/* send25 — shared stylesheet.
   Palette sampled from the parent brand: signal red on charcoal (the machine),
   warm off-white in light mode (the paper it produces). Brand red is structural;
   status green/amber stay semantic so a panel still reads like a panel. */
:root{
  --ground:#191919; --panel:#232323; --panel-2:#2C2C2C;
  --ink:#F4F3F1; --ink-2:#ABA9A5; --ink-3:#7A7876; --line:#3A3A3A;
  --signal:#D8353A; --signal-ink:#FFFFFF; --ok:#57B87E; --warn:#E0A33C;
  --shadow:rgba(0,0,0,.5); --grid:rgba(255,255,255,.025);
}
@media (prefers-color-scheme: light){
  :root{
    --ground:#E5E3DF; --panel:#FCFBF9; --panel-2:#F3F1ED;
    --ink:#1E1E1E; --ink-2:#55534F; --ink-3:#82807C; --line:#D6D3CD;
    --signal:#C9282D; --signal-ink:#FFFFFF; --ok:#2E7D52; --warn:#8A5B00;
    --shadow:rgba(40,35,30,.16); --grid:rgba(0,0,0,.022);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0; background:var(--ground); color:var(--ink);
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:17px; line-height:1.62; -webkit-font-smoothing:antialiased;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:46px 46px;
}
.mono{font-family:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace}
.wrap{max-width:1080px;margin:0 auto;padding:0 28px}
.narrow{max-width:820px}
a{color:inherit}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:2px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:12px;z-index:99;background:var(--signal);color:#fff;padding:10px 16px}

.eyebrow{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:11.5px;
  letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);display:flex;align-items:center;
  gap:10px;flex-wrap:wrap;margin:0}
.led{width:7px;height:7px;border-radius:50%;background:var(--ok);
  box-shadow:0 0 0 3px color-mix(in srgb,var(--ok) 22%,transparent);flex:none}

/* masthead */
.masthead{border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;
  background:color-mix(in srgb,var(--ground) 90%,transparent);backdrop-filter:blur(10px)}
.masthead .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding-top:15px;padding-bottom:15px}
.brand{font-weight:800;letter-spacing:-.03em;font-size:20px;display:inline-block;
  white-space:nowrap;text-decoration:none;color:inherit}
.brand em{font-style:normal;color:var(--signal)}
.mast-links{display:flex;gap:22px;font-size:14.5px;color:var(--ink-2);align-items:center}
.mast-links a{text-decoration:none;white-space:nowrap}
.mast-links a:hover,.mast-links a[aria-current="page"]{color:var(--ink)}
.mast-links a[aria-current="page"]{box-shadow:inset 0 -2px 0 var(--signal)}
.mast-cta{background:var(--signal);color:var(--signal-ink)!important;padding:8px 15px;font-weight:650}
.mast-cta:hover{filter:brightness(1.08)}
@media(max-width:820px){.mast-links a:not(.mast-cta){display:none}}

h1{font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.04;margin:20px 0 0;letter-spacing:-.045em;
  font-weight:800;text-wrap:balance}
h1 .thin{font-weight:400;color:var(--ink-2);letter-spacing:-.03em}
h2{font-size:clamp(1.5rem,2.9vw,2.05rem);letter-spacing:-.032em;font-weight:750;margin:0;
  text-wrap:balance}
h3{font-size:17px;font-weight:680;letter-spacing:-.012em;margin:0 0 6px}
.lede{font-size:19px;color:var(--ink-2);margin:22px 0 0;max-width:56ch}
.lede strong{color:var(--ink);font-weight:600}
.sec-lede{color:var(--ink-2);margin:14px 0 0;max-width:62ch;font-size:17px}
section{padding:66px 0;border-top:1px solid var(--line)}
section:first-of-type{border-top:0}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}

.btn{display:inline-flex;align-items:center;gap:9px;text-decoration:none;padding:13px 22px;
  font-weight:650;font-size:15px;border:1px solid transparent}
.btn-primary{background:var(--signal);color:var(--signal-ink);border-color:var(--signal)}
.btn-primary:hover{filter:brightness(1.07)}
.btn-ghost{border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink-3)}
.cta-row{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}

/* device panel */
.device{background:var(--panel);border:1px solid var(--line);
  box-shadow:0 24px 60px -28px var(--shadow);position:relative;overflow:hidden}
.device-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 18px;
  border-bottom:1px solid var(--line);background:var(--panel-2)}
.device-title{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:11.5px;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3)}
.device-body{padding:20px 18px}
.field{display:grid;grid-template-columns:150px 1fr;gap:8px 16px;padding:11px 0;
  border-bottom:1px dashed var(--line)}
.field:last-child{border-bottom:0}
.field dt{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;
  color:var(--ink-3);letter-spacing:.03em;padding-top:2px}
.field dd{margin:0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:15.5px;
  color:var(--ink);font-weight:600;word-break:break-word}
.field dd small{display:block;font-size:12.5px;color:var(--ink-3);font-weight:400;
  font-family:ui-sans-serif,system-ui,sans-serif;margin-top:3px;letter-spacing:0}
.yes{color:var(--ok)}
@media(max-width:520px){.field{grid-template-columns:1fr;gap:2px}}

.toggle{display:flex;margin:0 0 6px;border:1px solid var(--line);background:var(--panel-2)}
.toggle button{flex:1;appearance:none;background:transparent;border:0;cursor:pointer;color:var(--ink-3);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:11.5px;letter-spacing:.1em;
  text-transform:uppercase;padding:10px 8px;border-bottom:2px solid transparent;
  transition:color .15s,border-color .15s}
.toggle button:hover{color:var(--ink-2)}
.toggle button.on{color:var(--ink);border-bottom-color:var(--signal)}
@media (prefers-reduced-motion:reduce){.toggle button{transition:none}}

/* cards / grids */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);margin-top:30px}
.card{background:var(--panel);padding:22px 24px 24px}
.card p{margin:0;color:var(--ink-2);font-size:15px}
.tick{font-family:ui-monospace,monospace;font-size:11.5px;color:var(--signal);letter-spacing:.1em}
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
@media(max-width:900px){.split{grid-template-columns:1fr;gap:30px}}

.steps{list-style:none;padding:0;margin:30px 0 0;counter-reset:s;display:grid;gap:1px;
  background:var(--line);border:1px solid var(--line)}
.steps li{background:var(--panel);padding:22px 26px;display:grid;grid-template-columns:auto 1fr;
  gap:20px;align-items:start;counter-increment:s}
.steps li::before{content:counter(s,decimal-leading-zero);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;color:var(--signal);
  font-weight:700;letter-spacing:.06em;padding-top:3px}
.steps p{margin:0;color:var(--ink-2);font-size:15.5px}

/* tables */
.table-scroll{overflow-x:auto;margin-top:24px}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:11.5px;
  letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3);font-weight:500;white-space:nowrap}
td span.note{display:block;color:var(--ink-3);font-size:13.5px;margin-top:3px}
.specs th{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:11.5px;
  letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3);font-weight:500;width:210px;
  white-space:nowrap}

/* faq */
.faq{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);margin-top:22px}
.faq details{background:var(--panel)}
.faq summary{cursor:pointer;padding:16px 20px;font-weight:600;font-size:15.5px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--signal);font-weight:700;font-size:19px;line-height:1;flex:none}
.faq details[open] summary::after{content:"–"}
.faq summary:hover{background:var(--panel-2)}
.faq div.a{padding:0 20px 18px;color:var(--ink-2);font-size:15px;max-width:72ch}
.faq div.a p{margin:0 0 12px}

/* misc */
.pull{border-left:2px solid var(--signal);padding:6px 0 6px 22px;margin:30px 0 0;font-size:20px;
  line-height:1.45;letter-spacing:-.018em;max-width:46ch;color:var(--ink)}
.callout{border:1px solid var(--line);border-left:2px solid var(--signal);background:var(--panel);
  padding:16px 20px;margin:24px 0 0;font-size:15px;color:var(--ink-2)}
.callout strong{color:var(--ink)}
pre{background:var(--panel);border:1px solid var(--line);padding:16px 18px;overflow-x:auto;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13.5px;line-height:1.55;
  margin:16px 0 0;color:var(--ink)}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;
  background:var(--panel-2);padding:1px 5px;border:1px solid var(--line)}
pre code{background:none;border:0;padding:0}
.toc{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
.toc a{text-decoration:none;font-size:13.5px;color:var(--ink-2);border:1px solid var(--line);
  padding:7px 13px;background:var(--panel)}
.toc a:hover{color:var(--ink);border-color:var(--ink-3)}

footer{border-top:1px solid var(--line);padding:46px 0 56px;color:var(--ink-2);font-size:15px}
.foot-grid{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;align-items:flex-start}
.foot-nav{display:flex;gap:20px;flex-wrap:wrap;font-size:14px}
.foot-nav a{text-decoration:none;color:var(--ink-2)}
.foot-nav a:hover{color:var(--ink)}
.fineprint{color:var(--ink-3);font-size:13px;margin-top:24px;max-width:64ch}