@font-face{font-family:"Notebook Barlow";src:url("notebook-fonts/barlow-condensed-700-normal.woff2") format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Notebook Atkinson";src:url("notebook-fonts/atkinson-hyperlegible-400-normal.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Notebook Atkinson";src:url("notebook-fonts/atkinson-hyperlegible-700-normal.woff2") format("woff2");font-weight:700;font-display:swap}
/* PRIVATE UNREVIEWED DRAFT. B + grid styling applied to the local draft after the trial; no page or release approval. */
body.notebook-study{--ink:#3a2a1a;--text:#48371f;--muted:#6a5336;--paper:#e8d8b5;--white:#f6ebd2;--line:#bda477;--copper:#7c5209;--orange:#c56f25;--font-display:'Notebook Barlow',Impact,Arial,sans-serif;--font-body:'Notebook Atkinson',Arial,sans-serif;background:#e8d8b5;color:#3a2a1a}
.notebook-study .header{background:#e8d8b5;color:#3a2a1a;border-bottom:2px solid #48371f}
.notebook-study .brand,.notebook-study .header nav a{color:#3a2a1a}
.notebook-study .brand small{color:#6a5336}
.notebook-study main{background:#f6ebd2;border-left:10px solid #dc9a1a;box-shadow:4px 5px 0 #bda477;margin-top:22px;margin-bottom:34px;padding:42px 36px 65px;width:min(calc(100% - 42px),1060px);max-width:1060px}
.notebook-study main h1{font-size:clamp(40px,5vw,66px);letter-spacing:-.015em;text-transform:none}
.notebook-study main h2{font-size:clamp(29px,3vw,35px)}
.notebook-study .eyebrow{color:#7c5209;letter-spacing:.08em}
.notebook-study .notice{background:#deb899;border:1px solid #7c5209;border-left:4px solid #7c5209;border-radius:1px;color:#3a2a1a}
.notebook-study .notice.danger{background:#deb899;border-color:#b3261b}
.notebook-study .tool-card,.notebook-study .tool-note,.notebook-study .card{background:#f6ebd2;border:1px solid #bda477;box-shadow:2px 3px 0 #d5c199;border-radius:1px}
.notebook-study .diagram{background:#f6ebd2;border:1px solid #a08860;box-shadow:3px 5px 0 #d5c199;border-radius:1px}
.notebook-study .diagram img{background:#f6ebd2}
.notebook-study .diagram figcaption{color:#6a5336;font-size:14px}
.notebook-study .button{background:#dc9a1a;color:#1b1b1b;border-radius:3px}
.notebook-study a{color:#7c5209}
.notebook-study footer{background:#3a2a1a}
@media(max-width:700px){.notebook-study main{width:calc(100% - 24px);margin:16px 12px 24px;padding:24px 18px 48px;border-left-width:7px}.notebook-study .tool-columns{grid-template-columns:1fr}.notebook-study .diagram{padding:10px}}

/* Landing layout stays section-led, not a single framed sheet. Preserve the same field-notebook colors and card rules. */
.notebook-study main:has(>.hero){background:transparent;border:0;box-shadow:none;margin:0;width:auto;max-width:none;padding:0}
.notebook-study main:has(>.hero) .hero{background:#f6ebd2;border-bottom:1px solid #bda477}
.notebook-study main:has(>.hero) .hero-grid>div:first-child{border-left:9px solid #dc9a1a;padding-left:24px}
.notebook-study main:has(>.hero) .hero img{border:1px solid #bda477;border-radius:2px;box-shadow:4px 5px 0 #bda477}
.notebook-study main:has(>.hero) .section:nth-child(odd){background:#f6ebd2}
.notebook-study .card{color:#3a2a1a}
.notebook-study .tag{color:#7c5209}
.notebook-study .chip{background:#f6ebd2;border-color:#bda477;color:#3a2a1a;border-radius:3px}
.notebook-study .chip[aria-pressed="true"]{background:#3a2a1a;color:#fff}
.notebook-study .tool-hero img{border-radius:2px;box-shadow:3px 5px 0 #bda477}
.notebook-study .photo-pair figure{border-radius:1px;border-color:#bda477}
.notebook-study .photo-pair img{border-radius:1px}
@media(max-width:700px){.notebook-study main:has(>.hero) .hero-grid>div:first-child{padding-left:17px;border-left-width:7px}.notebook-study main:has(>.hero) .hero img{max-width:100%}}

/* Human-edited field illustration with an explicit technical boundary. */
/* Selected house artwork: retain label detail in a keyboard-scrollable frame. */
.notebook-study .hero-grid:has(>.home-field-figure){grid-template-columns:1fr}
.notebook-study .home-field-figure{margin:0;min-width:0;max-width:100%;align-self:center}
.notebook-study .home-field-scroll{overflow-x:auto;max-width:100%;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch;border:1px solid #bda477}
.notebook-study .hero .home-field-figure .home-field-scroll img{display:block;width:100%;max-width:none;height:auto;border:0;box-shadow:none}
.notebook-study .home-field-hint,.notebook-study .home-field-figure figcaption{margin:10px 2px 0;font-size:16px;line-height:1.5;color:#6a5336}
.notebook-study .home-field-hint a{display:inline-block;min-height:44px;padding-block:10px}
.notebook-study .home-field-key{margin-top:12px;font-size:17px}
.notebook-study .home-field-key summary{min-height:44px;padding-block:10px;cursor:pointer;font-weight:700}
.notebook-study .home-field-key ul{columns:2;column-gap:36px;padding-left:28px}
.notebook-study .home-field-key li{break-inside:avoid}
@media(max-width:700px){.notebook-study .hero .home-field-figure .home-field-scroll img{min-width:1536px}.notebook-study .home-field-key ul{columns:1}}


/* LOCAL HOMEPAGE MOTION STUDY: all content stays visible without JS or motion. */
.system-story{padding:60px 0;background:#f6ebd2;border-bottom:1px solid #bda477}.system-story>.wrap>p{max-width:64ch}.system-story-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:start}.system-story-art{position:relative;align-self:start;border:1px solid #bda477;background:#f6ebd2;padding:10px}.system-story-art img{display:block;width:100%;height:auto}.system-story-state{font-size:16px;font-weight:700;margin:10px 4px;color:#513814}.system-story-steps article{border-top:1px solid #bda477;padding:35px 0 40px}.system-story-steps h3{font-size:30px;line-height:1.2;margin:12px 0}.system-story-steps a{display:inline-flex;align-items:center;min-height:44px;font-weight:700}.system-story-focus{display:none}.system-story-footnote{font-size:14px;color:#6a5336}.system-story.motion-enabled .system-story-art{position:sticky;top:30px}.system-story.motion-enabled .system-story-focus{display:block;position:absolute;border:2px solid #7c5209;border-radius:4px;background:#b8733310;pointer-events:none;transition:left 250ms ease,top 250ms ease,width 250ms ease,height 250ms ease}.system-story.motion-enabled article{transition:border-color 250ms ease}.system-story article.is-active{border-top:3px solid #7c5209;padding-top:33px}@media(max-width:800px){.system-story{padding:36px 0}.system-story-layout{grid-template-columns:1fr;gap:12px}.system-story-art{position:relative!important;top:auto!important}.system-story-focus{display:none!important}.system-story-steps article{padding:24px 0}.system-story-steps h3{font-size:28px}}@media(prefers-reduced-motion:reduce){.system-story-art{position:relative!important;top:auto!important}.system-story-focus{display:none!important}.system-story article{transition:none!important}}

.system-story-drawing{position:relative}.system-story.motion-enabled .system-story-steps article{min-height:65vh}.system-story[data-active-system=cooling] .system-story-focus{left:4.8%;top:59%;width:19.5%;height:17.5%}.system-story[data-active-system=heating] .system-story-focus{left:34%;top:34%;width:20%;height:9.2%}.system-story[data-active-system=water] .system-story-focus{left:73.4%;top:64.8%;width:6.4%;height:10.3%}.system-story[data-active-system=power] .system-story-focus{left:69.7%;top:55.2%;width:25.8%;height:20.9%}

input:not([type=checkbox]):not([type=radio]):not([type=hidden]),select{min-height:44px;box-sizing:border-box}input[type=checkbox],input[type=radio]{min-width:24px;min-height:24px;width:24px;height:24px;flex:0 0 24px}label:has(input[type=checkbox]),label:has(input[type=radio]){min-height:44px;display:flex;align-items:center;gap:8px}

#checklist li{display:flex;align-items:center;gap:8px}#checklist label{display:flex;align-items:center;min-height:44px;flex:1}#wc-form input,#ds-form input{width:100%;max-width:100%}

.system-story:not(.motion-enabled) .system-story-state{display:none}

/* Phone already has the same house drawing in the hero. Keep system notes, not a duplicate image. */
@media(max-width:800px){.system-story-art{display:none}.system-story-layout{display:block}}
/* Native date-picker subcontrols need a visible container focus ring too. */
.notebook-study input[type=date]:focus-within{outline:3px solid var(--copper);outline-offset:3px}

@media(max-width:700px){.notebook-study .header nav{gap:0 6px}.notebook-study .header nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 6px}.notebook-study .brand{display:inline-flex;align-items:center;min-height:44px}}
/* Margin note: a short journal side note placed just before the point it sits beside (Andrew, Oct 11, 2026). Full width on phones; floats right beside the following text on wide screens. */
.related>a:not(.button){display:inline-block;padding:10px 0}
.margin-note{background:#f6ebd2;border:1px solid #bda477;border-left:4px solid #dc9a1a;box-shadow:2px 3px 0 #d5c199;padding:12px 14px;margin:12px 0;font-size:16px;line-height:1.5;color:#48371f}
.margin-note p{margin:0}
.margin-note .margin-note-label{margin:0 0 4px;font-family:Georgia,serif;font-style:italic;color:#7c5209}
@media (min-width:980px){.margin-note{float:right;width:260px;margin:4px 0 16px 28px;transform:rotate(-.6deg)}}

/* Email updates signup (build switch: docs/email-signup.json). */
.email-signup{display:grid;gap:8px;max-width:440px;margin-top:8px}
.email-signup label{font-weight:700}
.email-signup input{min-height:48px;padding:10px 12px;font:inherit;border:2px solid var(--ink,#3a2a1a);border-radius:8px;background:#fff;color:var(--ink,#3a2a1a)}
.email-signup button{min-height:48px;padding:10px 16px;font:700 1.05rem/1 "Notebook Barlow","Barlow Condensed",sans-serif;letter-spacing:.3px;border:0;border-radius:8px;background:#136a62;color:#fff;cursor:pointer}
.email-signup input:focus-visible,.email-signup button:focus-visible{outline:3px solid #c56f25;outline-offset:2px}