:root{--navy:#14243c;--navy2:#203954;--ink:#1d2d42;--muted:#6c7b8c;--line:#e3e9ef;--gold:#ecad2b;--goldlight:#fff4d6;--blue:#347aaf;--bg:#f5f7fa;--white:#fff;--shadow:0 10px 35px #14243c12}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.5}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.5;cursor:default}button,input,select,textarea,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #e8ad34;outline-offset:3px}button{color:inherit}button svg{flex-shrink:0}svg.lucide{width:19px;height:19px;stroke-width:1.8}a{color:var(--blue)}[hidden]{display:none!important}.topbar{height:84px;display:flex;align-items:center;gap:20px;padding:0 24px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:900}.brand{width:173px;flex-shrink:0;height:58px;display:block}.logo-crop{width:178px;height:58px;position:relative;overflow:hidden;display:block}.logo-crop img{position:absolute;width:258px;height:258px;max-width:none;left:-42px;top:-87px}.brand-divider{height:34px;width:1px;background:var(--line)}.product-name{font-size:22px;font-weight:500;white-space:nowrap;line-height:1.15}.product-name b{font-weight:750}.product-name span{display:block;margin-top:7px;font-size:10px;letter-spacing:1.8px;font-weight:650;color:var(--muted)}.main-nav{margin-left:36px;display:flex;height:100%;gap:8px}.nav-btn{border:0;background:none;display:flex;align-items:center;gap:8px;padding:0 18px;color:var(--muted);position:relative;font-size:14px;font-weight:650;white-space:nowrap}.nav-btn.active{color:var(--navy)}.nav-btn.active:after{content:"";position:absolute;bottom:0;left:16px;right:16px;height:3px;background:var(--gold)}.nav-btn.active svg{color:#b77c09}.nav-btn 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152px);min-height:530px}.sidebar{background:#fff;display:flex;flex-direction:column;min-width:0;border-right:1px solid var(--line);overflow:hidden;z-index:800}.sidebar-head{display:flex;justify-content:space-between;align-items:center;padding:24px 22px 14px}.eyebrow{font-size:10px;letter-spacing:1.6px;font-weight:750;color:var(--muted);display:block}.sidebar h1{font-size:22px;line-height:1.3;letter-spacing:-.5px;margin:7px 0 0}.panel-content{padding:0 18px 20px;overflow:auto;flex:1;scrollbar-width:thin;scrollbar-color:#c9d3df transparent}.sidebar-footer{padding:13px 20px;border-top:1px solid var(--line);background:#fbfcfd;display:flex;flex-direction:column;gap:4px}.sidebar-footer button{border:0;background:none;display:flex;align-items:center;gap:8px;font-size:12px;padding:0;color:#506277;text-align:left}.sidebar-footer span{font-size:10px;color:#97a2af;letter-spacing:.5px}.summary-strip{display:flex;gap:7px;font-size:12px;color:var(--muted);margin:3px 4px 17px}.summary-strip 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#fff}.basemap-switch{position:absolute;top:19px;left:21px;z-index:410;display:flex;padding:4px;background:#fffffff5;box-shadow:0 2px 10px #15314b15;border:1px solid #d7e1e9;border-radius:7px;gap:2px}.basemap-switch button{padding:6px 11px;background:none;border:0;border-radius:4px;font-size:12px;font-weight:650;color:#6c7b8c}.basemap-switch button.active{background:var(--navy);color:white}.compare-style{position:absolute;top:20px;left:16px;right:62px;z-index:420;background:#fff;display:flex;gap:7px;align-items:center;padding:9px 10px;border-radius:6px;box-shadow:var(--shadow);font-size:12px}.compare-style select{width:100%;border:0;font-size:12px;background:#fff}.pane-caption{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);font-size:11px;z-index:410;background:#fffffff2;padding:6px 12px;border:1px solid var(--line);border-radius:20px;white-space:nowrap}.map-heading{position:absolute;left:25px;top:88px;z-index:400;pointer-events:none;text-shadow:0 1px 3px #fff,0 0 8px 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var(--line);overflow:auto;background:#fff;scrollbar-width:thin}.detail-top{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border-bottom:1px solid var(--line);font-size:11px;color:var(--muted);font-weight:650;letter-spacing:.5px}.detail-body{padding:23px 23px 25px}.detail-category{display:inline-flex;align-items:center;gap:7px;font-size:11px;color:#3279ab;font-weight:700;background:#edf5fb;padding:5px 9px;border-radius:4px}.detail-body h2{font-size:30px;letter-spacing:-.8px;line-height:1.2;margin:15px 0 6px}.detail-region{font-size:12px;color:var(--muted);margin-bottom:19px}.detail-coordinates{display:flex;justify-content:space-between;background:#f5f7fa;border:1px solid var(--line);border-radius:6px;padding:11px 12px;margin-bottom:24px;font-size:12px;font-variant-numeric:tabular-nums}.detail-coordinates span{color:var(--muted)}.detail-section-title{font-size:10px;font-weight:750;letter-spacing:1.2px;color:var(--muted);margin:24px 0 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4px;font-size:11px;font-weight:600;border-radius:3px}.feature-label:before{display:none}.country-label{font-size:10px;font-weight:700;letter-spacing:1.8px;color:#556b83;white-space:nowrap;pointer-events:none;text-shadow:0 1px 2px #fff,0 0 5px #fff;transform:translate(-50%,-50%);text-align:center}.country-label.big{font-size:20px;letter-spacing:6px;color:#5a738288}.state-label{font-size:10px;color:#5d6884;white-space:nowrap;text-shadow:0 0 3px #fff;text-align:center;pointer-events:none}.ocean-label{font-size:12px;letter-spacing:3px;font-style:italic;color:#5279988c;white-space:nowrap;text-align:center;transform:translate(-50%,-50%);pointer-events:none}.load-status{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;padding:18px 24px;border-radius:8px;box-shadow:var(--shadow);z-index:600;font-size:14px;display:flex;align-items:center;gap:12px}.spin{animation:spin 1s linear infinite}@keyframes 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4px}.timeline-ticks{display:flex;justify-content:space-between;font-size:10px;color:var(--muted)}.study-intro{font-size:13px;color:var(--muted);line-height:1.7;margin:2px 3px 20px}.study-card{border:1px solid var(--line);background:#fff;padding:15px;border-radius:8px;margin-bottom:11px}.study-card.active{border-color:#dcad46;background:#fffaf0}.study-card h3{font-size:15px;line-height:1.3;margin:9px 0 7px}.study-card p{font-size:12px;color:var(--muted);line-height:1.6;margin:0}.study-card>svg{color:#b88624;width:22px;height:22px}.study-card .btn{width:100%;margin-top:12px;font-size:12px;padding:7px;min-height:34px}.field-label{display:block;font-size:12px;font-weight:650;color:#586c80;margin:15px 0 7px}.form-control{border:1px solid #dce4eb;border-radius:6px;padding:10px 11px;font-size:14px;width:100%;background:#fff;color:var(--ink)}textarea.form-control{resize:vertical;min-height:100px}.practice-meta{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin:10px 0}.progress-track{height:5px;background:#e9edf2;border-radius:4px;overflow:hidden}.progress-track>span{height:100%;display:block;background:var(--gold)}.quiz-float{position:absolute;top:85px;left:50%;transform:translateX(-50%);z-index:650;background:#fff;width:min(410px,calc(100% - 120px));border:1px solid var(--line);border-top:3px solid var(--gold);border-radius:7px;padding:20px 22px;box-shadow:0 6px 24px #122b4320}.quiz-float .eyebrow{font-size:10px}.quiz-float h3{font-size:21px;line-height:1.3;margin:8px 0 10px;letter-spacing:-.3px}.quiz-float p{font-size:13px;color:var(--muted);line-height:1.6;margin:5px 0 12px}.quiz-float .btn{font-size:12px}.quiz-result{border-radius:5px;background:#edf7f1;color:#286449;padding:10px 12px;margin:12px 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#dbe4ed;border-radius:6px;font-size:12px;background:#f4f7fa;min-height:52px;display:flex;align-items:center;justify-content:center;text-align:center}.match-token{cursor:grab}.match-token.selected{border-color:var(--gold);background:var(--goldlight)}.match-target{border-style:dashed;background:#fff;cursor:pointer}.match-target.matched{background:#e8f5ed;border-color:#6b9e80;cursor:default}.match-token.matched{opacity:.4;pointer-events:none}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-bottom:17px}.stat{background:#f4f7fa;border-radius:7px;padding:13px}.stat strong{font-size:23px;display:block}.stat span{font-size:11px;color:var(--muted)}.saved-item{border:1px solid var(--line);border-radius:6px;padding:12px;margin-bottom:8px}.saved-item h3{font-size:14px;line-height:1.4;margin:0 0 3px}.saved-item p{font-size:12px;color:var(--muted);margin:4px 0 9px;overflow-wrap:anywhere}.saved-item .item-actions{display:flex;align-items:center;gap:12px}.saved-item .item-actions button{font-size:11px}.empty-state{text-align:center;padding:28px 6px;color:var(--muted);font-size:13px}.empty-state svg{width:30px;height:30px;color:#b0bdc9;margin-bottom:8px}.tab-mini{display:flex;gap:4px;background:#f1f4f7;padding:4px;border-radius:6px;margin:12px 0 16px}.tab-mini button{flex:1;padding:7px 3px;border:0;background:transparent;border-radius:4px;font-size:11px}.tab-mini button.active{background:#fff;color:var(--navy);font-weight:700;box-shadow:0 1px 4px #0001}.import-label{font-size:12px;color:var(--blue);cursor:pointer;text-decoration:underline}.timeline-era{font-size:25px;margin:10px 0}.time-note{font-size:12px;padding:12px;border:1px solid #ead8ae;background:#fff9ed;border-radius:6px;color:#8a713f;line-height:1.65}dialog{border:1px solid var(--line);border-radius:12px;padding:0;width:min(660px,calc(100% - 30px));max-height:88dvh;color:var(--ink);box-shadow:0 20px 80px #11243d3d}dialog::backdrop{background:#10233d73;backdrop-filter:blur(3px)}.dialog-heading{padding:20px 24px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;position:sticky;top:0;background:#fff;z-index:1}.dialog-heading h2{font-size:21px;margin:0;letter-spacing:-.4px}#dialog-body{padding:23px 26px;overflow-wrap:anywhere}.dialog-intro{font-size:14px;color:var(--muted);margin-top:0;line-height:1.7}.export-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.export-card{display:flex;flex-direction:column;align-items:flex-start;gap:7px;border:1px solid var(--line);border-radius:8px;padding:19px;background:#fff;text-align:left}.export-card:hover{border-color:#dab052;background:#fffbf1}.export-card svg{color:#be8b1d;margin-bottom:6px}.export-card strong{font-size:15px}.export-card span{font-size:12px;color:var(--muted);line-height:1.6}.source-entry{border-top:1px solid var(--line);padding:15px 0;font-size:13px;line-height:1.7}.source-entry strong{display:block;font-size:14px}.source-entry p{margin:5px 0;color:var(--muted)}.source-entry a{font-size:12px}.hint-list{padding-left:19px;font-size:14px}.hint-list li{padding-bottom:12px}.dialog-footer{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.toast-visible{opacity:1!important;transform:translate(-50%,0)!important}#toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,16px);z-index:3000;background:var(--navy);color:white;box-shadow:var(--shadow);padding:12px 20px;border-radius:8px;font-size:13px;max-width:calc(100% - 36px);opacity:0;pointer-events:none;transition:opacity .15s,transform .15s}.note-popup{font-size:13px;max-width:230px;line-height:1.6}.note-popup b{display:block}.note-popup small{font-size:11px;color:var(--muted)}.nojs{position:fixed;inset:160px 20px 20px;background:#fff;z-index:1000;padding:40px}.mobile-only,.mobile-menu{display:none}.skip-link{position:fixed;top:-100px;left:15px;padding:12px;background:#fff;z-index:10000}.skip-link:focus{top:10px}.draw-mode .map{cursor:crosshair!important}.practice-active .leaflet-interactive{pointer-events:none}.practice-active .country-label,.practice-active .state-label,.practice-active .ocean-label{display:none}.workspace.hide-detail{grid-template-columns:278px minmax(0,1fr)}.workspace.hide-detail>.detail-panel{display:none}.map-stage.comparing .map-heading{display:none}.map-stage.comparing .basemap-switch button{padding:6px 7px;font-size:11px}.map-stage.comparing .map-tip{display:none}.map-stage.comparing .map-legend{max-width:145px}.leaflet-tooltip{font-family:inherit}.leaflet-control-scale{margin-bottom:4px!important}.leaflet-control-scale-line{font-size:10px;background:#ffffffb0;border-color:#7e97aa;color:#546d84}.map-stage.timeline-active .map-legend,.map-stage.timeline-active .map-tip{display:none}.map-stage.quiz-active .map-tip{display:none}.minor{font-size:11px;color:var(--muted)}.inline-swatch{height:10px;width:10px;border-radius:2px;display:inline-block;margin-right:7px}.feature-note{font-size:13px;background:#f5f7fa;border-radius:6px;padding:12px;white-space:pre-wrap}.card-back{font-size:15px;line-height:1.75;margin-top:15px}.review-actions{display:flex;gap:8px}.review-actions .btn{flex:1}.list-table{width:100%;border-collapse:collapse;font-size:12px}.list-table th,.list-table td{padding:10px 8px;text-align:left;border-bottom:1px solid var(--line)}.list-table th{background:#f5f7fa;font-weight:650}.region-chip{display:inline-block;font-size:11px;padding:3px 7px;background:#edf3f7;color:#5a7185;border-radius:4px}.route-entry{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--line);font-size:12px}.mobile-detail-open{display:block!important}.note-form{display:grid;gap:10px}.note-form label{font-size:12px;font-weight:650}.map-stage .leaflet-popup-content{font-family:inherit}.leaflet-container a{color:var(--blue)}
@media(min-width:1650px){.workspace{grid-template-columns:300px minmax(0,1fr) 330px}.workspace.hide-detail{grid-template-columns:300px minmax(0,1fr)}.layer-row span{font-size:14px}.group summary{font-size:13px}.detail-body{padding:27px}.main-nav{margin-left:65px}}
@media(max-width:1250px){.topbar{padding:0 17px;gap:14px}.brand{width:156px}.logo-crop{transform:scale(.89);transform-origin:left center}.product-name{font-size:20px}.main-nav{margin-left:9px;gap:0}.nav-btn{padding:0 12px}.workspace{grid-template-columns:254px minmax(0,1fr) 272px}.workspace.hide-detail{grid-template-columns:254px minmax(0,1fr)}.workbar{padding:0 18px;gap:14px}.search-wrap{width:310px}.compare-btn span{display:none}.detail-body{padding:20px}.detail-body h2{font-size:27px}.map-tip{display:none}.preset-select select{max-width:165px}.map-legend{bottom:28px}.basemap-switch{left:15px}.map-heading{left:18px}.sidebar-head{padding-left:21px}.layer-row span{font-size:12px}.map-tools{right:11px}.map-tools button{width:30px;height:32px}}
@media(max-width:1040px){.workspace{grid-template-columns:245px minmax(0,1fr)}.detail-panel{display:none;position:absolute;top:152px;right:0;bottom:0;width:302px;z-index:780;box-shadow:-8px 0 25px #18354d1a}.detail-panel.mobile-detail-open{display:block}.main-nav .nav-btn{padding:0 10px}.main-nav .nav-btn svg{display:none}.header-actions{gap:5px}.brand-divider{display:none}.workbar{gap:10px}.search-wrap{width:280px}.region-switch button{padding:6px 9px}.preset-select>svg{display:none}.map-tip{display:flex}.mobile-only{display:inline-flex}.workspace.hide-detail{grid-template-columns:245px minmax(0,1fr)}}
@media(max-width:760px){.topbar{height:72px;padding:0 14px;gap:10px;flex-wrap:nowrap}.brand{width:128px;height:49px}.logo-crop{transform:scale(.74);height:68px;transform-origin:left top}.product-name{font-size:18px}.product-name span{font-size:8px;letter-spacing:1px}.main-nav{position:fixed;bottom:0;left:0;right:0;height:62px;z-index:1200;background:#fff;border-top:1px solid var(--line);margin:0;justify-content:space-around;padding-bottom:env(safe-area-inset-bottom)}.main-nav .nav-btn{flex:1;display:flex;flex-direction:column;gap:3px;justify-content:center;padding:5px;font-size:11px}.main-nav .nav-btn svg{display:block;width:18px;height:18px}.nav-btn.active:after{top:0;bottom:auto;height:2px;left:18px;right:18px}.nav-btn small{position:absolute;top:8px;right:12px;font-size:9px;min-width:16px}.header-actions .quiet{display:none}.header-actions .btn{padding:9px;min-height:35px}.header-actions .btn span{display:none}.workbar{height:111px;padding:9px 12px;flex-wrap:wrap;gap:7px}.mobile-menu{display:inline-flex;padding:8px;min-height:37px;order:0}.search-wrap{width:calc(100% - 50px);flex:1;order:1}.search-wrap input{font-size:14px;padding:9px 0}.search-wrap kbd{display:none}.region-switch{order:2;flex-shrink:0;padding:3px}.region-switch button{font-size:12px;padding:6px 9px}.preset-select{order:3;flex:1;min-width:100px;margin-left:3px}.preset-select select{font-size:12px;width:100%;max-width:180px;padding:7px 0}.compare-btn{order:4;padding:8px;min-height:34px}.compare-btn svg{width:16px;height:16px}.workspace,.workspace.hide-detail{display:block;height:calc(100dvh - 245px);min-height:340px}.map-workspace{height:100%}.sidebar{position:fixed;left:0;top:72px;bottom:62px;width:min(320px,87vw);z-index:1600;transform:translateX(-102%);transition:transform .2s;box-shadow:8px 0 35px #152b3b20}.sidebar.open{transform:translateX(0)}.sidebar-head{padding-top:24px}.layer-row span{font-size:14px}.group summary{font-size:13px}.layer-row{min-height:40px}.mobile-only{display:inline-flex}.mobile-shade{position:fixed;inset:0;background:#152b3b55;z-index:1500}.detail-panel{position:fixed;top:auto;bottom:62px;left:0;right:0;width:100%;max-height:64dvh;border-radius:16px 16px 0 0;z-index:1300;box-shadow:0 -8px 40px #152b3b30}.detail-body{padding:18px 23px 26px}.detail-top{padding:12px 20px;position:sticky;top:0;background:#fff;z-index:2}.detail-body h2{font-size:26px;margin-top:12px}.detail-category{font-size:12px}.detail-body .fact-list li{font-size:15px}.detail-body .source-note{font-size:11px}.map-heading{top:72px;left:15px}.map-heading .eyebrow{font-size:9px;letter-spacing:1px}.map-heading>div{font-size:10px}.map-tools{top:13px;right:10px;padding:3px;gap:0}.map-tools button{width:31px;height:32px}.map-tools button[data-tool=grid],.map-tools button[data-tool=fullscreen]{display:none}.basemap-switch{left:12px;top:14px;gap:0;padding:3px}.basemap-switch button{padding:6px 9px;font-size:11px}.map-legend{left:12px;bottom:29px;padding:9px 11px;max-width:166px}.legend-item{font-size:10px;margin:3px 0}.legend-title{font-size:9px;margin-bottom:5px}.legend-note{display:none}.map-tip{display:none}.map-status{gap:8px;font-size:9px;padding:5px 9px;min-height:26px}.map-status button{font-size:9px}.map-status #visible-count{display:none}.map-pane .leaflet-control-attribution{font-size:8px;max-width:95%;line-height:1.5}.map-stage.comparing .basemap-switch{left:6px;right:5px;flex-wrap:wrap;max-width:180px}.map-stage.comparing .basemap-switch button{font-size:9px;padding:5px}.map-stage.comparing .map-legend{display:none}.map-stage.comparing .pane-caption{font-size:9px;max-width:90%;padding:4px 6px;bottom:30px}.compare-style{left:7px;right:50px;top:14px;padding:5px}.compare-style svg{display:none}.compare-style select{font-size:10px;padding:4px 0}.quiz-float{top:71px;left:12px;transform:none;width:calc(100% - 70px);padding:14px 16px;max-height:calc(100% - 90px);overflow:auto}.quiz-float h3{font-size:18px}.quiz-float p{font-size:12px}.quiz-float .eyebrow{font-size:9px}.quiz-options{gap:5px}.quiz-option{font-size:12px;padding:8px 10px;min-height:36px}.drawing-instruction{bottom:28px;padding:10px;gap:8px;flex-wrap:wrap;font-size:11px;width:calc(100% - 70px);left:12px;transform:none;justify-content:space-between}.drawing-instruction strong{font-size:12px}.timeline-bar{left:12px;right:56px;bottom:30px;padding:12px}.timeline-bar .eyebrow{font-size:9px}.timeline-bar strong{font-size:15px}.timeline-ticks{font-size:8px}.timeline-ticks span:nth-child(even){display:none}.timeline-bar>div:first-child{gap:7px}.dialog-heading{padding:15px 18px}.dialog-heading h2{font-size:19px}#dialog-body{padding:18px}.export-grid{gap:8px}.export-card{padding:14px}.export-card strong{font-size:13px}.export-card span{font-size:11px}#toast{bottom:77px;width:max-content;text-align:center;font-size:12px}.match-grid{gap:6px}.match-token,.match-target{font-size:11px;padding:8px 6px;min-height:45px}.load-status{font-size:12px;width:max-content;max-width:90%;padding:15px 20px}.nojs{inset:185px 10px 70px;padding:20px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* Readable control text at normal and enlarged browser font settings. */
.layer-row span{font-size:14px}.group summary{font-size:13px}.layer-quick button{display:flex;align-items:center;justify-content:center;gap:5px}.layer-quick svg{width:15px;height:15px}.fact-list li{font-size:15px}.study-card p,.study-intro{font-size:14px}.study-card .btn{font-size:13px}.country-label,.state-label,.ocean-label{overflow:visible}
@media(max-width:1250px) and (min-width:1041px){.layer-row span{font-size:13px}.panel-content{padding-left:14px;padding-right:14px}}