/* Existing eras stay in view; secondary conditions share one readable disclosure. */
.atlas-app .has-grouped-filters{display:flex;align-items:stretch;gap:10px;min-width:0;overflow:visible}
.atlas-app .has-grouped-filters>.era-tabs,.atlas-app .has-grouped-filters>.science-era-list{flex:1;min-width:0;grid-column:auto;grid-row:auto}
.atlas-filter-menu{position:relative;flex:none;align-self:stretch;z-index:12;color:#34465f;max-width:45%}
.atlas-filter-menu>summary{list-style:none;display:flex;align-items:center;justify-content:center;gap:8px;min-height:40px;height:100%;padding:8px 14px;border:1px solid #d4cce8;border-radius:9px;background:#fff;color:#55418a;font:600 14px/1.35 var(--sans,sans-serif);cursor:pointer;white-space:nowrap}
.atlas-filter-menu>summary::-webkit-details-marker{display:none}
.atlas-filter-menu>summary::after{content:'';width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:translateY(-2px) rotate(45deg);margin-left:3px}
.atlas-filter-menu[open]>summary{background:#f0eaff}.atlas-filter-menu[open]>summary::after{transform:translateY(2px) rotate(225deg)}
.atlas-filter-count{display:grid;place-items:center;min-width:21px;height:21px;border-radius:50%;background:#6d37d6;color:#fff;font-size:12px;font-variant-numeric:tabular-nums}
.atlas-filter-panel{position:absolute;right:0;top:calc(100% + 8px);width:min(370px,calc(100vw - 28px));max-height:calc(100dvh - 150px);overflow:auto;overscroll-behavior:contain;padding:18px;background:#fffdf8;border:1px solid #d6cbe9;border-radius:12px}
.atlas-filter-current{margin:0 0 16px;color:#514368;font-size:13px;line-height:1.65;overflow-wrap:anywhere}
.atlas-filter-fields{display:grid;gap:14px}.atlas-filter-fields>label,.atlas-filter-fields>.region-filter,.atlas-filter-fields>.science-filter{display:grid;width:100%;gap:6px;font-size:13px;color:#514368}
.atlas-filter-fields label>span,.atlas-filter-fields .science-filter>span,.atlas-filter-fields .region-filter>span{display:block!important;position:static!important;clip-path:none!important;clip:auto!important;width:auto!important;height:auto!important;overflow:visible!important;white-space:normal}
.atlas-filter-fields select,.atlas-app .atlas-filter-fields select{width:100%;height:44px;min-height:44px;font-size:14px;padding:8px 28px 8px 10px;border:1px solid #c7c0d5;border-radius:8px;background-color:#fff;color:#34465f}
.atlas-filter-actions{display:flex;justify-content:space-between;gap:12px;margin-top:18px}
.atlas-filter-actions button{min-height:44px;padding:8px 14px;font:600 13px/1.4 var(--sans,sans-serif);border-radius:8px;border:1px solid #d4cce8;color:#55418a;background:#f2edfb}
.atlas-filter-actions button:disabled{opacity:.55;cursor:default}.atlas-filter-actions button:last-child{background:#6d37d6;color:#fff;border-color:#6d37d6}
.atlas-filter-menu :is(summary,button,select):focus-visible{outline:3px solid #a36b00;outline-offset:3px}
.atlas-app .science-empty-recovery,.atlas-app .search-empty #world-reset-filters{min-height:44px;margin-top:12px;padding:9px 14px;border:1px solid #d4cce8;background:#f2edfb;color:#55418a;border-radius:8px;font-size:14px}
@media(max-width:900px){
 .atlas-app.science-enabled #explore{grid-template-rows:44px minmax(0,1fr)}
 .science-mobile-topics a{min-height:44px;font-size:13px;line-height:1.25;white-space:normal;text-wrap:balance;text-align:center;overflow:visible;text-overflow:clip;padding:5px 7px}
 .atlas-app .site-header #about-button,.atlas-app .site-header #library-nav{display:inline-flex;align-items:center;justify-content:center;flex:none;width:44px;min-width:44px;height:44px;min-height:44px;padding:0;font-size:0!important;position:relative;border:0;border-radius:8px;background:#f2edfb}
 .atlas-app .site-header #about-button>span,.atlas-app .site-header #library-nav>span{display:none!important}
 .atlas-app .site-header #about-button::before,.atlas-app .site-header #library-nav::before{display:none}
 .atlas-app .site-header #about-button::after,.atlas-app .site-header #library-nav::after{content:'';display:block;width:20px;height:20px;background:center/contain no-repeat}
 .atlas-app .site-header #about-button::after{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236d37d6' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M9.5 9a2.5 2.5 0 0 1 5 .5c0 1.7-2.5 2-2.5 3.5M12 16h.01'/%3E%3C/svg%3E")}
 .atlas-app .site-header #library-nav::after{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236d37d6' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 5c-3-2-7-2-10-1v15c3-1 7-1 10 1 3-2 7-2 10-1V4c-3-1-7-1-10 1Zm0 0v15'/%3E%3C/svg%3E")}
 .atlas-app .site-header .language-control select{height:44px;min-height:44px;width:78px;max-width:78px;font-size:12px}
 .atlas-app #world-view{grid-template-rows:44px var(--hero-height) 104px 44px minmax(0,1fr)}
 .atlas-app.map-expanded #world-view{grid-template-rows:44px 104px minmax(0,1fr)}
 .atlas-app #science-view{grid-template-rows:44px 72px 104px 44px minmax(0,1fr)}
 .atlas-app #science-view[data-expanded=true]{grid-template-rows:44px 104px 44px minmax(0,1fr)}
 .atlas-app .has-grouped-filters{gap:8px}.atlas-filter-menu{max-width:48%}.atlas-filter-menu>summary{min-height:44px;padding:8px 12px;font-size:14px}
 .atlas-app .era-tab,.atlas-app .science-era-list button{min-height:44px;height:44px;font-size:13px}
 .atlas-app .science-era-list button{padding:8px 12px}.atlas-app .workspace-tabs,.atlas-app .science-pane-tabs{height:44px}
 .atlas-app .workspace-tabs button,.atlas-app .science-pane-tabs button{min-height:44px;font-size:14px}
 .atlas-app .timeline-panel{height:104px;grid-template-rows:44px 44px;padding:6px 10px;row-gap:4px}
 .atlas-app #play-button,.atlas-app #playback-speed{height:44px;min-height:44px;font-size:14px}
 .atlas-app .timeline-panel .range-wrap{height:44px;grid-template-columns:98px minmax(0,1fr)}
 .atlas-app #timeline-mode{height:44px;width:98px;font-size:12px}.atlas-app #year-slider{height:44px;top:0}
 .atlas-app .timeline-axis{height:44px}.atlas-app .timeline-panel .range-labels{font-size:11px;bottom:0}
 .atlas-app .science-timeline{height:104px;grid-template-columns:minmax(0,1fr) auto 66px;grid-template-rows:44px 36px;gap:6px 8px;padding:8px 10px}
 .atlas-app .science-timeline .science-date{min-height:44px;font-size:14px}.atlas-app .science-play,.atlas-app .science-timeline #science-speed{min-height:44px;font-size:14px}
 .atlas-app .science-timeline #science-mode{min-height:36px;font-size:12px}.atlas-app .science-axis{min-height:36px}.atlas-app .science-axis input{height:44px;inset:0 0 auto}
 .atlas-app .science-years{font-size:11px}.atlas-app .science-list{grid-template-rows:44px 56px minmax(0,1fr)}
 .atlas-app .science-list-head{font-size:14px}.atlas-app .science-list-head span{font-size:12px}.atlas-app .science-search-wrap input{font-size:16px;min-height:44px}.atlas-app .science-search-wrap button{width:44px;min-height:44px}
 .atlas-app .exploration-tools{min-height:56px}.atlas-app #event-search{font-size:16px;min-height:44px}.atlas-app #event-search-reset{min-width:44px;min-height:44px}
 .atlas-app .story-nav button,.atlas-app .science-story-foot button{min-width:44px;min-height:44px;font-size:24px}
 .atlas-app .story-foot,.atlas-app .science-story-foot{height:54px;min-height:54px}
 .atlas-app .science-card small,.atlas-app .science-story-meta,.atlas-app .science-evidence,.atlas-app .science-reference-list{font-size:12px}
 .atlas-app .science-story-date{font-size:14px}.atlas-app .science-map-foot,.atlas-app .science-map-foot p,.atlas-app .science-map-foot strong{font-size:12px}
 .atlas-app .map-panel{--map-heading-row:48px}.atlas-app .map-workspace-heading{height:48px}
 .atlas-app .map-navigation button{min-width:44px;height:44px;font-size:12px}.atlas-app .map-navigation #map-zoom-in,.atlas-app .map-navigation #map-zoom-out{font-size:22px}
 .atlas-app .science-map-tools{display:flex;gap:6px;left:8px;right:8px;justify-content:flex-end;flex-wrap:wrap}
 .atlas-app .science-map-tools button{min-width:44px;min-height:44px;font-size:12px;padding:8px}
}
@media(max-width:600px){.atlas-app .site-header #sources-button{display:none!important}}
@media(max-width:360px){.atlas-app .site-header .brand-identity{display:none!important}.atlas-app .site-header .brand-symbol{width:28px;height:28px}.atlas-app .site-header nav{gap:4px!important}}
@media(max-width:420px){.atlas-app .map-workspace-heading h2,.atlas-app .science-map-title{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}}
@media(max-width:900px) and (max-height:700px){
 .atlas-app #science-view{grid-template-rows:44px 52px 104px 44px minmax(0,1fr);gap:4px}
 .atlas-app #science-view[data-expanded=true]{grid-template-rows:44px 104px 44px minmax(0,1fr)}
 .atlas-app .science-map-foot{padding:7px 10px;min-height:52px}
}