/* =========================================================================
   Penstock — fictional demo brand for zakharov.studio
   Monochrome technical blueprint: pure B/W, halftone field, isometric line-art.
   ========================================================================= */
:root{
  --black:#000000; --paper:#EEEEEE; --paper-2:#E4E4E4; --white:#FFFFFF;
  --ink:#0A0A0A; --ink-2:#3A3A3A; --muted:#5E5E5E; --faint:#616161;
  --line:#CFCFCF; --line-2:#B4B4B4;
  --on-black:#F2F2F2; --on-black-2:#A8A8A8; --on-black-3:#8A8A8A;
  --edge:rgba(255,255,255,.16);

  --font:"Archivo",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --shell:clamp(16px,4vw,60px);
  --maxw:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--black);color:var(--ink);font-family:var(--font);
  font-size:16px;line-height:1.58;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit}
button,input{font:inherit}
:focus-visible{outline:2.5px solid var(--ink);outline-offset:3px;border-radius:4px}
/* on solid/inverted buttons currentColor equals the surrounding surface, so pin the ring
   and give it a halo that reads on either ground */
.btn:focus-visible{outline-color:var(--ink);box-shadow:0 0 0 6px var(--paper)}
.btn--inv:focus-visible,.btn--invline:focus-visible{outline-color:var(--paper);box-shadow:0 0 0 6px var(--black)}
.outro :focus-visible,.foot :focus-visible{outline-color:var(--paper)}
::selection{background:var(--ink);color:var(--paper)}

h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.038em;line-height:1.06}
h1{font-size:clamp(2.1rem,4.6vw,3.5rem);letter-spacing:-.042em;line-height:1.12}
h2{font-size:clamp(1.8rem,3.8vw,2.85rem);letter-spacing:-.04em;line-height:1.1}
h3{font-size:clamp(1rem,1.4vw,1.14rem);letter-spacing:-.025em;line-height:1.3}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--shell)}
.pad{padding-block:clamp(56px,7vw,104px)}
.lede{font-size:clamp(.97rem,1.1vw,1.05rem);line-height:1.62;color:var(--muted);max-width:52ch}
.mono{font-family:var(--mono);font-size:10.5px;letter-spacing:.17em;text-transform:uppercase;font-weight:500}

/* corner-bracket emphasis — the brand's one typographic device */
.br{position:relative;display:inline-block;padding:0 .3em;white-space:nowrap}
.br::before,.br::after{content:"";position:absolute;width:.24em;height:.3em;border:.07em solid currentColor}
.br::before{left:-.04em;top:.07em;border-right:0;border-bottom:0}
.br::after{right:-.04em;bottom:.16em;border-left:0;border-top:0}

/* ---- halftone field -------------------------------------------------- */
.halftone{position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle at center,#fff 42%,transparent 43%);
  background-size:14px 14px}
.ht-tl{-webkit-mask-image:linear-gradient(135deg,#000 4%,transparent 46%);mask-image:linear-gradient(135deg,#000 4%,transparent 46%)}
.ht-br{-webkit-mask-image:linear-gradient(315deg,#000 4%,transparent 46%);mask-image:linear-gradient(315deg,#000 4%,transparent 46%)}

/* ---- buttons --------------------------------------------------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55em;border:1px solid var(--ink);
  border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;letter-spacing:-.012em;padding:12px 22px;
  text-decoration:none;background:var(--ink);color:var(--paper);
  transition:background .26s var(--ease),color .26s var(--ease),transform .26s var(--ease),border-color .26s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn--solid:hover{background:#2A2A2A;border-color:#2A2A2A}
.btn--ghost{background:var(--white);color:var(--ink);border-color:var(--line-2)}
.btn--ghost:hover{border-color:var(--ink)}
.btn--inv{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.btn--inv:hover{background:var(--white);border-color:var(--white)}
.btn--invline{background:transparent;color:var(--on-black);border-color:var(--edge)}
.btn--invline:hover{border-color:var(--on-black);background:rgba(255,255,255,.06)}
.btn .ar{transition:transform .3s var(--ease)}
.btn:hover .ar{transform:translateX(3px)}

/* ---- the sheet: a bright panel floating on the black field ------------ */
.sheet{position:relative;background:var(--paper);color:var(--ink);
  margin:clamp(46px,7vw,96px) clamp(12px,3.4vw,64px);z-index:2}
.crop{position:absolute;width:11px;height:11px;background:var(--white);z-index:3}

/* ---- nav ------------------------------------------------------------- */
.nav{position:relative;display:flex;align-items:center;gap:22px;padding:16px clamp(16px,3vw,26px);border-bottom:1px solid var(--line)}
.logo{display:flex;align-items:center;gap:10px;font-weight:600;font-size:17px;letter-spacing:-.04em;text-decoration:none}
.logo .m{width:26px;height:26px;border-radius:7px;background:var(--ink);display:grid;place-items:center;flex:none}
.logo .m svg{width:14px;height:14px;color:var(--paper)}
.nav-links{display:flex;gap:24px;list-style:none;margin:0 auto;padding:0}
.nav-links a{font-size:13.5px;font-weight:500;color:var(--ink-2);text-decoration:none;display:inline-flex;
  align-items:center;gap:5px;min-height:26px;padding-block:4px;transition:color .22s}
.nav-links a:hover{color:var(--ink)}
.nav-links svg{width:11px;height:11px;opacity:.6}
.nav-actions{display:flex;gap:8px;align-items:center}
.nav-actions .txt{font-size:13.5px;font-weight:500;text-decoration:none;padding:9px 14px}
.navtoggle{display:none;border:1px solid var(--line-2);background:var(--white);border-radius:8px;padding:7px;
  cursor:pointer;margin-left:auto;color:var(--ink)}
.navtoggle svg{width:19px;height:19px;display:block}

/* ---- hero ------------------------------------------------------------ */
.hero{padding:clamp(38px,5.4vw,64px) clamp(16px,3vw,26px) clamp(20px,3vw,32px)}
.hero-top{display:grid;grid-template-columns:minmax(0,1.16fr) minmax(0,1fr);gap:clamp(24px,4vw,64px);
  align-items:start;margin-bottom:clamp(26px,4vw,48px)}
.hero h1{max-width:19ch}
.hero-right p{color:var(--muted);font-size:14.5px;line-height:1.62;margin:0 0 22px;max-width:44ch}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap}

/* the isometric diagram — the signature piece */
.diagram{position:relative;border-top:1px solid var(--line);padding-top:clamp(18px,2.6vw,28px)}
.diagram svg{width:100%;height:auto;display:block;overflow:visible}
.dg-line{fill:none;stroke:var(--ink);stroke-width:1.15;stroke-linejoin:round;stroke-linecap:round;vector-effect:non-scaling-stroke}
.dg-thin{fill:none;stroke:var(--line-2);stroke-width:1;vector-effect:non-scaling-stroke}
.dg-fill{fill:var(--white);stroke:var(--ink);stroke-width:1.15;stroke-linejoin:round;vector-effect:non-scaling-stroke}
.dg-hex{font-family:var(--mono);font-size:9px;fill:var(--ink-2);letter-spacing:.06em}
.dg-cap{font-family:var(--mono);font-size:8px;fill:var(--faint);letter-spacing:.14em}
.flow{stroke:var(--ink);stroke-width:1.6;fill:none;stroke-linecap:round;stroke-dasharray:4 7;
  vector-effect:non-scaling-stroke}
@keyframes flowrun{to{stroke-dashoffset:-110}}
.js .flow{animation:flowrun 3.4s linear infinite}
.node{fill:var(--white);stroke:var(--ink);stroke-width:1.15;vector-effect:non-scaling-stroke}
@keyframes nodepulse{0%,100%{transform:scale(1)}50%{transform:scale(1.28)}}
.js .node.live{animation:nodepulse 2.6s ease-in-out infinite;transform-box:fill-box;transform-origin:center}
.dg-legend{display:flex;gap:clamp(14px,2.4vw,34px);flex-wrap:wrap;margin-top:16px;padding-top:14px;
  border-top:1px solid var(--line)}
.dg-legend span{font-family:var(--mono);font-size:9.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--faint)}
.dg-legend b{color:var(--ink);font-weight:500}

/* ---- steps ----------------------------------------------------------- */
.steps{background:var(--white);border-top:1px solid var(--line)}
.steps-in{padding:clamp(40px,5.4vw,72px) clamp(16px,3vw,26px)}
.shead{max-width:min(640px,88%);margin-bottom:clamp(26px,3.4vw,44px)}
.shead p{margin:14px 0 0}
.srow{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(12px,2vw,26px)}
.step{border-top:2px solid var(--ink);padding-top:16px}
.step .n{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--faint);display:block;margin-bottom:12px}
.step h3{margin-bottom:7px}
.step p{font-size:13.4px;color:var(--muted);margin:0;line-height:1.55}

/* ---- model grid ------------------------------------------------------ */
.models{background:var(--paper);border-top:1px solid var(--line)}
.models-in{padding:clamp(40px,5.4vw,72px) clamp(16px,3vw,26px)}
.mgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.mcard{background:var(--paper);padding:22px 20px 24px;display:flex;flex-direction:column;gap:10px;
  transition:background .28s var(--ease)}
.mcard:hover{background:var(--white)}
.mcard .id{font-family:var(--mono);font-size:9.5px;letter-spacing:.15em;color:var(--faint)}
.mcard h3{letter-spacing:-.03em}
.mcard p{font-size:13.2px;color:var(--muted);margin:0;line-height:1.52}
.mcard dl{display:grid;grid-template-columns:auto 1fr;gap:5px 12px;margin:6px 0 0;font-size:11.5px}
.mcard dt{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);align-self:center}
.mcard dd{margin:0;font-weight:500;font-variant-numeric:lining-nums}
.spark{height:34px;width:100%;margin-top:auto}
.spark path{fill:none;stroke:var(--ink);stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}

/* ---- CLI block ------------------------------------------------------- */
.cli-sec{background:var(--white);border-top:1px solid var(--line)}
.cli-in{padding:clamp(40px,5.4vw,72px) clamp(16px,3vw,26px);display:grid;
  grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);gap:clamp(24px,4vw,58px);align-items:center}
.cli{background:var(--black);color:var(--on-black);border-radius:10px;overflow:hidden;font-family:var(--mono);
  font-size:12.5px;line-height:1.75}
.cli-bar{display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid rgba(255,255,255,.12)}
.cli-bar i{width:8px;height:8px;border-radius:999px;background:rgba(255,255,255,.24)}
.cli-bar span{margin-left:6px;font-size:10.5px;color:var(--on-black-3);letter-spacing:.1em}
.cli-body{padding:16px 18px 20px;overflow-x:auto}
.cli-body:focus-visible{outline:2.5px solid var(--paper);outline-offset:-3px}
.cli-body pre{margin:0;white-space:pre;font:inherit}
.cli .cm{color:var(--on-black-3)}
.cli .pr{color:var(--on-black-3)}
.cli .kw{color:var(--white);font-weight:700}
.cli .ok{color:var(--white)}
.cli .bar{color:var(--on-black-2)}
.cli-tabs{display:flex;gap:2px;padding:8px 12px 0}
.cli-tabs button{background:none;border:0;border-bottom:2px solid transparent;color:var(--on-black-3);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.11em;text-transform:uppercase;padding:6px 10px;
  cursor:pointer;transition:color .22s,border-color .22s}
.cli-tabs button:hover{color:var(--on-black-2)}
.cli-tabs button[aria-pressed="true"]{color:var(--white);border-bottom-color:var(--white)}
.cli-pane{display:none}
.cli-pane[data-on="1"]{display:block}

/* ---- pricing --------------------------------------------------------- */
.pricing{background:var(--paper);border-top:1px solid var(--line)}
.pricing-in{padding:clamp(40px,5.4vw,72px) clamp(16px,3vw,26px)}
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.plan{background:var(--paper);padding:26px 22px 28px;display:flex;flex-direction:column;gap:14px;
  transition:background .28s var(--ease)}
.plan:hover{background:var(--white)}
.plan.hot{background:var(--black);color:var(--on-black)}
.plan.hot:hover{background:#0C0C0C}
.plan.hot .nm,.plan.hot .desc,.plan.hot li{color:var(--on-black-2)}
.plan.hot li svg{color:var(--white)}
.plan .nm{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint)}
.plan .pr{font-size:clamp(1.9rem,3.2vw,2.5rem);font-weight:600;letter-spacing:-.05em;line-height:1;
  font-variant-numeric:lining-nums}
.plan .pr small{font-size:13px;font-weight:500;color:var(--faint);letter-spacing:-.01em}
.plan.hot .pr small{color:var(--on-black-3)}
.plan .desc{font-size:13.2px;color:var(--muted);margin:0}
.plan ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.plan li{display:flex;gap:9px;font-size:13.2px;color:var(--muted);line-height:1.45}
.plan li svg{width:14px;height:14px;flex:none;margin-top:3px;color:var(--ink)}
.plan .btn{width:100%;margin-top:auto}

/* ---- black outro ----------------------------------------------------- */
.outro{position:relative;padding:clamp(60px,8vw,120px) 0 clamp(40px,5vw,70px);overflow:hidden}
.outro .wrap{position:relative;z-index:1;text-align:center;color:var(--on-black)}
.outro h2{color:var(--white);margin-bottom:16px}
.outro p{color:var(--on-black-2);max-width:46ch;margin:0 auto 28px}
.outro .row{display:flex;gap:11px;justify-content:center;flex-wrap:wrap}
.foot{position:relative;z-index:1;border-top:1px solid var(--edge);margin-top:clamp(52px,6vw,88px)}
.foot-top{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,.7fr));gap:clamp(20px,3.6vw,44px);
  padding:clamp(34px,4.4vw,54px) 0}
.foot .logo{color:var(--on-black)}
.foot .logo .m{background:var(--paper)}
.foot .logo .m svg{color:var(--black)}
.foot-brand p{color:var(--on-black-3);font-size:13.2px;max-width:30ch;margin:14px 0 0}
.fcol h3,.fcol h4{font-size:12.5px;font-weight:600;margin:0 0 13px;color:var(--on-black)}
.fcol ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.fcol a{font-size:13.2px;color:var(--on-black-3);text-decoration:none;transition:color .22s}
.fcol a:hover{color:var(--white)}
.foot-bar{border-top:1px solid var(--edge);padding-block:18px;display:flex;justify-content:space-between;gap:14px;
  flex-wrap:wrap;font-family:var(--mono);font-size:10px;letter-spacing:.11em;text-transform:uppercase;color:var(--on-black-3)}
.foot-bar a{color:var(--on-black);text-decoration:underline;text-underline-offset:3px}

/* ---- reveal ---------------------------------------------------------- */
.js .rv{opacity:0;transform:translateY(20px);transition:opacity .72s var(--ease),transform .72s var(--ease)}
.js .rv.in{opacity:1;transform:none}
.js .rv-d1{transition-delay:.07s}.js .rv-d2{transition-delay:.14s}.js .rv-d3{transition-delay:.21s}

/* ---- responsive ------------------------------------------------------ */
@media (max-width:1080px){
  .hero-top{grid-template-columns:1fr;gap:26px}
  .hero h1{max-width:none}
  .srow{grid-template-columns:repeat(2,1fr);gap:22px}
  .mgrid,.plans{grid-template-columns:repeat(2,1fr)}
  .cli-in{grid-template-columns:1fr;gap:28px}
  .foot-top{grid-template-columns:repeat(2,1fr)}
  .foot-brand{grid-column:1/-1}
}
@media (max-width:760px){
  .nav-links,.nav-actions{display:none}
  .nav[data-navopen="1"] .nav-links,.nav-in[data-navopen="1"] .nav-links{display:flex;flex-direction:column;
    gap:0;position:absolute;left:0;right:0;top:100%;z-index:90;margin:0;padding:6px 0;
    background:var(--white);backdrop-filter:blur(16px);border-top:1px solid var(--line);
    box-shadow:0 18px 40px -24px rgba(0,0,0,.6)}
  .nav[data-navopen="1"] .nav-links li,.nav-in[data-navopen="1"] .nav-links li{width:100%}
  .nav[data-navopen="1"] .nav-links a,.nav-in[data-navopen="1"] .nav-links a{display:flex;width:100%;
    padding:13px clamp(16px,4vw,26px);color:var(--ink);opacity:1;font-size:14px}
  .navtoggle{display:block}
  .srow,.mgrid,.plans{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
  .js .rv{opacity:1;transform:none}
  .js .flow{animation:none;stroke-dasharray:none;opacity:.6}
  .js .node.live{animation:none}
}

/* skip link — fixed, so it is reachable no matter how far the page has scrolled */
.skip{position:fixed;left:12px;top:-80px;z-index:999;padding:11px 18px;border-radius:8px;
  background:#111;color:#fff;font-size:14px;font-weight:600;text-decoration:none;
  box-shadow:0 10px 30px -12px rgba(0,0,0,.6);transition:top .2s ease}
.skip:focus{top:12px}

#backToStudio{position:fixed;left:16px;bottom:16px;z-index:2147483000;display:none;align-items:center;
  padding:9px 15px;border-radius:999px;background:rgba(12,13,16,.84);color:#f5f2ea;
  border:1px solid rgba(255,255,255,.18);text-decoration:none;backdrop-filter:blur(10px);
  font:500 11.5px/1 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.07em;
  box-shadow:0 12px 34px -14px rgba(0,0,0,.75);transition:transform .2s ease,background .2s ease,color .2s ease}
#backToStudio:hover{background:#F3B54B;color:#151107;border-color:#F3B54B;transform:translateY(-2px)}
#backToStudio:focus-visible{outline:2px solid #F3B54B;outline-offset:3px}
@media (prefers-reduced-motion:reduce){#backToStudio{transition:none}#backToStudio:hover{transform:none}}
@media print{#backToStudio{display:none!important}}

/* =========================================================================
   MULTI-PAGE — product / models / docs / pricing.
   Same blueprint sheet, same two faces; nothing here restyles the index.
   ========================================================================= */
.nav-links a[aria-current="page"]{color:var(--ink)}
.nav-links a[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--ink)}
.nav-links li{position:relative}

.phead{padding:clamp(30px,4.4vw,54px) clamp(16px,3vw,26px) clamp(22px,3vw,34px);border-bottom:1px solid var(--line)}
.crumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 16px;padding:0;list-style:none;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.crumb a{color:var(--ink-2);text-decoration:none;border-bottom:1px solid transparent}
.crumb a:hover{border-bottom-color:var(--ink)}
.crumb li+li::before{content:"/";margin-right:8px;color:var(--line-2)}
.crumb [aria-current="page"]{color:var(--ink)}
.phead h1{font-size:clamp(2.1rem,4.6vw,3.5rem);line-height:1.02;letter-spacing:-.035em;margin:0 0 14px;font-weight:600}
.phead .lede{max-width:62ch;margin:0}

/* ---- docs: persistent sidebar + on-this-page rail ---- */
.docs{display:grid;grid-template-columns:216px minmax(0,1fr) 180px;gap:clamp(20px,3vw,44px);
  padding:clamp(24px,3.4vw,40px) clamp(16px,3vw,26px) clamp(40px,5vw,72px);align-items:start}
.docside{position:sticky;top:24px;max-height:calc(100vh - 48px);overflow-y:auto;
  border-right:1px solid var(--line);padding-right:16px}
.docside .grp{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin:20px 0 8px}
.docside .grp:first-child{margin-top:0}
.docside ul{list-style:none;margin:0 0 4px;padding:0}
.docside a{display:block;padding:6px 10px;border-radius:5px;font-size:13.5px;color:var(--ink-2);
  text-decoration:none;transition:background .2s,color .2s}
.docside a:hover{background:var(--paper-2);color:var(--ink)}
.docside a[aria-current="true"]{background:var(--ink);color:var(--paper)}

.docmain{min-width:0}
.docmain h1{font-size:clamp(1.8rem,3.4vw,2.6rem);line-height:1.05;letter-spacing:-.03em;margin:0 0 10px;font-weight:600}
.docmain h2{font-size:clamp(1.25rem,2vw,1.6rem);letter-spacing:-.02em;margin:38px 0 12px;font-weight:600;
  scroll-margin-top:24px;padding-top:10px;border-top:1px solid var(--line)}
.docmain h3{font-size:1.02rem;margin:24px 0 8px;font-weight:600}
.docmain p{color:var(--ink-2);line-height:1.72;margin:0 0 14px;max-width:70ch}
.docmain ul.plain{margin:0 0 16px;padding-left:19px;color:var(--ink-2);line-height:1.72;max-width:70ch}
.docmain ul.plain li{margin-bottom:6px}
.docmain code{font-family:var(--mono);font-size:.88em;background:var(--paper-2);border:1px solid var(--line);
  border-radius:4px;padding:1px 5px}
.docmain .note{border:1px solid var(--line-2);background:var(--white);padding:14px 16px;margin:0 0 18px;
  max-width:70ch;font-size:14px;color:var(--ink-2);line-height:1.62}
.docmain .note b{color:var(--ink)}
pre.code{font-family:var(--mono);font-size:12.5px;line-height:1.72;background:var(--black);color:var(--on-black);
  padding:16px 18px;overflow-x:auto;margin:0 0 18px;max-width:100%;border:1px solid var(--black)}
pre.code .c{color:var(--on-black-3)}
pre.code .k{color:var(--white);font-weight:500}
.docrail{position:sticky;top:24px}
.docrail h2{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin:0 0 10px;font-weight:400}
.docrail ul{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.docrail a{display:block;padding:5px 0 5px 12px;margin-left:-1px;border-left:1px solid transparent;
  font-size:12.5px;color:var(--muted);text-decoration:none;line-height:1.45}
.docrail a:hover{color:var(--ink)}
.docrail a[aria-current="true"]{color:var(--ink);border-left-color:var(--ink)}

/* ---- comparison table (models + pricing) ---- */
.cmp-wrap{overflow-x:auto;border:1px solid var(--line);background:var(--white)}
.cmp{width:100%;border-collapse:collapse;min-width:660px}
.cmp caption{text-align:left;padding:16px 18px;font-weight:600;font-size:1.05rem;border-bottom:1px solid var(--line)}
.cmp th,.cmp td{text-align:left;padding:13px 18px;border-bottom:1px solid var(--line);font-size:13.5px;vertical-align:top}
.cmp thead th{font-family:var(--mono);font-size:10.5px;letter-spacing:.11em;text-transform:uppercase;
  color:var(--muted);font-weight:400;background:var(--paper-2)}
.cmp tbody th{font-weight:600;color:var(--ink);white-space:nowrap}
.cmp td.num{font-family:var(--mono);font-size:12.5px}
.cmp tbody tr:hover{background:var(--paper-2)}
.cmp .yes{color:var(--ink);font-weight:600}
.cmp .no{color:var(--line-2)}
.cmp tr:last-child th,.cmp tr:last-child td{border-bottom:0}

/* ---- pricing: billing toggle ---- */
.billrow{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin:0 0 26px}
.seg{display:inline-flex;border:1px solid var(--line-2);background:var(--white)}
.seg button{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  padding:9px 16px;border:0;background:transparent;color:var(--muted);cursor:pointer;transition:background .2s,color .2s}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
.saving{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--muted)}

@media (max-width:1080px){
  .docs{grid-template-columns:200px minmax(0,1fr)}
  .docrail{display:none}
}
@media (max-width:760px){
  .docs{grid-template-columns:1fr;gap:18px}
  .docside{position:static;max-height:none;border-right:0;border-bottom:1px solid var(--line);
    padding-right:0;padding-bottom:14px}
  .docside ul{display:flex;flex-wrap:wrap;gap:4px}
  .docside .grp{margin:12px 0 6px}
}


/* ---- fixes from the QA + review pass ----------------------------------- */

/* QA: #B4B4B4 on white is 2.07:1. The "not included" cell has to be readable. */
.cmp .no{color:var(--muted)}

/* QA: a grid item defaults to min-width:auto, so the collapsed sidebar sized to
   its own max-content and blew the page out horizontally at 375. */
.docs>*{min-width:0}
.docside,.docmain,.docrail{min-width:0}

/* Review: the persistent docs sidebar had no active-page state. */
.docside a[aria-current="true"]{background:var(--ink);color:var(--paper)}

/* Review: horizontally scrollable regions are focusable now, so they need a ring. */
.cmp-wrap:focus-visible,pre.code:focus-visible{outline:2px solid var(--ink);outline-offset:2px}