:root{--black:#0f111b;--white:#eff2fb;--accent:#84a4ff;--muted:#aaadb6;--sans:Arial,Helvetica,sans-serif;--gutter:clamp(24px,6.5vw,112px)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--black);color:var(--white);font-family:var(--sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}h1,h2,h3,p,figure{margin:0}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}button,a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid #92acff;outline-offset:7px}.skip{position:fixed;top:-100px;left:24px;background:var(--accent);color:var(--black);padding:12px;z-index:10}.skip:focus{top:12px}.site-header{position:absolute;top:0;left:var(--gutter);right:var(--gutter);height:112px;display:flex;justify-content:space-between;align-items:center;z-index:3;border-bottom:1px solid #ffffff25}.brand{font-size:34px;line-height:1;letter-spacing:-2px;font-weight:600}.brand span{font-weight:300}nav{display:flex;gap:36px;font-size:16px}nav a:hover{color:var(--accent)}.eyebrow{font-size:14px;font-weight:400;letter-spacing:.06em;line-height:1.6;color:var(--muted)}.text-link{display:inline-block;background:none;border:0;border-bottom:1px solid currentColor;border-radius:0;padding:0 0 7px;font-size:16px;text-align:left;line-height:1.6}.text-link:hover{color:#adc1ff}.battery-feature{background:var(--white);color:#171920;padding:95px var(--gutter) 84px;scroll-margin-top:0}.section-intro{max-width:780px}.section-intro .eyebrow{color:#696e7d;margin-bottom:20px}h2{font-size:clamp(40px,4.7vw,74px);font-weight:400;line-height:1.08;letter-spacing:-.055em}.section-intro>p:last-child:not(.eyebrow){font-size:20px;line-height:1.6;color:#626877;margin-top:28px}.battery-figure{margin:56px 0 35px}.battery-figure svg{width:100%;height:auto;display:block;max-height:550px}.diagram-label{font:20px Arial,Helvetica,sans-serif;fill:#404759}.battery-figure figcaption{font-size:14px;color:#6c717d;text-align:center;margin-top:16px}.feature-end{display:flex;justify-content:space-between;align-items:center;gap:40px;border-top:1px solid #bdc3d0;padding-top:30px}.feature-end p{font-size:20px;line-height:1.5;color:#484f62}.next-topics{padding:99px var(--gutter) 20px}.next-topics .section-intro{margin-bottom:65px}.next-topics .section-intro .eyebrow{color:#9fa7ba}.topic-row{display:grid;grid-template-columns:1.22fr 1fr;gap:7%;align-items:center;border-top:1px solid #ffffff25;padding:60px 0}.topic-visual{min-width:0;position:relative;background:#171c2a}.topic-visual svg{display:block;width:100%;height:auto}.topic-visual figcaption{position:absolute;left:25px;bottom:19px;color:#8d93a2;font-size:14px}.topic-copy{min-width:0;overflow-wrap:break-word}.topic-copy .eyebrow{color:#9ca5bc;margin-bottom:22px}.topic-copy h3{font-size:clamp(34px,3.6vw,56px);font-weight:400;letter-spacing:-.05em;line-height:1.12}.topic-copy>p:not(.eyebrow){font-size:18px;line-height:1.6;color:#a8adbc;margin-top:25px}.topic-copy .text-link{color:var(--accent);margin-top:32px}.plot-label{font:18px var(--fig-font,Arial,sans-serif);fill:#8a93aa}.about{padding:100px var(--gutter) 110px;background:#171725}.about-copy{max-width:750px}.about .eyebrow{margin-bottom:24px}.about-copy>p:not(.eyebrow){font-size:20px;line-height:1.7;color:#abb1c0;margin-top:28px;max-width:610px}.about details{border-top:1px solid #ffffff30;margin-top:40px;padding-top:24px;max-width:610px}.about summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;font-size:16px}.about summary::-webkit-details-marker{display:none}.about summary span{color:var(--accent);font-size:22px}.about details p{margin-top:20px;color:#abb1c0;font-size:16px;line-height:1.7}footer{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:50px var(--gutter);font-size:14px;color:#9da3b2}footer .brand{color:var(--white)}dialog{padding:42px 28px;width:calc(100% - 32px);max-width:720px;max-height:88svh}dialog::backdrop{background:#000b;backdrop-filter:blur(7px)}.dialog-close{position:absolute;top:15px;right:20px;border:0;background:none;font-size:32px;line-height:1.2;padding:5px 8px}dialog .eyebrow{color:#5e6579}dialog h2{font-size:34px}dialog p:not(.eyebrow){font-size:17px;line-height:1.7;margin-top:25px;color:#495063}dialog ul{margin:25px 0 0;padding-left:20px}dialog li{margin-top:10px;color:#495063}dialog .dialog-note{border-top:1px solid #b4b9c5;padding-top:20px;font-size:14px}dialog .dialog-credit{border-top:1px solid #b4b9c5;padding-top:20px;font-size:15px}dialog .dialog-credit a{border-bottom:1px solid currentColor}

@media(max-width:1000px){.topic-row{gap:6%;grid-template-columns:1fr 1fr}.feature-end p{font-size:18px}.topic-visual figcaption{font-size:12px;left:15px;bottom:12px}.diagram-label{font-size:22px}}
@media(max-width:700px){.site-header{height:84px}.brand{font-size:30px}nav{font-size:15px;gap:24px}.battery-feature{padding-top:65px;padding-bottom:57px}.section-intro .eyebrow{font-size:12px;max-width:290px}.section-intro>p:last-child:not(.eyebrow){font-size:18px;margin-top:22px}h2{font-size:44px}.battery-figure{margin:42px -10px 27px}.battery-figure figcaption{font-size:12px;margin-top:10px}.diagram-label{font-size:27px}.feature-end{display:block;padding-top:25px}.feature-end p{font-size:18px}.feature-end .text-link{margin-top:25px}.next-topics{padding-top:65px}.next-topics .section-intro{margin-bottom:42px}.topic-row{display:block;padding:38px 0 45px}.topic-visual{margin-bottom:32px}.topic-visual figcaption{font-size:12px}.topic-copy .eyebrow{font-size:12px;margin-bottom:16px}.topic-copy h3{font-size:38px}.topic-copy>p:not(.eyebrow){font-size:18px;margin-top:18px}.topic-copy .text-link{margin-top:24px}.about{padding-top:65px;padding-bottom:65px}.about .eyebrow{font-size:12px}.about h2{font-size:43px}.about-copy>p:not(.eyebrow){font-size:18px;margin-top:25px}.about details{margin-top:30px}footer{flex-wrap:wrap;padding-top:36px;padding-bottom:36px;gap:25px}footer p{width:calc(100% - 110px);max-width:220px}footer>a:last-child{width:100%}dialog{padding:42px 28px}dialog h2{font-size:34px}}
@media(max-width:370px){h2{font-size:39px}.topic-copy h3{font-size:34px}.about h2{font-size:38px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

.topic-visual img{display:block;width:100%;aspect-ratio:640/500;object-fit:cover;object-position:72% center}

.battery-figure img{display:block;width:100%;height:550px;object-fit:cover;object-position:center}

@media(max-width:700px){.battery-figure img{height:360px;object-position:72% center}}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* Blue and violet accents across the library. */
.impedance-visual{background:#1c182f}

[hidden]{display:none!important}

/* Preview the actual module at the corresponding device layout. */
.battery-figure{background:#0f111b}.battery-figure img{width:100%;height:auto;object-fit:contain;display:block}.battery-figure a{display:block}.battery-figure a:focus-visible{outline-offset:6px}
@media(max-width:700px){.battery-figure{margin:35px 0 28px}.battery-figure img{width:100%;height:auto;object-fit:contain}}

.battery-feature{display:grid;grid-template-columns:.9fr 1.35fr;align-items:center;gap:45px;background:#151929;color:var(--white);padding-top:76px;padding-bottom:76px}.battery-feature .section-intro .eyebrow{color:#a8b2c8}.battery-feature h2{font-size:clamp(38px,4.1vw,68px)}.battery-feature .section-intro>p:last-child:not(.eyebrow){color:#adb9cf;font-size:18px}.feature-copy>.text-link{margin-top:32px;color:#b3c9ff}.battery-figure{margin:0;background:none;min-width:0}.battery-figure>a{display:block;width:100%;height:500px;position:relative;background:none!important}.battery-figure canvas{display:block;pointer-events:none;width:100%;height:100%}.battery-figure .teaser-fallback::after{content:'Explore the interactive cell';position:absolute;inset:0;display:grid;place-items:center;color:#a5beff}
@media(max-width:900px){.battery-feature{gap:15px;grid-template-columns:.9fr 1.25fr}.battery-figure>a{height:420px}}
@media(max-width:700px){.battery-feature{display:flex;flex-direction:column;align-items:stretch;gap:20px;padding-top:55px;padding-bottom:35px}.battery-feature .feature-copy{position:relative;z-index:1}.battery-feature h2{font-size:40px}.battery-feature h2 br{display:none}.battery-feature .section-intro>p:last-child:not(.eyebrow){font-size:16px;max-width:300px}.battery-figure{margin:0 -14px}.battery-figure>a{height:320px}.feature-copy>.text-link{margin-top:24px}}
.diffusion-radius{fill:#a5b2cb;font-family:var(--fig-font);font-size:19px;letter-spacing:.04em}

.percolation-visual{background:#16212e}

.nanoparticle-visual a{display:block;overflow:hidden}.nanoparticle-visual img{transition:transform 650ms cubic-bezier(.22,.75,.2,1)}.nanoparticle-visual a:hover img,.nanoparticle-visual a:focus-visible img{transform:scale(1.025)}@media(prefers-reduced-motion:reduce){.nanoparticle-visual img{transition:none}.nanoparticle-visual a:hover img,.nanoparticle-visual a:focus-visible img{transform:none}}