:root{--white:#fff;--paper:#f2f4f6;--ink:#172331;--muted:#738193;--line:#e1e6ec;--blue:#245ddd;--ease:cubic-bezier(.23,1,.32,1)}
*{box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden}body{margin:0;background:var(--white);color:var(--ink);font:12px "Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;display:grid;grid-template-rows:62px minmax(0,1fr)}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer;border:0}button,a{transition:color 180ms ease,background-color 180ms ease,transform 180ms var(--ease),border-color 180ms ease,box-shadow 180ms ease}button:active{transform:scale(.96)}button:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--blue);outline-offset:3px}a{color:inherit;text-decoration:none}.svg-defs{position:absolute;width:0;height:0;overflow:hidden}.icon{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.header{display:flex;align-items:center;justify-content:space-between;padding:0 25px;border-bottom:1px solid var(--line);gap:20px}.wordmark{display:flex;align-items:center;gap:11px;font-size:15px;font-weight:650;white-space:nowrap}.brand-glyph{color:var(--blue)}.wordmark-en{font:italic 12px Georgia,serif;color:#8090a1;font-weight:400;margin-left:8px}.header-right{display:flex;align-items:center;gap:30px}.header-specs{display:flex;gap:23px;font-size:11px;color:#657587;font-variant-numeric:tabular-nums}.source-link{display:flex;align-items:center;gap:7px;background:transparent;color:#657587;font-size:11px;padding:8px 0}.source-link .icon{width:14px;height:14px}
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.viewer-layout{display:grid;grid-template-columns:156px minmax(0,1fr) 272px;min-height:0;min-width:0}.system-nav{padding:22px 12px 16px;background:#fbfcfd;display:flex;flex-direction:column;border-right:1px solid var(--line);min-height:0;z-index:3}.nav-label{font-size:10px;color:#8996a5;padding:0 8px;margin-bottom:20px}.system-item{display:flex;align-items:center;gap:10px;text-align:left;background:transparent;padding:14px 8px;border-radius:6px;margin-bottom:6px;position:relative;min-height:57px}.system-item>span{font:12px Georgia,serif;color:#8e9fb2;flex-shrink:0}.system-item div{display:flex;flex-direction:column;gap:6px}.system-item strong{font-size:11px;font-weight:500;white-space:nowrap}.system-item small{font-size:8px;color:#8e9cad;white-space:nowrap}.system-item .icon{width:11px;height:11px;color:#90a3ba;position:absolute;right:4px;opacity:0}.system-item.active{background:#eaf0fc;color:var(--blue)}.system-item.active>span{color:var(--blue)}.system-item.active .icon{opacity:1}.nav-foot{margin-top:auto;padding:20px 8px 0;color:#8996a7}.precision-mark{font:15px Georgia,serif;color:#63778e}.nav-foot p{font-size:9px;line-height:1.9;margin:9px 0 0}
.viewport{min-width:0;min-height:0;position:relative;background:var(--paper);overflow:hidden;touch-action:none;isolation:isolate}.viewport canvas{display:block;position:absolute;inset:0;outline:0;width:100%;height:100%;z-index:1;cursor:grab}.viewport canvas:active{cursor:grabbing}.viewer-corner{position:absolute;z-index:2;pointer-events:none}.top-left{top:23px;left:25px;display:flex;flex-direction:column;transition:opacity 250ms ease}.top-left>span{font-size:10px;color:#8795a5}.top-left b{font:34px Georgia,serif;color:#a4b1bf;line-height:1.15;margin-top:7px}.top-left em{font:9px "Microsoft YaHei",sans-serif;color:#8999aa;margin-top:8px}.detail-view .top-left{opacity:0}.top-right{top:24px;right:22px;display:flex;flex-direction:column;gap:5px;align-items:flex-end}.top-right>span{font:15px Georgia,serif;color:#61768f}.top-right small{font-size:8px;color:#8a99aa}.viewport-tools{position:absolute;right:18px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:3px;z-index:3;padding:4px;border:1px solid #dce3ec;background:#ffffffed;backdrop-filter:blur(10px);border-radius:7px;box-shadow:0 3px 12px #22334a05}.viewport-tools button{background:transparent;width:29px;height:29px;display:grid;place-items:center;border-radius:4px;color:#68809a}.viewport-tools .icon{width:15px;height:15px}.viewport-tools>span{height:1px;background:var(--line);margin:3px 5px}.scale-bar{position:absolute;left:25px;bottom:27px;z-index:2;display:flex;flex-direction:column;gap:7px;align-items:center;color:#74879e;pointer-events:none}.scale-bar>span{display:block;width:71px;height:4px;border-left:1px solid #8c9eb3;border-right:1px solid #8c9eb3;border-bottom:1px solid #8c9eb3}.scale-bar small{font:9px Georgia,serif}.view-hint{position:absolute;bottom:27px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:6px;z-index:2;color:#8292a6;font-size:9px;white-space:nowrap;pointer-events:none}.view-hint .icon{width:13px;height:13px}.render-note{position:absolute;bottom:11px;left:50%;transform:translateX(-50%);font-size:8px;color:#a0acba;z-index:2;white-space:nowrap;pointer-events:none}
.inspector{border-left:1px solid var(--line);padding:22px 22px 16px;display:flex;flex-direction:column;min-height:0;min-width:0;background:#fff;z-index:3}.inspector-top{display:flex;align-items:center;justify-content:space-between;font-size:10px;color:#8997a8}.status{display:flex;align-items:center;gap:5px}.status:before{content:"";width:4px;height:4px;border-radius:50%;background:#4479d9}.paused .status:before{background:#9ba8b8}.inspector-copy{margin-top:26px}.small-en{font:italic 12px Georgia,serif;color:#8393a7;margin:0 0 12px}.inspector-copy h2{font-size:18px;font-weight:500;line-height:1.6;margin:0 0 14px}.chapter-body{font-size:11px;line-height:2;color:#6d8097;margin:0}.component-note{margin-top:20px;padding-top:15px;border-top:1px solid var(--line)}.component-note>span{font-size:9px;color:#95a1ae}.component-note p{font-size:10px;line-height:1.9;color:#8090a4;margin:8px 0 0}.part-shortcuts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;margin-top:17px}.part-shortcuts button{font-size:10px;text-align:left;background:#f5f7fa;border:1px solid #e8edf3;padding:8px 7px;border-radius:4px;color:#58718f;white-space:nowrap}.part-shortcuts button.active{color:var(--blue);background:#edf3ff;border-color:#c7d7f8}.detail-focus{display:flex;align-items:center;justify-content:space-between;width:100%;font-size:10px;padding:12px 0;background:transparent;color:#4776b7;border-bottom:1px solid var(--line);margin-top:6px}.detail-focus .icon{width:13px;height:13px}.dial-wrap{display:flex;align-items:center;flex-direction:column;margin-top:auto;padding-top:18px}#time-dial{width:92px;height:92px}#time-readout{font:17px Georgia,serif;color:#354d6b;letter-spacing:.07em;margin-top:8px;font-variant-numeric:tabular-nums}.dial-wrap small{font-size:8px;color:#99a6b5;margin-top:6px}.power-box{padding-top:20px}.power-box>div:first-child{display:flex;align-items:baseline;justify-content:space-between;font-size:10px;color:#7b8ca0}.power-box b{font:16px Georgia,serif;color:#38516f}.power-box small{font:9px Georgia,serif;color:#99a7b8}.power-track{height:3px;border-radius:4px;background:#e8edf4;overflow:hidden;margin-top:10px}.power-track span{display:block;width:100%;height:100%;background:#4779cc;transform:scaleX(.615);transform-origin:left;transition:transform 450ms var(--ease)}.power-box p{font-size:8px;color:#9eabba;margin:7px 0 0}.precision-link{display:flex;align-items:center;justify-content:space-between;background:transparent;color:#8597af;width:100%;padding:10px 0 0;font-size:9px}.precision-link .icon{width:12px;height:12px}
.transport-bar{display:flex;align-items:center;justify-content:space-between;background:#fff;padding:0 20px;border-top:1px solid var(--line);gap:18px;z-index:4}.playback{display:flex;align-items:center;gap:14px}.play-button{width:34px;height:34px;display:grid;place-items:center;background:#21354f;color:#fff;border-radius:50%}.play-button .icon{width:15px;height:15px}.step-button{display:flex;align-items:center;gap:6px;background:transparent;color:#6c819c;padding:8px 0;font-size:11px}.step-button .icon{width:15px;height:15px}.transport-divider{height:18px;width:1px;background:var(--line);margin:0 3px}.speed-control{display:flex;gap:3px}.speed-control button{background:transparent;color:#8193ab;border-radius:5px;padding:8px 10px;font:11px Georgia,serif}.speed-control button.active{background:#edf3fc;color:#3165b6}.beat-readout{display:flex;align-items:center;gap:7px;font-size:10px;color:#8193a9;font-variant-numeric:tabular-nums}.beat-line{width:1px;height:10px;background:var(--line);margin:0 8px}#phase-readout{width:32px;display:inline-block}.wind-button{display:flex;align-items:center;gap:8px;border:1px solid #d8e3f4;background:#f1f5fc;color:#3a6bb5;font-size:11px;padding:9px 14px;border-radius:6px}.wind-button .icon{width:15px;height:15px}.wind-button small{font:11px Georgia,serif;color:#839fca;margin-left:8px}
.loader{position:absolute;inset:0;z-index:5;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--paper);transition:opacity 400ms var(--ease);pointer-events:none}.loader>span{width:34px;height:34px;border:1px solid #d4deeb;border-top-color:#5781bc;border-radius:50%;animation:loading 1s linear infinite}.loader p{font-size:11px;color:#8798af;margin-top:17px}.loader.done{opacity:0}.loader.failed{pointer-events:auto}.loader.failed>span{animation:none}.loader.failed p{max-width:300px;text-align:center;line-height:1.9}.loader-retry{margin-top:16px;font-size:11px;color:#245ddd;background:#edf3fe;border:1px solid #d9e4f6;border-radius:5px;padding:9px 18px;cursor:pointer}.toast{position:fixed;bottom:85px;left:50%;transform:translate(-50%,8px) scale(.97);opacity:0;pointer-events:none;z-index:30;background:#21354fed;color:#fff;padding:12px 19px;border-radius:7px;font-size:11px;transition:opacity 180ms ease,transform 220ms var(--ease);max-width:calc(100vw - 30px);text-align:center}.toast.show{opacity:1;transform:translate(-50%,0) scale(1)}.drawer-backdrop{position:fixed;inset:0;background:#1c2d4433;backdrop-filter:blur(3px);opacity:0;pointer-events:none;transition:opacity 240ms ease;z-index:20}.source-drawer{position:fixed;right:0;top:0;bottom:0;width:440px;max-width:100%;padding:53px 36px 36px;background:#fff;transform:translateX(100%);transition:transform 300ms var(--ease);z-index:21;overflow-y:auto;box-shadow:-10px 0 50px #1c304614}.drawer-open .drawer-backdrop{opacity:1;pointer-events:auto}.drawer-open .source-drawer{transform:translateX(0)}.source-drawer h2{font:29px "Songti SC",SimSun,serif;font-weight:400;margin:0 0 22px}.kicker{font-size:10px;color:#8391a3;margin:0 0 13px}.source-drawer>p:not(.kicker){font-size:11px;line-height:2.1;color:#78899e}.source-drawer h3{font-size:13px;font-weight:500;margin:27px 0 12px}.reference-link,.prompt-link{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line);font-size:11px;color:#4972ac;gap:12px}.reference-link .icon,.prompt-link .icon{width:14px;height:14px}.source-drawer dl{font-size:11px;margin:0}.source-drawer dl>div{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid #f0f2f5}.source-drawer dt{color:#8e9aaa}.source-drawer dd{margin:0;font-family:Georgia,serif;color:#51637b}.source-drawer p a{color:#4f72a4}.close-button{position:absolute;right:18px;top:18px;width:30px;height:30px;display:grid;place-items:center;background:#f3f5f8;border-radius:50%;color:#8a98a8}.reveal{animation:reveal 550ms var(--ease) both;animation-delay:var(--delay,0ms)}@keyframes reveal{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes loading{to{transform:rotate(360deg)}}
@media(hover:hover) and (pointer:fine){button:hover{transform:translateY(-1px)}.system-item:hover{background:#f0f4f9}.system-item.active:hover{background:#e5edfc}.system-item:hover .icon{opacity:1}.viewport-tools button:hover,.part-shortcuts button:hover{background:#e9f0fc;color:#245ddd}.speed-control button:hover{background:#f2f5fa;color:#4e73a9}.wind-button:hover{background:#e5eefd;border-color:#bfcfea}.source-link:hover,.source-drawer a:hover{color:var(--blue)}.play-button:hover{background:#315b94}}
@media(max-height:850px) and (min-width:901px){.inspector{padding:17px 20px 13px}.inspector-copy{margin-top:18px}.component-note{margin-top:13px;padding-top:11px}.part-shortcuts{margin-top:12px}.dial-wrap{padding-top:12px}#time-dial{width:69px;height:69px}.dial-wrap small{display:none}.power-box{padding-top:13px}.system-nav{padding-top:20px}.system-item{padding-top:12px;padding-bottom:12px;min-height:52px}.nav-label{margin-bottom:17px}}
@media(max-height:700px) and (min-width:901px){.component-note{display:none}.inspector-copy{margin-top:16px}.inspector-copy h2{font-size:16px;margin-bottom:8px}.chapter-body{font-size:10px;line-height:1.85}.small-en{font-size:11px;margin-bottom:8px}.part-shortcuts{gap:5px;margin-top:12px}.part-shortcuts button{padding:7px}.dial-wrap{flex-direction:row;justify-content:center;gap:10px}#time-dial{width:52px;height:52px}#time-readout{margin:0;font-size:15px}.precision-link{padding-top:7px}.power-box p{display:none}.system-item{min-height:45px;padding-top:10px;padding-bottom:10px}.nav-foot p{display:none}}
@media(max-width:1100px){.viewer-layout{grid-template-columns:132px minmax(0,1fr) 238px}.wordmark-en{display:none}.system-nav{padding-left:8px;padding-right:8px}.system-item{gap:7px}.system-item small{font-size:7px}.system-item .icon{display:none}.inspector{padding-left:17px;padding-right:17px}.header-specs{gap:16px}.beat-readout{display:none}.view-code{margin-left:8px}.top-left{left:19px}.top-left b{font-size:28px}.view-hint{font-size:8px}.header{padding:0 20px}}
@media(max-width:900px){body{grid-template-rows:54px minmax(0,1fr)}main{padding:9px 10px 10px}.header{padding:0 17px}.header-specs{gap:12px;font-size:10px}.source-link{font-size:10px}.observatory{grid-template-rows:44px minmax(0,1fr) 58px}.viewer-layout{grid-template-columns:minmax(0,1fr) 232px;grid-template-rows:50px minmax(0,1fr)}.system-nav{grid-column:1/-1;display:flex;flex-direction:row;padding:5px 9px;border-right:0;border-bottom:1px solid var(--line);gap:5px;min-height:0}.nav-label,.nav-foot{display:none}.system-item{flex:1;justify-content:center;gap:6px;padding:6px;min-height:0;margin:0}.system-item small{display:none}.system-item>span{font-size:10px}.system-item strong{font-size:10px}.inspector{grid-column:2;grid-row:2;padding:17px}.viewport{grid-column:1;grid-row:2}.inspector-copy{margin-top:18px}.component-note{margin-top:14px;padding-top:12px}.chapter-body{font-size:10px;line-height:1.9}.inspector-copy h2{font-size:16px;margin-bottom:10px}.small-en{font-size:11px}.part-shortcuts{margin-top:13px}.dial-wrap{padding-top:12px}#time-dial{width:72px;height:72px}.power-box{padding-top:14px}.dial-wrap small{display:none}.view-code{display:none}.view-header{padding:0 15px}.transport-bar{padding:0 15px}.top-left{top:19px;left:18px}.top-right{top:20px;right:17px}.viewport-tools{right:12px}.viewport-tools button{width:25px;height:25px}.viewport-tools .icon{width:14px;height:14px}.scale-bar{left:18px;bottom:25px}.render-note{display:none}.view-hint{bottom:13px;font-size:8px}.toast{bottom:76px}}
@media(max-width:640px){body{grid-template-rows:49px minmax(0,1fr)}.header{padding:0 13px;gap:10px}.wordmark{font-size:13px;gap:8px}.brand-glyph{width:24px;height:24px}.header-specs{display:none}.header-right{gap:0}.source-link{font-size:9px;gap:5px}main{padding:6px}.observatory{grid-template-rows:41px minmax(0,1fr) 57px;border-radius:7px}.view-header{padding:0 10px}.view-title{font-size:10px;gap:6px}.view-modes button{padding:5px 13px;font-size:10px}.viewer-layout{grid-template-columns:1fr;grid-template-rows:43px minmax(0,1fr) 166px}.system-nav{grid-column:1;grid-row:1;padding:5px 6px;gap:2px}.system-item{gap:4px;padding:5px 3px}.system-item>span{font-size:9px}.system-item strong{font-size:9px}.system-item:first-of-type{flex:.77}.system-item:first-of-type>span{display:none}.viewport{grid-column:1;grid-row:2}.inspector{grid-column:1;grid-row:3;border-left:0;border-top:1px solid var(--line);display:grid;grid-template-columns:minmax(0,1fr) 106px;grid-template-rows:14px auto 31px;gap:7px 13px;padding:11px 13px;overflow:hidden}.inspector-top{grid-column:1;grid-row:1;font-size:8px}.inspector-copy{grid-column:1;grid-row:2;margin-top:0}.small-en{display:none}.inspector-copy h2{font-size:13px;line-height:1.5;margin:0 0 5px}.chapter-body{font-size:9px;line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.component-note{display:none}.part-shortcuts{grid-column:1;grid-row:3;display:flex;gap:5px;margin:0;align-self:start}.part-shortcuts button{font-size:8px;padding:6px;flex:1;min-width:0}.part-shortcuts button:nth-child(n+4){display:none}.detail-focus{grid-column:2;grid-row:3;margin:0;font-size:8px;padding:6px 0;border:0;align-self:start}.detail-focus .icon{width:10px;height:10px}.dial-wrap{grid-column:2;grid-row:1/3;flex-direction:row;gap:6px;justify-content:center;align-self:start;margin:0;padding-top:3px}#time-dial{width:43px;height:43px}#time-readout{font-size:11px;margin:0;letter-spacing:0}.power-box{grid-column:2;grid-row:2;align-self:end;padding:0;margin-bottom:2px}.power-box>div:first-child{font-size:8px}.power-box b{font-size:11px}.power-box small{font-size:7px}.power-track{margin-top:5px}.power-box p,.precision-link{display:none}.transport-bar{padding:0 10px;gap:6px}.playback{gap:8px}.play-button{width:29px;height:29px}.play-button .icon{width:13px;height:13px}.step-button{font-size:9px;gap:3px}.step-button .icon{width:12px;height:12px}.transport-divider{margin:0;height:15px}.speed-control{gap:0}.speed-control button{font-size:10px;padding:7px 6px}.wind-button{gap:4px;font-size:9px;padding:8px}.wind-button small{display:none}.wind-button .icon{width:12px;height:12px}.top-left{top:16px;left:17px}.top-left>span{font-size:8px}.top-left b{font-size:27px;margin-top:4px}.top-left em{font-size:7px;margin-top:6px}.top-right{top:17px;right:15px}.top-right>span{font-size:12px}.top-right small{font-size:7px}.scale-bar{left:17px;bottom:20px}.scale-bar small{font-size:8px}.viewport-tools{right:10px;padding:3px;gap:1px}.viewport-tools button{width:24px;height:24px}.viewport-tools .icon{width:13px;height:13px}.view-hint{left:57%;font-size:7px;bottom:11px;gap:3px}.view-hint .icon{width:11px;height:11px}.source-drawer{padding-left:27px;padding-right:27px}.toast{bottom:72px;font-size:10px}}
@media(max-height:650px) and (max-width:640px){.viewer-layout{grid-template-rows:37px minmax(0,1fr) 137px}.inspector{padding-top:8px;padding-bottom:8px;gap:5px 10px;grid-template-rows:12px auto 25px}.chapter-body{-webkit-line-clamp:2}.inspector-copy h2{font-size:12px}.part-shortcuts button{padding:4px;font-size:8px}.detail-focus{padding:4px 0}.top-left em{display:none}}
@media(max-height:590px) and (min-width:641px){.component-note,.dial-wrap{display:none}.inspector-copy{margin-top:12px}.part-shortcuts{margin-top:12px}.power-box{margin-top:auto}.nav-foot{display:none}.header-specs{display:none}}
@media(prefers-reduced-motion:reduce){.reveal{animation:none}*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}.loader>span{animation:none}button:hover,button:active{transform:none}}

.view-switches{display:flex;align-items:center;gap:18px}.side-switch{display:flex;gap:4px;padding-right:18px;border-right:1px solid var(--line)}.side-switch button{padding:6px 12px;border-radius:4px;background:transparent;color:#8393a6;font-size:11px}.side-switch button.active{color:#245ddd;background:#edf3fe}@media(max-width:640px){.view-switches{gap:7px}.side-switch{gap:0;padding-right:7px}.side-switch button{font-size:9px;padding:5px 7px}.view-modes button{padding-left:10px;padding-right:10px}.view-title{font-size:9px}}
/* The inspection workbench keeps the document fixed while its reference list remains readable. */
.viewer-layout{grid-template-columns:178px minmax(0,1fr) 306px;position:relative}.system-nav{padding:13px 10px 10px;gap:0}.nav-label{font-size:10px;margin-bottom:10px;padding:0 7px}.system-item{padding:8px;min-height:40px;margin:0 0 8px}.system-item div{gap:3px}.power-path{display:flex;flex-direction:column;min-height:0;flex:1;overflow:auto;scrollbar-width:thin;scrollbar-color:#d3dce8 transparent}.power-path button{position:relative;display:flex;align-items:center;gap:9px;text-align:left;flex-shrink:0;min-height:31px;padding:6px 7px;background:transparent;border-radius:5px;color:#506781}.power-path button>span{font:10px Georgia,serif;color:#8596aa;width:14px;position:relative}.power-path button:not(:last-child)>span:after{content:"";position:absolute;top:14px;left:5px;height:13px;border-left:1px solid #dce4ee}.power-path strong{font-size:10px;font-weight:500}.power-path small{margin-left:auto;color:#92a0b1;font-size:8px}.power-path button.active{background:#eaf1ff;color:#245ddd}.power-path button.active>span{color:#245ddd}.nav-aux{padding-top:9px;border-top:1px solid var(--line);margin-top:8px;display:flex;gap:3px}.nav-aux button{background:#f0f4f9;color:#667f9c;flex:1;font-size:9px;padding:7px 2px;border-radius:4px}.nav-aux button.active{color:#245ddd;background:#e8f0ff}
.inspector{padding:17px 17px 12px;gap:0}.inspector-copy{margin-top:16px}.inspector-copy h2{font-size:16px;line-height:1.5;margin-bottom:9px}.small-en{font-size:11px;margin-bottom:8px}.chapter-body{font-size:10px;line-height:1.85}.selected-part{display:flex;align-items:center;gap:9px;margin-top:15px;padding:10px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:10px;min-height:36px}.selected-part>span{font-size:9px;color:#8999ac;white-space:nowrap}.selected-part strong{font-weight:500;color:#2a5d9d;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.guide-heading{display:flex;align-items:center;gap:8px;margin:15px 0 9px;color:#506981;font-size:10px}.guide-heading small{margin-left:auto;font:10px Georgia,serif;color:#8b9eb5}.guide-heading button{display:none}.part-shortcuts{display:flex;flex-direction:column;gap:4px;min-height:0;flex:1;margin:0;overflow-y:auto;overflow-x:hidden;scrollbar-width:thin;scrollbar-color:#cad6e7 transparent;padding-right:4px;overscroll-behavior:contain}.part-shortcuts button{display:flex;align-items:flex-start;gap:9px;white-space:normal;flex-shrink:0;border:1px solid transparent;border-radius:5px;background:#f8fafc;padding:9px 8px;text-align:left;min-height:56px}.observation-number{font:10px Georgia,serif;color:#91a1b4;margin-top:2px}.part-shortcuts button>span:nth-child(2){flex:1;min-width:0}.part-shortcuts strong{display:block;font-weight:500;font-size:10px;color:#3c5572;margin-bottom:5px}.part-shortcuts small{display:block;font-size:9px;line-height:1.75;color:#7d8fa6}.part-shortcuts .icon{width:11px;height:11px;color:#9aaabe;align-self:center}.part-shortcuts button.active{background:#edf3ff;border-color:#c6d8fa}.part-shortcuts button.active strong{color:#245ddd}.detail-focus{flex-shrink:0;margin-top:7px;padding:12px 0;min-height:38px}.detail-focus:disabled{color:#9cabbc;cursor:default}.dial-wrap{flex-shrink:0;flex-direction:row;gap:11px;padding-top:10px;margin-top:0}#time-dial{width:42px;height:42px}#time-readout{font-size:16px;margin:0}.dial-wrap small{display:none}.power-box{flex-shrink:0;padding-top:8px}.power-box p{display:none}.power-box>div:first-child{font-size:9px}.power-box b{font-size:13px}.power-track{margin-top:6px}.precision-link{padding-top:8px;font-size:8px}
.explosion-control{position:absolute;left:13px;top:50%;transform:translateY(-50%);z-index:3;display:flex;align-items:center;flex-direction:column;gap:7px;width:30px;padding:9px 2px 6px;border:1px solid #dbe4ef;border-radius:8px;background:#ffffffeb;backdrop-filter:blur(10px);box-shadow:0 4px 18px #263d5b08;transition:opacity 220ms ease,border-color 220ms ease;opacity:.72}.explosion-control.engaged,.explosion-control:hover,.explosion-control:focus-within{opacity:1;border-color:#c0d2ed}.explosion-control label{font-size:9px;color:#617c9d;white-space:nowrap}.explosion-control output{font:10px Georgia,serif;color:#245ddd;font-variant-numeric:tabular-nums}.explode-track{position:relative;height:158px;display:flex;align-items:center;justify-content:center;width:22px}.explode-ticks{position:absolute;inset:5px 0 5px 1px;background:repeating-linear-gradient(to top,#b8c6da 0 1px,transparent 1px 18.5px);width:5px;pointer-events:none}.explode-track input{writing-mode:vertical-lr;direction:rtl;appearance:none;width:5px;height:148px;border:0;border-radius:4px;background:#dbe4f0;cursor:ns-resize;touch-action:none;outline-offset:8px}.explode-track input::-webkit-slider-thumb{appearance:none;width:16px;height:10px;border:2px solid white;border-radius:4px;background:#356bd0;box-shadow:0 1px 5px #244b8255;transition:box-shadow 180ms ease}.explode-track input::-webkit-slider-thumb:hover{box-shadow:0 0 0 4px #356bd022}.explode-track input::-moz-range-thumb{width:17px;height:8px;border:3px solid white;border-radius:4px;background:#356bd0}.selection-chip{position:absolute;bottom:48px;left:50%;max-width:70%;transform:translate(-50%,5px);display:flex;gap:8px;align-items:center;opacity:0;z-index:2;pointer-events:none;font-size:9px;padding:7px 11px;border:1px solid #d8e3f3;border-radius:5px;background:#fffffff0;transition:opacity 180ms ease,transform 220ms var(--ease)}.selection-chip.visible{opacity:1;transform:translate(-50%,0)}.selection-chip span{color:#8d9daf;white-space:nowrap}.selection-chip b{font-weight:500;color:#3a6aae;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.light-toggle{position:absolute;z-index:4;right:16px;bottom:18px;display:flex;align-items:center;gap:5px;background:#fffffff0;color:#597599;border:1px solid #dbe4ef;border-radius:6px;padding:8px;font-size:10px}.light-toggle .icon{width:14px;height:14px}.light-toggle[aria-expanded=true]{color:#245ddd;background:#edf3ff}.light-panel{position:absolute;bottom:60px;right:16px;width:210px;background:#ffffffed;backdrop-filter:blur(14px);border:1px solid #d9e3ef;border-radius:8px;z-index:4;padding:15px;box-shadow:0 9px 30px #243f6612;opacity:0;transform:translateY(7px) scale(.98);pointer-events:none;transition:opacity 180ms ease,transform 220ms var(--ease)}.light-panel.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}.light-panel>div{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px}.light-panel strong{font-size:11px;font-weight:500}.light-panel button{font-size:9px;color:#5077a8;background:#edf3fb;padding:4px 7px;border-radius:4px}.light-panel label{font-size:10px;display:flex;justify-content:space-between;color:#6e829c;margin-top:12px}.light-panel output{font:11px Georgia,serif;color:#3a6297}.light-panel input{width:100%;height:20px;accent-color:#356bd0;margin:6px 0 0;cursor:ew-resize}.light-panel p{font-size:9px;color:#92a1b4;margin:10px 0 0}.guide-toggle{display:none}.view-hint{max-width:65%;overflow:hidden;text-overflow:ellipsis}.top-left{left:18px}.viewport-tools{right:16px}
@media(hover:hover) and (pointer:fine){.power-path button:hover{background:#eef3fb;color:#245ddd}.nav-aux button:hover{background:#e5edfb}.part-shortcuts button:hover{transform:translateX(2px);background:#f0f5fc}}
@media(max-width:1150px) and (min-width:901px){.viewer-layout{grid-template-columns:160px minmax(0,1fr) 274px}.inspector{padding-left:14px;padding-right:14px}.power-path strong{font-size:9px}.power-path button{gap:6px}.power-path small{font-size:7px}.inspector-copy h2{font-size:15px}.light-panel{width:186px}.view-hint{display:none}}
@media(max-height:760px) and (min-width:901px){.inspector-copy{margin-top:10px}.small-en{display:none}.chapter-body{font-size:9px;line-height:1.7}.inspector-copy h2{font-size:14px;margin-bottom:6px}.selected-part{margin-top:9px;padding:7px 0;min-height:30px}.guide-heading{margin-top:10px;margin-bottom:7px}.part-shortcuts button{padding:7px;min-height:50px}.dial-wrap{display:none}.power-path button{min-height:28px;padding-top:5px;padding-bottom:5px}.nav-aux{padding-top:6px;margin-top:5px}}
@media(max-width:900px){.viewer-layout{grid-template-columns:minmax(0,1fr) 274px;grid-template-rows:52px minmax(0,1fr)}.system-nav{padding:5px 8px;flex-direction:row;align-items:stretch;gap:6px;overflow:hidden}.system-item{flex:0 0 63px;padding:5px;margin:0}.system-item>span,.system-item small{display:none}.power-path{flex-direction:row;overflow-x:auto;overflow-y:hidden;gap:4px;flex:1}.power-path button{flex-shrink:0;min-width:80px;min-height:0;padding:5px 7px;gap:5px;flex-direction:column;justify-content:center}.power-path button>span{display:none}.power-path strong{font-size:9px;white-space:nowrap}.power-path small{margin:0;font-size:7px}.nav-aux{margin:0;padding:0 0 0 6px;border-top:0;border-left:1px solid var(--line);gap:3px;flex-direction:column}.nav-aux button{padding:2px 5px;font-size:7px;white-space:nowrap}.inspector{display:flex;padding:14px}.component-note{display:none}.part-shortcuts{margin:0;display:flex;flex-direction:column}.part-shortcuts button{display:flex}.dial-wrap{display:none}.light-toggle{right:12px}.light-panel{right:12px}.explosion-control{left:10px;width:30px}.explode-track{height:130px}.explode-track input{height:120px}.selection-chip{max-width:74%}}
@media(max-width:640px){.viewer-layout{grid-template-columns:1fr;grid-template-rows:48px minmax(0,1fr) 112px}.system-nav{grid-column:1;grid-row:1;gap:4px;padding:4px}.system-item{flex-basis:48px}.system-item strong{font-size:8px}.power-path button{min-width:70px}.nav-aux button{padding:2px 4px}.inspector{grid-column:1;grid-row:3;display:grid;grid-template-columns:minmax(0,1fr) 110px;grid-template-rows:14px 25px 34px;gap:6px 10px;padding:10px 12px;overflow:hidden}.inspector-top{grid-column:1;grid-row:1;font-size:8px}.inspector-copy{grid-column:1;grid-row:2;margin:0;align-self:center}.inspector-copy h2{font-size:12px;margin:0;line-height:1.5}.chapter-body,.small-en{display:none}.selected-part{grid-column:1;grid-row:3;margin:0;padding:5px 0;min-height:0;font-size:9px;gap:6px}.selected-part>span{font-size:8px}.guide-heading,.part-shortcuts{display:none}.detail-focus{grid-column:2;grid-row:3;padding:7px 0;min-height:0;margin:0;border:0;font-size:9px}.power-box{grid-column:2;grid-row:1/3;align-self:center;margin:0;padding:0}.power-box>div:first-child{font-size:8px}.power-box b{font-size:12px}.precision-link,.dial-wrap{display:none}.guide-toggle{position:absolute;display:flex;align-items:center;gap:4px;top:15px;left:50%;transform:translateX(-50%);z-index:4;background:#ffffffeb;border:1px solid #dae4f2;border-radius:5px;color:#5578aa;font-size:9px;padding:7px 8px;white-space:nowrap}.guide-toggle .icon{width:12px;height:12px}.guide-toggle:active{transform:translateX(-50%) scale(.96)}.guide-open .inspector{position:absolute;inset:48px 0 0;z-index:7;display:flex;background:#fffffffa;padding:17px;border-top:0;animation:reveal 220ms var(--ease)}.guide-open .inspector-top,.guide-open .inspector-copy,.guide-open .selected-part,.guide-open .power-box{display:none}.guide-open .guide-heading{display:flex;margin:0 0 12px;font-size:12px}.guide-open .guide-heading button{display:grid;place-items:center;width:28px;height:28px;background:#edf2fa;border-radius:5px;color:#617a9b}.guide-open .guide-heading small{margin-left:auto}.guide-open .part-shortcuts{display:flex;flex:1;min-height:0;overflow-y:auto;gap:5px}.guide-open .part-shortcuts button{display:flex;padding:11px;flex:none;min-height:62px;font-size:11px}.guide-open .part-shortcuts strong{font-size:11px}.guide-open .part-shortcuts small{font-size:10px}.guide-open .detail-focus{display:flex;padding:14px 0;font-size:11px}.explosion-control{left:7px;width:28px;padding:8px 1px 6px;gap:5px}.explosion-control label{font-size:8px}.explosion-control output{font-size:10px}.explode-track{height:112px}.explode-track input{height:102px}.top-left{top:14px;left:12px}.top-left b{font-size:22px}.top-left em{display:none}.top-right{top:17px;right:12px}.light-toggle{right:10px;bottom:12px;padding:8px;font-size:9px}.light-panel{right:10px;bottom:52px;width:190px;padding:13px}.selection-chip{bottom:45px;font-size:8px;gap:5px;padding:6px 8px;max-width:70%}.view-hint{display:none}.scale-bar{bottom:16px;left:12px}.viewport-tools{right:10px}.render-note{display:none}}
@media(prefers-reduced-motion:reduce){.guide-open .inspector{animation:none}.selection-chip,.light-panel,.explosion-control{transition:none}}
.selection-chip button{pointer-events:auto;display:none;align-items:center;gap:5px;background:#edf3ff;border-left:1px solid #d1dff3;color:#3566b0;font-size:9px;padding:5px 0 5px 9px;white-space:nowrap}.selection-chip button.visible{display:flex}.selection-chip button .icon{width:12px;height:12px}.selection-chip.isolated:before{content:'局部观察';color:#4773b2;border-right:1px solid #dae5f5;padding-right:8px;white-space:nowrap}.selection-chip.isolated>span{display:none}.selection-chip.isolated{pointer-events:auto;max-width:90%}@media(max-width:640px){.selection-chip button{font-size:8px}.selection-chip.isolated{gap:5px}.selection-chip.isolated:before{padding-right:5px}}
.guide-open .inspector{grid-area:auto}.system-nav>.system-item{flex:0 0 auto}@media(max-width:900px){.system-nav>.system-item{flex:0 0 64px}}@media(max-width:640px){.system-nav>.system-item{flex-basis:50px}}
/* Readable labels and a single clear row hierarchy throughout the workbench. */
@media(min-width:1151px){.viewer-layout{grid-template-columns:192px minmax(0,1fr) 320px}}
.nav-label{font-size:11px}.power-path strong{font-size:12px}.power-path small{font-size:9px}.power-path button{gap:8px;min-height:32px}.power-path button>span{font-size:11px;width:16px}.nav-aux button{font-size:10px}.inspector-copy h2{font-size:18px}.chapter-body{font-size:11px;line-height:1.85;color:#6b7d94}.selected-part{font-size:11px}.selected-part>span{font-size:10px}.guide-heading{font-size:11px}.part-shortcuts button{padding:10px 9px;min-height:69px;background:#f8fafc;border-bottom-color:#eaf0f7}.part-shortcuts strong{font-size:12px;margin-bottom:5px}.part-shortcuts small{font-size:11px;line-height:1.65}.observation-number{font-size:11px;min-width:15px}.detail-focus{font-size:11px}.explode-track input{width:22px;background:linear-gradient(to right,transparent 9px,#dbe4f0 9px,#dbe4f0 12px,transparent 12px)}.light-panel label{font-size:11px}.light-panel p{font-size:10px}.light-panel strong{font-size:12px}
@media(max-width:1150px) and (min-width:901px){.power-path strong{font-size:11px}.power-path small{font-size:8px}.power-path button{gap:6px}.inspector-copy h2{font-size:16px}.chapter-body{font-size:10px}.part-shortcuts small{font-size:10px}}
@media(max-width:900px){.power-path button{min-height:0}.power-path strong{font-size:10px}.power-path small{font-size:8px}.power-path button>span{display:none}.nav-aux button{font-size:8px}}
@media(max-width:640px){.power-path strong{font-size:9px}.power-path small{font-size:7px}.nav-aux button{font-size:7px}.inspector-copy h2{font-size:12px}.selected-part{font-size:9px}.selected-part>span{font-size:8px}.detail-focus{font-size:9px}.guide-open .part-shortcuts strong{font-size:12px}.guide-open .part-shortcuts small{font-size:11px}.guide-open .inspector{background:#fff}.viewport-tools button{width:28px;height:28px}.selection-chip.isolated{bottom:48px}}
@media(max-height:760px) and (min-width:901px){.power-path button{min-height:28px}.power-path strong{font-size:11px}.inspector-copy h2{font-size:16px}.chapter-body{font-size:10px}.part-shortcuts button{min-height:66px}.part-shortcuts small{font-size:10px}}
.path-branch{font-size:9px;color:#8d9caf;padding:9px 6px 7px;margin:4px 0 3px;border-top:1px solid #e1e8f1;white-space:nowrap}.power-path button[data-stop=balance]>span:after{display:none}@media(max-width:900px){.path-branch{align-self:center;border-top:0;border-left:1px solid #dbe4ef;writing-mode:vertical-rl;font-size:8px;max-height:37px;white-space:normal;padding:0 5px;margin:0}.power-path{scrollbar-width:thin}}@media(max-height:760px) and (min-width:901px){.path-branch{font-size:8px;padding-top:6px;padding-bottom:5px;margin-top:2px}}
@media(max-width:640px){.guide-closing .inspector{animation:guide-exit 180ms var(--ease) both}@keyframes guide-exit{to{opacity:0;transform:translateY(5px)}}}

.explode-reset{display:grid;place-items:center;width:22px;height:22px;border-radius:4px;background:transparent;color:#7991af}.explode-reset .icon{width:12px;height:12px}.explode-reset:hover{background:#e9f0fc;color:#245ddd}.explode-ticks{left:0;width:3px}.explosion-control label{font-size:9px}

.selected-tip{font-size:10px;line-height:1.75;color:#7085a1;margin:7px 0 4px;transition:opacity 160ms ease;flex:0 0 auto}.selected-tip:empty{display:none}@media(max-width:900px){.selected-tip{display:none}.guide-open .selected-tip{display:block;font-size:11px}}

.official-list-toggle{font-size:10px;color:#54749e;background:#f0f5fc;border:1px solid #dfe8f5;border-radius:4px;padding:4px 6px;white-space:nowrap;transition:background 180ms ease,transform 180ms ease}.official-list-toggle:hover{background:#e6effe;transform:scale(1.03)}.official-list-toggle:active{transform:scale(.97)}.official-list .observation-number{min-width:32px;display:flex;flex-direction:column;gap:3px}.official-list .observation-number i{font-size:8px;font-style:normal;color:#96a4b6}.guide-heading .official-list-toggle{margin-left:auto}.guide-heading>small{margin-left:7px}

.guide-heading .official-list-toggle{display:inline-flex;align-items:center;justify-content:center;width:auto;height:auto;min-height:25px;flex-shrink:0;padding:4px 6px}.guide-open .guide-heading .official-list-toggle{width:auto;height:28px;padding:4px 7px}

.crown-controls{display:flex;align-items:center;gap:8px}.crown-position{display:flex;padding:3px;border-radius:6px;background:#f1f4f7;border:1px solid #e1e7ef}.crown-position button{padding:7px 9px;background:transparent;border-radius:4px;color:#7b899b;white-space:nowrap}.crown-position button.active{background:#fff;color:#255ddc;box-shadow:0 1px 4px #172b4910}.crown-controls button:disabled{cursor:default;opacity:.55}.setting-reverse{background:#f5f8fc;color:#35577f;max-width:0;opacity:0;padding:8px 0;overflow:hidden;white-space:nowrap;border-radius:5px;transform:scale(.95);transition:max-width 220ms var(--ease),opacity 180ms ease,padding 220ms var(--ease),transform 180ms var(--ease)}.setting-reverse.available{max-width:110px;opacity:1;padding:8px 10px;transform:scale(1)}.setting-reverse small{font-size:9px;color:#8292a8;margin-left:3px}.crown-position button:hover:not(:disabled){background:#e7efff}.crown-position button.active:hover{background:#fff}.crown-controls .wind-button{white-space:nowrap}
@media(max-width:640px){.observatory{grid-template-rows:41px minmax(0,1fr) 98px}.transport-bar{flex-wrap:wrap;justify-content:center;align-content:center;gap:7px}.playback{justify-content:center;width:100%}.crown-controls{justify-content:center;width:100%;gap:5px}.crown-position button{font-size:10px;padding:6px 10px}.crown-controls .wind-button{font-size:10px;padding:7px 10px}.setting-reverse{font-size:10px}.setting-reverse.available{padding:7px 10px}.toast{bottom:111px}}

/* Mobile top bar: keep the three side buttons on one row and readable, without clipping. */
@media(max-width:900px){
  .system-nav{overflow:hidden;min-width:0}
  .nav-aux{flex-direction:row;align-items:stretch;padding:0 0 0 6px}
  .nav-aux button{flex:1;display:grid;place-items:center;padding:0 5px;font-size:8px;min-height:0}
  .path-branch{writing-mode:horizontal-tb;max-height:none;align-self:center;white-space:nowrap;border-top:0;border-left:1px solid #dbe4ef;padding:0 7px;font-size:8px;line-height:1.3}
}
@media(max-width:640px){
  .nav-aux button{font-size:8px;padding:0 5px}
  .path-branch{padding:0 6px}
}

/* Focus mode: selected part stays readable, the rest fades by an adjustable amount. */
.inspector:not(.has-selection) .selected-part{display:none}
.focus-dim{display:none;margin:4px 0 0}
.inspector.has-selection .focus-dim{display:block}
.focus-dim label{display:flex;align-items:baseline;justify-content:space-between;gap:8px;font-size:9px;color:#7d8ea4;letter-spacing:.02em}
.focus-dim output{font:10px ui-monospace,SFMono-Regular,Menlo,monospace;color:#b9bcc2}
.focus-dim input[type=range]{width:100%;height:18px;margin:1px 0 0;accent-color:#b9bcc2;cursor:pointer}
.focus-dim p{margin:2px 0 0;font-size:8px;color:#9aa8b8;letter-spacing:0}
.inspector.has-selection .selected-part{display:flex;align-items:baseline;gap:10px;margin:14px 0 0;padding:2px 0 8px;border-top:0;border-bottom:1px solid var(--line);min-height:0}
.inspector.has-selection .selected-part>span{font-size:9px;color:#8a99ac;white-space:nowrap}
.inspector.has-selection .selected-part strong{font-size:19px;font-weight:500;line-height:1.3;color:#17222e;white-space:normal;overflow:visible;text-overflow:clip}
.inspector.has-selection .inspector-copy{margin-top:10px}
.inspector.has-selection .inspector-copy h2{font-size:12px;font-weight:400;line-height:1.7;color:#8291a4;margin:0 0 6px}
.inspector.has-selection .small-en{font-size:10px;margin-bottom:5px}
.inspector.has-selection .chapter-body{font-size:10px;line-height:1.9;color:#979ba1}
@media(max-width:900px){.focus-dim{display:none!important}.inspector.has-selection .selected-part strong{font-size:12px}}
@media(max-width:640px){.inspector.has-selection .selected-part strong{font-size:11px}.inspector.has-selection .inspector-copy{margin-top:4px}.inspector.has-selection .inspector-copy h2{font-size:10px}}

/* Document reader: markdown files open inside the page instead of a raw file tab. */
.doc-backdrop{position:fixed;inset:0;background:#1c2d4433;backdrop-filter:blur(3px);opacity:0;pointer-events:none;transition:opacity 240ms ease;z-index:40}
.doc-panel{position:fixed;left:50%;top:6vh;bottom:6vh;width:min(780px,calc(100vw - 32px));transform:translate(-50%,12px);display:flex;flex-direction:column;background:#fff;border-radius:10px;box-shadow:0 30px 90px #1c304640;opacity:0;pointer-events:none;transition:opacity 220ms ease,transform 260ms var(--ease);z-index:41;overflow:hidden}
.doc-open .doc-backdrop{opacity:1;pointer-events:auto}
.doc-open .doc-panel{opacity:1;transform:translate(-50%,0);pointer-events:auto}
.doc-head{display:flex;align-items:center;gap:12px;padding:16px 22px 14px;border-bottom:1px solid var(--line);flex:0 0 auto}
.doc-head .kicker{margin:0;font-size:10px;color:#8b98a9}
.doc-head h2{font:18px "Songti SC",SimSun,serif;font-weight:400;margin:0;color:#17222e}
.doc-head .close-button{position:static;margin-left:auto;flex:0 0 auto}
.doc-body{overflow-y:auto;padding:16px 24px 32px;font-size:12px;line-height:1.95;color:#4d6076;overscroll-behavior:contain}
.doc-body h1{font:20px "Songti SC",SimSun,serif;font-weight:400;color:#17222e;margin:0 0 14px}
.doc-body h2{font-size:14px;font-weight:500;color:#24374d;margin:24px 0 10px;padding-top:14px;border-top:1px solid #edf0f4}
.doc-body h3{font-size:12px;font-weight:600;margin:18px 0 8px;color:#31465e}
.doc-body p{margin:0 0 10px}
.doc-body table{width:100%;border-collapse:collapse;font-size:11px;line-height:1.75;margin:10px 0 16px;table-layout:fixed}
.doc-body th{text-align:left;font-weight:500;color:#354b63;background:#f7f9fc;border-bottom:1px solid #dfe6ef;padding:8px 9px}
.doc-body td{border-bottom:1px solid #eef2f7;padding:8px 9px;vertical-align:top;word-break:break-word}
.doc-body th:first-child,.doc-body td:first-child{width:64px}
.doc-body ul,.doc-body ol{margin:0 0 12px;padding-left:22px}
.doc-body li{margin:0 0 5px}
.doc-body code{font:11px ui-monospace,SFMono-Regular,Menlo,monospace;background:#f2f5fa;color:#3c5573;padding:1px 5px;border-radius:3px;word-break:break-all}
.doc-body pre{background:#f6f8fb;padding:14px;border-radius:6px;overflow:auto;margin:0 0 14px}
.doc-body pre code{background:none;padding:0}
.doc-body a{color:#2d63b7;text-decoration:underline;text-underline-offset:2px}
.doc-body blockquote{margin:0 0 12px;padding:8px 12px;border-left:2px solid #dbe4f0;background:#fafbfd;color:#64788f}
.doc-body hr{border:0;border-top:1px solid #edf0f4;margin:20px 0}
.doc-loading{color:#8797aa}
@media(max-width:640px){.doc-panel{top:3vh;bottom:3vh;width:calc(100vw - 20px)}.doc-body{padding:14px 15px 26px;font-size:11px}.doc-body table{font-size:10px}.doc-body th:first-child,.doc-body td:first-child{width:48px}}

/* Mobile inspector: term name first, artistic caption under it. */
@media(max-width:640px){
  .inspector.has-selection .selected-part{grid-column:1;grid-row:2;margin:0;padding:2px 0 0;border-bottom:0;min-height:0;align-self:center}
  .inspector.has-selection .selected-part>span{font-size:8px}
  .inspector.has-selection .selected-part strong{font-size:12px}
  .inspector.has-selection .inspector-copy{grid-column:1;grid-row:3;margin:0;align-self:start}
  .inspector.has-selection .inspector-copy h2{font-size:10px;line-height:1.4;color:#8291a4;margin:0}
}

/* Header tools: language and theme switches. */
.header-tools{display:flex;align-items:center;gap:6px;margin-right:4px}
.header-toggle{width:30px;height:30px;display:grid;place-items:center;border-radius:50%;background:#f1f4f8;color:#5e7188;font-size:10px;font-weight:600;letter-spacing:.02em;transition:background 160ms ease,color 160ms ease,transform 160ms ease}
.header-toggle:hover{background:#e7edf5;color:#2d5f9e}
.header-toggle:active{transform:scale(.94)}
.header-toggle .icon{width:15px;height:15px}
body.dark .header-toggle{background:#2c2c2e;color:#b6b6b6}
body.dark .header-toggle:hover{background:#2f2f2f;color:#e6e7ea}
@media(max-width:640px){.header-tools{gap:4px;margin-right:0}.header-toggle{width:26px;height:26px}.header-toggle .icon{width:13px;height:13px}}

/* Dark theme: the chrome turns deep navy, the movement keeps its metal tones. */
body.dark{--white:#1b1b1e;--paper:#151517;--ink:#e9eaec;--muted:#a3a3a3;--line:#333336;--blue:#bcbcbc;background:#151517;color:#e6e7ea}
body.dark .header{background:#151517;border-bottom-color:#2e2e31}
body.dark .wordmark{color:#e9eaec}
body.dark .wordmark-en{color:#8a8a8a}
body.dark .header-specs span{color:#9a9a9a}
body.dark .source-link{color:#b6b6b6}
body.dark .source-link:hover{color:#e6e7ea}
body.dark .observatory{background:#1b1b1e;border-color:#333336;box-shadow:0 24px 70px #00000055}
body.dark .view-header{background:#1b1b1e;border-bottom-color:#333336}
body.dark .view-title{color:#aeaeae}
body.dark .view-code{color:#7b7b7b}
body.dark .live-dot{background:#cbcbcb}
body.dark .side-switch,body.dark .view-modes{background:#262628;border-color:#333336}
body.dark .side-switch button,body.dark .view-modes button{color:#a3a3a3}
body.dark .side-switch button.active,body.dark .view-modes button.active{color:#e6e7ea;background:#2c2c2e}
body.dark #mode-thumb{background:#2c2c2e}
body.dark .system-nav{background:#1b1b1e;border-color:#333336}
body.dark .nav-label{color:#8d8d8d}
body.dark .system-item{color:#c5c5c5}
body.dark .system-item small,body.dark .power-path small{color:#7f7f7f}
body.dark .system-item.active{background:#2c2c2e;color:#e6e7ea}
body.dark .system-item:hover{background:#262628}
body.dark .power-path button{color:#b6b6b6}
body.dark .power-path button.active{background:#2c2c2e;color:#e6e7ea}
body.dark .power-path button:not(:last-child)>span:after{border-color:#3a3a3d}
body.dark .nav-aux{border-color:#333336}
body.dark .nav-aux button{background:#262628;color:#a3a3a3}
body.dark .nav-aux button.active{background:#2c2c2e;color:#e6e7ea}
body.dark .viewport{background:#151517}
body.dark .viewer-corner{color:#c2c2c2}
body.dark .viewer-corner b{color:#e9eaec}
body.dark .viewer-corner em,body.dark .viewer-corner small{color:#7f7f7f}
body.dark .explosion-control{background:#232326e6;border-color:#3a3a3d;color:#c5c5c5}
body.dark .explode-track{background:#262628}
body.dark .explosion-control label,body.dark .explosion-control output{color:#b5b5b5}
body.dark .viewport-tools{background:#232326e6;border-color:#3a3a3d}
body.dark .viewport-tools button{color:#b6b6b6}
body.dark .viewport-tools button:hover{background:#2c2c2e;color:#e6e7ea}
body.dark .viewport-tools span{background:#3a3a3d}
body.dark .light-toggle,body.dark .guide-toggle{background:#232326e6;border-color:#3a3a3d;color:#c5c5c5}
body.dark .light-panel{background:#232326;border-color:#3a3a3d;color:#c5c5c5}
body.dark .light-panel strong,body.dark .light-panel label{color:#e4e5e8}
body.dark .light-panel p{color:#8d8d8d}
body.dark .light-panel button{color:#e6e7ea}
body.dark .selection-chip{background:#232326e6;border-color:#3a3a3d;color:#c5c5c5}
body.dark .selection-chip b{color:#e9eaec}
body.dark .selection-chip button{color:#e6e7ea}
body.dark .scale-bar{color:#9a9a9a}
body.dark .scale-bar>span{background:#8d8d8d}
body.dark .view-hint{color:#8a8a8a}
body.dark .render-note{color:#7b7b7b}
body.dark .inspector{background:#1b1b1e;border-color:#333336;color:#cbcbcb}
body.dark .inspector-top,body.dark .status{color:#8d8d8d}
body.dark .selected-part{color:#9a9a9a;border-color:#333336}
body.dark .selected-part strong{color:#e6e7ea}
body.dark .small-en{color:#8d8d8d}
body.dark .inspector-copy h2{color:#e9eaec}
body.dark .chapter-body{color:#a3a3a3}
body.dark .selected-tip{color:#9a9a9a}
body.dark .focus-dim label{color:#9a9a9a}
body.dark .focus-dim output{color:#e6e7ea}
body.dark .focus-dim p{color:#717171}
body.dark .guide-heading{color:#9a9a9a}
body.dark .official-list-toggle{background:#2c2c2e;border-color:#3a3a3d;color:#e6e7ea}
body.dark .part-shortcuts button{background:#1c1c1c;border-color:#333336;color:#cbcbcb}
body.dark .part-shortcuts button:hover{background:#2c2c2e}
body.dark .part-shortcuts button.active{background:#2c2c2e;color:#e6e7ea}
body.dark .part-shortcuts strong{color:#e6e7ea}
body.dark .part-shortcuts small{color:#8d8d8d}
body.dark .observation-number{color:#7b7b7b}
body.dark .part-shortcuts .icon{color:#a3a3a3}
body.dark .detail-focus{color:#e6e7ea;border-color:#3a3a3d}
body.dark .dial-wrap small{color:#8d8d8d}
body.dark #time-readout{color:#e6e7ea}
body.dark #time-dial circle{fill:#1b1b1e;stroke:#333336}
body.dark #time-dial #hour,body.dark #time-dial #minute{fill:#e9eaec}
body.dark #time-dial #second{stroke:#bcbcbc}
body.dark #time-dial>g>circle{fill:#bcbcbc}
body.dark .power-box>div:first-child{color:#9a9a9a}
body.dark .power-box b{color:#e6e7ea}
body.dark .power-box small{color:#8d8d8d}
body.dark .power-track{background:#2c2c2e}
body.dark .power-box p{color:#7f7f7f}
body.dark .precision-link{color:#9d9d9d}
body.dark .transport-bar{background:#18181a;border-top-color:#333336}
body.dark .play-button{background:#2c2c2e;color:#e9eaec}
body.dark .play-button:hover{background:#3b3b3b}
body.dark .step-button,body.dark .speed-control button,body.dark .crown-position button,body.dark .setting-reverse{background:#2c2c2e;color:#c5c5c5;border-color:#333336}
body.dark .speed-control button.active,body.dark .crown-position button.active{background:#2c2c2e;color:#e6e7ea}
body.dark .wind-button{background:#2c2c2e;color:#d1d1d1;border-color:#333336}
body.dark .wind-button:hover{background:#2c2c2e;border-color:#414141}
body.dark .beat-readout{color:#9d9d9d}
body.dark .beat-line{background:#3a3a3d}
body.dark .toast{background:#2c2c2eee;color:#e9eaec}
body.dark .loader{background:#151517}
body.dark .loader>span{border-color:#3a3a3d;border-top-color:#bcbcbc}
body.dark .loader p{color:#9a9a9a}
body.dark .source-drawer{background:#1b1b1e;color:#cbcbcb;box-shadow:-10px 0 50px #00000066}
body.dark .source-drawer h2{color:#e9eaec}
body.dark .source-drawer>p,body.dark .source-drawer dd,body.dark .source-drawer dt{color:#a3a3a3}
body.dark .reference-link,body.dark .prompt-link,body.dark .source-drawer p a{color:#e6e7ea}
body.dark .source-drawer dl>div{border-color:#333336}
body.dark .close-button{background:#2c2c2e;color:#ababab}
body.dark .kicker{color:#8a8a8a}
body.dark .drawer-backdrop{background:#00000080}
body.dark .doc-backdrop{background:#00000090}
body.dark .doc-panel{background:#1b1b1e;box-shadow:0 30px 90px #00000080}
body.dark .doc-head{border-color:#333336}
body.dark .doc-head h2,body.dark .doc-body h1,body.dark .doc-body h2,body.dark .doc-body h3{color:#eaeaea}
body.dark .doc-body{color:#b5b5b5}
body.dark .doc-body h2{border-color:#333336}
body.dark .doc-body th{background:#262628;color:#cbcbcb;border-color:#333336}
body.dark .doc-body td{border-color:#2e2e31}
body.dark .doc-body code{background:#262628;color:#d5d5d5}
body.dark .doc-body pre{background:#262628}
body.dark .doc-body blockquote{background:#1c1c1c;border-color:#333336;color:#9d9d9d}
body.dark .doc-body hr{border-color:#333336}
body.dark .doc-loading{color:#8d8d8d}

/* Dark theme containers that keep a light surface by default. */
body.dark .crown-position{background:#2c2c2e;border-color:#333336}
body.dark .crown-position button{color:#adadad}
body.dark .crown-position button.active{background:#2c2c2e;color:#e6e7ea;box-shadow:none}
body.dark .crown-position button:hover:not(:disabled){background:#2c2c2e}
body.dark .setting-reverse{background:#2c2c2e;color:#bcbcbc;border:1px solid #333336}
body.dark .setting-reverse small{color:#8d8d8d}
body.dark .explode-track{background:#262628}
body.dark .explode-ticks{background-image:linear-gradient(#8d8d8d 1px,transparent 1px)}
body.dark .part-shortcuts::-webkit-scrollbar-thumb{background:#3a3a3d}
body.dark .power-path::-webkit-scrollbar-thumb{background:#3a3a3d}
body.dark .header{border-bottom-color:#2e2e31}
body.dark .observatory .viewer-layout{border-color:#333336}
body.dark .view-hint .icon,body.dark .render-note .icon{color:#8a8a8a}
body.dark .source-drawer .reference-link,body.dark .source-drawer .prompt-link{border-color:#333336}
body.dark .doc-body a{color:#e6e7ea}

/* English labels are longer than the Chinese originals: keep the transport bar on one line. */
html[lang="en"] .crown-position button{padding:6px 7px;font-size:10px}
html[lang="en"] .crown-controls{gap:6px}
html[lang="en"] .wind-button{font-size:10px;padding:8px 9px}
html[lang="en"] .setting-reverse.available{max-width:128px;padding:7px 8px;font-size:10px}
html[lang="en"] .transport-bar{gap:12px;padding:0 14px}
html[lang="en"] .speed-control button{padding:7px 5px}
html[lang="en"] .part-shortcuts strong{font-size:11px}
html[lang="en"] .observation-number{font-size:9px}

/* Keep the single-screen layout clamped on phones now that English labels are longer. */
.view-header,.viewer-layout,.observatory,main{min-width:0}
.view-header{overflow:hidden}
.viewer-layout{overflow:hidden}
@media(max-width:900px){
 html[lang="en"] .view-header{min-width:0}
 html[lang="en"] .view-switches{gap:8px}
 html[lang="en"] .view-modes button{padding:5px 9px;font-size:9px}
 html[lang="en"] .side-switch button{font-size:9px}
 html[lang="en"] .system-nav{min-width:0}
 html[lang="en"] .nav-aux{max-width:150px}
 html[lang="en"] .nav-aux button{white-space:normal;line-height:1.2}
 html[lang="en"] .power-path strong{white-space:normal;line-height:1.2}
}
@media(max-width:640px){
 html[lang="en"] .view-title{font-size:8px}
 html[lang="en"] .view-code{display:none}
 html[lang="en"] .view-switches{gap:4px}
 html[lang="en"] .side-switch{padding-right:4px;gap:0}
 html[lang="en"] .side-switch button{padding:4px 5px;font-size:8px}
 html[lang="en"] .view-modes button{padding:4px 5px;font-size:8px}
 html[lang="en"] .system-item{flex:0 0 54px}
 html[lang="en"] .system-item strong{font-size:8px}
 html[lang="en"] .nav-aux{flex:0 0 88px;max-width:88px;gap:2px}
 html[lang="en"] .nav-aux button{white-space:normal;font-size:7px;line-height:1.15;padding:1px 2px}
 html[lang="en"] .path-branch{white-space:nowrap;font-size:7px;padding:0 5px}
 html[lang="en"] .power-path button{min-width:76px}
 html[lang="en"] .power-path strong{white-space:normal;font-size:8px;line-height:1.2;text-align:left}
 html[lang="en"] .power-path small{font-size:7px}
 html[lang="en"] .crown-position button{font-size:8px;padding:5px 5px}
 html[lang="en"] .wind-button{font-size:8px;padding:7px 7px}
 html[lang="en"] .inspector{grid-template-columns:minmax(0,1fr) 96px}
 html[lang="en"] .detail-focus{font-size:8px;white-space:normal;line-height:1.25;text-align:center}
 html[lang="en"] .power-box>div:first-child{font-size:7px}
 html[lang="en"] .power-box b{font-size:10px}
 html[lang="en"] .power-box small{display:none}
 html[lang="en"] .guide-toggle{font-size:8px;padding:6px 7px}
 html[lang="en"] .selection-chip{font-size:7px}
 html[lang="en"] .light-toggle{font-size:8px;padding:7px}
}

/* Closed overlays must not keep a live backdrop filter (mobile Chrome otherwise leaves a blurred fringe). */
.drawer-backdrop,.doc-backdrop{visibility:hidden;backdrop-filter:none;transition:opacity 240ms ease,visibility 0s 240ms}
.drawer-open .drawer-backdrop,.doc-open .doc-backdrop{visibility:visible;backdrop-filter:blur(3px);transition:opacity 240ms ease,visibility 0s 0s}
body.dark .guide-heading button{background:#2c2c2e;color:#a3a3a3}
body.dark .guide-heading button:hover{background:#333336}
body.dark .doc-head .close-button{background:#2c2c2e;color:#a3a3a3}
body.dark .guide-open .inspector{background:#1b1b1ee6}

/* Focus dimming reset: desktop next to the slider, mobile inside the selected-part row. */
.focus-dim{position:relative}
.focus-dim label{padding-right:46px}
.focus-reset{position:absolute;right:0;top:-2px;font-size:9px;color:#3a66b0;background:#edf3fe;border:1px solid #d9e4f6;border-radius:4px;padding:3px 8px;cursor:pointer}
.focus-reset:hover{background:#e2ecfc}
.focus-reset:active{transform:scale(.96)}
.focus-clear{display:none}
body.dark .focus-reset{background:#2c2c2e;border-color:#3a3a3d;color:#e6e7ea}
body.dark .focus-reset:hover{background:#333336}
body.dark .focus-clear{background:#2c2c2e;border:1px solid #3a3a3d;color:#e6e7ea}
@media(max-width:900px){
 .focus-clear{display:inline-grid;place-items:center;margin-left:auto;flex:0 0 auto;font-size:8px;line-height:1;color:#3a66b0;background:#edf3fe;border:1px solid #d9e4f6;border-radius:4px;padding:4px 7px;cursor:pointer}
}

/* Focus mode only (entered from the observation lists / zoom button), not from canvas taps. */
.focus-dim{display:none}
.inspector.focus-mode .focus-dim{display:block}
.focus-clear{display:none!important}
.focus-reset{background:#245ddd;border-color:#245ddd;color:#fff;border-radius:10px;padding:5px 10px;font-size:10px;box-shadow:0 2px 8px #245ddd33}
.focus-reset:hover{background:#1f52c4;border-color:#1f52c4}
body.dark .focus-reset{background:#e6e7ea;border-color:#e6e7ea;color:#fff}
@media(max-width:900px){
 .inspector.focus-mode .focus-clear{display:inline-grid!important;place-items:center;margin-left:auto;flex:0 0 auto;font-size:8px;line-height:1;background:#245ddd;border:1px solid #245ddd;color:#fff;border-radius:9px;padding:5px 8px;cursor:pointer}
 body.dark .inspector.focus-mode .focus-clear{background:#e6e7ea;border-color:#e6e7ea;color:#fff}
}

/* Contrast fixes: the focus-mode name must stay readable on the dark inspector. */
body.dark .inspector.has-selection .selected-part strong{color:#e9eaec}
body.dark .inspector.has-selection .selected-part>span{color:#9f9f9f}
body.dark .inspector.has-selection .selected-tip{color:#a3a3a3}
body.dark .inspector.has-selection .inspector-copy h2{color:#a3a3a3}
body.dark .inspector.has-selection .chapter-body{color:#9d9d9d}
body.dark .inspector.has-selection .focus-dim label{color:#a3a3a3}
body.dark .inspector.has-selection .focus-dim p{color:#7f7f7f}

/* iOS-style rounded surfaces and frosted glass. */
:root{--ios-r-xl:22px;--ios-r-lg:16px;--ios-r-md:12px;--ios-r-sm:9px}
body{background:radial-gradient(1200px 640px at 18% -12%,#f8fafc,#eef1f5 62%)}
body.dark{background:radial-gradient(1200px 640px at 18% -12%,#1b1b1e,#151517 64%)}
.header{background:rgba(255,255,255,.72);backdrop-filter:blur(20px) saturate(1.6);-webkit-backdrop-filter:blur(20px) saturate(1.6);border-bottom:1px solid rgba(20,30,50,.06)}
body.dark .header{background:rgba(21,21,23,.72);border-bottom-color:rgba(255,255,255,.06)}
.observatory{border-radius:var(--ios-r-xl);overflow:hidden;border:1px solid rgba(20,30,50,.07);box-shadow:0 18px 50px rgba(20,30,50,.08);background:rgba(255,255,255,.55);backdrop-filter:blur(24px) saturate(1.5);-webkit-backdrop-filter:blur(24px) saturate(1.5)}
body.dark .observatory{background:rgba(27,27,30,.62);border-color:rgba(255,255,255,.06);box-shadow:0 18px 50px rgba(0,0,0,.5)}
.inspector{background:rgba(255,255,255,.55);backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4)}
body.dark .inspector{background:rgba(27,27,30,.55)}
.transport-bar{background:rgba(255,255,255,.74);backdrop-filter:blur(20px) saturate(1.5);-webkit-backdrop-filter:blur(20px) saturate(1.5);border-radius:0 0 var(--ios-r-xl) var(--ios-r-xl)}
body.dark .transport-bar{background:rgba(21,21,23,.74)}
.viewport-tools,.explosion-control,.selection-chip,.light-toggle,.guide-toggle,.light-panel{border-radius:var(--ios-r-lg);backdrop-filter:blur(18px) saturate(1.6);-webkit-backdrop-filter:blur(18px) saturate(1.6)}
.view-modes,.side-switch{border-radius:var(--ios-r-md)}
.view-modes button,.side-switch button{border-radius:8px}
#mode-thumb{border-radius:8px}
.system-item{border-radius:10px}
.nav-aux button{border-radius:8px}
.part-shortcuts button{border-radius:var(--ios-r-md)}
.play-button{border-radius:50%}
.speed-control button,.step-button,.setting-reverse,.wind-button,.crown-position{border-radius:10px}
.crown-position button{border-radius:8px}
#toast{border-radius:12px}
.source-drawer{border-radius:var(--ios-r-xl) 0 0 var(--ios-r-xl)}
.doc-panel{border-radius:var(--ios-r-xl)}
.doc-head{border-radius:var(--ios-r-xl) var(--ios-r-xl) 0 0}
.header-toggle{border-radius:50%}
.focus-reset,.official-list-toggle,.detail-focus{border-radius:10px}
@media(max-width:640px){.observatory{border-radius:16px}.transport-bar{border-radius:0 0 16px 16px}.source-drawer{border-radius:16px 0 0 16px}}

/* The dim slider only belongs to focus mode. */
.inspector:not(.focus-mode) .focus-dim{display:none!important}

/* Left navigation and right inspector become separate rounded cards. */
@media(min-width:901px){
 .viewer-layout{grid-template-columns:190px minmax(0,1fr) 300px;gap:10px;padding:10px 12px 12px}
 .system-nav{border:1px solid rgba(20,30,50,.08);border-radius:18px;background:rgba(255,255,255,.66);backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4);padding:14px 10px 10px}
 .viewport{border-radius:18px;border:1px solid rgba(20,30,50,.08)}
 .inspector{border:1px solid rgba(20,30,50,.08);border-radius:18px;background:rgba(255,255,255,.6);backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4);padding:18px 20px 14px}
 body.dark .system-nav,body.dark .inspector{background:rgba(27,27,30,.7);border-color:rgba(255,255,255,.07)}
 body.dark .viewport{border-color:rgba(255,255,255,.06)}
}
@media(max-width:900px){
 .viewer-layout{gap:8px;padding:8px}
 .system-nav{border:1px solid rgba(20,30,50,.08);border-radius:14px;background:rgba(255,255,255,.66);backdrop-filter:blur(16px) saturate(1.3);-webkit-backdrop-filter:blur(16px) saturate(1.3);padding:3px 5px}
 .viewport{border-radius:14px;border:1px solid rgba(20,30,50,.08)}
 .inspector{border:1px solid rgba(20,30,50,.08);border-radius:14px;background:rgba(255,255,255,.66);backdrop-filter:blur(16px) saturate(1.3);-webkit-backdrop-filter:blur(16px) saturate(1.3);padding:9px 11px}
 body.dark .system-nav,body.dark .inspector{background:rgba(27,27,30,.72);border-color:rgba(255,255,255,.07)}
 body.dark .viewport{border-color:rgba(255,255,255,.06)}
}

/* Dark theme is strictly neutral: no navy tints. */
body.dark input[type=range]{accent-color:#cbcbcb}
body.dark .focus-reset{background:#e6e7ea;border-color:#e6e7ea;color:#151517;box-shadow:0 2px 10px #00000040}
body.dark .focus-reset:hover{background:#f2f3f5;border-color:#f2f3f5}
body.dark .inspector.focus-mode .focus-clear{background:#e6e7ea;border-color:#e6e7ea;color:#151517}
body.dark .header-toggle,.body.dark .official-list-toggle,.body.dark .detail-focus{color:#e6e7ea}
body.dark .part-shortcuts button.active,.body.dark .system-item.active,.body.dark .power-path button.active,.body.dark .nav-aux button.active,.body.dark .speed-control button.active,.body.dark .crown-position button.active,.body.dark .side-switch button.active,.body.dark .view-modes button.active{color:#f2f3f5;background:#2c2c2e;border-color:#3a3a3d}
body.dark .live-dot{background:#cbcbcb}
body.dark #time-dial #second{stroke:#cbcbcb}
/* Softer toast, circular canvas tools, circular full reset. */
.toast{background:rgba(255,255,255,.92);color:#26384c;border:1px solid rgba(20,30,50,.10);backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);border-radius:999px;box-shadow:0 10px 30px rgba(20,30,50,.14)}
body.dark .toast{background:rgba(44,44,46,.94);color:#e9eaec;border-color:rgba(255,255,255,.09);box-shadow:0 10px 30px #00000066}
.viewport-tools{border-radius:999px}
.viewport-tools button{border-radius:50%}
.selection-chip{border-radius:999px}
.guide-toggle,.light-toggle{border-radius:999px}
.light-panel{border-radius:18px}
.explosion-control{border-radius:999px}
#hard-reset{background:#f2f4f7;color:#3a66b0;border:1px solid rgba(20,30,50,.12)}
#hard-reset:hover{background:#e7edf5;color:#245ddd}
body.dark #hard-reset{background:#2c2c2e;color:#e6e7ea;border-color:#3a3a3d}
body.dark #hard-reset:hover{background:#333336;color:#f2f3f5}
@media(max-width:900px){#hard-reset{width:28px;height:28px}}

/* Outline toggle next to the lighting control. */
.outline-toggle{position:absolute;z-index:4;right:16px;bottom:56px;display:flex;align-items:center;gap:5px;background:#fffffff0;color:#597599;border:1px solid #dbe4ef;border-radius:999px;padding:8px;font-size:10px;backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);transition:background 160ms ease,color 160ms ease}
.outline-toggle .icon{width:14px;height:14px}
.outline-toggle.active{color:#245ddd;background:#f4f8ff}
.outline-toggle:hover{background:#eaf1fb}
body.dark .outline-toggle{background:rgba(44,44,46,.9);border-color:#3a3a3d;color:#cfcfcf}
body.dark .outline-toggle.active{color:#f2f3f5;background:#333336}
@media(max-width:900px){.outline-toggle{right:12px;bottom:50px}}
@media(max-width:640px){.outline-toggle{right:10px;bottom:48px;padding:7px;font-size:9px}}


/* Focus panel: label/output on one row, exit button on its own column, slider below. */
.inspector.focus-mode .focus-dim{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:3px 8px;align-items:center}
.focus-dim label{grid-column:1;grid-row:1;padding-right:0;display:flex;justify-content:space-between;align-items:baseline}
.focus-reset{position:static;grid-column:2;grid-row:1;justify-self:end;white-space:nowrap;padding:4px 10px;font-size:9px}
.focus-dim input[type=range]{grid-column:1/-1;grid-row:2}
.focus-dim p{grid-column:1/-1;grid-row:3}
@media(max-width:900px){
 .selected-part{min-width:0}
 .focus-clear{flex:0 0 auto;white-space:nowrap;max-width:96px;overflow:hidden;text-overflow:ellipsis}
}


/* ── Loading screen: two meshing gears from the movement's tooth profile ── */
.loader{position:fixed;inset:0;z-index:80;display:grid;place-items:center;background:var(--paper,#f4f6f9);color:var(--ink,#20242a);pointer-events:auto;transition:opacity .5s ease,visibility .5s ease;overflow:hidden}
.loader.done{opacity:0;visibility:hidden;pointer-events:none}
.loader-card{display:flex;flex-direction:column;align-items:center;gap:9px;width:min(420px,86vw);padding:30px 28px;text-align:center}
.loader-art{width:252px;height:168px;margin-bottom:2px}
.loader-gear-svg{width:100%;height:100%;overflow:visible}
.loader-gear .gear-body{stroke-width:1.1;stroke-linejoin:round}
.loader-gear--brass .gear-body{fill:#c9a96e;stroke:#8a6d3b}
.loader-gear--steel .gear-body{fill:#dfe4ea;stroke:#8b98a7}
.loader-gear--brass .gear-bore,.loader-gear--steel .gear-bore{fill:var(--paper,#f4f6f9);stroke:#9aa4af;stroke-width:.9}
.loader-gear--steel .gear-jewel{fill:#9c1736;stroke:#6c0f24;stroke-width:.5}
.loader-kicker{margin:0;font-size:9px;letter-spacing:.22em;text-transform:uppercase;color:#8b96a4;font-weight:500}
.loader-title{margin:2px 0 0;font-family:Georgia,'Times New Roman',serif;font-weight:400;font-size:27px;letter-spacing:.10em;color:#252a31}
.loader-status{margin:0;font-size:11px;letter-spacing:.06em;color:#7c8794;min-height:16px}
.loader-track{width:100%;height:2px;margin-top:6px;border-radius:2px;background:rgba(122,134,148,.18);overflow:hidden}
.loader-bar{display:block;width:0;height:100%;border-radius:2px;background:linear-gradient(90deg,#9fb0c2,#5c7fa3);transition:width .28s ease}
.loader-meta{display:flex;justify-content:space-between;width:100%;margin-top:1px;font:9px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.12em;color:#8b96a4}
.loader.failed .loader-status{color:#b3483c;letter-spacing:0}
.loader.failed .loader-track{opacity:.3}
.loader-retry{margin-top:10px;border:1px solid rgba(120,134,150,.4);background:transparent;color:#4a5a6d;border-radius:999px;padding:7px 16px;font-size:10px;letter-spacing:.08em;cursor:pointer}
.loader-retry:hover{background:rgba(120,134,150,.08)}
body.dark .loader{background:#141416;color:#e9eaec}
body.dark .loader-kicker,body.dark .loader-meta{color:#7f8288}
body.dark .loader-title{color:#e9eaec}
body.dark .loader-status{color:#9a9da3}
body.dark .loader-gear--brass .gear-body{fill:#b7985f;stroke:#6d5731}
body.dark .loader-gear--steel .gear-body{fill:#cfd3d9;stroke:#6f7780}
body.dark .loader-gear--brass .gear-bore,body.dark .loader-gear--steel .gear-bore{fill:#141416;stroke:#5f646b}
body.dark .loader-track{background:rgba(180,186,196,.14)}
body.dark .loader-bar{background:linear-gradient(90deg,#4f5b68,#9db3c8)}
body.dark .loader-retry{border-color:rgba(180,186,196,.32);color:#c8ccd2}
@media(max-width:520px){.loader-art{width:206px;height:138px}.loader-title{font-size:23px}.loader-card{gap:7px}}

/* loader composition polish */
.loader-card{width:min(460px,88vw)}
.loader-art{width:300px;height:200px}
.loader-halo{fill:none;stroke:rgba(120,134,150,.16);stroke-width:1}
body.dark .loader-halo{stroke:rgba(180,186,196,.12)}
.loader-track{height:3px;background:rgba(122,134,148,.22)}
.loader-bar{background:linear-gradient(90deg,#b7c5d6,#5c7fa3)}
body.dark .loader-bar{background:linear-gradient(90deg,#5a6673,#a9bdd1)}
.loader-meta{font-size:10px;color:#7d8896}
body.dark .loader-meta{color:#8b8e94}
.loader-title{font-size:28px}
@media(max-width:520px){.loader-art{width:246px;height:164px}.loader-title{font-size:24px}}

/* loader exit + app entrance */
.loader{transition:opacity .8s cubic-bezier(.4,0,.2,1),visibility .8s}
.loader-card{transition:transform .8s cubic-bezier(.22,1,.36,1),opacity .45s ease}
.loader.done{opacity:0;visibility:hidden;pointer-events:none}
.loader.done .loader-card{transform:translateY(-14px) scale(.985);opacity:0}
.loader-bar{transition:width .34s cubic-bezier(.22,1,.36,1)}
@keyframes ui-enter{from{opacity:0;transform:translateY(16px) scale(.994)}to{opacity:1;transform:none}}
body.ui-ready .header{animation:ui-enter .9s cubic-bezier(.22,1,.36,1) both}
body.ui-ready main{animation:ui-enter 1s cubic-bezier(.22,1,.36,1) both}
@media(prefers-reduced-motion:reduce){
 .loader{transition:opacity .3s ease}
 body.ui-ready .header,body.ui-ready main{animation:none}
}


/* Selection chip action: ghost pill instead of a white slab */
.selection-chip button{background:transparent;border:1px solid #c9d8ee;border-left:1px solid #c9d8ee;border-radius:999px;padding:4px 9px;margin-left:2px;color:#3566b0}
body.dark .selection-chip button{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.20);color:#e6e7ea}
body.dark .selection-chip button:hover{background:rgba(255,255,255,.14)}
/* Model-tone pill, stacked above the outline switch */
.model-tone-toggle{right:16px;bottom:96px}
@media(max-width:900px){.model-tone-toggle{right:12px;bottom:88px}}
@media(max-width:640px){.model-tone-toggle{right:10px;bottom:86px;padding:7px;font-size:9px}}

/* Model-tone switch only exists in the overall dark theme. */
#model-tone-toggle{display:none}
body.dark #model-tone-toggle{display:flex}