:root{--page:#eff3f9;--paper:#fff;--ink:#161d35;--muted:#748097;--line:#dde4f0;--blue:#335cf4;--pale:#eef2ff;--stage:#091322;font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);font-synthesis:none;color-scheme:light}
*{box-sizing:border-box}body{margin:0;background:var(--page)}button,input{font:inherit}button{cursor:pointer}button:disabled{opacity:.6;cursor:wait}button,a,input{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #335cf4;outline-offset:4px}button{border:0}.icon-defs{position:absolute;width:0;height:0;overflow:hidden}.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}[hidden]{display:none!important}
.app-header{height:88px;padding:0 4.4vw;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:36px;background:rgba(255,255,255,.6)}.brand{display:flex;gap:12px;align-items:center;font-size:23px;font-weight:700;text-decoration:none;color:var(--ink)}.brand-mark{width:40px;height:40px;background:var(--blue);border-radius:12px;display:grid;place-items:center}.brand-mark svg{width:27px;height:27px;fill:none;stroke:white;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.brand-english{font:700 14px "Trebuchet MS",sans-serif;letter-spacing:.16em;margin-left:10px;vertical-align:middle}.header-note{font-size:14px;color:var(--muted)}.privacy{margin-left:auto;font-size:13px;color:#596680;display:flex;align-items:center;gap:8px}.privacy-symbol{font-size:21px;color:var(--blue)}
.workspace{max-width:1520px;margin:0 auto;padding:34px 4.4vw 24px;display:grid;grid-template-columns:minmax(0,1fr) 292px;gap:28px;align-items:start}.section-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.eyebrow{font:11px "Trebuchet MS",sans-serif;letter-spacing:.18em;color:var(--muted)}h1{font-size:28px;font-weight:600;letter-spacing:-.04em;margin:7px 0 0;line-height:1.4}.experiment-tag{font-size:12px;border:1px solid #d0daed;border-radius:25px;padding:7px 12px;color:#75829c}.stage-shell{background:var(--stage);border-radius:18px;overflow:hidden;box-shadow:0 12px 34px #18356413}.stage-topbar{padding:12px 16px;display:flex;justify-content:space-between;align-items:center;background:#111e32;gap:12px}.source-tabs{display:flex;gap:4px;align-items:center}.source-tab{padding:9px 14px;display:flex;align-items:center;gap:8px;color:#9daac1;background:transparent;border-radius:8px;font-size:13px;white-space:nowrap}.source-tab.active{color:#fff;background:#29384f}.source-tab:not(.active):hover{background:#1e2e46;color:white}.source-tab .icon{width:16px;height:16px}.source-status{font-size:12px;color:#92a0b8}.stage{position:relative;aspect-ratio:16/10;overflow:hidden;touch-action:none;cursor:grab;background:var(--stage);isolation:isolate}.stage.dragging{cursor:grabbing}.stage canvas{width:100%;height:100%;position:absolute;inset:0;display:block}.stage canvas#overlay{pointer-events:none}.stage-label{position:absolute;top:21px;left:22px;display:flex;gap:8px;align-items:center;font-size:11px;color:#e3eafa;background:#0712217d;padding:7px 10px;border:1px solid #ffffff20;border-radius:6px;backdrop-filter:blur(8px);pointer-events:none}.status-dot{width:6px;height:6px;display:inline-block;background:#70ddc4;border-radius:50%}.status-dot.demo{background:#95aaff}.stage-label-divider{width:1px;height:10px;background:#ffffff3b;margin:0 2px}.stage-hint{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);font-size:12px;white-space:nowrap;color:#dae5fb;background:#0a1725b5;backdrop-filter:blur(8px);border:1px solid #ffffff18;padding:8px 15px;border-radius:30px;pointer-events:none}.stage-fullscreen{position:absolute;bottom:16px;right:16px;background:#0b172b9c;color:#cfdbef;backdrop-filter:blur(8px)}.icon-button{width:36px;height:36px;display:grid;place-items:center;border-radius:9px}.icon-button:hover{background:#38557b}.stage-bottom{padding:14px 19px;color:#9baec9;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:12px;background:#111e32}.tracking-status{display:flex;align-items:center;gap:9px}.tracking-status .icon{width:16px;height:16px;color:#b2c6e9}.stage-metrics{display:flex;gap:14px;font:11px Consolas,monospace;white-space:nowrap}.stage-error{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;background:#091322ea;color:white;z-index:3;padding:25px;text-align:center}.stage-error span{font-size:14px;color:#b0c1dc;max-width:420px;line-height:1.8}.paused-badge{position:absolute;right:20px;top:20px;background:#fff1c7;color:#604306;border-radius:6px;font-size:12px;padding:7px 10px}
.play-controls{display:flex;gap:14px;justify-content:space-between;align-items:center;margin-top:18px}.control-mode{display:flex;background:#e2e9f4;padding:4px;border-radius:10px}.control-mode button{background:transparent;border-radius:7px;display:flex;align-items:center;gap:7px;padding:9px 11px;color:#72819b;font-size:13px;white-space:nowrap}.control-mode button.active{background:white;color:var(--blue);box-shadow:0 2px 5px #2647780b}.control-mode .icon{width:16px;height:16px}.action-buttons{display:flex;align-items:center;gap:10px}.text-button{display:flex;align-items:center;gap:6px;padding:10px 6px;color:#66758e;font-size:13px;background:transparent;white-space:nowrap}.text-button:hover{color:var(--blue)}.text-button .icon{width:16px;height:16px}.capture-button{color:#fff;background:var(--blue);display:flex;align-items:center;gap:8px;border-radius:9px;padding:11px 16px;font-size:13px;white-space:nowrap;box-shadow:0 3px 8px #335cf425}.capture-button:hover{background:#244add}.capture-button .icon{width:17px;height:17px}.gesture-guide{display:flex;gap:13px;align-items:center;margin-top:26px;padding:0 4px}.guide-icon{width:41px;height:41px;display:grid;place-items:center;background:#e3e9fa;color:#6780c0;border-radius:12px;flex-shrink:0}.gesture-guide strong{font-size:13px;font-weight:600}.gesture-guide p{font-size:12px;color:var(--muted);line-height:1.8;margin:4px 0 0}.guide-key{font-size:11px;color:#8591a7;white-space:nowrap;margin-left:auto;align-self:flex-start;padding-top:3px}
.settings{background:white;border:1px solid #e1e7f0;border-radius:16px;padding:24px 21px;margin-top:87px;box-shadow:0 4px 12px #18356403}.settings-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.settings-heading h2{font-size:16px;font-weight:600;margin:0}.settings-heading .icon{color:#7183a5;width:18px;height:18px}.effect-list{display:grid;gap:9px}.effect-card{display:flex;align-items:center;text-align:left;padding:11px 10px;background:#fff;border:1px solid #e7ebf3;border-radius:10px;gap:12px;color:var(--ink);transition:background .16s,border-color .16s}.effect-card:hover{background:#f8faff;border-color:#becbf1}.effect-card.selected{background:var(--pale);border-color:#b7c6fb;box-shadow:inset 0 0 0 1px #335cf418}.effect-preview{height:44px;width:44px;border-radius:8px;overflow:hidden;flex-shrink:0}.thermal-preview{background:radial-gradient(ellipse at 20% 80%,#542de9,transparent 58%),radial-gradient(ellipse at 80% 10%,#ff6722,transparent 60%),linear-gradient(30deg,#1ddeeb 5%,#516af3 40%,#ee399e 65%,#ffa54b)}.edge-preview{background:repeating-radial-gradient(ellipse at 75% 75%,#172232 0 5px,#b2c4db 5px 6px,#142030 7px 12px)}.glass-preview{background:radial-gradient(ellipse at 35% 45%,#fff9 0 3%,#7caef188 6%,transparent 30%),radial-gradient(ellipse at 60% 60%,transparent 20%,#d6e9ff 26%,#6d8eb1 31%,transparent 37%),linear-gradient(130deg,#344b6b,#cae7f7 40%,#6e97c8 60%,#def1fb)}.effect-copy{display:flex;flex-direction:column;gap:6px}.effect-copy strong{font-size:14px;font-weight:600}.effect-copy>span{font-size:11px;color:#8b96aa}.effect-key{font:11px Consolas,monospace;color:#8798ba;margin-left:auto;background:#f1f4f9;width:19px;height:21px;display:grid;place-items:center;border-radius:4px}.selected .effect-key{background:#dce4ff;color:var(--blue)}.settings-divider{height:1px;background:#edf0f5;margin:24px 0}.slider-group{margin:0 0 23px}.slider-group:last-child{margin:0}.slider-group label{display:flex;align-items:center;justify-content:space-between;font-size:13px;margin-bottom:13px;color:#4c5b73}.slider-group output{font:12px Consolas,monospace;color:var(--blue)}input[type=range]{appearance:none;height:4px;border-radius:5px;background:linear-gradient(to right,var(--blue) 0%,var(--blue) var(--fill,70%),#e7edf6 var(--fill,70%),#e7edf6 100%);width:100%;margin:8px 0;cursor:pointer}input[type=range]::-webkit-slider-thumb{appearance:none;width:15px;height:15px;border-radius:50%;border:3px solid white;background:var(--blue);box-shadow:0 0 0 1px #cbd6f6,0 2px 4px #23428420}input[type=range]::-moz-range-thumb{width:10px;height:10px;border-radius:50%;border:3px solid white;background:var(--blue);box-shadow:0 0 0 1px #cbd6f6}.range-captions{display:flex;justify-content:space-between;font-size:11px;color:#96a0b1;margin-top:7px}.switch-row{position:relative;display:flex;justify-content:space-between;align-items:center;margin:18px 0;font-size:13px;color:#4c5b73;cursor:pointer}.switch-row input{position:absolute;right:0;width:34px;height:20px;opacity:0;cursor:pointer}.switch-track{width:34px;height:20px;border-radius:20px;background:#dce4f0;pointer-events:none;transition:background .15s}.switch-track:after{content:"";display:block;margin:3px;width:14px;height:14px;border-radius:50%;background:white;box-shadow:0 1px 3px #172a5226;transition:transform .15s}.switch-row input:checked+.switch-track{background:var(--blue)}.switch-row input:checked+.switch-track:after{transform:translateX(14px)}.switch-row input:focus-visible+.switch-track{outline:3px solid #7895ff;outline-offset:3px}.effect-note{display:flex;gap:9px;align-items:start;padding:14px 0 0;margin-top:24px;border-top:1px solid #edf0f5;color:#8b97ac}.note-mark{font:11px Georgia,serif;border:1px solid #a9b5c9;border-radius:50%;width:14px;height:14px;display:grid;place-items:center;flex-shrink:0;margin-top:3px}.effect-note p{font-size:11px;line-height:1.8;margin:0}.stop-camera{background:#f2f5fa;color:#677690;font-size:12px;border-radius:7px;padding:9px;width:100%;margin-top:17px}.stop-camera:hover{background:#e9eff9}.app-footer{max-width:1520px;margin:0 auto;padding:10px 4.4vw 22px;display:flex;justify-content:space-between;gap:12px;font-size:11px;color:#91a0b7}.footer-dot{padding:0 9px;color:#c1cbdc}.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:#17243b;color:white;box-shadow:0 8px 32px #17243b25;padding:14px 22px;max-width:calc(100vw - 32px);width:max-content;font-size:14px;line-height:1.5;border-radius:12px;z-index:10}.stage:fullscreen{width:100vw;height:100vh;aspect-ratio:auto;background:#000}.stage:fullscreen .stage-hint{bottom:32px}
@media(min-width:1600px){.workspace{padding-top:42px}.stage{aspect-ratio:16/9}}
@media(max-width:1120px){.workspace{gap:20px;grid-template-columns:minmax(0,1fr) 265px;padding-left:3vw;padding-right:3vw}.settings{padding:21px 17px}.guide-key{display:none}.play-controls{align-items:stretch;flex-direction:column}.action-buttons{justify-content:flex-end}.control-mode{align-self:flex-start}.stage{aspect-ratio:4/3}.header-note{display:none}}
@media(max-width:780px){.app-header{height:72px;padding:0 20px}.privacy{font-size:11px}.brand{font-size:21px}.brand-english{font-size:12px}.workspace{padding:24px 20px;display:flex;flex-direction:column;gap:24px}.playground,.settings{width:100%}.section-heading{margin-bottom:17px}h1{font-size:25px}.experiment-tag{display:none}.settings{margin:0;padding:22px}.effect-list{grid-template-columns:repeat(3,minmax(0,1fr))}.effect-card{flex-direction:column;align-items:flex-start;gap:9px;position:relative;padding:12px}.effect-key{position:absolute;right:9px;top:12px}.effect-copy>span{display:none}.settings-divider{margin:20px 0}.play-controls{flex-direction:row;flex-wrap:wrap;gap:12px}.control-mode{flex:1}.control-mode button{flex:1;justify-content:center}.action-buttons{flex:1;justify-content:flex-end}.source-status{display:none}.stage{aspect-ratio:4/3}.stage-bottom{padding:12px;font-size:11px}.stage-metrics{gap:8px;font-size:10px}.gesture-guide{margin-top:20px}.gesture-guide p{font-size:12px}.app-footer{padding:0 20px 24px}.effect-note p{font-size:12px}}
@media(max-width:400px){.workspace{padding:20px 12px}.app-header{padding:0 14px;gap:8px}.privacy-symbol{display:none}.header-note{display:none}.brand-english{margin-left:7px}.capture-button{padding:11px 12px}.stage-label{top:13px;left:13px}.stage-hint{font-size:11px;padding:7px 10px;max-width:85%;white-space:normal;text-align:center}.stage-metrics #resolution{display:none}.effect-copy strong{font-size:12px}.control-mode{flex-basis:100%}.action-buttons{justify-content:space-between}.app-footer{font-size:10px;padding:0 12px 20px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}

/* The six effects form a compact palette; numbered tabs select the physical
   sheet being edited, while card numbers remain keyboard shortcuts. */
.face-count-group{margin-bottom:17px}.face-tabs{display:flex;gap:7px;flex-wrap:wrap}.face-tab{position:relative;display:grid;place-items:center;flex:1;min-width:29px;height:33px;background:#f1f4fa;border:1px solid #dde5f2;border-radius:7px;color:#6d7d99;font:12px Consolas,monospace}.face-tab:before{content:"";position:absolute;bottom:4px;width:12px;height:2px;border-radius:2px;background:var(--face-color,#647aad)}.face-tab.active{background:#edf2ff;border-color:#819cfa;color:var(--blue);box-shadow:0 0 0 1px #335cf410}.face-tab:hover{border-color:#a8bdf8}.face-help{font-size:12px;color:#8390a6;line-height:1.8;margin:12px 0 21px}.face-thermal{--face-color:#ec5b50}.face-edge{--face-color:#182438}.face-glass{--face-color:#83b4d7}.face-halftone{--face-color:#cc2045}.face-duotone{--face-color:#12669a}.face-grain{--face-color:#b8a235}.effect-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.effect-card{position:relative;flex-direction:column;align-items:flex-start;gap:8px;padding:11px;min-width:0}.effect-key{position:absolute;top:11px;right:8px}.effect-copy>span{display:none}.effect-copy strong{font-size:13px}.effect-preview{width:38px;height:38px}.halftone-preview{background-color:#fffaf1;background-image:radial-gradient(circle,#bd183b 0 2px,transparent 2.4px);background-size:7px 7px}.duotone-preview{background:linear-gradient(145deg,#075287 0 48%,#fcfcf5 49% 65%,#075287 66%)}.grain-preview{background-image:repeating-radial-gradient(circle at 20% 30%,#fff8 0 1px,transparent 1px 3px),linear-gradient(125deg,#125b8e 15%,#2c8e49 40%,#e7cc30 65%,#fcf8db 80%);background-size:7px 9px,100% 100%}input[type=range]:disabled{opacity:.4;cursor:default}.settings .settings-heading{margin-bottom:16px}.settings .settings-divider{margin:20px 0}
@media(max-width:780px){.effect-list{grid-template-columns:repeat(3,minmax(0,1fr))}.effect-copy strong{font-size:13px}.effect-preview{width:42px;height:42px}.face-tab{flex:0 0 38px}.settings{padding:22px}.settings .slider-group{margin-bottom:23px}}