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html{scroll-behavior:smooth;scroll-padding-top:104px}
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a:hover{color:#666}
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::selection{background:#dedede;color:#111}
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.brand-mark img{display:block;width:34px;height:34px;object-fit:contain;filter:brightness(0)}
.edition{font-size:13px;color:#737373}
.article-header{text-align:center;max-width:1040px;padding:78px 32px 68px;margin:auto}
.publication-meta{display:flex;gap:18px;align-items:center;justify-content:center;font-size:14px;line-height:1.5;margin-bottom:32px}
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h1{font-size:clamp(38px,4.1vw,62px);line-height:1.085;letter-spacing:-2.4px;font-weight:440;margin:0;text-wrap:balance}
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.contents a{color:#777;text-decoration:none;display:block}
.contents a:hover,.contents a[aria-current="location"]{color:#111}
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.paper p.opening{font-size:19px;line-height:1.73;letter-spacing:-.1px}
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.paper .section-deck{font-size:18px;color:var(--muted);margin-top:-15px;margin-bottom:27px}
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sup{font-size:11px;line-height:0}
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.paper figure h4{font-size:16px;font-weight:560;line-height:1.5;letter-spacing:-.1px;margin:26px 0 17px}
figure img{display:block;width:100%;height:auto}
figure picture{display:block}
.paper figcaption{font-size:12px;line-height:1.7;color:#777;margin-top:19px;overflow-wrap:anywhere}
.paper figcaption a{text-decoration-color:#bcbcbc}
/* The approved scan artwork sits directly on the reading surface. */
.editorial-visual{margin:39px 0;scroll-margin-top:110px}
.editorial-visual img{mix-blend-mode:multiply}
.brain-visual img{max-width:100%;margin:0}
.paper .editorial-visual figcaption{margin:12px 0 0;font-size:12px;line-height:1.6}
.paper .brain-visual figcaption{text-align:left}
.paper .voice-visual h4{margin:0 0 8px;font-size:18px;line-height:1.4;font-weight:570;letter-spacing:-.2px}
.voice-visual img{margin:0}
@media(max-width:640px){.editorial-visual{margin:32px 0}.paper .voice-visual h4{font-size:17px}.paper .editorial-visual figcaption{margin-top:10px}}
@media print{.editorial-visual{break-inside:avoid;margin:24px 0}.brain-visual img,.voice-visual img{max-width:100%;margin:0}}
.metric-pair{display:grid;grid-template-columns:1fr 1fr;gap:32px;padding:8px 0 30px;border-bottom:1px solid var(--faint);margin-bottom:29px}
.metric-pair strong{font-size:42px;font-weight:470;line-height:1.15;letter-spacing:-1.4px;display:block;margin-bottom:10px}
.metric-pair>div:first-child strong{color:var(--blue)}
.metric-pair>div:last-child strong{color:var(--blue)}
.metric-pair span{font-size:14px;line-height:1.5;color:var(--muted);display:block}
.chart-legend{display:flex;align-items:center;gap:24px;flex-wrap:wrap;font-size:13px;line-height:1.4;margin-bottom:3px}
.chart-legend>span{display:flex;align-items:center;gap:8px}
#figure-1 .metric-pair{column-gap:0;text-align:center}
#figure-1 .metric-pair>div{padding-inline:8px}
#figure-1 picture{margin-top:22px}
#figure-1 figcaption{margin-top:14px}
.swatch{display:inline-block;width:10px;height:10px;border-radius:50%;flex:none}
.swatch.treatment{background:var(--blue)}.swatch.untreated{background:var(--light-gray)}
.personalization-stat{display:grid;grid-template-columns:130px minmax(0,1fr);align-items:start;gap:30px;margin:33px 0 24px;padding-top:27px;border-top:1px solid var(--faint)}
.personalization-stat>strong{color:var(--blue);font-size:64px;font-weight:470;line-height:1.1;letter-spacing:-2px}
.paper .personalization-stat p{font-size:16px;line-height:1.7;margin:0}
.personalization-stat+.footnote{margin-top:0}
.system-figure{padding:29px 0 0;background:transparent;border-top:1px solid var(--faint)}
/* The three numbered stages keep inputs separate from the coaching process. */
.coaching-flow{list-style:none;margin:29px 0 23px;padding:0}
.coaching-flow>li{position:relative;display:grid;grid-template-columns:28px minmax(0,1fr);gap:16px;padding-bottom:29px}
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.flow-number{display:grid;place-items:center;width:28px;height:28px;color:var(--blue);font-size:17px;line-height:1;font-weight:550}
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.paper .flow-body h4{font-size:17px;line-height:1.4;font-weight:590;margin:0 0 12px;letter-spacing:-.15px}
.flow-inputs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px;margin:0}
.flow-inputs dt{font-size:14px;font-weight:580;line-height:1.45;margin:0 0 7px}
.flow-inputs dd{font-size:14px;line-height:1.6;color:var(--muted);margin:0}
.paper .flow-body p,.paper .coaching-feedback p{font-size:14px;line-height:1.65;margin:0}
.paper .flow-decision h4{color:var(--blue)}
.paper .flow-body .flow-example{margin-top:11px;color:var(--muted)}
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.coaching-feedback>span{font-size:25px;line-height:1.2;color:var(--blue);text-align:center}
.paper .coaching-feedback p{color:var(--muted)}
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.paper .organization-inputs p{font-size:14px;line-height:1.6;color:var(--muted);margin:0}
.tools-list{margin:25px 0 34px}
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.organization-inputs>div:nth-child(2){--component-color:var(--gray)}
.organization-inputs>div:nth-child(3){--component-color:var(--light-gray)}
.paper .organization-output h4{color:var(--blue)}
.paper .organization-inputs h4{font-size:16px;line-height:1.4;margin:0 0 11px}
.organization-output{margin-top:28px;border-top:1px solid #ccc;padding-top:23px}
.paper .organization-output h4{font-size:18px;margin:0 0 8px}
.paper .organization-output p{font-size:14px;color:var(--muted);margin:0}
.paper .source-link{font-size:13px;line-height:1.6;margin-top:-10px;margin-bottom:36px;color:var(--muted)}
.source-link a{text-decoration-color:#ccc}
.paper-footer{border-top:1px solid var(--faint);margin-top:70px;padding:29px 0 65px;display:flex;justify-content:space-between;gap:24px;color:var(--muted);font-size:13px}
.paper-footer a{text-decoration:none}
.skip-link{position:fixed;z-index:100;top:8px;left:8px;transform:translateY(-150%);background:#171717;color:#fff;padding:10px 15px}
.skip-link:focus{transform:translateY(0)}

/* Compact full-article playback, following the supplied OpenAI reference. */
[hidden]{display:none!important}
button{font:inherit;cursor:pointer}
button:disabled{cursor:default;opacity:.45}
.audio-reader{margin:0 0 35px;position:relative;line-height:1.5}
.audio-controls{display:flex;align-items:center;flex-wrap:wrap;gap:6px 8px;min-height:44px}
.audio-toggle,.audio-skip{display:inline-flex;align-items:center;justify-content:center;flex:none;width:44px;height:44px;padding:0;border:0;background:transparent;color:var(--ink)}
.audio-toggle{margin-left:-11px;border-radius:50%}
.audio-toggle:hover,.audio-skip:hover{color:var(--blue)}
.audio-toggle svg,.audio-skip svg{flex:none}
.pause-symbol{display:none}
[data-state="speaking"] .play-symbol,[data-state="loading"] .play-symbol{display:none}
[data-state="speaking"] .pause-symbol,[data-state="loading"] .pause-symbol{display:inline}
.audio-caption{font-size:14px;white-space:nowrap}
.audio-time{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap;margin-left:5px}
.audio-playback-tools{display:flex;align-items:center;gap:3px;margin-left:3px}
.audio-speed{display:inline-flex;align-items:center;justify-content:center;min-width:48px;min-height:28px;margin:8px 0 8px 5px;padding:3px 10px;border:1px solid var(--ink);border-radius:16px;background:transparent;color:var(--ink);font-size:13px;line-height:1.4}
.audio-speed:hover{color:var(--blue);border-color:var(--blue)}
.audio-reader progress{display:block;width:100%;height:2px;margin:10px 0 0;border:0;overflow:hidden;background:var(--faint);color:var(--blue);accent-color:var(--blue);appearance:none}
.audio-reader progress::-webkit-progress-bar{background:var(--faint)}
.audio-reader progress::-webkit-progress-value{background:var(--blue)}
.audio-reader progress::-moz-progress-bar{background:var(--blue)}
.paper .audio-status{font-size:13px;line-height:1.5;color:var(--muted);margin:12px 0 0}
.paper .audio-credit{font-size:12px;line-height:1.5;color:var(--muted);margin:3px 0 0}
.audio-skip:disabled{opacity:.35;cursor:default}
@media(max-width:640px){.flow-inputs{grid-template-columns:1fr;gap:15px}.flow-inputs dt{margin-bottom:3px}.coaching-flow>li{gap:13px;padding-bottom:26px}.coaching-feedback{gap:13px}.paper .flow-body h4{font-size:16px}.audio-playback-tools{gap:0;margin-left:0}.audio-time{margin-left:0}.audio-reader{margin-bottom:29px}}

@media(max-width:1120px){.reading-layout{display:block;margin:0 auto;max-width:744px;padding:0 32px}.contents{display:none}.mobile-contents{display:block;border-top:1px solid var(--faint);border-bottom:1px solid var(--faint);margin:0 0 33px;padding:0;font-size:14px}.mobile-contents summary{display:flex;align-items:center;justify-content:space-between;padding:17px 0;cursor:pointer;list-style:none}.mobile-contents summary::-webkit-details-marker{display:none}.mobile-contents[open] summary span{transform:rotate(45deg)}.mobile-contents nav{padding:5px 0 14px}.mobile-contents li{margin:0 0 12px}.mobile-contents a{text-decoration:none;color:#666}.article-meta{padding-bottom:24px}}
@media(max-width:640px){body{font-size:16px;line-height:1.75}.site-header{height:65px;padding:0 22px}.edition{font-size:12px}.article-header{padding:56px 22px 45px}.publication-meta{font-size:13px;margin-bottom:25px;gap:14px}h1{font-size:39px;line-height:1.1;letter-spacing:-1.6px}.desktop-break{display:none}.reading-layout{padding:0 22px}.article-meta{font-size:12px;padding-top:19px;gap:12px}.paper p.opening{font-size:18px;line-height:1.72}.paper h2{font-size:27px;line-height:1.3;margin-top:58px;margin-bottom:22px;letter-spacing:-.65px}.paper h3{font-size:20px;margin-top:33px}.paper .section-deck{font-size:16px}.research-figure,.system-figure{margin-top:32px;margin-bottom:32px}.metric-pair{gap:22px;padding-top:5px;padding-bottom:23px}.metric-pair strong{font-size:31px;letter-spacing:-1px}.metric-pair span{font-size:13px}.paper figure h3{font-size:19px}.paper figure h4{font-size:15px}.chart-legend{font-size:12px;gap:15px}.figure-topline{font-size:12px}.paper figcaption{font-size:12px}.system-figure{padding:23px 0 0}.organization-inputs{grid-template-columns:1fr;gap:19px}.organization-inputs>div+div{border-top:2px solid var(--component-color);padding-top:17px}.paper-footer{flex-wrap:wrap;padding-bottom:40px;font-size:12px}}
@media(max-width:640px){.personalization-stat{grid-template-columns:1fr;gap:13px}.personalization-stat>strong{font-size:57px;letter-spacing:-1.6px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header,.contents,.mobile-contents,.skip-link,.audio-reader{display:none!important}.article-header{padding:20px 0 36px}h1{font-size:34pt}.reading-layout{display:block;margin:0;padding:0}.paper{max-width:none}.article-meta{padding:16px 0 25px}.paper-section{scroll-margin:0}.paper h2{break-after:avoid;font-size:22pt}.paper h3{break-after:avoid;font-size:16pt}.research-figure,.system-figure{break-inside:avoid;margin:28px 0}.paper p{orphans:3;widows:3}.paper-footer{padding-bottom:0}.paper-footer a{display:none}body{font-size:11pt;line-height:1.65}@page{margin:20mm}}