/* The educational page owns its layout; commercial and 3D surfaces are untouched. */
body[data-demo-layout=essentials]{margin:0;background:#f7f5f2}
body[data-demo-layout=essentials] #main{display:block;padding:0;max-width:none;margin:0}
body[data-demo-layout=essentials] .skip-link{position:fixed;top:-80px;left:15px;z-index:100;padding:12px;background:#fff;color:#92400e}
body[data-demo-layout=essentials] .skip-link:focus{top:10px}
#essential-demo{--e-ink:var(--brand-ink,#1b1c1a);--e-muted:var(--brand-soft,#65665f);--e-line:var(--brand-line,#e5dfd6);--e-accent:var(--brand-accent,#c44e12);font:16px/1.6 Inter,system-ui,sans-serif;color:var(--e-ink);background:#f7f5f2}
#essential-demo *,#essential-demo *::before,#essential-demo *::after{box-sizing:border-box}
#essential-demo [hidden]{display:none!important}
#essential-demo .site-header{position:relative;top:auto;border-bottom:1px solid var(--e-line);background:#fbf9f6}
#essential-demo .header-inner{max-width:1384px;margin:auto;min-height:64px;display:flex;align-items:center;justify-content:space-between;padding:10px 32px}
#essential-demo a{color:#92400e;text-underline-offset:4px}
#essential-demo .header-section{display:flex;gap:22px;align-items:center}
#essential-demo .header-section a{font-size:14px;min-height:44px;display:inline-flex;align-items:center;text-decoration:none}
#essential-demo .e-brand{display:flex;align-items:center;gap:15px;text-decoration:none;color:var(--e-ink)}
#essential-demo .brand-mark{display:block;flex:none;width:24px;height:24px;border:5px solid var(--e-accent);transform:rotate(45deg);border-radius:3px;background:none}
#essential-demo .brand{display:grid;line-height:1.4}#essential-demo .brand strong{letter-spacing:.05em;font-size:16px}#essential-demo .brand small{font-size:12px;color:var(--e-muted)}
#essential-demo .essential-content{width:calc(100% - 64px);max-width:1320px;margin:auto}
#essential-demo .overview{padding:19px 0 0;scroll-margin-top:12px}
#essential-demo .intro{display:flex;align-items:center;justify-content:space-between;gap:25px;margin:0 0 14px}
#essential-demo h1,#essential-demo h2,#essential-demo h3,#essential-demo h4,#essential-demo h5{font-family:inherit;line-height:1.2;letter-spacing:-.025em;color:var(--e-ink);margin:0;text-transform:none}
#essential-demo h1{font-size:clamp(27px,2.6vw,36px);font-weight:600;margin:0}
#essential-demo .eyebrow{font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--e-muted);margin:0}
#essential-demo .intro-copy{font-size:16px;color:var(--e-muted);margin:0;max-width:410px}
#essential-demo figure{margin:0}
#essential-demo .bath-figure{width:min(100%,1100px,calc(max(400px,100svh - 190px)*1.75));border:1px solid var(--e-line);border-radius:10px;overflow:hidden;background:#fff;margin:0 auto}
#essential-demo .e-overview-image{position:relative;aspect-ratio:1659/948;isolation:isolate;display:block;width:100%;border:0;padding:0;cursor:zoom-in;background:#ddd7cd}
#essential-demo .e-hero-enlarge{position:absolute;bottom:12px;right:12px;display:block;padding:8px 12px;border-radius:6px;background:#fbf9f6f5;color:#41372e;border:1px solid #cfc3b1;font:500 14px/1.4 Inter,system-ui,sans-serif}
#essential-demo .e-overview-image>img{display:block;width:100%;height:100%;object-fit:contain}
#essential-demo .e-zones{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
#essential-demo .e-zones polygon{fill:#ffdb9b;fill-opacity:0;stroke:#fff7e7;stroke-opacity:0;stroke-width:.28;transition:fill-opacity .18s,stroke-opacity .18s;vector-effect:non-scaling-stroke}
#essential-demo .e-zones polygon.is-highlighted{fill-opacity:.22;stroke-opacity:.95;stroke-width:2}
#essential-demo .room-key{display:grid;grid-template-columns:var(--room-columns,36% 23% 41%);padding:7px 0;background:#fbf9f6;line-height:1.3}
#essential-demo .room-key>span{text-align:center;display:grid;gap:2px;border-right:1px solid var(--e-line)}#essential-demo .room-key>span:last-child{border:0}
#essential-demo .room-key strong{font-size:15px;font-weight:600}#essential-demo .room-key small{font-size:13px;color:var(--e-muted)}
#essential-demo .e-parts-nav{position:sticky;top:0;z-index:35;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));background:#fbf9f6;border-bottom:1px solid var(--e-line);padding:10px 0;gap:8px;margin-top:12px;box-shadow:0 5px 12px #47321d08}
#essential-demo .e-parts-nav a{display:flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:8px 12px;border-radius:6px;text-decoration:none;font-weight:500;font-size:15px;color:#3b3b36;border:1px solid transparent}
#essential-demo .e-parts-nav a span{color:#948879;font-size:12px}
#essential-demo .e-parts-nav a:hover,#essential-demo .e-parts-nav a[aria-current=location]{background:#f2e8da;color:#923b11;border-color:#e0c9ae}
#essential-demo .e-guide{font-size:14px;color:var(--e-muted);margin:14px 0 0}
#essential-demo .e-detail{padding:36px 0 24px;border-bottom:1px solid var(--e-line);scroll-margin-top:82px}
#essential-demo .e-detail-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:26px}
#essential-demo .detail-number{display:block;font-size:12px;font-weight:500;letter-spacing:.08em;margin:0 0 10px;color:#a76834}
#essential-demo .e-detail h2{font-size:clamp(26px,2.5vw,34px);font-weight:600;max-width:870px}
#essential-demo .e-return{flex:none;display:inline-flex;align-items:center;min-height:44px;font-size:14px;text-decoration:none}
#essential-demo .e-detail-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:38px;align-items:start}
#essential-demo .e-detail-grid>figure{position:sticky;top:86px}
#essential-demo .e-detail-grid figcaption{padding:10px 0 0;font-size:13px;color:var(--e-muted)}
#essential-demo .e-photo{position:relative;display:block;width:100%;padding:0;border:1px solid var(--e-line);border-radius:9px;overflow:hidden;background:#f4f2ee;cursor:zoom-in;color:var(--e-ink);font:inherit;text-align:left;box-shadow:none}
#essential-demo .e-photo img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:contain;transition:filter .15s}
#essential-demo .e-enlarge{position:absolute;right:9px;bottom:9px;padding:5px 9px;font-size:12px;font-weight:500;border:1px solid #ded5c6;background:#fbf9f6;border-radius:4px;line-height:1.5}
#essential-demo .e-photo:hover{border-color:#be9d76}#essential-demo .e-photo:hover img{filter:brightness(1.025)}
#essential-demo .e-inline-preview{margin-top:14px}
#essential-demo .e-preview-options{display:flex;gap:8px;flex-wrap:wrap}
#essential-demo .e-preview-options button{font:500 14px/1.4 Inter,system-ui,sans-serif;min-height:44px;border:1px solid #d9cdbc;border-radius:6px;padding:10px 14px;background:#fbf9f6;color:#4b4136;cursor:pointer}
#essential-demo .e-preview-options button[aria-pressed=true]{background:#eee0cd;border-color:#bd9466;color:#883c13}
#essential-demo #heating .e-preview-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
#essential-demo .e-preview-copy{font-size:14px;line-height:1.6;min-height:3.2em;margin:10px 0 0;color:var(--e-muted)}
#essential-demo .e-photo[aria-busy=true]{cursor:progress}
#essential-demo .e-real-examples{margin-top:12px}
#essential-demo .e-source-options,#essential-demo .e-real-options{display:flex;gap:8px;flex-wrap:wrap}
#essential-demo .e-source-options button,#essential-demo .e-real-options button{font:500 15px/1.4 Inter,system-ui,sans-serif;min-height:44px;border:1px solid var(--e-line);border-radius:7px;padding:10px 14px;background:#fbf9f6;color:var(--e-ink);cursor:pointer}
#essential-demo .e-source-options button[aria-pressed=true],#essential-demo .e-real-options button[aria-pressed=true]{background:#f2e8da;border-color:#c44e12;color:#923b11}
#essential-demo .e-real-options{margin-top:10px}
#essential-demo .e-real-options[hidden],#essential-demo .e-inline-preview[hidden]{display:none}
#essential-demo .e-real-caption{font-size:15px;line-height:1.6;color:var(--e-muted);margin:10px 0 0}
#essential-demo .e-room-copy .e-real-examples{margin:0 0 20px;max-width:100%}
#essential-demo .e-intro{font-size:19px;line-height:1.65;color:#3d3e38;margin:0 0 20px}
#essential-demo .e-explanation ul{list-style:none;margin:0;padding:0;display:grid;gap:17px}
#essential-demo .e-explanation li{display:grid;gap:4px;padding-left:16px;border-left:2px solid #ddc8ad}
#essential-demo .e-explanation strong{font-size:17px;font-weight:600}#essential-demo .e-explanation li span{font-size:16px;line-height:1.65;color:var(--e-muted)}
#essential-demo .e-comparisons{display:grid;grid-template-columns:repeat(var(--comparison-count),minmax(0,1fr));gap:32px;margin-top:32px}
#essential-demo .e-comparison--wide{grid-column:1/-1}
#essential-demo .e-comparison{min-width:0;padding-top:22px;border-top:1px solid var(--e-line)}
#essential-demo .e-comparison h3{font-size:21px;font-weight:600;margin-bottom:16px}
#essential-demo .e-samples{display:grid;grid-template-columns:repeat(var(--sample-count),minmax(0,1fr));gap:18px}
#essential-demo .e-sample{min-width:0}
#essential-demo .e-sample h4{font-size:17px;font-weight:600;margin-top:13px;line-height:1.4}
#essential-demo .e-sample p{font-size:15px;line-height:1.6;color:var(--e-muted);margin:7px 0 0}
#essential-demo .e-compare-note{font-size:14px;line-height:1.6;color:var(--e-muted);margin:16px 0 12px}
#essential-demo .e-calculator-link{display:inline-flex;align-items:center;justify-content:space-between;gap:20px;min-height:44px;text-decoration:none;border-bottom:1px solid #caa67c;font-size:15px;font-weight:500;padding:8px 0}
#essential-demo .e-calculator-link:hover{color:var(--e-accent);border-color:var(--e-accent)}
#essential-demo .e-next{display:flex;justify-content:flex-end;margin-top:24px}#essential-demo .e-next a{display:inline-flex;min-height:44px;align-items:center;font-size:14px;text-decoration:none}
#essential-demo .essential-secondary{scroll-margin-top:86px;padding-top:35px}
#essential-demo .section-heading{margin-bottom:22px}#essential-demo .section-heading h2{font-size:30px}#essential-demo .section-heading p{color:var(--e-muted);margin:10px 0}
#essential-demo .source-note{font-size:13px;line-height:1.65;color:var(--e-muted);max-width:1000px;padding:0 0 25px}
#essential-demo .essential-next{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:30px 0;border-top:1px solid var(--e-line);margin-top:30px}
#essential-demo .essential-next h2{font-size:26px}#essential-demo .essential-next p{font-size:16px;color:var(--e-muted);margin:10px 0 0}
#essential-demo .essential-next>a,#essential-demo .bath3d-launch button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;border:0;border-radius:6px;padding:12px 20px;background:#c44e12;color:#fff;font:500 16px/1.5 Inter,system-ui,sans-serif;text-decoration:none;cursor:pointer}
#essential-demo #bath-full-3d{border:1px solid var(--e-line);border-radius:10px;background:#fbf9f6;overflow:hidden}
#essential-demo #bath-full-3d>summary,#essential-demo .bath3d-poster-actions,#essential-demo .bath3d-badge,#essential-demo .bath3d-mobile-label{display:none}
#essential-demo #bath3d-poster{display:grid;grid-template-columns:1fr 1fr;gap:28px;padding:18px;align-items:center}
#essential-demo #bath3d-poster>img{display:block;width:100%;height:auto;border-radius:5px}
#essential-demo .bath3d-launch small{display:block;font-size:15px;line-height:1.6;color:var(--e-muted);margin-top:12px}
#essential-demo #bath3d-status,#essential-demo #bath3d-fallback{padding:10px 20px}
#essential-demo #bath3d-mount iframe{display:block;width:100%;height:clamp(440px,75svh,800px);border:0}
#essential-demo .e-three-close{display:block;margin:10px 15px 10px auto;border:1px solid var(--e-line);border-radius:5px;padding:10px 14px;background:#fbf9f6;font:inherit;cursor:pointer}
#essential-demo footer{border-top:1px solid var(--e-line);padding:24px max(32px,calc((100vw - 1320px)/2));display:flex;justify-content:space-between;gap:20px;font-size:13px}
#essential-demo :is(a,button):focus-visible{outline:3px solid #c44e12;outline-offset:4px}
#essential-demo .e-image-dialog{position:fixed;inset:0;width:min(1200px,calc(100vw - 36px));height:min(900px,calc(100dvh - 36px));max-width:none;max-height:none;margin:auto;padding:0;border:1px solid var(--e-line);border-radius:12px;background:#fbf9f6;color:var(--e-ink);overflow:hidden}
#essential-demo .e-image-dialog[open]{display:flex;flex-direction:column}
#essential-demo .e-image-dialog::backdrop{background:#211a13b8}
#essential-demo .e-image-dialog>header{flex:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px 20px;background:#fbf9f6;border-bottom:1px solid var(--e-line)}
#essential-demo .e-image-dialog h2{font-size:18px;line-height:1.4;max-width:850px}
#essential-demo .e-viewer-actions{display:flex;gap:9px;flex:none}
#essential-demo .e-image-dialog :is([data-close-image],[data-image-zoom]){flex:none;border:1px solid #cbbda9;background:white;min-height:44px;padding:9px 14px;border-radius:6px;font:500 15px/1.4 Inter,system-ui,sans-serif;cursor:pointer}
#essential-demo .e-image-body{position:relative;flex:1;min-height:0;overflow:auto;touch-action:auto;background:var(--image-surface,#fbf9f6)}
#essential-demo .e-image-canvas{display:grid;place-items:center;min-width:100%;min-height:100%;width:100%;height:100%}
#essential-demo .e-image-canvas>img{display:block;object-fit:contain;max-width:none;transition:opacity .12s;user-select:none}
#essential-demo .e-image-dialog[data-zoomed=true] .e-image-body{cursor:grab;touch-action:pan-x pan-y pinch-zoom}
#essential-demo .e-image-dialog[data-dragging=true] .e-image-body{cursor:grabbing}
#essential-demo .e-viewer-hint{flex:none;text-align:center;font-size:12px;margin:0;padding:7px 12px;background:#fbf9f6;color:var(--e-muted)}
#essential-demo .e-image-body>p{position:absolute;inset:auto 20px;text-align:center;background:#fbf9f6ed;border-radius:8px;padding:14px;z-index:1}
#essential-demo .e-overview-image{cursor:default}
#essential-demo .e-overview-image>img{height:100%;object-fit:contain}
#essential-demo .e-room-hit{position:absolute;top:27%;height:45%;padding:0;border:0;background:transparent;cursor:pointer;z-index:2}
#essential-demo .e-room-hit--steam{left:5%;width:34%}
#essential-demo .e-room-hit--wash{left:39%;width:20%}
#essential-demo .e-room-hit--rest{left:59%;width:37%}
#essential-demo .e-room-hit:hover,#essential-demo .e-room-hit:focus-visible{outline:2px solid #fff8;outline-offset:-4px;background:#fff3}
#essential-demo .e-hero-enlarge{z-index:3;cursor:zoom-in}
#essential-demo .room-key>button{display:grid;gap:2px;min-width:0;padding:8px 4px;border:0;border-right:1px solid var(--e-line);background:transparent;color:var(--e-ink);font:inherit;cursor:pointer;text-align:center}
#essential-demo .room-key>button:last-child{border-right:0}
#essential-demo .room-key>button[aria-pressed=true]{background:#f2e6d7;box-shadow:inset 0 -3px #c44e12}
#essential-demo .room-key>button:hover{background:#f5eadc}
#essential-demo .room-key strong{font-size:15px;font-weight:600}
#essential-demo .room-key small{font-size:13px;color:var(--e-muted)}
#essential-demo .e-rooms{margin:18px 0 26px;scroll-margin-top:20px}
#essential-demo .e-room-panel{display:grid;grid-template-columns:minmax(0,1.48fr) minmax(320px,.8fr);gap:0;overflow:hidden;border:1px solid var(--e-line);border-radius:10px;background:#fcfaf7}
#essential-demo .e-room-photo{min-width:0;background:#eee5d7}
#essential-demo .e-room-photo .e-photo{border:0;border-radius:0;height:100%;background:#eee5d7}
#essential-demo .e-room-photo img{aspect-ratio:1659/948;height:100%;object-fit:contain}
#essential-demo .e-room-copy{padding:clamp(20px,3vw,40px);display:flex;flex-direction:column;justify-content:center;align-items:flex-start}
#essential-demo .e-room-overline{display:block;margin-bottom:10px;color:#a05b2d;font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase}
#essential-demo .e-room-copy h2{font-size:clamp(26px,2.5vw,34px)}
#essential-demo .e-room-copy>p{font-size:16px;line-height:1.7;color:#4a4a43;margin:14px 0 18px}
#essential-demo .e-room-links{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px}
#essential-demo .e-room-links a{padding:8px 11px;border:1px solid #ddcbb8;border-radius:5px;text-decoration:none;font-size:14px;background:#fffaf5}
#essential-demo .e-room-copy>small{color:var(--e-muted);font-size:12px;line-height:1.5}
#essential-demo .e-material-return{display:inline-flex;align-items:center;min-height:42px;margin:0 0 5px;padding:7px 13px;border:1px solid #d9c6af;border-radius:6px;background:#fff9f1;font-size:14px;text-decoration:none}
#essential-demo .e-compare-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px}
#essential-demo .e-location-link{display:inline-flex;align-items:center;min-height:44px;font-size:14px;text-decoration:none;border-bottom:1px solid #ddc5a9}
#essential-demo .e-junctions{padding:42px 0 30px;scroll-margin-top:85px;border-bottom:1px solid var(--e-line)}
#essential-demo .e-junction-heading h2{font-size:clamp(27px,2.5vw,34px)}
#essential-demo .e-junction-heading p{margin:10px 0 18px;color:var(--e-muted)}
#essential-demo .e-junction-tabs{display:flex;gap:8px;margin-bottom:17px;flex-wrap:wrap}
#essential-demo .e-junction-tabs button{min-height:44px;padding:9px 15px;border:1px solid #ddcbbb;border-radius:6px;background:#fbf9f6;color:#49423a;font:500 14px/1.4 Inter,system-ui,sans-serif;cursor:pointer}
#essential-demo .e-junction-tabs button[aria-pressed=true]{background:#efe0ce;border-color:#bf8a61;color:#8b3f1c}
#essential-demo .e-junction-panel{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,.8fr);gap:0;border:1px solid var(--e-line);border-radius:10px;background:#fcfaf7;overflow:hidden}
#essential-demo .e-junction-stage{position:relative;align-self:stretch;background:#ede6db}
#essential-demo .e-junction-stage>img{display:block;width:100%;height:100%;aspect-ratio:3/2;object-fit:contain}
#essential-demo .e-spot{position:absolute;left:var(--spot-x);top:var(--spot-y);transform:translate(-50%,-50%);width:38px;height:38px;border-radius:50%;border:2px solid #fff;background:#ae4f20;color:#fff;font:600 14px/1 Inter,system-ui,sans-serif;box-shadow:0 2px 11px #3b29174d;cursor:pointer}
#essential-demo .e-spot[aria-pressed=true]{background:#fff;color:#923b11;border-color:#a54b21;box-shadow:0 0 0 5px #c44e1233}
#essential-demo .e-junction-enlarge{position:absolute;bottom:12px;right:12px;z-index:2;padding:8px 10px;border:1px solid #d6c3af;border-radius:5px;background:#fff9f2ef;color:#5f3d25;font:500 13px/1.4 Inter,system-ui,sans-serif;cursor:zoom-in}
#essential-demo .e-junction-copy{padding:clamp(20px,3vw,36px)}
#essential-demo .e-junction-copy h3{font-size:24px}
#essential-demo .e-junction-copy>p{font-size:15px;line-height:1.65;color:var(--e-muted)}
#essential-demo .e-spot-list{list-style:none;padding:0;margin:22px 0 10px;display:grid;gap:5px}
#essential-demo .e-spot-list button{display:flex;align-items:center;gap:10px;width:100%;min-height:41px;padding:7px 8px;border:0;border-radius:5px;background:transparent;text-align:left;color:#3e3b34;font:500 15px/1.4 Inter,system-ui,sans-serif;cursor:pointer}
#essential-demo .e-spot-list button:hover,#essential-demo .e-spot-list button[aria-pressed=true]{background:#f0e5d7}
#essential-demo .e-spot-list span{font-size:12px;color:#a45429}
#essential-demo .e-spot-description{min-height:3em;margin:11px 0 16px;padding-left:12px;border-left:2px solid #c44e12;color:#3d3d36!important}
#essential-demo .e-junction-copy>a{font-size:14px;text-decoration:none}
html.e-photo-open{overflow:hidden;scrollbar-gutter:stable}
@media(max-width:1000px){#essential-demo .e-detail-grid{gap:25px}#essential-demo .e-comparisons{gap:24px}#essential-demo .e-intro{font-size:18px}#essential-demo .e-samples{gap:12px}}
@media(max-width:760px){
 #essential-demo .header-inner{min-height:58px;padding:6px 16px}#essential-demo .header-section{gap:12px}#essential-demo .header-section a{font-size:12px}#essential-demo .e-brand{gap:11px}#essential-demo .brand strong{font-size:13px}#essential-demo .brand small{font-size:10px}#essential-demo .brand-mark{width:20px;height:20px;border-width:4px}
 #essential-demo .essential-content{width:calc(100% - 24px)}#essential-demo .overview{padding-top:18px}#essential-demo .intro{display:block;margin:0 4px 14px}#essential-demo .intro-copy{margin-top:8px;font-size:14px}#essential-demo h1{font-size:27px}#essential-demo .eyebrow{font-size:10px}
 #essential-demo .bath-figure{width:100%}#essential-demo .e-hero-enlarge{font-size:12px;bottom:7px;right:7px;padding:6px 9px}
 #essential-demo .room-key{grid-template-columns:repeat(3,minmax(0,1fr));padding:7px 0}#essential-demo .room-key strong{font-size:11px}#essential-demo .room-key small{font-size:10px}
 #essential-demo .e-parts-nav{grid-template-columns:repeat(3,minmax(0,1fr));gap:2px;padding:4px 0;margin-top:8px}#essential-demo .e-parts-nav a{min-height:44px;font-size:13px;padding:7px 4px;gap:6px}#essential-demo .e-parts-nav a span{font-size:10px}
 #essential-demo .e-guide{font-size:13px;margin-top:10px}#essential-demo .e-detail{padding-top:28px;scroll-margin-top:108px}#essential-demo .e-detail-heading{display:block;margin-bottom:17px}#essential-demo .e-detail h2{font-size:26px}#essential-demo .e-return{margin-top:8px;font-size:13px;min-height:36px}
 #essential-demo .e-detail-grid{display:block}#essential-demo .e-detail-grid>figure{position:static;margin:0 0 20px}#essential-demo .e-detail-grid figcaption{font-size:12px}
 #essential-demo .e-intro{font-size:17px}#essential-demo .e-explanation strong{font-size:16px}#essential-demo .e-explanation li span{font-size:15px}#essential-demo .e-explanation ul{gap:15px}
 #essential-demo .e-comparisons{grid-template-columns:1fr;gap:25px;margin-top:24px}#essential-demo .e-comparison h3{font-size:20px}#essential-demo .e-samples{gap:12px}#essential-demo .e-sample h4{font-size:15px}#essential-demo .e-sample p{font-size:14px}#essential-demo .e-compare-note{font-size:13px}
 #essential-demo .e-samples[style*="3"]{grid-template-columns:1fr}#essential-demo .e-samples[style*="3"] .e-sample{display:grid;grid-template-columns:42% minmax(0,1fr);column-gap:14px;align-items:start;padding-bottom:15px;border-bottom:1px solid var(--e-line)}#essential-demo .e-samples[style*="3"] .e-photo{grid-row:span 2}#essential-demo .e-samples[style*="3"] h4{margin-top:0}#essential-demo .e-samples[style*="3"] p{margin-top:5px}
 #essential-demo .e-photo--sample .e-enlarge{font-size:0;padding:3px 6px;bottom:5px;right:5px}#essential-demo .e-photo--sample .e-enlarge::after{content:'↗';font-size:14px}
 #essential-demo .essential-secondary{scroll-margin-top:108px}#essential-demo footer{display:block;padding:20px 16px}#essential-demo footer a{display:block;margin-top:10px}
 #essential-demo .essential-next{display:block}#essential-demo .essential-next>a{margin-top:18px}#essential-demo #bath3d-poster{grid-template-columns:1fr;gap:16px;padding:14px}
 #essential-demo .e-image-dialog{width:calc(100vw - 16px);height:calc(100dvh - 24px);border-radius:8px}#essential-demo .e-image-dialog>header{padding:10px;gap:10px;flex-wrap:wrap}#essential-demo .e-image-dialog h2{font-size:15px;flex:1;min-width:130px}#essential-demo .e-viewer-actions{gap:6px}#essential-demo .e-image-dialog :is([data-close-image],[data-image-zoom]){font-size:13px;padding:8px}
 #essential-demo .room-key>button{padding:8px 2px;min-height:49px}#essential-demo .room-key strong{font-size:11px}#essential-demo .room-key small{font-size:10px}
 #essential-demo .e-room-hit{top:22%;height:50%}#essential-demo .e-rooms{margin:12px 0 18px}
 #essential-demo .e-room-panel,#essential-demo .e-junction-panel{grid-template-columns:1fr}
 #essential-demo .e-room-copy,#essential-demo .e-junction-copy{padding:18px}
 #essential-demo .e-room-copy>p{font-size:15px;margin:10px 0 13px}
 #essential-demo .e-room-photo img{height:auto}#essential-demo .e-room-links{margin-bottom:12px}
 #essential-demo .e-junctions{padding-top:30px}#essential-demo .e-junction-tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px}#essential-demo .e-junction-tabs button{min-height:42px;padding:6px;font-size:12px}
 #essential-demo .e-junction-stage>img{height:auto}#essential-demo .e-spot{width:33px;height:33px;font-size:12px}
}
@media(prefers-reduced-motion:reduce){#essential-demo *{transition:none!important;scroll-behavior:auto!important}}
/* Stage 1 (2026-09-23): shared site navigation, project context and honest No.05 scope. */
#essential-demo .header-inner{gap:24px}
#essential-demo .e-site-nav{display:flex;align-items:center;gap:4px;min-width:0}
#essential-demo .e-site-nav a{font-size:14px;min-height:44px;display:inline-flex;align-items:center;padding:0 10px;border-radius:6px;text-decoration:none;color:var(--e-ink);white-space:nowrap}
#essential-demo .e-site-nav a:hover{color:var(--e-accent)}
#essential-demo .e-site-nav a[aria-current=page]{color:#92400e;background:#f8eee6;font-weight:600}
#essential-demo .e-phone{font-size:14px;font-weight:600;white-space:nowrap;text-decoration:none;color:var(--e-ink)}
#essential-demo .e-project-context{margin:0 0 18px;padding:12px 16px;border:1px solid #e0b18c;border-radius:8px;background:#fbf3ec;font-size:15px;line-height:1.55;color:#3d3d36}
#essential-demo .e-project-context a{color:#92400e;font-weight:600;white-space:nowrap}
#essential-demo .essential-next-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:flex-end}
#essential-demo .essential-next-actions>a{display:inline-flex;align-items:center;justify-content:center;min-height:48px;border-radius:6px;padding:12px 20px;background:#c44e12;color:#fff;font:500 16px/1.5 Inter,system-ui,sans-serif;text-decoration:none}
#essential-demo .essential-next-actions>a.e-secondary{background:transparent;color:var(--e-ink);border:1px solid var(--e-line)}
@media(max-width:1180px){#essential-demo .e-phone{display:none}#essential-demo .e-site-nav a{padding:0 7px;font-size:13px}}
@media(max-width:1000px){
 #essential-demo .header-inner{flex-wrap:wrap;gap:4px 16px}
 #essential-demo .e-site-nav{order:3;width:100%;overflow-x:auto;scrollbar-width:none;margin:0 -4px}
 #essential-demo .e-site-nav::-webkit-scrollbar{display:none}
}
@media(max-width:760px){
 #essential-demo .e-site-nav a{font-size:13px;min-height:40px;padding:0 9px}
 #essential-demo .e-project-context{font-size:14px;padding:10px 12px}
 #essential-demo .essential-next-actions{justify-content:flex-start;margin-top:18px}
 #essential-demo .essential-next-actions>a{width:100%}
}
/* 5.1 progress + single-row parts navigation on phones */
#essential-demo .e-parts-nav{position:sticky}
#essential-demo .e-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:transparent;pointer-events:none}
#essential-demo .e-progress i{display:block;height:100%;background:#c44e12;transform:scaleX(0);transform-origin:left;transition:transform .1s linear}
@media(max-width:760px){
 #essential-demo .e-parts-nav{display:flex;overflow-x:auto;scrollbar-width:none;gap:4px;padding:6px 0}
 #essential-demo .e-parts-nav::-webkit-scrollbar{display:none}
 #essential-demo .e-parts-nav a{flex:none;min-height:40px;padding:6px 12px}
 #essential-demo .e-parts-nav .e-progress{display:none}
}
#essential-demo .e-parts-nav a span{color:#6f6557}
#essential-demo .detail-number,#essential-demo .e-room-overline,#essential-demo .e-spot-list span{color:#7d4a1f}

/* Typography pass 2026-09-28 */
#essential-demo{font-size:17px}
#essential-demo .header-section a,#essential-demo .e-site-nav a,#essential-demo .e-phone{font-size:15px}
#essential-demo .brand strong{font-size:17px}#essential-demo .brand small{font-size:13px}#essential-demo .eyebrow{font-size:13px}
#essential-demo .room-key strong{font-size:16px}#essential-demo .room-key small{font-size:14px}
#essential-demo .e-parts-nav a{font-size:16px}#essential-demo .e-parts-nav a span{font-size:13px}#essential-demo .e-guide{font-size:15px}
#essential-demo .detail-number,#essential-demo .e-room-overline{font-size:13px}#essential-demo .e-return{font-size:15px}#essential-demo .e-detail-grid figcaption{font-size:14px}#essential-demo .e-enlarge{font-size:13px}
#essential-demo .e-preview-copy,#essential-demo .e-compare-note,#essential-demo .e-next a,#essential-demo .e-junction-copy>a,#essential-demo .e-room-links a,#essential-demo .e-material-return,#essential-demo .e-location-link{font-size:15px}
#essential-demo .e-sample p,#essential-demo .e-junction-copy>p{font-size:16px}#essential-demo .source-note{font-size:14px}#essential-demo footer{font-size:14px}
#essential-demo .e-viewer-hint{font-size:13px}#essential-demo .e-room-copy>small{font-size:13px}#essential-demo .e-spot-list span{font-size:13px}#essential-demo .e-project-context{font-size:16px}
@media(max-width:760px){
 #essential-demo .header-section a,#essential-demo .e-site-nav a{font-size:14px}#essential-demo .brand strong{font-size:15px}#essential-demo .brand small{font-size:11px}#essential-demo .eyebrow{font-size:12px}
 #essential-demo .intro-copy{font-size:16px}#essential-demo .room-key strong{font-size:13px}#essential-demo .room-key small{font-size:12px}#essential-demo .e-parts-nav a{font-size:14px}#essential-demo .e-parts-nav a span{font-size:12px}
 #essential-demo .e-guide,#essential-demo .e-return,#essential-demo .e-sample p,#essential-demo .e-compare-note,#essential-demo .e-room-copy>p{font-size:15px}#essential-demo .e-detail-grid figcaption{font-size:14px}#essential-demo .e-junction-tabs button{font-size:14px}#essential-demo .e-project-context{font-size:15px}
}

#essential-demo .e-image-nav{flex:none;display:flex;align-items:center;justify-content:center;gap:12px;padding:8px 12px max(8px,env(safe-area-inset-bottom));border-top:1px solid var(--e-line);background:#fbf9f6}
#essential-demo .e-image-nav[hidden]{display:none}#essential-demo .e-image-nav button{min-height:44px;padding:8px 12px;border:1px solid #cbbda9;border-radius:6px;background:white;font:500 14px/1.4 Inter,system-ui,sans-serif;cursor:pointer}
#essential-demo .e-image-nav span{font-size:14px;white-space:nowrap}#essential-demo .e-image-dialog[data-zoomed=false] .e-image-body{touch-action:auto}

/* Keep diagrams clickable without a separate enlarge button. */
#essential-demo .e-overview-image>.e-photo,#essential-demo .e-junction-stage>.e-photo{height:100%;border:0;border-radius:inherit}#essential-demo .e-overview-image>.e-photo>img,#essential-demo .e-junction-stage>.e-photo>img{width:100%;height:100%;object-fit:contain}
#essential-demo .e-overview-image>.e-photo{position:absolute;inset:0}