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@media(max-width:520px){.hero h1{font-size:clamp(66px,21.3vw,83px);letter-spacing:-.075em}.hero-dek{font-size:31px;max-width:360px}.hero-photo img{height:405px;border-radius:120px 120px 2px 2px;object-position:50% 52%}.hero-photo figcaption{font-size:11px}.hero-photo figcaption>span:last-child{font-size:10px}.headline-stats>div{padding-inline:13px}.stat-number{font-size:48px}.stat-unit{margin-left:3px}.headline-stats p:last-child{font-size:11px;line-height:1.5;max-width:110px}.section-space{padding-block:60px}.section-heading h2{font-size:39px}.story-main h2{font-size:38px}.section-index{font-size:10px;margin-bottom:17px}.chapter-nav{gap:22px}.story-main .large-copy{font-size:22px}.hardware-note{gap:18px}.hardware-note p{font-size:13px}.chart-panel{padding:20px 14px}.chart-toolbar{flex-direction:column;gap:18px;margin-bottom:22px}.select-label{flex-direction:row;align-items:center;font-size:12px;gap:15px}.chart-toolbar select{min-height:44px}.activity-panel .legend{font-size:11px;gap:12px}.legend>span{gap:6px}.legend>span:before{width:16px}.activity-chart{min-height:195px}.chart-readout{column-gap:16px;row-gap:4px;min-height:70px;padding-block:10px}.chart-readout>strong{width:100%}.hour-control{gap:10px;flex-wrap:wrap;font-size:11px}.hour-control>span{display:none}.hour-control output{min-width:73px}.hour-control input{width:calc(100% - 84px)}.chart-caption{font-size:11px}.split-insights{grid-template-columns:1fr;gap:27px;margin-top:30px}.split-insights h3{font-size:27px}.split-insights p{margin-top:12px}.movement-duration h3{font-size:32px}.duration-row{gap:13px}.duration-row strong{font-size:29px;min-width:64px}.photo-interlude{gap:19px}.photo-interlude figure img{height:285px}.photo-interlude figcaption{font-size:11px}.pull-quote{font-size:31px}.interlude-copy{padding-bottom:15px}.sleep-period{padding:25px 17px}.period-title{margin-bottom:26px;gap:15px}.period-title h3{font-size:28px}.sleep-bar-row{grid-template-columns:38px 1fr 83px;gap:13px;font-size:12px}.sleep-bar-row strong{font-size:25px}.sleep-bar-row small{font-size:9px}.rest-total>p{gap:22px;font-size:11px}.rest-total strong{font-size:18px}.overlap-intro{grid-template-columns:1fr;gap:18px;padding-top:52px}.overlap-number{font-size:106px}.overlap-intro h3{font-size:34px}.overlap-legend{gap:13px;font-size:10px}.overlap-controls{flex-direction:column;align-items:stretch;gap:15px}.overlap-time-label{width:100%}.overlap-chart{margin-top:20px;overflow:visible}.overlap-readout{font-size:12px}.method-columns{grid-template-columns:1fr;gap:29px}.method-facts{gap:28px 0}.method-facts>div{padding-left:18px}.method-facts strong{font-size:34px}.method-facts strong span{font-size:15px}.method-facts>div>span{font-size:11px}.sensitivity-control{flex-wrap:wrap;gap:10px}.sensitivity-result{gap:28px}.weight-plan{padding:25px;gap:20px}.next-layout h2{font-size:40px}.source-list{font-size:13px}.site-footer p{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.trace-peach,.trace-toast{stroke-dashoffset:0}}

.activity-section :focus-visible,.next-section :focus-visible{outline-color:var(--paper)}

.hero>*{min-width:0}.hardware-photo{flex:0 0 132px;align-self:center}.hardware-photo img{width:100%;height:auto;border-radius:2px}@media(max-width:520px){.hardware-photo{flex-basis:88px}}

.legend .legend-human-sleep:before{height:12px;background:rgba(181,138,67,.18);border:1px dashed var(--ochre)}.human-sleep-tag{display:inline-block;margin-left:10px;padding:2px 7px;background:rgba(181,138,67,.18);color:var(--ink);font:11px/1.5 var(--sans)}

.legend .legend-meal:before{height:0;background:none;border-top:2px dashed var(--muted)}.activity-panel .legend-meal:before{border-color:var(--paper)}.overlap-legend .legend-toast:before,.overlap-legend .legend-peach:before{height:10px}.legend .legend-missing:before{height:10px;background:repeating-linear-gradient(135deg,var(--paper-deep),var(--paper-deep) 3px,var(--stone) 3px,var(--stone) 4px)}.meal-routine{display:grid;grid-template-columns:1fr 1.65fr;gap:65px;padding:30px 0 4px}.meal-routine h3{font-size:28px;max-width:280px}.meal-routine p{font-size:17px;color:#c5beb0;max-width:660px}.meal-routine .meal-context{font:12px/1.65 var(--sans);margin-top:12px;color:#bdb6a9}@media(max-width:800px){.meal-routine{grid-template-columns:1fr;gap:14px}.meal-routine h3{max-width:none}}

.method-detail{border-top:1px solid var(--line);padding-top:30px}.method-detail h3{font-size:28px;margin-bottom:20px}.method-detail+.method-detail{margin-top:8px}@media(max-width:520px){.method-detail h3{font-size:26px}}

/* Detailed charts retain a fixed height while the time axis scrolls. */
.detail-controls{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin:22px 0;font:12px Arial,Helvetica,sans-serif}
.detail-controls label{display:flex;align-items:center;gap:9px}
.detail-controls select{font:inherit;min-height:40px;padding:8px;color:inherit;background:transparent;border:1px solid currentColor;border-radius:4px}
.detail-controls select option{color:#1D1C19;background:#F4F1EA}
.detail-controls>span{opacity:.7}
#activity-chart,#overlap-chart{overflow-x:auto;overflow-y:hidden;max-width:100%;scrollbar-width:thin}
#activity-chart svg,#overlap-chart svg{display:block;flex:none}
.activity-line{stroke-width:1.4}
@media(max-width:520px){.detail-controls{gap:12px}.detail-controls>span{width:100%}.hour-control output{min-width:90px}.hour-control input{width:calc(100% - 104px)}}

.chart-scroll-frame{position:relative}.fixed-chart-axis{position:absolute;top:0;left:0;pointer-events:none;font-family:Arial,Helvetica,sans-serif;z-index:1}.chart-scroll-frame #overlap-chart{margin-top:0}

.activity-detail-line{stroke-width:.7;opacity:.5}.activity-average-line{stroke-width:2;opacity:1}