/* 20261112ui-tb PREVIEW ONLY: Textbook mode (Educational tools → one centre chapter for the open tour). Jon t649u.
   AI-written by Grok Bot (TOneWorld UI seat) 2026-11-12 America/Toronto. Behaviour: src/textbook.js.
   Body text is a book serif from the visitor's own system fonts (nothing downloaded); headings use the site's self-hosted
   Montserrat 600 in sentence case. Desktop map labels stay ALL CAPS; nothing here touches them. */

/* ---- entry in Educational tools ---- */
.tb-entry-row{margin:10px 0 2px}
.tb-open{display:flex;align-items:center;gap:10px;width:100%;font:inherit;color:inherit;background:rgba(255,255,255,.06);
  border:1px solid var(--line,#444);border-radius:10px;padding:8px 10px;cursor:pointer;text-align:left}
.tb-open:hover{background:rgba(255,255,255,.1)}
.tb-open:focus-visible{outline:2px solid var(--accent,#ffb547);outline-offset:2px}
.tb-open-ico{flex:0 0 auto;opacity:.95}
.tb-open-text{display:flex;flex-direction:column;gap:1px;min-width:0}
.tb-open-lab{font-weight:600;font-size:13px}
.tb-open-sub{font-size:11.5px;color:var(--muted,#9aa6c3)}
.tb-open[aria-expanded="true"]{border-color:var(--accent,#ffb547)}
body.theme-light .tb-open{background:rgba(29,38,56,.04)}
body.theme-light .tb-open:hover{background:rgba(29,38,56,.08)}

/* ---- the chapter window ---- */
.owh-textbook{
  --tb-paper:#10172a; --tb-ink:#e9edf6; --tb-soft:#c3cbdd; --tb-mute:#a9b3ca; --tb-rule:rgba(255,255,255,.12);
  --tb-accent:#ffc46b; --tb-link:#ffcf85; --tb-chip:rgba(255,196,107,.12); --tb-bar:#0c1222; --tb-fig:#0a0f1d;
  --tb-serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Charter,"Bitstream Charter","Source Serif Pro","Noto Serif",Georgia,"DejaVu Serif",serif;
  --tb-sans:"Montserrat",var(--font,system-ui),sans-serif;
  position:fixed;z-index:12;top:var(--tb-top,78px);bottom:var(--tb-bottom,150px);left:50%;transform:translateX(-50%);
  width:clamp(620px,66vw,1040px);max-width:calc(100vw - 24px);display:flex;flex-direction:column;
  background:var(--tb-paper);color:var(--tb-ink);border:1px solid var(--tb-rule);border-radius:14px;
  box-shadow:0 18px 60px rgba(0,0,0,.55),0 2px 10px rgba(0,0,0,.35);overflow:hidden}
.owh-textbook[hidden]{display:none!important}
body.theme-light .owh-textbook{
  --tb-paper:#fbf7ee; --tb-ink:#1b2231; --tb-soft:#2e3647; --tb-mute:#4a5368; --tb-rule:rgba(40,52,90,.16);
  --tb-accent:#a35a00; --tb-link:#8a4500; --tb-chip:rgba(163,90,0,.09); --tb-bar:#f1ebdc; --tb-fig:#efe8d8;
  box-shadow:0 18px 50px rgba(30,40,70,.28),0 2px 8px rgba(30,40,70,.18)}

.tb-bar{flex:0 0 auto;display:flex;align-items:center;gap:10px;padding:8px 10px 8px 16px;background:var(--tb-bar);border-bottom:1px solid var(--tb-rule);
  font-family:var(--tb-sans);font-size:13px}
.tb-bar-ico{display:inline-flex;color:var(--tb-accent)}
.tb-bar-lab{font-weight:600;letter-spacing:.01em}
.tb-bar-where{flex:1 1 auto;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--tb-soft);font-size:12.5px}
.tb-btn{font:600 12.5px var(--tb-sans);color:var(--tb-ink);background:transparent;border:1px solid var(--tb-rule);border-radius:999px;padding:6px 12px;cursor:pointer;white-space:nowrap}
.tb-btn:hover{border-color:var(--tb-accent)}
.tb-exit{border-color:var(--tb-accent);color:var(--tb-accent)}
.tb-btn-solid{background:var(--tb-accent);color:#1a1205;border-color:var(--tb-accent)}
body.theme-light .tb-btn-solid{color:#fff}
.tb-x{flex:0 0 auto;width:32px;height:32px;border-radius:50%;border:1px solid var(--tb-rule);background:transparent;color:var(--tb-ink);font-size:20px;line-height:1;cursor:pointer}
.tb-x:hover{border-color:var(--tb-accent)}
.tb-btn:focus-visible,.tb-x:focus-visible,.tb-goto:focus-visible,.owh-textbook a:focus-visible{outline:2px solid var(--tb-accent);outline-offset:2px}

.tb-scroll{flex:1 1 auto;overflow:auto;overscroll-behavior:contain;scroll-behavior:auto;outline:none;-webkit-overflow-scrolling:touch}
.tb-page{max-width:880px;margin:0 auto;padding:30px 44px 56px;font-family:var(--tb-serif);font-size:17.5px;line-height:1.62;color:var(--tb-ink);
  hyphens:auto;-webkit-hyphens:auto;font-kerning:normal;text-rendering:optimizeLegibility}
.owh-textbook a{color:var(--tb-link);text-decoration-thickness:1px;text-underline-offset:2px}

.tb-head{text-align:center;padding:6px 0 18px;border-bottom:1px solid var(--tb-rule);margin-bottom:18px}
.tb-kicker{margin:0 0 8px;font:600 12px var(--tb-sans);letter-spacing:.08em;color:var(--tb-accent)}
.tb-title{margin:0;font:600 clamp(26px,2.6vw,34px)/1.2 var(--tb-sans);letter-spacing:-.005em;text-wrap:balance}
.tb-lens{display:inline-block;margin:12px 0 0;padding:3px 12px;border-radius:999px;background:var(--tb-chip);font:600 12.5px var(--tb-sans);color:var(--tb-soft)}
.tb-about{margin:12px auto 0;max-width:56ch;font-size:15px;font-style:italic;color:var(--tb-mute)}

.tb-toc{margin:0 0 26px;padding:14px 18px 10px;border:1px solid var(--tb-rule);border-radius:10px}
.tb-toc-h{margin:0 0 6px;font:600 13px var(--tb-sans);letter-spacing:.06em;color:var(--tb-accent)}
.tb-toc ol{margin:0;padding:0 0 0 1.4em;columns:2;column-gap:28px;font-size:15px;line-height:1.5}
.tb-toc li{break-inside:avoid;margin:0 0 4px}
.tb-toc a{text-decoration:none;color:var(--tb-ink)}
.tb-toc a:hover .tb-toc-part{text-decoration:underline}
.tb-toc-when{color:var(--tb-mute);font-size:13px;white-space:nowrap}

.tb-part{clear:both;margin:34px 0 6px;padding-top:14px;border-top:2px solid var(--tb-accent);font:600 20px/1.3 var(--tb-sans);color:var(--tb-ink)}
.tb-sec{clear:both;padding:14px 0 8px;scroll-margin-top:10px;border-radius:8px;transition:background-color .6s}
.tb-sec::after{content:"";display:block;clear:both}
.tb-sec+.tb-sec{border-top:1px solid var(--tb-rule)}
.tb-flash{background:var(--tb-chip)}
.tb-meta{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 12px;margin:0 0 4px;font:600 12.5px var(--tb-sans);letter-spacing:.02em}
.tb-when{color:var(--tb-accent)}
.tb-debate{padding:1px 8px;border-radius:999px;background:var(--tb-chip);color:var(--tb-soft)}
.tb-cardno{margin-left:auto;color:var(--tb-mute);font-weight:500}
.tb-h{margin:0 0 4px;font:600 22px/1.3 var(--tb-sans);text-wrap:balance}
.tb-focus{margin:0 0 10px;font-style:italic;color:var(--tb-soft);font-size:16px}
.tb-text{margin:0 0 12px}
.tb-refs{font:600 11px var(--tb-sans);line-height:0;margin-left:2px;white-space:nowrap}
.tb-refs a{text-decoration:none;padding:0 1px}
.tb-ref-sep{color:var(--tb-mute)}
.tb-sens{display:flex;gap:8px;align-items:flex-start;margin:4px 0 12px;padding:8px 12px;border-left:3px solid #c9a46a;background:rgba(201,164,106,.12);
  border-radius:0 8px 8px 0;font:500 14px/1.45 var(--tb-sans);color:var(--tb-soft)}
body.theme-light .tb-sens{border-left-color:#8a5a22;background:rgba(138,90,34,.08)}
.tb-review{margin:6px 0 12px;padding:8px 12px;border:1px solid var(--tb-accent);border-radius:8px;font:500 14px/1.45 var(--tb-sans)}
.tb-review p{margin:4px 0 0}
.tb-route{margin:0 0 12px;font-size:15.5px;color:var(--tb-soft)}
.tb-tools{margin:2px 0 4px}
.tb-goto{font:600 12px var(--tb-sans);color:var(--tb-link);background:none;border:1px solid var(--tb-rule);border-radius:999px;padding:4px 11px;cursor:pointer}
.tb-goto::before{content:"\25CE  "}
.tb-goto:hover{border-color:var(--tb-accent)}

/* pictures: the card's own pictures, floated beside the text like a textbook plate */
.tb-figs{float:right;width:43%;margin:6px 0 12px 26px;display:flex;flex-direction:column;gap:14px}
.tb-figs[hidden]{display:none}
.tb-figs.tb-figs-note{float:none;width:auto;margin:0 0 10px}
.tb-fig{margin:0}
.tb-img{position:relative;background:var(--tb-fig);border-radius:6px;overflow:hidden;line-height:0}
.tb-img img{display:block;width:100%;height:auto;max-height:440px;object-fit:contain}
.tb-fig-2 .tb-img img{max-height:300px}
.tb-fig .aibadge{position:absolute;left:6px;top:6px;font:600 10.5px var(--tb-sans);padding:2px 6px;border-radius:5px;background:rgba(10,15,32,.82);color:#ffd27a;border:1px solid rgba(255,210,122,.45);line-height:1.3}
.tb-fig.recon .sens-flag{left:auto;right:6px}
.tb-fig figcaption{margin:6px 0 0;font:400 12.5px/1.45 var(--tb-sans);color:var(--tb-soft);hyphens:manual}
.tb-fig figcaption .ftitle{font-weight:600;color:var(--tb-ink)}
.tb-fig figcaption .credit{display:block;margin-top:2px;color:var(--tb-mute);font-size:11.5px}
.tb-fig figcaption .rmore{font:600 11.5px var(--tb-sans);color:var(--tb-link);background:none;border:0;padding:0 0 0 6px;cursor:pointer}
.tb-fig figcaption .rinfo{margin-top:6px;font-size:12px}
.tb-fig figcaption .rinfo ul{margin:4px 0 0;padding-left:1.2em}
.tb-fig .image-content-placeholder{padding:22px 12px;line-height:1.4;text-align:center;font:500 13px var(--tb-sans);color:var(--tb-soft)}
.tb-fig .image-content-placeholder button{display:block;margin:8px auto 0;font:600 12px var(--tb-sans);color:var(--tb-link);background:none;border:1px solid var(--tb-rule);border-radius:999px;padding:4px 10px;cursor:pointer}
.tb-standin{margin:0;font:italic 14px/1.45 var(--tb-serif);color:var(--tb-mute)}

.tb-notes{clear:both;margin-top:30px}
.tb-fn{margin:8px 0 0;padding-left:2.2em;font:400 13.5px/1.5 var(--tb-sans);color:var(--tb-soft)}
.tb-fn li{margin:0 0 6px;scroll-margin-top:10px;border-radius:4px;transition:background-color .6s}
.tb-fn-cards{color:var(--tb-mute);font-size:12px;white-space:nowrap}
.tb-colophon{margin:22px 0 0;padding-top:12px;border-top:1px solid var(--tb-rule);font:italic 14px/1.5 var(--tb-serif);color:var(--tb-mute)}

.tb-is-empty{bottom:auto!important;max-height:calc(100vh - var(--tb-top,78px) - 24px);width:min(560px,calc(100vw - 24px))}
.tb-empty{text-align:left;font-size:17px}
.tb-empty .tb-title{font-size:24px;margin-bottom:10px}
.tb-empty-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tb-is-empty .tb-page{padding:24px 28px 26px}

/* while the chapter is open the tour cards and info window step aside (the tour itself keeps running state) */
body.owh-textbook-on #tourbar,body.owh-textbook-on #tour-left-stack,body.owh-textbook-on #tour-info-dock,body.owh-textbook-on #panel,
body.owh-textbook-on #tour-stack-split,body.owh-textbook-on .tour-dock-ghost{visibility:hidden!important;pointer-events:none!important}

/* tucked: a slim bar above the timeline so the globe is free */
body.owh-textbook-min .owh-textbook{top:auto;height:auto;width:min(720px,calc(100vw - 24px));border-radius:999px}
body.owh-textbook-min .owh-textbook .tb-scroll{display:none}
body.owh-textbook-min .owh-textbook .tb-bar{border-bottom:0;padding:6px 8px 6px 16px}

/* 1920 and up: a little more air */
@media (min-width:1700px){
  .tb-page{font-size:19px;padding:38px 56px 64px;max-width:920px}
  .tb-figs{width:45%}
  .tb-h{font-size:24px}
  .tb-img img{max-height:520px}
}
/* short laptops */
@media (max-height:800px) and (min-width:900px){ .owh-textbook{--tb-top:72px} }

/* phones: full-width reading sheet under the phone top bar, above the timeline strip */
@media (max-width:899.98px){
  .owh-textbook{top:calc(var(--owh-m-top-h,48px) + 4px);left:0;right:0;transform:none;width:auto;max-width:none;bottom:var(--tb-bottom,0px);border-radius:14px 14px 0 0;border-left:0;border-right:0}
  .tb-bar{padding:6px 6px 6px 12px;gap:6px}
  .tb-bar-lab{font-size:12.5px}
  .tb-btn{padding:6px 10px;font-size:12px}
  .tb-page{padding:20px 18px 40px;font-size:17px;line-height:1.6;max-width:none}
  .tb-title{font-size:24px}
  .tb-toc ol{columns:1}
  .tb-figs{float:none;width:auto;margin:6px 0 12px}
  .tb-img img{max-height:60vh}
  .tb-cardno{margin-left:0}
  body.owh-textbook-min .owh-textbook{left:8px;right:8px;width:auto;border-radius:14px}
  body.owh-textbook-min .tb-bar-where{display:none}
  .tb-is-empty{left:8px;right:8px;width:auto;border-radius:14px}
}
@media (max-width:420px){ .owh-textbook:not(.tb-is-empty) .tb-bar-lab{display:none} }
@media print{ .owh-textbook{position:static;transform:none;width:auto;box-shadow:none} }
.tb-is-empty .tb-globe,.tb-is-empty .tb-exit{display:none}
/* phone-only second entry on the tour card (the ☰ menu with Educational tools is closed while a phone tour runs) */
.tb-open-card{display:none}
@media (max-width:899.98px){ body.owh-m .tb-open-card,body.owh-m-pre .tb-open-card{display:inline-flex;align-items:center;gap:5px} }
.tb-open-card svg{flex:0 0 auto}

/* 20261112ui-tb2 (Jon t652u): chapter end — reMember Assist button just above a page break before the next chapter */
.tb-page{--tb-pad:44px}
.tb-chend{clear:both;display:flex;justify-content:center;margin:24px 0 10px}
.tb-chend[hidden]{display:none}
.tb-ra{display:flex;align-items:center;gap:12px;width:100%;max-width:520px;padding:12px 16px;border:1px solid var(--tb-accent);border-radius:12px;
  background:var(--tb-chip);color:var(--tb-ink);font:600 14.5px/1.3 var(--tb-sans);cursor:pointer;text-align:left}
.tb-ra:hover:not(:disabled){filter:brightness(1.08)}
.tb-ra:focus-visible{outline:2px solid var(--tb-accent);outline-offset:3px}
.tb-ra-ico{flex:0 0 auto;display:inline-flex;color:var(--tb-accent)}
.tb-ra-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.tb-ra-sub{font-weight:500;font-size:12.5px;color:var(--tb-mute)}
.tb-ra:disabled{border-color:var(--tb-rule);background:none;cursor:default}
.tb-pagebreak{clear:both;position:relative;height:30px;margin:22px calc(-1 * var(--tb-pad)) 0;background:var(--tb-bar);
  border-top:1px solid var(--tb-rule);border-bottom:1px solid var(--tb-rule);
  box-shadow:inset 0 7px 9px -7px rgba(0,0,0,.45),inset 0 -7px 9px -7px rgba(0,0,0,.45);break-after:page;page-break-after:always}
body.theme-light .tb-pagebreak{box-shadow:inset 0 7px 9px -7px rgba(40,52,90,.25),inset 0 -7px 9px -7px rgba(40,52,90,.25)}
.tb-pagebreak::after{content:"\2766";position:absolute;left:50%;top:50%;transform:translate(-50%,-52%);color:var(--tb-accent);font-size:15px;line-height:1}
.tb-pagebreak+.tb-part{border-top:0;margin-top:22px;padding-top:4px}
.tb-ra-coach .ow-st-backdrop{background:transparent!important}
.tb-ra-coach .ow-st-card{border-radius:12px}
.tb-ra-coach .ow-st-body b{font-weight:700}
@media (min-width:1700px){ .tb-page{--tb-pad:56px} }
@media (max-width:899.98px){ .tb-page{--tb-pad:18px} .tb-ra{max-width:none} }