:root{--paper:#fffefa;--surface:#f4f4ee;--ink:#242c25;--muted:#71796e;--line:#dfe4da;--accent:#47654a;--serif:Georgia,"Times New Roman",serif;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.75 var(--sans);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-underline-offset:4px}
a:hover{color:#263f2a}
a:focus-visible,video:focus-visible{outline:3px solid #77967a;outline-offset:5px}
.wrap{width:min(1080px,calc(100% - 80px));margin-inline:auto}
.skip-link{position:fixed;top:-70px;left:16px;z-index:10;padding:10px 16px;background:var(--ink);color:#fff}
.skip-link:focus{top:12px}
.masthead{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}
.brand{font-size:23px;font-weight:650;letter-spacing:-.7px;text-decoration:none;color:var(--ink)}
.brand-dot{color:var(--accent)}
nav{display:flex;gap:28px;font-size:13px}
nav a{text-decoration:none;color:var(--muted)}
.hero{padding:64px 0 0}
h1,h2{font-family:var(--serif);font-weight:400;text-wrap:balance}
h1{font-size:clamp(36px,4.6vw,60px);line-height:1.13;letter-spacing:-.043em;text-align:center;max-width:1000px;margin:0 auto}
.title-brand{color:var(--accent);font-weight:600}
.authors{text-align:center;margin:28px 0 36px;font-size:17px}
.authors p{margin:0}
.author-list{display:grid;grid-template-columns:repeat(4,max-content);justify-content:center;gap:8px 28px}
.authors sup{font-size:.68em;color:var(--accent);margin-left:2px}
.affiliations{display:flex;flex-wrap:wrap;justify-content:center;gap:3px 20px;max-width:880px;margin:20px auto 8px;color:var(--muted);font-size:13px;line-height:1.8}
.affiliations span{white-space:nowrap}
.affiliations sup{margin:0 4px 0 0}
.authors .author-note{font-size:12px;color:var(--muted);margin-top:8px}
.project-links{display:flex;justify-content:center;gap:12px;margin:-12px 0 32px}
.resource-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:102px;min-height:42px;padding:7px 20px;border:1px solid #c5d0c2;border-radius:6px;background:#fffefa;color:var(--accent);font-size:14px;font-weight:500;text-decoration:none;transition:background .2s,border-color .2s}
.resource-button[href]:hover{background:#edf3e9;border-color:var(--accent)}
.resource-button .resource-icon{width:18px;height:18px;flex:0 0 18px;opacity:.8}
.resource-button.is-disabled{color:#8a9186;border-color:#dfe4da;background:#f4f4ee;cursor:default}
.tldr{max-width:900px;margin:0 auto;padding:20px 25px;border-left:3px solid var(--accent);background:var(--surface);font-size:19px;line-height:1.65}
.tldr strong{color:var(--accent);margin-right:8px;letter-spacing:.025em}
.section{margin-top:68px;scroll-margin-top:28px}
.section+.section{padding-top:42px;border-top:1px solid var(--line)}
.section-heading{display:flex;justify-content:center;align-items:center;gap:14px;margin-bottom:24px;flex-direction:column;text-align:center}
h2{font-size:clamp(29px,3vw,37px);line-height:1.2;letter-spacing:-.03em;margin:0}
.section-index{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.video-frame{max-width:740px;margin:0 auto;overflow:hidden;border:1px solid var(--line);border-radius:6px;background:#151915}
video{display:block;width:100%;height:auto;aspect-ratio:1;object-fit:contain}
figure{margin:0}
.figure-image{display:block;background:#fff;line-height:0;border:1px solid var(--line);border-radius:4px;overflow:hidden}
img{display:block;width:100%;height:auto}
.figure-link{flex-shrink:0;font-size:12px;text-decoration:none}
.figure-link:hover{text-decoration:underline}
figcaption{font-size:17px;line-height:1.75;color:#384039;margin:18px 2px 0}
.footer{margin-top:76px;padding:24px 0 32px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px;color:var(--muted);font-size:12px}
.footer>a{text-decoration:none}
.credit{font-size:11px}
@media(min-width:1600px){.wrap{width:min(1180px,calc(100% - 120px))}h1{font-size:64px;max-width:1060px}}
@media(max-width:650px){.wrap{width:calc(100% - 36px)}.masthead{min-height:66px}nav{gap:17px;font-size:12px}.hero{padding-top:38px}h1{font-size:36px;letter-spacing:-.035em}.authors{margin:23px 0 28px;font-size:15px}.tldr{padding:16px 18px;font-size:16px}.section{margin-top:44px}.section+.section{padding-top:32px}.section-heading{margin-bottom:18px;gap:12px;flex-wrap:wrap}h2{font-size:30px}.figure-link{font-size:11px}figcaption{font-size:15px}.footer{margin-top:50px;flex-wrap:wrap}.credit{order:3;flex-basis:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media(max-width:650px){.author-list{grid-template-columns:repeat(2,max-content);gap:7px 24px}.affiliations{flex-direction:column;gap:3px;font-size:12px;margin-top:17px}.affiliations span{white-space:normal}}

.motivation .section-heading{max-width:850px;margin-inline:auto;margin-bottom:36px}
.needs-list{list-style:none;counter-reset:needs;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin:0;padding:0}
.needs-list li{--card-accent:#47654a;--card-tint:#edf3e9;counter-increment:needs;position:relative;display:flex;flex-direction:column;padding:28px 26px 24px;margin:0;border:1px solid #dfe6da;border-radius:16px;background:linear-gradient(150deg,#fff 65%,#f7f9f3);box-shadow:0 3px 5px #243c2510,0 16px 32px -22px #243c2538;transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease}
.needs-list li:nth-child(2){--card-accent:#536b86;--card-tint:#edf1f7;background:linear-gradient(150deg,#fff 65%,#f5f7fa)}
.needs-list li:nth-child(3){--card-accent:#8b7350;--card-tint:#f5efe5;background:linear-gradient(150deg,#fff 65%,#faf8f2)}
.needs-list li::before{content:counter(needs,decimal-leading-zero);display:grid;place-items:center;width:42px;height:42px;border-radius:11px;background:var(--card-tint);color:var(--card-accent);font-size:14px;font-weight:650;letter-spacing:.05em;margin-bottom:24px}
.needs-list li::after{content:"";position:absolute;right:27px;top:32px;width:23px;height:23px;border:1px solid var(--card-accent);border-radius:5px;opacity:.28;box-shadow:7px -7px 0 -1px var(--card-tint),7px -7px 0 0 var(--card-accent);transform:rotate(-7deg)}
.needs-list h3{font-size:23px;line-height:1.3;font-weight:600;min-height:2.6em;margin:0 0 15px;letter-spacing:-.035em}
.needs-list p{margin:0 0 24px;font-size:16px;line-height:1.8;color:#444d43}
.needs-list strong{font-weight:600;color:var(--ink)}
.need-summary{margin-top:auto;padding-top:16px;border-top:1px solid #e4e9e0;color:var(--card-accent);font-size:15px;font-weight:600;letter-spacing:.01em}
@media(hover:hover) and (prefers-reduced-motion:no-preference){.needs-list li:hover{transform:translateY(-7px);border-color:#bccbb8;box-shadow:0 6px 12px #243c2510,0 24px 38px -20px #243c2538}}
@media(max-width:950px){.needs-list{grid-template-columns:1fr;max-width:740px;margin-inline:auto}.needs-list h3{min-height:0}.needs-list li{padding:26px 28px}.needs-list li::before{margin-bottom:18px}}
@media(prefers-reduced-motion:reduce){.needs-list li{transition:none}}
.citation-toolbar{display:flex;align-items:center;justify-content:space-between;background:var(--surface);border:1px solid var(--line);border-bottom:0;padding:10px 18px;font-size:13px;color:var(--muted)}
#copy-citation{font:inherit;color:var(--accent);background:var(--paper);border:1px solid #c5d0c2;border-radius:4px;padding:7px 12px;cursor:pointer}
#copy-citation:hover{background:#e9efe6}
#copy-citation:focus-visible,.citation-block:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.citation-block{margin:0;padding:22px;background:var(--surface);border:1px solid var(--line);font-size:14px;line-height:1.8;overflow:auto;color:#384039;white-space:pre-wrap;overflow-wrap:anywhere}
.copy-status{min-height:1.7em;margin:8px 0 0;font-size:13px;color:var(--accent)}
@media(max-width:650px){nav{gap:12px;font-size:11px}.needs-list{gap:18px}.needs-list li{padding:24px 22px;margin:0}.needs-list h3{font-size:20px}.needs-list p{font-size:16px}.citation-block{font-size:12px;padding:16px}.section-heading{text-align:center}.credit{font-size:12px}}