:root{color-scheme:light;--paper:#f3f0e8;--ink:#25362e;--muted:#58675c;--line:#d8dacf;--sage:#647b67;--gold:#806436;--serif:Georgia,"Times New Roman",serif;--sans:Arial,"Segoe UI",sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:auto}
body{margin:0;min-width:320px;background:var(--paper);color:var(--ink);font:15px/1.5 var(--sans);-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:4px}
button,input{font:inherit}
button,a,input{-webkit-tap-highlight-color:transparent}
button,a{touch-action:manipulation}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #7c591e;outline-offset:4px}
[hidden]{display:none!important}
::selection{background:#d7dfcd}
.experience{height:400svh;position:relative}
.stage{position:sticky;top:0;height:100svh;min-height:0;display:flex;flex-direction:column;padding:0 clamp(20px,4vw,72px);overflow:hidden;background:var(--paper)}
.site-header{flex:none;min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}
.wordmark{display:inline-flex;gap:5px;align-items:center;text-decoration:none;font-weight:800;font-size:17px;letter-spacing:-.055em;white-space:nowrap;min-height:44px}
.wordmark b{font-weight:500}
.brand-mark{background:var(--ink);color:var(--paper);display:grid;place-items:center;width:25px;height:25px;margin-right:7px;font-size:20px;line-height:1;border-radius:3px}
.header-label{font-size:11px;letter-spacing:.1em;color:var(--muted)}
.back-link{font-size:13px;text-decoration:none;display:inline-flex;align-items:center;min-height:44px;white-space:nowrap}
.back-link:hover{color:#7c591e}
.intro{display:flex;align-items:center;justify-content:space-between;gap:24px;flex:none;padding:23px 0 12px}
.eyebrow{font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin:0 0 9px}
h1{font:400 clamp(35px,4.25vw,64px)/1.08 var(--serif);letter-spacing:-.045em;margin:0}
h1 em,.lesson h2 em{font-weight:400;color:var(--sage);font-style:italic}
.intro-caption{font-size:13px;line-height:1.6;margin:0;color:var(--muted);max-width:220px}
.scene-layout{flex:1;display:flex;min-height:0;gap:30px}
.scene-wrap{flex:1;min-width:0;min-height:0;position:relative;background:radial-gradient(ellipse at 48% 45%,#fcfaf5 0%,#f3f0e8 72%)}
#scene{display:block;position:absolute;inset:0;width:100%;height:100%;outline:0}
.plan-overlay{display:block;position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
.scene-label{position:absolute;top:12px;left:2px;z-index:1;pointer-events:none;color:#58675c;font-size:12px;letter-spacing:.1em}
.scene-note{align-self:center;flex:0 0 210px;padding:10px 0 26px 10px}
.stage-number{font-size:12px;font-variant-numeric:tabular-nums;letter-spacing:.12em;color:var(--gold)}
.scene-note h2{font:400 36px/1.15 var(--serif);letter-spacing:-.035em;margin:16px 0 14px}
.scene-note>p{color:var(--muted);font-size:14px;line-height:1.65;margin:0;min-height:70px}
.note-rule{width:38px;height:1px;background:var(--gold);margin:24px 0 16px}
.scene-note .note-caption{font-size:12px;line-height:1.65;min-height:0}
.status-row{flex:none;display:flex;align-items:center;gap:20px}
.render-status{margin:0;padding:8px 0;color:var(--muted);font-size:12px;line-height:1.5}
.render-status:empty{display:none}
.fallback-link{display:none;align-items:center;min-height:44px;font-size:13px;white-space:nowrap}
.scene-fallback{position:absolute;inset:0;display:grid;place-items:center}
.fallback-drawing{position:relative;width:min(100%,546px);aspect-ratio:760/640}
.fallback-drawing svg{display:block;width:100%;height:100%}
.fallback-room-label,.fallback-dimension{position:absolute;transform:translateX(-50%);background:var(--paper);padding:1px 4px;color:#304a39;font-size:14px;font-weight:600;line-height:1.3;white-space:nowrap}
.fallback-room-label.living{left:37%;top:80%}
.fallback-room-label.kitchen{left:68%;top:21%}
.fallback-dimension{left:50%;top:95%;font-size:13px;font-weight:400}
.controls{padding:10px 0 12px;border-top:1px solid var(--line);flex:none;width:100%;max-width:1180px;align-self:center}
.progress-heading{display:flex;justify-content:space-between;align-items:center;font-size:12px;letter-spacing:.05em;text-transform:uppercase}
.progress-heading output{font-variant-numeric:tabular-nums;color:#486249}
input[type=range]{width:100%;height:28px;margin:4px 0 2px;cursor:pointer;accent-color:var(--ink)}
.stage-buttons{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:7px}
.stage-buttons button{border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:4px;padding:7px 10px;min-height:44px;cursor:pointer;font-size:13px;text-align:left;display:flex;align-items:center;gap:9px;transition:background .15s,color .15s,border-color .15s}
.stage-buttons button span{color:var(--muted);font-size:11px;font-variant-numeric:tabular-nums}
.stage-buttons button:hover{background:#e6e9de;border-color:#b1baa9}
.stage-buttons button[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:#f9f6ee}
.stage-buttons button[aria-pressed=true] span{color:#d5dfcd}
.stage-buttons button:disabled{cursor:default;background:#e6e9de;color:var(--muted)}
.control-hint{text-align:center;font-size:12px;color:var(--muted);line-height:1.4;margin:7px 0 0}
.control-hint span{color:var(--gold);padding-right:6px}
.lesson{max-width:1240px;padding:100px clamp(20px,4vw,72px) 90px;margin:auto;display:grid;grid-template-columns:1.1fr 1fr;gap:100px;border-top:1px solid var(--line)}
.lesson h2{font:400 clamp(32px,3.5vw,48px)/1.13 var(--serif);letter-spacing:-.04em;margin:17px 0 24px}
.lesson-intro>p:not(.eyebrow){font-size:15px;line-height:1.8;color:var(--muted);max-width:480px}
.primary-link{display:inline-flex;align-items:center;justify-content:space-between;gap:28px;min-height:48px;text-decoration:none;background:var(--ink);color:#f9f6ee;padding:13px 18px;border-radius:4px;font-size:13px;margin-top:18px}
.primary-link:hover{background:#425547}
.lesson-steps{list-style:none;margin:0;padding:0}
.lesson-steps li{display:flex;gap:24px;padding:18px 0;border-top:1px solid var(--line)}
.lesson-steps li>span{font-size:12px;color:var(--gold);padding-top:4px}
.lesson-steps h3{font:400 24px/1.2 var(--serif);margin:0 0 6px}
.lesson-steps p{font-size:14px;color:var(--muted);margin:0;max-width:340px}
.project-footer{padding:30px clamp(20px,4vw,72px) 40px;display:flex;justify-content:space-between;gap:70px;border-top:1px solid var(--line);font-size:13px}
.project-footer strong{font-weight:600;letter-spacing:.06em}
.project-footer p{max-width:670px;color:var(--muted);line-height:1.8;margin:9px 0 0}
.project-footer>a{white-space:nowrap;align-self:start;display:inline-flex;align-items:center;min-height:44px}
.noscript-note{padding:25px;color:var(--ink);border-top:1px solid var(--line)}
body[data-renderer=fallback] .experience{height:auto}
body[data-renderer=fallback] .stage{position:relative;height:auto;overflow:visible}
body[data-renderer=fallback] .scene-layout{flex:none}
body[data-renderer=fallback] .scene-wrap{height:460px;flex:auto}
body[data-renderer=fallback] .scene-label{display:none}
body[data-renderer=fallback] .fallback-link{display:inline-flex}
body[data-renderer=fallback] .controls{display:none}
@media(min-width:1600px){.scene-note{flex-basis:250px}.scene-note h2{font-size:42px}.intro{padding-top:30px}.scene-layout{gap:60px}}
@media(max-width:900px){
 .stage{padding:0 25px}.intro-caption{display:none}.header-label{font-size:10px;letter-spacing:.06em}
 .scene-layout{flex-direction:column;gap:0}.scene-note{align-self:stretch;flex:none;display:grid;grid-template-columns:auto 1fr;column-gap:12px;align-items:baseline;padding:8px 0 12px;border-top:1px solid var(--line)}
 .scene-note h2{font-size:26px;margin:0}.scene-note>p{grid-column:1/-1;font-size:13px;line-height:1.45;min-height:38px;margin-top:5px;max-width:650px}.note-rule,.scene-note .note-caption{display:none}
 .lesson{gap:45px;padding-top:75px;padding-bottom:70px}.stage-buttons button{gap:5px;padding:7px}.scene-label{display:none}
 body[data-renderer=fallback] .scene-wrap{height:420px;flex:none}
 .fallback-drawing{width:min(100%,498px)}
}
@media(max-width:600px){
 .stage{padding:0 16px}.site-header{min-height:53px;gap:10px}.header-label{display:none}.wordmark{font-size:15px}.brand-mark{width:22px;height:22px;font-size:18px}.back-link{font-size:13px}
 .intro{padding:13px 0 8px}.eyebrow{font-size:10px;letter-spacing:.08em;margin-bottom:6px}h1{font-size:30px;line-height:1.08;max-width:380px}h1 em{display:block}
 .scene-layout{justify-content:center}.scene-wrap{min-height:250px;max-height:360px}.scene-note{column-gap:10px;padding:8px 0 10px}.stage-number{font-size:11px}.scene-note h2{font-size:23px}.scene-note>p{font-size:12px;min-height:35px;line-height:1.45;max-width:420px}
 .controls{padding-top:8px;padding-bottom:9px}.progress-heading{font-size:11px;letter-spacing:.025em}.stage-buttons{gap:4px}.stage-buttons button{font-size:11px;min-height:44px;justify-content:center;gap:0;padding:7px 1px;letter-spacing:-.02em}.stage-buttons button span{display:none}.control-hint{font-size:12px;margin-top:7px}
 .lesson{grid-template-columns:1fr;gap:35px;padding-top:50px;padding-bottom:45px}.lesson h2{font-size:32px;margin-top:12px}.lesson-intro>p:not(.eyebrow){font-size:14px}.lesson-steps li{gap:18px;padding:16px 0}.lesson-steps h3{font-size:23px}.primary-link{font-size:12px;gap:15px;width:100%;max-width:340px}.project-footer{flex-direction:column;gap:12px;padding-top:25px;padding-bottom:25px;font-size:12px}.project-footer>a{align-self:start}
 .status-row{flex-direction:column;align-items:flex-start;gap:0}.render-status{font-size:12px;padding-bottom:0}.fallback-link{font-size:12px}
 body[data-renderer=fallback] .scene-wrap{height:clamp(280px,70vw,390px);max-height:none}
 .fallback-drawing{width:min(100%,clamp(332px,83vw,463px))}
}
@media(max-height:680px){
 .experience{height:auto}.stage{position:relative;height:auto;min-height:0;overflow:visible}.intro{padding-top:13px;padding-bottom:8px}h1{font-size:32px}.scene-layout{flex:none}.scene-wrap{height:clamp(260px,45vw,420px);min-height:250px;max-height:none;flex:auto}.controls{padding:9px 0}.scene-note h2{font-size:26px}.scene-note .note-caption,.note-rule{display:none}
}
@media(prefers-reduced-motion:reduce){
 *{scroll-behavior:auto!important;transition:none!important}
 .experience{height:auto}.stage{position:relative;height:auto;min-height:0;overflow:visible}.scene-layout{flex:none}.scene-wrap{height:clamp(260px,45vw,420px);min-height:250px;max-height:none;flex:auto}
}