:root{--bg:#363636;--panel:rgba(54,54,54,.96);--accent:#fff;--border:#555;--text:#fff;color-scheme:dark}*{box-sizing:border-box}html,body,#app{height:100%}body{margin:0;overflow:hidden;background:var(--bg);color:var(--text);font-family:SF Mono,Menlo,Consolas,monospace}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}#app{display:grid;grid-template-columns:minmax(260px,300px) minmax(0,1fr)}#sidebar{background:var(--panel);border-right:1px solid var(--border);padding:20px;overflow:auto;z-index:2}h1{margin:0;color:var(--accent);font-size:19px}.version{opacity:.5;font-size:9px;margin:5px 0 20px}section{border-top:1px solid var(--border);padding-top:14px;margin-bottom:18px}h2{border-left:2px solid var(--accent);padding-left:8px;margin:0 0 12px;font-size:10px;text-transform:uppercase;letter-spacing:.5px}select,input,button{width:100%;min-height:34px;padding:7px 8px;color:var(--text);background:#00000040;border:1px solid var(--border);border-radius:4px;font:inherit}label{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:8px 0;font-size:11px}label input[type=number]{width:82px;text-align:right}.compact-select{margin-top:8px}.compact-select select{width:145px;min-height:30px}.point-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}.point-grid>div{border:1px solid var(--border);padding:8px}.point-grid strong{display:block;color:var(--accent);font-size:10px;margin-bottom:5px}.point-grid input{min-height:28px;margin-bottom:5px}.point-grid button{min-height:28px;padding:4px;font-size:9px}.title-row{display:flex;align-items:center;justify-content:space-between}.title-row h2{margin-bottom:12px}.info-button{position:relative;width:11px;min-height:11px;padding:0;border-radius:50%;font-weight:700;font-size:8px;line-height:11px}.info-button:before{content:"";position:absolute;top:-16px;right:-16px;bottom:-16px;left:-16px}.toggle{cursor:pointer}.toggle input{display:none}.switch{width:34px;height:18px;border:1px solid var(--border);border-radius:12px;background:#21262d;position:relative}.switch:after{content:"";position:absolute;width:12px;height:12px;left:2px;top:2px;border-radius:50%;background:#fff;transition:transform .2s}@media(prefers-reduced-motion:reduce){.switch:after{transition:none}}.toggle input:checked+.switch{background:var(--accent)}.toggle input:checked+.switch:after{transform:translate(16px)}.readout{color:var(--accent);font-size:11px;margin-top:14px;min-height:16px}footer{display:grid;gap:8px;margin-top:25px}button{cursor:pointer;color:var(--accent);border-color:var(--accent);background:transparent}#map-container{position:relative;min-width:0;min-height:0;background:var(--bg);touch-action:none}canvas{display:block;width:100%;height:100%;cursor:crosshair}#status{position:absolute;top:0;right:0;bottom:0;left:0;z-index:1;display:grid;place-items:center;padding:24px;text-align:center;background:var(--bg);color:var(--text);font-size:13px}#guide{position:absolute;z-index:1;left:18px;bottom:18px;max-width:480px;padding:8px 10px;color:var(--accent);background:#00000059;border:1px solid var(--border);font-size:10px;pointer-events:none}#projection-help{position:absolute;z-index:3;top:18px;right:18px;width:min(360px,calc(100% - 36px));max-height:calc(100% - 36px);overflow:auto;padding:16px;color:var(--text);background:var(--panel);border:1px solid var(--accent);border-radius:6px;box-shadow:0 8px 30px #0008;display:none;font-size:11px;line-height:1.6}#projection-help.open{display:block}#projection-help h3{margin:14px 0 8px;color:var(--accent);font-size:14px}#projection-help p{margin:0 0 12px}#projection-help dl{margin:0}#projection-help dt{color:var(--accent);font-weight:700}#projection-help dd{margin:2px 0 10px}.help-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.help-head button{width:auto;min-height:26px;padding:4px 8px}.concept-block{border-top:1px solid var(--border);margin-top:12px;padding-top:10px}.concept-block h4{margin:0 0 6px;color:var(--accent);font-size:11px}.concept-block p{margin:0 0 7px!important}@media(max-width:720px){#app{grid-template-columns:1fr;grid-template-rows:minmax(320px,58svh) minmax(0,42svh)}#map-container{grid-row:1}#sidebar{grid-row:2;border-right:0;border-top:1px solid var(--border);padding:13px 16px calc(14px + env(safe-area-inset-bottom))}section{margin-bottom:12px}footer{margin-top:10px}}#app{grid-template-columns:minmax(300px,340px) minmax(0,1fr)}#sidebar{padding:18px}h2{font-size:12px}h2{position:relative;padding-right:24px}.section-info{position:absolute;right:0;top:-4px}select,input,button{min-height:38px;padding:8px 10px;font-size:12px}label{font-size:12px}.field-label{display:block;margin:12px 0 6px;font-weight:600}.field-hint{margin:8px 0 0;color:var(--text);opacity:.7;font-size:11px;line-height:1.45}.compact-select{display:grid;grid-template-columns:1fr;gap:6px;align-items:stretch;margin-top:12px}.compact-select select{width:100%;min-height:38px}.readout{font-size:12px}#comparison-controls{margin-top:14px;padding-top:12px;border-top:1px solid var(--border)}#map-presets button{margin-top:8px}#map-presets select{margin-bottom:2px}.comparison-toggle{margin:0 0 10px}#comparison-controls>.point-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}#comparison-controls .point-grid strong{grid-column:1 / -1}#comparison-controls .point-grid>button{grid-column:1 / -1}#comparison-controls .point-grid .coordinate-input{display:grid;grid-template-columns:42px minmax(0,1fr);align-items:center;gap:6px}#comparison-controls .point-grid .coordinate-input label{margin:0;font-size:11px}#comparison-controls .point-grid .coordinate-input input{min-width:0;min-height:34px}.location-coordinates{border:0;padding:0}.location-coordinates>strong{grid-column:1 / -1}.location-coordinates>button{grid-column:1 / -1}.location-coordinates>.coordinate-input{border:0;padding:0}.location-coordinates .coordinate-input{display:grid;grid-template-columns:42px minmax(0,1fr);align-items:center;gap:6px}.location-coordinates .coordinate-input label{margin:0;font-size:11px}.location-coordinates .coordinate-input input{min-width:0;min-height:34px}.location-heading{display:inline-flex;align-items:center;gap:8px}.location-marker{display:inline-block;width:13px;height:13px;border-radius:50% 50% 50% 0;transform:rotate(-45deg);flex:none}.location-marker:after{content:"";display:block;width:5px;height:5px;margin:4px;border-radius:50%;background:var(--panel)}.center-marker{background:#ff4d6d}.comparison-marker{background:#4dabf7}#comparison{line-height:1.5}.comparison-title{display:block;white-space:nowrap}.comparison-row{display:grid;grid-template-columns:56px minmax(0,1fr);gap:8px;margin-top:5px}.comparison-row span{opacity:.7}.comparison-row strong{min-width:0;overflow-wrap:anywhere}@media(max-width:720px){#app{grid-template-columns:1fr}#sidebar{padding:13px 16px calc(14px + env(safe-area-inset-bottom))}}