:root{--gw-cyan:#6ee7ff;--gw-blue:#458cff;--gw-violet:#bd8cff;--gw-amber:#ffc66d;--gw-red:#ff6b78;--gw-green:#70f1c4}body.gravity-page{background:radial-gradient(circle at 50% -8%,#2f68b438,#0000 38rem),#03060b;overflow-x:hidden}.gravity-topbar{z-index:30;-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);min-width:0;position:sticky;top:0}.gravity-topbar .status{white-space:nowrap;min-width:max-content}.gravity-hero{padding:clamp(2.2rem,5vw,5rem) clamp(.8rem,2.8vw,2.2rem) 2rem}.gravity-hero__copy{max-width:1640px;margin:0 auto clamp(2rem,4vw,3.8rem)}.gravity-hero__copy h1{text-wrap:balance;max-width:14ch;font-size:clamp(3.3rem,7.5vw,8rem)}.gravity-hero__copy h1 em{color:#0000;background:linear-gradient(90deg, var(--gw-cyan), #f3f7fa 46%, var(--gw-violet));-webkit-background-clip:text;background-clip:text;font-style:normal}.gravity-hero__lede{max-width:760px;color:var(--muted);text-wrap:pretty;margin:1.5rem 0 0;font-size:clamp(.98rem,1.35vw,1.16rem);line-height:1.75}.truth-strip{color:var(--dim);letter-spacing:.13em;flex-wrap:wrap;align-items:center;gap:.7rem;margin-top:1.5rem;font-size:.58rem;display:flex}.truth-strip i{background:var(--gw-violet);width:4px;height:4px;box-shadow:0 0 10px var(--gw-violet);border-radius:50%}.gravity-lab{border:1px solid var(--line);background:#03060bd1;grid-template-columns:270px minmax(0,1fr) 300px;max-width:1780px;min-height:720px;margin:0 auto;display:grid;box-shadow:0 40px 130px #00000080,0 0 70px #4e96ff0f}.gravity-controls,.gravity-readouts{z-index:4;background:#080e17ed;min-width:0;padding:1.45rem}.gravity-controls{border-right:1px solid var(--line);flex-direction:column;gap:1.5rem;display:flex}.gravity-readouts{border-left:1px solid var(--line);flex-direction:column;gap:1.35rem;display:flex}.preset-stack{gap:.4rem;display:grid}.preset-stack button{width:100%;color:var(--muted);text-align:left;cursor:pointer;background:0 0;border:1px solid #0000;grid-template-columns:auto 1fr;gap:.15rem .65rem;padding:.72rem;display:grid}.preset-stack button span{color:var(--dim);font:.58rem var(--mono);grid-row:1/3}.preset-stack button b{color:inherit;font-size:.74rem;font-weight:540}.preset-stack button small{color:var(--dim);font:.55rem var(--mono)}.preset-stack button:hover{border-color:var(--line);color:var(--ink)}.preset-stack button.active{color:var(--gw-cyan);background:#6ee7ff12;border-color:#6ee7ff6b}.gravity-control-group{border-top:1px solid var(--line);padding-top:1.2rem}.gravity-control-group>p{color:var(--dim);font:.59rem var(--mono);letter-spacing:.1em;text-transform:uppercase;margin:0 0 .65rem}.gravity-control-group .range-control{justify-content:space-between;gap:.75rem;margin:.75rem 0 .42rem;font-size:.68rem;display:flex}.gravity-control-group .range-control b{color:var(--dim);font-family:var(--mono)}.gravity-control-group .range-control output{color:var(--ink);font-family:var(--mono);flex:none}.gravity-control-group input[type=range]{margin-bottom:.25rem;display:block}.field-modes{grid-template-columns:repeat(3,1fr);display:grid}.field-modes button{border:1px solid var(--line);min-height:36px;color:var(--dim);font:500 .55rem var(--mono);text-transform:uppercase;cursor:pointer;background:0 0;border-right:0;padding:.5rem .3rem}.field-modes button:last-child{border-right:1px solid var(--line)}.field-modes button.active{color:var(--gw-violet);background:#b78cff1c;border-color:#b78cff59}.gravity-actions{gap:.45rem;margin-top:auto;display:grid}.gravity-actions button{border:1px solid var(--line);min-height:41px;color:var(--muted);font:600 .57rem var(--mono);letter-spacing:.09em;text-transform:uppercase;cursor:pointer;background:0 0}.gravity-actions button:hover{border-color:var(--gw-cyan);color:var(--ink)}.gravity-actions .primary{border-color:var(--gw-cyan);background:var(--gw-cyan);color:#031017}.gravity-viewport{background:radial-gradient(circle,#2959981c,#0000 42%),#02050a;min-width:0;min-height:720px;position:relative;overflow:hidden}.gravity-canvas,.gravity-canvas canvas{width:100%;height:100%;display:block;position:absolute;inset:0}.gravity-canvas{touch-action:none}.viewport-chrome,.orbit-axis,.scene-annotation,.visualization-note,.viewport-legend{z-index:3;pointer-events:none;position:absolute}.viewport-chrome{color:var(--dim);letter-spacing:.11em;justify-content:space-between;gap:1rem;font-size:.5rem;display:flex;top:1rem;left:1rem;right:1rem}.orbit-axis{color:#a5b1bd8c;letter-spacing:.1em;transform-origin:0 0;grid-template-columns:auto 64px auto;align-items:center;gap:.5rem;font-size:.47rem;display:grid;top:50%;left:1rem;transform:rotate(-90deg)translate(-50%)}.orbit-axis i{background:linear-gradient(90deg, var(--gw-cyan), var(--gw-violet));height:1px}.scene-annotation{color:var(--gw-amber);letter-spacing:.08em;border-left:1px solid;gap:.18rem;padding-left:.55rem;font-size:.52rem;transition:opacity .2s;display:grid}.scene-annotation span{color:var(--muted)}.scene-annotation--primary{top:34%;left:23%}.scene-annotation--secondary{color:var(--gw-cyan);top:58%;right:19%}.visualization-note{border:1px solid var(--line);max-width:26rem;color:var(--dim);letter-spacing:.08em;text-transform:uppercase;background:#03060bb8;padding:.55rem .7rem;font-size:.47rem;bottom:3.4rem;right:1rem}.viewport-legend{color:var(--dim);letter-spacing:.08em;flex-wrap:wrap;gap:.9rem;font-size:.48rem;display:flex;bottom:1rem;left:1rem;right:1rem}.viewport-legend span{align-items:center;gap:.35rem;display:flex}.legend-swatch{width:14px;height:1px;box-shadow:0 0 8px}.legend-swatch--cyan{color:var(--gw-cyan);background:currentColor}.legend-swatch--amber{color:var(--gw-amber);background:currentColor}.legend-swatch--violet{color:var(--gw-violet);background:currentColor}.gravity-readouts h2{font:570 1.1rem/1.12 var(--display);letter-spacing:-.025em;margin:0 0 .45rem}.gravity-readouts>div>p:not(.rail-kicker){color:var(--muted);margin:0;font-size:.74rem;line-height:1.55}.gravity-stat-list{border-top:1px solid var(--line)}.gravity-stat-list>div{border-bottom:1px solid var(--line);justify-content:space-between;gap:.7rem;padding:.72rem 0;display:flex}.gravity-stat-list span{color:var(--dim);font:.51rem var(--mono);letter-spacing:.07em;text-transform:uppercase}.gravity-stat-list strong{color:var(--ink);font:500 .62rem var(--mono);text-align:right}.validity-card{background:#70f1c409;border:1px solid #70f1c438;padding:.9rem}.validity-card strong{color:var(--gw-green);font:500 .64rem var(--mono);margin:.4rem 0;display:block}.validity-card p{color:var(--muted);margin:0;font-size:.66rem;line-height:1.5}.validity-card.is-caution{border-color:#ffc66d59}.validity-card.is-caution strong{color:var(--gw-amber)}.validity-card.is-limit{border-color:#ff6b7873}.validity-card.is-limit strong{color:var(--gw-red)}.validity-meter{background:#ffffff14;height:2px;margin-top:.8rem}.validity-meter i{background:currentColor;width:25%;height:100%;transition:width .2s;display:block;box-shadow:0 0 9px}.polarization-card canvas{border:1px solid var(--line);background:#03070d;width:100%;height:auto;display:block}.strain-deck{border:1px solid var(--line);background:#080e17eb;border-top:0;grid-template-columns:minmax(220px,.32fr) minmax(0,1fr);gap:2rem;max-width:1780px;margin:0 auto;padding:2rem;display:grid}.strain-deck h2{font:560 clamp(1.45rem, 2.6vw, 2.4rem)/1 var(--display);letter-spacing:-.05em;margin:0 0 .6rem}.strain-deck>div>p:not(.rail-kicker){max-width:25rem;color:var(--muted);margin:0;font-size:.8rem;line-height:1.55}.strain-chart{border:1px solid var(--line);background:#03070d;min-height:220px;position:relative}.strain-chart canvas{width:100%;height:100%;min-height:220px;display:block}.strain-label{color:var(--dim);letter-spacing:.1em;font-size:.47rem;position:absolute;bottom:.7rem}.strain-label--left{left:.8rem}.strain-label--right{right:.8rem}.gravity-section{border-top:1px solid var(--line);background:radial-gradient(circle at 75% 25%,#5051b314,#0000 28rem),#05080e;padding:clamp(4.5rem,9vw,9rem) clamp(1rem,5vw,6rem)}.gravity-section--light{background:linear-gradient(145deg,#0f1926f5,#06090ffa),#060a10}.section-heading{grid-template-columns:minmax(0,1.25fr) minmax(250px,.58fr);align-items:end;gap:clamp(1.5rem,6vw,7rem);max-width:1560px;margin:0 auto 3.5rem;display:grid}.section-heading .eyebrow{grid-column:1/-1;margin-bottom:-1rem}.section-heading h2{max-width:15ch;font:560 clamp(2.7rem, 6vw, 6.3rem)/.95 var(--display);letter-spacing:-.07em;text-wrap:balance;margin:0}.section-heading>p:last-child{color:var(--muted);text-wrap:pretty;margin:0;font-size:clamp(.95rem,1.3vw,1.1rem);line-height:1.8}.concept-grid,.limit-grid{border-top:1px solid var(--line);border-left:1px solid var(--line);grid-template-columns:repeat(4,1fr);max-width:1560px;margin:0 auto;display:grid}.concept-grid article,.limit-grid article{border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-width:0;min-height:260px;padding:clamp(1.4rem,2.6vw,2.4rem)}.concept-grid article>span{color:var(--gw-cyan);font:.59rem var(--mono)}.concept-grid h3{font:560 clamp(1.3rem, 2vw, 1.8rem)/1.08 var(--display);letter-spacing:-.04em;margin:2.4rem 0 .8rem}.concept-grid p,.limit-grid p{color:var(--muted);text-wrap:pretty;margin:0;font-size:.86rem;line-height:1.72}.equation-row{grid-template-columns:repeat(3,1fr);gap:.7rem;max-width:1560px;margin:1.2rem auto 0;display:grid}.equation-row div{border:1px solid var(--line);background:#03070d8f;min-width:0;padding:1.2rem}.equation-row span{color:var(--gw-cyan);font:.5rem var(--mono);letter-spacing:.1em;margin-bottom:1rem;display:block}.equation-row strong{overflow-wrap:anywhere;color:var(--ink);font:400 clamp(.76rem, 1.15vw, 1rem)/1.6 var(--mono);display:block}.detector-layout{grid-template-columns:minmax(0,1.1fr) minmax(320px,.65fr);align-items:center;gap:clamp(2rem,6vw,7rem);max-width:1560px;margin:0 auto;display:grid}.detector-diagram{aspect-ratio:1.65;border:1px solid var(--line);background:radial-gradient(circle at 35% 63%,#6ee7ff1c,#0000 30%),#02060c;min-height:400px;position:relative;overflow:hidden}.beam{background:linear-gradient(90deg, #6ee7ff00, var(--gw-cyan), #6ee7ff29);position:absolute;box-shadow:0 0 12px #6ee7ffa6}.beam--horizontal{width:73%;height:1px;top:62%;left:13%}.beam--vertical{background:linear-gradient(#6ee7ff2e, var(--gw-cyan), #6ee7ff00);width:1px;height:70%;top:12%;left:35%}.mirror{width:6px;height:55px;box-shadow:0 0 18px var(--gw-cyan);background:#dcebf2;position:absolute}.mirror--right{top:calc(62% - 27px);right:13%}.mirror--top{width:55px;height:6px;top:12%;left:calc(35% - 27px)}.splitter{border:1px solid var(--gw-amber);width:20px;height:20px;position:absolute;top:calc(62% - 10px);left:calc(35% - 10px);transform:rotate(45deg)}.laser,.readout{color:var(--dim);letter-spacing:.1em;font-size:.52rem;position:absolute}.laser{top:calc(62% - 1.2rem);left:5%}.readout{top:83%;left:calc(35% - 3rem)}.pulse{width:7px;height:7px;box-shadow:0 0 16px 4px var(--gw-cyan);background:#fff;border-radius:50%;position:absolute}.pulse--horizontal{animation:3.2s ease-in-out infinite beam-h;top:calc(62% - 3px);left:35%}.pulse--vertical{animation:3.2s ease-in-out infinite beam-v;top:62%;left:calc(35% - 3px)}@keyframes beam-h{0%,to{opacity:.45;left:35%}50%{opacity:1;left:84%}}@keyframes beam-v{0%,to{opacity:.45;top:62%}50%{opacity:1;top:12%}}.detector-copy{border-top:1px solid var(--line);display:grid}.detector-copy article{border-bottom:1px solid var(--line);grid-template-columns:55px 1fr;gap:1rem;padding:1.5rem 0;display:grid}.detector-copy article>span{width:44px;height:44px;color:var(--gw-violet);font:500 1rem var(--mono);border:1px solid #b78cff57;place-content:center;display:grid}.detector-copy h3{font:560 1.15rem var(--display);margin:0 0 .5rem}.detector-copy p{color:var(--muted);margin:0;font-size:.86rem;line-height:1.65}.gravity-section--limits{background:radial-gradient(circle at 15% 30%,#ff6b7812,#0000 30rem),#04070c}.limit-grid{grid-template-columns:repeat(3,1fr)}.limit-grid article{min-height:210px}.limit-grid b{color:var(--gw-amber);font:500 .66rem var(--mono);letter-spacing:.1em;text-transform:uppercase;margin-bottom:1.2rem;display:block}.gravity-sources{background:#03060b}.source-list{border-top:1px solid var(--line);max-width:1560px;margin:0 auto;display:grid}.source-list a{border-bottom:1px solid var(--line);grid-template-columns:170px 1fr auto;align-items:center;gap:1.2rem;padding:1.25rem 0;text-decoration:none;display:grid}.source-list a:hover strong{color:var(--gw-cyan)}.source-list span{color:var(--dim);font:.54rem var(--mono);letter-spacing:.1em}.source-list strong{font:520 clamp(.9rem, 1.4vw, 1.1rem) var(--display);transition:color .2s}.source-list i{color:var(--gw-cyan);font:normal .55rem var(--mono)}.source-note{justify-content:space-between;gap:2rem;max-width:1560px;margin:2rem auto 0;display:flex}.source-note p{max-width:800px;color:var(--muted);margin:0;font-size:.78rem;line-height:1.7}.source-note strong{color:var(--ink)}.home-link{color:var(--gw-cyan);white-space:nowrap;font-size:.62rem;text-decoration:none}@media (width<=1280px){.gravity-lab{grid-template-columns:245px minmax(0,1fr)}.gravity-readouts{border-top:1px solid var(--line);border-left:0;grid-column:1/-1;grid-template-columns:repeat(4,1fr);display:grid}.gravity-stat-list{grid-column:span 2;grid-template-columns:1fr 1fr;display:grid}.gravity-stat-list>div:nth-child(odd){border-right:1px solid var(--line);padding-right:1rem}.validity-card,.polarization-card{align-self:stretch}.concept-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=940px){.gravity-topbar{grid-template-columns:1fr auto}.gravity-topbar .lab-nav{grid-area:2/1/auto/-1;padding-bottom:.5rem}.gravity-topbar .status{display:none}.gravity-lab{grid-template-columns:1fr}.gravity-controls{border-right:0;border-bottom:1px solid var(--line);grid-template-columns:.85fr 1.15fr;display:grid}.gravity-actions{margin-top:0}.gravity-viewport{min-height:660px}.gravity-readouts{grid-template-columns:1fr 1fr}.gravity-stat-list{grid-column:span 2}.strain-deck,.section-heading{grid-template-columns:1fr}.section-heading .eyebrow{margin-bottom:0}.section-heading h2{max-width:16ch}.equation-row,.detector-layout{grid-template-columns:1fr}}@media (width<=660px){.gravity-hero{padding-left:.6rem;padding-right:.6rem}.gravity-hero__copy{padding:0 .45rem}.gravity-hero__copy h1{letter-spacing:-.065em;overflow-wrap:normal;word-break:normal;-webkit-hyphens:none;hyphens:none;max-width:none;font-size:clamp(2.8rem,15vw,5rem);line-height:.94}.gravity-hero__lede{font-size:.92rem}.truth-strip{gap:.5rem}.gravity-controls,.gravity-readouts{grid-template-columns:1fr;padding:1.1rem}.gravity-viewport{min-height:520px}.gravity-readouts>*,.gravity-stat-list{grid-column:1}.gravity-stat-list{grid-template-columns:1fr}.gravity-stat-list>div:nth-child(odd){border-right:0;padding-right:0}.viewport-chrome span:last-child,.orbit-axis,.scene-annotation{display:none}.visualization-note{max-width:none;bottom:4rem;left:.6rem;right:.6rem}.viewport-legend{gap:.55rem}.strain-deck{padding:1.15rem}.gravity-section{padding:4.5rem 1rem}.section-heading{margin-bottom:2.5rem}.section-heading h2{overflow-wrap:normal;word-break:normal;text-wrap:pretty;max-width:none;font-size:clamp(2.35rem,12vw,4.5rem);line-height:.98}.concept-grid,.limit-grid{grid-template-columns:1fr}.concept-grid article,.limit-grid article{min-height:auto}.detector-diagram{min-height:300px}.source-list a{grid-template-columns:1fr auto}.source-list span{grid-column:1/-1}.source-note{flex-direction:column}}@media (width<=430px){.gravity-topbar{padding:0 .7rem}.gravity-topbar .brand{font-size:.6rem}.gravity-topbar .lab-nav{scrollbar-width:none;flex-wrap:nowrap;justify-content:flex-start;overflow-x:auto}.gravity-topbar .lab-nav::-webkit-scrollbar{display:none}.gravity-topbar .lab-nav a{flex:none;padding:.55rem .62rem;font-size:.53rem}.gravity-hero__copy h1{font-size:clamp(2.45rem,14vw,3.8rem)}.gravity-viewport{min-height:470px}.gravity-control-group .range-control{align-items:end}.gravity-control-group .range-control span{min-width:0}.detector-diagram{aspect-ratio:1.22;min-height:0}.field-modes{grid-template-columns:1fr}.field-modes button{border-right:1px solid var(--line);border-bottom:0}.field-modes button:last-child{border-bottom:1px solid var(--line)}.viewport-legend{font-size:.42rem}.detector-copy article{grid-template-columns:44px 1fr;gap:.7rem}.source-list a{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.pulse{animation:none}}