/* Contour & Grid — a USGS-style topographic quadrangle: brown contour lines drawn one by one round a summit, a blue stream, black UTM grid ticks in the collar and a crosshair settling on a fix; Fira Sans Condensed for headings and coordinates, like map lettering. */
:root,[data-theme="map-tools"]{
--color-primary:#773300;--color-accent:#2f78b4;--color-bg:#eef1e6;--color-bg-alt:#e3e8d8;
--color-text:#1f1d1a;--color-text-muted:#57564c;--color-border:#cdd2c0;
--card:#fbfaf5;--contour:#773300;--contour-soft:#b07a4f;--water:#2f78b4;--wood:#d5e6c6;--ink:#1f1d1a;--sheet:#fbfaf3;
--radius-sm:2px;--radius-md:6px;
--font-display:"Fira Sans Condensed","Arial Narrow","Roboto Condensed","Helvetica Neue",Arial,sans-serif;
--font-base:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
--font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
--grid:linear-gradient(#1f1d1a14 1px,transparent 1px),linear-gradient(90deg,#1f1d1a14 1px,transparent 1px)}
*{box-sizing:border-box}
body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-base);-webkit-font-smoothing:antialiased}
a{color:var(--contour)}
:focus-visible{outline:3px solid var(--water);outline-offset:3px}
/* nav */
.site-nav{background:var(--card);border-bottom:1px solid var(--color-border)}
.nav-container{position:relative;height:60px;max-width:1160px;margin:auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center}
.nav-brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.nav-logo{height:34px}
.nav-site-name{font:600 22px/1 var(--font-display);color:var(--ink);letter-spacing:.01em}
.nav-links,.footer-links{display:flex;gap:22px;flex-wrap:wrap}
.nav-links a,.footer-links a{text-decoration:none;color:var(--color-text-muted);font:600 15px var(--font-base)}
.nav-links a:hover,.footer-links a:hover{color:var(--contour);text-decoration:underline;text-decoration-thickness:2px}
/* home */
.cg-home{max-width:1160px;margin:auto;padding:0 20px 90px}
.cg-hero{display:grid;grid-template-columns:minmax(0,1fr) 420px;gap:48px;align-items:center;margin:40px 0 44px;padding-bottom:40px;border-bottom:1px solid var(--color-border)}
.cg-copy small{font:600 14px var(--font-display);letter-spacing:.16em;text-transform:uppercase;color:var(--contour)}
.cg-copy h1{font:600 clamp(38px,5.2vw,66px)/1 var(--font-display);margin:12px 0 18px;color:var(--ink);letter-spacing:-.01em}
.cg-copy h1 em{font-style:normal;color:var(--contour);text-decoration:underline;text-decoration-color:var(--contour-soft);text-decoration-thickness:3px;text-underline-offset:8px}
.cg-copy p{font-size:17px;line-height:1.7;color:var(--color-text-muted);max-width:54ch;margin:0}
.cg-sheet{position:relative;padding:22px 26px 34px;background:var(--sheet);border:1px solid var(--color-border);box-shadow:0 18px 34px #3a2a1426}
.cg-sheet svg{display:block;width:100%;height:auto;background:var(--wood);outline:1.5px solid var(--ink)}
.cg-sheet .cg-c{fill:none;stroke:var(--contour-soft);stroke-width:1.1;stroke-dasharray:1400;stroke-dashoffset:1400;animation:cg-draw 1.6s ease-out forwards}
.cg-sheet .cg-c.is-index{stroke:var(--contour);stroke-width:2.2}
.cg-sheet .cg-c:nth-of-type(1){animation-delay:1.1s}.cg-sheet .cg-c:nth-of-type(2){animation-delay:.9s}.cg-sheet .cg-c:nth-of-type(3){animation-delay:.7s}.cg-sheet .cg-c:nth-of-type(4){animation-delay:.5s}.cg-sheet .cg-c:nth-of-type(5){animation-delay:.3s}.cg-sheet .cg-c:nth-of-type(6){animation-delay:.1s}
@keyframes cg-draw{to{stroke-dashoffset:0}}
.cg-sheet .cg-stream{fill:none;stroke:var(--water);stroke-width:2;stroke-linecap:round}
.cg-sheet .cg-gl{stroke:var(--ink);stroke-width:.6;opacity:.45}
.cg-sheet .cg-lbl{font:600 11px var(--font-display);fill:var(--contour)}
.cg-sheet .cg-x{opacity:0;transform-box:fill-box;transform-origin:center;animation:cg-fix .7s cubic-bezier(.2,.7,.3,1.2) 2.5s forwards}
.cg-sheet .cg-x circle{fill:none;stroke:#c8102e;stroke-width:2}
.cg-sheet .cg-x path{stroke:#c8102e;stroke-width:2}
@keyframes cg-fix{from{opacity:0;transform:scale(2.4)}to{opacity:1;transform:scale(1)}}
.cg-collar{position:absolute;left:26px;right:26px;bottom:9px;display:flex;justify-content:space-between;font:600 11px var(--font-display);letter-spacing:.12em;color:var(--color-text-muted)}
.cg-tick{position:absolute;font:600 11px var(--font-display);color:var(--ink)}
.cg-rail{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-bottom:10px;font:600 21px var(--font-display);color:var(--color-text-muted)}
.cg-rail b{color:var(--ink);font-weight:600}
.cg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:14px}
.cg-card{position:relative;display:flex;flex-direction:column;padding:24px 24px 20px;background:var(--card);background-image:var(--grid);background-size:24px 24px;border:1px solid var(--color-border);border-radius:var(--radius-md);text-decoration:none;color:inherit;transition:transform .16s,box-shadow .16s}
.cg-card::before,.cg-card::after{content:"";position:absolute;width:14px;height:14px;border:0 solid var(--ink)}
.cg-card::before{top:8px;left:8px;border-top-width:2px;border-left-width:2px}
.cg-card::after{bottom:8px;right:8px;border-bottom-width:2px;border-right-width:2px}
.cg-card:hover{transform:translateY(-3px);box-shadow:0 14px 28px #3a2a141f}
.cg-sym{align-self:flex-start;font:600 18px var(--font-display);color:var(--contour);background:var(--sheet);padding:0 4px}
.cg-card h2{font:600 23px/1.12 var(--font-display);margin:10px 0 8px;color:var(--ink)}
.cg-card p{margin:0 0 16px;font-size:14px;line-height:1.65;color:var(--color-text-muted);flex:1}
.cg-open{font:700 14px var(--font-base);color:var(--contour)}
.cg-note{margin-top:34px;padding:16px 18px;border-left:6px solid var(--contour);border-radius:var(--radius-sm);background:var(--card);font-size:14px;line-height:1.7;color:var(--color-text-muted)}
/* detail */
.cgd-page{max-width:1080px;margin:auto;padding:24px 20px 90px}
.cgd-crumb{font-size:13px;color:var(--color-text-muted)}
.cgd-crumb a{text-decoration:none;font-weight:700}
.cgd-head{max-width:800px;padding:30px 0 24px}
.cgd-kicker{display:inline-block;font:600 13px var(--font-display);letter-spacing:.18em;color:var(--contour)}
.cgd-head h1{font:600 clamp(34px,4.8vw,56px)/1.04 var(--font-display);margin:12px 0 14px;color:var(--ink)}
.cgd-head p{font-size:18px;line-height:1.7;color:var(--color-text-muted);margin:0}
.cgd-tool{background:var(--card);border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;margin:14px 0 50px;box-shadow:0 16px 34px #3a2a141a}
.cgd-tool-label{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:12px 24px;background:var(--contour);color:var(--sheet);font:600 20px var(--font-display)}
.cgd-tool-label i{flex:0 0 72px;height:18px;border:1.5px solid #fbfaf3aa;background:linear-gradient(90deg,#fbfaf3aa 1px,transparent 1px) 0 0/12px 100%}
.cgd-tool-body{padding:28px}
.cgd-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:56px}
.cgd-reading{font-size:17px;line-height:1.8}
.cgd-reading h2{font:600 29px/1.12 var(--font-display);margin:36px 0 12px;color:var(--ink)}
.cgd-reading p{margin:0 0 14px}
.cgd-reading ol,.cgd-reading ul{margin:0 0 16px;padding-left:22px}
.cgd-reading ol{list-style:decimal}.cgd-reading ul{list-style:disc}
.cgd-reading li{margin-bottom:7px}
.cgd-side{position:relative;align-self:start;background:var(--card);background-image:var(--grid);background-size:20px 20px;border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;color:var(--color-text-muted);font-size:14px;line-height:1.65}
.cgd-side strong{display:block;color:var(--ink);font:600 20px var(--font-display);margin-bottom:6px}
.cgd-side a{display:inline-block;margin-top:12px;font-weight:700;text-decoration:none;color:var(--contour)}
.cgd-side a:hover{text-decoration:underline}
.cgd-index{margin-top:20px;border-top:1px solid var(--color-border);padding-top:14px}
.cgd-index ul{list-style:none;margin:10px 0 0;padding:0}
.cgd-index li{padding:6px 0;font-size:13px}
.cgd-index a{display:block;margin:0;font-weight:400;color:var(--color-text)}
.cgd-index span[aria-current]{font-weight:700;color:var(--contour)}
.cgd-faq,.cgd-related{margin-top:56px}
.cgd-faq h2,.cgd-related h2{font:600 29px var(--font-display);margin:0 0 16px;color:var(--ink)}
.cgd-faq details{border-bottom:1px solid var(--color-border);padding:15px 0}
.cgd-faq summary{cursor:pointer;font-weight:700}
.cgd-faq p{color:var(--color-text-muted);line-height:1.75}
.cgd-related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cgd-related-card{display:block;background:var(--card);padding:18px 20px 20px;border:1px solid var(--color-border);border-top:5px solid var(--contour);border-radius:var(--radius-md);text-decoration:none;color:inherit;transition:transform .16s}
.cgd-related-card:hover{transform:translateY(-3px)}
.cgd-related-card h3{font:600 20px/1.2 var(--font-display);margin:0 0 8px;color:var(--ink)}
.cgd-related-card p{font-size:14px;line-height:1.6;color:var(--color-text-muted);margin:0 0 12px}
.cgd-related-card span{font:700 14px var(--font-base);color:var(--contour)}
.cgd-disclaimer{margin:44px 0 0;padding:16px 18px;border-left:6px solid var(--contour);border-radius:var(--radius-sm);background:var(--card);font-size:14px;line-height:1.7;color:var(--color-text-muted)}
.site-footer{background:var(--card);border-top:1px solid var(--color-border);padding:32px 20px;text-align:center}
.footer-copyright{margin-top:14px;font-size:12px;color:var(--color-text-muted)}
/* tool surface */
[data-theme="map-tools"] .tool-row{gap:16px;margin-bottom:18px}
[data-theme="map-tools"] .tool-field{font-size:13px;font-weight:700;color:var(--color-text-muted);gap:7px}
[data-theme="map-tools"] .tool-input,[data-theme="map-tools"] .tool-textarea{border:1.5px solid var(--color-border);border-radius:var(--radius-sm);background:#fff;padding:10px 12px;font:16px/1.4 var(--font-base);color:var(--color-text)}
[data-theme="map-tools"] .tool-textarea{font-family:var(--font-mono);font-size:15px}
[data-theme="map-tools"] .tool-input:focus,[data-theme="map-tools"] .tool-textarea:focus{outline:0;border-color:var(--water);box-shadow:0 0 0 3px #2f78b433}
[data-theme="map-tools"] .tool-btn{border-radius:var(--radius-sm);font:700 14px var(--font-base)}
[data-theme="map-tools"] .tool-btn-primary{background:var(--contour);color:#fff;border:0}
[data-theme="map-tools"] .tool-result-box{margin-top:22px;padding:22px;border-radius:var(--radius-sm);background:#fff;border:1px solid var(--color-border);border-top:5px solid var(--contour);font-size:15px;word-break:normal}
[data-theme="map-tools"] .tool-stat-hero{margin:0 0 8px;font:600 clamp(32px,5.6vw,52px)/1.05 var(--font-display);color:var(--ink);overflow-wrap:anywhere}
[data-theme="map-tools"] .tool-unit{display:inline-block;margin-left:12px;font:600 15px var(--font-base);color:var(--contour);vertical-align:middle}
[data-theme="map-tools"] .tool-hint{font-size:14px;line-height:1.7;color:var(--color-text-muted);margin:8px 0 0}
[data-theme="map-tools"] .tool-hint strong{color:var(--ink)}
[data-theme="map-tools"] .tool-scroll{overflow-x:auto;margin-top:14px}
[data-theme="map-tools"] .tool-table td,[data-theme="map-tools"] .tool-table th{font-size:14px;background:#fff}
[data-theme="map-tools"] .tool-table td:last-child{font-family:var(--font-display);font-size:15px}
[data-theme="map-tools"] .tool-table th{background:var(--contour);color:var(--sheet)}
@media(max-width:960px){
.cg-grid,.cgd-related-grid{grid-template-columns:repeat(2,1fr)}
.cg-hero{grid-template-columns:minmax(0,1fr) 340px;gap:28px}
}
@media(max-width:768px){
.cg-hero{display:none}
.cg-home{padding:24px 16px 60px}
.cg-grid,.cgd-related-grid{grid-template-columns:1fr}
.cgd-head{padding-top:22px}
.cgd-layout{grid-template-columns:1fr;gap:28px}
.cgd-tool-body{padding:20px 16px}
.cgd-tool-label{padding:12px 16px}
}
@media(prefers-reduced-motion:reduce){
.cg-sheet .cg-c{animation:none;stroke-dashoffset:0}
.cg-sheet .cg-x{animation:none;opacity:1}
.cg-card:hover,.cgd-related-card:hover{transform:none}
}
[data-theme="map-tools"] .static-page-container a{color:var(--contour)}
[data-theme="map-tools"] .guide-breadcrumb a,[data-theme="map-tools"] .guide-index-link{color:var(--contour)}