/* TaskHeron — ink + one acid-lime accent, editorial serif, mono UI labels. System fonts only. */
:root{
  --ink:#0c0d10; --ink2:#14161a; --ink3:#1c1f24; --line:#2b2e34;
  --paper:#ece8dc; --mute:#a3a198; --lime:#d4f53c; --lime-d:#b5d62a;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,"Times New Roman",serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --side:15.5rem;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;color-scheme:dark}
body{margin:0;background:var(--ink);color:var(--paper);font:1.125rem/1.7 var(--serif);text-rendering:optimizeLegibility}
img,svg{max-width:100%;height:auto}
a{color:var(--lime);text-decoration-thickness:1px;text-underline-offset:.2em}
a:hover{background:var(--lime);color:var(--ink);text-decoration:none}
:focus-visible{outline:3px solid var(--lime);outline-offset:3px}
::selection{background:var(--lime);color:var(--ink)}
.skip{position:absolute;left:-999px;top:0;background:var(--lime);color:var(--ink);padding:.6rem 1rem;font:700 .85rem var(--mono);z-index:99}
.skip:focus{left:0}
.mono,.kicker,.label{font-family:var(--mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase}

/* ---------- shell: left rail on desktop, top bar on mobile ---------- */
.shell{display:block}
.rail{border-bottom:1px solid var(--line);padding:.8rem 1.1rem;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:rgba(12,13,16,.96);z-index:20}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--paper);font:700 1.25rem var(--serif);letter-spacing:-.01em}
.brand:hover{background:none;color:var(--paper)}
.brand img{width:2.4rem;height:2.4rem;display:block}
.brand b{color:var(--lime);font-weight:700}
.menu{position:relative}
.menu summary{list-style:none;cursor:pointer;font:700 .78rem var(--mono);letter-spacing:.12em;text-transform:uppercase;border:1px solid var(--paper);padding:.5rem .8rem}
.menu summary::-webkit-details-marker{display:none}
.menu[open] summary{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.nav{display:flex;flex-direction:column;margin:0;padding:0;list-style:none}
.menu .nav{position:absolute;right:0;top:calc(100% + .6rem);width:16rem;background:var(--ink2);border:1px solid var(--lime);box-shadow:6px 6px 0 var(--lime)}
.nav a{display:flex;gap:.9rem;align-items:baseline;padding:.8rem 1rem;border-bottom:1px solid var(--line);color:var(--paper);text-decoration:none;font:600 .82rem var(--mono);letter-spacing:.1em;text-transform:uppercase}
.nav a i{font-style:normal;color:var(--lime)}
.nav a:hover,.nav a[aria-current=page]{background:var(--lime);color:var(--ink)}
.nav a:hover i,.nav a[aria-current=page] i{color:var(--ink)}
.side-note{display:none}
main{display:block;min-width:0}
.deskav{display:none}
@media (min-width:62rem){
  .shell{display:grid;grid-template-columns:var(--side) minmax(0,1fr);min-height:100vh}
  .rail{position:sticky;top:0;height:100vh;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:2rem;padding:1.6rem 0 1.4rem;border-bottom:0;border-right:1px solid var(--line);background:var(--ink)}
  .brand{padding:0 1.4rem;flex-direction:column;align-items:flex-start;gap:.9rem;font-size:1.6rem}
  .brand img{width:4.4rem;height:4.4rem}
  .menu{display:none}
  .deskav{display:flex;border-top:1px solid var(--line)}
  .side-note{display:block;margin-top:auto;padding:0 1.4rem;font:.74rem/1.7 var(--mono);color:var(--mute);letter-spacing:.04em}
  .side-note a{color:var(--paper)}
}

/* ---------- layout helpers ---------- */
.pad{padding:clamp(1.4rem,4vw,3.4rem)}
.measure{max-width:44rem}
h1,h2,h3{font-family:var(--serif);line-height:1.08;letter-spacing:-.02em;margin:0 0 .6em;font-weight:700}
h1{font-size:clamp(2.2rem,5.2vw,4.2rem)}
h2{font-size:clamp(1.6rem,3vw,2.35rem);margin-top:2.4em}
h3{font-size:1.4rem;letter-spacing:-.01em}
p{margin:0 0 1.1em}
.kicker{display:inline-block;background:var(--lime);color:var(--ink);padding:.28rem .6rem;font-weight:700;margin-bottom:1.1rem}
.label{color:var(--lime);font-weight:700}
.lead{font-size:1.3rem;color:var(--paper);line-height:1.55}
hr{border:0;border-top:1px solid var(--line);margin:2.4rem 0}
ul,ol{padding-left:1.3rem}
li{margin-bottom:.4em}

/* ---------- buttons ---------- */
.btn{display:inline-block;font:700 .82rem var(--mono);letter-spacing:.1em;text-transform:uppercase;text-decoration:none;color:var(--ink);background:var(--lime);padding:.85rem 1.25rem;border:2px solid var(--lime);box-shadow:5px 5px 0 var(--paper);transition:transform .12s,box-shadow .12s}
.btn:hover{background:var(--lime);color:var(--ink);transform:translate(3px,3px);box-shadow:2px 2px 0 var(--paper)}
.btn.ghost{background:transparent;color:var(--paper);border-color:var(--paper);box-shadow:5px 5px 0 var(--lime)}
.btn.ghost:hover{background:transparent;color:var(--paper);box-shadow:2px 2px 0 var(--lime)}
.btns{display:flex;flex-wrap:wrap;gap:1.1rem 1.4rem;margin:1.6rem 0 0}

/* ---------- home hero (asymmetric) ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);display:grid;gap:2rem;padding:clamp(1.6rem,5vw,4rem)}
.hero h1{font-size:clamp(2.6rem,7.4vw,6.6rem);line-height:.98;margin:0 0 .35em;max-width:13ch}
.hero h1 em{font-style:italic;color:var(--lime)}
.hero p.lead{max-width:34rem}
.hero .bird{display:none}
@media (min-width:62rem){
  .hero{grid-template-columns:minmax(0,1.5fr) minmax(0,.8fr);align-items:end;min-height:34rem}
  .hero .bird{display:block;justify-self:end;width:min(100%,24rem);transform:rotate(4deg) translateY(2rem);border:2px solid var(--lime);box-shadow:-14px 14px 0 var(--lime)}
  .hero .bird img{display:block;width:100%}
}
.strip{display:flex;flex-wrap:wrap;gap:.4rem 2rem;border-bottom:1px solid var(--line);padding:.9rem clamp(1.4rem,4vw,3.4rem);font:.74rem var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--mute)}
.strip b{color:var(--lime)}

/* ---------- indexed list (guides) ---------- */
.index{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.index li{margin:0;border-bottom:1px solid var(--line)}
.index a{display:grid;grid-template-columns:3.2rem 1fr;gap:.4rem 1rem;align-items:baseline;padding:1.3rem .4rem;color:var(--paper);text-decoration:none}
.index a:hover{background:var(--lime);color:var(--ink)}
.index .no{font:700 1.6rem var(--mono);color:var(--lime)}
.index a:hover .no,.index a:hover .meta{color:var(--ink)}
.index .t{font:700 clamp(1.25rem,2.4vw,1.75rem)/1.2 var(--serif);letter-spacing:-.01em}
.index .meta{grid-column:2;font:.74rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--mute)}
.index .d{grid-column:2;color:inherit;font-size:1rem;opacity:.85}
@media (min-width:62rem){ .index a{grid-template-columns:4.5rem 1fr 11rem;padding:1.5rem .8rem} .index .meta{grid-column:3;grid-row:1;text-align:right} .index .d{grid-column:2} .index .no{font-size:2.2rem} }

.split{display:grid;gap:2rem}
@media (min-width:62rem){ .split{grid-template-columns:minmax(0,16rem) minmax(0,1fr);gap:3rem} .split>h2{margin-top:0} }
.principles{display:grid;gap:0;margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
.principles li{border-bottom:1px solid var(--line);padding:1rem 0;margin:0}
.principles strong{font:700 .8rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--lime);display:block;margin-bottom:.2rem}

.band{background:var(--lime);color:var(--ink);padding:clamp(1.4rem,4vw,3rem);border-top:1px solid var(--ink)}
.band h2{margin-top:0;color:var(--ink)}
.band a{color:var(--ink);font-weight:700}
.band a:hover{background:var(--ink);color:var(--lime)}
.band .btn{background:var(--ink);color:var(--lime);border-color:var(--ink);box-shadow:5px 5px 0 var(--paper)}
.band .btn:hover{background:var(--ink);color:var(--lime)}

/* ---------- article ---------- */
.crumbs{font:.72rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--mute);margin:0 0 1.4rem}
.crumbs a{color:var(--mute)}
.crumbs span[aria-current]{color:var(--paper)}
.crumbs a:hover{color:var(--ink)}
.art-head{border-bottom:1px solid var(--line);padding-bottom:1.6rem;margin-bottom:2rem}
.art-head h1{max-width:18ch}
.art-grid{display:grid;gap:2rem}
.glance{border:1px solid var(--lime);padding:1.1rem 1.2rem;background:var(--ink2);font-size:1rem;line-height:1.55}
.glance h2{font:700 .74rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--lime);margin:0 0 .6rem}
.glance ul{margin:0 0 .9rem;padding-left:1.1rem}
.glance p{margin:0 0 .6rem}
.updated{font:.72rem var(--mono);color:var(--mute);letter-spacing:.08em;text-transform:uppercase}
@media (min-width:75rem){ .art-grid{grid-template-columns:minmax(0,44rem) 17rem;gap:4rem} .glance{position:sticky;top:1.5rem;align-self:start} }
.note{border:1px dashed var(--mute);padding:.8rem 1rem;font-size:.95rem;color:var(--mute);margin:0 0 1.8rem}
.note strong{color:var(--paper)}
.note a{color:var(--paper)}

/* step component */
.steps{list-style:none;margin:2rem 0;padding:0;counter-reset:step}
.steps>li{counter-increment:step;position:relative;display:grid;grid-template-columns:3.4rem minmax(0,1fr);gap:0 1.1rem;margin:0;padding:0 0 2.4rem}
.steps>li::before{content:counter(step,decimal-leading-zero);font:700 2.2rem/1 var(--mono);color:var(--ink);-webkit-text-stroke:1.5px var(--lime);text-align:left}
.steps>li::after{content:"";position:absolute;left:1.15rem;top:3rem;bottom:.3rem;border-left:2px dotted var(--line)}
.steps>li:last-child::after{display:none}
.steps h3{margin:.1rem 0 .55rem}
.steps .body{grid-column:2}
@media (min-width:48rem){ .steps>li{grid-template-columns:5.4rem minmax(0,1fr)} .steps>li::before{font-size:3.4rem} .steps>li::after{left:1.6rem;top:4.2rem} }
.tip{margin:1.2rem 0;border:2px solid var(--lime);padding:.9rem 1.1rem 1rem;font-size:1rem;line-height:1.6;background:var(--ink2)}
.tip .label{display:block;margin-bottom:.25rem}
pre.prompt{margin:1.1rem 0;padding:2.4rem 1.1rem 1.1rem;background:var(--ink2);border:1px solid var(--line);border-left:4px solid var(--lime);font:.88rem/1.65 var(--mono);white-space:pre-wrap;overflow-wrap:anywhere;position:relative;color:var(--paper)}
pre.prompt::before{content:"Prompt template";position:absolute;top:.7rem;left:1.1rem;font:700 .68rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--lime)}

/* sources */
.sources{border-top:1px solid var(--line);margin-top:3rem;padding-top:1rem;font-size:.98rem}
.sources h2{font:700 .8rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--lime);margin:0 0 .6rem}
.sources ol{margin:0;padding-left:1.4rem}
.sources .fn{color:var(--mute)}

/* comparison table */
.tablewrap{margin:1.6rem 0;border:1px solid var(--line);overflow-x:auto}
table.cmp{border-collapse:collapse;width:100%;min-width:46rem;font-size:.98rem;line-height:1.5}
.cmp caption{text-align:left;padding:.8rem 1rem;font:.72rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--mute);caption-side:bottom;border-top:1px solid var(--line)}
.cmp th,.cmp td{padding:1rem;vertical-align:top;text-align:left;border-bottom:1px solid var(--line)}
.cmp thead th{font:700 .85rem var(--mono);letter-spacing:.1em;text-transform:uppercase;background:var(--ink3);border-bottom:2px solid var(--lime)}
.cmp tbody th{font:700 .76rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--lime);width:11rem;background:var(--ink2)}
.cmp tbody td+td{border-left:1px solid var(--line)}
.cmp td sup,.cmp td .ref{font:.7rem var(--mono);color:var(--mute)}
@media (max-width:47.99rem){
  table.cmp{min-width:0}
  .cmp thead{position:absolute;left:-9999px}
  .cmp,.cmp tbody,.cmp tr,.cmp th,.cmp td{display:block;width:100%}
  .cmp tbody tr{border-bottom:2px solid var(--lime)}
  .cmp tbody th{width:auto;padding:.7rem 1rem}
  .cmp td::before{content:attr(data-label);display:block;font:700 .68rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--lime);margin-bottom:.2rem}
  .cmp td{border-bottom:1px solid var(--line)}
}
.fit{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);margin:1.6rem 0}
.fit>div{background:var(--ink);padding:1.2rem}
.fit h3{font-size:1.15rem;color:var(--lime);margin-bottom:.4rem}
.fit p{margin:0;font-size:1rem}
@media (min-width:62rem){ .fit{grid-template-columns:repeat(3,1fr)} }

/* tools list */
.tool{border-top:1px solid var(--line);padding:2rem 0;display:grid;gap:1rem}
.tool h2{margin:0;font-size:clamp(1.8rem,3.4vw,2.6rem)}
.tool dl{margin:0;display:grid;gap:.9rem}
.tool dt{font:700 .72rem var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--lime)}
.tool dd{margin:0}
@media (min-width:62rem){ .tool{grid-template-columns:minmax(0,14rem) minmax(0,1fr);gap:3rem} }

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);margin-top:3rem;padding:2.4rem clamp(1.4rem,4vw,3.4rem) 2rem;background:var(--ink2)}
.mark{font:700 clamp(3rem,13vw,10rem)/.9 var(--serif);letter-spacing:-.04em;color:transparent;-webkit-text-stroke:1.5px var(--lime);margin:0 0 1.6rem;overflow:hidden}
.fcols{display:grid;gap:1.6rem;font:.8rem/1.9 var(--mono);letter-spacing:.04em}
.fcols h2{font:700 .7rem var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--lime);margin:0 0 .4rem}
.fcols ul{list-style:none;margin:0;padding:0}
.fcols li{margin:0}
.fcols a{color:var(--paper)}
.fcols a:hover{color:var(--ink)}
@media (min-width:48rem){ .fcols{grid-template-columns:repeat(4,1fr)} }
.disc{margin:1.8rem 0 0;padding-top:1.1rem;border-top:1px solid var(--line);font:.78rem/1.7 var(--mono);color:var(--mute)}
.credit{margin:.4rem 0 0;font:.78rem var(--mono);color:var(--mute)}
.credit a{color:var(--paper)}
.credit a:hover{color:var(--ink)}

.notfound .big{font:700 clamp(6rem,24vw,16rem)/.85 var(--serif);color:transparent;-webkit-text-stroke:2px var(--lime);margin:0}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{body{background:#fff;color:#000}.rail,.foot,.btns{display:none}a{color:#000}}
.steps>li::before{grid-row:1 / span 2}
.steps h3{grid-column:2}
@media (min-width:75rem){ .art-grid>.glance{grid-column:2;grid-row:1} .art-grid>.art-main{grid-column:1;grid-row:1} }
.cta{margin:2.4rem 0;border:2px solid var(--lime);padding:1.3rem 1.4rem;background:var(--ink2)}
.cta h2{margin:0 0 .4rem;font-size:1.5rem}
.cta p{margin:0 0 .4rem;font-size:1rem;color:var(--mute)}
.cta .btns{margin-top:1rem}

@media (max-width:47.99rem){.cmp caption{display:block;width:100%;border-top:0;border-bottom:1px solid var(--line)}.cmp caption{caption-side:top}.cmp tbody td+td{border-left:0}}
.tool h2 .label{display:block;margin-top:.7rem;font-size:.68rem;line-height:1.6}