*{box-sizing:border-box}html{color-scheme:light;scroll-behavior:smooth}body{margin:0;background:#faf6ee;color:#0b3b2e;font:17px/1.65 system-ui,-apple-system,sans-serif}button,input,select{font:inherit}a{color:inherit;text-underline-offset:4px}button,a,input,select,summary{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #248b7d;outline-offset:5px}header,footer{max-width:1240px;margin:auto;padding:24px 32px;display:flex;align-items:center;justify-content:space-between;gap:28px}header{border-bottom:1px solid #0b3b2e20}header nav{display:flex;gap:28px;font-size:15px}header a{text-decoration:none}.skip{position:absolute;top:-100px}.skip:focus{top:6px;left:6px;background:white;z-index:5}main{max-width:1160px;padding:54px 32px 70px;margin:auto}.eyebrow{font-size:12px;font-weight:700;letter-spacing:.14em;margin:0 0 18px}h1{font-size:clamp(44px,6vw,76px);line-height:1.04;letter-spacing:-.055em;font-weight:650;margin:0 0 24px}h2{font-size:clamp(30px,3.8vw,44px);line-height:1.13;letter-spacing:-.04em;font-weight:600;margin:0 0 22px}h3{font-size:23px;margin:0 0 12px}.lead{font-size:24px;line-height:1.5;max-width:35ch;margin:0 0 24px}.scope{display:flex;gap:10px;flex-wrap:wrap}.scope span{padding:7px 13px;border:1px solid #0b3b2e25;border-radius:30px;font-size:13px}.fence,.note{font-size:13px;line-height:1.6;color:#465d52}.review-status{background:#efe9dc;border:1px solid #cfc7b5;border-radius:16px;padding:20px 24px;margin:28px 0}.review-status p{font-size:15px;margin:8px 0}.review-status a{font-size:14px;font-weight:650}.concept{margin:30px 0;background:#eee5d3;border:1px solid #d5cdbd;border-radius:24px;overflow:hidden}.concept video{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}.film-actions{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:15px 20px}.film-actions figcaption{font-size:13px}.film-actions button{background:#0b3b2e;color:#fff;border:0;border-radius:30px;padding:10px 22px;min-height:44px}.concept [role=status]{display:block;font-size:13px;padding:0 20px}.concept [role=status]:not(:empty){padding-bottom:16px}.hero-loop{margin-bottom:64px}.lesson-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px}.chapter-guide{align-self:start;position:sticky;top:24px}.chapter-guide button{display:flex;gap:14px;width:100%;text-align:left;background:transparent;color:#34584c;border:1px solid transparent;border-radius:12px;margin:6px 0;padding:12px;min-height:48px;font-size:13px}.chapter-guide button span{font-size:15px}.chapter-guide button[aria-current]{background:#0b3b2e;color:white}.zone-grid,.comparison{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:26px 0}.zone-grid article,.comparison article{background:#f1f2e8;border:1px solid #d6decf;border-radius:20px;padding:24px}.zone-grid p,.comparison p{font-size:14px;line-height:1.6;margin:10px 0}.zone-letter{font-size:28px;font-weight:600;display:inline-flex;width:52px;height:52px;border-radius:14px;background:#d5e5d8;align-items:center;justify-content:center}.zone-grid article:nth-child(3){background:#e4efe5}.chapter-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid #0b3b2e20;margin-top:34px;padding-top:24px;font-size:13px}.chapter-actions button{border:1px solid #adbcae;border-radius:26px;padding:11px 18px;background:transparent;color:inherit;min-height:44px}.chapter-actions button:disabled{opacity:.45}.why,.glossary{margin-top:80px;padding-top:46px;border-top:1px solid #0b3b2e30}.why p{max-width:70ch}dl{display:grid;grid-template-columns:220px 1fr;gap:18px 28px}dt{font-weight:650}dd{margin:0;color:#385749}summary{cursor:pointer;min-height:48px;padding:16px 0;font-weight:600}fieldset{border:1px solid #b6c5b6;border-radius:16px;padding:20px;display:grid;grid-template-columns:1fr 1fr;gap:18px}fieldset label{font-size:14px}fieldset select,fieldset input{display:block;width:100%;margin-top:8px;min-height:44px;border:1px solid #bcc6b7;border-radius:7px;padding:5px;background:#fffaf2}fieldset button{grid-column:1/-1;border:1px solid #bec6b8;padding:12px;border-radius:24px}fieldset:disabled{opacity:.65}.lesson-next{padding:36px;margin-top:64px;border-radius:24px;background:#dcece0}.lesson-next span{display:block;font-size:11px;letter-spacing:.15em;margin-bottom:14px}.lesson-next a{font-size:30px;line-height:1.3;font-weight:600;letter-spacing:-.03em}.lesson-next p{font-size:15px;margin-bottom:0}footer{flex-wrap:wrap;border-top:1px solid #0b3b2e20;font-size:13px}footer p{max-width:58ch}[hidden]{display:none!important}
@media(max-width:760px){main{padding:36px 20px 50px}header,footer{padding:18px 20px;flex-wrap:wrap}header nav{gap:24px}header nav a{min-height:44px;display:inline-flex;align-items:center}.lead{font-size:20px}.lesson-layout{grid-template-columns:1fr;gap:28px}.chapter-guide{position:static;display:grid;grid-template-columns:1fr 1fr;gap:4px}.chapter-guide .eyebrow{grid-column:1/-1;margin-bottom:8px}.chapter-guide button{margin:0;gap:8px;padding:10px}.chapter-guide button span{font-size:13px}.concept{border-radius:16px}.film-actions{padding:12px;gap:12px}.film-actions figcaption{font-size:11px}.film-actions button{padding:8px 16px}.zone-grid,.comparison{gap:10px}.zone-grid article,.comparison article{padding:17px}.zone-grid p{font-size:12px}.comparison{grid-template-columns:1fr}dl{grid-template-columns:1fr;gap:8px}dd{margin-bottom:16px}.review-status{padding:18px}.hero-loop{margin-bottom:40px}.lesson-next{padding:24px}.lesson-next a{font-size:25px}fieldset{grid-template-columns:1fr}.chapter-actions{justify-content:flex-start}.why,.glossary{margin-top:50px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* Counted lesson interface; concept motion never drives these elements. */
.r1-hero{display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center;margin-bottom:34px}.r1-hero h1{font-size:clamp(38px,4.5vw,62px)}.r1-hero .lead{font-size:21px}.kicker{font-size:13px;color:#52675b;max-width:48ch}.r1-hero .concept{margin:0}.primary{background:#0b3b2e;color:#fff;border:1px solid #0b3b2e;border-radius:30px;padding:12px 22px;min-height:48px;font-weight:650}.study-status{background:#e4eee5;border:1px solid #c7d9cc;padding:16px 22px;border-radius:16px;font-size:14px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:38px 0 20px}.section-heading h2{font-size:34px;margin:0}.section-heading p{font-size:14px;max-width:32ch}.outcome-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.outcome{border:1px solid #d4dbcf;border-radius:24px;background:#fffdf8;padding:24px}.outcome.forecast{background:#eff5ec}.served{font-size:16px;margin:0 0 20px}.served strong{font-size:42px;font-weight:650}.metric-bar p{display:flex;justify-content:space-between;font-size:15px;margin:16px 0 8px}.bar-track{height:12px;background:#dce2d7;border-radius:8px;overflow:hidden}.bar-track span{height:100%;display:block;background:#b58b54;border-radius:8px}.forecast .bar-track span{background:#2a8e7f}.playback{display:flex;gap:16px;align-items:flex-end;flex-wrap:wrap;padding:18px;background:#f0ede2;border-radius:16px;margin:28px 0}.playback label,.section-heading label,.move-form label{display:flex;flex-direction:column;font-size:13px;gap:6px}.playback select,.section-heading select,.move-form select,.move-form input{background:#fffdf7;border:1px solid #c7d4c7;border-radius:8px;min-height:44px;padding:8px;max-width:100%}.playback button,.manual-actions button:not(.primary),.move-form button{min-height:44px;border:1px solid #b7cdbf;border-radius:22px;padding:8px 16px;background:#fffdf8;color:#0b3b2e}.clock{flex:1;min-width:140px}.clock input{min-height:40px;accent-color:#176b58;width:100%}.playback strong{min-height:44px;display:flex;align-items:center;font-size:15px}.map-bench{background:#f2f1e7;border:1px solid #cfd8c9;border-radius:22px;padding:24px}.bench-heading{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;margin-bottom:20px;font-size:14px}.bench-heading span{color:#59705d}.zone-grid{margin:0;gap:14px}.zone-grid .zone{background:#fffdf7;min-height:185px;border:1px solid #cddac9;border-radius:16px;padding:18px}.zone-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.zone-letter{font-size:24px;font-weight:700}.zone-heading strong{font-size:27px}.zone-grid .zone-demand{font-size:14px;margin:10px 0 3px;line-height:1.5}.zone-grid .zone-state{font-size:12px;margin:0 0 12px;color:#5f6b5d}.vehicle-dots{display:flex;gap:7px;flex-wrap:wrap}.vehicle-dot{min-width:42px;min-height:42px;padding:6px;border:1px solid #9fbdb0;border-radius:14px;background:#dceee2;color:#0b3b2e;font-size:12px;font-weight:700}.vehicle-dot.cod{background:#f1dfbd;border-color:#c0a575}.vehicle-dot.selected{outline:2px solid #0b3b2e;outline-offset:2px}.transit{margin-top:20px;border-top:1px dashed #b7c9b6;padding-top:16px}.transit>strong{font-size:14px;display:block;margin-bottom:12px}.transit-item{display:flex;align-items:center;gap:5px;margin-right:6px}.transit-item small{font-size:12px}.state-legend{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:12px;line-height:1.6}.inspector{padding:0 0 20px}.inspector .section-heading{margin-top:28px}.vehicle-state{padding:18px;background:#edf3e9;border-radius:14px;font-size:16px}.table-scroll{overflow-x:auto;max-width:100%;margin:16px 0}table{border-collapse:collapse;width:100%;font-size:13px;text-align:left;white-space:nowrap}th,td{padding:11px 12px;border-bottom:1px solid #d9dfd1}thead{background:#eef0e6}th{font-weight:650}td code{font-size:11px}.ledger-table{max-height:430px}#vehicle-events{max-height:320px}.identity{overflow-wrap:anywhere;font-size:12px}.identity code{font-size:11px}.verdict{border-left:4px solid #2a9d8f;background:#eaf2e5;padding:20px;font-size:17px}.manual-panel{background:#ecf3e7;border:1px solid #b5cbb5;border-radius:20px;padding:24px;margin:24px 0}.move-form{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}.move-form button{grid-column:1/-1}.manual-actions{display:flex;gap:10px;flex-wrap:wrap}#pending-moves{padding-left:20px;font-size:14px}#pending-moves li{margin-bottom:10px}#pending-moves button{border:0;text-decoration:underline;background:transparent;font-size:12px;min-height:40px}#pending-note,#manual-status{font-size:14px}#manual-totals{margin-top:18px;font-size:15px;font-weight:650}.action-error{background:#f8e7df;color:#762d1f;padding:16px;border:1px solid #dcb9a7;border-radius:12px}.assumptions{margin-top:40px;padding:24px;background:#f0eddf;border-radius:20px}.assumptions p{font-size:15px}details>summary{cursor:pointer;min-height:44px;padding-block:10px;font-weight:600}#verdict-film{margin-top:30px}.lesson-layout{margin-top:60px;grid-template-columns:190px minmax(0,1fr);gap:32px}.chapter-guide{top:20px}.chapter-actions{gap:12px}.chapter-actions button{min-height:44px}.chapter-actions span{font-size:13px}.chapter-guide button{min-height:48px}
@media(max-width:900px){.r1-hero{grid-template-columns:1fr;gap:24px}.r1-hero .concept{max-width:660px}.r1-hero .concept video{max-height:320px;object-fit:cover}.lesson-layout{grid-template-columns:1fr}.chapter-guide{position:static;display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.chapter-guide .eyebrow{grid-column:1/-1}.chapter-guide button{margin:0;padding:12px}.chapter-guide button span{font-size:13px}}
@media(max-width:600px){.outcome-grid{grid-template-columns:1fr}.section-heading{display:block}.section-heading p{max-width:none}.section-heading h2{font-size:29px}.section-heading label{margin-top:12px}.map-bench{padding:16px}.zone-grid{gap:8px}.zone-grid .zone{padding:12px}.zone-heading{gap:6px}.zone-heading strong{font-size:21px}.zone-letter{font-size:20px}.vehicle-dot{min-width:42px;min-height:44px}.zone-grid .zone-demand{font-size:13px}.bench-heading{font-size:13px}.chapter-guide{grid-template-columns:1fr 1fr}.manual-panel{padding:16px}.move-form{grid-template-columns:1fr 1fr}.move-form label:last-of-type{grid-column:1/-1}.manual-actions button{width:100%}.playback{padding:14px;gap:12px}.clock{flex-basis:100%}.r1-hero .lead{font-size:19px}.outcome{padding:20px}}
/* Grid children must shrink around scrollable evidence tables on phones. */
.lesson-layout>*{min-width:0}.zone-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.zone-heading{flex-wrap:wrap}.vehicle-dot{min-height:44px;min-width:44px}
@media(max-width:380px){.zone-grid{grid-template-columns:minmax(0,1fr)}.film-actions{gap:10px;padding:12px}.film-actions button{padding:8px 16px}}
#paired-waits{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,1fr);gap:24px;align-items:start}.zone-wait-table{overflow:auto}.zone-wait-table table{min-width:0;white-space:normal}.zone-wait-table th,.zone-wait-table td{padding:10px 8px}.zone-wait-bars{display:grid;grid-template-columns:1fr 1fr;gap:16px}.zone-wait-bars h4{margin:0 0 8px}.wait-bar{display:grid;grid-template-columns:1fr;gap:2px;margin:8px 0;font-size:13px}.wait-bar meter{width:100%;height:12px;accent-color:#b58b54}.wait-bar.forecast meter{accent-color:#2a8e7f}.wait-bar meter::-webkit-meter-optimum-value{background:#b58b54}.wait-bar.forecast meter::-webkit-meter-optimum-value{background:#2a8e7f}.wait-bar meter::-moz-meter-bar{background:#b58b54}.wait-bar.forecast meter::-moz-meter-bar{background:#2a8e7f}.wait-bar strong{font-variant-numeric:tabular-nums}@media(max-width:1100px){#paired-waits{grid-template-columns:1fr}.zone-wait-bars{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:600px){.zone-wait-bars{grid-template-columns:1fr 1fr}}

/* Methodology explainers. */
.methodology-explainer{grid-column:1/-1;min-width:0;margin:22px 0;padding:24px;border:1px solid #ccdcd4;border-radius:20px;background:#f4f7ef;color:#173d34;text-align:left;overflow:hidden}.methodology-explainer h3{margin:4px 0 16px;font-size:24px;line-height:1.2}.explainer-kicker{margin:0;color:#47685d;font:600 12px/1.5 system-ui,sans-serif;letter-spacing:.08em;text-transform:uppercase}.explainer-stage{display:block;width:100%;max-width:600px;height:auto;margin:12px auto;background:#fffdf6;border-radius:14px}.explainer-stage text{fill:#173d34;font-family:system-ui,sans-serif}.explainer-track{fill:#dce9df}.explainer-fill{fill:#25816e}.explainer-label{font-size:24px;font-weight:600}.explainer-small{font-size:24px}.explainer-value{font-size:30px;font-weight:700;font-variant-numeric:tabular-nums}.explainer-warning{fill:#b48225}.explainer-danger{fill:#b5473e}.explainer-hold{fill:#f5dfd4}.explainer-caption{margin:14px 0 8px;font-size:19px;font-weight:650;line-height:1.4}.explainer-equivalent{max-width:78ch;margin:0;font-size:16px;line-height:1.6}.explainer-controls{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:18px}.explainer-controls button{min-height:44px;padding:9px 18px;border:1px solid #8ba99a;border-radius:100px;background:#fffdf6;color:#173d34;font:600 15px/1.3 system-ui,sans-serif;cursor:pointer}.explainer-controls button:disabled{opacity:.55;cursor:default}.explainer-controls button:focus-visible{outline:3px solid #24816d;outline-offset:3px}.explainer-status{margin:0;color:#47685d;font-size:14px;line-height:1.4}@media(max-width:600px){.methodology-explainer{padding:16px;margin:18px 0}.methodology-explainer h3{font-size:22px}.explainer-caption{font-size:18px}}
.explainer-connector{stroke:#80a697;stroke-width:3}.explainer-limit{stroke:#b5473e;stroke-width:3}.explainer-block{fill:#e7eee3;stroke:#91ac9d;stroke-width:3}.explainer-empty,.explainer-car{fill:#fffdf6;stroke:#25816e;stroke-width:3}[data-empty="false"] .explainer-car{fill:#25816e}.explainer-wheel{fill:#173d34}.explainer-stage .explainer-verdict{fill:#fffdf6;font-size:28px;font-weight:750}
.explainer-wash{fill:#f5dfd4}
/* End methodology explainers. */