:root{color-scheme:light;--bg:#edf2f6;--surface:#fff;--ink:#233244;--muted:#647588;--line:#d9e2e9;--old:#bf7741;--new:#238579;--blue:#477ebd;--sans:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;--mono:"SFMono-Regular",Consolas,monospace}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.6 var(--sans)}button,input,select{font:inherit}button,select{cursor:pointer}button{color:inherit}a{color:#346c89;text-underline-offset:3px}button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible,summary:focus-visible,.canvas-host:focus-visible{outline:3px solid #5e9dc7;outline-offset:3px}button:disabled{opacity:.5;cursor:default}button{transition:background .15s}input[type=checkbox]{accent-color:var(--new);width:14px;height:14px;margin:0 6px 0 0;vertical-align:-2px}input[type=range]{accent-color:var(--new);cursor:pointer;min-width:60px}select{border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink);padding:7px 28px 7px 10px}.header{max-width:1600px;margin:auto;padding:24px 34px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:14px}.brand-mark{width:43px;height:43px;display:grid;place-items:center;background:#294b62;color:#fff;border-radius:10px;font-size:30px;line-height:1}h1{font-size:22px;font-weight:650;letter-spacing:.03em;line-height:1.2;margin:0}.brand p{font-size:12px;color:var(--muted);margin:6px 0 0}.text-link{font-size:12px;text-decoration:none}.layout{max-width:1600px;display:grid;grid-template-columns:228px minmax(0,1fr);margin:auto}.sidebar{padding:28px 18px 30px 28px;border-right:1px solid var(--line)}.nav-heading{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);margin:0 12px 22px}.nav-heading span{font-family:var(--mono)}.nav-group{margin:23px 12px 8px;font-size:11px;color:#798794;letter-spacing:.07em}.nav-group:first-child{margin-top:0}.scene-button{display:flex;align-items:center;width:100%;border:0;background:transparent;text-align:left;padding:11px 12px;margin:2px 0;border-radius:7px;font-size:13px;gap:9px}.scene-button span{font:11px var(--mono);color:#8593a2;min-width:18px}.scene-button:hover{background:#e1e9ef}.scene-button[aria-current=true]{background:#dceae9;color:#146558;font-weight:600}.scene-button[aria-current=true] span{color:#3c897f}.sidebar-note{font-size:11px;color:var(--muted);line-height:1.9;margin:28px 12px}main{padding:26px 30px 20px;min-width:0}.intro{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:22px}.scene-group{font-size:11px;color:var(--new);margin:0 0 5px}h2{font-size:28px;letter-spacing:-.025em;line-height:1.3;margin:0;font-weight:650}#scene-description{color:var(--muted);font-size:13px;margin:8px 0 0;max-width:700px}.version-control{font-size:11px;display:grid;gap:5px;color:var(--muted);flex-shrink:0}.version-control select{font-size:12px;min-width:148px}.view-tools{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:12px;flex-wrap:wrap}.segmented{display:flex;padding:3px;background:#dde5ed;border-radius:7px}.segmented button{border:0;background:none;padding:5px 12px;font-size:12px;border-radius:4px}.segmented button[aria-pressed=true]{background:white;box-shadow:0 1px 3px #25425512}.view-options{display:flex;align-items:center;gap:14px;font-size:11px;color:var(--muted);flex-wrap:wrap}.quiet{background:none;border:0;padding:4px;color:var(--muted);font-size:11px}.quiet:hover{color:var(--ink)}.comparison{display:grid;grid-template-columns:1fr 1fr;gap:14px}.viewport{position:relative;background:#f8fafb;border:1px solid #d1dce5;border-radius:10px;overflow:hidden;min-width:0}.view-label{display:flex;align-items:center;gap:9px;position:absolute;top:16px;left:18px;z-index:1;pointer-events:none}.view-label strong{font-size:13px;font-weight:600}.view-label>span:last-child{font:11px var(--mono);color:var(--muted)}.dot{width:7px;height:7px;border-radius:50%;display:inline-block;background:var(--old);flex-shrink:0}.current .dot,.new-dot{background:var(--new)}.canvas-host{height:clamp(300px,40vw,445px);touch-action:none}.canvas-host canvas{display:block;width:100%;height:100%}.state{display:flex;gap:12px;align-items:center;padding:12px 16px;border-top:1px solid var(--line);background:#fff;font-size:11px;min-height:47px}.state>span{color:#7c8996;flex-shrink:0}.state strong{font-weight:500;color:#8b572d}.current .state strong{color:#187465}.canvas-hint{display:flex;justify-content:space-between;color:#7c8996;font-size:10px;margin:9px 2px 17px;gap:10px}.canvas-hint i{display:inline-block;width:7px;height:7px;border-radius:2px;margin:0 4px 0 10px}.legend-tank{background:#99694f}.legend-survivor{background:var(--blue)}.canvas-hint .legend-path{border-top:1px dashed #7d909b;height:3px;width:15px;border-radius:0}.player{background:#fff;border:1px solid var(--line);border-radius:9px;padding:15px 18px}.play-row{display:flex;align-items:center;gap:13px}.primary{border:0;background:#294b62;color:#fff;border-radius:6px;padding:8px 13px;min-width:83px;font-size:12px;white-space:nowrap}.primary:hover{background:#376880}.restart{background:none;border:0;font-size:23px;padding:0 2px;color:var(--muted);line-height:1}.timeline-label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}#timeline{flex:1}#time{font:11px var(--mono);white-space:nowrap;color:var(--muted);min-width:97px}.speed-label{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--muted)}.speed-label select{padding:4px 7px;font-size:11px}.loop-label{font-size:11px;color:var(--muted);white-space:nowrap}.moments{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:13px;padding-top:12px;border-top:1px solid #edf1f4}.moments:before{content:attr(data-label);font-size:10px;color:#7c8996;margin-right:4px}.moment{border:0;background:#f1f5f7;border-radius:4px;color:#647588;font-size:10px;padding:4px 7px}.moment:hover,.moment[aria-current=true]{background:#e0eeea;color:#187465}.moment b{font:10px var(--mono);margin-right:6px;color:#466578}.movement-options{display:flex;align-items:center;gap:23px;flex-wrap:wrap;font-size:11px;color:var(--muted);padding:15px 1px 1px}.movement-options[hidden]{display:none}.movement-options select{font-size:11px;padding:4px 22px 4px 8px;margin-left:8px}.movement-options>span{color:#748391}.explanation{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding:24px 1px 14px}h3{font-size:12px;font-weight:600;display:flex;align-items:center;gap:7px;margin:0 0 8px}.explanation p{font-size:12px;color:var(--muted);margin:0;line-height:1.95}.basis{border-top:1px solid var(--line);padding:13px 1px;font-size:11px;color:var(--muted)}summary{cursor:pointer;color:#4c6377}.basis p{line-height:1.85;max-width:1050px;margin:10px 0}.basis code{font-size:10px}footer{font-size:10px;color:#81909d;display:flex;justify-content:space-between;padding-top:10px}#load-error{background:#fff1e6;border:1px solid #dc9b70;border-radius:6px;padding:18px;margin-top:12px;overflow-wrap:anywhere}noscript{display:block;padding:20px}
@media(min-width:1450px){main{padding:32px 38px}.canvas-host{height:470px}.sidebar{padding-left:30px}}
@media(max-width:1100px){.layout{grid-template-columns:195px minmax(0,1fr)}.sidebar{padding-left:14px;padding-right:12px}main{padding:24px 20px}.header{padding:20px 24px}.view-options{gap:10px}.intro{gap:12px}h2{font-size:24px}.canvas-host{height:330px}.comparison{gap:10px}.play-row{gap:9px}.speed-label{font-size:0}.explanation{gap:20px}}
@media(max-width:800px){.header{padding:18px 20px}.layout{display:block}.sidebar{border-right:0;border-bottom:1px solid var(--line);padding:12px 20px}.nav-heading,.nav-group,.sidebar-note{display:none}#scenarios{display:flex;overflow-x:auto;gap:4px;padding-bottom:3px}.scene-button{width:auto;white-space:nowrap;flex-shrink:0;padding:8px 10px;font-size:12px}.scene-button span{display:none}main{padding:22px 18px}.intro{align-items:flex-start}h2{font-size:23px}#scene-description{font-size:12px}.version-control{font-size:10px}.version-control select{min-width:125px}.canvas-host{height:310px}.view-tools{gap:10px}.canvas-hint{font-size:9px}}
@media(max-width:540px){h1{font-size:19px}.brand-mark{width:36px;height:36px;font-size:25px}.brand{gap:10px}.brand p{font-size:10px}.text-link{font-size:10px}.header{padding:15px 16px}.sidebar{padding:10px 12px}main{padding:19px 12px}.intro{flex-wrap:wrap;gap:10px;margin-bottom:15px}.version-control{display:flex;align-items:center;gap:10px}.intro>div{width:100%}.view-options{gap:10px}.comparison{grid-template-columns:1fr;gap:10px}.canvas-host{height:270px}.view-label{top:12px;left:14px}.state{padding:9px 13px;min-height:39px}.canvas-hint{flex-wrap:wrap;margin-bottom:12px}.player{padding:12px}.play-row{flex-wrap:wrap;gap:9px}#timeline{min-width:100px;order:5;flex-basis:70%}#time{order:6;text-align:right}.speed-label{margin-left:auto}.moments{gap:6px}.movement-options{gap:12px;padding-top:12px}.explanation{grid-template-columns:1fr;gap:15px;padding-top:20px}.basis{font-size:11px}footer{gap:10px;flex-wrap:wrap}.primary{padding:7px 10px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
/* Keep the comparison and playback controls together on a laptop viewport. */
@media(min-width:801px){.canvas-host{height:clamp(245px,calc(100dvh - 455px),390px)}}

/* Localized labels can wrap without widening the comparison or its controls. */
.header{gap:16px;flex-wrap:wrap}.header-actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.anne-i18n-switcher{display:flex;align-items:center;gap:8px;font-size:12px}.anne-i18n-switcher select{max-width:150px}.intro>div{min-width:0}.view-label{flex-wrap:wrap;right:12px}.explanation p,.basis p,.state strong{overflow-wrap:anywhere}.state{align-items:flex-start}.play-row{flex-wrap:wrap}.version-control select{max-width:240px}@media(max-width:540px){.header-actions{width:100%;justify-content:space-between}.version-control{flex-wrap:wrap}.version-control select{max-width:100%}}
.snapshot-note{font-size:11px;color:var(--muted);margin:12px 0}