:root{--head:#062F62;--btn-bg:#F5F8FC;--note-bg:#E3F5FE;--code-bg:#FFFFFF;--navy:#062F62;--navy2:#0B3A6E;--blue:#17709E;--sky:#37C5FD;--ground:#F1F5FA;--ink:#0F2340;--muted:#8B9DB5;--line:#D5DEE9;--panel:#fff;
--sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--cond:"IBM Plex Sans Condensed","Arial Narrow",Arial,sans-serif;--mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);font:15.5px/1.6 var(--sans)}
a{color:var(--blue)}
h1,h2,h3{font-family:var(--cond);margin:0;text-wrap:balance;color:var(--navy2)}
.top{background:var(--navy);color:#fff;position:sticky;top:0;z-index:10}
.top .in{max-width:1100px;margin:0 auto;padding:10px 22px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none}
.brand img{width:38px;height:38px;border-radius:50%;background:#fff}
.brand .name{font-family:var(--cond);font-weight:700;font-size:22px;line-height:1}.brand .name b{color:var(--sky)}
.nav{margin-left:auto;display:flex;gap:4px;align-items:center;flex-wrap:wrap}
.nav a{color:#C9DCF2;text-decoration:none;padding:7px 12px;border-radius:6px;font-family:var(--cond);font-weight:600;font-size:14.5px}
.nav a:hover{background:rgba(255,255,255,.1);color:#fff}

.btn{display:inline-block;background:var(--btn-bg);border:1px solid var(--line);border-radius:8px;padding:10px 18px;font-family:var(--cond);font-weight:700;font-size:15px;color:var(--ink);text-decoration:none;cursor:pointer;letter-spacing:.02em}
.btn.primary{background:var(--sky);color:var(--navy);border-color:var(--sky)}
.btn.big{font-size:18px;padding:14px 30px;border-radius:10px;box-shadow:0 6px 18px rgba(28,138,214,.35)}
.nav .btn{padding:8px 14px;font-size:14px}
.hero{background:linear-gradient(135deg,#062F62 0%,#0B3A6E 55%,#1C8AD6 100%);color:#fff}
.hero .in{max-width:1100px;margin:0 auto;padding:64px 22px 56px;display:grid;grid-template-columns:1.2fr 1fr;gap:36px;align-items:center}
.hero h1{color:#fff;font-size:44px;line-height:1.08;margin-bottom:14px}
.hero p{font-size:18px;color:#DCEBFA;max-width:56ch;margin:0 0 22px}
.hero .acts{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.hero .acts .btn:not(.primary){background:transparent;border-color:rgba(255,255,255,.4);color:#fff;box-shadow:none}
.hero .fine{font-size:13px;color:#BFD9F5;margin-top:12px}
.mock{background:#fff;color:#000;border-radius:10px;padding:12px;box-shadow:0 20px 60px rgba(0,0,0,.35);font-family:var(--cond);transform:rotate(-1.5deg)}
.mock .t{display:flex;justify-content:space-between;font-weight:700;font-size:13px;border-bottom:2px solid var(--navy);padding-bottom:4px;margin-bottom:6px}
.mock table{width:100%;border-collapse:collapse;font-size:10.5px}
.mock th{background:var(--navy);color:#fff;font-weight:600;padding:3px 4px;font-size:9px;text-transform:uppercase}
.mock td{border:1px solid #000;padding:3px 4px;text-align:center;font-family:var(--mono);font-size:10px}
.mock td:first-child{text-align:left;font-family:var(--cond);font-weight:700}
.mock .foot{font-size:9px;color:#333;margin-top:6px;font-family:var(--mono)}
section.block{max-width:1100px;margin:0 auto;padding:56px 22px}
section.block h2{font-size:30px;margin-bottom:8px}
section.block .lead{color:var(--muted);font-size:17px;max-width:70ch;margin:0 0 26px}
.feats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.feat{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.feat h3{font-size:18px;margin-bottom:6px}.feat p{margin:0;color:var(--muted);font-size:14.5px}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;counter-reset:s}
.step{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px 18px 56px;position:relative}
.step::before{counter-increment:s;content:counter(s);position:absolute;left:16px;top:16px;width:28px;height:28px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-family:var(--cond);font-weight:700}
.step h3{font-size:17px;margin-bottom:4px}.step p{margin:0;color:var(--muted);font-size:14px}
.band{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.plans{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:820px}
.plan{border:1px solid var(--line);border-radius:12px;padding:20px 22px;background:var(--ground)}
.plan.pro{border-color:var(--sky);box-shadow:0 0 0 3px rgba(55,197,253,.2)}
.plan h3{font-size:20px}.plan .price{font-family:var(--mono);font-size:15px;color:var(--muted);margin:2px 0 10px}
.plan ul{margin:0;padding-left:18px;color:var(--ink);font-size:14.5px}.plan li{margin:3px 0}
.cta{text-align:center;padding:56px 22px}
.cta h2{font-size:30px;margin-bottom:8px}.cta p{color:var(--muted);margin:0 0 20px}
footer{max-width:1100px;margin:0 auto;padding:22px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
footer a{color:var(--blue);text-decoration:none}
main.doc{max-width:760px;margin:0 auto;padding:36px 22px 64px}
main.doc h1{font-size:34px;margin-bottom:6px}main.doc h2{font-size:21px;margin:30px 0 6px}
main.doc p{margin:10px 0}
main.doc .note{background:var(--note-bg);border-left:4px solid var(--sky);padding:10px 14px;border-radius:6px;font-size:14.5px}
main.doc .eq{font-family:var(--mono);background:var(--code-bg);border:1px solid var(--line);border-radius:8px;padding:10px 14px;font-size:14px;white-space:pre-wrap;line-height:1.5}
.kvs{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:15px}.kvs b{font-family:var(--cond);color:var(--muted);text-transform:uppercase;font-size:12.5px;letter-spacing:.06em;align-self:center}
@media (max-width:860px){.hero .in{grid-template-columns:1fr;padding:44px 20px}.hero h1{font-size:34px}.mock{transform:none}.feats,.steps,.plans{grid-template-columns:1fr}section.block{padding:40px 20px}.nav a:not(.btn){display:none}}

/* guides */
.crumb{font-size:13px;color:var(--muted);margin-bottom:14px}
.crumb a{color:var(--muted)}
.guides{display:grid;gap:14px;margin:22px 0 8px}
.guides .g{display:block;padding:20px 22px;border:1px solid var(--line);border-radius:12px;background:var(--panel);text-decoration:none;transition:border-color .15s,transform .15s}
.guides .g:hover{border-color:var(--accent2);transform:translateY(-1px)}
.guides .g h2{font-size:20px;margin:0 0 6px;color:var(--head)}
.guides .g p{margin:0;color:var(--muted);font-size:15px}
.doc .cta-in{margin:34px 0 10px;padding:26px;border-radius:14px;background:var(--navy);color:#fff;text-align:center}
.doc .cta-in h2{color:#fff;margin:0 0 8px}
.doc .cta-in p{color:#BFD9F5;margin:0 0 16px}
.doc .fine{font-size:12.5px;color:var(--muted);margin-top:18px}

/* ============================================================
   Site polish — dark mode, craft details, long-form pages
   ============================================================ */

/* ---------- dark mode ----------
   The app has had a full dark theme for a while; the marketing pages did not,
   so anyone with dark mode set got a white flash on the way in and a different
   looking site on the way back out. Same tokens as the app. */
@media (prefers-color-scheme:dark){
  :root{
    --ground:#0B1626; --panel:#12223A; --ink:#E8EEF6; --muted:#98A9C0;
    --line:#28405F; --navy:#081C33; --navy2:#0F2C4E; --blue:#63B8E8;
    --btn-bg:#1B2E48; --note-bg:#12324F; --code-bg:#0E1B2E; --head:#DCEAF8;
  }
  .feat,.step,.card,.note,.q,.panel{background:var(--panel);border-color:var(--line)}
  .mock{background:#F7FAFD;color:#0B1626}
  .top{background:#081C33;border-bottom:1px solid var(--line)}
  .hero{background:linear-gradient(135deg,#071D36 0%,#0C2C50 55%,#124C7C 100%)}
  section.block h2,h1,h2,h3{color:#DCEAF8}
  img[src$="logo-mark-256.png"]{background:#fff}
}

/* ---------- keyboard focus ----------
   Nothing on the public pages showed a focus ring, so tabbing was invisible.
   :focus-visible keeps mouse clicks clean. */
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:2px solid var(--sky); outline-offset:3px; border-radius:6px}
.top a:focus-visible{outline-color:#fff}

::selection{background:rgba(55,197,253,.30)}

/* ---------- motion ----------
   Small, purposeful: cards lift a little, buttons respond. Nothing moves on
   load, and everything stops for prefers-reduced-motion. */
.btn{transition:transform .13s ease, box-shadow .13s ease, background-color .13s ease, border-color .13s ease}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.primary:hover{box-shadow:0 8px 22px rgba(55,197,253,.38)}
.feat,.step{transition:transform .16s ease, box-shadow .16s ease, border-color .16s ease}
.feat:hover,.step:hover{transform:translateY(-2px);border-color:#A9C6E4;
  box-shadow:0 1px 2px rgba(11,35,64,.05), 0 10px 26px -8px rgba(11,35,64,.16)}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
  .btn:hover,.feat:hover,.step:hover{transform:none}
}
html{scroll-behavior:smooth}

/* ---------- depth ----------
   One flat 1px border on everything reads as a wireframe. A close contact
   shadow plus a wider ambient one is what makes a card sit on the page. */
.feat,.step,.card,.panel{box-shadow:0 1px 2px rgba(11,35,64,.04), 0 6px 16px -10px rgba(11,35,64,.14)}
@media (prefers-color-scheme:dark){
  .feat,.step,.card,.panel{box-shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 20px -12px rgba(0,0,0,.5)}
  .feat:hover,.step:hover{border-color:#3A5A82;box-shadow:0 1px 2px rgba(0,0,0,.35), 0 12px 28px -10px rgba(0,0,0,.6)}
}

/* ---------- typography ----------
   Headings sized down slightly at the top of the scale and tightened, which is
   what separates a 2019 marketing page from a current one. */
h1,h2,h3{letter-spacing:-.018em}
.hero h1{font-size:clamp(34px,4.6vw,52px);letter-spacing:-.026em;line-height:1.06}
.hero p{font-size:clamp(16px,1.35vw,18.5px)}
section.block h2{font-size:clamp(25px,2.7vw,32px)}
section.block .lead{max-width:64ch}
p{text-wrap:pretty}
:target{scroll-margin-top:84px}

/* ---------- long-form pages (terms, privacy, guides) ---------- */
main.legal{max-width:740px;margin:0 auto;padding:40px 22px 72px}
main.legal h1{font-size:clamp(28px,3.4vw,38px);margin-bottom:6px}
main.legal h2{font-size:20px;margin:34px 0 8px}
main.legal p,main.legal li{max-width:68ch;color:var(--ink)}
main.legal li{margin-bottom:6px}
main.legal .note{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:18px 0;
  box-shadow:0 1px 2px rgba(11,35,64,.04), 0 6px 16px -10px rgba(11,35,64,.14)}
main.legal > p:first-of-type{color:var(--muted);font-size:14px}

footer{max-width:1100px;margin:0 auto;padding:26px 22px 40px;color:var(--muted);font-size:13.5px;
  border-top:1px solid var(--line);display:grid;gap:8px}
footer a{color:var(--blue);text-decoration:none}
footer a:hover{text-decoration:underline}

/* ---------- skip link ----------
   First thing in the tab order, invisible until focused. */
.skip-link{position:absolute;left:12px;top:-48px;z-index:100;background:var(--sky);color:var(--navy);
  padding:10px 16px;border-radius:8px;font-family:var(--cond);font-weight:700;text-decoration:none;
  transition:top .15s ease}
.skip-link:focus{top:12px}

/* ---------- download block on the printable navlog guide ---------- */
.dl{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;margin:22px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;
  box-shadow:0 1px 2px rgba(11,35,64,.04), 0 6px 16px -10px rgba(11,35,64,.14)}
.dl .fine{flex-basis:100%;color:var(--muted);font-size:13.5px;margin-top:2px}
.crumb{color:var(--muted);font-size:13.5px;margin-bottom:14px}
.crumb a{color:var(--blue);text-decoration:none}
.cta{margin-top:30px}

/* ---------- inline diagrams on the guide pages ----------
   The SVGs carry no colours of their own: they pull these tokens so they
   follow the page theme instead of burning a light palette into the markup. */
:root{--dia-blue:#17709E;--dia-warm:#B5450C;--dia-green:#15803D;
  --dia-p1:#EEF3F9;--dia-p2:#E7F3FB}
@media (prefers-color-scheme:dark){
  :root{--dia-blue:#63B8E8;--dia-warm:#F0955C;--dia-green:#6FCB8E;
    --dia-p1:#16283F;--dia-p2:#132F49}
}
figure{margin:24px 0;padding:18px 18px 14px;background:var(--panel);
  border:1px solid var(--line);border-radius:14px;
  box-shadow:0 1px 2px rgba(11,35,64,.04), 0 6px 16px -10px rgba(11,35,64,.14)}
figure img{display:block;width:100%;height:auto;border-radius:8px}
figcaption{color:var(--muted);font-size:13.5px;line-height:1.5;margin-top:12px}
.dia{display:block;width:100%;height:auto;overflow:visible}
.dia .lb{font:600 13.5px var(--sans);fill:var(--ink)}
.dia .lb.sm{font-weight:400;font-size:12.5px;fill:var(--muted)}
.dia .big2{font-size:17px;letter-spacing:.04em}
.dia .mono{font-family:var(--mono)}
.dia .mono.big{font-size:30px;font-weight:600}
/* Under about 700px the diagrams would scale down to six point text, so they
   keep their intrinsic size and the figure scrolls sideways instead. */
@media (max-width:700px){
  figure:has(.dia){overflow-x:auto;-webkit-overflow-scrolling:touch}
  .dia{width:auto;max-width:none;min-width:0}
}

/* ---------- FAQ ----------
   Plain details/summary so it works with no JS and stays readable when a
   crawler flattens it. Answers stay in the DOM whether open or closed. */
.faqs{display:grid;gap:10px;max-width:80ch}
.q{background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:0 18px;transition:border-color .15s}
.q[open]{border-color:var(--accent2, #17709E)}
.q summary{list-style:none;cursor:pointer;padding:16px 0;font-family:var(--cond);
  font-weight:700;font-size:17.5px;color:var(--head);display:flex;
  align-items:flex-start;justify-content:space-between;gap:14px}
.q summary::-webkit-details-marker{display:none}
.q summary::after{content:"+";font-family:var(--sans);font-weight:400;font-size:22px;
  line-height:1;color:var(--blue);flex:none;transition:transform .18s ease}
.q[open] summary::after{content:"\2212"}
.q summary:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:6px}
.q p{margin:0 0 18px;color:var(--muted);line-height:1.6;max-width:72ch}

/* maneuvers band */
.manband{background:linear-gradient(135deg,#0B2545,#123A6B 70%,#155FA8);color:#fff}
.manband h2{color:#fff}.manband p.lead,.manband .lead{color:rgba(255,255,255,.92)}.manband .fine{color:rgba(255,255,255,.7)}
.manband .btn{border-color:rgba(255,255,255,.35);color:#fff;background:transparent}.manband .btn.primary{background:var(--sky);border-color:var(--sky);color:#04121F}
.eyebrow{font-family:var(--cond);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--sky);margin-bottom:8px}
.mangrid{display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:center}
.manmock{display:block;background:#09151F;color:#E6EEF6;border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:14px;text-decoration:none;box-shadow:0 24px 60px rgba(0,0,0,.4);transform:rotate(1.2deg);transition:transform .16s ease}
.manmock:hover{transform:rotate(0) translateY(-2px)}
.manmock .mt{display:flex;justify-content:space-between;font-family:var(--cond);font-size:12px;letter-spacing:.12em;color:#8FB3D9;margin-bottom:10px}
.manmock img{display:block;width:100%;height:auto;border-radius:10px;border:1px solid rgba(255,255,255,.1)}
.manmock .ro{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px}
.manmock .ro div{background:#0F2236;border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:8px 6px;text-align:center}
.manmock .ro b{display:block;font-family:var(--mono);font-size:18px;font-weight:500}.manmock .ro span{font-family:var(--cond);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:#8FB3D9}
.manmock .cue{margin-top:12px;font-size:13px;line-height:1.45;color:#C9D8EA;border-left:3px solid var(--sky);padding-left:10px}
@media (max-width:760px){ .mangrid{grid-template-columns:1fr;gap:22px} .manmock{transform:none} }