panel .parameter-map-wrap{margin:14px 0 7px}.atlas-panel p:last-child{margin-bottom:0}.atlas-panel canvas[aria-disabled=true]{cursor:default}.trial-results{margin-top:15px}.trial-result{border-left:3px solid #c7bcd5;padding:9px 11px;background:#f5f2f8;margin-top:8px;font-size:12px}.trial-result strong{display:block;font-weight:600}.trial-result p{margin:4px 0 0;color:var(--muted)}.trial-result.accepted{border-color:#428a6f}.controls #search-panel{margin-top:18px}.controls #search-panel .stack{margin-bottom:10px}.controls #search-panel .actions{flex-wrap:wrap}.controls #search-panel .actions button{flex:1;min-width:130px}.selected>p:last-child{margin-bottom:14px}#phase-permutation{min-height:28px}.caption{min-height:0}#search-results:empty{display:none}#map-status{min-height:35px}.canvas-wrap #empty-state{pointer-events:none}.canvas-wrap #empty-state button{pointer-events:all}@media(max-width:720px){.solution-policy{font-size:13px;padding:12px}.solution-policy p{font-size:12px}.phase-row{gap:5px}.atlas-panel{padding:14px}.trial-result{font-size:12px}.selected{margin-top:15px}}
.orbit-count{display:block;font:10px/1.4 -apple-system,BlinkMacSystemFont,sans-serif;color:var(--muted);margin-top:3px}.group>span{text-align:right}.group[aria-pressed=true] .orbit-count{color:var(--accent)}
/* Symmetry → fixed physical parameters → one of the known patterns. */
.selection-step{margin-bottom:9px}.atlas-label{display:block;font-size:12px;color:var(--muted);margin:6px 0}.atlas-panel #parameter-set,.atlas-panel #solution{width:100%;min-width:0}.parameter-values{font:12px/1.7 ui-monospace,monospace;overflow-wrap:anywhere;background:#f5f3fa;border-radius:5px;padding:10px;margin:10px 0 0}.pattern-section{border-top:1px solid var(--rule);padding-top:17px;margin-top:18px}.pattern-section h3{margin-bottom:5px}.pattern-thumbnails{display:grid;grid-template-columns:repeat(auto-fit,minmax(125px,1fr));gap:9px;margin:12px 0}.pattern-thumb{padding:6px;text-align:left;max-width:200px;border:2px solid var(--rule);background:#fff}.pattern-thumb[aria-pressed=true]{border-color:var(--accent);background:#f0edf7}.pattern-thumb img{display:block;width:100%;height:auto;aspect-ratio:1;border-radius:3px}.pattern-thumb span{display:block;font-size:11px;line-height:1.45;padding:7px 3px 2px}.pattern-thumb:focus-visible,#parameter-set:focus-visible,#solution:focus-visible{outline:3px solid #9d78f2;outline-offset:3px}.atlas-panel>.eyebrow,.pattern-section>.eyebrow{font-size:10px}.controls>#status{padding:10px 0;color:var(--muted)}@media(max-width:720px){.pattern-thumbnails{grid-template-columns:repeat(auto-fit,minmax(125px,1fr))}.parameter-values{font-size:11px}.atlas-panel #parameter-set{font-size:12px}.pattern-thumb{max-width:180px}}

/* Three actual fields share one time origin, spatial view, and color range. */
.comparison{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;padding:20px}.comparison-heading{grid-column:1/-1}.comparison-heading p:last-child{margin-bottom:0}.comparison figcaption{font:12px/1.5 system-ui,sans-serif;overflow-wrap:anywhere}.comparison figcaption strong,.comparison figcaption span{display:block}.comparison figcaption span{font-size:11px;color:var(--muted)}#visibility-explanation{color:var(--accent)}@media(max-width:450px){.comparison{gap:9px;padding:12px}.comparison figcaption{font-size:11px}.comparison figcaption span{font-size:10px}}

/* A visible cell block, rather than an unlabeled square crop of many repeats. */
.cell-guide{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}.cell-guide[hidden]{display:none}
.canvas-wrap.cell-framing{background:#eee9f3}.cell-framing .scale-label{color:#493b5d;text-shadow:none}.cell-framing .cell-boundary{stroke:#9c8daf}.cell-framing .cell-divisions{stroke:#fff;filter:drop-shadow(0 0 1px #302140)}
.approximate-controls{padding:12px 14px;background:#fff7e9;border:1px solid #edd2a6;border-radius:8px;margin:12px 0}.approximate-controls[hidden]{display:none}.approximate-controls label{display:flex;gap:8px;align-items:center;font-size:13px;font-weight:600}.approximate-controls p{margin-bottom:0}
.approximate-view-label{position:absolute;bottom:30px;left:10px;border-radius:4px;background:#281a10dd;color:#ffd495;padding:4px 7px;font-size:11px;line-height:1.4;pointer-events:none}.approximate-view-label[hidden]{display:none}

/* Keep status text clear of rotation centres on all four cell boundaries. */
.viewer-labels{position:static;margin:0 0 8px;line-height:1.4;color:var(--muted);text-shadow:none;font-size:11px}.viewer-labels span{background:#eee9f3;color:#493b5d}
.view-caption{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;margin-top:8px;line-height:1.4;min-height:16px}
.view-caption .scale-label{position:static;margin-left:auto;color:#493b5d;text-shadow:none;font-size:11px;line-height:1.4}.view-caption .approximate-view-label{position:static;line-height:1.4}
/* Compact atlas controls, with numerical details available on demand. */
.numerical-record{font-size:12px;color:var(--muted);margin:18px 0;border-top:1px solid var(--rule);padding-top:12px}.numerical-record summary{cursor:pointer}.numerical-record[open] summary{margin-bottom:12px}.phase-rule>p:first-child{margin:0}#family-nav{font-size:13px;min-width:150px}.playback label:last-child{display:flex}.groups.variable-groups{grid-template-columns:repeat(var(--group-count,6),minmax(0,1fr))}@media(max-width:720px){.groups.variable-groups{grid-template-columns:repeat(min(3,var(--group-count,3)),minmax(0,1fr))}.numerical-record{margin-bottom:6px}}