:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#0a0a0c;--panel:#0c0c10b8;--line:#ffffff24;--text:#e8e6e3;--muted:#9a958c;--accent:#7dd3c0;--warn:#f0b429;--safe-bottom:env(safe-area-inset-bottom,0px);--safe-top:env(safe-area-inset-top,0px);--island-bg:#0c0c10c7;--island-line:#ffffff1f;--island-blur:16px;--island-radius-collapsed:9999px;--island-radius-expanded:18px;--island-collapsed-max:min(196px, calc(100vw - 48px));--island-expanded-max:min(360px, calc(100vw - 20px));font-family:Inter,Noto Sans SC,PingFang SC,Microsoft YaHei,system-ui,sans-serif}*{box-sizing:border-box}:focus{outline:none}:focus-visible{outline-offset:2px;outline:2px solid #7dd3c0f2}html,body{background:var(--bg);width:100%;height:100%;color:var(--text);-webkit-tap-highlight-color:transparent;margin:0;overflow:hidden}#app{background:radial-gradient(at 50% 38%,#1a1a24 0%,#070709 68%),repeating-linear-gradient(0deg,#0000,#0000 3px,#ffffff03 3px 4px);width:100%;height:100%;position:relative}#video{object-fit:cover;opacity:.62;width:100%;height:100%;display:none;position:absolute;inset:0;transform:scaleX(-1)}#video.live{display:block}#overlay{touch-action:none;width:100%;height:100%;display:block;position:absolute;inset:0}#topbar{left:14px;top:calc(12px + var(--safe-top));z-index:5;pointer-events:none;max-width:min(320px,100vw - 28px);transition:opacity .55s;position:absolute}#topbar .brand{letter-spacing:-.03em;text-shadow:0 1px 12px #0000008c;margin:0;font-size:clamp(1.2rem,3.8vw,1.55rem);font-weight:700;line-height:1.1;transition:opacity .55s,filter .55s,color .55s}#topbar .tagline{color:var(--muted);text-shadow:0 1px 8px #00000080;margin:6px 0 0;font-size:12px;line-height:1.35;transition:opacity .45s}#topbar[data-brand=loading] .brand{opacity:.88}#topbar[data-brand=loading] .tagline{opacity:.7}#topbar[data-brand=active] .brand{opacity:.18;color:var(--text);-webkit-text-fill-color:var(--text);filter:none;text-shadow:none;background:0 0;animation:none}#topbar[data-brand=active] .tagline,#topbar[data-brand=idle] .tagline{opacity:0;height:0;margin:0;overflow:hidden}#hud-scrim{z-index:4;opacity:1;background:#00000047;transition:opacity .28s;position:absolute;inset:0}#hud-scrim.hidden{opacity:0;pointer-events:none}#hud{left:50%;bottom:calc(10px + var(--safe-bottom));z-index:5;width:max-content;max-width:var(--island-collapsed-max);border:1px solid var(--island-line);border-radius:var(--island-radius-collapsed);background:var(--island-bg);-webkit-backdrop-filter:blur(var(--island-blur));gap:0;padding:3px 5px 3px 8px;font-size:12px;transition:max-width .24s,border-radius .22s,padding .22s,box-shadow .22s;display:grid;position:absolute;transform:translate(-50%);box-shadow:0 6px 24px #00000059}#hud[data-state=expanded]{width:var(--island-expanded-max);max-width:var(--island-expanded-max);border-radius:var(--island-radius-expanded);gap:8px;padding:10px 12px 12px;box-shadow:0 10px 32px #0006}.hud-bar{align-items:center;gap:4px;min-height:28px;display:flex}.hud-meta{flex-shrink:0;align-items:center;gap:2px;display:flex}#btn-cam-quick{text-align:left;cursor:pointer;min-width:0;color:inherit;background:0 0;border:none;border-radius:999px;flex:1;align-items:center;gap:6px;min-height:28px;padding:4px 6px;display:flex}#btn-cam-quick:hover{background:#ffffff0a;border-color:#0000}#hud-toggle{background:0 0;border:none;border-radius:999px;flex-shrink:0;width:28px;height:28px;padding:0}#hud-toggle:hover{background:#ffffff0a}#status{min-width:0;color:var(--muted);letter-spacing:.01em;white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:11px;font-weight:500;line-height:1.2;transition:opacity .3s;overflow:hidden}#hud[data-state=expanded] #status{font-size:12px}.hud-chevron{opacity:.65;flex-shrink:0;width:14px;height:14px;position:relative}.hud-chevron:before{content:"";border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);width:6px;height:6px;transition:transform .22s;position:absolute;top:50%;left:50%;transform:translate(-50%,-65%)rotate(45deg)}#hud[data-state=expanded] .hud-chevron:before{transform:translate(-50%,-25%)rotate(225deg)}#btn-about{width:28px;height:28px;color:var(--muted);background:#ffffff0d;border:1px solid #0000;border-radius:999px;flex-shrink:0;padding:0;font-size:13px;font-weight:600;line-height:1}#btn-about:hover{color:var(--text);border-color:#fff3}#btn-about[aria-expanded=true]{color:var(--accent);background:#7dd3c01f;border-color:#7dd3c08c}#btn-lang{width:28px;height:28px;color:var(--muted);cursor:pointer;background:#ffffff0d;border:1px solid #0000;border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;padding:0;line-height:1;display:inline-flex}#btn-lang .iconify{width:15px;height:15px;font-size:15px}#btn-lang:hover{color:var(--text);border-color:#fff3}.hud-stop{color:#d8fff5;background:#7dd3c01f;border-color:#7dd3c066;border-radius:999px;flex-shrink:0;height:28px;min-height:28px;padding:0 10px;font-size:11px;font-weight:600;transition:opacity .25s,transform .25s}.hud-stop.hidden{opacity:0;pointer-events:none;transform:scale(.9)}#hud-panel{opacity:1;gap:8px;max-height:420px;transition:max-height .28s,opacity .22s;display:grid;overflow:hidden}#hud-panel[hidden]{opacity:0;pointer-events:none;max-height:0;display:grid}#hud[data-state=collapsed] #hud-panel{display:none}#angles-readout{font-variant-numeric:tabular-nums;color:var(--accent);text-align:center;min-height:1.15em;font-family:IBM Plex Mono,JetBrains Mono,SF Mono,ui-monospace,monospace;font-size:12px}#angles-readout:empty{display:none}button{font:inherit;color:var(--text);border:1px solid var(--line);cursor:pointer;background:#ffffff0f;border-radius:10px;padding:8px 12px;transition:border-color .2s,background-color .2s,color .2s}button:hover{border-color:#ffffff47}button:active:not(:disabled){transition-duration:80ms;transform:scale(.97)}button:disabled{opacity:.55;cursor:wait}button.primary{letter-spacing:.01em;color:#d8fff5;background:#7dd3c024;border-color:#7dd3c073;width:100%;padding:12px 14px;font-size:14px;font-weight:600}button.primary.active{border-color:var(--accent);background:#7dd3c038}button.primary:hover{border-color:var(--accent)}.chips{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.chip{color:var(--muted);border-radius:999px;padding:6px 10px;font-size:12px;transition:color .2s,border-color .2s,background-color .2s}.chip.active{color:var(--accent);background:#7dd3c01f;border-color:#7dd3c08c}#guess-panel{border-top:1px solid var(--line);opacity:1;gap:8px;max-height:180px;padding-top:6px;transition:max-height .25s,opacity .2s,padding-top .25s;display:grid;overflow:hidden}#guess-panel.hidden{opacity:0;pointer-events:none;border-top-color:#0000;max-height:0;padding-top:0}#guess-panel label{color:var(--muted);gap:6px;font-size:12px;display:grid}#guess-panel input[type=number]{font:inherit;color:var(--text);border:1px solid var(--line);background:#ffffff0f;border-radius:8px;width:100%;padding:8px 10px}#guess-result{color:var(--warn);text-align:center;min-height:1.2em;font-family:IBM Plex Mono,JetBrains Mono,SF Mono,ui-monospace,monospace}#angle-labels{pointer-events:none;z-index:4;position:absolute;inset:0}.angle-tag{color:#fff;font-variant-numeric:tabular-nums;white-space:nowrap;text-shadow:0 1px 2px #000c;background:#0000008c;border:1px solid #ffffff59;border-radius:999px;padding:2px 7px;font-family:IBM Plex Mono,JetBrains Mono,SF Mono,ui-monospace,monospace;font-size:12px;position:absolute;transform:translate(-50%,-50%)}.demo-handle{cursor:grab;z-index:6;touch-action:none;background:#7dd3c047;border:2px solid #ffffffd9;border-radius:50%;width:36px;height:36px;margin:-18px 0 0 -18px;position:absolute;box-shadow:0 0 0 1px #0006}.demo-handle:active{cursor:grabbing}.demo-handle.right{background:#f0b42947;border-color:#f0b429}#about-backdrop{z-index:9;opacity:1;background:#00000073;transition:opacity .3s;position:absolute;inset:0}#about-backdrop.hidden{opacity:0;pointer-events:none}#about-panel{z-index:10;border:1px solid var(--line);background:var(--panel);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);opacity:1;border-radius:16px;width:min(380px,100vw - 28px);max-height:min(78vh,100% - 48px);padding:16px 16px 14px;font-size:13px;line-height:1.45;transition:opacity .3s,transform .3s cubic-bezier(.2,.9,.25,1.1);position:absolute;top:50%;left:50%;overflow:auto;transform:translate(-50%,-50%)scale(1)}#about-panel.hidden{opacity:0;pointer-events:none;transform:translate(-50%,-50%)scale(.96)translateY(6px)}#about-panel .about-close{width:2rem;height:2rem;color:var(--muted);cursor:pointer;background:#ffffff0f;border:none;border-radius:999px;font-size:1.15rem;line-height:1;transition:color .2s,background-color .2s;position:absolute;top:.65rem;right:.65rem}#about-panel .about-close:hover{color:var(--text);background:#ffffff1a}#about-panel h2{letter-spacing:-.02em;margin:0 2rem 10px 0;font-size:1.1rem;font-weight:800}#about-panel h3{letter-spacing:.05em;text-transform:uppercase;color:var(--accent);margin:12px 0 4px;font-size:11px;font-weight:600}#about-panel p{color:var(--text);margin:0}#about-panel code{color:var(--accent);font-family:IBM Plex Mono,JetBrains Mono,SF Mono,ui-monospace,monospace;font-size:.92em}#about-panel a{color:var(--accent)}#about-panel .about-attr{border-top:1px solid var(--line);color:var(--muted);background:#0c0c10;border-radius:0 0 16px 16px;margin:14px -16px -14px;padding:10px 16px 12px;font-size:12px;position:sticky;bottom:-14px;box-shadow:0 -8px 16px #0c0c10e6}#webgl-fallback{z-index:7;text-align:center;background:var(--bg);place-items:center;padding:28px;display:grid;position:absolute;inset:0}#webgl-fallback p{border:1px solid var(--line);background:var(--panel);max-width:340px;color:var(--text);border-radius:16px;margin:0;padding:18px 20px;font-size:14px;line-height:1.45}html.capture-clean .pop-noise,html.capture-clean .pop-progress,html.capture-clean #topbar .tagline,html.capture-clean .capture-hidden,.capture-hidden{display:none!important}html.capture-clean #topbar{text-align:center;max-width:none;left:50%;transform:translate(-50%)}html.capture-clean #topbar .brand{letter-spacing:-.04em;font-size:clamp(1.5rem,5vw,2rem);opacity:.95!important;color:var(--text)!important;-webkit-text-fill-color:var(--text)!important;background:0 0!important;animation:none!important}html.capture-clean .demo-handle{opacity:.35}@media (pointer:fine) and (width>=768px){:root{--island-collapsed-max:min(220px, calc(100vw - 48px));--island-expanded-max:min(400px, calc(100vw - 24px))}#hud{padding:4px 6px 4px 10px}.hud-bar{min-height:30px}#btn-about,#btn-lang,#hud-toggle,.hud-stop{width:30px;height:30px}#btn-lang{width:auto;min-width:30px;padding:0 8px}.hud-stop{width:auto;padding:0 11px}}@media (width<=480px){#topbar .tagline{display:none}#topbar{left:12px;top:calc(10px + var(--safe-top))}#topbar .brand{font-size:1.15rem}#hud{bottom:calc(8px + var(--safe-bottom))}#hud[data-state=expanded]{gap:8px;max-height:min(40vh,340px);padding:10px 12px 12px;overflow:auto}button.primary{padding:12px 14px}.demo-handle{width:42px;height:42px;margin:-21px 0 0 -21px}}@media (prefers-reduced-motion:reduce){#hud,.hud-chevron:before,#topbar,#topbar .brand,#topbar .tagline{transition:none}button:active:not(:disabled){transform:none}}:root{--pop-progress-h:3px;--pop-progress-from:#7dd3c0;--pop-progress-to:#f0b429;--pop-reveal-y:44px;--pop-reveal-ms:.7s;--pop-reveal-ease:cubic-bezier(.22, 1, .36, 1);--pop-dot-fg:#e8e6e366;--pop-dot-active:#7dd3c0f2;--pop-scrollbar:#7dd3c073;--pop-selection-bg:#7dd3c059;--pop-selection-fg:#e8e6e3;--pop-noise-opacity:.045}html{scroll-behavior:smooth}::selection{background:var(--pop-selection-bg);color:var(--pop-selection-fg)}.pop-progress{height:var(--pop-progress-h);z-index:9999;pointer-events:none;background:linear-gradient(90deg, var(--pop-progress-from), var(--pop-progress-to));transform-origin:0;will-change:width;width:0%;position:fixed;top:0;left:0}.pop-reveal{opacity:0;transform:translate3d(0, var(--pop-reveal-y), 0);transition:opacity var(--pop-reveal-ms) var(--pop-reveal-ease), transform var(--pop-reveal-ms) var(--pop-reveal-ease);will-change:opacity, transform}.pop-reveal.is-in{opacity:1;transform:translate(0,0)}.pop-chapters{top:50%;right:max(12px, env(safe-area-inset-right));z-index:40;flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex;position:fixed;transform:translateY(-50%)}.pop-chapters a{letter-spacing:.04em;min-width:28px;min-height:28px;color:var(--pop-dot-fg);border-radius:999px;place-items:center;font-family:ui-serif,Georgia,Times New Roman,serif;font-size:11px;text-decoration:none;transition:color .16s,background .16s,transform .16s;display:grid}.pop-chapters a[aria-current=true]{color:var(--pop-dot-active);background:#7dd3c01f;transform:scale(1.06)}.pop-chapters a:hover,.pop-chapters a:focus-visible{color:var(--pop-dot-active);outline:none}@media (width<=900px){.pop-chapters{display:none}}.pop-noise{pointer-events:none;z-index:50;opacity:var(--pop-noise-opacity);mix-blend-mode:overlay;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");background-repeat:repeat;background-size:180px 180px;position:fixed;inset:0}*{scrollbar-width:thin;scrollbar-color:var(--pop-scrollbar) transparent}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-thumb{background:var(--pop-scrollbar);background-clip:padding-box;border:2px solid #0000;border-radius:999px}::-webkit-scrollbar-track{background:0 0}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.pop-progress{display:none}.pop-reveal,.pop-reveal.is-in{opacity:1;transition:none;transform:none}}