/* ======================================================================
   assets/site.css
   Shared stylesheet for every page in llm-internals.
   ====================================================================== */


/* ======================================================================

                               THE KNOB

   ----------------------------------------------------------------------
   --measure is the width of the content column. Everything obeys it:
   prose, figures, tables, code blocks, callouts, captions, and the 72-
   character banner rules (whose font-size is derived from it, so they
   always span exactly one column width).

   Change this one value and the whole site follows.

     620px   classic prose measure, ~72 characters. Narrow but easiest
             to read; interactive figures get cramped.
     720px   the default. ~84 characters.
     820px   roomier figures, prose starts to feel long.

   ====================================================================== */

:root{
  --measure: 720px;    /* <- the only width you need to touch */
  --side-w:  200px;    /* sidebar width on wide screens       */
  --gutter:  20px;     /* page edge padding on narrow screens */
}


/* ======================================================================
   Palette and type
   ====================================================================== */

:root{
  --paper:#E7EBE7; --card:#F3F6F2; --ink:#16232A; --soft:#4A5A61;
  --faint:#7C8A8E; --rule:#A9B6B2; --rule-2:#C9D2CE;
  --q:#1C6A87;     /* query / links  */
  --k:#A34E19;     /* key / warm     */
  --v:#5A4789;     /* value          */
  --hit:#2C7A57;   /* cache hit      */
  --warn:#9E2B45;  /* cache miss     */
  --serif:Spectral,"Iowan Old Style",Georgia,serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--serif); font-size:17px; line-height:1.62;
}
a{color:var(--q);text-decoration:none;border-bottom:1px solid var(--rule)}
a:hover{border-bottom-color:var(--q)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{
  outline:2px solid var(--q); outline-offset:2px;
}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}


/* ======================================================================
   Layout — one column, one width, everything aligned to it
   ====================================================================== */

.shell{padding:0 var(--gutter)}
.wrap{
  width:100%; max-width:var(--measure);
  margin:0 auto; padding-bottom:120px;
}

/* every block-level child of the column fills it exactly */
.wrap > *{max-width:100%}


/* ======================================================================
   Navigation — top bar on narrow screens, sidebar on wide
   ====================================================================== */

.bar{border-bottom:1px solid var(--rule);background:var(--card);
     font-family:var(--mono);font-size:12.5px}
.bar .inner{max-width:var(--measure);margin:0 auto;padding:10px var(--gutter);
            display:flex;gap:18px;flex-wrap:wrap;align-items:baseline}
.bar a{border:0;color:var(--soft)}
.bar a[aria-current]{color:var(--ink);font-weight:600}
.bar a:hover{color:var(--q)}
.bar .who{margin-left:auto;color:var(--faint)}

.side{display:none}
.side .brand{font-family:var(--mono);font-size:12.5px;font-weight:600;
             color:var(--ink);letter-spacing:.02em;margin-bottom:16px}
.side nav{display:flex;flex-direction:column;gap:1px;margin-bottom:28px}
.side nav a{font-family:var(--mono);font-size:12.5px;color:var(--soft);border:0;
            border-left:2px solid var(--rule-2);padding:5px 0 5px 12px;line-height:1.35}
.side nav a:hover{color:var(--q);border-left-color:var(--rule)}
.side .pages a[aria-current]{color:var(--ink);font-weight:600;border-left-color:var(--ink)}
.side .lab{font-family:var(--mono);font-size:11px;color:var(--faint);margin-bottom:9px}
.side .toc a{font-size:11.5px;padding:4px 0 4px 12px}
.side .toc a.on{color:var(--q);border-left-color:var(--q)}

/* Wide screens: sidebar in, top bar out.
   This block MUST stay after every base .side / .bar rule above — media
   queries carry no extra specificity, so an equal-specificity rule later
   in the file would silently win and hide the sidebar at all widths. */
@media(min-width:1024px){
  .shell{
    display:flex; gap:52px; justify-content:center;
    align-items:flex-start; padding:0 24px;
  }
  .side{display:block;flex:0 0 var(--side-w);position:sticky;top:0;
        max-height:100vh;overflow-y:auto;padding:56px 0 40px}
  .wrap{flex:0 1 var(--measure)}
  .bar{display:none}
}


/* ======================================================================
   Headings and banner rules

   Banner rules are built in site.js: the font-size is fixed and the
   number of characters is computed to fill the column exactly, so they
   always span --measure however you set it. (Deriving the font-size
   from the width instead does not work -- browsers snap monospace
   advances to whole pixels, so the rule lands short at most widths.)
   ====================================================================== */

header.title{padding:56px 0 8px}
header.title h1{font-size:clamp(30px,6.2vw,46px);line-height:1.08;
                margin:0 0 14px;font-weight:600;letter-spacing:-.015em}
header.title p.stand{font-size:19px;color:var(--soft);margin:0}

.bannerwrap{margin:64px 0 22px}
.bannerwrap h2{margin:0;font-weight:400}
.bannerwrap h2 .art{
  display:block;overflow-x:auto;font-family:var(--mono);
  font-size:13px; line-height:1.35;
  color:var(--rule);white-space:pre;margin:0;font-weight:400;
}
.bannerwrap h2 .art b{color:var(--ink);font-weight:600}

h3{font-family:var(--mono);font-weight:600;font-size:14.5px;color:var(--ink);margin:40px 0 10px}
h3::before{content:"# ===== ";color:var(--rule-2);font-weight:400}
h4{font-family:var(--mono);font-size:13px;font-weight:600;margin:26px 0 8px}
h4::before{content:"# --- ";color:var(--rule-2);font-weight:400}

.bannerwrap,header.title{scroll-margin-top:22px}


/* ======================================================================
   Body copy
   ====================================================================== */

p{margin:0 0 18px}
ul,ol{padding-left:22px}
li{margin-bottom:9px}
dfn{font-style:normal;font-weight:600;border-bottom:2px solid var(--rule-2)}
.mono{font-family:var(--mono)}

code{font-family:var(--mono);font-size:.87em;background:var(--card);
     padding:1px 5px;border:1px solid var(--rule-2);border-radius:2px}
pre{font-family:var(--mono);font-size:12.5px;line-height:1.6;background:var(--card);
    border:1px solid var(--rule-2);padding:14px 16px;overflow-x:auto}
pre code{background:none;border:0;padding:0;font-size:inherit}

.note{border-left:3px solid var(--rule);padding:2px 0 2px 16px;
      color:var(--soft);font-size:16px;margin:22px 0}
.note strong{color:var(--ink)}
.note.hot{border-left-color:var(--warn)}

.tldr{border:1px solid var(--ink);background:#fff;padding:20px 24px 8px;margin:36px 0}
.tldr .hd{font-family:var(--mono);font-size:12.5px;font-weight:600;
          color:var(--soft);margin-bottom:12px}
.tldr ol{margin:0;padding-left:20px}
.tldr li{margin-bottom:10px}

.readmore{background:var(--card);border:1px solid var(--rule);padding:18px 20px;margin:34px 0}
.readmore h4{margin-top:0}
.readmore ul{margin-bottom:0}

footer{margin-top:70px;padding-top:20px;border-top:1px solid var(--rule-2);
       font-family:var(--mono);font-size:12px;color:var(--faint)}
footer p{margin-bottom:8px}


/* ======================================================================
   Figures — the caption is the same width as what it captions
   ====================================================================== */

figure{margin:26px 0;background:var(--card);border:1px solid var(--rule-2);padding:18px}
figcaption{font-size:14px;color:var(--soft);margin-top:14px;
           padding-top:12px;border-top:1px solid var(--rule-2)}
svg{width:100%;height:auto;display:block}


/* ======================================================================
   Tables
   ====================================================================== */

table{border-collapse:collapse;width:100%;font-size:14px;font-family:var(--mono)}
th,td{text-align:left;padding:7px 12px 7px 0;border-bottom:1px solid var(--rule-2);
      vertical-align:top}
th{color:var(--soft);font-weight:500}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.tblscroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin-bottom:18px}
@media(max-width:660px){table{font-size:12.5px;min-width:430px}}


/* ======================================================================
   Controls shared by the interactive figures
   ====================================================================== */

.btn{font-family:var(--mono);font-size:13px;border:1px solid var(--ink);
     background:var(--ink);color:var(--card);padding:7px 14px;cursor:pointer;border-radius:2px}
.btn.ghost{background:transparent;color:var(--ink)}
.btn:disabled{opacity:.35;cursor:not-allowed}
button.tok,.chip{font-family:var(--mono);font-size:13px;border:1px solid var(--rule);
                 background:#fff;color:var(--ink);padding:5px 9px;cursor:pointer;border-radius:2px}
button.tok[aria-pressed="true"]{background:var(--ink);color:var(--card);border-color:var(--ink)}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
label.sl{display:block;font-family:var(--mono);font-size:12.5px;color:var(--soft);margin-bottom:4px}
input[type=range]{width:100%;accent-color:var(--q)}
select,input[type=number],input[type=text]{font-family:var(--mono);font-size:13px;padding:6px 8px;
       border:1px solid var(--rule);background:#fff;border-radius:2px;color:var(--ink)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:620px){.grid2,.grid3{grid-template-columns:1fr}}
.stat{font-family:var(--mono);font-size:12.5px;color:var(--soft)}
.stat b{color:var(--ink);font-variant-numeric:tabular-nums}


/* ======================================================================
   transformers.html
   ====================================================================== */

.abar{height:12px;background:var(--q);transition:width .28s ease}
.arow{display:grid;grid-template-columns:minmax(64px,86px) 1fr 54px;gap:10px;
      align-items:center;margin-bottom:6px;font-family:var(--mono);font-size:12.5px}
.arow .lbl{text-align:right;color:var(--soft);overflow:hidden;
           text-overflow:ellipsis;white-space:nowrap}
.arow .val{text-align:right;font-variant-numeric:tabular-nums;color:var(--soft)}
.arow.masked{opacity:.3}
.track{background:var(--rule-2);height:12px}

.heat{display:grid;gap:2px}
.cell{aspect-ratio:1;border-radius:1px}
.headcap{font-family:var(--mono);font-size:11.5px;color:var(--soft);margin-bottom:6px}

.steps{font-family:var(--mono);font-size:13px}
.steps .st{padding:9px 0;border-bottom:1px solid var(--rule-2);opacity:.32;transition:opacity .2s}
.steps .st.on{opacity:1}
.steps .st .k{color:var(--faint);display:inline-block;min-width:158px;padding-right:12px}

.emtbl{font-family:var(--mono);font-size:11.5px;border:1px solid var(--rule-2);
       background:#fff;overflow-x:auto}
.emrow{display:flex;border-bottom:1px solid #EEF2EE;white-space:nowrap}
.emrow:last-child{border-bottom:0}
.emrow .idx{min-width:118px;padding:5px 8px;color:var(--faint);
            border-right:1px solid #EEF2EE;position:sticky;left:0;background:#fff}
.emrow .cellv{min-width:52px;padding:5px 6px;text-align:right;color:var(--soft);
              font-variant-numeric:tabular-nums}
.emrow.on{background:rgba(28,106,135,.10)}
.emrow.on .idx{color:var(--q);font-weight:600;background:#EAF1F4}
.emrow.on .cellv{color:var(--ink)}
.vecline{font-family:var(--mono);font-size:12px;white-space:nowrap;overflow-x:auto;
         padding:5px 0;display:flex;align-items:center}
.vecline .tag{min-width:158px;color:var(--faint);position:sticky;left:0;
              background:var(--card);padding-right:10px}
.vecline .n{min-width:56px;text-align:right;font-variant-numeric:tabular-nums}


/* ======================================================================
   llms.html
   ====================================================================== */

.req{font-family:var(--mono);font-size:12.5px;border:1px solid var(--rule-2);
     background:#fff;margin-bottom:10px}
.req .hd{padding:6px 10px;border-bottom:1px solid var(--rule-2);color:var(--soft);
         display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.req .ln{padding:3px 10px;display:flex;gap:10px}
.req .ln .who{min-width:66px;color:var(--faint)}
.req .ln.new{background:rgba(163,78,25,.10)}
.req .ln.old{color:var(--soft)}
.legend{font-family:var(--mono);font-size:12px;color:var(--soft);
        display:flex;gap:16px;flex-wrap:wrap;margin-bottom:12px}
.sw{display:inline-block;width:11px;height:11px;vertical-align:-1px;
    margin-right:5px;border:1px solid var(--rule-2)}
.tokline{font-family:var(--mono);font-size:12.5px;color:var(--soft);margin-top:10px}
.ctxbar{display:flex;height:34px;border:1px solid var(--rule);
        font-family:var(--mono);font-size:11px}
.ctxbar div{display:flex;align-items:center;justify-content:center;
            overflow:hidden;color:#fff;white-space:nowrap}


/* ======================================================================
   cache.html
   ====================================================================== */

.strip{display:flex;height:44px;border:1px solid var(--rule);
       font-family:var(--mono);font-size:11.5px;margin-bottom:8px}
.strip div{display:flex;align-items:center;justify-content:center;overflow:hidden;
           white-space:nowrap;color:#fff;transition:flex-grow .25s ease}
.striplbl{font-family:var(--mono);font-size:12px;color:var(--soft);margin-bottom:6px}

.tl{position:relative;height:60px;border:1px solid var(--rule);background:#fff;
    overflow:hidden;margin-bottom:10px}
.tl .warm{position:absolute;top:0;bottom:0;background:rgba(44,122,87,.16)}
.tl .ev{position:absolute;top:0;bottom:0;width:2px;background:var(--ink)}
.tl .ev.miss{background:var(--warn)}
.tl .ev.hit{background:var(--hit)}
.tl .now{position:absolute;top:0;bottom:0;width:1px;background:var(--k)}
.tl .axis{position:absolute;bottom:0;left:0;right:0;height:15px;
          font-family:var(--mono);font-size:10px;color:var(--faint)}
.tl .axis span{position:absolute;top:2px;transform:translateX(-50%)}
.tl .axis i{position:absolute;bottom:0;width:1px;height:5px;background:var(--rule-2)}
.log{font-family:var(--mono);font-size:12px;min-height:52px;max-height:150px;
     overflow-y:auto;border:1px solid var(--rule-2);background:#fff;
     padding:8px 10px;color:var(--faint)}
.log div{padding:2px 0;border-bottom:1px solid #EEF2EE}
.log .h{color:var(--hit)}
.log .m{color:var(--warn)}
.big{font-family:var(--mono);font-size:26px;font-variant-numeric:tabular-nums;
     letter-spacing:-.01em}
.kpi{border:1px solid var(--rule-2);background:#fff;padding:12px 14px}
.kpi .lab{font-family:var(--mono);font-size:11.5px;color:var(--faint);margin-bottom:4px}
.kpi.win{border-color:var(--hit);background:rgba(44,122,87,.06)}
.kpi.bad{border-color:var(--warn)}


/* ======================================================================
   index.html
   ====================================================================== */

.masthead{padding:64px 0 4px}
.masthead pre{font-family:var(--mono);font-size:13px;line-height:1.45;
              overflow-x:auto;-webkit-overflow-scrolling:touch;
              color:var(--rule);white-space:pre;margin:0;
              background:none;border:0;padding:0 0 4px}
.masthead pre b{color:var(--ink);font-weight:600}
.masthead pre i{color:var(--faint);font-style:normal}
.masthead pre u{color:var(--soft);font-style:normal;text-decoration:none}
.masthead pre em{color:var(--k);font-style:normal}

.doc{display:block;border:1px solid var(--rule-2);border-left:4px solid var(--rule);
     background:var(--card);padding:20px 22px;margin-bottom:16px;color:inherit;
     border-bottom:1px solid var(--rule-2)}
.doc:hover,.doc:focus-visible{border-left-color:var(--q);background:#fff}
.doc .top{display:flex;justify-content:space-between;gap:14px;align-items:baseline;
          flex-wrap:wrap;margin-bottom:8px}
.doc .name{font-family:var(--mono);font-size:16px;font-weight:600;color:var(--q)}
.doc .meta{font-family:var(--mono);font-size:11.5px;color:var(--faint);white-space:nowrap}
.doc .q{font-size:17px;margin:0 0 12px}
.doc ul{margin:0;padding-left:19px;font-size:15px;color:var(--soft)}
.doc li{margin-bottom:5px}
.doc .live{font-family:var(--mono);font-size:11.5px;color:var(--k);margin-top:12px}


/* ======================================================================
   Utilities — these exist so no HTML file carries a style="" attribute.
   Everything visual lives in this file.
   ====================================================================== */

/* semantic colour marks (cache invalidation table, Q/K/V labels) */
.ok   {color:var(--hit)}
.no   {color:var(--warn)}
.c-q  {color:var(--q)}
.c-k  {color:var(--k)}
.c-v  {color:var(--v)}
.c-soft{color:var(--soft)}
.c-faint{color:var(--faint)}

/* small text blocks */
.cap      {font-family:var(--mono);font-size:12.5px;color:var(--soft);margin:16px 0 6px}
.cap.tight{margin:20px 0 6px}
.stamp    {font-family:var(--mono);font-size:12px;color:var(--faint);margin-top:40px}

/* spacing helpers */
.mt-0{margin-top:0}    .mt-1{margin-top:14px} .mt-2{margin-top:16px} .mt-3{margin-top:34px}
.mb-0{margin-bottom:0} .mb-1{margin-bottom:10px} .mb-2{margin-bottom:14px}
.mb-3{margin-bottom:18px}
.m-0{margin:0}
.controls{margin:16px 0 0}
.steps-box{margin:16px 0 18px}
.row.tight{margin:0;gap:6px}
.grid2.gap-lg{gap:18px;margin-bottom:16px}
.grid2.gap-sm{gap:14px;margin-bottom:12px}
.right{text-align:right}
.bare{border:0}

/* table column proportions, by table role */
table.two-caches th:nth-child(1){width:24%}
table.two-caches th:nth-child(2){width:38%}
table.invalidate th:nth-child(1){width:30%}
table.invalidate th:nth-child(2),
table.invalidate th:nth-child(3),
table.invalidate th:nth-child(4){width:9%}
table.minimums  th:nth-child(1){width:22%}
table.glossary  td:nth-child(1){width:32%}
table.failures  th:nth-child(1){width:31%}
table.routing   th:nth-child(1){width:52%}
table.full{width:100%}

/* free-text input used by the tokeniser widget */
.textin{flex:1;min-width:220px;font-family:var(--mono);font-size:13px;
        padding:7px 9px;border:1px solid var(--rule);border-radius:2px;background:#fff}

/* llms.html: training-step readout and context-window bar segments */
.trainstage{font-size:13.5px;line-height:2.05;min-height:132px}
.ctxbar .seg-sys  {flex:14;background:var(--q)}
.ctxbar .seg-proj {flex:9; background:var(--v)}
.ctxbar .seg-files{flex:36;background:var(--k)}
.ctxbar .seg-conv {flex:33;background:var(--hit)}
.ctxbar .seg-head {flex:8; background:var(--soft)}
.sw-old{background:#fff}
.sw-new{background:rgba(163,78,25,.30)}