:root{color-scheme:dark;font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:#0b1422;color:#edf4fa}*{box-sizing:border-box}body{margin:0}main{max-width:1440px;margin:auto;padding:36px 28px}header{display:flex;justify-content:space-between;align-items:start;gap:24px}h1{font-size:clamp(26px,4vw,40px);margin:0;letter-spacing:-1px}p{color:#aabdd0;line-height:1.6;margin:10px 0}button,.file-label{font:inherit;font-weight:600;border-radius:8px;padding:12px 18px;cursor:pointer;border:1px solid #486078;background:#172a3d;color:#eaf3fa;display:inline-block}button:disabled{opacity:.4;cursor:default}.file-label{background:#ffb45a;color:#17202a;border:0}button:hover:not(:disabled){background:#25415b}button:focus-visible,.file-label:focus-within{outline:3px solid #6dcde0;outline-offset:4px}.upload{border:1px dashed #547089;border-radius:12px;padding:24px;margin:28px 0 20px;display:flex;align-items:center;justify-content:space-between;gap:24px;background:#101e2e}.upload.drag{border-color:#ffb45a;background:#1d2a39}.upload p{margin:0;font-size:16px}.upload small{display:block;color:#aabdd0;font-size:14px;margin-top:6px}.file-input{position:absolute;width:1px;height:1px;opacity:0}#status{min-height:24px;font-size:15px}#status.error{color:#ffada4}.stats{display:flex;gap:32px;flex-wrap:wrap;margin:22px 0}.stat strong{display:block;font-size:24px}.stat span{color:#aabdd0;font-size:14px}.toolbar{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:16px}select{font:inherit;background:#172a3d;border:1px solid #486078;color:#edf4fa;padding:10px;border-radius:8px}.map{background:#101f30;border:1px solid #344a60;border-radius:12px;overflow:hidden}canvas{width:100%;display:block}.legend{font-size:14px;margin-top:12px;color:#aabdd0}.dot{display:inline-block;background:#ffad48;border-radius:50%;width:9px;height:9px;margin-right:8px}.note{font-size:14px;margin-top:24px}.brand{font-size:14px;color:#b9cbdb;white-space:nowrap;margin-top:12px}a{color:#8ed7ed}@media(max-width:650px){main{padding:24px 16px}header,.upload{flex-direction:column}.upload{align-items:start}.stats{gap:20px}.brand{margin-top:0}button,.file-label{padding:12px 15px}} 

.export-help{border:1px solid #344a60;border-radius:10px;background:#101e2e;margin:0 0 18px}.export-help summary{padding:16px 20px;cursor:pointer;font-size:16px;font-weight:600;color:#edf4fa}.export-help summary:focus-visible{outline:3px solid #6dcde0;outline-offset:3px}.export-help-body{padding:0 20px 14px;max-width:880px;font-size:16px;line-height:1.65}.export-help-body ol{padding-left:24px;color:#dce7f0}.export-help-body li{padding:5px 0}.export-help-body p{margin:12px 0}

.playback{background:#101e2e;border:1px solid #344a60;border-radius:12px;padding:20px;margin:0 0 20px}.playback-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.playback h2{font-size:20px;margin:0}.playback output{font-size:20px;color:#ffb45a;font-variant-numeric:tabular-nums;font-weight:600}.playback-controls{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:16px 0}.playback #play{min-width:88px;background:#ffb45a;color:#17202a;border-color:#ffb45a}.timeline-ends{display:flex;justify-content:space-between;gap:12px;color:#aabdd0;font-size:14px;font-variant-numeric:tabular-nums}#timeline-note{font-size:14px;margin:12px 0 0}@media(max-width:650px){.playback{padding:16px}.playback-controls{gap:10px}.playback-controls label{font-size:14px}}

.window-labels{display:flex;justify-content:space-between;font-size:14px;color:#c2d1df}.double-slider{position:relative;height:44px;--left:0%;--right:100%;margin:4px 10px}.window-rail{position:absolute;top:20px;height:5px;left:0;right:0;border-radius:4px;background:linear-gradient(to right,#486078 0%,#486078 var(--left),#ffb45a var(--left),#ffb45a var(--right),#486078 var(--right),#486078 100%)}.double-slider input[type=range]{position:absolute;inset:0;width:100%;height:44px;margin:0;background:transparent;pointer-events:none;appearance:none;-webkit-appearance:none;outline:none}.double-slider input::-webkit-slider-runnable-track{height:5px;background:transparent}.double-slider input::-moz-range-track{height:5px;background:transparent}.double-slider input::-webkit-slider-thumb{pointer-events:auto;appearance:none;-webkit-appearance:none;width:24px;height:24px;border-radius:50%;background:#ffb45a;border:3px solid #101e2e;margin-top:-10px;cursor:grab;box-shadow:0 0 0 1px #ffb45a}.double-slider input::-moz-range-thumb{pointer-events:auto;width:20px;height:20px;border-radius:50%;background:#ffb45a;border:3px solid #101e2e;cursor:grab;box-shadow:0 0 0 1px #ffb45a}.double-slider input:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 4px #6dcde0}.double-slider input:focus-visible::-moz-range-thumb{box-shadow:0 0 0 4px #6dcde0}.double-slider input:disabled{opacity:.4}.double-slider input:disabled::-webkit-slider-thumb{cursor:default}#timeline-end{z-index:4}#timeline-start{z-index:3}.window-dates{display:flex;justify-content:space-between;gap:16px;margin:4px 0 12px}.window-dates label{font-size:14px;color:#c2d1df;display:grid;gap:5px}.window-dates input{font:inherit;color:#edf4fa;background:#172a3d;border:1px solid #486078;border-radius:6px;padding:8px;min-width:0;max-width:100%;color-scheme:dark}.playhead{font-size:14px;color:#aabdd0;min-height:22px;margin:4px 0}@media(max-width:450px){.window-dates label{max-width:48%}.window-dates input{width:100%;font-size:14px}}

/* Phone layouts: readable controls, safe-area spacing and larger touch targets. */
button,select,.file-label,input[type=date]{min-height:44px;touch-action:manipulation}button,select,.file-label{max-width:100%}select:focus-visible,input[type=date]:focus-visible{outline:3px solid #6dcde0;outline-offset:3px}#status,.stat,.export-help-body,.note{overflow-wrap:anywhere}.stat{min-width:0}.window-dates input{font-size:16px}canvas{height:auto}.double-slider input{touch-action:pan-y}
@media(max-width:650px){
 main{display:flex;flex-direction:column;padding:20px max(12px,env(safe-area-inset-right)) max(24px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left))}
 header{order:0;gap:8px}header p{margin-bottom:0}.brand{white-space:normal}
 .upload{order:1;padding:16px;margin:20px 0 14px;gap:14px;align-items:stretch}.file-label{text-align:center;width:100%;min-height:48px}
 .export-help{order:2;margin-bottom:10px}.export-help summary{padding:14px 16px}.export-help-body{padding:0 16px 10px}
 #status{order:3;margin:6px 0}.stats{order:4;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:12px 0 18px}.stat:last-child{grid-column:1/-1}.stat strong{font-size:20px}.stat span{font-size:14px}
 .toolbar{order:5;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px 12px}.toolbar label{font-size:14px;align-self:center}.toolbar select{width:100%;min-width:0}.toolbar #download{grid-column:1/-1;width:100%;min-height:48px}.toolbar #clear{grid-column:1/-1}
 .map{order:6;margin:0 -4px 12px;border-radius:8px}.playback{order:7;margin:0 0 12px;padding:16px}.playback-heading{gap:6px}.playback output{font-size:16px}.playback h2{font-size:20px}
 .playback-controls{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}.playback-controls #play{grid-column:1;grid-row:1;min-height:48px}.playback-controls #show-all{grid-column:2;grid-row:1;min-height:48px}.playback-controls label{grid-column:1;grid-row:2;font-size:14px}.playback-controls select{grid-column:2;grid-row:2;width:100%;min-width:0}
 .double-slider{height:56px;margin:4px 20px}.window-rail{top:25px;height:6px}.double-slider input[type=range]{height:56px}.double-slider input::-webkit-slider-thumb{width:44px;height:44px;margin-top:-20px;border-width:8px}.double-slider input::-moz-range-thumb{box-sizing:border-box;width:44px;height:44px;border-width:8px}
 .window-dates{gap:12px}.window-dates label{min-width:0;max-width:none;flex:1}.window-dates input{width:100%;font-size:16px;min-height:48px;padding:8px 4px}.timeline-ends{font-size:14px}#timeline-note{line-height:1.6}
 .legend{order:8;line-height:1.6;margin-top:0}.note{order:9;margin-top:16px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}

.about-tool{margin-top:32px;padding-top:24px;border-top:1px solid #344a60;max-width:900px}.about-tool h2{font-size:22px;margin:0 0 12px}.about-tool h2:not(:first-child){margin-top:24px}.about-tool details{border-bottom:1px solid #344a60;padding:12px 0}.about-tool summary{font-size:16px;font-weight:600;cursor:pointer;line-height:1.6;min-height:44px}.about-tool p{font-size:16px}.about-tool .note{font-size:14px}.noscript-message{padding:16px;border:1px solid #ffb45a;margin:16px}@media(max-width:650px){.about-tool{order:10;margin-top:20px;padding-top:20px}.about-tool h2{font-size:20px}}

.map-options{display:flex;gap:20px;flex-wrap:wrap;margin:0 0 12px}.map-options label{display:flex;align-items:center;gap:8px;font-size:14px;min-height:44px;cursor:pointer}.map-options input{width:20px;height:20px;accent-color:#ffb45a}.city-summary{font-size:14px;line-height:1.6;margin:4px 0 10px}@media(max-width:650px){.map-options{order:6;gap:4px 16px;margin-bottom:4px}.city-summary{order:8}.map-options label{font-size:14px}}