:root{--paper:#fbfaf6;--ink:#263139;--muted:#586870;--line:#d6d8d4;--blue:#315d75;--rust:#9d5a3e;--note:#f5efda;--serif:Georgia,'Times New Roman',serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 'Segoe UI',Arial,sans-serif}button,a{font:inherit}button{cursor:pointer}a{color:var(--blue);text-underline-offset:3px}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #a86342;outline-offset:3px}.skip{position:absolute;top:-70px;left:16px;background:#fff;padding:9px 13px;z-index:20}.skip:focus{top:10px}
.masthead{max-width:1500px;margin:auto;min-height:68px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px;padding:12px max(4vw,30px);background:var(--paper)}.wordmark{color:var(--ink);font-size:.88rem;font-weight:750;letter-spacing:.025em;text-decoration:none;white-space:nowrap}.wordmark span{color:var(--rust);padding:0 4px}.masthead nav{display:flex;flex-wrap:wrap;gap:8px 18px}.masthead nav a{color:#405561;font-size:.86rem;text-decoration:none}.masthead nav a:hover{text-decoration:underline}
.intro{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(340px,.96fr);gap:clamp(26px,4vw,72px);align-items:center;max-width:1460px;margin:auto;padding:55px max(4vw,30px) 70px}.intro-copy{max-width:680px}.eyebrow{color:var(--rust);font-size:.78rem;font-weight:750;letter-spacing:.065em;text-transform:uppercase;margin:0 0 12px}.intro h1{font:400 clamp(3.15rem,5vw,5.2rem)/1.07 var(--serif);letter-spacing:-.035em;margin:0 0 23px}.intro h1 em{font-weight:400;font-style:normal;color:var(--blue)}.lead{font-size:1.11rem;line-height:1.68;margin:0 0 20px}.intro-question{border-left:4px solid var(--rust);padding:7px 0 7px 18px;margin:0 0 27px}.intro-question strong{display:block;font-size:.81rem;text-transform:uppercase;letter-spacing:.05em;color:var(--rust);margin-bottom:3px}.intro-question span{display:block;font:400 clamp(1.2rem,1.6vw,1.42rem)/1.45 var(--serif);color:var(--ink)}.start{display:inline-block;background:var(--blue);color:white;text-decoration:none;font-weight:700;padding:10px 18px;border-radius:3px}.start:hover{background:#23495f}.cover-photo{margin:0;background:#fff;border:1px solid var(--line);padding:10px;box-shadow:3px 4px 0 #e7e6df}.cover-photo img{display:block;width:100%;height:360px;object-fit:cover;background:#e0e3df}.cover-photo figcaption{font-size:.81rem;color:#5d6970;margin:9px 3px 2px;line-height:1.45}
.route-section,.quiz-section{max-width:1460px;margin:auto;padding:54px max(4vw,30px) 72px;border-top:1px solid var(--line)}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin:0 0 27px}.section-heading h2,.method h2,.sources h2{font:400 clamp(2.2rem,3.1vw,3.25rem)/1.16 var(--serif);letter-spacing:-.02em;margin:0}.section-heading>p{max-width:420px;color:var(--muted);margin:0}.route-layout{display:grid;grid-template-columns:minmax(0,1.22fr) minmax(290px,.78fr);gap:30px;align-items:start}.route-map{position:relative;aspect-ratio:7/5;min-height:320px;background:#edf2ee;border:1px solid #c7d2cf;overflow:hidden}.route-map:before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,transparent 96%,#315d750b 96%),linear-gradient(transparent 96%,#315d750b 96%);background-size:30px 30px;pointer-events:none}.route-map svg{display:block;width:100%;height:100%}.map-river{fill:none;stroke:#bfd3d7;stroke-width:24;opacity:.85;stroke-linecap:round}.map-road{fill:none;stroke:#e3dbbc;stroke-width:10;stroke-linecap:round;stroke-dasharray:2 2}.map-route{fill:none;stroke:var(--rust);stroke-width:5;stroke-linecap:round;stroke-dasharray:9 7}.map-city{fill:#788783;font-size:17px;font-family:Arial,sans-serif}.map-water{fill:#789eaa;font:italic 16px var(--serif);letter-spacing:3px}.map-note{position:absolute;top:13px;left:16px;background:#f9faf6e8;padding:4px 8px;z-index:2;color:#4c6268;font-size:.76rem}.map-pin{position:absolute;z-index:3;display:flex;align-items:center;gap:6px;transform:translate(-17px,-17px);text-decoration:none;color:var(--ink)}.map-pin b{display:grid;place-items:center;width:34px;height:34px;border:3px solid white;border-radius:50%;background:var(--blue);color:white;box-shadow:0 2px 5px #26313940;font-size:.9rem}.map-pin span{background:#fffefa;padding:2px 6px;font-size:.78rem;font-weight:700;box-shadow:0 1px 3px #26313920;white-space:nowrap}.map-pin:hover b,.map-pin:focus-visible b,.map-pin.is-active b{background:var(--rust);transform:scale(1.12)}.map-tooltip{position:absolute;left:16px;bottom:14px;right:16px;background:#fffcf5ed;border-left:3px solid var(--rust);padding:8px 12px;font-size:.83rem;color:#46565b}.route-stops{list-style:none;margin:0;padding:0;border-top:2px solid var(--blue)}.route-stops li{display:flex;gap:17px;padding:15px 0;border-bottom:1px solid var(--line)}.route-stops li.is-active h3{color:var(--rust)}.stop-no{font:400 1.5rem var(--serif);color:var(--rust);line-height:1.3}.route-stops h3{font:400 1.36rem var(--serif);margin:0 0 2px}.route-stops p{margin:0 0 5px;font-size:.9rem;line-height:1.52}.route-stops small{display:block;color:var(--muted);font-size:.76rem;margin-bottom:5px}.route-stops a{font-size:.82rem}.route-caveat{color:#69767b;font-size:.8rem;margin:16px 0 0}
.guide{border-top:1px solid var(--line);background:#f7f7f3;padding:64px max(4vw,30px) 76px}.guide>.section-heading,.stories{max-width:1260px;margin-left:auto;margin-right:auto}.stories{border-top:2px solid var(--blue)}.story{border-bottom:1px solid var(--line);background:transparent;scroll-margin-top:20px}.story summary{cursor:pointer;list-style:none;display:flex;gap:17px;align-items:center;padding:15px 5px}.story summary::-webkit-details-marker{display:none}.story summary:hover{background:#edf0ed}.story-number{font:400 1.46rem var(--serif);color:var(--rust);width:38px;flex:none}.story-summary{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;flex:1}.story-summary small{color:#647177;font-size:.77rem;min-width:170px}.story-summary strong{font:400 1.3rem var(--serif);color:var(--ink);min-width:225px}.story-summary em{font-style:normal;color:var(--muted);font-size:.84rem;flex:1;min-width:230px}.story-toggle{font:400 1.65rem var(--serif);color:var(--blue);margin-left:auto}.story[open] .story-toggle{transform:rotate(45deg)}.story-expanded{background:#fff;padding:20px clamp(18px,4vw,56px) 28px;margin:0 0 13px 50px;border-left:2px solid #cfdbd7}.story-expanded figure{margin:0 0 20px;max-width:700px}.story-expanded img{width:100%;max-height:350px;object-fit:cover;display:block}.story-expanded figcaption{font-size:.78rem;color:#68757b;margin-top:5px}.story-content{max-width:800px}.story-content p{margin:0 0 15px;line-height:1.68}.story-content .analysis{background:#f1f4f3;border-left:3px solid var(--blue);padding:12px 17px;margin-top:20px}.analysis strong{display:block;color:var(--blue)}.document{background:var(--note);padding:13px 17px;border-left:3px solid #bd914d;max-width:800px;margin:0 0 20px}.document b{font-size:.8rem;color:#775c2e}.document p{margin:3px 0 0;font:400 1.06rem/1.5 var(--serif)}.story-refs{font-size:.82rem;color:var(--muted);margin:18px 0 0}.story-refs a{margin-right:5px}
.quiz-section{max-width:1240px}.quiz-section .section-heading{margin-bottom:12px}.quiz-question{border:0;border-bottom:1px solid var(--line);padding:18px 0 20px;margin:0}.quiz-question legend{font:400 1.35rem var(--serif);padding:0;margin-bottom:6px}.quiz-question legend span{color:var(--rust);font:400 1rem 'Segoe UI',Arial,sans-serif;margin-right:14px}.quiz-question label{display:inline-flex;align-items:center;gap:7px;margin:6px 20px 5px 0;font-size:.92rem;cursor:pointer}.quiz-question input{accent-color:var(--blue)}.quiz-feedback{font-size:.88rem;padding:8px 12px;margin:9px 0 0;background:#f1f4f3}.quiz-feedback.incorrect{background:#f7efe6}.check-button{border:0;border-radius:3px;background:var(--blue);color:#fff;padding:9px 17px;margin-top:22px;font-weight:700}.check-button:hover{background:#23495f}.quiz-result{font-size:.91rem;color:var(--blue);font-weight:700;min-height:1.5em}
.method{display:grid;grid-template-columns:minmax(200px,.7fr) minmax(0,1.3fr);gap:50px;padding:70px max(4vw,30px);max-width:1460px;margin:auto;border-top:1px solid var(--line)}.method-body{max-width:780px;font-family:var(--serif)}.method-body p{font-size:1.14rem;line-height:1.62;margin:0 0 17px}.method-body .method-note{font-size:.94rem;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}.sources{border-top:1px solid var(--line);background:#f2f4f2;padding:60px max(4vw,30px) 70px}.sources>p:not(.eyebrow),.sources h2,.source-details{max-width:1140px}.sources>p:not(.eyebrow){line-height:1.65}.source-details{border-top:1px solid var(--line);padding:9px 0;margin-top:18px}.source-details summary{cursor:pointer;color:var(--blue);font-weight:700}.bibliography{columns:2;column-gap:36px;margin:14px 0;padding-left:26px}.bibliography li{break-inside:avoid;padding:0 10px 9px 0;font-size:.88rem}.sources .small{font-size:.81rem;color:#647177;margin-top:20px}footer{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;background:#e5ebe8;border-top:1px solid var(--line);padding:24px max(4vw,30px);font-size:.83rem;color:#485d65}footer span:first-child{font-weight:700;color:var(--ink)}footer a{text-decoration:none}
@media(max-width:1040px){.intro{grid-template-columns:1fr 1fr;gap:25px}.intro h1{font-size:3.7rem}.route-layout{grid-template-columns:1fr}.route-map{max-width:750px}.route-stops{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;border-top:0}.route-stops li{border-top:2px solid var(--blue)}}
@media(max-width:720px){.masthead{padding:13px 20px;align-items:flex-start;flex-direction:column;gap:6px}.masthead nav{gap:3px 13px}.masthead nav a{font-size:.77rem}.intro{display:block;padding:38px 20px 48px}.intro h1{font-size:3.25rem}.lead{font-size:1.03rem}.cover-photo{margin-top:30px}.cover-photo img{height:245px}.route-section,.guide,.quiz-section,.sources{padding:45px 20px 55px}.section-heading{display:block}.section-heading>p{margin-top:10px}.route-layout{gap:18px}.route-map{min-height:0}.map-pin span{display:none}.map-pin b{width:29px;height:29px}.map-tooltip{font-size:.72rem;bottom:6px;left:8px;right:8px;padding:5px 8px}.map-note{font-size:.65rem;top:5px;left:6px}.route-stops{display:block}.route-stops li{border-top:0;padding:12px 0}.route-stops li:first-child{border-top:2px solid var(--blue)}.story summary{align-items:flex-start;gap:9px;padding:12px 2px}.story-number{width:30px;font-size:1.25rem}.story-summary{display:block}.story-summary small,.story-summary strong,.story-summary em{display:block;min-width:0}.story-summary strong{font-size:1.19rem}.story-summary em{font-size:.79rem;line-height:1.35;margin-top:2px}.story-toggle{font-size:1.4rem}.story-expanded{margin-left:0;padding:17px}.quiz-question label{display:flex;margin:5px 0}.method{display:block;padding:50px 20px}.method-body{margin-top:20px}.bibliography{columns:1}footer{padding:24px 20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.map-stage{position:absolute;inset:0;transform-origin:center;transition:transform .2s ease;z-index:1}.map-controls{position:absolute;top:12px;right:12px;display:flex;gap:4px;z-index:4}.map-controls button{width:30px;height:30px;border:1px solid #bdc9c8;background:#fffefa;color:var(--blue);font-size:1.3rem;line-height:1}.map-controls button:disabled{opacity:.45;cursor:default}.map-tooltip{z-index:3}
.feedback{background:#e9efeb;border-top:1px solid var(--line)}.feedback-inner{max-width:1460px;margin:auto;padding:42px max(4vw,30px);display:flex;justify-content:space-between;align-items:center;gap:38px}.feedback h2{font:400 clamp(2rem,2.8vw,2.75rem)/1.18 var(--serif);letter-spacing:-.02em;margin:0 0 10px}.feedback p:not(.eyebrow){max-width:710px;margin:0;color:#46575c}.feedback-link{display:block;flex:none;min-width:265px;border:1px solid var(--blue);border-radius:3px;padding:11px 17px;background:var(--blue);color:white;text-decoration:none;font-weight:700;line-height:1.35}.feedback-link:hover{background:#23495f}.feedback-link span{float:right}.feedback-link small{display:block;font-weight:400;font-size:.81rem;opacity:.9;margin-top:3px;overflow-wrap:anywhere}@media(max-width:720px){.feedback-inner{display:block;padding:38px 20px 42px}.feedback-link{display:block;min-width:0;margin-top:24px;max-width:340px}}
.image-credit{font-size:.72rem;color:#69767b}.image-credit a{color:inherit}