:root{
  --bg:#f9f9f7; --surface:#fcfcfb; --band:#f2f1ed; --ink:#0b0b0b; --ink2:#52514e; --muted:#898781;
  --rule:#e3e2dd; --grid:#ecebe7; --accent:#2a78d6; --accent-soft:#e3eefb; --warn:#eb6834; --ref:#52514e; --gold:#b8860b;
  --code-bg:#f0efec;
  --serif: "Iowan Old Style","Charter","Source Serif Pro","Georgia",serif;
  --sans: system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono: ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0d0d0d; --surface:#1a1a19; --band:#141413; --ink:#fff; --ink2:#c3c2b7; --muted:#898781;
    --rule:#2c2c2a; --grid:#262624; --accent:#3987e5; --accent-soft:#16263a; --warn:#d95926; --ref:#c3c2b7; --gold:#e0b44c;
    --code-bg:#1f1f1d; color-scheme: dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0d0d0d; --surface:#1a1a19; --band:#141413; --ink:#fff; --ink2:#c3c2b7; --muted:#898781;
  --rule:#2c2c2a; --grid:#262624; --accent:#3987e5; --accent-soft:#16263a; --warn:#d95926; --ref:#c3c2b7; --gold:#e0b44c;
  --code-bg:#1f1f1d; color-scheme: dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:64px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
@media(min-width:720px){.wrap{padding:0 32px}}
a{color:var(--accent)}
code{font-family:var(--mono);font-size:.88em}
.skip{position:absolute;left:-9999px}.skip:focus{left:8px;top:8px;background:var(--surface);padding:6px 10px;z-index:9}

.top{position:sticky;top:0;z-index:5;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}
.top-in{display:flex;align-items:center;gap:20px;height:52px}
.brand{font:600 17px var(--serif);color:var(--ink);text-decoration:none;letter-spacing:.01em}
.top nav{display:flex;gap:18px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.top nav a{color:var(--ink2);text-decoration:none;font-size:14px;white-space:nowrap}
.top nav a:hover{color:var(--ink)}
.theme-btn{border:1px solid var(--rule);background:var(--surface);color:var(--ink);border-radius:8px;width:34px;height:30px;cursor:pointer;flex:none}
@media(max-width:640px){.top nav a:nth-child(n+4){display:none}.top nav{gap:12px}}

.hero{padding:64px 16px 40px}
@media(min-width:720px){.hero{padding:64px 32px 44px}}
.eyebrow{font:500 13px var(--mono);color:var(--muted);margin:0 0 14px;letter-spacing:.02em}
h1{font:600 clamp(34px,6vw,58px)/1.06 var(--serif);margin:0 0 18px;letter-spacing:-.015em;max-width:21ch}
.lede{font-size:clamp(17px,2.1vw,20px);color:var(--ink2);max-width:62ch;margin:0 0 26px}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:40px}
.btn{display:inline-block;padding:8px 16px;border:1px solid var(--rule);border-radius:999px;color:var(--ink);text-decoration:none;font-size:15px;background:var(--surface)}
.btn:hover{border-color:var(--ink2)}
.btn.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule);border-radius:12px;overflow:hidden;margin:0}
@media(min-width:820px){.stats{grid-template-columns:repeat(3,1fr)}}
.stats>div{background:var(--surface);padding:16px 18px}
.stats dt{font-size:13px;color:var(--ink2);order:2}
.stats dd{margin:0;font:600 32px/1.1 var(--serif);font-variant-numeric:tabular-nums}
.stats dd small{font-size:18px;color:var(--ink2);font-weight:500}
.stats>div>span{display:block;font-size:12.5px;color:var(--muted)}

section{padding:56px 0}
.band{background:var(--band);border-block:1px solid var(--rule)}
h2{font:600 clamp(24px,3.2vw,32px)/1.2 var(--serif);margin:0 0 10px;letter-spacing:-.01em}
h3{font:600 17px/1.35 var(--sans);margin:0 0 6px}
.sub{color:var(--ink2);max-width:70ch;margin:0 0 24px}
.note{color:var(--muted);font-size:14px;max-width:80ch}

/* diagram */
.diagram{margin:8px 0 28px;background:var(--surface);border:1px solid var(--rule);border-radius:14px;padding:16px;overflow-x:auto}
.diagram svg{width:100%;height:auto;display:block}
.diagram svg.vert{display:none;max-width:420px;margin:0 auto}
@media(max-width:640px){.diagram svg.horiz{display:none}.diagram svg.vert{display:block}}
.diagram figcaption{font-size:13.5px;color:var(--muted);margin-top:8px}
.d-step{font:600 14px var(--sans);fill:var(--ink)}
.d-box{fill:var(--bg);stroke:var(--rule);stroke-width:1.2}
.d-box-cue{stroke:var(--accent);stroke-width:1.6}
.d-mono{font:500 11px var(--mono);fill:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.d-txt{font:14px var(--serif);fill:var(--ink)}
.d-lab{font:600 13px var(--sans);fill:var(--ink)}
.d-code{font:600 14px var(--mono);fill:var(--ink)}
.d-code-cue{fill:var(--accent)}
.d-line{fill:none;stroke:var(--muted);stroke-width:1.4}
.d-arrowhead{fill:var(--muted)}
.d-foot{font:13px var(--sans);fill:var(--ink2)}
.d-bar{fill:var(--muted)}.d-bar-cue{fill:var(--accent)}

/* pairs */
.pairs{display:grid;gap:16px}
@media(min-width:820px){.pairs{grid-template-columns:1fr 1fr}}
.pair{background:var(--surface);border:1px solid var(--rule);border-radius:14px;padding:18px}
.pair .t{font:16px/1.45 var(--serif);margin:0 0 12px;color:var(--ink)}
.var{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid var(--rule);border-radius:10px;margin-bottom:8px}
.var.cue{border-color:color-mix(in srgb,var(--accent) 55%,var(--rule));background:var(--accent-soft)}
.var b{display:block;font-size:14.5px}
.var code{color:var(--ink2)}
.var.cue code{color:var(--accent)}
.play{flex:none;width:38px;height:38px;border-radius:50%;border:1px solid var(--rule);background:var(--bg);color:var(--ink);cursor:pointer;font-size:13px}
.play.on{background:var(--ink);color:var(--bg)}
.res{font-size:14px;color:var(--ink2);margin:10px 0 0}

/* leaderboard */
.controls{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:14px}
.seg{border:1px solid var(--rule);background:var(--surface);color:var(--ink2);padding:6px 14px;border-radius:8px;cursor:pointer;font-size:14px}
.seg.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.filter{margin-left:auto;font-size:14px;color:var(--ink2);display:flex;gap:6px;align-items:center}
.filter select{background:var(--surface);color:var(--ink);border:1px solid var(--rule);border-radius:6px;padding:4px 6px;font:inherit}
.chart-wrap{background:var(--surface);border:1px solid var(--rule);border-radius:14px;padding:12px 8px}
.chart-wrap svg{display:block;width:100%;height:auto}
.legend{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--ink2);margin:10px 0}
.lg{display:inline-block;width:10px;height:10px;margin-right:6px;vertical-align:-1px;border-radius:50%}
.lg.pass{background:var(--accent)}
.lg.ns{border:1.6px solid var(--muted)}
.lg.below{border-radius:0;width:0;height:0;border-left:6px solid transparent;border-right:6px solid transparent;border-top:10px solid var(--warn)}
.c-axis{font:11.5px var(--sans);fill:var(--muted)}
.c-lab{font:12.5px var(--sans);fill:var(--ink)}
.c-lab-ref{font:italic 12.5px var(--sans);fill:var(--ink2)}
.c-tag{font:10.5px var(--mono);fill:var(--muted)}
.c-grid{stroke:var(--grid)}
.c-zero{stroke:var(--ink2);stroke-dasharray:4 3}
.c-ci{stroke:var(--muted);stroke-width:2;stroke-linecap:round}
.c-ci.pass{stroke:var(--accent)}
.c-ci.below{stroke:var(--warn)}
.c-pass{fill:var(--accent);stroke:var(--surface);stroke-width:2}
.c-ns{fill:var(--surface);stroke:var(--muted);stroke-width:1.8}
.c-below{fill:var(--warn);stroke:var(--surface);stroke-width:1.5}
.c-ref{fill:none;stroke:var(--ink2);stroke-width:1.8}
.c-refsq{fill:var(--ref)}
.c-head{font:600 12px var(--sans);fill:var(--ink2);text-transform:uppercase;letter-spacing:.05em}
.c-diag{stroke:var(--ink2);stroke-dasharray:4 3}
.c-bar{fill:var(--accent)}
.c-bar2{fill:var(--muted)}
.c-val{font:600 12.5px var(--sans);fill:var(--ink);font-variant-numeric:tabular-nums}
.hit{fill:transparent;cursor:default}
.row-hover rect.hl{fill:var(--accent-soft)}

.table-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--rule);border-radius:14px}
table{border-collapse:collapse;width:100%;font-size:14px;font-variant-numeric:tabular-nums}
th,td{padding:8px 12px;text-align:left;border-bottom:1px solid var(--rule);white-space:nowrap}
th{font-weight:600;color:var(--ink2);font-size:12.5px;position:sticky;top:0;background:var(--surface)}
th button{all:unset;cursor:pointer}
td.num,th.num{text-align:right}
tr.ref td{color:var(--ink2);font-style:italic}
tr.sep td{background:var(--band);font-weight:600;color:var(--ink2);font-style:normal;font-size:12.5px;text-transform:uppercase;letter-spacing:.05em}
.vd{font-size:12.5px;padding:2px 8px;border-radius:999px;border:1px solid var(--rule)}
.vd.passes{background:var(--accent-soft);color:var(--accent);border-color:transparent}
.vd.below{color:var(--warn)}
.ci{color:var(--muted);font-size:12.5px}

/* findings */
.finding{display:grid;gap:20px;padding:28px 0;border-top:1px solid var(--rule)}
.finding:first-of-type{border-top:0}
@media(min-width:900px){.finding{grid-template-columns:5fr 7fr;gap:36px;align-items:start}}
.fnum{font:500 12.5px var(--mono);color:var(--muted);margin:0 0 6px}
.finding h3{font:600 22px/1.25 var(--serif);margin-bottom:10px}
.finding p{color:var(--ink2)}
.finding figure{margin:0}
.finding figcaption{font-size:13.5px;color:var(--muted);margin-top:8px}

.grid3{display:grid;gap:20px}
@media(min-width:820px){.grid3{grid-template-columns:repeat(3,1fr)}}
.grid3 p{color:var(--ink2);margin:0}

.code{position:relative;background:var(--code-bg);border:1px solid var(--rule);border-radius:12px}
.code pre{margin:0;padding:16px;overflow-x:auto;font:13px/1.55 var(--mono)}
.copy{position:absolute;top:8px;right:8px;border:1px solid var(--rule);background:var(--surface);color:var(--ink2);border-radius:6px;font-size:12px;padding:3px 8px;cursor:pointer}

.tip{position:fixed;z-index:20;pointer-events:none;background:var(--ink);color:var(--bg);font-size:12.5px;line-height:1.45;padding:8px 10px;border-radius:8px;max-width:280px;box-shadow:0 4px 16px rgba(0,0,0,.18)}
.tip b{font-weight:600}
.foot{color:var(--muted);font-size:13px;padding:28px 16px 48px}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}

/* ---- final-page additions ---- */
.meta{font-size:13px;color:var(--muted);margin:14px 0 0}
.stats>div.hi{background:var(--accent-soft)}
.stats>div.hi dd{color:var(--accent)}
.hero{padding-bottom:48px}
.howto{background:var(--surface);border:1px solid var(--rule);border-left:3px solid var(--accent);border-radius:10px;padding:12px 16px;margin:0 0 18px;max-width:86ch}
.howto p{margin:0;color:var(--ink2);font-size:15px}
.howto b{color:var(--ink)}
.filter.chk{margin-left:0;cursor:pointer}
.view-chart #holmWrap,.view-chart .tbl-only{display:none}
.table-wrap{margin-bottom:12px}
table caption{caption-side:top;text-align:left;font-size:13px;color:var(--ink2);padding:10px 12px 2px;font-weight:600}
th small{display:block;font-weight:400;font-size:11px;color:var(--muted);white-space:nowrap}
th{vertical-align:bottom}
td.c-name{font-weight:500}
td.c-name sup a{text-decoration:none;font-size:11px;margin-left:2px;font-weight:600}
tr.is-pass td.c-name{color:var(--ink)}
td .v{font-weight:600}
.vd.pass{background:var(--accent-soft);color:var(--accent);border-color:transparent}
.vd.below{color:var(--warn);border-color:color-mix(in srgb,var(--warn) 45%,var(--rule))}
.vd.ns{color:var(--ink2)}
.mbar{position:relative;display:inline-block;width:72px;height:8px;margin-left:8px;vertical-align:middle;background:var(--grid);border-radius:4px}
.mbar i{position:absolute;left:0;top:0;bottom:0;background:var(--accent);opacity:.55;border-radius:4px}
.mbar b{position:absolute;top:-3px;bottom:-3px;width:0;border-left:2px dashed var(--muted)}
.mbar b.t-v{border-left:2px solid var(--gold)}
.lg.tick{width:0;height:12px;border-radius:0;border-left:2px dashed var(--muted);margin-right:8px}
.lg.tick.vol{border-left:2px solid var(--gold)}
.c-p{display:none}
.show-p .c-p{display:table-cell}
.tsub{margin:22px 0 4px}
.swipe{display:none;font-size:12.5px;color:var(--muted);margin:0 0 8px}
.fn{list-style:none;padding:0;margin:8px 0 22px;font-size:13.5px;color:var(--ink2);max-width:90ch}
.fn li{margin:4px 0;padding-left:18px;text-indent:-18px}
.fn li b{color:var(--accent);display:inline-block;width:18px;text-indent:0}
.fn .fname{color:var(--ink);font-weight:500}
.refs h3{font:600 18px var(--serif);margin:8px 0 8px}
.refs dl{margin:0 0 10px}
.refs dt{font-weight:600;font-size:15px;margin-top:10px}
.refs dd{margin:2px 0 0;color:var(--ink2);font-size:14.5px;max-width:86ch}
.linkbtn{all:unset;color:var(--accent);cursor:pointer;text-decoration:underline;text-underline-offset:2px}
.gloss{display:grid;gap:4px 28px;margin:0}
@media(min-width:820px){.gloss{grid-template-columns:240px 1fr}}
.gloss dt{font-weight:600;padding-top:10px}
.gloss dt span{display:block;font-weight:400;font-size:12.5px;color:var(--muted);font-family:var(--mono)}
.gloss dd{margin:0;padding-top:10px;color:var(--ink2);border-top:1px solid var(--rule)}
@media(min-width:820px){.gloss dt{border-top:1px solid var(--rule)}}
.c-err{stroke:var(--ink);stroke-width:1.5}
.c-fn{font-size:9.5px;fill:var(--accent);font-weight:600}
@media(max-width:640px){
  .hide-sm{display:none}
  .c-vendor,.c-mode,.c-gain,.c-probe,.c-both,.show-p .c-p{display:none}
  td.c-credit .ci,.mbar{display:none}
  th,td{padding:8px 8px;white-space:normal}
  th small{white-space:normal}
  .swipe{display:block}
  .stats dd{font-size:26px}
  .table-wrap table{min-width:0}
}
.stats>div{display:flex;flex-direction:column}
.stats dd{order:0}.stats dt{order:1;margin-top:4px;color:var(--ink)}.stats>div>span{order:2}
.hero{padding-top:44px}
#leaderboard>.wrap{max-width:1280px}
#leaderboard th,#leaderboard td{padding:7px 9px}
.mbar{width:56px;margin-left:6px}
@media(max-width:640px){#holmWrap{display:none}}

.stats>div:last-child{grid-column:1/-1}
@media(min-width:820px){.stats>div:last-child{grid-column:auto}}

/* ---- compact top (Oct 2): smaller hero, stat list, playable pair beside it ---- */
.hero{padding:22px 16px 18px}
@media(min-width:720px){.hero{padding:26px 32px 18px}}
h1{font:600 clamp(24px,3.3vw,34px)/1.15 var(--serif);margin:0 0 12px;letter-spacing:-.01em;max-width:none}
.hero-grid{display:grid;gap:16px}
@media(min-width:880px){.hero-grid{grid-template-columns:minmax(0,1fr) 400px;gap:28px;align-items:start}}
.lede{font-size:17px;line-height:1.45;color:var(--ink);max-width:60ch;margin:0 0 4px}
.lede-sub{font-size:14px;line-height:1.5;color:var(--ink2);max-width:66ch;margin:0 0 12px}
.actions{gap:8px;margin-bottom:14px}
.btn{padding:4px 12px;font-size:13.5px}
.stats{display:block;background:none;border:0;border-radius:0;overflow:visible}
.stats>div{display:grid;grid-template-columns:96px minmax(0,1fr);column-gap:12px;align-items:baseline;background:none;padding:7px 0;border-top:1px solid var(--rule)}
.stats>div:last-child{border-bottom:1px solid var(--rule)}
.stats>div.hi{background:none}
.stats dd{grid-column:1;grid-row:1 / span 2;margin:0;font:600 24px/1.15 var(--serif);white-space:nowrap}
.stats dd small{font-size:15px}
.stats dt{grid-column:2;grid-row:1;margin:0;font-size:14px;line-height:1.35;color:var(--ink);font-weight:500}
.stats>div>span{grid-column:2;grid-row:2;font-size:12.5px;line-height:1.35;color:var(--muted)}
.meta{font-size:12.5px;margin:12px 0 0}
.mini{background:var(--surface);border:1px solid var(--rule);border-radius:12px;padding:12px 14px}
.mini-k{font:600 12px var(--sans);text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 6px}
.mini .t{font:15px/1.4 var(--serif);margin:0 0 8px}
.mini .var{padding:6px 10px;margin-bottom:6px;gap:10px}
.mini .var b{font-size:13.5px}
.mini .var code{font-size:12.5px}
.mini .play{width:32px;height:32px;font-size:12px}
.mini .res{font-size:13px;line-height:1.45;margin:8px 0 4px}
.mini .res b{color:var(--ink);font-weight:600}
.more{font-size:13px;text-decoration:none}
.more:hover{text-decoration:underline}
.pairs-k{color:var(--ink2);font-size:14px;margin:0 0 10px}
@media(min-width:820px){.pairs>.pair:last-child:nth-child(odd){grid-column:1/-1}}
#leaderboard{padding-top:26px}
#leaderboard h2{font-size:clamp(21px,2.4vw,26px);margin-bottom:8px}
.howto{padding:8px 12px;margin:0 0 12px;border-radius:8px}
.howto p{font-size:14px}
.howto .pass-word{color:var(--accent)}
.howto details{margin-top:2px}
.howto summary{cursor:pointer;font-size:13px;color:var(--accent);width:max-content;max-width:100%}
.howto details p{margin-top:6px;font-size:13.5px}
@media(max-width:640px){.stats dd{font-size:22px}}
.stats{display:grid;grid-template-columns:max-content minmax(0,1fr);column-gap:14px}
.stats>div{grid-column:1 / -1;grid-template-columns:subgrid;column-gap:14px}
.mini .var>div{display:flex;flex-wrap:wrap;align-items:baseline;gap:0 10px}
.mini .var b{display:inline}
.stats>div:last-child{grid-column:1 / -1}

/* ---- diagram at the top (Oct 2): one content width, playable diagram in the hero ---- */
.wrap,#leaderboard>.wrap{max-width:1280px}
.hero{padding-bottom:16px}
h1{margin-bottom:6px}
.lede{font:600 clamp(17px,1.9vw,20px)/1.3 var(--serif);color:var(--ink2);margin:0 0 4px;max-width:none}
.lede-sub{max-width:100ch;margin-bottom:10px}
.actions{margin-bottom:14px}
.hero-grid{display:grid;gap:14px}
@media(min-width:960px){.hero-grid{grid-template-columns:minmax(0,1fr) 340px;gap:28px;align-items:start}}
.stats>div:first-child{border-top:0}
@media(min-width:960px){.stats{margin-top:20px}.stats>div:first-child{border-top:1px solid var(--rule)}}
.xdiag{margin:0;background:var(--surface);border:1px solid var(--rule);border-radius:12px;padding:12px 14px 10px}
.xd-grid{display:grid;grid-template-columns:minmax(0,.95fr) 32px minmax(0,1.4fr) 22px minmax(0,.85fr);
  grid-template-rows:minmax(60px,auto) minmax(60px,auto);grid-template-areas:"tr fk va a1 ga" "tr fk vb a2 gb";column-gap:0;row-gap:8px;align-items:stretch}
.xd-box{background:var(--bg);border:1px solid var(--rule);border-radius:10px;padding:7px 10px;min-width:0}
.xd-box.cue{border-color:var(--accent);border-width:1.5px;background:var(--accent-soft)}
.xd-k{display:block;font:500 10.5px var(--mono);color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.xd-ab{display:none}
.xd-tr{grid-area:tr;align-self:center}
.xd-q{display:block;font:14.5px/1.4 var(--serif);color:var(--ink);margin-top:2px}
.xd-fork{grid-area:fk;width:100%;height:100%;display:block}
.xd-fork path{fill:none;stroke:var(--muted);stroke-width:1.4;vector-effect:non-scaling-stroke}
.xd-va{grid-area:va}.xd-vb{grid-area:vb}.xd-ga{grid-area:ga}.xd-gb{grid-area:gb}
.xd-var{display:flex;align-items:center;gap:10px;padding:6px 10px}
.xd-var .play{width:34px;height:34px;font-size:12px}
.xd-vt{flex:1;min-width:0}
.xd-vt b{display:block;font-size:13px;font-weight:600;line-height:1.25}
.xd-wave{display:block;width:100%;height:22px;margin-top:3px}
.xd-wave rect{fill:var(--muted);opacity:.55}
.xd-vb .xd-wave rect{fill:var(--accent)}
.xd-wave rect.p{opacity:1;fill:var(--ink)}
.xd-vb .xd-wave rect.p{fill:var(--accent);opacity:1}
.xd-vb .xd-wave rect:not(.p){opacity:.4}
.xd-arr{align-self:center;justify-self:center;color:var(--muted);font-size:15px}
.xd-a1{grid-area:a1}.xd-a2{grid-area:a2}
.xd-gold{display:flex;flex-direction:column;justify-content:center}
.xd-gold code{font:600 13.5px var(--mono);color:var(--ink);overflow-wrap:anywhere}
.xd-gold.cue code{color:var(--accent)}
.xdiag .res{font-size:13.5px;line-height:1.45;margin:10px 0 2px;color:var(--ink2)}
.xdiag .res b{color:var(--ink);font-weight:600}
.xdiag .more{white-space:nowrap}
.xdiag figcaption{font-size:12px;color:var(--muted)}
@media(max-width:700px){
  .xd-grid{grid-template-columns:minmax(0,1fr);grid-template-rows:none;row-gap:6px;
    grid-template-areas:"tr" "va" "vb" "ga" "gb"}
  .xd-fork,.xd-arr{display:none}
  .xd-va,.xd-ga{margin-top:6px}
  .xd-var{min-height:56px}
  .xd-ab{display:inline}
  .xd-gold{flex-direction:row;justify-content:flex-start;align-items:baseline;gap:10px}
}

/* ---- More examples (Oct 2): seven compact pair cards with cue-kind tags ---- */
.pairs.compact{gap:12px}
@media(min-width:760px){.pairs.compact{grid-template-columns:1fr 1fr}}
@media(min-width:820px){.pairs.compact>.pair:last-child:nth-child(odd){grid-column:auto}}
.pairs.compact .pair{padding:12px 14px;border-radius:12px;display:flex;flex-direction:column}
.pairs.compact .pair header{display:flex;flex-wrap:wrap;align-items:center;gap:4px 10px;margin:0 0 4px}
.pairs.compact .pair h3{font:600 15px/1.3 var(--sans);margin:0;color:var(--ink)}
.tag{display:inline-block;font:500 11px/1.5 var(--mono);text-transform:uppercase;letter-spacing:.05em;color:var(--accent);background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 35%,var(--rule));border-radius:999px;padding:0 8px}
.pairs.compact .pair .t{font:14.5px/1.4 var(--serif);margin:0 0 8px}
.pairs.compact .var{padding:5px 10px;gap:10px;margin-bottom:6px;border-radius:8px}
.pairs.compact .var>div{display:flex;flex-wrap:wrap;align-items:baseline;gap:0 10px;min-width:0}
.pairs.compact .var b{display:inline;font-size:13.5px;font-weight:600}
.pairs.compact .var code{font-size:12.5px;overflow-wrap:anywhere}
.pairs.compact .play{width:30px;height:30px;font-size:11px}
.pairs.compact .res{font-size:13px;line-height:1.45;margin:4px 0 0}

/* ---- hero title line (Oct 2): one small line above the diagram replaces the subtitle and the numbered column labels ---- */
.xd-title{margin:0 0 -6px;font:600 18px/1.3 var(--serif);color:var(--ink)}
@media(min-width:960px){
  .hero-grid{grid-template-areas:"ttl ." "fig st";row-gap:8px}
  .xd-title{grid-area:ttl;margin:0}
  .hero-grid>.xdiag{grid-area:fig}
  .hero-grid>.stats{grid-area:st;margin-top:0}
}

/* ---- readability pass (Oct 2): AA contrast, type floor, prose measure, tap targets, spacing scale ---- */
/* Text colours that failed WCAG AA: muted 3.2-3.5:1 -> >=4.6:1; accent text 3.8-4.3:1 -> >=4.8:1; warn 2.8-3.1:1 -> >=4.5:1 */
:root{--muted:#666560;--accent:#1d63bb;--warn:#b9461a}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--muted:#9c9a93;--accent:#5a9cf0;--warn:#ec7a4b}}
:root[data-theme="dark"]{--muted:#9c9a93;--accent:#5a9cf0;--warn:#ec7a4b}
/* spacing scale: 4 8 12 16 24 32 48 */
section{padding:48px 0}
#leaderboard{padding-top:40px}
h2{margin-bottom:12px}
/* measure: ~65-85 characters per line for prose (system sans averages ~0.45em per character) */
.lede-sub,.sub,.gloss dd,.refs dd,.howto,.note,.fn,.finding figcaption,.xdiag .res,.xdiag figcaption{max-width:38em}
.finding .ftext p{max-width:62ch}
/* hero */
.hero{padding:32px 16px 32px}
@media(min-width:720px){.hero{padding:36px 32px 36px}}
h1{margin-bottom:12px}
.lede-sub{font-size:16px;line-height:1.55;margin-bottom:16px}
.actions{margin-bottom:28px}
.btn{padding:7px 16px;font-size:15px}
.xd-title{font-size:19px}
.xd-k{font-size:11.5px}
.xd-q{font-size:15.5px;line-height:1.45}
.xd-vt b{font-size:14px;line-height:1.35}
.xd-gold code{font-size:14px}
.xdiag{padding:14px 16px 12px}
.xdiag .res{font-size:15px;line-height:1.5;margin-top:12px}
.xdiag figcaption{font-size:13px;line-height:1.5;margin-top:6px}
.stats>div{padding:10px 0}
.stats dt{font-size:15px;line-height:1.4}
.stats>div>span{font-size:13.5px;line-height:1.45}
.meta{font-size:13px;margin-top:20px}
/* leaderboard */
.howto{padding:12px 16px;margin-bottom:16px}
.howto p{font-size:15px;line-height:1.55}
.howto summary{font-size:14px;padding:4px 0}
.howto details p{font-size:14.5px;line-height:1.55}
.controls{gap:10px;margin-bottom:16px}
.seg{font-size:15px;padding:7px 16px}
.filter{font-size:15px}
.filter select{padding:5px 8px}
table{font-size:14.5px}
#leaderboard th,#leaderboard td{padding:10px 9px}
#leaderboard .c-verdict{padding-left:6px;padding-right:6px}
th{font-size:13.5px}
th small{font-size:12px;line-height:1.35}
table caption{font-size:14px;padding:12px 12px 4px}
.ci{font-size:13px}
.vd{font-size:13px;padding:2px 9px;white-space:nowrap;display:inline-block;line-height:1.5}
td.c-name sup a{font-size:12px}
.legend{font-size:14px;gap:8px 20px;margin:12px 0 16px}
.swipe{font-size:13.5px}
.fn{font-size:14.5px;line-height:1.55;margin-bottom:28px}
.fn li{margin:6px 0}
.refs h3{font-size:19px;margin:8px 0 4px}
.refs dt{font-size:15.5px;margin-top:16px}
.refs dd{font-size:15px;line-height:1.55;margin-top:4px}
.linkbtn{padding:2px 0}
.tsub{margin:32px 0 6px}
#lbTable .note{color:var(--ink2);font-size:15px;line-height:1.55}
/* examples */
.pairs.compact{gap:16px}
.pairs.compact .pair{padding:16px 18px}
.pairs.compact .pair header{margin-bottom:8px}
.pairs.compact .pair h3{font-size:16px}
.tag{font-size:12px;padding:1px 9px}
.pairs.compact .pair .t{font-size:16px;line-height:1.45;margin-bottom:12px}
.pairs.compact .var{padding:6px 12px;margin-bottom:8px}
.pairs.compact .var b{font-size:14.5px}
.pairs.compact .var code{font-size:13.5px}
.pairs.compact .play{width:36px;height:36px;font-size:12px}
.pairs.compact .res{font-size:14.5px;line-height:1.55;margin-top:8px}
.note{font-size:14.5px;line-height:1.55}
/* findings, glossary, code */
.finding{padding:32px 0}
.fnum{font-size:13px;margin-bottom:8px}
.finding h3{margin-bottom:12px}
.finding figcaption{font-size:14px;line-height:1.55;margin-top:10px}
.c-axis{font-size:12px}
.c-lab-ref,#errChart .c-axis{paint-order:stroke;stroke:var(--surface);stroke-width:4px;stroke-linejoin:round}
.gloss{gap:0 32px}
.gloss dt,.gloss dd{padding-top:14px;padding-bottom:4px}
.gloss dt span{font-size:13px;margin-top:2px}
.gloss dd{line-height:1.6}
.code pre{font-size:13.5px}
.copy{font-size:13px;padding:5px 10px}
.foot{font-size:14px}
/* mobile: tap targets >=40px, no clipped nav item */
@media(max-width:640px){
  .top nav a{padding:10px 0}
  .theme-btn{width:40px;height:40px}
  .btn{padding:10px 16px}
  .seg{padding:10px 16px}
  .filter select{min-height:40px}
  .howto summary{padding:9px 0}
  .xd-var .play,.pairs.compact .play{width:40px;height:40px}
  .copy{padding:10px 12px;min-height:40px}
  .seg{min-height:40px}
  .brand{padding:8px 0}
  .linkbtn{padding:9px 0;display:inline-block}
  #leaderboard th,#leaderboard td{padding:10px 8px}
  .stats dd{font-size:24px}
}
@media(max-width:440px){.top nav a:nth-child(n+3){display:none}}
.nw,.xd-k{white-space:nowrap}
@media(max-width:700px){.xd-gold code{min-width:0}}

/* ---- layout fixes (Oct 2, final): full-width how-to, aligned tables, notes beside reference rows ---- */
.howto{max-width:none}
.howto details p{max-width:80ch}
#lbTable .note.tnote{max-width:none;margin:0 0 12px}
/* both leaderboard tables share one column grid, so the audio-only rows line up with the main table */
@media(min-width:1100px){
  #lbTable table{table-layout:fixed}
  #lbTable th{white-space:normal}
  #lbTable th small{white-space:normal}
  #lbTable th.c-name{width:20%}
  #lbTable th.c-vendor{width:11.5%}
  #lbTable th.c-mode{width:6.5%}
  #lbTable th.c-credit{width:16%}
  #lbTable th.c-verdict{width:12%}
  #lbTable th.c-gain{width:13%}
  #lbTable th.c-p{width:6%}
  #lbTable th.c-probe{width:11%}
  #lbTable th.c-both{width:10%}
}
.after-tables{display:grid;gap:8px 48px;margin-top:8px}
.after-tables .fn{margin:0;max-width:none}
.after-tables .fn-col{min-width:0}
.after-tables .refs{min-width:0}
.after-tables .refs h3{margin-top:0}
.after-tables .refs dt:first-of-type{margin-top:4px}
.after-tables .refs dd{max-width:none}
#refTable th{white-space:normal}
@media(min-width:960px){
  .after-tables{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start}
  .after-tables .fn{padding-right:0}
}
.fn-h{font:600 19px var(--serif);margin:0 0 4px}
/* hero: one-line scenario label under the diagram */
.xdiag figcaption.xd-scn{font-size:14px;line-height:1.5;color:var(--ink2);margin-top:10px;max-width:none}

/* ---- layout tightening (Oct 2, title A): text + stats side by side, diagram full width, one-line how-to ---- */
.hero{padding:28px 16px 24px}
@media(min-width:720px){.hero{padding:32px 32px 24px}}
.hero-head{display:grid;gap:20px}
@media(min-width:960px){.hero-head{grid-template-columns:minmax(0,1fr) 430px;gap:40px;align-items:start}}
.kicker{font:600 13px/1.4 var(--sans);text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin:0 0 6px}
h1{font:600 clamp(30px,3.1vw,40px)/1.12 var(--serif);margin:0 0 8px;letter-spacing:-.015em;max-width:none}
.subtitle{font:500 clamp(17px,1.7vw,20px)/1.4 var(--serif);color:var(--ink2);margin:0 0 12px}
.lede-sub{font-size:16px;line-height:1.55;color:var(--ink2);max-width:none;margin:0 0 16px}
.actions{margin-bottom:0}
.hero-head .stats{margin:0}
@media(min-width:960px){.hero-head .stats{margin-top:4px}.hero-head .stats>div:first-child{border-top:1px solid var(--rule)}}
.hero-head .stats>div{padding:7px 0}
.hero-diag{margin-top:24px}
.hero-diag .xd-title{margin:0 0 8px}
.meta{margin-top:12px}
/* how-to: key line and the "How to read" toggle share one line; the expanded text opens below */
.howto{position:relative}
.howto details{margin-top:0}
.howto summary{color:var(--accent)}
@media(min-width:900px){
  .howto{padding:8px 16px;padding-right:220px}
  .howto summary{position:absolute;right:16px;top:8px;padding:0;line-height:1.55;font-size:15px}
  .howto details[open] p{margin-top:8px}
}
/* tables have no visible caption now (aria-label carries it) */
#leaderboard .controls{margin-bottom:12px}
.tsub{margin:24px 0 4px}

/* ---- type scale (Oct 2): six sizes, two weights, three families with fixed roles ----
   sizes  40 H1 (clamp 30-40) | 26 H2 + stat numbers | 19 H3 + subtitle + brand | 16 body prose | 14 secondary/UI/tables/code | 12.5 labels, intervals, chart text
   weights 400 text, 600 headings/emphasis
   serif = H1, H2, H3 headings, transcripts, brand; mono = tool names and code only; sans = everything else */
:root{--fs-h1:clamp(30px,3.1vw,40px);--fs-h2:clamp(22px,2.6vw,26px);--fs-h3:19px;--fs-body:16px;--fs-sm:14px;--fs-xs:12.5px}
body{font-size:var(--fs-body)}
code{font-size:var(--fs-sm)}
h1{font-size:var(--fs-h1);font-weight:600}
h2,#leaderboard h2{font:600 var(--fs-h2)/1.2 var(--serif)}
.finding h3,.refs h3,.fn-h,.tsub,.xd-title,.hero-diag .xd-title{font:600 var(--fs-h3)/1.3 var(--serif)}
.brand{font:600 var(--fs-h3) var(--serif)}
.subtitle{font:400 var(--fs-h3)/1.4 var(--sans);color:var(--ink2)}
.kicker,.fnum,.xd-k,.tag,.gloss dt span{font:600 var(--fs-xs)/1.5 var(--sans);text-transform:uppercase;letter-spacing:.06em}
.kicker{color:var(--accent)}
.fnum,.xd-k,.gloss dt span{color:var(--muted)}
.gloss dt span{text-transform:none;letter-spacing:0;font-weight:400}
.stats dd,.hero-head .stats dd{font:600 var(--fs-h2)/1.15 var(--sans);font-variant-numeric:tabular-nums}
.stats dd small{font-size:var(--fs-sm);font-weight:400}
.stats dt{font-size:var(--fs-body);font-weight:600}
.stats>div>span{font-size:var(--fs-sm)}
.lede-sub,.sub,.finding p,.gloss dd,.refs dd,.howto p,.xd-q,.pair .t,.pairs.compact .pair .t{font-size:var(--fs-body)}
.refs dt,.gloss dt,.pairs.compact .pair h3{font-size:var(--fs-body);font-weight:600}
.note,.fn,.res,.pairs.compact .res,.xdiag .res,.xdiag figcaption,.xdiag figcaption.xd-scn,.finding figcaption,.legend,.meta,.foot,.swipe,.howto details p,#lbTable .note,
.btn,.seg,.filter,.copy,.top nav a,.howto summary,.var b,.pairs.compact .var b,.xd-vt b,.var code,.pairs.compact .var code,.xd-gold code,.code pre,table,th,.tip{font-size:var(--fs-sm)}
th small,.ci,.vd,td.c-name sup a,.more{font-size:var(--fs-xs)}
.xdiag figcaption .more{font-size:inherit}
td.c-name{font-weight:600}
.c-axis,.c-lab,.c-lab-ref,.c-val,.c-head,.c-tag,.c-fn{font-size:var(--fs-xs);font-family:var(--sans)}
.c-tag{fill:var(--muted)}
/* one meaning per symbol: the disclosure toggle uses +/- (play/pause triangles are for audio only) */
.howto summary{list-style:none}
.howto summary::-webkit-details-marker{display:none}
.howto summary::before{content:"+";display:inline-block;width:1em;font-weight:600}
.howto details[open] summary::before{content:"\2212"}
b,strong,.fn .fname{font-weight:600}
.finding .fnum{font:600 var(--fs-xs)/1.5 var(--sans);text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.play,.xd-var .play,.pairs.compact .play,.mini .play{font-size:var(--fs-xs)}
.theme-btn,.xd-arr{font-size:var(--fs-sm)}
td.c-name sup{line-height:0}
@media(min-width:900px){.finding{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;padding:24px 0}}

/* ---- polish (Oct 2): three hero levels, breathing room on the 4-8-12-16-24-32-48 scale, compact table headers ----
   tier 3 moves 19 -> 20px so the subtitle can sit one clear step below the H1 without a seventh size */
:root{--fs-h3:20px}
/* hero: kicker -> H1 -> subtitle (sans 600, full ink) -> lede (16px, muted, more air above) */
.hero{padding:40px 16px 24px}
@media(min-width:720px){.hero{padding:40px 32px 24px}}
.kicker{margin:0 0 8px}
h1{margin:0 0 12px}
.subtitle{font:600 var(--fs-h3)/1.4 var(--sans);color:var(--ink);margin:0 0 16px;max-width:36em}
.lede-sub{color:var(--ink2);max-width:36em;margin:0 0 24px}
.hero-head{row-gap:32px}
@media(min-width:960px){
  .hero-head .stats{margin-top:0}
}
.hero-head .stats>div{padding:12px 0}
.hero-head .stats dt{margin-top:4px}
.hero-diag{margin-top:32px}
.meta{margin-top:16px}
/* hero diagram: scenario line sits under the gold column */
@media(min-width:701px){.xdiag figcaption.xd-scn{text-align:right}}
/* leaderboard: heading / how-to / controls on the scale; controls sit 12px above the table */
#leaderboard h2{margin-bottom:16px}
.howto{margin-bottom:24px}
#leaderboard .controls{margin-bottom:12px}
#lbTable th{vertical-align:bottom;padding-top:8px;padding-bottom:8px}
#lbTable th small{margin-top:2px}
@media(min-width:1100px){
  #lbTable th.c-probe{width:11.5%}
  #lbTable th.c-name{width:22%}
  #lbTable th.c-vendor{width:12%}
  #lbTable th.c-credit{width:17%}
  #lbTable th.c-gain{width:14%}
  #lbTable th.c-both{width:11.5%}
}
/* the fixed grid needs the full 1216px table; narrower desktops size columns to content (the wrap scrolls if needed) */
@media(min-width:1100px) and (max-width:1279px){
  #lbTable table{table-layout:auto}
  #lbTable th[class]{width:auto}
  #lbTable th,#lbTable th small{white-space:nowrap}
}
/* end of the tables -> notes and reference rows: a clear break */
.legend{margin-bottom:0}
.after-tables{margin-top:40px;padding-top:32px;border-top:1px solid var(--rule)}

/* verdict inline (no pill column): blue = passes, orange = significantly below; slim bar on the row's left edge.
   The verdict is also in visually hidden text in the name cell. */
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
#lbTable td.c-name{position:relative}
#lbTable tr.is-pass td.c-name,#lbTable tr.is-pass td.c-gain .v{color:var(--accent);font-weight:600}
#lbTable tr.is-below td.c-name,#lbTable tr.is-below td.c-gain .v{color:var(--warn);font-weight:600}
#lbTable tr.is-pass td.c-name{box-shadow:inset 3px 0 0 var(--accent)}
#lbTable tr.is-below td.c-name{box-shadow:inset 3px 0 0 var(--warn)}
#lbTable td.c-name,#lbTable th.c-name{padding-left:14px}
/* table view: legend swatches match the row bars; chart view keeps the plot's dot / triangle */
body:not(.view-chart) .legend .lg.pass,body:not(.view-chart) .legend .lg.below{width:12px;height:12px;border:0;border-radius:2px;vertical-align:-1px;margin-right:8px}
body:not(.view-chart) .legend .lg.pass{background:var(--accent)}
body:not(.view-chart) .legend .lg.below{background:var(--warn)}
body:not(.view-chart) .legend .lg-ns{display:none}