@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(/assets/fonts/ibm-plex-mono-400.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(/assets/fonts/ibm-plex-mono-500.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-weight: 400;
  font-stretch: 100%;
  font-display: swap;
  src: url(/assets/fonts/instrument-sans.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-weight: 500;
  font-stretch: 100%;
  font-display: swap;
  src: url(/assets/fonts/instrument-sans.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-weight: 600;
  font-stretch: 100%;
  font-display: swap;
  src: url(/assets/fonts/instrument-sans.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-weight: 700;
  font-stretch: 100%;
  font-display: swap;
  src: url(/assets/fonts/instrument-sans.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root{
  color-scheme: light;
  --bg:#F2F4F6;
  --paper:#FAFBFC;
  --white:#FFFFFF;
  --line:#D3D9E0;
  --line-2:#E3E7EC;
  --ink:#0C1015;
  --ink-2:#343C47;
  --mute:#6A737F;
  --faint:#9AA3AE;
  --blue:#0A5BFF;
  --blue-soft:rgba(10,91,255,.08);
  --green:#17B05A;
  --sans:"Instrument Sans","Figtree","Helvetica Neue",Helvetica,Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --max:1280px;
  --gut:clamp(16px,4vw,48px);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden;
  background-image:
    linear-gradient(to right, rgba(12,16,21,.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(12,16,21,.035) 1px, transparent 1px);
  background-size:32px 32px;
}
a{color:inherit}
img,svg{display:block;max-width:100%}
::selection{background:var(--blue);color:#fff}
.sprite{position:absolute;width:0;height:0}

/* ---------- layout ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.mono{font-family:var(--mono)}
.label{
  font:500 11px/1.4 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--mute);
}
.label b{color:var(--blue);font-weight:500}
.sec .label--lead{margin:0 0 14px}
.rule{height:1px;background:var(--line)}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;background:rgba(242,244,246,.86);
  backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav .wrap{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:600;font-size:17px;letter-spacing:-.01em}
.brandmark{width:28px;height:28px;border-radius:7px;background:url(/assets/icon-256.png) center/cover no-repeat;flex:none;box-shadow:0 0 0 1px rgba(12,16,21,.08)}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:14px;color:var(--ink-2)}
.nav-links a{text-decoration:none}
.nav-links a:hover{color:var(--blue)}
@media (max-width:860px){.nav-links{display:none}.nav .badge{margin-left:auto}}

/* ---------- App Store badge ---------- */
.badge{
  display:inline-flex;align-items:center;gap:9px;background:#000;color:#fff;text-decoration:none;
  border-radius:999px;padding:9px 20px 9px 16px;line-height:1;white-space:nowrap;
  box-shadow:0 1px 0 rgba(255,255,255,.12) inset, 0 6px 18px -8px rgba(12,16,21,.45);
  transition:transform .2s ease, box-shadow .2s ease;
}
.badge:hover{transform:translateY(-1px);box-shadow:0 1px 0 rgba(255,255,255,.12) inset,0 10px 24px -10px rgba(10,91,255,.55)}
.badge svg{width:22px;height:22px;fill:#fff;flex:none;margin-top:-2px}
.badge span{display:flex;flex-direction:column;gap:3px}
.badge small{font:500 10px/1 var(--sans);letter-spacing:.02em;opacity:.85}
.badge strong{font:600 17px/1 var(--sans);letter-spacing:-.01em}
.badge.sm{padding:7px 15px 7px 12px;gap:7px}
.badge.sm svg{width:17px;height:17px}
.badge.sm small{font-size:8.5px}
.badge.sm strong{font-size:13.5px}
.badge.lg{padding:12px 26px 12px 20px;gap:11px}
.badge.lg svg{width:28px;height:28px}
.badge.lg small{font-size:11.5px}
.badge.lg strong{font-size:21px}

/* ---------- hero ---------- */
.hero{padding:72px 0 24px;position:relative}
.hero-top{display:grid;grid-template-columns:3fr 2fr;gap:48px;align-items:end}
.hero h1{
  font-weight:600;font-size:clamp(40px,5.3vw,76px);line-height:1;letter-spacing:-.035em;margin:18px 0 0;
}
.hero h1 em{font-style:normal;color:var(--blue)}
.lede{font-size:clamp(17px,1.5vw,20px);color:var(--ink-2);margin:0 0 26px;max-width:34em}
.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px}
.textlink{font:500 13px/1 var(--mono);letter-spacing:.04em;text-transform:uppercase;text-decoration:none;color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:4px}
.textlink:hover{color:var(--blue);border-color:var(--blue)}
.meta{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:22px}
.meta span::before{content:"";display:inline-block;width:5px;height:5px;background:var(--blue);margin:0 8px 1px 0;vertical-align:middle}

.fig{margin:44px 0 0;position:relative;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.fig-head,.fig-foot{display:flex;justify-content:space-between;gap:16px;padding:10px 0}
.fig-foot{border-top:1px solid var(--line-2)}
.fig svg{width:100%;height:auto}
.legend{display:none;list-style:none;margin:0;padding:12px 0 4px;border-top:1px solid var(--line-2)}
.legend li{display:grid;grid-template-columns:28px 1fr;gap:6px;padding:6px 0;font-size:14px;color:var(--ink-2)}
.legend li b{font:500 12px/20px var(--mono);color:var(--blue)}
.legend li strong{color:var(--ink);font-weight:600}

/* svg drawing styles (shared) */
.iso .ft{fill:#FFFFFF;stroke:#1A2029;stroke-width:1;stroke-linejoin:round}
.iso .ff{fill:#EEF1F4;stroke:#1A2029;stroke-width:1;stroke-linejoin:round}
.iso .fr{fill:#DDE2E8;stroke:#1A2029;stroke-width:1;stroke-linejoin:round}
.iso .grid line{stroke:#C9D0D8;stroke-width:.6}
.iso .thin{fill:none;stroke:#1A2029;stroke-width:.7}
.iso .hair{fill:none;stroke:#8C96A2;stroke-width:.6}
.iso .scr{fill:#F7F9FB;stroke:#1A2029;stroke-width:.8}
.iso .win{fill:#FFFFFF;stroke:#5E6874;stroke-width:.6}
.iso .tile{fill:#E8EEF8;stroke:#1A2029;stroke-width:.6}
.iso .acc{fill:var(--blue)}
.iso .accs{fill:none;stroke:var(--blue)}
.iso .grn{fill:var(--green)}
.iso .t{font-family:var(--mono);fill:#1A2029}
.iso .ts{font-family:var(--sans);fill:#1A2029}
.iso .tm{font-family:var(--mono);fill:#6A737F}
.iso .tb{font-family:var(--mono);fill:var(--blue)}
.iso .path-base{fill:none;stroke:rgba(10,91,255,.22);stroke-width:5;stroke-linejoin:round;stroke-linecap:round}
.iso .path-line{fill:none;stroke:var(--blue);stroke-width:1.6;stroke-linejoin:round;stroke-linecap:round}
.iso .path-flow{fill:none;stroke:var(--blue);stroke-width:2.6;stroke-linejoin:round;stroke-linecap:round;stroke-dasharray:14 26;animation:flow 1.6s linear infinite}
@keyframes flow{to{stroke-dashoffset:-40}}
.iso .dim{fill:none;stroke:#59636F;stroke-width:.8}
.iso .lead{fill:none;stroke:#1A2029;stroke-width:.8}
.iso .node{fill:#fff;stroke:var(--blue);stroke-width:1.6}
.iso .node-core{fill:var(--blue)}
.iso .pulse{fill:none;stroke:var(--blue);stroke-width:1;transform-box:fill-box;transform-origin:center;animation:pulse 2.4s ease-out infinite}
@keyframes pulse{0%{transform:scale(.6);opacity:.9}100%{transform:scale(2.6);opacity:0}}
.iso .co-badge rect{fill:var(--ink)}
.iso .co-badge text{font-family:var(--mono);font-weight:500;fill:#fff}
.iso .co-title{font-family:var(--mono);font-weight:500;fill:#0C1015;letter-spacing:.06em}
.iso .co-sub{font-family:var(--sans);fill:#4A535E}
.iso .packet{fill:var(--blue)}
.iso .glow{fill:var(--blue);opacity:.18}

@media (max-width:700px){
  .hero-fig .co-text{display:none}
  .hero-fig .co-badge rect{transform-box:fill-box;transform-origin:center;transform:scale(2.2)}
  .hero-fig .co-badge text{font-size:30px}
  .legend{display:block}
}

/* ---------- sections ---------- */
section{position:relative}
.sec{padding:112px 0}
.sec + .sec{border-top:1px solid var(--line)}
.sec-head{display:grid;grid-template-columns:3fr 9fr;gap:48px;margin-bottom:56px}
.sec-head > .label{padding-top:12px;border-top:1px solid var(--ink);align-self:start}
h2{font-weight:600;font-size:clamp(32px,4.2vw,58px);line-height:1.02;letter-spacing:-.03em;margin:0 0 18px;max-width:16em}
h3{font-weight:600;font-size:22px;letter-spacing:-.015em;line-height:1.2;margin:0 0 10px}
.sec p{margin:0 0 14px;color:var(--ink-2)}
.big{font-size:clamp(18px,1.6vw,21px);max-width:36em}
.crop{position:absolute;width:14px;height:14px;border-color:var(--ink);border-style:solid;opacity:.5}
.crop.tl{top:-1px;left:calc(var(--gut) - 7px);border-width:1px 0 0 1px}
.crop.tr{top:-1px;right:calc(var(--gut) - 7px);border-width:1px 1px 0 0}

/* spec table */
.spec{display:grid;grid-template-columns:1fr;border-top:1px solid var(--ink);margin:0}
.spec > div{display:grid;grid-template-columns:minmax(120px,190px) 1fr;gap:20px;padding:15px 0;border-bottom:1px solid var(--line)}
.spec dt,.spec .k{font:500 11px/1.9 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--mute)}
.spec dd,.spec .v{margin:0;color:var(--ink)}
.spec .v small{display:block;color:var(--mute);font-size:14px}

.split{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:start}

/* roles */
.roles{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.role{padding:36px 40px 40px 0;position:relative}
.role + .role{padding:36px 0 40px 40px;border-left:1px solid var(--line)}
.role .glyph{width:100%;max-width:380px;height:auto;margin:6px 0 26px}
.role ul{list-style:none;margin:20px 0 0;padding:0;border-top:1px solid var(--line-2)}
.role li{display:grid;grid-template-columns:110px 1fr;gap:14px;padding:11px 0;border-bottom:1px solid var(--line-2);font-size:15px;color:var(--ink-2)}
.role li .k{font:500 10.5px/1.9 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--mute)}
.note{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px 14px;align-items:baseline;font-size:15px;color:var(--ink-2)}
.note .label{flex:none}
.g line,.g rect,.g circle,.g path,.g polyline{vector-effect:non-scaling-stroke}

/* timing diagram */
.timing{border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:0 0 18px;background:linear-gradient(var(--paper),var(--paper)) padding-box}
.tm-events{display:grid;grid-template-columns:150px 1fr;}
.tm-events .ax{position:relative;height:64px}
.tm-ev{position:absolute;top:14px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:4px}
.tm-ev b{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--ink);color:#fff;font:500 11px/1 var(--mono)}
.tm-row{display:grid;grid-template-columns:150px 1fr;align-items:center;border-top:1px solid var(--line-2)}
.tm-row .k{font:500 11px/1 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--ink-2);padding:0 0 0 16px}
.tm-track{position:relative;height:58px}
.tm-track::before{content:"";position:absolute;left:0;right:0;top:39px;height:1px;background:var(--faint)}
.seg{position:absolute;top:19px;height:20px;border:1.5px solid var(--ink);border-bottom:0;background:var(--blue-soft)}
.seg.on{background:repeating-linear-gradient(135deg,rgba(10,91,255,.16) 0 2px,transparent 2px 7px);border-color:var(--blue)}
.seg.grn{border-color:var(--green);background:rgba(23,176,90,.12)}
.seg.idle{border-style:dashed;border-color:var(--faint);background:transparent}
.seg span{position:absolute;left:8px;top:-17px;font:500 10px/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--mute);white-space:nowrap}
.seg--a{left:0;width:100%}
.seg--b{left:16%;width:70%}
.seg--c{left:38%;width:28%}
.x16{left:16%}
.x38{left:38%}
.x66{left:66%}
.x86{left:86%}
.vline{position:absolute;top:0;bottom:0;width:0;border-left:1px dashed rgba(10,91,255,.45)}
.tm-body{position:relative}
.tm-grid{position:absolute;left:150px;right:0;top:0;bottom:0;pointer-events:none}
.tm-key{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:18px 16px 0}
.tm-key div{font-size:14px;color:var(--ink-2);display:grid;grid-template-columns:26px 1fr;gap:4px}
.tm-key b{font:500 11px/20px var(--mono);color:var(--blue)}
.menubar{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--line);background:var(--white);padding:6px 12px;border-radius:6px;font:500 12px/1 var(--mono);color:var(--ink-2)}
.menubar i{width:16px;height:12px;border-radius:3px;display:inline-block;border:1.5px solid var(--ink)}
.menubar i.on{border-color:var(--green);background:var(--green)}

/* exploded */
.exp-wrap{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:start}
.exp{margin:0}
.exp svg{width:100%;height:auto}
.exp figcaption{margin-top:12px}

/* pairing */
.pair{display:grid;grid-template-columns:6fr 6fr;gap:64px}
.stack{display:grid;gap:20px}
.steps{list-style:none;margin:0;padding:0;border-top:1px solid var(--ink)}
.steps li{display:grid;grid-template-columns:56px 1fr;gap:12px;padding:20px 0;border-bottom:1px solid var(--line)}
.steps li b{font:500 13px/1.6 var(--mono);color:var(--blue)}
.steps li strong{display:block;font-weight:600;color:var(--ink);margin-bottom:2px}
.steps li span{color:var(--ink-2);font-size:15.5px}
.panel{background:var(--white);border:1px solid var(--line);position:relative}
.panel-h{display:flex;justify-content:space-between;align-items:center;padding:11px 16px;border-bottom:1px solid var(--line-2)}
.panel-b{padding:22px 16px}
.code{display:grid;grid-template-columns:repeat(8,1fr);gap:6px;max-width:440px}
.code span{aspect-ratio:3/4;display:grid;place-items:center;border:1px solid var(--line);border-bottom:2px solid var(--ink);font:500 clamp(20px,3vw,30px)/1 var(--mono);background:var(--paper)}
.timer{display:flex;align-items:center;gap:12px;margin-top:16px}
.timer .bar{flex:1;height:2px;background:var(--line-2);position:relative;overflow:hidden}
.timer .bar i{position:absolute;inset:0;background:var(--blue);transform-origin:left;animation:drain 120s linear infinite}
@keyframes drain{from{transform:scaleX(1)}to{transform:scaleX(0)}}
.dev{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;padding:12px 16px;border-top:1px solid var(--line-2);font-size:15px}
.dev small{display:block;font:400 11.5px/1.5 var(--mono);color:var(--mute)}
.dev .btn{font:500 11px/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--line);padding:7px 10px;border-radius:4px;color:var(--ink-2);background:var(--paper)}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--green);margin-right:6px;vertical-align:1px}
.addr{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:14px}
.field{font:500 14px/1 var(--mono);padding:10px 12px;border:1px solid var(--line);background:var(--white);min-width:200px}
.field i{font-style:normal;color:var(--faint)}

/* security */
.sec-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.sec-grid > div{padding:26px 24px 30px 0}
.sec-grid > div + div{padding-left:24px;border-left:1px solid var(--line)}
.sec-grid .label{display:block;margin-bottom:28px}
.sec-grid strong{display:block;font-size:20px;font-weight:600;letter-spacing:-.015em;line-height:1.2;margin-bottom:8px}
.sec-grid p{font-size:15px;margin:0}
.sec-fig{margin-top:48px}

/* picture */
.pro-tag{display:inline-flex;align-items:center;gap:8px;font:500 11px/1 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--blue);border:1px solid var(--blue);padding:6px 10px;border-radius:999px;margin-bottom:18px}
.params{border-top:1px solid var(--ink);margin-top:28px}
.params div{display:grid;grid-template-columns:1fr auto;gap:16px;padding:13px 0;border-bottom:1px solid var(--line);font-size:15.5px}
.params div span:last-child{font:400 12.5px/1.8 var(--mono);color:var(--mute);text-align:right}
.ticks{display:flex;gap:3px;align-items:flex-end;height:14px}
.ticks i{width:1px;background:var(--faint);height:6px}
.ticks i:nth-child(5n+1){height:12px;background:var(--ink-2)}

/* apps */
.apps{display:flex;flex-wrap:wrap;border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.apps span{flex:1 1 180px;padding:26px 0;font-size:clamp(20px,2.2vw,28px);font-weight:500;letter-spacing:-.02em;border-right:1px solid var(--line);padding-left:20px}
.apps span:first-child{padding-left:0}
.apps span:last-child{border-right:0;color:var(--mute)}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.plan{padding:30px 28px 34px 0;display:flex;flex-direction:column}
.plan + .plan{padding-left:28px;border-left:1px solid var(--line)}
.plan.hl{background:linear-gradient(var(--white),var(--white));box-shadow:inset 0 3px 0 var(--blue)}
.plan .price{font-weight:600;font-size:clamp(40px,4.4vw,60px);letter-spacing:-.04em;line-height:1;margin:22px 0 4px}
.plan .price small{font-size:17px;font-weight:500;letter-spacing:0;color:var(--mute);margin-left:4px}
.plan .per{font:400 12.5px/1.5 var(--mono);color:var(--mute);min-height:38px}
.plan ul{list-style:none;padding:0;margin:22px 0 0;border-top:1px solid var(--line-2)}
.plan li{padding:10px 0 10px 22px;border-bottom:1px solid var(--line-2);font-size:15px;color:var(--ink-2);position:relative}
.plan li::before{content:"";position:absolute;left:2px;top:18px;width:9px;height:1.5px;background:var(--ink)}
.plan li.y::before{width:7px;height:7px;top:16px;border-radius:50%;background:var(--blue)}
.plan li.n{color:var(--faint)}
.plan li.n::before{background:var(--faint)}
.fine{margin-top:18px;font:400 12.5px/1.7 var(--mono);color:var(--mute)}

/* requirements */
.req-block{margin-top:72px}
.req{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--ink)}
.req > div{padding:22px 24px 24px 0;border-bottom:1px solid var(--line)}
.req > div + div{padding-left:24px;border-left:1px solid var(--line)}
.req strong{display:block;font-size:20px;font-weight:600;letter-spacing:-.015em;margin:12px 0 4px}
.req p{margin:0;font-size:15px}

/* closing */
.close{padding:128px 0 120px;text-align:left;border-top:1px solid var(--line);position:relative;overflow:hidden}
.close .wrap{position:relative}
.close h2{font-size:clamp(38px,6vw,84px);max-width:13em;margin-top:18px}
.close .big{color:var(--ink-2);margin:0 0 30px}
.close .bp{position:absolute;right:-40px;top:40px;width:min(560px,60vw);opacity:.9;pointer-events:none}

/* footer */
footer{border-top:1px solid var(--ink);padding:28px 0 72px;font-size:14px;color:var(--mute)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;align-items:center}
footer nav{display:flex;flex-wrap:wrap;gap:6px 0}
footer nav a{text-decoration:none;color:var(--ink-2)}
footer nav a:hover{color:var(--blue)}
footer nav span{margin:0 10px;color:var(--faint)}

/* ---------- secondary pages ---------- */
.faint{color:var(--faint)}
.narrow{max-width:820px}
.doc{padding:72px 0 96px}
.doc h1{font-weight:600;font-size:clamp(36px,5vw,60px);line-height:1.02;letter-spacing:-.035em;margin:0 0 14px}
.doc__meta{font:500 11px/1.6 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--mute);margin:0 0 40px;padding-bottom:18px;border-bottom:1px solid var(--ink)}
.doc h2{font-size:clamp(24px,2.6vw,32px);line-height:1.1;letter-spacing:-.025em;margin:52px 0 14px;max-width:none}
.doc h3{font-size:19px;margin:30px 0 8px}
.doc p{margin:0 0 16px;color:var(--ink-2)}
.doc strong{color:var(--ink);font-weight:600}
.doc a{color:var(--blue);text-underline-offset:3px}
.doc a:hover{color:var(--ink)}
.doc ul,.doc ol{margin:0 0 20px;padding-left:1.4em;color:var(--ink-2)}
.doc li{margin:0 0 8px;padding-left:4px}
.doc li::marker{color:var(--blue);font-family:var(--mono)}
.doc code{font:500 .86em/1 var(--mono);background:var(--white);border:1px solid var(--line);border-radius:4px;padding:2px 6px;color:var(--ink)}
.doc pre{margin:0 0 20px;padding:16px 18px;background:var(--white);border:1px solid var(--line);border-left:2px solid var(--blue);overflow-x:auto;font:400 14px/1.6 var(--mono);color:var(--ink)}
.doc pre code{background:none;border:0;padding:0;font:inherit}
.doc hr{border:0;border-top:1px solid var(--line);margin:48px 0 24px}
.doc details{border-top:1px solid var(--line)}
.doc details:last-of-type{border-bottom:1px solid var(--line)}
.doc summary{cursor:pointer;list-style:none;padding:16px 28px 16px 0;font-weight:600;color:var(--ink);position:relative}
.doc summary::-webkit-details-marker{display:none}
.doc summary::after{content:"+";position:absolute;right:4px;top:14px;font:500 18px/1.4 var(--mono);color:var(--blue)}
.doc details[open] > summary::after{content:"\2212"}
.doc summary:hover{color:var(--blue)}
.doc details p:last-child{margin-bottom:18px}
.doc table{width:100%;border-collapse:collapse;margin:0 0 24px;font-size:15px}
.doc th{font:500 11px/1.4 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--mute);text-align:left;padding:10px 14px 10px 0;border-bottom:1px solid var(--ink)}
.doc td{padding:12px 14px 12px 0;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top}
.doc .faint{color:var(--faint)}

.btn{display:inline-flex;align-items:center;font:500 13px/1 var(--mono);letter-spacing:.04em;text-transform:uppercase;text-decoration:none;padding:14px 20px;border:1px solid var(--ink);border-radius:999px;color:var(--ink);background:transparent;transition:background .2s ease,color .2s ease,border-color .2s ease}
.btn:hover{border-color:var(--blue);color:var(--blue)}
.btn--primary{background:var(--ink);color:#fff}
.btn--primary:hover{background:var(--blue);border-color:var(--blue);color:#fff}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--ink-2)}
.btn--sm{padding:9px 14px;font-size:11px}

/* 404 */
.lost{padding:120px 0 140px;min-height:60vh}
.lost .wrap{max-width:820px}
.lost h1{font-weight:600;font-size:clamp(40px,6vw,76px);line-height:1;letter-spacing:-.035em;margin:18px 0 20px}
.lost p{color:var(--ink-2);margin:0 0 28px;max-width:34em}
.lost .ch{font:500 11px/1.4 var(--mono);letter-spacing:.09em;text-transform:uppercase;color:var(--mute);margin:0;display:flex;align-items:center;gap:10px}
.tally{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green)}
.tally--off{background:transparent;border:1.5px solid var(--faint)}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .hero-top,.split,.exp-wrap,.pair{grid-template-columns:1fr;gap:40px}
  .sec-head{grid-template-columns:1fr;gap:18px;margin-bottom:40px}
  .sec-grid{grid-template-columns:1fr 1fr}
  .sec-grid > div:nth-child(3){padding-left:0;border-left:0}
  .sec-grid > div:nth-child(n+3){border-top:1px solid var(--line)}
  .close .bp{opacity:.25}
  .tm-key{grid-template-columns:1fr 1fr}
}
@media (max-width:700px){
  body{font-size:16px}
  .hero{padding:44px 0 16px}
  .sec{padding:76px 0}
  .doc{padding:44px 0 64px}
  .lost{padding:72px 0 88px}
  .roles,.plans,.req{grid-template-columns:1fr}
  .role,.role + .role{padding:28px 0;border-left:0}
  .role + .role{border-top:1px solid var(--line)}
  .plan,.plan + .plan{padding:26px 16px 28px;border-left:0}
  .plan + .plan{border-top:1px solid var(--line)}
  .plan:first-child{padding-left:0;padding-right:0}
  .req > div + div{padding-left:0;border-left:0}
  .sec-grid{grid-template-columns:1fr}
  .sec-grid > div,.sec-grid > div + div{padding:22px 0;border-left:0}
  .sec-grid > div + div{border-top:1px solid var(--line)}
  .sec-grid .label{margin-bottom:12px}
  .spec > div{grid-template-columns:1fr;gap:4px}
  .role li{grid-template-columns:1fr;gap:2px}
  .tm-events,.tm-row{grid-template-columns:84px 1fr}
  .tm-grid{left:84px}
  .tm-row .k{padding-left:0;font-size:10px}
  .seg span{display:none}
  .tm-key{grid-template-columns:1fr;gap:10px;padding:16px 0 0}
  .apps span{flex-basis:50%;padding:18px 0 18px 0;border-right:0;border-bottom:1px solid var(--line-2)}
  .fig-head .label:last-child{display:none}
  .close{padding:84px 0}
  .close .bp{display:none}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}