@font-face{font-family:"Geist";src:url(/assets/fonts/geist.woff2) format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Geist Mono";src:url(/assets/fonts/geist-mono.woff2) format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Instrument Serif";src:url(/assets/fonts/instrument-serif-italic.woff2) format("woff2");font-weight:400;font-style:italic;font-display:swap}
:root{
  --bg:#fafaf9; --bg-2:#f5f5f4; --surface:#ffffff;
  --fg:#0a0a0a; --fg-2:#525252; --fg-3:#737373; --fg-4:#a3a3a3;
  --line:#e7e5e4; --line-2:#d6d3d1;
  --r-sm:8px; --r:12px; --r-lg:16px;
  --pad:24px; --maxw:1120px;
  --sans:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --serif:"Instrument Serif",ui-serif,Georgia,serif;
  --ease:cubic-bezier(.2,.7,.2,1);
}
@media (min-width:768px){:root{--pad:40px}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;background:var(--bg);color:var(--fg);font:400 16px/1.5 var(--sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-feature-settings:"ss01","cv11";text-rendering:optimizeLegibility;overflow-x:hidden}
a{color:inherit;text-decoration:none}
h1,h2,h3,p{margin:0}
ul{margin:0;padding:0;list-style:none}
svg{display:block}
.mono{font-family:var(--mono);font-feature-settings:normal}
.muted{color:var(--fg-3)}
.small{font-size:13px;line-height:20px}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
:focus-visible{outline:2px solid var(--fg);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:16px;top:-48px;z-index:100;background:var(--fg);color:var(--bg);padding:8px 16px;border-radius:var(--r-sm);font-size:14px;transition:top .2s}
.skip:focus{top:16px}
::selection{background:#0a0a0a;color:#fafaf9}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(250,250,249,.72);-webkit-backdrop-filter:saturate(180%) blur(16px);backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid transparent;transition:border-color .2s var(--ease)}
.site-header.scrolled,.nf-page .site-header{border-bottom-color:var(--line)}
.bar{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:550;font-size:15px;letter-spacing:-.01em;white-space:nowrap}
.mark{width:24px;height:24px;flex:none}
.brand-sub{font-family:var(--mono);font-weight:400;font-size:13px;color:var(--fg-3);margin-left:-2px}
.nav{display:flex;align-items:center;gap:4px}
.nav a{font-size:14px;color:var(--fg-2);padding:8px 12px;border-radius:999px;transition:color .15s,background-color .15s}
.nav a:hover{color:var(--fg);background:rgba(10,10,10,.04)}
.pill{display:inline-flex;align-items:center;height:24px;padding:0 8px;margin-left:8px;border:1px solid var(--line);border-radius:999px;font:450 12px/1 var(--mono);letter-spacing:0;color:var(--fg-3);background:var(--surface);white-space:nowrap}
@media (max-width:640px){
  .nav a{padding:8px 10px}
  .nav a[href="/#notes"]{display:none}
  .brand-sub{display:none}
  .pill{margin-left:4px}
}
@media (max-width:479px){.nav a[href="/#focus"]{display:none}}
@media (max-width:374px){.site-header .pill{display:none}.prompt-text .pre{display:none}}

/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
@media (min-width:900px){.hero{min-height:min(calc(100svh - 64px),880px);display:flex;align-items:center}.hero-inner{padding-top:96px!important;padding-bottom:112px!important}}
.field{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;
}
.hero-inner{position:relative;padding-top:144px;padding-bottom:128px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;line-height:16px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);margin-bottom:24px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--fg);box-shadow:0 0 0 3px rgba(10,10,10,.08)}
.hero h1,.nf h1{font-weight:600;font-size:clamp(48px,9.2vw,112px);line-height:.98;letter-spacing:-.045em;text-wrap:balance}
.lede{margin-top:24px;max-width:640px;font-size:clamp(18px,2.2vw,24px);line-height:1.45;letter-spacing:-.012em;color:var(--fg-2);text-wrap:pretty}
.lede em{font-family:var(--serif);font-style:italic;font-size:1.14em;letter-spacing:0;color:var(--fg);line-height:1}
.prompt{margin-top:48px;display:flex;align-items:center;gap:12px;max-width:480px;height:56px;padding:0 8px 0 20px;background:rgba(255,255,255,.82);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:var(--r);box-shadow:0 1px 2px rgba(10,10,10,.04),0 8px 24px -12px rgba(10,10,10,.12);transition:border-color .2s,box-shadow .2s,transform .2s var(--ease)}
.prompt:hover{border-color:var(--line-2);box-shadow:0 1px 2px rgba(10,10,10,.05),0 12px 32px -12px rgba(10,10,10,.18)}
.prompt:focus-visible{border-radius:var(--r)}
.prompt-caret{color:var(--fg-4);font-size:18px;line-height:1}
.prompt-text{flex:1;min-width:0;font-size:15px;color:var(--fg);white-space:nowrap;overflow:hidden}
.prompt-text .pre{color:var(--fg-3)}
.cursor{display:inline-block;width:8px;height:18px;margin-left:2px;vertical-align:-3px;background:var(--fg);animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.prompt-key{flex:none;display:grid;place-items:center;width:40px;height:40px;border-radius:var(--r-sm);background:var(--fg);color:var(--bg);font:inherit}
.prompt-key svg{width:16px;height:16px}

/* sections */
.section{padding:128px 0;border-bottom:1px solid var(--line)}
.grid2{display:grid;grid-template-columns:1fr;gap:16px;margin-bottom:48px}
@media (min-width:900px){.grid2{grid-template-columns:240px 1fr;gap:32px;margin-bottom:56px}}
.label{font-size:12px;line-height:32px;letter-spacing:.06em;text-transform:uppercase;color:var(--fg-3)}
h2{font-weight:600;font-size:clamp(32px,4.4vw,48px);line-height:1.08;letter-spacing:-.035em;text-wrap:balance}
.sub{margin-top:12px;font-size:17px;line-height:1.5;color:var(--fg-3);text-wrap:pretty}

.cells{display:grid;grid-template-columns:1fr;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);overflow:hidden}
@media (min-width:640px){.cells{grid-template-columns:1fr 1fr}}
@media (min-width:1080px){.cells{grid-template-columns:repeat(4,1fr)}}
.cell{position:relative;padding:32px 24px 32px;min-height:240px;display:flex;flex-direction:column;border-top:1px solid var(--line);transition:background-color .2s}
.cell:first-child{border-top:0}
@media (min-width:640px){
  .cell:nth-child(2){border-top:0}
  .cell:nth-child(even){border-left:1px solid var(--line)}
}
@media (min-width:1080px){
  .cell{border-top:0;min-height:288px;padding:32px}
  .cell+.cell{border-left:1px solid var(--line)}
}
.cell:hover{background:#fcfcfb}
.glyph{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--fg)}
.glyph svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.glyph svg .fill{fill:currentColor;stroke:none}
.idx{position:absolute;top:32px;right:24px;font-size:12px;color:var(--fg-3)}
@media (min-width:1080px){.idx{right:32px}}
.cell h3{margin-top:auto;padding-top:40px;font-weight:550;font-size:18px;line-height:24px;letter-spacing:-.015em}
.cell p{margin-top:8px;font-size:15px;line-height:24px;color:var(--fg-3);text-wrap:pretty}

.empties{display:grid;grid-template-columns:1fr;gap:16px}
@media (min-width:768px){.empties{grid-template-columns:1fr 1fr;gap:24px}}
.empty{border:1px solid var(--line);border-radius:var(--r-lg);padding:32px;background:var(--surface);
  background-image:radial-gradient(circle at 1px 1px,#e7e5e4 1px,transparent 0);background-size:16px 16px;background-position:-1px -1px}
.empty{background-color:var(--surface)}
.term{display:inline-block;padding:12px 16px;font-size:13px;line-height:20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);color:var(--fg)}
.t-dim{color:var(--fg-4)}
.empty h3{margin-top:48px;font-weight:550;font-size:20px;line-height:28px;letter-spacing:-.02em}
.empty p{margin-top:8px;font-size:15px;line-height:24px;color:var(--fg-3);max-width:400px;text-wrap:pretty}

.rows{border-top:1px solid var(--line)}
.row{display:grid;grid-template-columns:40px 1fr auto 16px;align-items:center;gap:16px;min-height:80px;padding:16px 8px;border-bottom:1px solid var(--line);transition:background-color .2s,padding .3s var(--ease)}
.row:hover{background:var(--surface)}
@media (hover:hover){.row:hover{padding-left:16px;padding-right:16px}}
.ico{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
.ico svg{width:18px;height:18px}
.row-name{font-weight:550;font-size:20px;letter-spacing:-.02em}
.row-handle{font-size:14px;color:var(--fg-3)}
.arrow{width:16px;height:16px;color:var(--fg-4);transition:transform .25s var(--ease),color .2s}
.row:hover .arrow{color:var(--fg);transform:translate(2px,-2px)}
@media (max-width:479px){
  .row{grid-template-columns:40px 1fr 16px;row-gap:0;gap:4px 16px}
  .row .ico{grid-row:span 2}
  .row-name{font-size:17px;line-height:24px}
  .row-handle{grid-column:2;grid-row:2;font-size:13px;line-height:20px}
  .row .arrow{grid-column:3;grid-row:1/span 2}
}

/* footer */
.site-footer{padding:48px 0 calc(48px + env(safe-area-inset-bottom))}
.foot{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:24px 32px}
.brand-sm{font-size:14px}
.brand-sm .mark{width:20px;height:20px}
.foot-left p{margin-top:12px}
.foot-links{display:flex;flex-wrap:wrap;gap:4px 20px;font-size:13px;line-height:32px;color:var(--fg-3)}
.foot-links a{transition:color .15s}
.foot-links a:hover{color:var(--fg)}
.foot-links a:first-child{color:var(--fg-2)}

/* 404 */
.nf{position:relative;overflow:hidden;min-height:calc(100svh - 64px - 140px);display:flex;align-items:center;border-bottom:1px solid var(--line)}
.nf-inner{position:relative;padding-top:96px;padding-bottom:96px}

@media (max-width:640px){
  .hero-inner{padding-top:96px;padding-bottom:96px}
  .section{padding:96px 0}
  .prompt{margin-top:40px}
  .empty{padding:24px}
  .empty h3{margin-top:40px}
  .cell{min-height:0;padding:24px}
  .idx{top:24px;right:24px}
  .cell h3{padding-top:24px}
  .foot-links{gap:0 16px}
  .foot-links a:first-child{flex-basis:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* 3D revision: isometric glyphs + room for the sphere under the text on small screens */
.glyph.iso{width:64px;height:64px;border:0;border-radius:0;background:none;display:block;margin:-4px 0 0 -4px}
.glyph.iso svg{width:64px;height:64px;stroke:none;stroke-width:initial;fill:initial;overflow:visible}
.cell:hover .glyph.iso svg{transform:translateY(-2px)}
.glyph.iso svg{transition:transform .3s var(--ease)}
@media (max-width:899px){.hero-inner,.nf-inner{padding-bottom:clamp(300px,64vw,460px)}}
@media (max-width:640px){.hero-inner,.nf-inner{padding-top:56px;padding-bottom:clamp(296px,86vw,360px)}}
@media (prefers-reduced-motion:reduce){.glyph.iso svg{transition:none}}