:root{--paper:#f8f6ef;--ink:#253b32;--muted:#55665a;--line:#cbd2c4;--green:#2e6f56;--amber:#8a5a2b;--bad:#884e43;--wash:#edf0e5}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,system-ui,sans-serif;line-height:1.62}a{color:inherit;text-underline-offset:.2em}a:focus-visible,button:focus-visible,.diagram-scroll:focus-visible{outline:3px solid var(--amber);outline-offset:4px}.skip{position:absolute;top:-5rem;left:1rem;z-index:5;padding:.6rem 1rem;background:var(--ink);color:white}.skip:focus{top:1rem}.site-head{max-width:1180px;margin:auto;padding:22px 26px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-bottom:1px solid var(--line)}.site-head>a{font-weight:700;text-decoration:none}.site-head nav{display:flex;gap:20px;flex-wrap:wrap;font-size:.84rem}.site-head nav a{text-decoration:none}main{max-width:1180px;margin:auto;padding:0 26px}h1,h2,h3,p{margin-top:0}h1,h2{font-family:Georgia,serif;font-weight:400;letter-spacing:-.035em}h1{font-size:clamp(3rem,7vw,5.6rem);line-height:1.03;margin:0 0 25px}h2{font-size:clamp(1.9rem,3.2vw,2.8rem);line-height:1.15}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.72rem;font-weight:750;color:#536f5f}.hero{max-width:840px;padding:clamp(54px,7vw,88px) 0 46px}.lead{font-size:clamp(1.16rem,1.8vw,1.38rem);line-height:1.55;max-width:710px}.scenario{color:var(--muted);max-width:700px}.bridge{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;padding:25px 0 48px;border-top:1px solid var(--line)}.bridge div{border-left:3px solid #a9baa4;padding-left:17px}.bridge b{font-size:.76rem;text-transform:uppercase;letter-spacing:.1em}.bridge p{color:var(--muted);margin:.45rem 0 0;font-size:.92rem}.trial,.meaning,.sources{padding:36px 0 52px;border-top:1px solid var(--line)}.trial>p:not(.eyebrow){max-width:780px;color:var(--muted)}.choice{display:flex;gap:9px;flex-wrap:wrap;margin:22px 0}.choice button{font:inherit;cursor:pointer;color:var(--ink);background:#fdfcf7;border:1px solid #aabca7;border-radius:4px;padding:.75rem 1rem}.choice button[aria-pressed="true"]{color:white;background:var(--ink);border-color:var(--ink)}.diagrams{display:grid;gap:20px}.diagram-card{border:1px solid var(--line);background:#fdfcf7;border-radius:5px;padding:20px;transition:border-color .2s,box-shadow .2s}.diagram-card.active{border-color:var(--green);box-shadow:0 0 0 2px #cfe1d4}.card-title{display:flex;align-items:baseline;gap:14px}.card-title span{font-family:Georgia,serif;color:var(--amber);font-size:1.5rem}.card-title h3{margin-bottom:14px;font-size:1.05rem}.diagram-scroll{overflow-x:auto}.diagram-scroll svg{display:block;min-width:720px;width:100%;height:auto}.boundary{fill:#fbfaf5;stroke:#b5c3b0;stroke-dasharray:6 5}.boundary-label{font-size:11px;font-weight:700;letter-spacing:1px;fill:#62776b}.wire{stroke:#537568;stroke-width:2.5;fill:none}.box{fill:#edf2e8;stroke:#789988;stroke-width:1.4}.box.copy{fill:#dce9dc;stroke:#57806c}.box.update{fill:#f3e5d1;stroke:#a2743c}.box.join.bad{fill:#f5e3dd;stroke:#a3675e}.box.join.good{fill:#dcebdc;stroke:#57866b}.box-label{fill:#203b31;font-size:15px;font-weight:700}.box-sub{fill:#4f6658;font-size:12px}.port,.value{fill:#294c3e;font-size:14px;font-weight:650}.result{font-size:.92rem;margin:14px 0 1px}.result.bad{color:#794a40}.result.good{color:#246548}.live{border-left:4px solid var(--green);padding:13px 19px;background:var(--wash);margin-top:25px;max-width:780px}.live p:last-child{margin-bottom:0}.meaning>p{max-width:840px}.math{max-width:790px;overflow-x:auto;white-space:pre;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.86rem;line-height:1.8;background:#e9eddf;border:1px solid #c8d1c0;border-radius:4px;padding:17px 19px;margin:23px 0}.source-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:25px}.source-grid article{border-top:2px solid #91a992;padding-top:17px}.source-grid h3{font-size:1rem}.source-grid p{font-size:.91rem;color:var(--muted)}footer{padding:26px 0 45px;border-top:1px solid var(--line);display:flex;gap:12px 28px;flex-wrap:wrap;justify-content:space-between;font-size:.83rem;color:var(--muted)}footer p{flex-basis:100%;margin:0}@media(max-width:760px){.bridge,.source-grid{grid-template-columns:1fr}.bridge{gap:18px}.hero{padding-top:50px}.trial,.meaning,.sources{padding-top:30px;padding-bottom:38px}.diagram-card{padding:14px}.site-head nav{gap:12px}}
:root .diagrams{grid-template-columns:minmax(0,1fr)}
:root .diagram-card{min-width:0}
.scroll-hint{display:none;font-size:.78rem;color:var(--muted);margin:0 0 6px}@media(max-width:760px){.scroll-hint{display:block}}
.check-excerpt{margin-top:24px;max-width:790px;border:1px solid var(--line);border-radius:4px;background:#fdfcf7;padding:15px 19px}.check-excerpt summary{cursor:pointer;font-weight:700}.check-excerpt pre{overflow-x:auto;margin:18px 0;background:#e9eddf;padding:15px;line-height:1.6}.check-excerpt p{margin-bottom:0;color:var(--muted);font-size:.91rem}
.formal-renderings{margin:30px 0 27px}.formal-renderings h3{font-family:Georgia,serif;font-size:1.35rem;font-weight:400;margin-bottom:8px}.formal-renderings>p{max-width:790px;color:var(--muted);font-size:.93rem}.render-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px;margin:19px 0}.render-pair figure{min-width:0;margin:0;padding:12px;border:1px solid var(--line);border-radius:4px;background:white}.render-frame{overflow-x:auto}.render-frame img{display:block;width:100%;min-width:520px;height:auto}.render-pair figcaption{font-size:.84rem;color:var(--muted);margin:10px 3px 0}.formal-renderings .render-limit{border-left:3px solid #a9baa4;padding-left:14px;margin-top:21px}@media(max-width:760px){.render-pair{grid-template-columns:1fr}.render-pair figure{padding:9px}}
