/* Pilot Logbook website. The hero is always night-sky dark; the rest follows the visitor's light / dark setting. */
:root{--bg:#f5f7fb;--bg2:#eaeef6;--card:#ffffff;--ink:#0f1522;--mute:#556073;--line:#dde3ec;--accent:#2457e6;--accent2:#5b8cff;--orange:#e07a12;--ok:#16794a;
  --night:#070b14;--night2:#0d1424;--nink:#eef2f9;--nmute:#9aa7bd;--shadow:0 30px 80px -30px rgba(10,20,40,.35)}
@media (prefers-color-scheme:dark){:root{--bg:#0a0f1a;--bg2:#0f1626;--card:#121a2a;--ink:#e9eef7;--mute:#9aa7bd;--line:#223049;--accent:#5b8cff;--accent2:#8db0ff;--orange:#f2a24a;--ok:#4cc38a;--shadow:0 30px 80px -30px rgba(0,0,0,.7)}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-underline-offset:3px}
img{max-width:100%;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}.wrap.narrow{max-width:820px}
.grow{flex:1}
h1,h2,h3{letter-spacing:-.022em;line-height:1.08;margin:0}
h2{font-size:clamp(28px,4vw,44px);margin-bottom:14px}
h3{font-size:19px;letter-spacing:-.01em;line-height:1.25}
.kicker{margin:0 0 10px;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.sub{color:var(--mute);font-size:18px;max-width:680px;margin:0 0 36px}
.fine{font-size:14px;color:var(--mute)}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:12px;font-weight:650;font-size:15px;text-decoration:none;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:transform .15s,box-shadow .15s,background .15s}
.btn.lg{min-height:52px;padding:0 24px;font-size:16px;border-radius:14px}
.btn.primary{background:linear-gradient(180deg,var(--accent2),var(--accent));color:#fff;box-shadow:0 10px 26px -10px color-mix(in srgb,var(--accent) 80%,transparent)}
.btn.primary:hover{transform:translateY(-1px);box-shadow:0 14px 30px -10px color-mix(in srgb,var(--accent) 90%,transparent)}
.btn.ghost{background:transparent;color:inherit;border-color:color-mix(in srgb,currentColor 25%,transparent)}
.btn.ghost:hover{background:color-mix(in srgb,currentColor 8%,transparent)}
.btn:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--accent2);outline-offset:3px;border-radius:12px}
/* header: dark glass over the hero */
header.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--night) 78%,transparent);backdrop-filter:saturate(1.5) blur(14px);-webkit-backdrop-filter:saturate(1.5) blur(14px);border-bottom:1px solid rgba(255,255,255,.08);color:var(--nink)}
.bar{display:flex;align-items:center;gap:14px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;font-size:17px;color:inherit;text-decoration:none;white-space:nowrap}
.brand img{width:30px;height:30px;border-radius:8px}
.links{display:flex;gap:22px;margin-left:24px}.links a{color:var(--nmute);text-decoration:none;font-size:15px;font-weight:550}.links a:hover{color:var(--nink)}
/* hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(1100px 520px at 75% 10%,rgba(91,140,255,.28),transparent 60%),radial-gradient(800px 500px at 0% 100%,rgba(224,122,18,.12),transparent 60%),linear-gradient(180deg,var(--night),var(--night2));color:var(--nink);padding:72px 0 96px}
.routes{position:absolute;inset:0;width:100%;height:100%;opacity:.5}
.routes path{fill:none;stroke:rgba(141,176,255,.35);stroke-width:1.2;stroke-dasharray:3 7}
.routes circle{fill:#8db0ff}
.herogrid{position:relative;display:grid;grid-template-columns:1.02fr 1fr;gap:40px;align-items:center}
.pill{display:inline-block;font-size:13px;font-weight:650;color:#c9d8ff;background:rgba(91,140,255,.16);border:1px solid rgba(141,176,255,.3);padding:6px 13px;border-radius:999px}
h1{font-size:clamp(40px,5.6vw,68px);margin:20px 0 18px;background:linear-gradient(180deg,#fff 30%,#b9cbff);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(17px,1.7vw,20px);color:var(--nmute);max-width:560px;margin:0 0 30px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.facts{list-style:none;padding:0;margin:30px 0 0;display:flex;flex-wrap:wrap;gap:8px 22px;font-size:14px;color:var(--nmute)}
.facts li::before{content:"✓";color:#4cc38a;font-weight:800;margin-right:8px}
/* devices drawn in CSS */
.devices{position:relative;min-height:440px}
.ipad{position:relative;margin-left:auto;width:100%;max-width:600px;aspect-ratio:4/3;padding:14px;border-radius:30px;background:linear-gradient(145deg,#2b3242,#11151e);box-shadow:0 50px 100px -30px rgba(0,0,0,.8),inset 0 0 0 1px rgba(255,255,255,.08);transform:perspective(1600px) rotateY(-9deg) rotateX(3deg)}
.iphone{position:absolute;left:-2%;bottom:-38px;width:31%;max-width:190px;aspect-ratio:390/800;padding:7px;border-radius:30px;background:linear-gradient(145deg,#353d50,#12161f);box-shadow:0 40px 70px -20px rgba(0,0,0,.85),inset 0 0 0 1px rgba(255,255,255,.1);transform:perspective(1400px) rotateY(10deg) rotateZ(-2deg)}
.screen{width:100%;height:100%;overflow:hidden;border-radius:18px;background:#0d1117}
.iphone .screen{border-radius:24px}
.screen img{width:100%;height:100%;object-fit:cover;object-position:top left}
/* trust strip */
.strip{background:var(--card);border-bottom:1px solid var(--line)}
.striprow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding-top:20px;padding-bottom:20px;font-size:14px;color:var(--mute)}
.striprow b{color:var(--ink)}
/* sections */
.sect{padding:96px 0}.sect.alt{background:var(--bg2)}
.bento{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.tile.wide{grid-column:span 2}
.tile{position:relative;display:flex;flex-direction:column;gap:10px;background:var(--card);border:1px solid var(--line);border-radius:22px;padding:24px 24px 0;overflow:hidden;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.tile p{margin:0;color:var(--mute);font-size:15px}
.tile.big{grid-column:span 2;flex-direction:row;gap:30px;padding:30px}
.tile.big .tiletext{flex:0 0 38%}
.tile ul{margin:14px 0 0;padding:0;list-style:none;color:var(--mute);font-size:15px}.tile li{padding:5px 0 5px 22px;position:relative}.tile li::before{content:"";position:absolute;left:0;top:13px;width:8px;height:8px;border-radius:50%;background:var(--orange)}
.ico{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;font-size:20px;background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent)}
.tile.big .ico{margin-bottom:12px}.tile.big h3{font-size:26px;margin-bottom:10px}
/* close-ups: sharp captures of one element of the real app each, shown whole */
.shot,.shots{margin:8px -6px 18px;padding:12px;border-radius:16px;background:var(--bg2);border:1px solid var(--line)}
.shot img,.shots img{width:100%;height:auto;border-radius:10px}
.shots{display:flex;flex-direction:column;gap:10px}
.tile.big .shots{flex:1;margin:0;align-self:center;padding:16px;box-shadow:var(--shadow)}
.shot.fade{-webkit-mask-image:linear-gradient(90deg,#000 80%,transparent);mask-image:linear-gradient(90deg,#000 80%,transparent)}
.tile{padding-bottom:6px}
/* steps */
.steps{list-style:none;padding:0;margin:12px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
.steps li{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:26px}
.steps p{margin:8px 0 0;color:var(--mute);font-size:15px}
.n{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:linear-gradient(180deg,var(--accent2),var(--accent));color:#fff;font-weight:800;margin-bottom:16px}
/* privacy */
.privacy{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center}
.checks{list-style:none;padding:26px 28px;margin:0;background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
.checks li{padding:10px 0 10px 34px;position:relative;border-bottom:1px solid var(--line)}.checks li:last-child{border-bottom:0}
.checks li::before{content:"✓";position:absolute;left:0;top:8px;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:800;color:#fff;background:var(--ok)}
/* FAQ */
details{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:0 22px;margin:0 0 10px}
summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:650;font-size:17px;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:22px;line-height:1;color:var(--accent);transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:0 0 18px;color:var(--mute)}
/* invite */
.invitebox{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start;padding:44px;border-radius:28px;background:radial-gradient(700px 300px at 0% 0%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 70%),var(--card);border:1px solid var(--line);box-shadow:var(--shadow)}
form label{display:block;font-size:14px;font-weight:650;margin:0 0 6px}.opt{font-weight:400;color:var(--mute)}
form input,form textarea{width:100%;font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:13px 14px;margin:0 0 16px}
form input:focus,form textarea:focus{outline:3px solid color-mix(in srgb,var(--accent) 30%,transparent);border-color:var(--accent)}
form textarea{min-height:96px;resize:vertical}
form .btn{width:100%}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
#formmsg{min-height:24px;font-size:15px;margin-top:10px}#formmsg.ok{color:var(--ok)}#formmsg.err{color:#d23b2c}
/* footer */
footer{border-top:1px solid var(--line);padding:40px 0 50px}
.foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.foot .brand{color:var(--ink)}
.foot nav{display:flex;gap:20px;flex-wrap:wrap;align-items:center}.foot nav a{color:var(--mute);text-decoration:none;font-size:15px}.foot nav a:hover{color:var(--ink)}
/* smaller screens */
@media (max-width:980px){.tile.big .shots{box-shadow:none;margin:0 0 18px}.tile.wide{grid-column:auto}.herogrid{grid-template-columns:1fr;gap:56px}.devices{min-height:0;max-width:620px;margin:0 auto;width:100%}.ipad{transform:none;margin:0 auto}.iphone{left:-4px;bottom:-30px}
  .bento{grid-template-columns:1fr 1fr}.tile.big{grid-column:span 2;flex-direction:column;padding:24px 24px 0}.tile.big .tiletext{flex:none}.tile.big .crop{margin:0 -24px;border-radius:0;border-width:1px 0 0;box-shadow:none;min-height:300px}
  .striprow{grid-template-columns:1fr 1fr}.privacy,.invitebox{grid-template-columns:1fr}.links{display:none}}
@media (max-width:640px){.sect{padding:64px 0}.hero{padding:44px 0 72px}.bento,.steps{grid-template-columns:1fr}.tile.wide{grid-column:auto}.tile.big{grid-column:auto}.striprow{grid-template-columns:1fr;gap:8px}
  .invitebox{padding:24px;gap:24px}.hdr-signin{display:none}.brand span{font-size:16px}header .btn.primary{padding:0 14px;font-size:14px}.cta .btn{width:100%}.iphone{width:34%}}

.applist{list-style:none;padding:0;margin:18px 0 6px;display:flex;flex-wrap:wrap;gap:8px}.applist li{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:7px 14px;font-weight:600;font-size:14px}

/* "See it in flight": a cover-flow of phone screens (centre one large, its neighbours turned and faded), on the night sky */
.sect.night{background:radial-gradient(1200px 500px at 50% 0%,#1b2b5a 0%,transparent 70%),linear-gradient(180deg,var(--night) 0%,var(--night2) 100%);color:var(--nink)}
.sect.night .kicker{color:var(--orange)}.sect.night h2{color:#fff}.sect.night .fine{color:var(--nmute)}
.center{text-align:center}
.cflow{position:relative;height:clamp(440px,62vw,640px);perspective:1400px;margin:26px auto 0;max-width:1180px;outline:none;touch-action:pan-y}
.cfs{position:absolute;left:50%;top:0;margin:0;width:clamp(220px,28vw,300px);transform-style:preserve-3d;transition:transform .6s cubic-bezier(.2,.7,.2,1),opacity .6s,filter .6s;cursor:pointer}
.cfphone{border-radius:38px;padding:10px;background:linear-gradient(160deg,#2a3550,#0b1120);box-shadow:0 40px 80px -30px rgba(0,0,0,.8),0 0 0 1px rgba(255,255,255,.08) inset}
.cfphone img{width:100%;height:auto;border-radius:29px;display:block;background:#0b1120}
.cfcap{margin-top:18px;min-height:110px}.cfcap h3{color:#8db0ff;font-size:20px}.cfcap p{margin:6px auto 0;max-width:520px}
.cfdots{display:flex;justify-content:center;gap:10px;margin-top:14px}
.cfdots button{width:12px;height:12px;border-radius:50%;border:2px solid #8db0ff;background:transparent;padding:0;cursor:pointer}
.cfdots button[aria-selected="true"]{background:#8db0ff}
@media (prefers-reduced-motion:reduce){.cfs{transition:none}}
/* Privacy by design */
.pvband{padding-top:10px}
.pvband .shield{color:#4ade80;margin:0 auto 10px;display:block}
.lead2{font-size:18px;color:var(--nmute);max-width:720px;margin:0 auto 22px}
.pchips{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:10px;padding:0;margin:0}
.pchips li{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:12px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);font-size:15px;color:#dfe7f5}
.pchips li::before{content:'';width:14px;height:8px;border-left:2px solid #4ade80;border-bottom:2px solid #4ade80;transform:rotate(-45deg) translateY(-2px)}
.sect.night{overflow:hidden} /* the turned side phones never widen the page */