/* Base Web references: neutral surfaces, filled inputs, clear selection,
   tab navigation and list rows. Implemented with HTML + CSS, without React. */
:root {
  color-scheme:light;
  --page:#fff; --panel:#fff; --surface:#f3f3f3; --surface-hover:#e8e8e8;
  --text:#202020; --muted:#606060; --line:#e2e2e2; --strong:#181818;
  --accent:#176b4b; --accent-dark:#105239; --accent-soft:#edf5ef; --focus:#176b4b;
  --ocean:#eff4f6; --land:#dce4df; --land-edge:#b5c3ba;
  --cat-0:#57796d; --cat-1:#9b7433; --cat-2:#397998; --cat-3:#7f6d92; --cat-4:#a26359; --cat-5:#697487;
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s6:24px; --s8:32px;
  --radius:8px; --shadow:0 4px 16px #00000012;
  --sans:Arial,"Yu Gothic UI",Meiryo,"Hiragino Kaku Gothic ProN",sans-serif;
  --map-height:clamp(540px,calc(100vh - 305px),780px);
  font:14px/1.6 var(--sans); color:var(--text); background:var(--page);
}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit;color:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.38}a{color:inherit;text-underline-offset:3px}button:focus-visible,a:focus-visible,input:focus-visible,svg:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--focus);outline-offset:3px}button{border-radius:var(--radius)}[hidden]{display:none!important}h1,h2,h3,p{margin:0}svg{display:block}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:30;left:16px;top:8px;padding:12px 16px;background:var(--panel);transform:translateY(-160%)}.skip-link:focus{transform:none}
.site-header,main,.site-footer{max-width:1680px;margin:0 auto;padding-left:var(--s8);padding-right:var(--s8)}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:20px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:32px;color:var(--strong);flex-shrink:0}.brand-mark svg{width:30px;height:30px}h1{font-size:22px;line-height:1.4;letter-spacing:-.03em;font-weight:750}.brand-description{font-size:12px;color:var(--muted);margin-top:4px}.header-info{display:grid;grid-template-columns:auto auto;column-gap:24px;align-items:center}.collection-stats{font-size:12px}.collection-stats strong{font-size:16px;font-weight:700;font-variant-numeric:tabular-nums}.collection-stats .stats-separator{margin:0 8px;color:#aaa}.collection-period{font-size:11px;color:var(--muted);grid-row:2;grid-column:1}.quiet-link{font-size:12px;display:inline-flex;align-items:center;gap:12px;min-height:44px;grid-column:2;grid-row:1/3;text-decoration:none}.quiet-link:hover{text-decoration:underline}
.explore-tools{position:relative;padding-top:20px;padding-bottom:12px;z-index:5}.search-row{display:flex;align-items:center;gap:24px}.search-field{position:relative;width:min(100%,560px)}.search-field>label{display:block;font-size:12px;font-weight:700;margin-bottom:8px}.search-box{display:flex;align-items:center;border:2px solid transparent;border-radius:var(--radius);height:48px;background:var(--surface)}.search-box:focus-within{border-color:var(--strong);background:var(--panel)}.search-icon{width:20px;height:20px;flex-shrink:0;margin-left:12px;color:var(--strong)}.search-icon svg{width:100%;height:100%}#race-search{width:100%;border:0;background:none;min-width:0;padding:10px 12px;outline:none;line-height:1.5;font-size:16px}#race-search:focus-visible{outline:none}#race-search::placeholder{color:var(--muted)}.search-box:has(input:focus-visible){outline:3px solid var(--focus);outline-offset:3px}.search-hint{font-size:12px;color:var(--muted);padding-top:24px}
.icon-button{display:inline-grid;place-items:center;min-width:44px;min-height:44px;border:0;background:var(--panel);font-size:22px;line-height:1;flex-shrink:0}.icon-button:hover{background:var(--surface-hover)}.clear-search{border:0;background:none;margin-right:0;font-size:24px}.search-popup{position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);z-index:20;overflow:hidden}.search-results-heading{padding:10px 16px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;font-size:11px;color:var(--muted)}#search-results{list-style:none;margin:0;padding:0;max-height:320px;overflow-y:auto;overscroll-behavior:contain}#search-results li{position:relative;min-height:64px;padding:10px 40px 10px 16px;border-bottom:1px solid var(--line);cursor:pointer}#search-results li.is-active,#search-results li:hover{background:var(--surface)}.candidate-race{display:block;font-size:14px;font-weight:600}.candidate-place{font-size:12px;color:var(--muted)}.candidate-selected{position:absolute;right:16px;top:20px;color:var(--accent)}.search-empty{padding:24px 16px;font-size:13px;color:var(--muted)}
.filter-heading{display:inline-flex;align-items:center;gap:16px;font-size:12px;font-weight:600;margin-top:8px;margin-right:12px}.filter-actions{display:flex;align-items:center;gap:4px}.text-button{border:0;background:none;padding:4px 10px;min-height:44px;min-width:44px;font-size:12px;text-decoration:underline;text-underline-offset:3px}.text-button:hover{background:var(--surface)}.filter-toggle{display:none}.category-filters{display:inline-flex;gap:4px 16px;flex-wrap:wrap;vertical-align:middle}.category-button{min-height:44px;display:flex;align-items:center;gap:6px;border:0;background:transparent;padding:6px 0;font-size:12px;border-radius:0}.category-button:hover{background:var(--surface)}.category-button[aria-pressed=false]{color:var(--muted)}.filter-check{width:16px;height:16px;display:grid;place-items:center;border:2px solid var(--strong);background:var(--strong);color:#fff;font:bold 11px/1 Arial;border-radius:3px;flex-shrink:0}.category-button[aria-pressed=false] .filter-check{background:var(--panel);color:transparent;border-color:#777}.category-count{font-size:11px;font-variant-numeric:tabular-nums;color:var(--muted);margin-left:2px}.category-glyph{width:14px;height:14px;display:inline-flex;flex-shrink:0;align-items:center;justify-content:center}.category-glyph svg{width:14px;height:14px;overflow:visible}
.explore-layout{display:grid;grid-template-columns:minmax(0,1fr) 352px;gap:24px;align-items:start;border-top:1px solid var(--line)}.map-panel{min-width:0;background:var(--panel)}.map-panel-heading{min-height:48px;display:flex;justify-content:space-between;align-items:center;gap:12px}.map-panel-heading h2{font-size:14px;font-weight:700}.visible-count{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;text-align:right}.visible-count strong{color:var(--text);font-weight:600}.map-stage{position:relative;height:var(--map-height);background:var(--ocean);overflow:hidden;border:1px solid #dbe4e6}#japan-map{display:block;width:100%;height:100%;touch-action:none;cursor:grab}#japan-map:active{cursor:grabbing}.land{fill:var(--land);stroke:var(--land-edge);stroke-width:.65;vector-effect:non-scaling-stroke}.point{stroke:var(--panel);stroke-width:.8;vector-effect:non-scaling-stroke}.selected-ring{fill:none;stroke:var(--accent);stroke-width:2.4;vector-effect:non-scaling-stroke}.selected-halo{fill:var(--panel);fill-opacity:.95;stroke:none}.prefecture-label{fill:#44584f;font:11px var(--sans);paint-order:stroke;stroke:var(--ocean);stroke-width:3px;stroke-linejoin:round;pointer-events:none}.selection-label{font:700 13px var(--sans);fill:var(--accent-dark);paint-order:stroke;stroke:var(--panel);stroke-width:4px;stroke-linejoin:round;pointer-events:none}.map-controls{position:absolute;top:16px;right:16px;display:grid;border:1px solid #cbd4d6;border-radius:8px;overflow:hidden;box-shadow:0 2px 8px #0000000a}.map-controls .icon-button{border-radius:0;border-bottom:1px solid var(--line)}.map-controls .icon-button:last-child{border:0}.reset-map{font-size:12px}.touch-mode{display:none}.map-caption{display:flex;align-items:flex-start;gap:8px;padding:12px 0;font-size:11px;color:var(--muted);line-height:1.6}.map-caption p{flex:1}.map-caption strong{font-weight:600}.info-symbol{width:15px;height:15px;display:inline-grid;place-items:center;border:1px solid var(--muted);border-radius:50%;font:11px Arial;margin-top:2px;flex-shrink:0}.map-gesture{font-size:10px;max-width:150px;text-align:right}.map-empty{position:absolute;left:50%;top:45%;transform:translate(-50%,-50%);width:min(320px,calc(100% - 32px));text-align:center;background:var(--panel);padding:24px;border-radius:var(--radius);border:1px solid var(--line)}.map-empty strong{font-size:15px}.map-empty p{font-size:12px;color:var(--muted);margin:12px 0 16px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 16px;border:0;border-radius:var(--radius);background:var(--surface);text-decoration:none;font-size:13px;font-weight:600}.button:hover{background:var(--surface-hover)}.button-primary{background:var(--strong);color:#fff}.button-primary:hover{background:#383838}
.place-picker{position:absolute;left:16px;bottom:16px;width:min(310px,calc(100% - 32px));background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:8px 12px 12px}.picker-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.picker-heading h3{font-size:13px}.picker-heading .icon-button{font-size:22px}.picker-options{display:grid;max-height:220px;overflow:auto}.picker-option{min-height:48px;background:var(--panel);border:0;border-bottom:1px solid var(--line);border-radius:0;text-align:left;padding:8px;display:flex;align-items:center;justify-content:space-between;gap:12px}.picker-option:hover{background:var(--surface)}.picker-option strong{font-size:13px;font-weight:600}.picker-option small{font-size:11px;color:var(--muted)}.map-hover{position:absolute;max-width:230px;pointer-events:none;background:var(--strong);color:#fff;border-radius:6px;padding:8px 12px;font-size:12px}
.results-panel{min-width:0;border-left:1px solid var(--line);padding-left:24px}.panel-tabs{display:flex;gap:24px;border-bottom:1px solid var(--line);height:48px}.panel-tabs>button{position:relative;background:none;border:0;border-radius:0;padding:0 0 12px;align-self:stretch;font-size:14px;color:var(--muted);font-weight:600;min-height:44px;min-width:44px;display:flex;align-items:center;gap:8px;padding-top:8px}.panel-tabs>button[aria-selected=true]{color:var(--strong)}.panel-tabs>button[aria-selected=true]:after{position:absolute;content:"";height:3px;bottom:-1px;left:0;right:0;background:var(--strong)}#list-count{font-size:11px;font-weight:400;background:var(--surface);padding:0 6px;border-radius:4px;line-height:20px}.list-column-heading{display:flex;justify-content:space-between;padding:12px 8px;font-size:11px;color:var(--muted);border-bottom:1px solid var(--line)}.race-list{height:calc(var(--map-height) - 36px);overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin}.race-row{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;min-height:68px;padding:10px 8px;border:0;border-bottom:1px solid var(--line);border-radius:0;background:var(--panel);text-align:left;position:relative}.race-row:hover{background:var(--surface)}.race-row[aria-current=true]{background:var(--accent-soft)}.race-row[aria-current=true]:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent)}.race-row-name{font-weight:600;font-size:13px;display:block;overflow-wrap:anywhere}.race-row-place{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);margin-top:2px}.race-row-prefecture{font-size:11px;color:var(--muted);flex-shrink:0;text-align:right}.race-row-prefecture small{display:block;color:var(--accent);font-size:10px;margin-top:4px}.list-footnote{font-size:10px;color:var(--muted);padding:12px 0;border-top:1px solid var(--line)}.list-empty{padding:24px 8px;color:var(--muted);font-size:13px}
.detail-panel{min-width:0;height:calc(var(--map-height) + 44px);overflow-y:auto;scrollbar-width:thin}.detail-toggle{display:none}.detail-body{padding:20px 8px 24px 0;overflow-wrap:anywhere}.detail-race{font-size:22px;line-height:1.5;font-weight:700;letter-spacing:-.02em;margin-bottom:20px}.detail-place-label{font-size:11px;color:var(--muted);margin-bottom:4px}.detail-place{font-size:22px;line-height:1.5;font-weight:600}.detail-prefecture{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);margin-top:4px}.pin-dot{color:var(--accent);font-size:10px}.detail-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:12px 0 20px}.category-tag{display:flex;align-items:center;gap:6px;font-size:11px;background:var(--surface);padding:4px 8px;border-radius:4px}.year-label{color:var(--muted);font-size:11px}.detail-section{border-top:1px solid var(--line);padding-top:16px;margin-top:16px}.detail-section h3{font-size:12px;font-weight:600;margin-bottom:8px}.coord-title{font-size:14px}.coordinates{font-size:11px;color:var(--muted);margin-top:4px;font-variant-numeric:tabular-nums}.representative-note{font-size:11px;color:var(--muted);margin-top:8px;line-height:1.8}.existing-note{font-size:12px;line-height:1.85;margin-top:12px;padding-left:12px;border-left:2px solid #aaa}.related-heading{display:flex;align-items:center;justify-content:space-between;gap:8px}.related-heading span{font-size:10px;color:var(--muted);font-weight:400}.related-list{list-style:none;padding:0;margin:0}.related-button{width:100%;min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 8px;text-align:left;border:0;border-radius:0;background:none;font-size:12px}.related-button:hover{background:var(--surface)}.related-button[aria-current=true]{background:var(--accent-soft);color:var(--accent-dark);font-weight:600;border-left:3px solid var(--accent)}.related-button small{flex-shrink:0;font-size:10px;font-weight:400}.related-more{font-size:11px;color:var(--muted);margin-top:8px}.source-intro{font-size:11px;color:var(--muted);margin:16px 0 12px}.source-links{display:grid;gap:8px}.source-links .button{justify-content:space-between}.source-links .coordinate-link{font-size:12px;display:flex;align-items:center;justify-content:space-between;min-height:44px;padding:4px 8px}.detail-placeholder{min-height:260px;display:flex;flex-direction:column;justify-content:center;color:var(--muted)}.detail-placeholder h2{font-size:16px;color:var(--text);margin-bottom:12px}.detail-placeholder p{font-size:12px;line-height:1.9}.load-error{padding:24px;background:var(--panel);border:1px solid var(--line);margin-top:24px}.load-error h2{font-size:18px}.load-error p{margin:12px 0}
.site-footer{margin-top:16px;padding-bottom:24px;color:var(--muted);font-size:10px}.site-footer>div{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:12px;border-top:1px solid var(--line);margin-bottom:8px}.footer-title{font-size:12px;font-weight:600;color:var(--text)}.site-footer nav{display:flex;flex-wrap:wrap;gap:16px}.site-footer nav a{display:inline-flex;gap:8px;align-items:center;min-height:44px;font-size:11px;text-decoration:none}.site-footer nav a:hover{text-decoration:underline}.site-footer nav span{font-size:10px;color:var(--muted)}.map-credit{margin-bottom:4px}
@media(max-width:1150px){.search-hint{display:none}.filter-heading{display:flex;justify-content:space-between}.category-filters{display:flex;gap:0 16px}.explore-layout{grid-template-columns:minmax(0,1fr) 310px;gap:16px}.results-panel{padding-left:16px}.map-gesture{display:none}}
@media(max-width:760px){
  :root{--map-height:440px}
  .site-header,main,.site-footer{padding-left:16px;padding-right:16px}.site-header{padding-top:16px;padding-bottom:12px;gap:12px;flex-wrap:wrap}.brand{gap:10px}.brand-mark{width:26px}.brand-mark svg{width:26px;height:26px}h1{font-size:20px}.brand-description{font-size:11px;margin-top:2px}.header-info{display:flex;gap:12px;width:100%;justify-content:space-between;flex-wrap:wrap}.collection-stats{font-size:11px}.collection-stats strong{font-size:13px}.collection-stats .stats-separator{margin:0 6px}.collection-period{font-size:10px}.collection-period span{display:none}.quiet-link{display:none}.explore-tools{padding-top:12px;padding-bottom:4px}.search-field{width:100%}.search-field>label{font-size:11px;margin-bottom:6px}.filter-heading{margin:4px 0 0;gap:8px;min-height:44px}.filter-heading>#filter-label{display:none}.filter-toggle{display:inline-flex;align-items:center;gap:8px;min-height:44px;background:none;border:0;padding:4px 0;font-size:12px;font-weight:600}.filter-toggle span{font-weight:400;font-size:11px;color:var(--muted)}.filter-actions{gap:0}.text-button{padding:4px 8px}.category-filters{display:none;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 12px;padding-bottom:8px}.filters-expanded .category-filters{display:grid}.category-button{gap:6px;font-size:11px}.category-count{margin-left:auto}.search-results-heading span:last-child{display:none}.explore-layout{display:block}.map-panel-heading{min-height:44px}.map-panel-heading h2{font-size:13px}.visible-count{font-size:11px}#japan-map{touch-action:pan-y;cursor:default}.map-stage.is-interacting #japan-map{touch-action:none}.map-controls{top:12px;right:12px}.touch-mode{display:block;position:absolute;bottom:12px;left:12px;min-height:44px;padding:8px 12px;border:0;background:var(--panel);font-size:12px;box-shadow:0 1px 6px #00000012}.touch-mode[aria-pressed=true]{background:var(--strong);color:#fff}.map-caption{padding:10px 0;font-size:10px}.place-picker{bottom:64px;left:12px;width:calc(100% - 24px)}.picker-options{max-height:190px}.results-panel{padding-left:0;border-left:0;border-top:1px solid var(--line);margin-top:8px}.panel-tabs{height:48px}.race-list{height:320px}.race-row{min-height:68px}.detail-panel{height:auto;overflow:visible}.detail-toggle{display:flex;align-items:center;gap:8px;justify-content:space-between;width:100%;border:0;background:var(--panel);text-align:left;padding:12px 0;min-height:64px;border-radius:0}.detail-toggle #detail-summary{font-size:13px;font-weight:600;flex:1}.detail-toggle #detail-toggle-label{font-size:10px;flex-shrink:0}.detail-chevron{font-size:20px;transform:rotate(180deg)}.is-collapsed .detail-chevron{transform:none}.detail-panel.is-collapsed .detail-body{display:none}.detail-body{padding:16px 0 24px;border-top:1px solid var(--line)}.detail-race{font-size:22px}.detail-place{font-size:22px}.detail-placeholder{min-height:180px}.site-footer{margin-top:12px;padding-bottom:20px}.site-footer>div{align-items:flex-start;flex-direction:column;gap:4px}.site-footer nav{gap:0 12px}.map-hover{display:none}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}