:root{--primary-blue:#12182b;--dark-blue:#1d2939;--orange:#f6921e;--secondary-orange:#d77709;--dark-orange:#f58500;--sky-blue:#02bfdf;--header-blue:#00b5f0;--green-1:#00aea4;--comment-teal:#00837d;--charcoal:#5d6683;--grey:#949bb3;--black-smoke:#dbdee6;--light-blue:#ecedf2;--white:#fff;--grey-shade-4:#f0f1f3;--font-ui:"Inter", system-ui, sans-serif;--font-body:"Poppins", "Inter", system-ui, sans-serif;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#2a2f38;--bg-panel:#12182bf0;--text:var(--white);--muted:var(--grey);--radius-btn:8px;--shadow-btn:0 3px 0;--safe-bottom:env(safe-area-inset-bottom,0px);--safe-top:env(safe-area-inset-top,0px);--safe-right:env(safe-area-inset-right,0px);--safe-left:env(safe-area-inset-left,0px)}*{box-sizing:border-box}html,body,#root{background:var(--bg);width:100%;height:100%;color:var(--text);font-family:var(--font-body);-webkit-font-smoothing:antialiased;touch-action:manipulation;-webkit-user-select:none;user-select:none;margin:0;overflow:hidden}button{font-family:var(--font-ui)}.experience-shell{width:100%;height:100%;position:relative}.experience-canvas{touch-action:none;inset:0;position:absolute!important}.hud{pointer-events:none;padding:16px 16px calc(16px + var(--safe-bottom));flex-direction:column;justify-content:space-between;gap:10px;display:flex;position:absolute;inset:0}.hud-top,.organ-info,.phase-rail,.hotspot,.brand-mark-corner{pointer-events:auto}.hud-spacer{pointer-events:none;flex:1}.hud-top{justify-content:flex-start;align-items:flex-start;padding-right:148px;display:flex}.brand-logo{filter:drop-shadow(0 2px 8px #12182b66);width:auto;max-width:min(280px,62vw);height:36px;display:block}.experience-title{pointer-events:none;top:calc(18px + var(--safe-top));text-align:center;width:min(70vw,420px);font-family:var(--font-ui);letter-spacing:-.02em;color:var(--white);text-shadow:0 2px 12px #12182b8c;margin:0;font-size:clamp(1.35rem,4.2vw,1.85rem);font-weight:800;line-height:1.15;position:absolute;left:50%;transform:translate(-50%)}.brand-mark-corner{right:calc(16px + var(--safe-right));bottom:calc(16px + var(--safe-bottom));filter:drop-shadow(0 4px 12px #12182b73);pointer-events:none;width:56px;height:auto;position:absolute}.phase-rail{top:50%;right:calc(14px + var(--safe-right));width:auto;box-shadow:none;background:0 0;border:none;flex-direction:column;align-items:stretch;gap:10px;margin:12px 0;padding:12px 0;display:flex;position:absolute;transform:translateY(-50%)}.tv-btn{appearance:none;width:auto;min-width:92px;min-height:34px;font-family:var(--font-ui);letter-spacing:-.01em;cursor:pointer;text-align:center;white-space:nowrap;border:none;border-radius:10px;justify-content:center;align-items:center;margin:0;padding:8px 14px;font-size:.78rem;font-weight:700;transition:transform .12s,filter .12s;display:inline-flex}.tv-btn:active{transform:translateY(2px);box-shadow:none!important}.tv-btn-primary{background:var(--orange);color:var(--white);box-shadow:none}.tv-btn-primary:hover{filter:brightness(1.05)}.tv-btn-secondary{background:var(--black-smoke);color:var(--charcoal);box-shadow:none}.tv-btn-secondary:hover{filter:brightness(1.03)}.organ-info{--organ-accent:var(--sky-blue);--organ-accent-soft:#02bfdf29;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:linear-gradient(#1d2939f5 0%,#12182bf5 100%);border:1px solid #dbdee61f;border-radius:16px;align-self:center;width:min(420px,100% - 32px);margin:0 auto 8px;padding:16px 16px 14px;animation:.18s ease-out organ-info-in;position:relative;overflow:hidden;box-shadow:0 18px 40px #00000059,inset 0 1px #ffffff0d}.organ-info-accent{background:var(--organ-accent);width:4px;position:absolute;top:0;bottom:0;left:0}@keyframes organ-info-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.organ-info-top{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.organ-info-identity{align-items:center;gap:12px;min-width:0;display:flex}.organ-info-icon{width:42px;height:42px;color:var(--organ-accent);background:var(--organ-accent-soft);border:1px solid color-mix(in srgb, var(--organ-accent) 35%, transparent);border-radius:12px;flex-shrink:0;place-items:center;display:grid}.organ-info-badge{font-family:var(--font-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--organ-accent);margin:0 0 2px;font-size:.68rem;font-weight:600}.organ-info h2{font-family:var(--font-ui);letter-spacing:-.02em;color:var(--white);margin:0;font-size:1.15rem;font-weight:800;line-height:1.2}.organ-info-close{appearance:none;cursor:pointer;width:32px;height:32px;color:var(--grey);background:#949bb329;border:none;border-radius:50%;flex-shrink:0;place-items:center;transition:background .14s,color .14s;display:grid}.organ-info-close:hover{color:var(--white);background:#949bb347}.organ-info-summary{font-family:var(--font-body);color:var(--black-smoke);margin:12px 0 0;font-size:.88rem;font-weight:400;line-height:1.45}.organ-info-facts{gap:8px;margin:12px 0 0;padding:0;list-style:none;display:grid}.organ-info-facts li{font-family:var(--font-body);color:var(--white);background:#ffffff0a;border:1px solid #ffffff0f;border-radius:10px;align-items:flex-start;gap:8px;margin:0;padding:8px 10px;font-size:.8rem;font-weight:400;line-height:1.4;display:flex}.organ-fact-icon{color:var(--organ-accent);flex-shrink:0;place-items:center;margin-top:1px;display:grid}.organ-html-label,.organ-html-label>div{box-shadow:none!important;background:0 0!important;border:none!important;outline:none!important}.hotspot{pointer-events:none;background:0 0;align-items:center;gap:4px;line-height:0;display:inline-flex;position:relative}.hotspot-dot{appearance:none;pointer-events:auto;cursor:pointer;background:#111111d9;border:1.5px solid #fff;border-radius:50%;width:11px;min-width:11px;height:11px;min-height:11px;margin:0;padding:0;transition:background .12s,transform .12s;box-shadow:0 1px 3px #00000059}.hotspot-dot:hover,.hotspot.is-active .hotspot-dot{background:var(--orange);transform:scale(1.12)}.hotspot-tip{font-family:var(--font-ui);color:#fff;white-space:nowrap;opacity:0;pointer-events:none;background:#111c;border-radius:4px;padding:3px 7px;font-size:11px;font-weight:600;line-height:1.2;transition:opacity .12s,transform .12s;transform:translate(-2px)}.hotspot.is-active .hotspot-tip{opacity:1;transform:translate(0)}.loading,.fallback{text-align:center;min-height:100%;font-family:var(--font-body);place-content:center;gap:14px;padding:24px;display:grid}.loading-orb{background:radial-gradient(circle at 30% 30%, var(--sky-blue), var(--orange) 55%, var(--primary-blue) 72%);border-radius:50%;width:56px;height:56px;margin:0 auto;animation:2.4s ease-in-out infinite breathe}@keyframes breathe{0%,to{transform:scale(.88)}50%{transform:scale(1.08)}}.hud-bottom-left{pointer-events:auto;left:calc(16px + var(--safe-left));bottom:calc(16px + var(--safe-bottom));z-index:2;flex-wrap:wrap;align-items:center;gap:10px;display:flex;position:absolute}.start-activity-btn{min-width:128px;text-decoration:none}a.tv-btn{text-decoration:none}.activity-shell .activity-hud{pointer-events:none;padding:16px 16px calc(16px + var(--safe-bottom));flex-direction:column;gap:10px;display:flex;position:absolute;inset:0}.activity-shell .hud-top,.activity-shell .hud-bottom-left,.activity-shell .brand-mark-corner,.activity-shell .materials-tray,.activity-shell .step-panel{pointer-events:auto}.activity-shell .experience-title{padding:0 12px}.materials-tray,.step-panel{pointer-events:auto}.materials-tray{left:calc(12px + var(--safe-left));top:calc(72px + var(--safe-top));background:var(--bg-panel);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid #dbdee61f;border-radius:14px;width:min(220px,42vw);max-height:calc(100% - 140px);padding:12px;position:absolute;overflow:auto}.materials-tray h2{letter-spacing:.08em;text-transform:uppercase;color:var(--grey);margin:0 0 10px;font-size:.72rem;font-weight:700}.materials-tray ul{gap:6px;margin:0;padding:0;list-style:none;display:grid}.material-item{appearance:none;text-align:left;width:100%;color:var(--white);cursor:pointer;background:#ffffff08;border:1px solid #ffffff0f;border-radius:10px;align-items:flex-start;gap:8px;padding:8px;display:flex}.material-item strong{font-size:.78rem;display:block}.material-item small{color:var(--grey);margin-top:2px;font-size:.68rem;display:block}.material-item.is-done{border-color:#00aea473}.material-item.is-selected{border-color:var(--orange);background:#f6921e1f}.material-check{border:1px solid var(--grey);width:18px;height:18px;color:var(--green-1);border-radius:50%;flex-shrink:0;place-items:center;font-size:.65rem;display:grid}.material-item.is-done .material-check{border-color:var(--green-1);background:#00aea433}.step-panel{right:calc(12px + var(--safe-right));top:calc(72px + var(--safe-top));scrollbar-gutter:stable;scrollbar-width:thin;scrollbar-color:#f6921eb3 transparent;background:#12182b;border:1px solid #ffffff14;border-radius:12px;flex-direction:column;gap:12px;width:min(300px,88vw);height:auto;max-height:min(440px,100% - 160px);padding:16px 10px 14px 16px;display:flex;position:absolute;overflow:hidden auto}.step-panel::-webkit-scrollbar{width:3px;height:20px}.step-panel::-webkit-scrollbar-track{background:#ffffff0a;border-radius:999px;margin:10px 0}.step-panel::-webkit-scrollbar-thumb{background:#f6921ebf;border-radius:999px;height:20px;min-height:20px;max-height:20px}.step-panel::-webkit-scrollbar-thumb:hover{background:var(--orange)}.step-panel::-webkit-scrollbar-corner{background:0 0}.step-panel-top{justify-content:space-between;align-items:flex-start;gap:10px;display:flex}.step-title{font-family:var(--font-ui);color:var(--white);letter-spacing:-.02em;flex:1;margin:0;font-size:1.05rem;font-weight:700;line-height:1.25}.step-reset-icon{appearance:none;color:#dbdee6d9;cursor:pointer;background:0 0;border:none;border-radius:6px;flex-shrink:0;place-items:center;width:28px;height:28px;margin:0;padding:0;display:grid}.step-reset-icon:hover{color:var(--white);background:#ffffff0f}.step-progress-row{align-items:center;gap:10px;display:flex}.step-progress-track{background:#ffffff1a;border-radius:999px;flex:1;height:6px;overflow:hidden}.step-progress-fill{border-radius:inherit;background:var(--orange);height:100%;transition:width .2s}.step-progress-count{font-family:var(--font-ui);color:#dbdee6b3;letter-spacing:.02em;flex-shrink:0;font-size:.75rem;font-weight:600}.step-instruction{color:#dbdee6b8;margin:0;font-size:.8rem;line-height:1.45}.step-card{background:#ffffff08;border:1px solid #ffffff1a;border-radius:10px;padding:14px}.step-card h3{font-family:var(--font-ui);color:var(--white);margin:0 0 6px;font-size:.95rem;font-weight:700}.step-card p{color:#dbdee6e0;margin:0;font-size:.8rem;line-height:1.45}.step-card-empty{color:#dbdee68c!important}.step-card-represents{align-items:center;gap:8px;font-weight:600;display:flex;color:var(--orange)!important;margin-top:10px!important;font-size:.8rem!important}.step-check{border:1.5px solid var(--orange);width:18px;height:18px;color:var(--orange);border-radius:50%;flex-shrink:0;place-items:center;display:grid}.step-feedback{color:var(--black-smoke);background:#f6921e1a;border:1px solid #f6921e47;border-radius:10px;margin:0;padding:10px 12px;font-size:.78rem;line-height:1.4}.step-nav{justify-content:space-between;align-items:center;gap:12px;margin-top:auto;padding-top:4px;display:flex}.step-nav-btn{appearance:none;color:#dbdee6d9;cursor:pointer;background:0 0;border:1px solid #ffffff24;border-radius:10px;place-items:center;width:40px;height:40px;transition:background .12s,color .12s,border-color .12s;display:grid}.step-nav-btn:hover:not(:disabled){color:var(--white);background:#ffffff0f}.step-nav-btn.is-primary{background:var(--orange);color:var(--white);border-color:#0000}.step-nav-btn.is-primary:hover:not(:disabled){filter:brightness(1.06);background:var(--orange);color:var(--white)}.step-nav-btn:disabled{opacity:.35;cursor:not-allowed}.step-nav-spacer{width:40px;height:40px}.step-hint{color:var(--grey);margin:6px 0 0;font-size:.75rem}.breath-controls{gap:6px;display:grid}.lab-chip{color:#fff;font-family:var(--font-ui);white-space:nowrap;cursor:pointer;background:#111111d1;border:none;border-radius:4px;align-items:center;padding:2px 6px;font-size:10px;font-weight:600;line-height:1.2;display:inline-flex;transform:scale(1)}.lab-chip.is-done{box-shadow:inset 0 0 0 1px var(--orange);opacity:.95}.lab-chip.is-selected{box-shadow:inset 0 0 0 1px var(--orange)}.lab-inline-btn{pointer-events:auto}.lab-scene-hint{color:var(--black-smoke);background:#111111bf;border-radius:8px;margin:0;padding:6px 10px;font-size:.78rem}.chest-cavity-label{font-family:var(--font-ui);letter-spacing:.04em;color:#fff;white-space:nowrap;pointer-events:none;background:#111111b8;border:1px solid #02bfdf59;border-radius:4px;padding:3px 8px;font-size:11px;font-weight:600}.lab-breath-label{text-align:center;background:#12182beb;border:1px solid #02bfdf59;border-radius:10px;gap:2px;min-width:140px;padding:8px 10px;display:grid}.lab-breath-label--pipe{pointer-events:none;min-width:0;padding:6px 8px}.lab-breath-phase{font-family:var(--font-ui);color:var(--orange);font-size:.85rem;font-weight:800}.lab-breath-hint{color:var(--black-smoke);font-size:.68rem}.lab-breath-arrows{color:var(--sky-blue);letter-spacing:.15em;font-size:.9rem}.predict-panel{gap:8px;display:grid}.predict-tools,.predict-labels{flex-wrap:wrap;gap:6px;max-width:100%;display:flex;overflow:visible}.predict-tool-btn{appearance:none;color:#ebfafff2;cursor:pointer;background:#ffffff0d;border:1px solid #ffffff1f;border-radius:10px;place-items:center;width:40px;height:40px;margin:0;padding:0;transition:background .12s,border-color .12s,color .12s;display:grid}.predict-tool-btn svg{flex-shrink:0;display:block}.predict-tool-btn:hover{color:var(--white);background:#ffffff1a}.predict-tool-btn.is-active{border-color:var(--orange);color:var(--orange);background:#f6921e33}.predict-canvas{touch-action:none;cursor:crosshair;background:#1a2230;border:1px solid #ffffff1a;border-radius:12px;width:100%;height:180px}.predict-note{color:var(--grey);margin:0;font-size:.72rem}.reflect-panel{gap:12px;display:grid}.reflect-intro{color:var(--black-smoke);margin:0;font-size:.82rem;line-height:1.45}.reflect-q{gap:6px;display:grid}.reflect-q label{font-size:.8rem;font-weight:600;line-height:1.35}.reflect-q textarea{resize:vertical;width:100%;color:var(--white);font-family:var(--font-body);background:#00000040;border:1px solid #ffffff1f;border-radius:10px;padding:8px 10px;font-size:.8rem}.reflect-hint{color:var(--green-1);margin:0;font-size:.75rem;line-height:1.4}.reflect-compare h3{margin:0 0 8px;font-size:.85rem}.reflect-compare img{border:1px solid #ffffff1a;border-radius:10px;width:100%}.reflect-compare p{color:var(--black-smoke);margin:8px 0 0;font-size:.78rem;line-height:1.4}.reflect-footer{flex-wrap:wrap;gap:8px;display:flex}@media (width<=900px){.materials-tray{width:min(200px,36vw);max-height:40vh}.step-panel{width:min(280px,46vw);max-height:min(380px,100% - 140px)}}@media (width<=640px){.materials-tray{width:auto;max-height:18vh;inset:auto 8px calc(34vh + 8px)}.step-panel{top:auto;left:8px;right:8px;bottom:calc(64px + var(--safe-bottom));width:auto;max-height:32vh}.hud-bottom-left{bottom:calc(72px + var(--safe-bottom))}}@media (width<=420px){.brand-logo{height:28px}.brand-mark-corner{width:44px}.experience-title{top:calc(56px + var(--safe-top));font-size:1.25rem}.phase-rail{gap:8px;margin:10px 0;padding:10px 0}.tv-btn{border-radius:10px;min-width:84px;min-height:32px;padding:6px 12px;font-size:.72rem}}.html-lab-shell{background:var(--primary-blue);width:100%;height:100%;position:relative;overflow:hidden}.html-lab-frame{background:var(--primary-blue);border:0;width:100%;height:100%;display:block}.html-lab-back{top:calc(12px + var(--safe-top));left:calc(12px + var(--safe-left));z-index:5;min-width:auto;padding:8px 14px;font-size:.78rem;text-decoration:none;position:absolute;box-shadow:0 4px 14px #00000059}.home-shell{-webkit-overflow-scrolling:touch;width:100%;height:100%;color:var(--white);position:relative;overflow:auto}.home-shell .brand-mark-corner{z-index:2;position:fixed}.home-bg{z-index:0;pointer-events:none;background:radial-gradient(80% 55% at 50% -10%,#02bfdf2e,#0000 55%),radial-gradient(60% 40% at 100% 80%,#f6921e1f,#0000 50%),linear-gradient(165deg,#0e1424 0%,#12182b 45%,#1a2238 100%);position:fixed;inset:0}.home-header{z-index:1;padding:calc(36px + var(--safe-top)) 24px 22px;justify-content:center;align-items:center;display:flex;position:relative}.home-logo{object-fit:contain;width:auto;max-width:min(280px,80vw);height:42px}.home-main{z-index:1;width:100%;max-width:none;padding:8px 28px calc(40px + var(--safe-bottom));text-align:left;margin:0;position:relative}.home-tagline{font-family:var(--font-ui);letter-spacing:-.02em;color:var(--white);text-align:left;margin:0 0 18px;font-size:1.35rem;font-weight:700}.activity-grid{grid-template-columns:repeat(auto-fill,minmax(320px,360px));justify-content:start;gap:24px;margin:0;padding:0;list-style:none;display:grid}.activity-card{width:100%;max-width:360px;height:100%;color:inherit;background:#12182be0;border:1px solid #ffffff1a;border-radius:16px;flex-direction:column;text-decoration:none;transition:transform .16s,border-color .16s,box-shadow .16s;display:flex;overflow:hidden}.activity-card:hover,.activity-card:focus-visible{border-color:#f6921e8c;outline:none;transform:translateY(-3px);box-shadow:0 12px 28px #00000059}.activity-card:active{transform:translateY(-1px)}.activity-card-media{aspect-ratio:16/10;background:#1a2230;overflow:hidden}.activity-card-media img{object-fit:cover;object-position:center;width:100%;height:100%;display:block}.activity-card-body{flex-direction:column;gap:8px;padding:16px 18px 18px;display:flex}.activity-card-title{font-family:var(--font-ui);letter-spacing:-.02em;color:var(--white);margin:0;font-size:1.2rem;font-weight:700}.activity-card-desc{color:#dbdee6bf;margin:0;font-size:.84rem;line-height:1.45}@media (width<=520px){.home-logo{height:34px}.home-header{padding-top:calc(28px + var(--safe-top))}.home-main{padding-left:18px;padding-right:18px}.home-tagline{font-size:1.15rem}.activity-grid{grid-template-columns:1fr;gap:16px}.activity-card{max-width:none}}