/* Pylor for Education. Pylor's ink, paper and logo. Its own layout. */
:root{
  --ink:#0e1d31;
  --muted:#5b6472;
  --faint:#8a93a0;
  --line:#e5dfd3;
  --paper:#fbf8f3;
  --sand:#f1ece2;
  --blue:#1f6faa;
  --blue-d:#195c8e;
  --teal:#5dd0bd;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{margin:0;color:var(--ink);background:var(--paper);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;font-size:17px;line-height:1.6;font-optical-sizing:auto;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
a:focus-visible,button:focus-visible{outline:3px solid var(--blue);outline-offset:4px}
h1,h2,h3,p{margin:0}
h1,h2{font-weight:600;letter-spacing:-.055em;line-height:1.02}
h1{font-size:clamp(46px,7.4vw,112px)}
h2{font-size:clamp(34px,4.4vw,64px)}
h3{font-size:17px;font-weight:600;letter-spacing:-.01em;line-height:1.35}
.wrap{max-width:1240px;margin:auto;padding:0 36px}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:7px;z-index:30}
.skip:focus{left:12px}
.muted{color:var(--muted)}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:13px 24px;border:1px solid var(--blue);border-radius:7px;background:var(--blue);color:#fff;font-size:15px;font-weight:600;transition:background .2s}
.btn:hover{background:var(--blue-d);border-color:var(--blue-d)}
.textlink{font-size:15px;font-weight:600;border-bottom:1px solid currentColor;padding-bottom:2px}
.textlink:hover{color:var(--blue)}

/* header */
header{position:sticky;top:0;background:#fbf8f3f2;backdrop-filter:blur(15px);z-index:20;border-bottom:1px solid var(--line)}
.nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:25px}
.brand{font-size:26px;font-weight:700;letter-spacing:-1px;display:flex;align-items:center;gap:10px}
.brand img{display:block;width:38px;height:38px;border-radius:7px}
.brand small{font-size:15px;font-weight:500;letter-spacing:-.01em;color:var(--muted);margin-left:2px}
.links{display:flex;gap:30px;font-size:14px}
.links a:hover,.links a[aria-current]{text-decoration:underline;text-underline-offset:5px}
.nav-right{display:flex;align-items:center;gap:24px;font-size:14px}
.nav .btn{min-height:40px;padding:8px 16px;font-size:14px}
.menu{display:none;background:none;border:1px solid var(--line);border-radius:5px;padding:6px 10px}

/* hero: the headline is the picture. One sentence ignored, one answered. */
.hero{padding:90px 0 0}
.hero h1 .unread{color:var(--faint);display:block}
.hero h1 .read{display:block}
.hero-grid{display:grid;grid-template-columns:5fr 7fr;gap:70px;margin-top:64px;align-items:start}
.intro{font-size:19px;line-height:1.65;color:var(--muted);max-width:470px}
.actions{display:flex;gap:26px;align-items:center;flex-wrap:wrap;margin-top:34px}
.micro{font-size:13px;color:var(--muted);margin-top:22px}

.versus{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--ink)}
.versus>div{padding:18px 0 0}
.versus>div+div{padding-left:28px;border-left:1px solid var(--line)}
.versus>div:first-child{padding-right:28px}
.versus .cap{display:flex;justify-content:space-between;font-size:13px;font-weight:600;margin-bottom:18px}
.versus .cap span{font-weight:400;color:var(--muted)}
.mail{list-style:none;margin:0;padding:0;color:var(--faint)}
.mail li{padding:11px 0;border-bottom:1px solid var(--line);font-size:13px;line-height:1.4;display:grid;grid-template-columns:8px 1fr auto;gap:10px;align-items:baseline}
.mail li:last-child{border:0}
.mail i{width:7px;height:7px;border-radius:50%;background:var(--faint);align-self:center}
.mail b{display:block;font-weight:600;color:#6d7785}
.mail time{font-size:11px;white-space:nowrap}
.sms{display:flex;flex-direction:column;gap:8px}
.b{font-size:15px;line-height:1.42;padding:10px 14px;border-radius:19px 19px 19px 5px;background:#e9e4d9;max-width:92%;align-self:flex-start}
.b.me{background:var(--blue);color:#fff;border-radius:19px 19px 5px 19px;align-self:flex-end}
.stamp{font-size:11px;color:var(--muted);margin:2px 4px 0}
.stamp.r{align-self:flex-end}
.eg{font-size:12px;color:var(--muted);margin-top:16px}

/* section frame: label in a left rail, content to the right */
.block{display:grid;grid-template-columns:190px 1fr;gap:40px;padding:120px 0;border-top:1px solid var(--line)}
.hero+.block{margin-top:110px}
.rail{font-size:14px;font-weight:600;position:sticky;top:110px;align-self:start}
.rail span{display:block;font-weight:400;color:var(--muted);margin-top:2px}
.lead{font-size:20px;line-height:1.6;color:var(--muted);max-width:620px;margin-top:28px}
section[id]{scroll-margin-top:90px}

/* the slide: four lines, each one harder to ignore */
.band{background:var(--ink);color:#fff}
.band .block{border:0}
.band .rail span{color:#9fb0c4}
.slide{list-style:none;margin:0;padding:0;font-size:clamp(30px,4.6vw,66px);font-weight:600;letter-spacing:-.055em;line-height:1.12}
.slide li:nth-child(1){opacity:.3}
.slide li:nth-child(2){opacity:.45}
.slide li:nth-child(3){opacity:.65}
.aside{display:grid;grid-template-columns:1fr 1fr;gap:60px;margin-top:70px;padding-top:34px;border-top:1px solid #2c3f57;font-size:17px;color:#c5d0de}
.aside blockquote{margin:0;color:#fff;font-size:21px;line-height:1.5;letter-spacing:-.01em}
.aside cite{display:block;font-style:normal;font-size:14px;color:#9fb0c4;margin-top:12px}

/* one thread, annotated in the margin */
.thread{margin-top:70px;border-top:1px solid var(--ink)}
.t-row{display:grid;grid-template-columns:120px minmax(0,460px) 1fr;gap:0 44px;padding:26px 0;border-bottom:1px solid var(--line);align-items:start}
.t-row>time{font-size:13px;font-weight:600;padding-top:10px}
.t-row>time span{display:block;font-weight:400;color:var(--muted)}
.t-row .sms{gap:7px}
.note{padding-top:8px;max-width:330px;justify-self:end;width:100%}
.note p{font-size:15px;color:var(--muted);margin-top:4px;line-height:1.55}

/* drift alarm */
.rule{font-size:clamp(24px,2.7vw,36px);font-weight:600;letter-spacing:-.04em;line-height:1.2;max-width:820px;display:flex;gap:26px;align-items:flex-start;margin-top:56px;padding:34px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.toggle{width:58px;height:34px;border-radius:999px;background:var(--blue);position:relative;flex:none;margin-top:5px}
.toggle:after{content:"";position:absolute;right:4px;top:4px;width:26px;height:26px;border-radius:50%;background:#fff}
.rule-cap{font-size:13px;color:var(--muted);margin-top:12px}
.duo{display:grid;grid-template-columns:minmax(0,460px) 1fr;gap:70px;margin-top:56px;align-items:start}
.plain{list-style:none;margin:0;padding:0}
.plain li{padding:16px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:16px}
.plain li:first-child{padding-top:0}
.plain li:last-child{border:0}
.plain b{color:var(--ink);font-weight:600}

/* the staff list, as a list */
.ledger{width:100%;border-collapse:collapse;margin-top:60px;font-size:15px}
.ledger caption{text-align:left;font-size:13px;color:var(--muted);padding-bottom:14px}
.ledger caption b{color:var(--ink);font-size:17px;font-weight:600;margin-right:14px}
.ledger th{text-align:left;font-size:13px;font-weight:400;color:var(--muted);padding:10px 20px 10px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}
.ledger td{padding:20px 20px 20px 0;border-bottom:1px solid var(--line);vertical-align:top;color:var(--muted)}
.ledger td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
.ledger td.why{color:var(--ink)}
.ledger td.next{color:var(--ink);font-weight:600;padding-right:0}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:0 60px;margin-top:56px}
.cols .plain li:first-child{padding-top:16px}

/* safety */
.steps{display:grid;grid-template-columns:repeat(3,1fr);margin-top:64px;border-top:1px solid var(--ink)}
.steps div{padding:24px 30px 0 0}
.steps div+div{padding-left:30px;border-left:1px solid var(--line)}
.steps strong{display:block;font-size:clamp(40px,4.6vw,68px);font-weight:600;letter-spacing:-.06em;line-height:1}
.steps h3{margin-top:18px}
.steps p{font-size:15px;color:var(--muted);margin-top:6px}
.wont{display:grid;grid-template-columns:1fr 1fr;gap:60px;margin-top:80px}
.wont h3{font-size:24px;letter-spacing:-.03em}
.wont>div>p{color:var(--muted);font-size:16px;margin-top:12px;max-width:400px}
.routes{list-style:none;margin:0;padding:0;border-top:1px solid var(--ink)}
.routes li{display:flex;justify-content:space-between;gap:20px;padding:13px 0;border-bottom:1px solid var(--line);font-size:16px}
.routes li span{color:var(--muted);font-size:14px;white-space:nowrap}

/* connections */
.conn{width:100%;border-collapse:collapse;margin-top:60px;font-size:15px}
.conn th[scope=col]{text-align:left;font-size:20px;font-weight:600;letter-spacing:-.03em;padding:0 30px 16px 0;border-bottom:1px solid var(--ink);width:50%}
.conn th[scope=col] span{display:block;font-size:13px;font-weight:400;letter-spacing:0;color:var(--muted);margin-top:3px}
.conn td{padding:18px 30px 18px 0;border-bottom:1px solid var(--line);vertical-align:top;color:var(--muted)}
.conn td b{display:block;color:var(--ink);font-weight:600}
.conn tr:last-child td{border-bottom:0}

/* pilot */
.pilot{background:var(--sand)}
.pilot .block{border:0}
.terms{display:grid;grid-template-columns:repeat(4,1fr);margin-top:64px;border-top:1px solid var(--ink)}
.terms div{padding:22px 24px 0 0}
.terms div+div{padding-left:24px;border-left:1px solid #d8cfc1}
.terms strong{display:block;font-size:clamp(30px,3.4vw,50px);font-weight:600;letter-spacing:-.055em;line-height:1.05}
.terms span{display:block;font-size:15px;color:var(--muted);margin-top:10px}
.pilot .actions{margin-top:60px}

/* founder note */
.letter{max-width:640px}
.letter p{font-size:21px;line-height:1.6;letter-spacing:-.01em}
.letter p+p{margin-top:24px}
.letter .sig{font-size:15px;color:var(--muted);margin-top:36px;letter-spacing:0}
.letter .sig b{display:block;color:var(--ink);font-size:17px}
.letter .sig a{border-bottom:1px solid currentColor}

/* footer */
.footer{padding:30px 0 40px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:25px;flex-wrap:wrap}
.footer small{font-size:13px;color:var(--muted)}
.footer-links{display:flex;gap:22px;font-size:13px;flex-wrap:wrap}
.footer-links a:hover{text-decoration:underline;text-underline-offset:4px}

/* security page */
.doc{padding:90px 0 110px}
.doc .wrap{max-width:900px}
.doc .kicker{font-size:14px;font-weight:600;margin-bottom:18px}
.doc h1{font-size:clamp(40px,5.4vw,76px)}
.doc .lede{font-size:20px;line-height:1.6;color:var(--muted);margin-top:28px;max-width:640px}
.doc h2{font-size:clamp(26px,2.6vw,34px);letter-spacing:-.04em;line-height:1.15;margin-top:70px;padding-top:26px;border-top:1px solid var(--ink)}
.doc p,.doc li{color:var(--muted);font-size:16px;line-height:1.7}
.doc p{margin-top:14px}
.doc b{color:var(--ink);font-weight:600}
.doc ul.list{padding-left:20px;margin:18px 0 0}
.doc ul.list li{margin-top:9px}
.doc a{border-bottom:1px solid currentColor}
.toc{display:flex;flex-wrap:wrap;gap:8px 24px;margin:34px 0 0;padding:0;list-style:none}
.toc a{font-size:15px;font-weight:600;color:var(--ink)}
.tbl{width:100%;border-collapse:collapse;margin-top:22px;font-size:15px}
.tbl th,.tbl td{text-align:left;vertical-align:top;padding:13px 20px 13px 0;border-bottom:1px solid var(--line)}
.tbl th{font-size:13px;font-weight:400;color:var(--muted)}
.tbl td{color:var(--muted)}
.tbl td:first-child{color:var(--ink);font-weight:600}
.status{font-size:13px;font-weight:600;white-space:nowrap}
.status.no{color:#8a3a17}
.status.part{color:#6f4b00}
.callout{margin-top:50px;padding:26px 0 0;border-top:1px solid var(--ink)}
.callout p{margin:0;font-size:17px}

@media (max-width:1000px){
  .wrap{padding:0 25px}
  .links{gap:16px}
  .nav-right>a:first-child{display:none}
  .hero-grid{grid-template-columns:1fr;gap:50px;margin-top:44px}
  .block{grid-template-columns:1fr;gap:26px;padding:84px 0}
  .rail{position:static}
  .rail span{display:inline;margin-left:8px}
  .t-row{grid-template-columns:90px minmax(0,1fr);gap:0 24px}
  .note{grid-column:2;justify-self:start;max-width:none;padding-top:14px}
  .duo{grid-template-columns:1fr;gap:44px}
}
@media (max-width:760px){
  body{font-size:16px}
  .nav{height:66px}
  .brand small{display:none}
  .nav-right{margin-left:auto;gap:10px}
  .menu{display:block}
  .links{display:none;position:absolute;left:0;right:0;top:66px;padding:22px;background:var(--paper);border-bottom:1px solid var(--line)}
  .links.open{display:flex;flex-wrap:wrap;justify-content:center}
  .hero{padding-top:50px}
  .hero+.block{margin-top:70px}
  .intro{font-size:17px}
  .versus{grid-template-columns:1fr}
  .versus>div+div{padding-left:0;border-left:0;border-top:1px solid var(--ink);margin-top:24px}
  .versus>div:first-child{padding-right:0}
  .block{padding:64px 0}
  .lead{font-size:18px}
  .aside{grid-template-columns:1fr;gap:26px;margin-top:44px}
  .t-row{grid-template-columns:1fr;padding:22px 0}
  .t-row>time{padding:0 0 12px}
  .t-row>time span{display:inline;margin-left:6px}
  .note{grid-column:1}
  .rule{gap:16px}
  .cols,.wont{grid-template-columns:1fr;gap:0}
  .wont{gap:30px;margin-top:56px}
  .steps,.terms{grid-template-columns:1fr}
  .steps div,.steps div+div{padding:22px 0;border-left:0;border-bottom:1px solid var(--line)}
  .terms{grid-template-columns:1fr 1fr}
  .terms div,.terms div+div{padding:20px 14px 20px 0;border-left:0;border-bottom:1px solid #d8cfc1}
  .ledger thead{display:none}
  .ledger,.ledger tbody,.ledger tr,.ledger td{display:block}
  .ledger tr{padding:18px 0;border-bottom:1px solid var(--line)}
  .ledger tbody tr:first-child{border-top:1px solid var(--ink)}
  .ledger td{padding:2px 0;border:0}
  .conn,.conn tbody,.conn thead,.conn tr,.conn td,.conn th{display:block;width:auto}
  .conn thead{display:none}
  .conn td{padding:14px 0}
  .conn td[data-h]:before{content:attr(data-h);display:block;font-size:12px;color:var(--faint);margin-bottom:2px}
  .letter p{font-size:18px}
  .doc{padding:50px 0 70px}
  .tbl{font-size:14px}
}
@media (max-width:380px){
  .wrap{padding:0 18px}
  .brand{font-size:23px}
  .brand img{width:32px;height:32px}
  .nav .btn{padding:8px 11px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}