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6px}}:is(#app,#worldUI) .era-switch button[hidden]{display:none}:is(#app,#worldUI) .panel:not(.open){visibility:hidden;pointer-events:none}:is(#app,#worldUI) .panel-header{display:flex;align-items:center;min-height:48px;border-bottom:1px solid var(--stone);padding:0 8px 0 16px;gap:8px}:is(#app,#worldUI) .panel-toggle{display:flex;align-items:center;gap:12px;flex:1;min-width:0;min-height:48px;padding:0;border:0;background:transparent;text-align:left;color:var(--oxblood);font:12px var(--sans);cursor:pointer}:is(#app,#worldUI) .panel-toggle:hover{color:var(--carbon)}:is(#app,#worldUI) .panel-chevron{margin-left:auto;font-size:20px}:is(#app,#worldUI) .panel-header .panel-close{position:static;flex-shrink:0}:is(#app,#worldUI) .panel-summary{display:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--carbon);font:16px var(--serif)}:is(#app,#worldUI) .panel .panel-body{height:calc(100% - 49px);padding-top:22px}:is(#app,#worldUI) .panel.collapsed{height:auto}:is(#app,#worldUI) .panel.collapsed .panel-toggle-label{display:none}:is(#app,#worldUI) .panel.collapsed .panel-summary{display:block}:is(#app,#worldUI) .panel.collapsed .panel-chevron{transform:rotate(180deg)}:is(#app,#worldUI) .panel.collapsed .panel-header{border-bottom:0}@media (max-width:1100px){body.reader-collapsed #app :is(.study-controls,.regional-study,.world-study){bottom:150px}}