@charset "UTF-8";
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:root[data-theme=light]{color-scheme:light;--bg:#f5f7fc;--panel:#fff;--panel2:#eaf0f9;--text:#19283f;--muted:#52647d;--line:#d2dcec;--accent:#285da7;--button:#16786b;--buttonText:#fff;--lavender:#7656b5;--soft:#edf2fa;--shadow:0 20px 60px #2036510c}
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@media(min-width:1600px){.hero{padding-top:78px;padding-bottom:78px}.cosmos-img{height:330px}}
@media(max-width:1150px){.wrap{padding-left:28px;padding-right:28px}.header-inner{gap:20px;flex-wrap:wrap;padding-top:20px;padding-bottom:16px}.nav-area{flex:1;gap:15px}.utilities{gap:10px;padding-left:12px}.primary-nav{gap:17px}.brand{font-size:24px}.theme-switch button{padding:6px 8px}.hero{gap:30px}.hero h1{font-size:62px}.hero-copy>p:not(.eyebrow){font-size:16px}.cosmos-img{height:260px}.art-heading{padding:23px 22px 0}.art-heading .art-caption{display:none}.card-text h3{font-size:14px}}
@media(max-width:900px){.header-inner{justify-content:center}.nav-area{flex-basis:100%;justify-content:space-between}.hero{grid-template-columns:1fr 1fr;gap:24px;padding-top:43px;padding-bottom:45px}.hero h1{font-size:52px;letter-spacing:-1.7px}.hero .actions .button{font-size:12px;padding:10px 16px}.cosmos-img{height:220px}.art-heading h2{font-size:27px}.art-footer{padding:14px 20px}.card-grid{grid-template-columns:repeat(2,1fr)}.how,.about{grid-template-columns:1fr;gap:24px}.plans{gap:12px}.plan{padding:24px}.price{font-size:34px}}
@media(max-width:650px){.wrap{padding-left:20px;padding-right:20px}.header-inner{padding-top:17px;padding-bottom:13px;gap:17px}.brand{font-size:25px}.brand img{width:27px;height:34px}.nav-area{flex-direction:column;gap:12px}.primary-nav{width:100%;justify-content:space-between;gap:10px;font-size:12px}.primary-nav summary{min-height:36px;gap:4px}.utilities{width:100%;justify-content:space-between;border:0;border-top:1px solid var(--line);padding:9px 0 0}.theme-switch button{min-height:34px;padding:6px 13px}.drop-panel{left:0;right:auto;min-width:225px;max-width:calc(100vw - 40px)}.hero{grid-template-columns:1fr;padding-top:35px;gap:33px}.hero h1{font-size:clamp(49px,11.5vw,69px);line-height:1.03;letter-spacing:-2px;margin-bottom:22px}.hero h1 span{display:inline}.hero h1 span::after{content:' '}.eyebrow{font-size:9px;letter-spacing:3px;margin-bottom:17px}.hero-copy>p:not(.eyebrow){font-size:15px;margin-bottom:24px}.hero .actions .button{font-size:13px;min-height:46px;padding:10px 15px}.cosmos-img{height:255px}.art-heading{padding:20px 20px 0}.art-heading h2{font-size:30px}.art-heading .art-caption{display:block;font-size:9px}.section-heading{display:block}.section-heading h2{font-size:32px}.section-heading p{font-size:14px}.section-heading .text-link{display:inline-block;margin-top:12px}.filters{gap:7px}.filters button{font-size:11px;padding:8px 12px}.card-grid{grid-template-columns:1fr}.card-visual{height:200px}.card-text h3{font-size:17px}.card-description{font-size:13px}.how{margin-top:40px;padding:28px 0}.how h2{font-size:29px}.steps{grid-template-columns:1fr;gap:21px}.step-number{float:left;margin-right:17px;margin-top:3px}.steps p{padding-left:35px}.about{padding:35px 0 40px}.about h2{font-size:30px}.about p{font-size:14px}.footer-inner{flex-wrap:wrap;gap:18px}.footer-links{gap:14px;font-size:11px;flex-wrap:wrap}.copyright{width:100%}.page-main{padding-top:35px;padding-bottom:45px}.page-intro{text-align:left}.page-intro h1{font-size:42px}.plans{grid-template-columns:1fr}.plan{padding:25px}.center-card{padding:24px}.disclosure h2{font-size:25px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}

/* Each slogan sentence stays on its own line and scales to its column. */
.hero-copy{min-width:0;container-type:inline-size}
.hero h1{font-size:clamp(22px,4vw,52px);line-height:1.16;letter-spacing:-.025em}
@supports(font-size:1cqi){.hero h1{font-size:clamp(20px,8.8cqi,58px)}}
.hero h1 span{display:block;white-space:nowrap}
.hero h1 span::after{content:none}

/* The catalog grows by subject; only published experiments are listed. */
.subject-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:32px}
.filters.subject-grid button{display:flex;flex-direction:column;align-items:flex-start;gap:8px;text-align:left;padding:21px 23px;border-radius:14px;background:var(--panel);white-space:normal}
.filters.subject-grid button:hover,.filters.subject-grid button[aria-pressed=true]{border-color:var(--accent);background:var(--panel2);color:var(--text)}
.subject-number{font:12px var(--mono);color:var(--accent)}
.subject-name{font-size:18px;font-weight:600;color:var(--text)}
.subject-topics{font-size:12px;color:var(--muted)}
.subject-count{font-size:11px;color:var(--muted);border-top:1px solid var(--line);width:100%;padding-top:10px;margin-top:5px}
.subject-count.has-experiments{color:var(--accent)}
.catalog-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px}
.catalog-toolbar h3{margin:0;font-size:21px;font-weight:500}
.catalog-toolbar button{background:transparent;color:var(--accent);border:1px solid var(--line);border-radius:20px;padding:8px 14px;font-size:12px}
.catalog-toolbar button[aria-pressed=true]{background:var(--panel2)}
.catalog-status{color:var(--muted);font-size:13px;margin:8px 0 20px}
.catalog-results{grid-template-columns:1fr}
.catalog-results .sim-card{display:grid;grid-template-columns:minmax(240px,.8fr) 1.2fr;column-gap:14px}
.catalog-results .card-visual{grid-row:1/3;height:235px}
.catalog-results .card-text{align-self:end;padding:25px 25px 12px}
.catalog-results .card-text h3{font-size:25px}
.catalog-results .card-description{padding:0 25px 30px;font-size:14px;max-width:580px}
@media(max-width:900px){.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:650px){.filters.subject-grid button{padding:16px;gap:6px}.subject-name{font-size:15px}.subject-topics{font-size:11px}.catalog-results .sim-card{display:flex}.catalog-results .card-visual{height:200px}.catalog-results .card-text{align-self:stretch}.catalog-toolbar{align-items:flex-start}.catalog-toolbar h3{font-size:19px}.catalog-toolbar button{font-size:11px}}
@media(max-width:360px){.subject-grid{grid-template-columns:1fr}}

.language-switch{display:flex;gap:4px;align-items:center;white-space:nowrap;font:12px 'Segoe UI',Arial,sans-serif}.language-switch a{display:inline-block;padding:6px 8px;border:1px solid transparent;border-radius:7px;color:var(--muted)}.language-switch a[aria-current=page]{color:var(--accent,var(--blue));border-color:var(--line);background:var(--panel2,var(--inset))}.catalog-hint{font-size:12px;color:var(--muted);margin:10px 0 0}.catalog-results .card-visual{height:220px}.catalog-results .card-text h3{font-size:23px}.hero-art .art-caption{max-width:100px;white-space:normal;text-align:right}

@supports(font-size:1cqi){html[lang=en] .hero h1{font-size:clamp(18px,8cqi,56px)}html[lang=fr] .hero h1{font-size:clamp(18px,7.7cqi,54px)}}

/* Readable type and touch-friendly navigation at every viewport width. */
body{font-size:17px}.primary-nav{font-size:16px;gap:20px}.primary-nav>a,.primary-nav summary{display:flex;align-items:center;min-height:44px}.drop-panel a{font-size:16px;min-height:44px}.drop-panel small{font-size:13px}.utilities{font-size:15px}.nav-area{flex-wrap:wrap}.header-inner{flex-wrap:wrap;padding-top:18px;padding-bottom:18px}.theme-switch button{font-size:14px;min-height:44px;padding:8px 12px}.language-switch{font-size:14px}.language-switch a{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center}.eyebrow{font-size:12px}.button{font-size:16px}.subject-topics,.subject-count,.catalog-status,.catalog-hint{font-size:15px}.card-description,.catalog-results .card-description,.section-heading p,.about p,.notice,.disclosure p,.disclosure li{font-size:17px}.subject-name{font-size:19px}.about .note,.footer-links,.copyright,.art-footer,.plan p:not(.price){font-size:14px}.hero-copy>p:not(.eyebrow){font-size:19px}.pill{font-size:12px}.card-text p{font-size:12px}.footer-links a{padding:8px 0}.primary-nav{flex-wrap:wrap}.utilities{flex-wrap:wrap}.math-display{display:flex;align-items:center;justify-content:center;min-width:0;padding:20px 16px;margin:0;background:var(--soft);color:var(--accent);border-radius:10px}.math-equation{display:block;max-width:100%;height:auto;overflow:visible}.formula-grid{display:flex;flex-wrap:wrap;align-items:stretch;gap:14px;margin:22px 0}.formula-grid>.math-display{flex:1 1 200px}.model-assumptions{border-top:1px solid var(--line);margin-top:26px;padding-top:20px}.model-assumptions h3{font-size:21px;margin:0 0 16px}
@media(max-width:900px){.nav-area{justify-content:center}.utilities{border:0;padding-left:0}.hero-copy>p:not(.eyebrow){font-size:18px}}
@media(max-width:650px){.primary-nav{display:grid;grid-template-columns:1fr 1fr;gap:6px 16px;font-size:16px;width:100%}.primary-nav summary{gap:8px;white-space:normal}.drop-panel{min-width:220px;max-width:calc(100vw - 40px);left:auto;right:0}.primary-nav .dropdown{min-width:0}.utilities{justify-content:center;gap:12px}.theme-switch button{font-size:14px;min-height:44px}.subject-grid{grid-template-columns:1fr}.subject-name{font-size:19px}.subject-topics,.subject-count{font-size:15px}.card-description,.catalog-results .card-description,.section-heading p,.about p{font-size:17px}.hero-copy>p:not(.eyebrow){font-size:18px}.art-heading .art-caption{font-size:11px}.formula-grid{display:grid;grid-template-columns:minmax(0,1fr)}.math-display{padding:20px 10px}}

.future-subjects{margin:12px 0 24px;color:var(--muted)}.future-subjects summary{cursor:pointer;padding:12px 0;font-size:16px}.future-subjects .subject-grid{margin-top:12px}