html.has-story-focus,html.has-story-focus body{overflow:hidden!important;overscroll-behavior:none}
html.has-story-focus{scrollbar-gutter:auto!important}
.ed-story-focus{position:fixed;inset:0;margin:0;width:100vw;max-width:none;height:100dvh;max-height:none;padding:0;border:0;border-radius:0;overflow:hidden;background:#f5f3ec;color:#233a3e;font-family:var(--ed-sans,Arial,sans-serif);box-shadow:none}
.ed-story-focus[open]{display:grid;grid-template-rows:auto minmax(0,1fr)}
.ed-story-focus *{box-sizing:border-box}
.ed-story-focus-header{display:flex;align-items:center;gap:20px;min-height:64px;padding:8px max(24px,env(safe-area-inset-right)) 8px max(24px,env(safe-area-inset-left));border-bottom:1px solid #203c4026}
.ed-story-focus-header h2{margin:0;min-width:0;font:400 21px/1.2 var(--ed-display,Georgia,serif);letter-spacing:-.02em}
.ed-story-focus button{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:8px 12px;border:1px solid #203c4030;border-radius:2px;background:transparent;color:#314b50;font:500 13px/1.2 var(--ed-sans,Arial,sans-serif);cursor:pointer;touch-action:manipulation}
.ed-story-focus button:hover:not(:disabled){background:#203c4007;border-color:#203c4060}
.ed-story-focus button:focus-visible{outline:2px solid #a75c42;outline-offset:2px}
.ed-story-focus button:disabled{opacity:.4;cursor:default}
.ed-story-focus .ed-story-focus-close{margin-left:auto;min-width:66px;border-color:transparent}
.ed-story-focus-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,1fr);align-items:center;gap:clamp(24px,5vw,64px);width:min(100%,1100px);margin:auto;max-height:100%;min-height:0;padding:32px}
.ed-story-focus-stage{display:grid;place-items:center;min-width:0;min-height:0;max-height:100%}
.ed-story-focus-copy{display:flex;flex-direction:column;min-width:0;min-height:0;max-height:100%}
.ed-story-focus-position{margin:0 0 12px;font:500 12px/1.35 var(--ed-sans);color:#66746b;letter-spacing:.02em}
.ed-story-focus-step{margin:0 0 14px;font:400 clamp(23px,2vw,29px)/1.2 var(--ed-display);letter-spacing:-.02em}
.ed-story-focus-description{margin:0;font:400 16px/1.65 var(--ed-text);color:#43594f}
.ed-story-focus-controls{display:grid;grid-template-columns:minmax(60px,1fr) minmax(60px,1fr) auto;gap:8px;margin-top:25px}
.ed-story-focus-controls [data-focus-next]{background:#203c40;border-color:#203c40;color:#f5f3ec}
.ed-story-focus .ed-story-focus-controls [data-focus-next]:hover:not(:disabled){background:#31575c;border-color:#31575c;color:#f5f3ec}
.ed-story-focus-controls [data-focus-whole]{border-color:transparent;color:#65746e}
.ed-story-focus-controls [data-focus-whole][aria-pressed=true]{text-decoration:underline;text-underline-offset:4px}
@media(orientation:portrait){
 .ed-story-focus-header{min-height:60px;padding-inline:16px;gap:10px}
 .ed-story-focus-header h2{font-size:18px}
 .ed-story-focus-layout{width:100%;height:auto;max-width:620px;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto;gap:22px;padding:18px 20px 20px;align-items:start;margin:auto}
 .ed-story-focus-stage{width:100%;height:auto}
 .ed-story-focus-copy{align-self:start;width:100%}
 .ed-story-focus-position{margin-bottom:7px}
 .ed-story-focus-step{font-size:22px;margin-bottom:10px}
 .ed-story-focus-description{font:400 14px/1.5 var(--ed-sans)}
 .ed-story-focus-controls{margin-top:17px}
}
@media(max-width:360px) and (orientation:portrait){
 .ed-story-focus-header{padding-inline:12px}
 .ed-story-focus-header h2{font-size:16px}
 .ed-story-focus-layout{padding:12px 14px 14px;gap:12px}
 .ed-story-focus-step{font-size:20px;margin-bottom:8px}
 .ed-story-focus-description{font-size:13px;line-height:1.4}
 .ed-story-focus-controls{gap:6px;margin-top:13px}
 .ed-story-focus-controls button{font-size:12px;padding-inline:8px}
}
@media(max-width:360px) and (max-height:640px) and (orientation:portrait){
 .ed-story-focus-layout{padding-block:8px;gap:8px}
}
@media(orientation:landscape) and (max-height:600px){
 .ed-story-focus-header{min-height:52px;padding:4px 14px;gap:12px}
 .ed-story-focus-header h2{font-size:17px}
 .ed-story-focus-layout{height:100%;grid-template-columns:minmax(0,1.2fr) minmax(250px,1fr);gap:20px;padding:14px 18px;align-items:center}
 .ed-story-focus-position{font-size:11px;margin-bottom:7px}
 .ed-story-focus-step{font-size:18px;margin-bottom:9px}
 .ed-story-focus-description{font:400 13px/1.4 var(--ed-sans)}
 .ed-story-focus-controls{margin-top:14px;gap:5px}
 .ed-story-focus-controls button{font-size:12px;padding-inline:6px}
}

/* Keep the complete explanation available when text is enlarged. The dialog
   header stays in place while its illustration and copy can scroll together. */
.ed-story-focus[open] .ed-story-focus-layout{height:100%;max-height:none;overflow:auto;overscroll-behavior:contain;margin:0 auto;align-content:start;align-content:safe center;align-items:start;align-items:safe center}
.ed-story-focus[open] :is(.ed-story-focus-stage,.ed-story-focus-copy){min-height:min-content;max-height:none}
.ed-story-focus[open] .ed-story-focus-controls{position:sticky;bottom:0;z-index:2;background:#f5f3ec}
.ed-story-focus[open] .ed-system-node{overflow-wrap:anywhere}
@media(orientation:portrait){
 .ed-story-focus[open] .ed-story-focus-layout{grid-template-rows:max-content max-content}
}
@media(orientation:landscape) and (max-height:360px) and (max-width:600px){
 .ed-story-focus[open] .ed-story-focus-layout{padding:4px 12px;gap:12px}
 .ed-story-focus[open] .ed-story-focus-position{margin-bottom:5px}
 .ed-story-focus[open] .ed-story-focus-step{margin-bottom:7px}
 .ed-story-focus[open] .ed-story-focus-controls{margin-top:10px}
 .ed-story-focus[open] .ed-system-diagram{padding:6px}
 .ed-story-focus[open] .ed-system-node{padding-top:3px;padding-bottom:0}
 .ed-story-focus[open] .ed-system-node::after{margin-top:3px}
 .ed-story-focus[open] .ed-system-circuits{margin-top:3px}
 .ed-story-focus[open] .ed-system-circuits span{padding-top:3px}
 .ed-story-focus[open] .ed-system-key{margin-top:5px}
}