:root{--bg:#f7f9f6;--ink:#1e3029;--muted:#64736b;--green:#17634b;--green-dark:#104b39;--line:#dfe6df;--soft:#edf3ec;--white:#fff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:14px;line-height:1.65}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}a{color:var(--green);text-underline-offset:4px}button{cursor:pointer}button:disabled{cursor:default;opacity:.48}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #ad7c18;outline-offset:4px}input:focus{outline:3px solid #d5e5db;border-color:var(--green)}[hidden]{display:none!important}.wrap{width:min(1200px,calc(100% - 64px));margin-inline:auto}.icon{flex-shrink:0;vertical-align:middle}.site-header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;gap:9px;align-items:center;text-decoration:none;color:var(--ink);font-weight:800;letter-spacing:-.7px;font-size:21px}.brand-mark{background:var(--green);color:white;display:grid;place-items:center;width:33px;height:33px;border-radius:9px}.brand-mark .icon{width:23px;height:23px}.brand-divider{height:22px;width:1px;background:var(--line);margin:0 5px}.brand-tools{font-size:15px;font-weight:500;color:var(--muted);letter-spacing:0}.header-inner nav{display:flex;align-items:center;gap:30px}.header-inner nav a{color:var(--muted);text-decoration:none;font-size:13px;font-weight:550}.header-inner nav a:hover{color:var(--green)}.home-link{display:flex;align-items:center;gap:9px}.home-link .icon{width:16px}.breadcrumb{display:flex;gap:12px;font-size:12px;color:var(--muted);margin:26px 0 30px}.breadcrumb a{text-decoration:none;color:var(--muted)}.hero{display:flex;justify-content:space-between;align-items:center;gap:30px;margin-bottom:32px}.eyebrow{font-size:10px;letter-spacing:1.7px;font-weight:750;color:var(--green);margin:0 0 10px}.hero .eyebrow{display:flex;align-items:center;gap:8px}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--green)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(30px,3.5vw,45px);letter-spacing:-1.9px;font-weight:700;line-height:1.2;margin-bottom:16px}.title-dot{color:var(--green)}.intro{font-size:15px;color:var(--muted);line-height:1.8;margin:0}.hero-note{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--muted);padding:12px 0 12px 25px;border-left:1px solid var(--line);flex-shrink:0}.hero-note .icon{width:27px;height:27px;color:var(--green)}.hero-note strong{font-weight:550;color:var(--ink)}.workspace{display:grid;grid-template-columns:360px minmax(0,1fr);background:#fff;border:1px solid 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#d7dfd8;border-radius:7px;background:#fff;color:var(--ink);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px}.field input::placeholder{color:#7e8982;font-size:12px}.field small{display:block;font-size:10px;margin-top:5px;color:var(--muted)}.field-error{display:block;color:#a42c2c;font-size:11px}.field input[aria-invalid=true]{border-color:#bd3c3c}.example-row{display:flex;align-items:center;gap:6px;font-size:10px;margin-top:15px;flex-wrap:wrap;color:var(--muted)}.example-row button,.text-button{border:0;background:transparent;color:var(--green);padding:7px 0;font-size:inherit;text-decoration:underline;text-underline-offset:3px}.status-message{font-size:11px;line-height:1.6;margin:12px 0 0;padding:10px 12px;background:#f6f8f5;border-radius:6px;color:var(--muted)}.status-message.error{background:#fff1ef;color:#a42c2c}.status-message.success{color:var(--green)}.map-panel{display:flex;flex-direction:column;min-width:0}.map-heading{min-height:63px;padding:17px 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output{font:500 clamp(19px,2.1vw,27px)/1.5 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:-1px}.dms{color:var(--muted);font:11px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;margin:9px 0 3px}.accuracy{color:var(--muted);font-size:10px;margin-bottom:16px}.result-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.small{font-size:11px;min-height:38px;padding:8px 11px;gap:7px}.small .icon{width:14px;height:14px}.map-link{font-size:11px;display:flex;gap:6px;align-items:center;margin-left:auto;text-decoration:none;min-height:38px}.map-link .icon{width:13px;height:13px}#copy-fallback{margin-top:12px;font-size:12px}#copy-text{width:100%;padding:8px;border:1px solid var(--line);border-radius:5px}.privacy-note{display:flex;align-items:flex-start;justify-content:center;gap:7px;font-size:10px;color:var(--muted);margin:17px 0 0}.privacy-note .icon{width:14px;height:14px;margin-top:2px}.guide-section{padding:66px 0 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.brand{font-size:16px}.site-footer .brand-tools{font-size:12px}.site-footer p{margin:0;font-size:11px;color:var(--muted);flex:1}.site-footer a:not(.brand),.site-footer span:last-child:not(.brand-tools){font-size:10px;color:var(--muted)}.skip-link{position:absolute;left:20px;top:-100px;z-index:10;background:white;padding:12px}.skip-link:focus{top:15px}@media(min-width:1440px){.wrap{width:min(1240px,calc(100% - 96px))}.hero{margin-bottom:38px}.workspace{grid-template-columns:380px minmax(0,1fr)}.control-panel{padding:30px}}@media(max-width:1000px){.wrap{width:calc(100% - 40px)}.workspace{grid-template-columns:320px minmax(0,1fr)}.control-panel{padding:22px}.hero-note{display:none}.knowledge{gap:25px;padding:25px}.coordinate-reference{padding:17px}.coordinate-reference>p{font-size:15px}.faq-section{gap:30px}.map-link{margin-left:0}}@media(max-width:760px){.wrap{width:calc(100% - 32px)}.header-inner{min-height:68px}.header-inner nav{gap:18px}.header-inner nav .home-link{display:none}.brand{font-size:18px}.brand-divider{margin:0}.brand-tools{font-size:13px}.breadcrumb{margin:22px 0}.hero{margin-bottom:25px}h1{font-size:35px;max-width:480px;letter-spacing:-1.5px}.intro{font-size:13px}.workspace{grid-template-columns:1fr}.control-panel{border-right:0;border-bottom:1px solid var(--line);padding:24px}.map-heading{padding-inline:22px}.map-canvas{min-height:320px}.result-panel{padding:19px 22px 23px}.coordinate-results output{font-size:25px}.privacy-note{font-size:10px;justify-content:flex-start}.section-heading{display:block}.section-heading>p{display:none}.guide-section{padding:45px 0 25px}.section-heading h2{font-size:23px}.steps{gap:18px}.steps p{font-size:11px}.knowledge{grid-template-columns:1fr;gap:20px}.coordinate-reference>p{font-size:21px}.faq-section{grid-template-columns:1fr;gap:12px;padding:42px 0 25px}.faq-section .muted br{display:none}.related{align-items:flex-start;flex-direction:column;gap:16px}.related>div{gap:15px 24px}.site-footer>.wrap{flex-wrap:wrap;gap:15px}.site-footer p{flex-basis:60%}.site-footer>.wrap>span:last-child{margin-left:auto}}@media(max-width:420px){.brand-tools,.brand-divider{display:none}.header-inner nav{gap:16px}.header-inner nav a{font-size:12px}.hero .eyebrow{font-size:9px}h1{font-size:32px}.desktop-break{display:none}.control-panel{padding:21px}.coordinate-results{gap:12px}.coordinate-results output{font-size:21px}.dms{font-size:10px}.map-heading{padding-inline:18px}.result-panel{padding-inline:18px}.steps{grid-template-columns:1fr;gap:0}.steps li{position:relative;padding:19px 0 19px 45px}.step-number{position:absolute;left:0;top:22px}.steps p{font-size:12px;max-width:none}.knowledge{padding:21px}.coordinate-reference{padding:14px}.coordinate-reference>p{font-size:17px}.coordinate-reference>div{gap:18px;font-size:9px}.site-footer p{flex-basis:100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}
/* Avoid automatic input zoom on mobile Safari. */
@media(max-width:760px){.field input,#copy-text{font-size:16px}}
/* Number converter */
.workspace{grid-template-columns:390px minmax(0,1fr)}.control-panel{padding:28px}.control-panel h2{font-size:22px}.base-picker{border:0;margin:0 0 20px;padding:0;min-width:0}.base-picker legend{font-size:12px;font-weight:650;margin-bottom:9px}.base-picker>div{display:grid;grid-template-columns:1fr 1fr;gap:8px}.base-picker label{position:relative;display:flex;align-items:center;gap:8px;padding:11px 10px;border:1px solid var(--line);border-radius:7px;cursor:pointer}.base-picker label:has(input:checked){background:#edf4ea;border-color:#86ab8d}.base-picker input{accent-color:var(--green);width:14px;height:14px;margin:0;flex-shrink:0}.base-picker input:focus-visible{outline:3px solid #ad7c18;outline-offset:2px}.base-picker strong{display:block;font-size:11px;font-weight:600}.base-picker small{display:block;font-size:9px;color:#536358}.base-code{font:9px ui-monospace,monospace;color:var(--green);margin-left:auto}.field label>span{font-size:12px;color:var(--ink);font-weight:650}.field label>button{border:0;background:none;color:var(--green);font-size:11px;text-decoration:underline;text-underline-offset:3px;padding:0}.field textarea{width:100%;min-height:108px;padding:13px;border:1px solid #d7dfd8;border-radius:8px;color:var(--ink);background:#fff;resize:vertical;font:15px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace}.field textarea::placeholder{color:#77847c;font-size:12px}.field textarea:focus,textarea:focus-visible{outline:3px solid #d5e5db;border-color:var(--green)}.field textarea[aria-invalid=true]{border-color:#bd3c3c}.input-actions{display:flex;justify-content:space-between;align-items:center;margin-top:6px;font-size:10px;color:var(--muted)}.input-actions .text-button{font-size:11px}.input-note{display:flex;align-items:flex-start;gap:8px;border-top:1px solid var(--line);padding-top:17px;margin-top:20px;color:var(--muted)}.input-note .icon{width:16px;height:16px;margin-top:2px}.input-note p{font-size:10px;margin:0}.conversion-panel{min-width:0;display:flex;flex-direction:column}.conversion-panel>.map-heading{border-bottom:1px solid var(--line)}.empty-state{min-height:410px;flex:1;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:28px;background:radial-gradient(ellipse at 50% 36%,#edf3e8 0,transparent 65%)}.conversion-art{width:340px;max-width:100%;color:var(--green);margin-bottom:28px}.main-number{width:125px;max-width:80%;margin:auto;padding:12px 18px;background:#fff;border:1px solid #d8e4d2;border-radius:10px}.main-number>span{display:block;font-size:8px;letter-spacing:1.5px;color:var(--muted)}.main-number strong{font:500 31px/1.5 ui-monospace,monospace}.art-connector{width:1px;height:27px;margin:auto;background:#c8d9c1}.number-nodes{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:9px}.number-nodes>div{background:#f9fcf6;border:1px solid #d9e4d1;border-radius:7px;padding:9px 6px}.number-nodes span{display:block;font-size:8px;letter-spacing:1.2px;color:var(--muted);margin-bottom:4px}.number-nodes code{font-size:12px}.conversion-art>small{display:block;font-size:8px;letter-spacing:1.5px;color:var(--muted);margin-top:18px}.empty-state h3{font-size:20px;letter-spacing:-.6px;margin:0 0 9px;font-weight:650}.empty-state>p{font-size:13px;color:var(--muted);line-height:1.8;margin-bottom:20px}.empty-tags{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}.empty-tags span{font-size:10px;color:var(--muted);padding:4px 10px;background:#f1f5ee;border:1px solid #e8eee3;border-radius:20px}.result-footnote{display:flex;align-items:center;justify-content:center;gap:7px;font-size:10px;color:var(--muted);background:#f7f9f5;padding:13px 24px;margin-top:auto;border-top:1px solid var(--line)}.result-footnote .icon{width:14px;height:14px}.conversion-results{padding:20px 24px}.result-toolbar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:17px}.result-toolbar>p{font-size:10px;color:var(--muted);margin:0;max-width:55%}.number-results{display:grid;gap:12px}.number-card{border:1px solid var(--line);border-radius:9px;overflow:hidden}.number-card.is-source{border-color:#96b49a}.number-card header{display:flex;justify-content:space-between;align-items:center;gap:10px;background:#f7f9f5;padding:9px 12px;border-bottom:1px solid var(--line)}.number-card header>div{display:flex;gap:7px;align-items:center;flex-wrap:wrap}.number-card h3{font-size:12px;letter-spacing:0;margin:0}.base-badge{display:inline-block;font:9px ui-monospace,monospace;color:var(--green);background:#e8f0e3;border-radius:4px;padding:3px 6px}.base-caption{font-size:9px;color:var(--muted)}.number-card button{border:0;color:var(--green);background:transparent;display:flex;align-items:center;gap:5px;font-size:10px;padding:5px;min-height:28px;flex-shrink:0}.number-card button .icon{width:12px;height:12px}.number-card output{display:block;padding:12px 13px 5px;font:500 18px/1.65 ui-monospace,SFMono-Regular,Consolas,monospace;overflow-wrap:anywhere;user-select:all;color:var(--ink);max-height:150px;overflow:auto;scrollbar-gutter:stable}.number-card output:focus-visible{outline:2px solid var(--green);outline-offset:-2px}.result-digits{font-size:9px;color:var(--muted);margin:0;padding:0 13px 10px}.normalized-note{font-size:10px;color:var(--muted);margin:13px 0 0}.conversion-reference{padding:23px;background:#f7f9f3;border:1px solid #d8e2d0;border-radius:10px}.conversion-reference dl{margin:15px 0 0}.conversion-reference dl>div{display:flex;gap:20px;align-items:center;justify-content:space-between;padding:12px 0;border-top:1px solid var(--line)}.conversion-reference dt{font-size:11px;color:var(--muted)}.conversion-reference dd{font:16px ui-monospace,monospace;color:var(--green);margin:0}.bases-section{padding:43px 0 0}.bases-section h2{font-size:24px}.bases-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:23px}.bases-grid>div{background:white;border:1px solid var(--line);border-radius:9px;padding:19px}.bases-grid h3{font-size:14px;margin:12px 0 3px}.bases-grid p{font-size:10px;color:var(--muted);margin-bottom:12px}.bases-grid code{font-size:13px;color:var(--green)}.worked-example{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;margin-top:35px;padding:25px 0;border-block:1px solid var(--line)}.worked-example h2{font-size:21px}.worked-example p:not(.eyebrow){font-size:12px;color:var(--muted);margin-bottom:0}.formula{font:17px/1.8 ui-monospace,monospace;text-align:center;color:var(--green);padding:20px;background:#edf3e8;border:1px solid #e1e8dc;border-radius:9px}.formula>span{display:block;font-size:14px;color:var(--muted)}.formula sub{font-size:10px}#copy-text{width:100%;margin-top:7px;padding:10px;border-radius:6px;border:1px solid var(--line);font:12px/1.7 ui-monospace,monospace;resize:vertical}@media(min-width:1440px){.workspace{grid-template-columns:410px minmax(0,1fr)}}@media(max-width:1000px){.workspace{grid-template-columns:340px minmax(0,1fr)}.control-panel{padding:22px}.base-code{display:none}.conversion-results{padding:20px}.empty-state h3{font-size:18px}.worked-example{gap:25px}}@media(max-width:760px){.workspace{grid-template-columns:1fr}.control-panel{padding:24px}.base-code{display:block}.field textarea{font-size:16px}.conversion-results{padding:22px}.empty-state{min-height:370px;padding:25px 22px}.result-footnote{align-items:flex-start;padding:13px 22px}.bases-grid{grid-template-columns:1fr 1fr;gap:14px}.worked-example{grid-template-columns:1fr;gap:20px}.conversion-reference{padding:20px}#copy-text{font-size:16px}.number-card output{font-size:17px}}@media(max-width:420px){.control-panel{padding:21px}.control-panel h2{font-size:21px}.base-picker label{padding:10px 8px;gap:6px}.base-code{font-size:8px}.base-picker strong{font-size:10px}.empty-state h3{font-size:18px}.conversion-results{padding:18px}.result-toolbar{gap:8px}.result-toolbar .small{font-size:10px;padding:8px}.number-card header{padding:8px 10px}.number-card h3{font-size:11px}.base-caption{font-size:8px}.number-card output{font-size:16px}.bases-grid>div{padding:16px}.hero .eyebrow{font-size:8px;letter-spacing:1.2px}}