:root{
  --paper:#F7F5EE;--card:#FFFFFF;--ink:#1C2434;--ink-soft:#5A6479;
  --mimeo:#4B3FA0;--mimeo-soft:#EDEAF8;--pencil:#D99A12;--rule:#DCD6C6;--maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Instrument Sans",system-ui,-apple-system,sans-serif;font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
h1,h2,h3{font-family:"Fraunces",Georgia,serif;font-weight:800;line-height:1.1;letter-spacing:-.01em;margin:0}
a{color:var(--mimeo)}
.eyebrow{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--mimeo);margin:0 0 10px}

.skip-link{position:absolute;left:0;top:-120px;z-index:1000;background:var(--mimeo);color:#fff;padding:12px 18px;font-weight:600;text-decoration:none;border-radius:0 0 4px 0;transition:top .12s ease}
.skip-link:focus{top:0;color:#fff}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

.masthead{border-bottom:1px solid var(--rule);position:relative;z-index:1}
.masthead .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px}
.logo{font-family:"Fraunces",serif;font-weight:800;font-size:19px;letter-spacing:-.02em;text-decoration:none;color:var(--ink)}
.logo span{color:var(--mimeo)}
.masthead nav{display:flex;gap:20px;font-size:14px}
.masthead nav a{color:var(--ink-soft);text-decoration:none;white-space:nowrap}
.masthead nav a:hover{color:var(--mimeo)}
.masthead nav a[aria-current="page"]{color:var(--mimeo);font-weight:600}
.nav-toggle{display:none;font:inherit;font-size:14px;padding:8px 12px;background:#fff;border:1px solid var(--rule);border-radius:3px;color:var(--ink);cursor:pointer;line-height:1}
.nav-toggle:hover{border-color:var(--mimeo);color:var(--mimeo)}
.nav-toggle .icon{width:.95em;height:.95em;margin-right:.4em;vertical-align:-.08em}
@media(max-width:700px){
  .nav-toggle{display:inline-flex;align-items:center}
  .masthead nav{display:none;flex-basis:100%;flex-direction:column;gap:2px;padding-top:12px;border-top:1px solid var(--rule);margin-top:8px}
  .masthead nav a{padding:9px 2px;border-bottom:1px solid var(--rule);font-size:15.5px}
  .masthead nav a[aria-current="page"]{color:var(--mimeo)}
  .masthead nav.open{display:flex}
}

.hero{padding:28px 0 6px}
.hero-head{display:flex;gap:28px;align-items:center;justify-content:space-between}
.hero-copy{flex:1;min-width:0}
.hero h1{font-size:clamp(30px,4.8vw,50px);max-width:16ch}
.hero p.lede{font-size:17.5px;color:var(--ink-soft);max-width:60ch;margin:12px 0 0}

.tool{margin:30px 0 0;background:var(--card);border:1px solid var(--rule);border-radius:4px;display:grid;grid-template-columns:420px 1fr}
@media(max-width:880px){.tool{grid-template-columns:1fr}}
.stage{border-right:1px solid var(--rule);padding:18px 16px 26px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:linear-gradient(180deg,#fff,#FCFBF7)}
@media(max-width:880px){.stage{border-right:0;border-bottom:1px solid var(--rule)}}
.readout{text-align:center}
.readout .name{font-family:"Fraunces",serif;font-size:56px;font-weight:800;line-height:1}
.readout .name sup{font-size:24px;vertical-align:super;color:var(--mimeo)}
.readout .meta{font-family:"IBM Plex Mono",monospace;font-size:11.5px;color:var(--ink-soft);letter-spacing:.05em;margin-top:5px;max-width:260px;line-height:1.5}
svg.recorder{width:100%;max-width:344px;height:auto;display:block}
.legend{display:flex;gap:13px;flex-wrap:wrap;justify-content:center;font-family:"IBM Plex Mono",monospace;font-size:10.5px;color:var(--ink-soft)}
.legend i{display:inline-block;width:11px;height:11px;border-radius:50%;border:1.5px solid var(--ink);vertical-align:-1px;margin-right:5px}
.legend .f{background:var(--ink)}
.legend .h{background:linear-gradient(90deg,var(--ink) 50%,#fff 50%)}
.report{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.05em;color:var(--ink-soft);text-decoration:none;border-bottom:1px dotted var(--rule)}
.report:hover{color:var(--mimeo);border-color:var(--mimeo)}

/* Inline Font Awesome free icons (self-hosted SVG paths) */
.icon{display:inline-block;width:1em;height:1em;fill:currentColor;vertical-align:-.125em}
.report .icon{width:.85em;height:.85em;margin-right:.35em;vertical-align:-.13em}
.ghost .icon{width:.7em;height:.7em;margin-right:.45em;vertical-align:-.06em}
p .icon{vertical-align:-.1em}

.panel{padding:22px 24px 26px}
.controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:20px}
.seg{display:inline-flex;border:1px solid var(--rule);border-radius:3px;overflow:hidden}
.seg button{font:inherit;font-size:13px;padding:7px 13px;background:#fff;border:0;cursor:pointer;color:var(--ink-soft)}
.seg button+button{border-left:1px solid var(--rule)}
.seg button[aria-pressed="true"]{background:var(--mimeo);color:#fff}
.ghost{font:inherit;font-size:13px;padding:7px 14px;background:#fff;cursor:pointer;border:1px solid var(--rule);border-radius:3px;color:var(--ink)}
.ghost:hover{border-color:var(--mimeo);color:var(--mimeo)}
.row-label{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 9px;display:flex;align-items:center;gap:10px}
.row-label::after{content:"";flex:1;height:1px;background:var(--rule)}
.keys{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}
.key{font:inherit;min-width:50px;padding:9px 5px;background:#fff;border:1px solid var(--rule);border-radius:3px;cursor:pointer;text-align:center;line-height:1.2;transition:transform .08s ease}
.key b{display:block;font-family:"Fraunces",serif;font-size:18px;font-weight:600}
.key small{font-family:"IBM Plex Mono",monospace;font-size:9.5px;color:var(--ink-soft)}
.key:hover{border-color:var(--mimeo)}
.key:active{transform:translateY(1px)}
.key[aria-pressed="true"]{background:var(--mimeo);border-color:var(--mimeo);color:#fff}
.key[aria-pressed="true"] small{color:#CFC9EE}
.key:focus-visible,.ghost:focus-visible,.seg button:focus-visible,.report:focus-visible{outline:2px solid var(--mimeo);outline-offset:2px}
.tip{background:var(--mimeo-soft);border-left:3px solid var(--mimeo);padding:13px 16px;border-radius:0 3px 3px 0;font-size:15px}
.tip strong{font-weight:600}

section.prose{padding:52px 0;border-top:1px solid var(--rule);margin-top:56px}
section.prose h2{font-size:clamp(26px,3.4vw,34px);max-width:24ch}
section.prose h3{font-size:20px;font-weight:600;margin:30px 0 8px}
section.prose p{max-width:68ch;color:#2C3547}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:34px;margin-top:22px}
@media(max-width:760px){.cols{grid-template-columns:1fr}}
table.cmp{border-collapse:collapse;width:100%;font-size:15px;margin-top:16px}
table.cmp th,table.cmp td{border:1px solid var(--rule);padding:9px 12px;text-align:left;vertical-align:top}
table.cmp th{background:var(--mimeo-soft);font-weight:600}
code.fing{font-family:"IBM Plex Mono",monospace;font-size:14px;background:#fff;border:1px solid var(--rule);padding:1px 6px;border-radius:3px;white-space:nowrap}
.notes-line{font-family:"IBM Plex Mono",monospace;font-size:15px;background:#fff;border:1px solid var(--rule);border-radius:4px;padding:12px 14px;display:inline-block;line-height:1.9;margin:2px 0}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin-top:18px}
.card{background:var(--card);border:1px solid var(--rule);border-radius:4px;padding:16px}
.card h3{font-family:"Fraunces",serif;font-size:17px;font-weight:600;margin:0 0 4px}
.card p{font-size:14px;color:var(--ink-soft);margin:0 0 10px;max-width:none}
.card a{font-size:14px;font-weight:500}

.sheet{background:var(--card);border:1px solid var(--rule);border-radius:4px;padding:26px;margin-top:24px}
.sheet-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:16px}
.sheet-head .head-title{font-family:"Fraunces",serif;font-size:24px;font-weight:800;line-height:1.2}
.sheet-head .head-sub{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-family:"IBM Plex Mono",monospace;font-size:10.5px;color:var(--ink-soft);letter-spacing:.08em}
.sheet-head .head-sub span{display:inline-flex;align-items:center;gap:4px}
.sheet h3{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);font-weight:500;margin:20px 0 10px;padding-bottom:5px;border-bottom:1px solid var(--rule)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(88px,1fr));gap:12px}
.cell{border:1px solid var(--rule);border-radius:3px;padding:9px 5px;text-align:center}
.cell .n{font-family:"Fraunces",serif;font-size:21px;font-weight:600;line-height:1}
.cell .n .oct{font-size:12px;color:var(--ink-soft);margin-left:1px}
.cell .o{font-family:"IBM Plex Mono",monospace;font-size:9px;color:var(--ink-soft);letter-spacing:.05em;min-height:12px}
.cell svg{width:100%;max-width:44px;height:auto;margin:5px auto 0;display:block}
.cell .m{font-family:"IBM Plex Mono",monospace;font-size:8px;line-height:1.35;color:var(--ink-soft);margin-top:5px;min-height:11px}

details{border-bottom:1px solid var(--rule);padding:15px 0;max-width:76ch}
details summary{cursor:pointer;font-weight:600;font-size:17px;list-style:none}
details summary::-webkit-details-marker{display:none}
details summary:focus-visible{outline:2px solid var(--mimeo);outline-offset:2px;border-radius:2px}
details summary::before{content:"+";color:var(--mimeo);font-family:"IBM Plex Mono",monospace;margin-right:10px}
details[open] summary::before{content:"–"}
details p{margin:10px 0 0}

.sources{font-size:14.5px;color:var(--ink-soft);max-width:68ch;margin-top:14px}
footer{border-top:1px solid var(--rule);padding:30px 0 46px;font-size:14px;color:var(--ink-soft)}
footer a{color:var(--ink-soft)}
footer p{margin:0 0 8px}
footer .foot-brand{font-family:"Fraunces",serif;font-weight:800;font-size:16.5px;color:var(--ink);margin-bottom:6px}
footer .foot-brand span{color:var(--mimeo)}
footer .foot-verify{font-size:13.5px;max-width:64ch;margin-bottom:14px}
footer .foot-links{display:flex;flex-wrap:wrap;gap:6px 18px;margin-bottom:14px}
footer .foot-links a{font-size:13.5px}
footer .foot-copy{font-size:12.5px}

/* ==================================================================
   E-E-A-T / authorship blocks — byline, dates, methodology
   ================================================================== */
.byline{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;margin:12px 0 0;
  font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.04em;color:var(--ink-soft)}
.byline .who{font-weight:500;color:var(--mimeo)}
.byline .pub{color:var(--ink-soft)}
.method{background:var(--mimeo-soft);border-left:3px solid var(--mimeo);border-left-style:solid;
  padding:16px 18px;border-radius:0 3px 3px 0;font-size:15px;margin-top:22px;color:#3A2B4C}
.method h3{font-family:"Fraunces",serif;font-weight:600;font-size:17px;margin:0 0 8px}
.method p{margin:0 0 8px;line-height:1.65}
.method p:last-child{margin:0}

/* ==================================================================
   Hand-drawn SVG illustrations
   ================================================================== */
.hero-art{max-width:240px;margin:0;flex-shrink:0}
.hero-art img{width:100%;height:auto;display:block}
@media(max-width:760px){.hero-head{flex-direction:column;align-items:flex-start}}
@media(max-width:760px){.hero-art{max-width:200px}}
.fig{margin:24px 0 0;background:var(--card);border:1px solid var(--rule);border-radius:4px;padding:14px 14px 10px}
.fig img{width:100%;height:auto;display:block}
.fig figcaption{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.04em;color:var(--ink-soft);text-align:center;margin-top:8px;line-height:1.5}

@media print{
  @page{size:letter;margin:9mm}
  .masthead,.hero,.tool,footer,details,.noprint{display:none!important}
  section.prose{display:none}
  section#print{display:block}
  section#print .eyebrow,section#print h2,section#print>p{display:none}
  .sheet{border:0;padding:0;margin:0}
  body{background:#fff;font-size:11px}
  .sheet-head{margin-bottom:8px}
  .sheet-head .head-title{font-size:18px!important}
  .sheet-head .head-sub{font-size:8.5px!important;gap:8px!important}
  .sheet h3{font-size:8px;letter-spacing:.1em;margin:7px 0 3px;padding-bottom:2px}
  .grid{grid-template-columns:repeat(7,1fr);gap:4px}
  .cell{padding:3px 2px;break-inside:avoid}
  .cell .n{font-size:13px}
  .cell .o{font-size:7px;letter-spacing:.04em;min-height:9px}
  .cell svg{max-width:24px;margin:2px auto 0}
  .cell .m{display:none}
}