:root{color-scheme:dark;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--bg:#0b1420;--panel:#111f2e;--line:#253747;--text:#edf4f6;--muted:#a3b6c5;--cyan:#91e3d1;--gold:#f0cb89;--blue:#8dbaf2}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;color:var(--text);background:radial-gradient(ellipse at 75% 0,#1b394645,transparent 45%),var(--bg)}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit}button:disabled{opacity:.45;cursor:default}[hidden]{display:none!important}:focus-visible{outline:3px solid var(--gold);outline-offset:5px}button{touch-action:manipulation}button,a{transition:background .18s,border-color .18s,color .18s}.skip{position:absolute;left:20px;top:-80px;z-index:20;background:var(--cyan);color:var(--bg);padding:12px 20px;border-radius:8px}.skip:focus{top:12px}
.app-header{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:88px;padding:18px clamp(20px,4vw,64px);border-bottom:1px solid var(--line);background:#0b1420bb}.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none}.brand-mark{display:grid;place-items:center;width:45px;height:45px;border:1px solid #91e3d154;border-radius:14px;background:#91e3d112;color:var(--cyan);font:italic 34px Georgia,serif}.brand strong{display:block;font:500 22px Georgia,serif;letter-spacing:-.7px}.brand strong span{color:var(--cyan)}.brand small{display:block;color:var(--muted);font-size:8px;letter-spacing:1.65px;margin-top:6px}.header-note{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted)}.status-dot{width:6px;height:6px;background:var(--cyan);border-radius:50%}.header-actions{display:flex;align-items:center;gap:24px}.button,.icon-button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:11px 16px;border:1px solid var(--line);border-radius:8px;background:#91e3d10b;color:var(--cyan);font-size:12px;font-weight:650;text-decoration:none}.button:hover,.icon-button:hover{border-color:var(--cyan);background:#91e3d11c}.button--quiet{background:transparent;color:var(--text)}.back-link{font-size:11px;text-decoration:none;color:var(--muted)}.back-link span{margin-left:8px;color:var(--cyan)}.app-main{max-width:1512px;margin:0 auto;padding:44px clamp(20px,4vw,64px) 0}.intro{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:34px}.eyebrow{font-size:9px;font-weight:750;letter-spacing:1.8px;color:var(--cyan);line-height:1.6}.intro h1{margin:11px 0 10px;font:400 clamp(28px,3.2vw,45px)/1.14 Georgia,serif;letter-spacing:-1.3px}.intro h1 em{color:var(--cyan);font-weight:400}.intro p:not(.eyebrow){margin:0;color:var(--muted);font-size:13px;line-height:1.7}.intro-aside{display:flex;align-items:center;gap:13px;margin-right:4px}.intro-aside strong{font:400 55px Georgia,serif;color:var(--gold)}.intro-aside span{color:var(--muted);font-size:11px;line-height:1.7}
.lab-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:24px}.lab-button{position:relative;display:flex;align-items:center;gap:12px;text-align:left;min-height:83px;padding:16px;border:1px solid var(--line);border-radius:12px;color:var(--muted);background:#101e2acc}.lab-button:hover{border-color:#91e3d16b;background:#162936}.lab-button.is-active{color:var(--text);border-color:#91e3d186;background:linear-gradient(110deg,#21443f80,#122631);box-shadow:inset 0 -2px var(--cyan)}.lab-number{align-self:flex-start;margin-top:3px;color:#8ea4b5;font-size:9px;font-variant-numeric:tabular-nums}.lab-icon{color:var(--cyan);font-size:29px;line-height:1}.lab-button strong{display:block;font:500 16px Georgia,serif}.lab-button small{display:block;color:var(--muted);font-size:9px;margin-top:6px}.lab-arrow{margin-left:auto;align-self:flex-start;color:var(--cyan);font-size:15px}.workspace{display:grid;grid-template-columns:275px minmax(0,1fr);gap:22px;align-items:start}.controls{padding:23px;border:1px solid var(--line);border-radius:14px;background:linear-gradient(150deg,#142432,#101c29)}.controls-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.control-mark{font-size:24px;color:var(--muted)}.controls h2{font:400 26px/1.2 Georgia,serif;letter-spacing:-.6px;margin:0 0 12px}.control-copy{font-size:11px;color:var(--muted);line-height:1.8;margin:0 0 24px}.field{margin:23px 0}.field label{display:flex;justify-content:space-between;align-items:center;gap:8px;color:#c3d1dc;font-size:11px;font-weight:550;margin-bottom:12px}.field output{color:var(--cyan);font-size:11px;font-weight:700;white-space:nowrap;font-variant-numeric:tabular-nums}input[type=range]{display:block;width:100%;height:24px;margin:0;accent-color:var(--cyan);cursor:pointer}select{min-height:43px;padding:9px 30px 9px 11px;border:1px solid #354b5c;border-radius:7px;background:#0d1a26;color:var(--text);font-size:11px}.field select{width:100%}.range-ends{display:flex;justify-content:space-between;color:#94aaba;font-size:9px;margin-top:7px}.reset-settings{width:100%;display:flex;justify-content:center;align-items:center;gap:8px;padding:18px 0 0;margin-top:23px;border:0;border-top:1px solid var(--line);color:var(--muted);background:transparent;font-size:11px;min-height:44px}.reset-settings:hover{color:var(--cyan)}.control-note{display:flex;gap:12px;padding:14px;margin-top:26px;border:1px solid #f0cb8933;border-radius:8px;background:#f0cb8908;color:#d2c4aa;font-size:11px;line-height:1.7}.control-note>span{font-size:21px;color:var(--gold)}.control-footnote{margin-top:18px;margin-bottom:0;font-size:10px}.switch-button{display:flex;align-items:center;gap:12px;width:100%;padding:13px 9px;border:1px solid var(--line);border-radius:8px;background:#0d1a26;color:var(--text);font-size:11px}.switch-track{position:relative;width:34px;height:20px;border-radius:20px;background:#465664}.switch-track:after{content:"";position:absolute;left:3px;top:3px;width:14px;height:14px;background:#dae7ef;border-radius:50%}.switch-button[aria-pressed=true] .switch-track{background:var(--cyan)}.switch-button[aria-pressed=true] .switch-track:after{left:17px;background:#12272b}.lens-legend{display:grid;gap:13px;font-size:10px;color:var(--muted);margin:24px 0}.lens-legend span{display:flex;align-items:center;gap:8px}.legend-line{display:inline-block;width:19px;height:0;vertical-align:middle;border-top:2px solid var(--cyan)}.legend-line--dash{border-top:2px dashed var(--gold)}
.experiment{display:grid;gap:16px;min-width:0}.stage-card{overflow:hidden;border:1px solid var(--line);border-radius:14px;background:#0e1c29}.stage-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:18px 22px;border-bottom:1px solid var(--line)}.stage-heading h2{margin:5px 0 0;font:400 19px Georgia,serif}.stage-heading .eyebrow{font-size:8px;letter-spacing:1.5px}.stage-heading .icon-button{padding:7px 11px;font-size:10px;min-width:57px}.scene-wrap{position:relative;background:radial-gradient(ellipse at 50% 40%,#1d3c493d,transparent 65%),#0c1925}.scene-wrap canvas{display:block;width:100%;height:360px}.scene-badge,.scene-coordinate{position:absolute;top:19px;left:21px;font:9px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:1.1px;color:var(--muted);pointer-events:none}.scene-badge{display:flex;align-items:center;gap:7px}.scene-badge>span{width:5px;height:5px;border-radius:50%;background:var(--gold)}.scene-badge.is-running{color:var(--cyan)}.scene-badge.is-running>span{background:var(--cyan);box-shadow:0 0 10px #91e3d155}.scene-coordinate{left:auto;right:21px;letter-spacing:.5px}.transport{display:flex;align-items:center;gap:18px;min-height:69px;padding:12px 20px;border-top:1px solid var(--line);background:#111f2e}.transport-actions{display:flex;gap:7px;align-items:center}.play-button{display:inline-flex;gap:9px;align-items:center;justify-content:center;min-width:108px;min-height:42px;padding:10px 14px;border:1px solid var(--cyan);border-radius:7px;background:var(--cyan);color:#0b2627;font-size:11px;font-weight:750}.play-button:hover{background:#b4f3e3}.transport .icon-button{width:39px;min-width:39px;min-height:42px;padding:8px;font-size:21px}.speed-label{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:10px}.speed-label select{min-height:37px;font-size:10px;padding:7px}.transport-hint{margin-left:auto;font-size:10px;color:var(--muted)}.time-control{padding:4px 22px 15px;background:#111f2e}.time-control label{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;margin:1px 0 5px}.time-control output{font-variant-numeric:tabular-nums;color:var(--cyan)}.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:0;border:1px solid var(--line);border-radius:12px;background:#12212e}.metrics>div{min-width:0;padding:17px 18px}.metrics>div+div{border-left:1px solid var(--line)}.metrics dt{color:var(--muted);font-size:10px;line-height:1.5;margin-bottom:9px}.metrics dd{margin:0;font:400 clamp(17px,1.75vw,25px) Georgia,serif;letter-spacing:-.5px;color:var(--cyan);overflow-wrap:anywhere}.metrics>div:nth-child(3) dd,.metrics>div:nth-child(4) dd{color:var(--gold)}.graph-card{overflow:hidden;border:1px solid var(--line);border-radius:12px;background:#0e1c29;padding:21px 22px 15px}.graph-heading{display:flex;align-items:center;justify-content:space-between;gap:14px}.graph-heading h2{margin:6px 0 0;font:400 19px Georgia,serif}.graph-heading .eyebrow{font-size:8px;letter-spacing:1.3px}.graph-key{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:10px;white-space:nowrap}.graph-card canvas{display:block;width:100%;height:180px;margin-top:12px}.graph-caption{margin:7px 0 0;color:var(--muted);font-size:10px;line-height:1.7}
.learning{display:grid;grid-template-columns:1.3fr 1fr;gap:22px;margin-top:25px}.explanation,.challenge{border:1px solid var(--line);border-radius:12px;padding:25px 28px;background:#111f2e}.explanation h2,.challenge h2{margin:10px 0 13px;font:400 24px/1.2 Georgia,serif;letter-spacing:-.4px}.explanation p,.challenge p{margin:0;color:var(--muted);font-size:12px;line-height:1.85}.formula{display:inline-block;margin:18px 0 12px;padding:10px 18px;border-left:2px solid var(--cyan);background:#91e3d10b;color:var(--cyan);font:400 21px Georgia,serif}.explanation .model-note{font-size:10px}.challenge{background:radial-gradient(ellipse at 100% 0,#9178441c,transparent 80%),#17242c;border-color:#f0cb8938}.challenge .eyebrow{color:var(--gold)}.challenge-heading{display:flex;align-items:center;justify-content:space-between;color:var(--gold);font-size:21px}.challenge .button{margin-top:22px;color:var(--gold);border-color:#f0cb8959;background:#f0cb8908}.challenge .button:hover{background:#f0cb891a;border-color:var(--gold)}.app-status{min-height:18px;margin:20px 0;color:var(--cyan);font-size:11px;line-height:1.6}.app-footer{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:23px 0 26px;border-top:1px solid var(--line);color:var(--muted);font-size:9px;line-height:1.8}.app-footer>div{display:flex;gap:19px;flex-wrap:wrap}.app-footer a{text-decoration:none}.app-footer a:hover{color:var(--cyan)}.no-script{padding:20px;border:1px solid var(--gold);color:var(--gold)}
.guide-card{margin:0 0 24px;border:1px solid #91e3d13d;border-radius:12px;background:linear-gradient(110deg,#142c32,#12202c)}.guide-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 24px}.guide-header h2{margin:7px 0 0;font:400 22px/1.3 Georgia,serif}.guide-header .button{flex-shrink:0}.guide-card #physics-guide-body{padding:0 24px 20px;border-top:1px solid #91e3d123}.guide-progress-heading{display:flex;justify-content:space-between;align-items:center;gap:15px}.guide-progress-heading p{margin:0;color:var(--muted);font-size:11px}.guide-progress-heading strong{color:var(--cyan);font-variant-numeric:tabular-nums;margin-right:7px}.guide-reset{min-height:44px;border:0;padding:9px 0 9px 10px;background:none;color:var(--muted);font-size:10px}.guide-reset:hover{color:var(--text)}.guide-stops{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;list-style:none;padding:0;margin:0 0 20px}.guide-stops button{display:flex;align-items:center;gap:10px;width:100%;min-height:44px;padding:10px 14px;border:1px solid var(--line);border-radius:7px;background:#0b192980;color:var(--muted);font-size:11px}.guide-stops button>span{font-size:10px;color:var(--cyan)}.guide-stops button[aria-current=step]{border-color:var(--cyan);color:var(--text)}.guide-stops button[data-complete=true]>span{font-size:14px;color:var(--gold)}.guide-content{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(240px,1fr);gap:28px;align-items:start}.guide-content h3{margin:8px 0 10px;font:400 27px/1.2 Georgia,serif;letter-spacing:-.5px}.guide-content p{margin:0;color:var(--muted);font-size:12px;line-height:1.85}.guide-target-box{padding:16px 18px;border:1px solid #f0cb8930;border-radius:9px;background:#f0cb8905}.guide-target-box>.eyebrow{color:var(--gold)}.guide-target-box>p{margin:7px 0 0;color:var(--text);font-size:13px}.guide-target-box details{margin-top:12px;border-top:1px solid var(--line);padding-top:10px}.guide-target-box summary{min-height:28px;padding:3px 0;cursor:pointer;color:var(--gold);font-size:11px}.guide-target-box details p{margin-top:8px;font-size:11px}.guide-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:20px}.guide-check{background:var(--cyan);color:#0b2627;border-color:var(--cyan)}.guide-check:hover{background:#b4f3e3;color:#0b2627}.guide-next{display:flex;align-items:center;gap:16px;min-height:44px;margin-left:auto;border:0;background:none;color:var(--cyan);font-size:11px}.guide-feedback{min-height:20px;margin:15px 0 0;color:var(--muted);font-size:12px;line-height:1.8}.guide-feedback[data-state=success],.guide-inline-feedback[data-state=success]{color:var(--cyan)}.guide-feedback[data-state=adjust],.guide-inline-feedback[data-state=adjust]{color:var(--gold)}.guide-storage-note{margin:9px 0 0;color:var(--muted);font-size:9px;line-height:1.7}.guide-control-check{margin-top:22px;padding:16px;border:1px solid #91e3d13d;border-radius:9px;background:#91e3d108}.guide-control-check>p{margin:8px 0 12px;color:var(--text);font-size:11px;line-height:1.8}.guide-control-check>.button{width:100%;padding:10px 8px;font-size:10px}.guide-control-check>.guide-inline-feedback{margin:11px 0 0;font-size:10px;color:var(--muted)}
@media(max-width:760px){.guide-card{margin-bottom:16px}.guide-header{padding:18px;align-items:flex-start;flex-direction:column;gap:14px}.guide-header h2{font-size:23px}.guide-header .button{width:100%}.guide-card #physics-guide-body{padding:0 18px 18px}.guide-progress-heading{gap:8px}.guide-progress-heading p,.guide-reset{font-size:9px}.guide-stops{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin-bottom:18px}.guide-stops button{font-size:10px;padding:10px}.guide-content{grid-template-columns:1fr;gap:18px}.guide-content h3{font-size:25px}.guide-content p{font-size:11px}.guide-target-box{padding:15px}.guide-actions{gap:8px}.guide-actions>.button{width:100%;font-size:11px}.guide-next{margin-left:0;justify-content:center;width:100%;padding:10px}.guide-feedback{font-size:11px}.guide-control-check{padding:14px}.guide-reset{max-width:105px;text-align:right}.guide-storage-note{font-size:9px}}
@media(min-width:1500px){.scene-wrap canvas{height:410px}.controls{padding:26px}.workspace{grid-template-columns:290px minmax(0,1fr)}}
@media(max-width:1100px){.header-note{display:none}.app-main{padding-top:30px}.workspace{grid-template-columns:240px minmax(0,1fr);gap:16px}.controls{padding:20px}.lab-button{gap:8px;padding:13px}.lab-number{display:none}.lab-icon{font-size:24px}.lab-button strong{font-size:15px}.lab-button small{font-size:8px}.transport-hint{display:none}.metrics>div{padding:15px 11px}.metrics dt{font-size:9px}.scene-wrap canvas{height:330px}.stage-heading{padding:17px}.graph-card{padding:18px}.intro-aside strong{font-size:44px}.learning{gap:16px}.explanation,.challenge{padding:23px}}
@media(max-width:760px){.app-header{min-height:77px;padding:15px 20px;gap:12px}.brand strong{font-size:21px}.brand small{font-size:7px;letter-spacing:1px}.brand-mark{width:38px;height:40px;font-size:29px}.header-actions{gap:10px}.header-actions .button{font-size:10px;padding:8px 12px}.back-link{display:none}.app-main{padding:28px 16px 0}.intro{margin-bottom:25px}.intro h1{font-size:31px;max-width:340px;line-height:1.2}.intro .eyebrow{font-size:8px}.intro p:not(.eyebrow){font-size:11px;max-width:290px}.intro-aside{display:none}.lab-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-bottom:16px}.lab-button{min-height:72px;padding:13px;gap:11px}.lab-button strong{font-size:16px}.lab-button small{font-size:9px}.lab-arrow{font-size:13px}.workspace{display:flex;flex-direction:column;gap:16px}.controls{width:100%;padding:18px 20px}.controls-heading{margin-bottom:10px}.controls h2{font-size:22px}.controls h2 br{display:none}.control-copy{margin-bottom:8px;font-size:11px}.controls section{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 22px;align-items:start}.controls section>h2,.controls section>.control-copy,.controls section>.control-note,.controls section>.lens-legend{grid-column:1/-1}.field{margin:13px 0}.field label{font-size:10px;margin-bottom:7px}.field output{font-size:10px}.field select{padding-right:10px;font-size:10px}.range-ends{display:none}.reset-settings{padding-top:13px;margin-top:14px}.controls .switch-button{align-self:center;min-height:43px;margin-top:20px;font-size:10px}.controls .control-footnote{margin-top:12px}.lens-legend{grid-template-columns:1fr 1fr;margin:15px 0 3px}.experiment{width:100%;gap:12px}.scene-wrap canvas{height:310px}.stage-heading h2{font-size:19px}.stage-heading .eyebrow{font-size:7px}.scene-badge,.scene-coordinate{font-size:8px}.transport{padding:11px 14px;gap:12px;justify-content:space-between}.play-button{min-width:99px}.speed-label{gap:6px}.transport .icon-button{width:36px;min-width:36px}.time-control{padding:3px 17px 13px}.metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.metrics>div{padding:15px 18px}.metrics>div:nth-child(3){border-left:0;border-top:1px solid var(--line)}.metrics>div:nth-child(4){border-top:1px solid var(--line)}.metrics dt{font-size:10px}.metrics dd{font-size:25px}.graph-card{padding:18px 14px 14px}.graph-heading h2{font-size:18px}.graph-key{font-size:9px}.graph-heading .eyebrow{font-size:7px}.graph-card canvas{height:180px}.learning{grid-template-columns:1fr;gap:14px;margin-top:16px}.explanation,.challenge{padding:22px}.explanation h2,.challenge h2{font-size:24px}.app-footer{flex-direction:column;align-items:flex-start;gap:12px}.app-footer>div{gap:9px 18px}.app-status{font-size:10px}.control-note{margin-top:8px}.switch-track{flex-shrink:0}}
@media(max-width:380px){.transport{flex-wrap:wrap}.speed-label{margin-left:auto}.app-header{padding:12px;gap:8px}.brand{gap:8px}.brand-mark{width:32px;height:35px}.brand strong{font-size:18px}.brand small{font-size:6px;letter-spacing:.65px}.header-actions .button{padding:8px;font-size:9px}.lab-button{padding:12px 10px;gap:7px}.lab-button strong{font-size:14px}.lab-button small{font-size:8px}.lab-arrow{display:none}.lab-icon{font-size:22px}.intro h1{font-size:28px}}
@media(max-width:340px){body{min-width:260px}.controls section{grid-template-columns:1fr}.controls h2{font-size:20px}.controls .switch-button{margin-top:7px}.scene-coordinate{right:12px}.graph-key{display:none}.stage-heading h2{font-size:17px}.app-main{padding-left:12px;padding-right:12px}.scene-wrap canvas{height:290px}.metrics>div{padding:13px}.scene-badge{left:14px}}
.notebook-capture{display:flex;align-items:flex-end;gap:14px;padding:17px 20px;border:1px solid var(--line);border-radius:11px;background:#111f2e}.notebook-name-field{flex:1;min-width:0}.notebook-name-field label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px;color:var(--text);font-size:11px}.notebook-name-field label>span{color:var(--muted);font-size:9px}.notebook-name-field input{display:block;width:100%;min-width:0;min-height:43px;padding:10px 12px;border:1px solid #354b5c;border-radius:7px;background:#0b1926;color:var(--text);font-size:12px}.notebook-name-field input::placeholder{color:#95aabb}.notebook-capture>.button{flex-shrink:0;min-height:43px;font-size:11px}.notebook-status{margin:-5px 2px 0;min-height:0;color:var(--cyan);font-size:11px;line-height:1.8}.notebook-status:empty{display:none}.notebook-card{min-width:0;padding:22px;border:1px solid var(--line);border-radius:12px;background:linear-gradient(135deg,#14232f,#101e2b)}.notebook-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.notebook-heading h2{margin:7px 0 8px;font:400 24px/1.2 Georgia,serif;letter-spacing:-.5px}.notebook-heading p{margin:0;font-size:10px;color:var(--cyan)}.notebook-tools{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}.notebook-tools>.button{font-size:10px;min-height:42px;padding:10px 12px}.notebook-clear{min-height:44px;padding:9px 0;border:0;background:none;color:var(--muted);font-size:10px}.notebook-clear:hover:not(:disabled){color:var(--gold)}.notebook-storage-note{margin:15px 0 0;font-size:10px;line-height:1.8;color:var(--muted)}.notebook-empty{display:grid;justify-items:center;text-align:center;gap:10px;padding:30px 18px;margin-top:20px;border:1px dashed #91e3d13b;border-radius:10px;background:#91e3d103}.notebook-empty>span{font:400 28px Georgia,serif;color:var(--cyan)}.notebook-empty p{margin:0;font:400 20px/1.3 Georgia,serif;color:var(--text)}.notebook-empty small{max-width:420px;color:var(--muted);font-size:10px;line-height:1.8}.notebook-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;list-style:none;margin:18px 0 0;padding:0}.notebook-list:empty{display:none}.notebook-entry{min-width:0;padding:15px;border:1px solid #36515c;border-radius:10px;background:#0d1c29}.notebook-entry-heading{display:flex;align-items:center;gap:10px}.notebook-checkbox{display:flex;align-items:center;gap:6px;min-height:44px;color:var(--muted);font-size:9px;cursor:pointer}.notebook-checkbox input{width:16px;height:16px;accent-color:var(--cyan);cursor:pointer}.notebook-entry-name{display:block;width:100%;min-width:0;min-height:39px;padding:6px 8px;border:1px solid transparent;border-radius:5px;background:transparent;color:var(--text);font:400 18px Georgia,serif}.notebook-entry-name:hover,.notebook-entry-name:focus{border-color:#476577;background:#182c3a}.notebook-remove{display:grid;place-items:center;flex-shrink:0;width:36px;min-height:44px;padding:0;border:0;border-radius:6px;background:none;color:var(--muted);font-size:23px}.notebook-remove:hover{color:var(--gold);background:#f0cb8908}.notebook-entry-measures{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:10px 0 17px}.notebook-entry-measures p{margin:0}.notebook-entry-measures span{display:block;color:var(--muted);font-size:9px;line-height:1.6}.notebook-entry-measures strong{display:block;margin-top:5px;color:var(--cyan);font:400 22px/1.2 Georgia,serif;overflow-wrap:anywhere}.notebook-entry-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.notebook-entry-footer>span{font-size:9px;color:var(--muted)}.notebook-resume{min-height:40px;padding:6px 0;border:0;background:transparent;color:var(--cyan);font-size:10px}.notebook-resume:hover{color:#d0fff0}.notebook-details{margin-top:11px;padding-top:12px;border-top:1px solid var(--line)}.notebook-details summary{min-height:30px;color:var(--muted);font-size:10px;line-height:1.8;cursor:pointer}.notebook-details dl{margin:10px 0 3px}.notebook-details dl>div{display:grid;grid-template-columns:1.2fr 1fr;gap:12px;padding:7px 0;border-bottom:1px solid #2537476b;font-size:10px;line-height:1.7}.notebook-details dt{color:var(--muted)}.notebook-details dd{margin:0;color:var(--text);text-align:right;overflow-wrap:anywhere}.notebook-comparison{min-width:0;margin-top:24px;padding-top:22px;border-top:1px solid #91e3d13b}.notebook-comparison h3{margin:7px 0 12px;font:400 25px/1.2 Georgia,serif}.notebook-comparison>p{margin:0 0 18px;color:var(--muted);font-size:11px;line-height:1.8}.notebook-table-region{max-width:100%;min-width:0;overflow-x:auto;margin:15px 0 0;border:1px solid var(--line);border-radius:8px;scrollbar-color:#496776 #101e2b}.notebook-table{width:100%;min-width:570px;border-collapse:collapse;text-align:left;font-size:10px;font-variant-numeric:tabular-nums}.notebook-table caption{text-align:left;padding:14px;color:var(--gold);font-size:11px;font-weight:650}.notebook-table th,.notebook-table td{padding:12px 13px;border-top:1px solid var(--line);line-height:1.7;overflow-wrap:anywhere}.notebook-table thead th{width:25%;background:#192c3a;color:var(--text);font-weight:600}.notebook-table tbody th{color:var(--muted);font-weight:500}.notebook-table td{color:var(--text)}.notebook-table .is-changed{background:#91e3d106}.notebook-table .is-changed td:last-child{color:var(--gold)}
@media(max-width:1100px){.notebook-list{grid-template-columns:1fr}.notebook-heading{align-items:flex-start}.notebook-tools{flex-direction:column;align-items:flex-end;gap:4px}.notebook-capture{flex-direction:column;align-items:stretch;gap:12px}.notebook-capture>.button{width:100%}}
@media(max-width:760px){.notebook-card{padding:18px 14px}.notebook-heading{flex-direction:column;gap:13px}.notebook-heading h2{font-size:24px}.notebook-tools{width:100%;flex-direction:row;justify-content:space-between;align-items:center;gap:10px}.notebook-capture{padding:15px}.notebook-entry{padding:13px}.notebook-entry-heading{gap:7px}.notebook-entry-name{font-size:19px;padding:6px}.notebook-entry-measures strong{font-size:23px}.notebook-storage-note{margin-top:10px}.notebook-empty{padding:24px 15px}.notebook-empty p{font-size:21px}.notebook-status{font-size:10px}.notebook-comparison h3{font-size:24px}.notebook-comparison>p{font-size:10px}.notebook-checkbox{font-size:9px}.notebook-details dl>div{font-size:10px}.notebook-resume{min-height:44px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* The laboratory occupies one screen. Long resources live in their own panels. */
html,body{width:100%;height:100%;min-height:0;overflow:hidden;overscroll-behavior:none}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.compact-views{display:none}
body{min-width:0;background:radial-gradient(ellipse at 75% -10%,#2144446b,transparent 48%),#0b1420}
.physics-app{height:100vh;height:100dvh;min-height:0;display:grid;grid-template-rows:66px minmax(0,1fr);overflow:hidden}
.app-header{min-width:0;min-height:0;padding:10px 24px;gap:16px;background:#0b1520dd}
.brand{gap:10px;flex-shrink:0}.brand-mark{width:38px;height:38px;border-radius:11px;font-size:30px}
.brand strong{font-size:23px}.brand small{font-size:6px;letter-spacing:1.5px;margin-top:4px}
.header-note{gap:8px;font-size:8px;letter-spacing:1px;white-space:nowrap}.header-note-separator{padding:0 8px;color:#41616e}
.header-actions{gap:18px}.header-actions .button{min-height:36px;padding:7px 12px;font-size:10px}.back-link{font-size:10px}
.app-main{display:grid;grid-template-rows:60px minmax(0,1fr) 40px;gap:12px;min-width:0;min-height:0;width:100%;max-width:1800px;padding:14px 24px 10px;overflow:hidden}
.intro,.app-main>.guide-card,.experiment>.notebook-card,.app-main>.learning,.app-main>.app-footer{display:none}
.lab-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;margin:0;min-width:0;min-height:0}
.lab-button{display:flex;align-items:center;min-width:0;min-height:0;padding:10px 15px;gap:13px;border:1px solid #2c3e4a;border-radius:10px;background:#14233194;position:relative;text-align:left;color:var(--muted)}
.lab-button:hover{background:#1c3440;border-color:#65877e}.lab-button.is-active{background:linear-gradient(120deg,#22463e,#173330);border-color:#91e3d16b;box-shadow:inset 3px 0 var(--cyan)}
.lab-button .lab-number{font:400 9px ui-monospace,SFMono-Regular,Consolas,monospace;color:#79949e}.lab-button.is-active .lab-number{color:var(--cyan)}
.lab-icon{font-size:27px;color:var(--cyan);line-height:1;min-width:26px;text-align:center}.lab-button strong{display:block;font-size:13px;font-weight:650;letter-spacing:-.1px;color:var(--text)}
.lab-button small{display:block;font-size:9px;margin-top:5px;white-space:nowrap;color:var(--muted)}.lab-arrow{margin-left:auto;font-size:15px;color:#6b8e96}
.workspace{display:grid;grid-template-columns:272px minmax(0,1fr);gap:14px;min-height:0;min-width:0;align-items:stretch;margin:0}
.controls{min-width:0;min-height:0;max-height:100%;overflow-y:auto;overflow-x:hidden;padding:18px 18px 14px;scrollbar-gutter:stable;border:1px solid #30434d;border-radius:12px;background:linear-gradient(165deg,#182a37,#101f2b);scrollbar-width:thin;scrollbar-color:#42616b #101f2b;overscroll-behavior:contain}
.controls-heading{display:flex;align-items:center;justify-content:space-between;margin:0 0 14px}.controls-heading .eyebrow{font-size:8px;letter-spacing:1.8px}.control-mark{font-size:18px;color:var(--cyan)}
.controls section{display:block}.controls h2{margin:0 0 10px;font:400 27px/1.13 Georgia,serif;letter-spacing:-.7px}.control-copy{font-size:10px;line-height:1.7;margin:0 0 20px;color:var(--muted)}
.field{margin-top:19px}.field label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:9px;font-size:10px;font-weight:550}.field output{color:var(--cyan);font-size:10px;white-space:nowrap}
.field input[type=range],.time-control input[type=range]{display:block;width:100%;min-height:20px;margin:0;accent-color:var(--cyan);cursor:pointer}
.field select{width:100%;min-height:38px;padding:8px 10px;border:1px solid #3c5661;border-radius:7px;color:var(--text);background:#112430;font-size:10px}
.range-ends{display:flex;justify-content:space-between;margin-top:5px;font-size:8px;color:#7d97a5}.reset-settings{min-height:40px;padding-top:14px;margin-top:18px;font-size:10px}.controls .switch-button{min-height:42px;font-size:10px;margin-top:20px}
.controls .control-footnote{margin:12px 0 0;font-size:9px;line-height:1.7}.control-note{padding:12px;margin-top:17px;font-size:10px;line-height:1.7}.lens-legend{margin-top:18px;gap:9px;font-size:9px;grid-template-columns:1fr}
.experiment{position:relative;display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:minmax(220px,1fr) 56px 40px minmax(150px,.57fr);gap:8px;min-width:0;min-height:0;width:100%;height:100%}
.stage-card{display:grid;grid-template-rows:46px minmax(0,1fr) 45px 35px;min-width:0;min-height:0;overflow:hidden;border:1px solid #30434d;border-radius:12px;background:#0c1925}
.stage-heading{padding:9px 18px;gap:12px;min-width:0;min-height:0;background:#132330b3;border-bottom:1px solid #263d49}
.stage-heading .eyebrow{font-size:7px;letter-spacing:1.4px;line-height:1.2}.stage-heading h2{font-size:19px;line-height:1.2;margin:4px 0 0}.stage-heading .icon-button{padding:5px 9px;min-height:30px;font-size:9px;border-color:#3d5460}
.scene-wrap{position:relative;min-height:0;width:100%;overflow:hidden}.scene-wrap canvas{display:block;width:100%;height:100%;min-height:0;max-width:100%}.scene-badge,.scene-coordinate{position:absolute;bottom:13px;top:auto;pointer-events:none;font-size:8px}.scene-badge{left:16px;padding:6px 9px;background:#0b1823cf;border:1px solid #29434b;border-radius:20px}.scene-coordinate{right:16px;color:var(--muted);background:#0b1823ad;padding:6px 8px;border-radius:4px}
.transport{display:flex;align-items:center;gap:15px;min-width:0;min-height:0;padding:6px 16px;border-top:1px solid #243b46;background:#11212d}.transport-actions{display:flex;align-items:center;gap:7px}.play-button{min-width:94px;min-height:32px;padding:6px 12px;border-radius:6px;font-size:10px}.transport .icon-button{min-height:32px;min-width:31px;width:31px;padding:4px;font-size:16px}.speed-label{margin-left:auto;gap:8px;font-size:9px}.speed-label select{min-height:29px;font-size:9px;background:#182b38}.transport-hint{margin:0;font-size:9px;white-space:nowrap;color:var(--muted)}
.time-control{min-height:0;padding:0 17px 6px;border:0;background:#11212d}.time-control label{display:flex;justify-content:space-between;align-items:center;margin:0;font-size:8px;color:var(--muted)}.time-control output{font-size:8px;color:var(--cyan)}.time-control input[type=range]{min-height:16px;height:16px;margin-top:0}
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;min-width:0;min-height:0;margin:0;border:1px solid #314650;border-radius:9px;overflow:hidden;background:linear-gradient(110deg,#1b303b,#11232e)}
.metrics>div{display:flex;flex-direction:column;justify-content:center;min-width:0;padding:8px 15px;border-left:1px solid #314650;border-top:0}.metrics>div:first-child{border:0}.metrics dt{font-size:8px;line-height:1.25;white-space:normal;color:#b4c6ce}.metrics dd{margin:4px 0 0;font:400 23px/1.1 Georgia,serif;letter-spacing:-.6px;color:var(--cyan);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.notebook-capture{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:0;padding:0 3px;border:0;background:transparent;border-radius:0;margin:0}.notebook-name-field{display:flex;align-items:center;gap:10px;min-width:0;flex:1}.notebook-name-field label{margin:0;font-size:9px;white-space:nowrap;color:var(--muted)}.notebook-name-field label span{display:none}.notebook-name-field input{flex:1;width:100%;min-width:0;max-width:290px;min-height:33px;padding:7px 10px;border:1px solid #30454f;background:#13232f;border-radius:6px;font-size:10px;color:var(--text)}.notebook-capture>.button{width:auto;min-height:33px;padding:7px 11px;font-size:9px;white-space:nowrap}
.experiment>.notebook-status{position:absolute;z-index:8;right:12px;bottom:8px;width:auto;max-width:calc(100% - 24px);margin:0;padding:9px 13px;border:1px solid #456b66;border-radius:8px;background:#15332eeF;color:var(--cyan);font-size:10px;box-shadow:0 6px 24px #0005;pointer-events:none}.experiment>.notebook-status:empty{display:none}
.graph-card{display:grid;grid-template-rows:34px minmax(0,1fr);padding:9px 14px 7px;min-height:0;min-width:0;border:1px solid #30434d;border-radius:10px;background:#12222f;overflow:hidden;position:relative}.graph-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:0;margin:0}.graph-heading .eyebrow{font-size:6px;letter-spacing:1.5px}.graph-heading h2{font-size:17px;margin:3px 0 0;line-height:1.1;letter-spacing:-.2px}.graph-key{font-size:8px;white-space:nowrap;color:var(--muted)}.graph-card canvas{display:block;width:100%;height:100%;min-height:0;min-width:0}.graph-caption{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);margin:0;padding:0;border:0}
.lab-dock{display:flex;align-items:center;justify-content:space-between;gap:20px;min-width:0;min-height:0;border-top:1px solid #273c47;padding-top:5px}.app-status{min-width:0;margin:0;font-size:9px;line-height:1.4;color:#93aebb;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.dock-actions{display:flex;align-items:center;gap:5px;flex-shrink:0}.dock-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:34px;padding:6px 12px;border:1px solid transparent;border-radius:7px;background:transparent;font-size:10px;color:#bdd0d5}.dock-button>span{font-size:18px;color:var(--cyan);line-height:1}.dock-button:hover,.dock-button[aria-expanded=true]{border-color:#50756e;background:#91e3d111;color:var(--cyan)}.dock-settings{display:none}
.physics-drawer{position:fixed;inset:78px 14px 14px auto;z-index:30;display:none;grid-template-rows:74px minmax(0,1fr) 65px;gap:0;width:min(510px,calc(100vw - 30px));height:calc(100dvh - 92px);max-width:none;max-height:none;min-height:0;margin:0;padding:0;border:1px solid #547470;border-radius:14px;background:#122430;color:var(--text);box-shadow:0 12px 80px #0009;overflow:hidden}.physics-drawer[open]{display:grid}.physics-drawer::backdrop{background:#071017a6;backdrop-filter:blur(3px)}
.drawer-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:0;padding:15px 22px;border-bottom:1px solid #324b55;background:#192f3b}.drawer-heading .eyebrow{font-size:7px}.drawer-heading h2{margin:4px 0 0;font:400 26px/1.2 Georgia,serif}.drawer-close{display:grid;place-items:center;width:40px;height:40px;border:1px solid #425f69;background:#233e48;color:#d6ede7;border-radius:50%;font-size:26px;line-height:1;flex-shrink:0}
.drawer-content{min-height:0;min-width:0;overflow-y:auto;overflow-x:hidden;padding:22px;scrollbar-width:thin;scrollbar-color:#50746e #122430;overscroll-behavior:contain}.drawer-footer{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 20px;border-top:1px solid #324b55;background:#132632}.drawer-footer>span{font-size:9px;color:var(--muted)}.drawer-footer>.button{min-height:38px;font-size:10px;padding:8px 12px}
.drawer-content>.intro{display:block;margin:0 0 24px;padding-bottom:22px;border-bottom:1px solid var(--line)}.drawer-content .intro-aside{display:none}.drawer-content .intro h1{font-size:29px;margin:8px 0 13px}.drawer-content .intro p{font-size:11px}
.drawer-content>.learning{display:grid;grid-template-columns:1fr;gap:20px;margin:0}.drawer-content .explanation,.drawer-content .challenge{padding:0;border:0;background:none}.drawer-content .explanation h2,.drawer-content .challenge h2{font-size:25px;line-height:1.2}.drawer-content .explanation p,.drawer-content .challenge p{font-size:12px;line-height:1.85}.drawer-content .formula{padding:17px 13px;font-size:20px;overflow-wrap:anywhere}.drawer-content .challenge{padding:20px;background:#91e3d108;border:1px solid #4e7366;border-radius:10px}.drawer-content .model-note{font-size:10px!important}.drawer-content>.app-footer{display:flex;flex-direction:column;align-items:flex-start;gap:15px;padding:20px 0 0;margin-top:25px;font-size:9px}.drawer-content .app-footer>div{display:flex;flex-wrap:wrap;gap:12px 17px}.drawer-content .app-footer a{font-size:9px}
.drawer-content>.guide-card{display:block;padding:0;margin:0;border:0;background:none}.drawer-content .guide-header{align-items:flex-start;flex-direction:column;gap:17px}.drawer-content .guide-header h2{font-size:26px}.drawer-content .guide-header .button{min-height:42px;font-size:11px}.drawer-content .guide-content{grid-template-columns:1fr;gap:16px}.drawer-content .guide-stops{grid-template-columns:repeat(2,minmax(0,1fr))}.drawer-content .guide-actions{flex-wrap:wrap;gap:10px}.drawer-content .guide-actions .button{flex:1 1 160px;min-height:42px}.drawer-content .guide-target-box{padding:17px}.drawer-content .guide-content h3{font-size:25px}.drawer-content .guide-stops button{font-size:10px;min-height:43px}
.drawer-content>.notebook-card{display:block;margin:0;padding:0;border:0;background:none}.drawer-content .notebook-heading{flex-direction:column;align-items:flex-start;gap:15px}.drawer-content .notebook-heading h2{font-size:26px}.drawer-content .notebook-tools{flex-direction:row;align-items:center;width:100%;justify-content:space-between}.drawer-content .notebook-list{grid-template-columns:1fr}.drawer-content .notebook-entry{padding:15px}.drawer-content .notebook-tools .button{min-height:42px}.drawer-content .notebook-clear{min-height:42px}
.drawer-content>.controls{display:block;max-height:none;height:auto;padding:0;border:0;background:none;overflow:visible}.drawer-content .controls-heading{display:none}.drawer-content .controls h2{font-size:29px}.drawer-content .field{margin-top:24px}.drawer-content .field label,.drawer-content .field output{font-size:12px}.drawer-content .field select{min-height:44px;font-size:12px}.drawer-content .field input[type=range]{min-height:30px}.drawer-content .controls .control-copy{font-size:12px}.drawer-content .controls .switch-button{min-height:44px;font-size:12px}
.no-script{position:fixed;inset:80px 20px auto;z-index:50;padding:20px;border:1px solid var(--gold);background:#172632}
@media(min-width:1600px){.workspace{grid-template-columns:300px minmax(0,1fr)}.controls{padding:23px}.field{margin-top:25px}.experiment{grid-template-rows:minmax(250px,1fr) 68px 42px minmax(175px,.58fr)}.stage-heading h2{font-size:21px}.metrics dd{font-size:27px}}
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@media(max-width:760px){.physics-app{grid-template-rows:58px minmax(0,1fr)}.app-header{padding:9px 12px;gap:10px}.brand-mark{width:33px;height:33px;font-size:27px;border-radius:9px}.brand strong{font-size:20px}.brand small{font-size:5px;letter-spacing:1.1px}.header-actions{gap:0}.header-actions .button{min-height:34px;font-size:9px;padding:7px 10px}.back-link{display:none}.app-main{padding:9px 9px calc(6px + env(safe-area-inset-bottom,0px));grid-template-rows:53px minmax(0,1fr) 44px;gap:8px}.lab-nav{grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}.lab-button{justify-content:center;flex-direction:column;gap:4px;padding:5px 2px;border-radius:8px}.lab-button.is-active{box-shadow:inset 0 -2px var(--cyan)}.lab-icon{font-size:20px;min-width:0}.lab-button strong{font-size:9px;letter-spacing:-.2px}.lab-button small,.lab-number,.lab-arrow{display:none}.workspace{display:block;min-height:0;height:100%}.workspace>.controls{display:none}.experiment{height:100%;grid-template-rows:minmax(180px,1fr) 59px 37px minmax(145px,.57fr);gap:7px}.stage-card{grid-template-rows:43px minmax(0,1fr) 43px 32px;border-radius:10px}.stage-heading{padding:8px 12px;gap:6px}.stage-heading .eyebrow{font-size:6px;letter-spacing:1px}.stage-heading h2{font-size:17px;letter-spacing:-.4px;margin-top:3px}.stage-heading .icon-button{min-height:29px;font-size:8px;padding:4px 7px}.scene-wrap canvas{height:100%;min-height:0}.scene-badge{left:10px;bottom:9px;font-size:6px;padding:5px 7px}.scene-coordinate{right:8px;bottom:9px;font-size:7px}.transport{flex-wrap:nowrap;padding:5px 10px;gap:6px}.transport-actions{gap:5px}.play-button{min-width:84px;min-height:32px;font-size:10px;padding:6px 10px}.transport .icon-button{min-height:32px;width:30px;min-width:30px}.speed-label{font-size:8px;gap:5px;margin-left:auto}.speed-label select{font-size:8px;min-height:30px;padding:4px 5px}.time-control{padding:0 12px 5px}.time-control label,.time-control output{font-size:7px}.time-control input[type=range]{min-height:17px}.metrics{grid-template-columns:repeat(4,minmax(0,1fr));border-radius:8px}.metrics>div,.metrics>div:nth-child(3),.metrics>div:nth-child(4){padding:7px 7px;border-top:0;border-left:1px solid #314650}.metrics>div:first-child{border-left:0}.metrics dt{font-size:7px;line-height:1.3;min-height:18px;display:flex;align-items:center}.metrics dd{font-size:18px;margin-top:3px;letter-spacing:-.6px}.notebook-capture{padding:0 2px;gap:7px;flex-direction:row}.notebook-name-field{gap:0}.notebook-name-field label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.notebook-name-field input{max-width:none;min-height:33px;font-size:9px;padding:7px 8px}.notebook-capture>.button{min-height:33px;flex-shrink:0;width:auto;font-size:8px;padding:7px 9px;gap:4px}.graph-card{padding:8px 9px 4px;grid-template-rows:33px minmax(0,1fr);border-radius:9px}.graph-heading h2{font-size:15px;letter-spacing:-.4px}.graph-heading .eyebrow{font-size:5px;letter-spacing:1px}.graph-key{font-size:7px}.graph-key .legend-line{width:12px}.graph-card canvas{height:100%;min-height:0}.lab-dock{display:block;padding:3px 0 0;border-top:1px solid #31434e}.lab-dock>.app-status{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.dock-actions{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:3px;width:100%}.dock-button,.dock-settings{display:flex;gap:6px;min-height:37px;padding:6px 3px;font-size:8px}.dock-button>span{font-size:17px}.physics-drawer{inset:8px;width:calc(100vw - 16px);height:calc(100dvh - 16px);max-height:calc(100dvh - 16px);border-radius:13px;grid-template-rows:73px minmax(0,1fr) 67px}.drawer-heading{padding:14px 17px}.drawer-heading .eyebrow{font-size:6px}.drawer-heading h2{font-size:26px}.drawer-content{padding:20px 18px}.drawer-footer{padding:12px 16px;gap:10px}.drawer-footer>span{max-width:110px;font-size:8px;line-height:1.5}.drawer-footer>.button{font-size:9px;padding:8px 10px}.drawer-content .guide-stops{gap:7px}.drawer-content .guide-stops button{padding:9px 7px;font-size:9px}.drawer-content .guide-content h3{font-size:25px}.drawer-content .notebook-entry-heading{gap:5px}.drawer-content .notebook-entry-name{font-size:18px}.drawer-content .notebook-tools{gap:8px}.drawer-content .notebook-clear{font-size:9px}.experiment>.notebook-status{font-size:9px;bottom:8px;padding:8px 10px}.drawer-content .notebook-entry-measures strong{font-size:23px}}
@media(max-width:380px){.physics-app{grid-template-rows:52px minmax(0,1fr)}.app-header{padding:7px 9px}.brand{gap:7px}.brand-mark{width:31px;height:31px;font-size:25px}.brand strong{font-size:18px}.brand small{font-size:4.5px;letter-spacing:.8px}.header-actions .button{padding:6px 8px;gap:5px;font-size:8px}.app-main{grid-template-rows:48px minmax(0,1fr) 41px;gap:6px;padding:7px 7px 5px}.lab-button strong{font-size:8px}.lab-icon{font-size:18px}.experiment{grid-template-rows:minmax(150px,1fr) 50px 33px minmax(120px,.54fr);gap:5px}.stage-card{grid-template-rows:37px minmax(0,1fr) 38px 29px}.stage-heading{padding:6px 10px}.stage-heading h2{font-size:14px}.stage-heading .eyebrow{font-size:5px}.stage-heading .icon-button{min-height:26px;font-size:7px}.transport{padding:4px 7px;gap:3px}.play-button{min-width:74px;min-height:29px;padding:5px 8px;font-size:9px}.transport .icon-button{min-height:29px;min-width:27px;width:27px}.speed-label{font-size:7px;gap:3px}.speed-label select{min-height:28px;font-size:7px}.time-control{padding:0 10px 3px}.time-control label,.time-control output{font-size:6px}.time-control input[type=range]{min-height:16px;height:16px}.metrics>div,.metrics>div:nth-child(3),.metrics>div:nth-child(4){padding:5px}.metrics dt{font-size:6px;min-height:16px}.metrics dd{font-size:16px}.notebook-name-field input{min-height:29px;padding:5px 7px;font-size:8px}.notebook-capture>.button{min-height:29px;font-size:7px;padding:5px 7px}.graph-card{grid-template-rows:29px minmax(0,1fr);padding:5px 7px 2px}.graph-heading h2{font-size:13px}.graph-heading .eyebrow{font-size:4.5px}.graph-key{font-size:6px}.graph-key .legend-line{width:9px}.dock-button{font-size:7px;gap:4px;min-height:34px}.dock-button>span{font-size:16px}}
@media(max-height:650px) and (min-width:761px){.physics-app{grid-template-rows:52px minmax(0,1fr)}.app-main{grid-template-rows:48px minmax(0,1fr) 34px;padding-top:8px;gap:8px}.lab-button small{display:none}.experiment{grid-template-rows:minmax(160px,1fr) 44px 32px minmax(115px,.52fr);gap:5px}.stage-card{grid-template-rows:35px minmax(0,1fr) 36px 26px}.stage-heading h2{font-size:15px}.stage-heading .eyebrow{font-size:5px}.transport{padding:3px 12px}.transport .icon-button,.play-button{min-height:28px}.time-control{padding-bottom:2px}.time-control label,.time-control output{font-size:6px}.time-control input[type=range]{height:14px;min-height:14px}.metrics>div{padding:5px 12px}.metrics dd{font-size:19px}.metrics dt{font-size:7px}.notebook-capture>.button,.notebook-name-field input{min-height:29px}.graph-card{grid-template-rows:26px minmax(0,1fr);padding-top:5px}.graph-heading h2{font-size:14px}.graph-heading .eyebrow{font-size:5px}.physics-drawer{inset:60px 10px 8px auto;height:calc(100dvh - 68px)}}
@media(max-height:650px) and (max-width:760px){.experiment{grid-template-rows:minmax(200px,1fr) 44px 30px 105px;gap:5px}.stage-card{grid-template-rows:30px minmax(0,1fr) 35px 22px}.stage-heading{padding:4px 10px}.stage-heading .eyebrow{display:none}.stage-heading h2{margin:0;font-size:14px}.stage-heading .icon-button{min-height:24px;font-size:7px}.transport{padding:3px 8px}.time-control{padding:0 10px 2px}.time-control label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.time-control input[type=range]{height:18px;min-height:18px}.metrics>div,.metrics>div:nth-child(3),.metrics>div:nth-child(4){padding:4px 6px}.metrics dt{font-size:6px;min-height:14px}.metrics dd{font-size:16px;margin-top:2px}.notebook-capture>.button,.notebook-name-field input{min-height:28px;font-size:7px}.graph-card{grid-template-rows:24px minmax(0,1fr);padding-top:4px}.graph-heading .eyebrow{display:none}.graph-heading h2{font-size:13px}.graph-key{font-size:6px}}
.metrics dt{margin-bottom:0}.graph-card canvas{margin-top:0}.lab-button strong{font-family:inherit}
.graph-heading .eyebrow,.stage-heading .eyebrow{display:block}
body .analytics-consent-reopen{top:15px!important;bottom:auto!important;left:auto!important;right:222px!important;width:34px!important;height:34px!important;min-height:34px!important;padding:0!important;font-size:0!important;border-color:#344c55!important;background:#122431!important;color:var(--muted)!important;box-shadow:none!important}
body .analytics-consent-reopen:before{content:'◌';font:20px/1 system-ui,sans-serif;color:var(--cyan)}
@media(max-width:1100px) and (min-width:761px){body .analytics-consent-reopen{right:204px!important}}
@media(max-width:760px){body .analytics-consent-reopen{top:12px!important;right:90px!important;width:31px!important;height:31px!important;min-height:31px!important}}
@media(max-width:380px){body .analytics-consent-reopen{top:10px!important;right:75px!important;width:30px!important;height:30px!important;min-height:30px!important}}
@media(max-height:650px) and (max-width:760px){.experiment{grid-template-rows:30px minmax(0,1fr) 46px 31px;gap:5px}.compact-views{display:grid;grid-template-columns:1fr 1fr;gap:5px;grid-row:1;min-width:0}.compact-views button{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:30px;padding:5px 11px;border:1px solid #344b55;border-radius:6px;background:#11232e;color:var(--muted);font-size:9px}.compact-views button[aria-pressed=true]{border-color:#91e3d17a;background:#244039;color:var(--cyan)}.compact-views button>span{font-size:17px;line-height:1}.experiment>.stage-card{grid-row:2;min-height:0}.experiment>.graph-card{display:none;grid-row:2;min-height:0;padding:9px 10px 4px;grid-template-rows:31px minmax(0,1fr)}.experiment>.metrics{grid-row:3}.experiment>.notebook-capture{grid-row:4}.experiment[data-compact-view=graph]>.stage-card{display:none}.experiment[data-compact-view=graph]>.graph-card{display:grid}.experiment>.graph-card .graph-heading h2{font-size:15px}.experiment>.graph-card .graph-heading .eyebrow{display:block;font-size:5px}.experiment>.graph-card .graph-key{font-size:7px}}