@charset "UTF-8";
:root{font-family:"Meiryo","メイリオ",Arial,"Hiragino Kaku Gothic ProN",sans-serif;color:#203947;background:#f6f8f9;font-size:16px;--navy:#112e40;--ink:#203947;--muted:#6c7f89;--line:#e0e7ea;--accent:#dba86b;--teal:#197d89;--shadow:0 5px 22px #102f4114}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,summary{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #d49b4a;outline-offset:3px}button{color:var(--ink)}[hidden]{display:none!important}.topbar{height:76px;background:var(--navy);color:white;display:flex;align-items:center;padding:0 30px;gap:50px;border-bottom:1px solid #294452}.brand{display:flex;gap:13px;align-items:center;white-space:nowrap}.brand svg{width:34px;height:34px}.brand>span{font-size:23px;letter-spacing:normal;font-weight:600}.brand small{display:block;font-size:10px;font-weight:400;letter-spacing:normal;color:#bfccd3;margin-top:3px}.topbar nav{display:flex;align-self:stretch;gap:30px;font-size:14px}.topbar nav a{display:flex;align-items:center;position:relative;color:#c6d3da}.topbar nav a:hover,.topbar nav a[aria-current]{color:white}.topbar nav a[aria-current]:after{content:"";height:3px;background:var(--accent);position:absolute;bottom:0;left:0;right:0}.header-note{margin-left:auto;font-size:11px;letter-spacing:normal;color:#8ca4b1}.atlas{display:grid;grid-template-columns:318px minmax(0,1fr);height:calc(100dvh - 76px)}.explorer{background:#fff;overflow:auto;border-right:1px solid var(--line);position:relative;z-index:5;padding:26px 23px 0;scrollbar-width:thin}.eyebrow{font-size:10px;letter-spacing:normal;font-weight:600;color:var(--teal);display:block}.panel-heading h1{font-size:19px;letter-spacing:normal;margin:11px 0 22px;font-weight:600}.search-form{display:flex;border:1px solid #cdd9df;border-radius:6px;height:46px;background:#f7f9fa}.search-form input{min-width:0;width:100%;border:0;background:none;padding:10px 0 10px 12px;outline:none;font-size:14px}.search-form button{border:0;background:none;width:42px;font-size:29px;padding:0}.search-results{display:grid;gap:3px;max-height:245px;overflow:auto}.search-results button{text-align:left;background:#f5f8fa;border:0;padding:12px;font-size:14px;line-height:1.6;border-radius:4px}.search-results small{display:block;color:var(--teal)}.place-heading{margin-top:29px;padding-bottom:22px;border-bottom:1px solid var(--line)}.place-heading h2{font-size:19px;font-weight:600;margin:10px 0}.coordinates{font-family:inherit;font-variant-numeric:tabular-nums;font-size:11px;color:#8797a0;letter-spacing:normal}.section-title{display:flex;align-items:center;justify-content:space-between;margin:23px 0 13px}.section-title h3{font-size:14px;margin:0}.small-tag{font-size:11px;background:#edf3f5;color:#5b7582;padding:3px 7px;border-radius:4px}.era-cards{display:grid;gap:8px}.era-card{border:1px solid #dde5e9;border-radius:5px;background:#fff;text-align:left;padding:12px 13px;display:flex;align-items:center;gap:13px;width:100%}.era-card.active{border-color:#196a79;background:#f0f7f8;box-shadow:inset 3px 0 #196a79}.era-card .era-number{font-family:inherit;font-variant-numeric:tabular-nums;font-size:26px;color:#294e60;min-width:56px}.era-card strong{display:block;font-size:13px}.era-card small{display:block;font-size:11px;color:#71828c;margin-top:4px}.era-card .era-check{margin-left:auto;color:#267e89;font-size:16px}.subtle{font-size:11px;line-height:1.8;color:#7b8c95;margin:9px 0}.muted{color:#6c808b;font-size:14px;line-height:1.8}.layer-section{border-top:1px solid var(--line);margin:22px 0 0;padding-top:17px}.layer-section summary{font-size:14px;font-weight:600;cursor:pointer}.layer-section summary span{float:right;font-size:11px;font-weight:400;color:#8c9aa2}.layer-list{display:grid;grid-template-columns:1fr 1fr;gap:12px 8px;padding:18px 0 5px}.layer-toggle{display:flex;gap:8px;align-items:center;font-size:13px}.layer-toggle input{accent-color:var(--teal);width:15px;height:15px;margin:0}.layer-toggle.unavailable{color:#9ba8ae}.layer-toggle small{font-size:9px}.source-summary{margin-top:23px;padding:20px 0;border-top:1px solid var(--line)}.source-summary h3{font-size:14px;margin:10px 0}.source-summary p{font-size:12px;line-height:1.8;color:#72838c}.source-summary a{color:var(--teal);font-size:12px}.source-name{display:block;margin:8px 0;font-size:13px;line-height:1.7;font-weight:600}.source-detail{background:#f6f8f9;border-radius:4px;padding:10px;margin-top:10px;font-size:11px;line-height:1.8;color:#657c88}.region-links{border-top:1px solid var(--line);padding:15px 0;font-size:13px}.region-links summary{cursor:pointer}.region-links>div{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}.region-links a{padding:5px 8px;background:#f0f5f6;border-radius:4px}.region-story{font-size:14px;line-height:1.8}.region-story h3{font-size:16px}.panel-footer{border-top:1px solid var(--line);padding:15px 0 20px;display:flex;flex-wrap:wrap;gap:12px;font-size:11px;color:#7d909b}.panel-footer small{display:block;width:100%;font-size:10px}.map-workspace{position:relative;overflow:hidden;background:#e8edf0}.map-canvas{position:absolute;inset:0}.map-canvas .maplibregl-canvas{outline:none}.map-toolbar{position:absolute;top:22px;left:25px;right:25px;display:flex;gap:10px;z-index:3;pointer-events:none}.map-toolbar>*{pointer-events:auto}.map-mode{padding:4px;background:#fffffff2;box-shadow:var(--shadow);border:1px solid #dfe6ea;border-radius:7px;display:flex;gap:3px}.map-mode button{background:transparent;border:0;border-radius:4px;font-size:13px;font-weight:600;padding:11px 17px;white-space:nowrap}.map-mode button.selected{background:var(--navy);color:#fff}.square-button{height:43px;width:43px;display:grid;place-items:center;background:#fff;border:1px solid #dce5e8;border-radius:5px;box-shadow:var(--shadow);font-size:23px}.square-button:hover{background:#f0f6f8}.map-toolbar #share{margin-left:auto;font-size:25px}.map-label{position:absolute;top:90px;left:28px;display:flex;gap:10px;padding:10px 13px;background:#ffffffee;box-shadow:var(--shadow);border-radius:4px;z-index:2;pointer-events:none}.map-label strong{font-size:14px;font-weight:600;display:block}.map-label small{display:block;color:#768a95;font-size:10px;margin-top:3px}.label-rule{width:3px;background:var(--accent);border-radius:2px}.modern-label{left:auto;right:28px}.map-side-controls{position:absolute;right:24px;top:160px;display:grid;gap:5px;z-index:3}.map-side-controls button:nth-child(3){margin-top:9px}.map-side-controls button:last-child{font-size:15px;font-weight:600}.map-center{position:absolute;left:50%;top:50%;width:16px;height:16px;border:1px solid #14394c77;border-radius:50%;pointer-events:none}.map-center:after{content:"";position:absolute;inset:6px;border-radius:50%;background:#234d61}.map-legend{position:absolute;bottom:148px;left:28px;display:flex;gap:13px;align-items:center;background:#ffffffed;padding:10px 13px;border-radius:5px;font-size:10px;box-shadow:var(--shadow);pointer-events:none}.map-legend strong{font-weight:600;color:#506b78;font-size:11px}.map-legend span{display:flex;align-items:center;gap:4px;color:#687e8a}.map-legend i{width:9px;height:9px;border-radius:2px;display:block}.timeline{position:absolute;bottom:33px;left:26px;right:26px;background:#fff;border:1px solid #dae3e7;box-shadow:0 7px 30px #14354b1c;min-height:98px;border-radius:8px;display:flex;align-items:center;padding:20px 24px;gap:24px;z-index:3}.timeline-current{border-right:1px solid var(--line);min-width:122px;padding-right:25px;display:grid;gap:2px}.timeline-current>span{font-size:11px;color:#7b8f99;max-width:155px}.timeline-current>strong{font-family:inherit;font-variant-numeric:tabular-nums;font-size:34px;font-weight:400;color:#284d61;line-height:1.1}.timeline-track{flex:1;min-width:80px}.timeline-heading{display:flex;justify-content:space-between;gap:15px;font-size:11px;color:#8597a2;margin-bottom:8px}.timeline-heading strong{color:#3f6273;font-size:12px}.timeline-stops{display:flex;justify-content:space-between;gap:10px}.timeline-stops button{font-size:11px;color:#8c9da6;background:transparent;border:0;padding:2px 0}.timeline-stops button.active{color:var(--teal);font-weight:700}.timeline-track input{width:100%;accent-color:var(--teal);cursor:pointer;margin:5px 0 0;height:15px}.earliest-button{font-size:12px;border:1px solid #dce5e9;background:white;border-radius:5px;padding:11px 12px;display:grid;gap:4px}.earliest-button span{color:#55818c;font-size:18px}.maplibregl-ctrl-attrib{font-size:10px!important;color:#667e8b}.maplibregl-ctrl-bottom-left{bottom:140px!important;left:23px!important}.maplibregl-ctrl-scale{font-size:10px!important;background:#ffffffa8!important;border-color:#607b88!important}.compare-control{position:absolute;inset:0;pointer-events:none;z-index:2;--split:50%}.compare-control input{position:absolute;top:calc(50% - 24px);left:0;width:100%;height:48px;appearance:none;background:none;pointer-events:auto;margin:0;opacity:.01}.compare-control input::-webkit-slider-thumb{appearance:none;width:48px;height:48px;cursor:ew-resize}.swipe-line{position:absolute;left:var(--split);height:100%;width:2px;background:#fff;box-shadow:0 0 8px #203e6266}.swipe-handle{position:absolute;left:var(--split);top:50%;transform:translate(-50%,-50%);background:var(--navy);color:#fff;border:3px solid white;border-radius:50%;width:44px;height:44px;display:grid;place-items:center;font-size:24px}.map-error{position:absolute;z-index:6;top:145px;left:28px;max-width:380px;background:#fff4e3;border:1px solid #e6c393;padding:14px 18px;font-size:13px;border-radius:6px}.zoom-hint{position:absolute;left:50%;top:45%;transform:translate(-50%,-50%);background:#ffffffeb;padding:12px 20px;border-radius:5px;font-size:13px;box-shadow:var(--shadow);max-width:80%;text-align:center}.detail-panel{position:absolute;right:22px;top:80px;width:330px;max-height:calc(100% - 230px);overflow:auto;padding:24px;background:#fff;box-shadow:var(--shadow);z-index:4;border-radius:7px;border:1px solid var(--line)}.detail-panel h2{font-size:20px;line-height:1.5;margin:15px 0}.detail-panel h3{font-size:13px;margin-top:22px}.detail-panel p{font-size:13px;line-height:1.8;color:#617985}.detail-panel a{color:var(--teal);font-size:13px}.detail-panel dl{font-size:12px}.detail-panel dt{color:#8a9aa2;margin-top:13px}.detail-panel dd{margin:3px 0 0;line-height:1.7;overflow-wrap:anywhere}.detail-panel .icon-button{position:absolute;right:10px;top:10px}.icon-button{border:0;background:none;font-size:23px;padding:5px 10px}.toast{position:absolute;bottom:145px;left:50%;transform:translateX(-50%);padding:12px 19px;background:var(--navy);color:#fff;border-radius:6px;z-index:8;font-size:13px;max-width:80%}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.mobile-only{display:none}.document-page{max-width:850px;margin:70px auto;padding:0 28px 80px;line-height:1.9}.document-page.wide{max-width:1200px}.document-page h1{font-size:42px;line-height:1.5;letter-spacing:normal;margin:18px 0 26px;font-weight:500}.document-page .lead{font-size:18px;color:#66808d;max-width:740px}.document-page section{margin:45px 0}.document-page h2{font-size:23px;font-weight:600}.document-page p,.document-page li{font-size:15px;color:#506b78}.primary-link,.primary-button{background:var(--navy);color:#fff;border:0;padding:12px 22px;border-radius:5px;display:inline-block;font-size:14px}.source-grid{display:grid;grid-template-columns:1fr 1fr;gap:23px;margin:40px 0}.source-card{padding:28px;background:#fff;border:1px solid var(--line);border-radius:7px}.source-card h2{font-size:20px}.source-card p{font-size:13px}.source-card dl{display:grid;grid-template-columns:90px 1fr;gap:9px;font-size:12px}.source-card dt{color:#8b9aa1}.source-card dd{margin:0;overflow-wrap:anywhere}.source-links{display:flex;gap:20px;margin-top:20px;font-size:13px;color:var(--teal)}.status{display:inline-block;padding:3px 8px;background:#edf1f3;font-size:11px;border-radius:4px;color:#788b95}.status.verified{color:#227b6c;background:#eaf5ef}.status.blocked{color:#aa614d;background:#fff0eb}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;font-size:13px}th,td{padding:14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}th{background:#eef3f5;white-space:nowrap}
@media(min-width:1600px){.atlas{grid-template-columns:350px 1fr}.explorer{padding:30px 28px 0}.timeline{left:36px;right:36px;bottom:38px}.map-toolbar{left:35px;right:35px}}
@media(max-width:1100px){.header-note{display:none}.topbar{gap:40px}.atlas{grid-template-columns:285px 1fr}.explorer{padding:22px 18px 0}.timeline{padding:17px;gap:16px}.timeline-current{min-width:90px;padding-right:15px}.timeline-current>strong{font-size:29px}.timeline-caption,.timeline-heading>span{display:none}.earliest-button{display:none}.map-mode button{padding:10px 12px}}
@media(max-width:760px){.topbar{height:64px;padding:0 17px;gap:15px}.brand>span{font-size:21px}.brand small{font-size:9px;letter-spacing:normal}.brand svg{width:28px;height:28px}.topbar nav{gap:16px;margin-left:auto}.topbar nav a{font-size:11px}.topbar nav a:first-child{display:none}.atlas{height:calc(100dvh - 64px);display:block}.explorer{display:none;position:absolute;left:0;top:64px;bottom:0;width:min(350px,92vw);box-shadow:15px 0 40px #152e4140}.explorer.open{display:block}.panel-heading{position:relative}.panel-heading .icon-button{position:absolute;right:0;top:-8px}.mobile-only{display:block}.map-workspace{height:100%}.map-toolbar{top:15px;left:12px;right:12px;gap:6px}.map-mode{flex:1}.map-mode button{font-size:11px;padding:9px 8px;flex:1}.square-button{width:39px;height:39px;font-size:20px}.map-toolbar #share{display:none}.map-label{left:13px;top:76px;padding:9px 11px}.map-label strong{font-size:12px}.map-label small{font-size:9px}.modern-label{left:auto;right:13px;max-width:140px}.map-side-controls{right:12px;top:148px}.timeline{left:12px;right:12px;bottom:29px;gap:13px;padding:15px 13px;min-height:89px}.timeline-current{min-width:71px;max-width:105px;padding-right:12px}.timeline-current>span{font-size:9px}.timeline-current>strong{font-size:27px}.timeline-heading strong{font-size:11px}.timeline-stops button{font-size:10px}.map-legend{bottom:130px;left:13px;gap:8px;padding:9px 10px;font-size:9px}.map-legend strong{font-size:10px}.map-legend span{gap:3px}.map-legend i{width:7px;height:7px}.detail-panel{left:12px;right:12px;top:auto;bottom:130px;width:auto;max-height:47vh;padding:20px}.maplibregl-ctrl-bottom-left{bottom:169px!important;left:11px!important}.document-page{margin:40px auto}.document-page h1{font-size:30px}.source-grid{grid-template-columns:1fr}.source-card{padding:20px}.map-error{left:12px;right:60px;top:140px}.toast{bottom:169px}.maplibregl-ctrl-attrib{max-width:100%;font-size:9px!important}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.map-workspace .map-canvas {position:absolute;inset:0;width:100%;height:100%;}

@media(max-width:760px){.square-button{width:44px;height:44px}.map-toolbar .square-button{flex:0 0 44px}.map-mode button{font-size:12px;min-height:44px}.topbar nav a{font-size:12px}.map-legend{font-size:11px}.timeline-stops button{font-size:11px;min-width:32px;min-height:30px}}