@charset "UTF-8";
:root{color-scheme:light dark;--canvas:#f5f7f8;--surface:#fff;--subtle:#f6f8fa;--text:#20282b;--muted:#53616b;--border:#d7dfe3;--control-border:#83929b;--accent:#176db0;--accent-soft:#eaf3fa;--focus:#145fa0;--good:#087a58;--moderate:#8a6500;--unhealthy:#b74708;--very-unhealthy:#b42335;--hazardous:#6f32a8;--unknown:#5a6570;--warning-bg:#fff7e6;--warning-text:#785314;--error-bg:#fff0ef;--error-text:#9a2733;--radius:12px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:16px;line-height:1.5}
*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--text)}a{color:var(--accent);text-underline-offset:3px}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:wait;opacity:.65}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--focus);outline-offset:3px}button,input,select{min-height:44px}input,select{width:100%;background:var(--surface);border:1px solid var(--control-border);border-radius:8px;padding:10px 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32px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);font-size:21px;font-weight:750;letter-spacing:-.4px;white-space:nowrap}.brand-light{font-weight:450}.brand-mark{width:38px;height:38px;background:var(--accent);color:#fff;border-radius:9px;display:grid!important;place-items:center}.brand-mark .icon{width:25px;height:25px}.header-inner nav{display:flex;align-items:center;gap:24px}.source-link{font-size:14px;text-decoration:none;color:var(--muted);display:flex;gap:6px;align-items:center}.source-link .icon{width:17px;height:17px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:8px;padding:10px 16px;font-weight:600;font-size:14px;text-decoration:none;border:1px solid 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1.15fr;gap:40px;align-items:center;padding:18px 0 22px}.reading{display:flex;align-items:center;gap:24px}.reading-value{font-size:78px;font-weight:650;letter-spacing:-3px;line-height:1.1;font-variant-numeric:tabular-nums}.reading-context{display:flex;flex-direction:column;gap:8px;font-size:14px}.category-badge{display:inline-flex;align-items:center;gap:7px;font-weight:700}.category-badge i{width:8px;height:8px;border-radius:50%;background:currentColor}.hero-meta{border-left:1px solid var(--border);padding-left:36px;display:grid;grid-template-columns:.8fr 1.4fr;gap:12px 24px}.meta-item{display:flex;flex-direction:column;gap:5px;font-size:15px}.meta-label{font-size:14px;letter-spacing:1px;color:var(--muted);font-weight:700}.freshness{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--muted);grid-column:1/-1}.freshness .icon{width:16px;height:16px}.freshness.stale,.freshness.unknown{color:var(--warning-text)}.hero-bottom{border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:12px 0;gap:8px}.action-group{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.saved-note{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:6px}.saved-note .icon{color:var(--good);width:17px;height:17px}.nearby-disclosure{display:flex;gap:10px;padding:12px 14px;border-radius:8px;font-size:14px;background:var(--accent-soft);margin-bottom:16px;color:var(--text)}.station-details{border-top:1px solid var(--border);padding:4px 0 8px}.station-details summary{font-size:14px;color:var(--muted);padding:10px 0;cursor:pointer;min-height:44px}.station-details dl{display:grid;grid-template-columns:150px 1fr;font-size:14px;gap:7px 16px;padding-bottom:16px}.station-details dt{color:var(--muted)}.station-details dd{margin:0;overflow-wrap:anywhere}.issue-list{font-size:14px;color:var(--warning-text);padding-left:20px}.welcome-hero{padding:36px;display:grid;grid-template-columns:1.8fr 1fr;gap:48px;align-items:center}.welcome-hero h2{font-size:29px;margin-bottom:10px}.welcome-hero p{max-width:550px;margin-bottom:24px}.welcome-aside{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;font-size:14px;color:var(--muted);border-left:1px solid var(--border);padding:12px 24px}.welcome-pin{width:64px;height:64px;border-radius:18px;color:var(--accent);background:var(--accent-soft);display:grid;place-items:center;margin-bottom:10px}.welcome-pin .icon{width:32px;height:32px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin:32px 0 20px}.section-heading .eyebrow{margin-bottom:6px}.count-badge{display:inline-block;font-size:14px;line-height:26px;min-width:28px;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:6px;letter-spacing:0;vertical-align:middle;margin-left:8px;color:var(--muted);padding:0 6px}.snapshot-time{font-size:14px;color:var(--muted);text-align:right}.toolbar{display:grid;grid-template-columns:1.9fr 1fr 1fr;gap:16px}.toolbar label{display:flex;flex-direction:column;gap:6px;font-size:14px;color:var(--muted);font-weight:550}.input-with-icon{position:relative}.input-with-icon>span{position:absolute;left:12px;top:12px;color:var(--muted)}.input-with-icon input{padding-left:40px}.results-bar{display:flex;align-items:center;gap:12px;min-height:60px;font-size:14px;color:var(--muted)}.view-switch{display:none;margin-left:auto;border:1px solid var(--border);border-radius:8px;background:var(--surface);padding:3px}.view-switch button{display:flex;align-items:center;justify-content:center;gap:6px;font-size:14px;padding:8px 10px;border:0;border-radius:5px;background:transparent}.view-switch button[aria-pressed=true]{background:var(--accent-soft);color:var(--accent);font-weight:650}.view-switch .icon{width:16px;height:16px}.explorer-grid{display:grid;grid-template-columns:40% 60%;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--surface);min-width:0}.list-panel{border-right:1px solid var(--border);min-width:0}.station-list{list-style:none;margin:0;padding:0;max-height:582px;min-height:420px;overflow:auto;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.station-row{position:relative;display:flex;border-bottom:1px solid var(--border);min-width:0}.station-row:last-child{border-bottom:0}.station-row.selected{background:var(--accent-soft);box-shadow:inset 3px 0 var(--accent)}.station-select{border:0;background:transparent;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:19px 12px 19px 20px;width:100%;min-width:0;text-align:left}.station-select:hover{background:var(--subtle)}.station-row.selected .station-select:hover{background:transparent}.station-main{display:flex;flex-direction:column;gap:3px;min-width:0}.station-main strong{font-size:16px;line-height:1.3;font-weight:650;overflow-wrap:anywhere}.station-main>.muted{font-size:14px}.station-time{font-size:14px;color:var(--muted);line-height:1.45;margin-top:3px}.station-measure{text-align:right;display:flex;flex-direction:column;gap:3px;flex-shrink:0}.station-value{font-size:29px;font-weight:650;font-variant-numeric:tabular-nums;line-height:1.1;letter-spacing:-.5px}.station-category{font-size:14px;font-weight:600;max-width:90px}.station-map-button{border:0;background:transparent;width:44px;flex-shrink:0;padding:0;color:var(--muted)}.station-map-button:hover{color:var(--accent)}.station-map-button .icon{width:18px;height:18px}.list-empty{min-height:420px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px;text-align:center;gap:12px}.list-empty>.icon{width:32px;height:32px;color:var(--muted)}.list-empty p{font-size:14px}.map-panel{min-width:0;position:relative}.map-toolbar{height:50px;display:flex;align-items:center;justify-content:space-between;padding:0 12px;border-bottom:1px solid var(--border);gap:6px;font-size:14px}.map-toolbar .button{font-size:14px;padding:6px 8px}.map-wrap{position:relative}.map-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:0 12px;font-size:14px;min-height:44px;color:var(--muted);border-top:1px solid var(--border)}.map-bottom .button{font-size:14px}.place-dot{display:inline-block;width:8px;height:8px;background:var(--accent);border-radius:50%;border:1px solid var(--surface);outline:1px solid var(--accent);margin-right:3px}#station-map{height:488px;background:#eaf0f2;z-index:0}.map-loading{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);font-size:14px;gap:12px;pointer-events:none}.map-loading .icon{width:30px;height:30px}.map-status{position:absolute;bottom:20px;left:20px;right:20px;z-index:500;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:16px;font-size:14px;box-shadow:0 2px 8px #0000000a}.map-status p{margin-bottom:10px}.skip-map{position:absolute;z-index:800;left:10px;top:50px;transform:translateX(-10000px);background:var(--surface);padding:12px}.skip-map:focus{transform:none}.good{color:var(--good)}.moderate{color:var(--moderate)}.unhealthy{color:var(--unhealthy)}.very-unhealthy{color:var(--very-unhealthy)}.hazardous{color:var(--hazardous)}.unknown{color:var(--unknown)}.marker-number{position:relative;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--surface);border:2px solid currentColor;border-radius:50%;font:700 14px/1 -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;box-shadow:0 2px 4px #0002}.marker-number.active{outline:3px solid var(--accent);outline-offset:4px}.marker-number.aged{border-style:dashed}.marker-alert{position:absolute;right:-5px;top:-7px;color:var(--warning-text);background:var(--warning-bg);border:1px solid currentColor;font-size:14px;line-height:16px;width:18px;height:18px;border-radius:50%;text-align:center}.place-marker{display:block;font-size:23px;line-height:24px;text-align:center;color:var(--accent);text-shadow:0 0 2px white,0 0 5px white}.map-popup{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:14px;color:var(--text)}.map-popup p{margin:8px 0!important}.map-popup .button{margin-top:4px}.leaflet-popup-content-wrapper,.leaflet-popup-tip{background:var(--surface)!important;color:var(--text)!important}.leaflet-control-zoom a{min-width:44px;min-height:44px;line-height:44px!important;background:var(--surface)!important;color:var(--text)!important}.leaflet-control-attribution{background:var(--surface)!important;color:var(--muted)!important;font-size:14px!important}.leaflet-control-attribution a{color:var(--accent)!important}.guide{margin:32px 0;border-top:1px solid var(--border);padding-top:28px}.guide-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px}.guide h2{font-size:20px}.guide-heading p{font-size:14px}.legend{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}.legend-item{display:flex;flex-direction:column;gap:4px;font-size:14px}.legend-item strong{font-size:14px;font-weight:600}.legend-line{display:block;height:4px;background:currentColor;border-radius:2px;margin-bottom:5px}.guide-note{font-size:14px;color:var(--muted);margin-top:16px}.site-footer{border-top:1px solid var(--border);background:var(--surface)}.footer-inner{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;padding-top:26px;padding-bottom:30px;font-size:14px;color:var(--muted)}.footer-brand{font-size:17px;margin-bottom:8px}.privacy summary{cursor:pointer;text-align:right;color:var(--text);min-height:44px;padding:10px 0}.privacy p{margin:8px 0;font-size:14px}.notice{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--warning-bg);color:var(--warning-text);padding:12px 16px;border:1px solid #b6955755;border-radius:8px;margin-bottom:16px;font-size:14px}.notice.error{color:var(--error-text);background:var(--error-bg)}.quality-notice{font-size:14px;color:var(--muted);margin-top:12px;max-width:900px}.inline-warning{color:var(--warning-text);background:var(--warning-bg);padding:10px 12px;border-radius:6px;font-size:14px}.inline-warning:empty{display:none}.inline-note{background:var(--accent-soft);border-radius:6px;padding:12px;font-size:14px;margin:12px 0}.toast{position:fixed;z-index:3000;left:50%;bottom:24px;transform:translateX(-50%);max-width:min(560px,calc(100% - 32px));width:max-content;box-shadow:0 4px 20px #0002;background:var(--text);color:var(--surface);padding:14px 20px;border-radius:8px;font-size:14px}dialog{border:1px solid var(--border);padding:0;background:var(--surface);color:var(--text);width:min(620px,calc(100vw - 32px));border-radius:12px;max-height:calc(100dvh - 48px);box-shadow:0 20px 80px #0003}dialog::backdrop{background:#152c3c77;backdrop-filter:blur(3px)}.dialog-header{display:flex;align-items:flex-start;justify-content:space-between;padding:24px;border-bottom:1px solid var(--border);gap:16px}.dialog-header h2{font-size:24px}.dialog-header .eyebrow{font-size:14px;margin-bottom:6px}.icon-button{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--border);background:var(--surface);border-radius:8px;flex-shrink:0}.dialog-body{padding:24px;overflow:auto;max-height:calc(100dvh - 190px)}.picker-search{display:block;font-size:14px;font-weight:600;margin-bottom:8px}.picker-note{font-size:14px;margin:12px 0}.result-group{font-size:14px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);padding:16px 0 8px}.location-result{display:flex;align-items:center;gap:12px;border:1px solid transparent;border-bottom-color:var(--border);width:100%;background:transparent;text-align:left;padding:12px 8px;border-radius:6px}.location-result:hover{background:var(--accent-soft)}.location-result>span{display:flex;flex-direction:column;gap:3px;flex:1}.location-result strong{font-size:15px}.location-result .icon{color:var(--muted);width:18px;height:18px}.manual-details{border-top:1px solid var(--border);margin-top:24px;padding-top:8px}.manual-details summary{font-size:14px;cursor:pointer;min-height:44px;padding:10px 0}.manual-details>button{margin:8px 0 16px}.manual-details form>label,.coordinate-fields>label{display:flex;flex-direction:column;font-size:14px;gap:6px;margin-bottom:12px}.coordinate-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}.manual-details form p{font-size:14px;margin:4px 0 16px}.candidate{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 0;border-bottom:1px solid var(--border)}.candidate>div{display:flex;flex-direction:column;gap:4px;min-width:0}.candidate strong{font-size:16px;overflow-wrap:anywhere}.candidate .eyebrow{font-size:14px;margin-bottom:2px}.candidate .muted{font-size:14px}.candidate small{font-size:14px}#candidates h3{margin:8px 0}#candidates>.muted{font-size:14px}.initial-skeleton{padding:32px;color:var(--muted);font-size:14px}.skeleton-line{width:20%;height:20px;background:var(--border);border-radius:4px;margin-bottom:20px}.skeleton-line.wide{width:65%;height:42px}.skip-link{position:fixed;top:-100px;left:16px;z-index:5000;padding:12px;background:var(--surface)}.skip-link:focus{top:8px}.sr-only{position:absolute;clip:rect(0,0,0,0);clip-path:inset(50%);height:1px;width:1px;overflow:hidden;white-space:nowrap}[hidden]{display:none!important}
@media(prefers-color-scheme:dark){:root{--canvas:#191919;--surface:#222424;--subtle:#292d2e;--text:#f5f7f8;--muted:#b7c0c5;--border:#4a5358;--control-border:#7d909c;--accent:#8dc8fa;--accent-soft:#233645;--focus:#b3dcff;--good:#78d3ad;--moderate:#eed17b;--unhealthy:#f7b080;--very-unhealthy:#ff9faa;--hazardous:#d1a9ff;--unknown:#bac6cc;--warning-bg:#3b3322;--warning-text:#f1d29b;--error-bg:#3f292c;--error-text:#ffaab0}.primary,.brand-mark{background:#246fa8;color:#fff}#station-map{background:#28363d}.toast{background:#e9eff2;color:#1c252c}}
@media(min-width:768px) and (max-width:1023px){.page-shell,.header-inner{padding-left:24px;padding-right:24px}.hero-body{gap:20px;grid-template-columns:1fr 1fr}.hero-meta{padding-left:20px;grid-template-columns:1fr}.reading{gap:14px}.reading-value{font-size:68px}.explorer-grid{grid-template-columns:44% 56%}.station-time{font-size:14px}.snapshot-time{max-width:220px}.guide-heading{display:block}.guide-heading p{margin-top:6px}.legend{gap:10px}.station-select{gap:8px;padding-left:16px}.station-map-button{width:36px}}
@media(max-width:767px){h1{font-size:31px;letter-spacing:-.9px}h2{font-size:24px}.page-shell{padding:0 16px}.header-inner{padding:14px 16px;gap:10px}.brand{font-size:19px;gap:8px}.brand-mark{width:32px;height:32px}.brand-mark .icon{width:23px;height:23px}.source-link{display:none}.header-inner nav{gap:0}.header-inner .button{padding:8px 10px;min-width:44px}.page-intro{padding:26px 0 20px;display:block}.page-intro>.button{display:none}.page-intro .eyebrow{font-size:14px;letter-spacing:1.1px}.intro-copy{font-size:14px;max-width:350px}.selected-hero{padding:20px 18px 0}.hero-top{gap:10px;flex-wrap:wrap}.hero-top h2{font-size:28px}.hero-top>.button{padding:8px 10px}.hero-top .eyebrow{font-size:14px}.station-source{font-size:14px}.hero-body{display:block;padding:20px 0}.reading{gap:24px;justify-content:flex-start}.reading-value{font-size:72px}.hero-meta{margin-top:22px;padding:16px 0 0;border:0;border-top:1px solid var(--border);grid-template-columns:.75fr 1.3fr;gap:12px}.meta-item{font-size:14px}.meta-label{font-size:14px}.hero-bottom{align-items:flex-start;flex-wrap:wrap}.action-group{gap:4px;flex:1;min-width:160px}.saved-note{font-size:14px}.hero-bottom>.button{padding:8px 0;font-size:14px}.hero-bottom .small{font-size:14px}.nearby-disclosure{font-size:14px;margin-bottom:16px;padding:10px}.welcome-hero{display:block;padding:26px 22px}.welcome-hero h2{font-size:26px}.welcome-hero p{font-size:14px;margin-bottom:20px}.welcome-aside{display:none}.welcome-hero .primary{width:100%}.section-heading{margin-top:28px;display:block}.section-heading h2{font-size:24px}.section-heading .eyebrow{font-size:14px}.snapshot-time{text-align:left;font-size:14px;margin-top:10px}.toolbar{grid-template-columns:1fr 1fr;gap:12px}.search-control{grid-column:1/-1}.toolbar label{font-size:14px}.toolbar input,.toolbar select{font-size:14px}.results-bar{min-height:64px;font-size:14px;flex-wrap:wrap;gap:4px}.results-bar>.button{font-size:14px;padding:6px}.view-switch{display:flex}.explorer-grid{display:block}.explorer[data-view=list] .map-panel{display:none}.explorer[data-view=map] .list-panel{display:none}.list-panel{border-right:0}.station-list{max-height:530px;min-height:380px}.station-select{padding:18px 10px 18px 16px;gap:12px}.station-main strong{font-size:16px}.station-time{font-size:14px}.station-map-button{width:44px}.station-value{font-size:30px}.station-category{font-size:14px}.map-toolbar .muted{font-size:14px}.map-toolbar .button{font-size:14px}.map-bottom{font-size:14px}#station-map{height:420px}.map-status{left:12px;right:12px;bottom:14px;font-size:14px;padding:14px}.guide{padding-top:22px;margin:28px 0}.guide-heading{display:block}.guide-heading p{font-size:14px;margin-top:8px}.legend{grid-template-columns:repeat(3,1fr);gap:18px 12px}.legend-item strong{font-size:14px}.guide-note{font-size:14px}.footer-inner{display:block;padding-top:24px;padding-bottom:24px;font-size:14px}.privacy{margin-top:12px}.privacy summary{text-align:left}.notice{align-items:flex-start;flex-wrap:wrap;font-size:14px;padding:12px}.dialog-header{padding:20px 16px;gap:10px}.dialog-header h2{font-size:22px}.dialog-body{padding:16px;max-height:calc(100dvh - 170px)}.dialog-header .eyebrow{font-size:14px}.candidate{align-items:flex-start;flex-wrap:wrap;gap:12px}.candidate>div{width:100%}.candidate>.button{width:100%}.location-result{padding:12px 4px}.station-details dl{grid-template-columns:110px 1fr;font-size:14px}.quality-notice{font-size:14px}.toast{bottom:16px;font-size:14px;padding:12px 16px}.coordinate-fields{gap:10px}.coordinate-fields input{min-width:0}.list-empty{min-height:360px}}
@media(max-width:360px){h1{font-size:28px}.brand{font-size:17px}.header-inner .button{font-size:14px;padding:8px}.header-inner .icon{width:17px}.hero-top>.button{min-height:44px}.hero-top h2{font-size:25px}.reading{gap:18px}.reading-value{font-size:64px}.reading-context{font-size:14px}.hero-meta{grid-template-columns:1fr}.meta-item{gap:2px}.view-switch button{font-size:14px;padding:6px}.station-select{padding-left:12px;gap:8px}.station-main strong{font-size:15px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}