/* GTO Lab Next — one column, one accent, flat surfaces. Theme follows the system until the reader picks one; dark first. */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600&family=Noto+Sans+SC:wght@400;500;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  color-scheme:dark;
  --bg:#0f0f10; --surface:#19191c; --surface-2:#222226; --line:#2b2b31;
  --fg:#f4f4f5; --muted:#a1a1aa; --faint:#6f6f78;
  --accent:#a6f4b4; --accent-ink:#0f0f10; --accent-soft:rgba(166,244,180,.10);
  --ok:#6ed68a; --no:#f07167; --ok-soft:rgba(110,214,138,.10); --no-soft:rgba(240,113,103,.10);
  /* four-color deck: spades stay light on dark, hearts red, diamonds blue, clubs green */
  --suit-s:#e4e4e7; --suit-h:#ff6b6b; --suit-d:#5b9dff; --suit-c:#4cc76a;
  /* range chart actions (raise red, call green, fold blue, as in solver UIs); rest = hands outside the range */
  --act-raise:#e05a4f; --act-allin:#a8324a; --act-call:#3fae5c; --act-check:#2f9e8f; --act-fold:#4a78c9;
  --act-bluff:#9b6bd6; --act-value:#d9a441; --act-mix:#8a8a94; --act-rest:#26262b; --act-rest-ink:#6f6f78;
  /* bet sizes: red ramp for bets up to pot (bigger = darker), purple ramp for overbets and jams (jam darkest) */
  --act-red-1:#f08a7e; --act-red-2:#e8665a; --act-red-3:#d9453a; --act-red-4:#b22d27;
  --act-purple-1:#b48ef0; --act-purple-2:#9a6ce3; --act-purple-3:#7f4fcc; --act-purple-4:#5f33a8;
  /* default series colours for data charts */
  --act-chart-1:#6ed68a; --act-chart-2:#5b9dff; --act-chart-3:#e0a53c; --act-chart-4:#b48ef0; --act-chart-5:#f07167; --act-chart-6:#3cc6c0;
  --sans:'Poppins','Noto Sans SC','Microsoft YaHei',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,Consolas,monospace;
  --font-body:17px; --leading-body:1.9; --font-h1:34px; --font-h2:22px; --font-h3:18px;
  --font-small:13px; --font-caption:12px; --measure:680px; --nav-width:240px;
  --space-1:4px; --space-2:8px; --space-3:12px; --space-4:16px;
  --space-6:24px; --space-8:32px; --space-12:48px; --radius-frame:8px;
}
/* Light palette: used when the system is light and the reader has not picked dark, or when the reader picked light.
   index.html sets data-theme before first paint from the saved choice; no choice means "follow the system". */
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]){
  color-scheme:light;
  --bg:#f6f6f4; --surface:#ffffff; --surface-2:#f0f0ec; --line:#e3e3de;
  --fg:#18181b; --muted:#5f5f68; --faint:#8b8b94;
  --accent:#1f8f4e; --accent-ink:#ffffff; --accent-soft:rgba(31,143,78,.08);
  --ok:#1f8f4e; --no:#c2412d; --ok-soft:#ecf6ef; --no-soft:#fbecea;
  --suit-s:#18181b; --suit-h:#d7263d; --suit-d:#1b5fd1; --suit-c:#16893a;
  --act-raise:#e0533f; --act-allin:#b02a44; --act-call:#2e9d51; --act-check:#1f8a7c; --act-fold:#3b6fc4;
  --act-bluff:#8455c7; --act-value:#c9902a; --act-mix:#7b7b85; --act-rest:#ecece7; --act-rest-ink:#9a9aa2;
  --act-red-1:#f19a8f; --act-red-2:#e66a5d; --act-red-3:#d1402f; --act-red-4:#a32a1f;
  --act-purple-1:#b996f2; --act-purple-2:#9b6fe0; --act-purple-3:#7a4ac6; --act-purple-4:#56299b;
  --act-chart-1:#1f8f4e; --act-chart-2:#1b5fd1; --act-chart-3:#b7791f; --act-chart-4:#7a4ac6; --act-chart-5:#c2412d; --act-chart-6:#13827d;
}}
:root[data-theme="light"]{
  color-scheme:light;
  --bg:#f6f6f4; --surface:#ffffff; --surface-2:#f0f0ec; --line:#e3e3de;
  --fg:#18181b; --muted:#5f5f68; --faint:#8b8b94;
  --accent:#1f8f4e; --accent-ink:#ffffff; --accent-soft:rgba(31,143,78,.08);
  --ok:#1f8f4e; --no:#c2412d; --ok-soft:#ecf6ef; --no-soft:#fbecea;
  --suit-s:#18181b; --suit-h:#d7263d; --suit-d:#1b5fd1; --suit-c:#16893a;
  --act-raise:#e0533f; --act-allin:#b02a44; --act-call:#2e9d51; --act-check:#1f8a7c; --act-fold:#3b6fc4;
  --act-bluff:#8455c7; --act-value:#c9902a; --act-mix:#7b7b85; --act-rest:#ecece7; --act-rest-ink:#9a9aa2;
  --act-red-1:#f19a8f; --act-red-2:#e66a5d; --act-red-3:#d1402f; --act-red-4:#a32a1f;
  --act-purple-1:#b996f2; --act-purple-2:#9b6fe0; --act-purple-3:#7a4ac6; --act-purple-4:#56299b;
  --act-chart-1:#1f8f4e; --act-chart-2:#1b5fd1; --act-chart-3:#b7791f; --act-chart-4:#7a4ac6; --act-chart-5:#c2412d; --act-chart-6:#13827d;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.75 var(--sans);font-variant-numeric:tabular-nums}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
button:disabled{cursor:default}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
h1,h2,p{margin:0}
kbd{font:500 11px var(--mono);color:var(--faint);border:1px solid var(--line);border-radius:3px;padding:0 5px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.dim{color:var(--faint)}.small{font-size:12.5px}.nowrap{white-space:nowrap}

/* Bar */
.bar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:32px;height:56px;padding-inline:max(16px,calc((100vw - 1040px)/2));background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.logo{font-weight:600;text-decoration:none;display:flex;gap:7px;align-items:center}
.logo i{font-style:normal;color:var(--accent)}.logo em{font-style:normal;font-weight:500;color:var(--accent)}
.bar nav{display:flex;gap:4px}
.bar nav a{text-decoration:none;padding:5px 12px;border-radius:4px;color:var(--muted);font-weight:500;font-size:14px}
.bar nav a:hover{color:var(--fg)}
.bar nav a.on{background:var(--surface-2);color:var(--fg)}
.theme-toggle{margin-left:auto;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;color:var(--muted)}
.theme-toggle:hover{color:var(--fg);background:var(--surface-2)}
.theme-toggle svg{width:18px;height:18px}

main{max-width:1040px;margin:0 auto;padding:32px 16px 96px}
main.view-practice{max-width:760px}
.head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px}
h1{font-size:28px;font-weight:500;letter-spacing:-.4px;line-height:1.3;text-wrap:balance}
.stat{color:var(--muted);font-size:13px}.stat b{color:var(--fg);font-family:var(--mono);font-weight:500}

/* Filters */
.filters{display:grid;gap:8px;margin-bottom:18px}
.chips{display:flex;flex-wrap:wrap;gap:4px}
.chip{padding:4px 11px;border-radius:4px;font-size:13px;color:var(--muted);display:inline-flex;gap:6px;align-items:center}
.chip:hover{color:var(--fg)}
.chip.on{background:var(--surface-2);color:var(--fg);font-weight:500}
.chip .acc{font:500 11px var(--mono);color:var(--ok)}.chip .acc.low{color:var(--no)}
.seg .chip{font-size:12px}
.scope{display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:13.5px;color:var(--muted);background:var(--surface);border-radius:6px;padding:10px 14px;margin-bottom:16px}
.scope b{color:var(--fg)}
.link{color:var(--accent);font-size:13px}

/* Question card */
.card{background:var(--surface);border-radius:8px;padding:22px}
.empty{color:var(--muted)}
.meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:12.5px;color:var(--muted);margin-bottom:12px}
.meta.center{justify-content:center}
.tag{font-size:11.5px;font-weight:600;padding:1px 8px;border-radius:4px;background:var(--surface-2);color:var(--fg)}
.context{font-size:14px;color:var(--muted);border-left:2px solid var(--line);padding-left:12px;margin-bottom:10px}
.prompt{font-size:18px;font-weight:500;line-height:1.65;margin-bottom:18px;text-wrap:pretty}
.pages{display:grid;gap:10px;margin-bottom:18px}
.pages img{width:100%;border-radius:6px;background:#fff;display:block}
.options{display:grid;gap:6px}
.options.compact{grid-template-columns:repeat(auto-fit,minmax(72px,1fr))}
.option{display:flex;gap:12px;align-items:center;text-align:left;padding:11px 14px;border:1px solid var(--line);border-radius:6px;font-size:14.5px;line-height:1.55;transition:border-color .12s,background .12s}
.option:hover:not(:disabled){border-color:var(--muted)}
.options.compact .option{justify-content:center;font-weight:600}
.options.compact kbd{display:none}
.option.picked{border-color:var(--accent);background:var(--accent-soft)}
.option.right{border-color:var(--ok);background:var(--ok-soft)}
.option.wrong{border-color:var(--no);background:var(--no-soft)}
.option:disabled:not(.right):not(.wrong){opacity:.55}
.number{display:flex;gap:8px}
.number input{flex:1;min-width:0;font:500 18px var(--mono);color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:9px 14px}
.number input:focus{outline:none;border-color:var(--accent)}
.btn{padding:8px 16px;border-radius:4px;font-size:14px;font-weight:600;background:var(--surface-2);display:inline-flex;gap:8px;align-items:center;white-space:nowrap}
.btn:hover:not(:disabled){filter:brightness(1.15)}
.btn:disabled{opacity:.45}
.btn.primary{background:var(--accent);color:var(--accent-ink)}
.btn.primary kbd{color:inherit;border-color:currentColor;opacity:.55}
.row{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:14px;font-size:13px}
.pair{display:flex;gap:8px}
.error{color:var(--no);font-size:13px;margin-top:8px}
.result{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);display:grid;gap:10px;font-size:14.5px}
.verdict{font-weight:600}
.result.ok .verdict{color:var(--ok)}.result.no .verdict{color:var(--no)}
.verdict b{color:var(--fg)}
.formula{font:14px/1.7 var(--mono);background:var(--bg);border-radius:6px;padding:10px 14px;overflow-x:auto}
.formula .katex-display{margin:0}


/* Library: card grid with typographic covers */
.lib-chips{margin-bottom:24px}

/* Library: one filter row (shelves left, reading status right), quiet per-card state */
.lib-filters{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 24px;margin-bottom:24px}
.cover-progress{display:block;height:4px;border-radius:2px;background:var(--surface-2);overflow:hidden}
.cover-progress i{display:block;height:100%;background:var(--accent)}
.cover .fav{position:absolute;right:14px;top:10px;font-size:15px;color:#ffd166}
.cover-progress{position:absolute;left:0;right:0;bottom:0;border-radius:0;background:rgba(255,255,255,.18)}
.post-meta .done{color:var(--ok)}
.post-meta .reading-now{color:var(--accent)}

/* Reader: a progress line under the top bar, favorite icon in the meta line, a short-lived resume notice */
.read-progress{position:fixed;left:0;right:0;top:56px;height:2px;z-index:6;pointer-events:none}
.read-progress i{display:block;height:100%;width:0;background:var(--accent);transition:width .15s linear}
.fav-toggle{font-size:16px;line-height:1;color:var(--faint);padding:2px 4px;border-radius:4px}
.fav-toggle:hover{color:var(--fg)}
.fav-toggle[aria-pressed="true"]{color:#e0a800}
.resume-toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:8;display:flex;align-items:center;gap:12px;max-width:calc(100vw - 32px);
  background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:10px 12px 10px 16px;font-size:13.5px;box-shadow:0 8px 24px rgba(0,0,0,.25);
  animation:toast-out .4s ease 7s forwards}
.resume-toast .link{font-size:13.5px}
.toast-x{color:var(--faint);font-size:18px;line-height:1;padding:0 4px}
.toast-x:hover{color:var(--fg)}
@keyframes toast-out{to{opacity:0;visibility:hidden}}
.reader-finish{display:grid;gap:14px;margin-top:40px;padding:18px;background:var(--surface);border-radius:8px}
.finish-status{margin:0!important;font-size:14.5px!important;color:var(--muted);display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px}
.finish-status.done{color:var(--ok)}
.finish-status .link{font-size:13px;color:var(--faint)}
.finish-next{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding-top:14px;border-top:1px solid var(--line);font-size:14px}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px 28px}
.post{text-decoration:none;display:flex;flex-direction:column;min-width:0}
.cover{--hue:150;position:relative;aspect-ratio:16/9;max-width:100%;border-radius:8px;overflow:hidden;margin-bottom:14px;
  background:radial-gradient(120% 140% at 85% 10%,hsl(var(--hue) 70% 42%) 0%,hsl(var(--hue) 60% 22%) 45%,hsl(var(--hue) 40% 9%) 100%);
  transition:transform .2s}
.post:hover .cover{transform:translateY(-2px)}
.cover .kicker{position:absolute;left:16px;top:13px;font:500 10.5px var(--mono);letter-spacing:1px;color:rgba(255,255,255,.72)}
.cover .suit{position:absolute;right:-6px;bottom:-34px;font-size:150px;line-height:1;color:rgba(255,255,255,.09)}
.cover .word{position:absolute;left:16px;right:16px;bottom:12px;font:500 clamp(20px,2.3vw,28px)/1.15 var(--sans);color:#fff;letter-spacing:-.3px;text-wrap:balance}
.post h2{font-size:17px;font-weight:500;line-height:1.45;margin-bottom:6px;text-wrap:balance}
.post:hover h2{color:var(--accent)}
.post p{font-size:13.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:12px}
.post-meta{margin-top:auto;display:flex;flex-wrap:wrap;gap:4px 10px;align-items:center;font-size:12px;color:var(--faint)}

/* Library from nav.yaml: group headings, a collapsed tag filter (tags.yaml), clickable card tags */
.post-card{display:flex;flex-direction:column;min-width:0}
.post-card .post{flex:1}
.post-num{font:500 13px var(--mono);color:var(--faint);margin-right:8px}
.post-meta .badge{font-size:11px;padding:0 6px;border-radius:4px;background:var(--accent-soft);color:var(--accent)}
.post-meta .badge.warn{background:rgba(224,168,0,.14);color:#e0a800}
.post-tags{display:flex;flex-wrap:wrap;gap:2px 10px;margin-top:6px}
.post-tag{font-size:12px;color:var(--faint);padding:0}
.post-tag:hover{color:var(--accent)}
.post-tag.danger,.lib-facet.danger{color:var(--no)}
.lib-group{font-size:14px;font-weight:600;color:var(--muted);margin:36px 0 16px;letter-spacing:.3px}
.lib-group:first-of-type{margin-top:8px}
.article-position{font-size:12.5px;color:var(--faint);margin-bottom:6px;letter-spacing:.3px}

/* Library layout: index sidebar + main column; the filter is one button that opens a checkbox panel */
.lib-filters{position:relative}
.lib-filter-btn{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;color:var(--fg);padding:6px 4px}
.lib-filter-btn:hover,.lib-filter-btn[aria-expanded="true"]{color:var(--accent)}
.lib-filter-icon{font-size:15px;line-height:1}
.lib-panel{position:absolute;right:0;top:calc(100% + 6px);z-index:10;width:min(520px,100%);display:grid;gap:6px;padding:12px 16px 14px;
  background:var(--surface);border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 28px rgba(0,0,0,.22)}
.lib-panel-head{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:600;margin-bottom:4px}
.lib-panel-head .link{font-size:12.5px;font-weight:400;color:var(--muted);margin-left:12px}
.lib-close{font-size:16px!important;line-height:1}
.lib-row{display:flex;gap:10px;align-items:baseline}
.lib-row-label{flex:0 0 56px;font-size:12px;color:var(--faint)}
.lib-row-tags{display:flex;flex-wrap:wrap;gap:4px}
.lib-facet{font-size:12.5px;padding:2px 9px;border-radius:999px;color:var(--muted);background:transparent;border:1px solid var(--line);display:inline-flex;gap:5px;align-items:baseline}
.lib-facet:hover:not(:disabled){color:var(--fg);border-color:var(--muted)}
.lib-facet[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.lib-facet:disabled{opacity:.35;cursor:default}
.lib-count{font:10.5px var(--mono);color:var(--faint)}
.lib-selected{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;margin:-12px 0 18px}
.lib-chip{font-size:12.5px;padding:2px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}
.lib-selected .link{font-size:12.5px;color:var(--faint)}
.lib-index{font-size:13px;scrollbar-width:thin}
.lib-index summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:6px;padding:4px 0}
.lib-index summary::-webkit-details-marker{display:none}
.lib-index summary::before{content:'▸';font-size:10px;color:var(--faint);width:10px;transition:transform .15s}
.lib-index details[open]>summary::before{transform:rotate(90deg)}
.lib-index-title{font-size:14px;font-weight:600;color:var(--fg)}
.idx-heading{font-size:11.5px;color:var(--faint);letter-spacing:.5px;margin:14px 0 4px}
.idx-dim>summary{color:var(--fg);font-weight:500}
.idx-dim>.idx-tag,.idx-dim>ul{margin-left:14px}
.idx-tag>summary{color:var(--muted)}
.idx-count{margin-left:auto;font:11px var(--mono);color:var(--faint)}
.lib-index ul{list-style:none;margin:2px 0 6px 16px;padding:0;border-left:1px solid var(--line)}
.lib-index li a{display:block;padding:3px 0 3px 10px;color:var(--muted);text-decoration:none;line-height:1.45}
.lib-index li a:hover{color:var(--accent)}
.lib-index li a.read{color:var(--faint)}
.idx-num{font:11px var(--mono);color:var(--faint);margin-right:6px}
.lib-index li a.current{color:var(--accent);font-weight:500;box-shadow:inset 2px 0 0 var(--accent)}

/* Docs-site frame (after Starlight): on article pages the header spans the window, the index is a
   fixed pane flush with the left edge, and in the reader this article's outline is a fixed pane on the right. */
#app:has(main.view-library) .bar{padding-inline:24px}
main.view-library{max-width:none;margin:0;padding:0}
.lib-index{position:fixed;top:56px;bottom:0;left:0;z-index:3;width:var(--side-width);overflow-y:auto;padding:16px 16px 40px;
  background:var(--surface);border-right:1px solid var(--line)}
.lib-main{margin-left:var(--side-width);padding:32px 40px 96px;min-width:0}
.reader-layout.has-index{display:block;margin:0 var(--toc-width) 0 var(--side-width);padding:32px 48px 96px}
.reader-layout.has-index .reader{max-width:var(--measure);margin:0 auto}
.reader-layout.has-index .reader-outline{position:fixed;top:56px;bottom:0;right:0;width:var(--toc-width);max-height:none;padding:24px 20px;border-left:1px solid var(--line)}
:root{--side-width:280px;--toc-width:240px}
@media (max-width:1180px){
  .reader-layout.has-index{margin-right:0}
  .reader-layout.has-index .reader-outline{display:none}
  .reader-layout.has-index .reader-outline-bar button,.reader-layout.has-index .reader-outline-bar [data-reader-current]{display:block}
}
@media (max-width:900px){
  #app:has(main.view-library) .bar{padding-inline:16px}
  main.view-library{padding:22px 16px 96px}
  .lib-index{position:static;width:auto;border:1px solid var(--line);border-radius:8px;padding:8px 12px;margin-bottom:16px}
  .lib-main{margin-left:0;padding:0}
  .reader-layout.has-index{margin:0;padding:0}
  .reader-layout .lib-index{display:none}
  .lib-panel{position:static;width:100%;margin-top:10px;box-shadow:none}
}

.tool-tabs{display:flex;gap:24px;border-bottom:1px solid var(--line);margin-bottom:28px}
.tool-tabs a{padding:8px 0 12px;color:var(--muted);text-decoration:none;border-bottom:2px solid transparent}
.tool-tabs a[aria-current="page"]{color:var(--accent);border-bottom-color:var(--accent)}

/* Reader */
.reader{max-width:var(--measure);width:100%;min-width:0;margin:0 auto}
.reader-layout{display:grid;grid-template-columns:var(--nav-width) minmax(0,var(--measure));gap:var(--space-8);justify-content:center;align-items:start}
.reader-outline{position:sticky;top:80px;max-height:calc(100dvh - 104px);overflow-y:auto;padding:4px 14px 12px 0;scrollbar-width:thin}
.outline-label{font-size:12px;font-weight:600;letter-spacing:1px;color:var(--faint);margin-bottom:14px}
.reader-outline nav ol,.outline-dialog nav ol{list-style:none;padding:0;margin:0 0 20px}
.reader-outline nav li,.outline-dialog nav li{margin-bottom:4px}
[data-reader-section]{display:block;width:100%;text-align:left;padding:8px 10px;border-left:2px solid transparent;border-radius:0 4px 4px 0;font-size:13px;line-height:1.6;color:var(--muted);overflow-wrap:anywhere}
[data-reader-section]:hover{color:var(--fg);background:var(--surface)}
[data-reader-section][aria-current="location"]{border-left-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.reader-outline-bar{display:flex;align-items:center;gap:12px;margin-bottom:var(--space-8)}
.reader-outline-bar button,.reader-outline-bar [data-reader-current]{display:none}
.outline-dialog{position:fixed;inset:0 auto 0 0;margin:0;width:min(360px,90vw);max-width:none;height:100dvh;max-height:none;padding:20px;background:var(--bg);color:var(--fg);border:0;border-right:1px solid var(--line);overflow-y:auto}
.outline-dialog::backdrop{background:rgba(0,0,0,.55)}
.outline-dialog header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}
.outline-dialog h2{font-size:18px;font-weight:500;margin:0}
.outline-dialog [data-reader-section]{font-size:15px;padding-block:12px}
.reader .back{font-size:13px;color:var(--muted);text-decoration:none}
.reader h1{font-size:var(--font-h1);font-weight:600;line-height:1.45;margin:0 0 var(--space-3);text-wrap:balance}
.article-header{margin-bottom:var(--space-8);padding-bottom:var(--space-6);border-bottom:1px solid var(--line)}
.reader .article-subtitle{font-size:18px;color:var(--muted);line-height:1.7;margin-bottom:var(--space-4)}
.article-position a{color:inherit;text-decoration:none}.article-position a:hover{color:var(--accent)}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 var(--space-4)}
.article-tag{text-decoration:none;font-size:13px;padding:3px 11px;border-radius:999px;color:var(--fg);background:var(--surface);border:1px solid var(--line);transition:border-color .12s,color .12s}
.article-tag:hover{border-color:var(--accent);color:var(--accent)}
.article-tag.danger{color:var(--no)}
.article-meta{display:flex;gap:8px 16px;flex-wrap:wrap;align-items:center;color:var(--muted);font-size:var(--font-small)}
.article-meta .fav-toggle{margin-left:auto}
.reader .byline{color:var(--faint);font-size:var(--font-caption);line-height:1.7;margin:8px 0 0;overflow-wrap:anywhere}
.reader .meta{margin-top:20px;margin-bottom:6px}
.reader h2{color:var(--accent);font-size:var(--font-h2);font-weight:500;margin:var(--space-8) 0 var(--space-3)}
.reader p,.reader li{font-size:var(--font-body);line-height:var(--leading-body)}
.reader p{margin-bottom:1em}
.reader-content>ul,.reader-content>ol{margin-block:var(--space-6);padding-left:1.5em}
.reader-content li+li{margin-top:var(--space-2)}
.reader-content .article-lead{color:var(--fg)}
.reader .lede{color:var(--muted);font-size:16.5px}
.reader .formula{margin:var(--space-6) 0}
.article-pagination{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;border-top:1px solid var(--line);margin-top:var(--space-8);padding-top:var(--space-6)}
.article-pagination a{min-width:0;text-decoration:none;display:grid;gap:6px}
.article-pagination span{color:var(--muted);font-size:var(--font-small)}
.article-pagination strong{font-size:15px;font-weight:500;overflow-wrap:anywhere}
.article-pagination a:hover strong{color:var(--accent)}
.article-next{text-align:right}
.inline-term{display:inline;padding:0;border-bottom:1px dashed var(--accent);border-radius:0;color:inherit;font:inherit;line-height:inherit;text-align:inherit}
.inline-term:hover{color:var(--accent);background:var(--accent-soft)}
.inline-source{font-size:.7em;line-height:0;vertical-align:super;margin-left:2px}
.inline-source button{padding:0 3px;color:var(--accent);font:inherit;line-height:1.2;min-width:1.2em}
.annotation-definition,.annotation-note,.annotation-location{margin:0 0 12px;line-height:1.8;overflow-wrap:anywhere}
.annotation-location{color:var(--muted);font-size:var(--font-small)}
.annotation-related{display:grid;gap:8px;margin-top:16px;padding-top:12px;border-top:1px solid var(--line)}
.annotation-related p{margin:0;color:var(--faint);font-size:var(--font-small)}
.annotation-related a,.annotation-book-link{color:var(--accent);text-underline-offset:3px}
.annotation-page-image{display:grid;gap:8px;width:100%;margin-top:16px;padding:0;text-align:left;color:var(--accent);font-size:var(--font-small)}
.annotation-page-image img{display:block;max-width:100%;max-height:300px;object-fit:contain;object-position:left;cursor:zoom-in}
.reading-error,.reading-notice{font-size:.875rem;line-height:1.6;margin:12px 0;overflow-wrap:anywhere}
.reading-error{color:var(--no)}.reading-notice{color:var(--accent)}
.reading-error:empty,.reading-notice:empty{display:none}
.reader-content h2{scroll-margin-top:80px}
.reading-backup{border-top:1px solid var(--line);padding-top:18px;margin-top:30px;font-size:.875rem}
.reading-backup summary{cursor:pointer;color:var(--muted)}
.reading-backup p{margin:14px 0;max-width:680px;color:var(--muted)}
.reading-backup .row{flex-wrap:wrap;justify-content:flex-start;gap:12px}
.backup-file{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.backup-file input{max-width:100%;font:inherit;color:var(--muted)}
.backup-text{display:block;margin-top:16px;color:var(--muted)}
.backup-text textarea{display:block;box-sizing:border-box;width:100%;height:12rem;margin-top:8px;padding:12px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--fg);font:.875rem/1.5 var(--mono);resize:vertical}
.import-preview{background:var(--surface);padding:4px 16px 16px;margin-top:16px;border-radius:8px}
/* Keep KaTeX's internal span layout intact; scroll only the formula, not the page. */
.math-block,.math-display{max-width:100%;overflow-x:auto;overflow-y:hidden;padding-block:12px}
.math-block{font-family:var(--sans);font-size:1rem}
.math-display{display:block;margin:12px 0}
.math-inline .katex{font-size:1.06em}
.math-block .katex-display,.math-display .katex-display{margin:0;min-width:100%;width:max-content;text-align:center}
.math-block .katex-display>.katex,.math-display .katex-display>.katex{text-align:center}
.math-error{font-family:var(--mono);font-size:.9em;overflow-wrap:anywhere}
/* Cards in running text: bold rank + suit, colored by suit, never split across lines */
.pcards{white-space:nowrap;font-weight:600;letter-spacing:.2px}
.pcard.suit-s,.tile.suit-s{color:var(--suit-s)}.pcard.suit-h,.tile.suit-h{color:var(--suit-h)}
.pcard.suit-d,.tile.suit-d{color:var(--suit-d)}.pcard.suit-c,.tile.suit-c{color:var(--suit-c)}

/* Range chart: 13×13 grid, each cell split left-to-right by action frequency */
.range-chart{position:relative;margin:22px 0;padding:18px;background:var(--surface);border-radius:8px}
.rc-board{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px;margin:0 0 12px!important;font:600 18px/1.2 var(--mono)}
.rc-board small{font:400 12px var(--sans);color:var(--faint);margin-left:8px}
.rc-cell.rc-dead{opacity:.25}
.rc-cell.rc-split::after{content:'';position:absolute;right:2px;top:2px;width:4px;height:4px;border-radius:50%;background:var(--fg);opacity:.75}
.rc-cell{position:relative}
.rc-cell.rc-on{outline:2px solid var(--accent);outline-offset:-2px}
.rc-card{position:absolute;z-index:3;width:min(300px,calc(100% - 16px));padding:12px 14px;background:var(--bg);border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.35);font-size:12.5px;pointer-events:none}
.rc-card-head{display:flex;justify-content:space-between;align-items:baseline;margin:0 0 8px!important;font:600 15px var(--mono)}
.rc-card-head small{font:400 12px var(--sans);color:var(--faint)}
.rc-row{display:grid;grid-template-columns:minmax(0,1fr) 90px 46px;gap:8px;align-items:center;margin:4px 0}
.rc-row span:first-child{display:flex;gap:6px;align-items:center;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rc-row span:first-child i{flex:none;width:9px;height:9px;border-radius:2px}
.rc-row b{font:500 12px var(--mono);text-align:right}
.rc-bar{height:6px;border-radius:3px;background:var(--surface-2);overflow:hidden}
.rc-bar i{display:block;height:100%}
.rc-sub{margin:10px 0 4px!important;font-size:11.5px!important;color:var(--faint)}
.rc-combo{display:grid;grid-template-columns:auto auto 44px minmax(0,1fr);gap:4px 6px;align-items:center;margin:3px 0;font-family:var(--mono);font-weight:600}
.rc-combo small{font:400 11.5px var(--sans);color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rc-mini{height:8px;border-radius:2px;background:var(--act-rest)}
.rc-empty{color:var(--faint);margin:0!important}
.rc-title{font-size:14px!important;font-weight:600;margin:0 0 12px!important;line-height:1.5!important}
.rc-grid{display:grid;grid-template-columns:repeat(13,minmax(0,1fr));gap:2px;max-width:560px}
.rc-cell{aspect-ratio:1;display:grid;place-items:center;border-radius:2px;background:var(--act-rest);color:#fff;
  font:500 clamp(7px,1.6vw,11px)/1 var(--mono);text-shadow:0 0 2px rgba(0,0,0,.45);overflow:hidden;cursor:default}
.rc-cell.rc-rest{color:var(--act-rest-ink);text-shadow:none}
.rc-cell.rc-hl{outline:2px solid var(--fg);outline-offset:-2px}
.rc-legend{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:12px;font-size:12.5px;color:var(--muted)}
.rc-key{display:inline-flex;align-items:baseline;gap:6px}
.rc-key i{width:10px;height:10px;border-radius:2px;align-self:center}
.rc-key b{color:var(--fg);font:500 12.5px var(--mono)}
.rc-key small{color:var(--faint);font-size:11.5px}
.range-chart figcaption{margin-top:12px;padding-top:10px;border-top:1px solid var(--line);font-size:12.5px;color:var(--faint);line-height:1.6}
.rc-source{display:block}

/* Key takeaway box */
.key-box{margin:var(--space-6) 0;padding:14px 18px;border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0}
.key-box .key-label{font-size:12px!important;font-weight:600;color:var(--accent);letter-spacing:.5px;margin:0 0 4px!important;line-height:1.4!important}
.key-box p:last-child{margin:0!important;font-weight:500;color:var(--fg)}

/* Tables */
.table-wrap{margin:20px 0;overflow-x:auto;border:1px solid var(--line);border-radius:8px}
.table-wrap table{width:100%;border-collapse:collapse;font-size:14px;line-height:1.6}
.table-wrap th,.table-wrap td{padding:9px 14px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.table-wrap th{background:var(--surface);font-weight:600;color:var(--muted);font-size:13px}
.table-wrap tr:last-child td{border-bottom:0}
.table-wrap td{font-variant-numeric:tabular-nums}
.table-wrap .a-right{text-align:right}.table-wrap .a-center{text-align:center}

/* Original book figure (whole page or a crop) */
.book-figure{margin:22px 0}
.bf-frame{position:relative;overflow:hidden;border-radius:6px;background:#fff;max-width:100%}
.bf-frame img{display:block;width:100%}
.bf-frame.bf-crop img{position:absolute;max-width:none}
.book-figure figcaption{margin-top:8px;font-size:13px;color:var(--muted);line-height:1.6}
.bf-source{display:block;font-size:12px;color:var(--faint)}

/* Data chart */
.data-chart{margin:22px 0;padding:18px;background:var(--surface);border-radius:8px}
.ch-title{font-size:14px!important;font-weight:600;margin:0 0 8px!important;line-height:1.5!important}
.data-chart svg{display:block;width:100%;height:auto;overflow:visible}
.ch-grid{stroke:var(--line);stroke-width:1}
.ch-tick{fill:var(--faint);font:11px var(--mono)}
.ch-label{fill:var(--muted);font:12px var(--sans)}
.ch-line{fill:none;stroke:var(--c);stroke-width:2.5;stroke-linejoin:round;stroke-linecap:round}
.ch-dot{fill:var(--c);stroke:var(--surface);stroke-width:1.5}
.ch-bar{fill:var(--c)}
.ch-legend{display:flex;flex-wrap:wrap;gap:6px 16px;margin-top:8px;font-size:12.5px;color:var(--muted)}
.ch-legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:6px;vertical-align:-1px}
.data-chart figcaption{margin-top:10px;padding-top:10px;border-top:1px solid var(--line);font-size:12.5px;color:var(--faint);line-height:1.6}
.ch-source{display:block}

/* Board figure */
.board{margin:22px 0;padding:18px;background:var(--surface);border-radius:8px}
.board-row{display:flex;flex-wrap:wrap;gap:16px 22px;align-items:flex-start}
.street{display:flex;flex-direction:column;gap:8px;min-width:0}
.street.hand{padding-right:22px;border-right:1px solid var(--line)}
.tiles{display:flex;gap:5px}
.tile{width:44px;height:60px;border-radius:6px;background:var(--bg);border:1px solid var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1;font-family:var(--mono)}
.tile b{font-size:21px;font-weight:600}
.tile i{font-style:normal;font-size:17px;margin-top:3px}
.street-label{font-size:12.5px!important;line-height:1.5!important;color:var(--faint);margin:0!important;max-width:220px}
.street-label>.street-action{display:block;color:var(--muted)}
.board figcaption{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:12.5px;color:var(--faint)}

.example{background:var(--surface);border-radius:8px;padding:16px 18px;margin:18px 0}
.example .example-label{font-size:12px;font-weight:600;color:var(--accent);letter-spacing:.5px;margin-bottom:6px}
.example p,.example li{font-size:14.5px}
.example ol{padding-left:20px;margin:8px 0}
.example p:last-child{margin-bottom:0}
.scope-note{font-size:13.5px!important;color:var(--faint);border-top:1px solid var(--line);padding-top:14px;margin-top:28px}
.loading{margin-top:40px}
.cta{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:40px;background:var(--surface);border-radius:8px;padding:16px 18px;font-size:14px}

@media (max-width:900px){
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .reader-layout,.reader-layout.has-index{display:block}.reader-outline{display:none}.reader-layout .lib-index{display:none}
  .reader-outline-bar{display:flex;align-items:center;gap:12px;position:sticky;top:56px;z-index:4;padding:8px 0;background:var(--bg);border-bottom:1px solid var(--line);margin-top:12px}
  .reader-outline-bar button,.reader-outline-bar [data-reader-current]{display:block}
  .reader-outline-bar .back{flex-shrink:0}
  .reader-outline-bar .btn{font-size:13px;padding:6px 10px;flex-shrink:0}
  .reader-outline-bar span{min-width:0;font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .reader-content h2{scroll-margin-top:128px}
  .article-pagination{position:fixed;z-index:4;bottom:0;left:0;right:0;max-width:var(--measure);margin:0 auto;padding:10px 16px max(10px,env(safe-area-inset-bottom));background:var(--bg);gap:20px}
  .article-pagination strong{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .article-pagination a{gap:2px}
  .view-library:has(.reader){padding-bottom:120px}
}
@media (max-width:720px){
  .bar{gap:16px}
  main{padding-top:22px}
  .card{padding:16px}
  .prompt{font-size:16.5px}
  .reader h1{font-size:26px}
}
@media (max-width:560px){.cards{grid-template-columns:minmax(0,1fr)}}
@media (max-width:380px){
  .bar{gap:8px;padding-inline:12px}
  .bar .logo{gap:4px;font-size:13px}
  .bar nav a{padding-inline:6px;white-space:nowrap}
  .theme-toggle{width:30px;height:30px;flex-shrink:0}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Imported article bodies retain semantic structure and use the reader palette. */
.web-content{overflow-wrap:anywhere;line-height:1.9}
.web-content :is(h3,h4,h5,h6){line-height:1.5;margin:1.8em 0 .65em}
.web-content :is(ul,ol){padding-left:1.7em;margin:1em 0}
.web-content li{margin:.35em 0}
.web-content figure{margin:1.6em 0}
.web-content img{display:block;max-width:100%;height:auto;margin:auto;border-radius:8px}
.web-content figcaption{font-size:.88em;line-height:1.6;opacity:.78;margin-top:.65em;text-align:center}
.web-content a{text-decoration:underline;text-underline-offset:3px;color:inherit}
.web-content .web-image-link{display:block}
.web-content blockquote{margin:1.4em 0;padding:.35em 1.2em;border-left:3px solid currentColor;opacity:.86}
.web-content table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:1.4em 0}
.web-content :is(td,th){padding:.55em .8em;border:1px solid #8886;text-align:left}
.web-content pre{overflow:auto;white-space:pre-wrap}
.web-content details{margin:1.2em 0;padding:.75em 1em;border:1px solid #8885;border-radius:8px}
.web-content summary{cursor:pointer;font-weight:600;line-height:1.6}
.web-content details[open]>summary{margin-bottom:.8em}