/* avlights.app — the one stylesheet.
   Deliberately BlipSat's look (BlipSat repo static/css/site.css): same tokens, same two faces,
   radius 0 and no shadows anywhere, so the two PresumeNothing pilot products read as one family.
   The four flight-category colours are data colours only; the brand accent is BlipSat's sage. */

/* ---------------------------------------------------------------- 1. fonts */
/* Archivo Black and IBM Plex Mono, both SIL Open Font License 1.1. */
@font-face{font-family:"Archivo Black";src:url("/fonts/ArchivoBlack-Regular.ttf") format("truetype");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("/fonts/IBMPlexMono-Regular.ttf") format("truetype");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("/fonts/IBMPlexMono-SemiBold.ttf") format("truetype");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url("/fonts/IBMPlexMono-Bold.ttf") format("truetype");font-weight:700;font-style:normal;font-display:swap}

/* --------------------------------------------------------------- 2. tokens */
:root{
  --bg:#000;
  --band:#171612;
  --paper:#EDEAE3;
  --text2:#C9C4B8;
  --muted:#A9A396;
  --line:#2E2C26;
  --line-strong:#3A382F;
  --accent:#6E9E7E;
  --accent-fill:#14603A;
  --accent-hover:#1B6E30;
  --alert:#F03829;
  --vfr:#00d200; --mvfr:#4488ff; --ifr:#ff3333; --lifr:#b43cb4;
  color-scheme:dark;
}

/* ----------------------------------------------------------------- 3. base */
*,*::before,*::after{box-sizing:border-box}
html,body{background:var(--bg);color:var(--paper);font:13px/1.55 "IBM Plex Mono",ui-monospace,monospace}
html{-webkit-text-size-adjust:100%}
body{margin:0}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
a:hover{color:var(--paper)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* --------------------------------------------------------------- 4. layout */
.wrap{max-width:1160px;margin:0 auto;padding:0 72px;box-sizing:content-box}
.section{padding:60px 0;border-top:1px solid var(--line)}
.section.tight{padding:40px 0}
.tight-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center}
.band{background:var(--band)}
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,480px),1fr));gap:56px;align-items:center}
.split.rev>:first-child{order:2}
.stack{display:flex;flex-direction:column;gap:22px}

/* ----------------------------------------------------------------- 5. type */
h1,h2,h3{font-family:"Archivo Black",sans-serif;font-weight:400;margin:0;text-wrap:balance}
h1{font-size:clamp(36px,5.2vw,76px);line-height:.95}
h2{font-size:clamp(27px,3.2vw,44px);line-height:1}
h3{font-size:20px;line-height:1.1}
.eyebrow{font-size:11px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}
.lede{font-size:13px;color:var(--text2);max-width:540px;margin:0;text-wrap:pretty}
.hero-sub{font-size:15px;color:var(--paper);max-width:620px;margin:0;text-wrap:pretty}
.fine{font-size:11px;color:var(--muted);letter-spacing:.06em;margin:0}

/* ----------------------------------------------------------- 6. components */
.btn{display:inline-block;background:var(--accent-fill);color:var(--paper);text-decoration:none;
  font-family:"Archivo Black",sans-serif;font-weight:400;letter-spacing:.08em;padding:18px 26px;
  border:0;border-radius:0;cursor:pointer;line-height:1.2;text-transform:uppercase}
.btn:hover{background:var(--accent-hover);color:var(--paper)}
.btn-2{display:inline-block;border:1px solid var(--line-strong);background:transparent;color:var(--paper);
  text-decoration:none;font-weight:600;font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  padding:18px 22px;border-radius:0;line-height:1.2}
.btn-2:hover{border-color:var(--accent);color:var(--paper)}
.btn-2.sage{border-color:var(--accent);color:var(--accent);font-weight:700;padding:16px 20px;white-space:nowrap}
.btn-2.sage:hover{color:var(--paper)}
.btns{display:flex;gap:12px;flex-wrap:wrap}

/* Hero: text stack over a full-width screenshot. */
.hero .wrap{padding-top:96px;padding-bottom:60px;display:flex;flex-direction:column;gap:22px}
.hero h1{max-width:980px}
.hero .shot{margin-top:18px}

/* Screenshot: square, hairline border, nothing behind it. */
.shot img{border:1px solid var(--line-strong);width:100%}
.shot figcaption{font-size:11px;letter-spacing:.06em;color:var(--muted);margin-top:10px}
figure{margin:0}

/* Command table (BlipSat): chip + name · description. */
.cmd-table{border-top:2px solid var(--accent)}
.cmd-table>div{display:grid;grid-template-columns:minmax(0,120px) minmax(0,1fr);gap:16px;align-items:baseline;
  padding:14px 0;border-bottom:1px solid var(--line)}
.cmd-table .c{font-weight:700;color:var(--paper);white-space:nowrap}
.cmd-table .d{color:var(--muted);font-size:12px}
.chip{display:inline-block;width:10px;height:10px;margin-right:10px;vertical-align:baseline}
.vfr{background:var(--vfr)} .mvfr{background:var(--mvfr)} .ifr{background:var(--ifr)} .lifr{background:var(--lifr)}

/* Platform grid: one square cell per platform, hairline dividers. */
.platforms{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));
  border-top:2px solid var(--accent);border-left:1px solid var(--line)}
.platform{display:flex;flex-direction:column;gap:14px;padding:24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.platform p{margin:0;color:var(--muted);font-size:12px;flex:1}
.platform .btn{align-self:flex-start;font-size:12px;padding:14px 18px}
.soon{align-self:flex-start;font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);border:1px solid var(--line-strong);padding:12px 16px}

/* ------------------------------------------------ 7. header, nav, footer */
.site-header{position:sticky;top:0;z-index:5;background:var(--bg);border-bottom:1px solid var(--line)}
.hdr{max-width:1160px;margin:0 auto;padding:18px 72px;box-sizing:content-box;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;flex:none;color:var(--paper);text-decoration:none;
  font-family:"Archivo Black",sans-serif;font-size:22px;letter-spacing:.04em;line-height:1}
.brand:hover{color:var(--paper)}
/* The mark: the four flight categories as a 2x2 grid of squares. */
.mark{display:grid;grid-template-columns:repeat(2,9px);gap:3px}
.mark i{display:block;width:9px;height:9px}
.mark i:nth-child(1){background:var(--vfr)} .mark i:nth-child(2){background:var(--mvfr)}
.mark i:nth-child(3){background:var(--ifr)} .mark i:nth-child(4){background:var(--lifr)}
.nav{display:flex;align-items:center;gap:24px;flex-wrap:wrap;justify-content:flex-end}
.nav a,.menu nav a{font-weight:600;font-size:11px;letter-spacing:.16em;color:var(--paper);text-decoration:none;text-transform:uppercase}
.nav a:hover,.menu nav a:hover{color:var(--accent)}
.nav a.btn.start,.menu nav a.btn.start{background:var(--accent-fill);color:var(--paper);padding:10px 16px;
  font-family:"IBM Plex Mono",monospace;font-weight:600;letter-spacing:.16em}
.nav a.btn.start:hover,.menu nav a.btn.start:hover{background:var(--accent-hover);color:var(--paper)}
/* Phone menu: a no-JS <details> toggle, shown only below 560px. */
.menu{display:none;position:relative}
.menu summary{list-style:none;cursor:pointer;font-weight:600;font-size:11px;letter-spacing:.16em;color:var(--paper);
  border:1px solid var(--line-strong);padding:9px 14px}
.menu summary::-webkit-details-marker{display:none}
.menu[open] summary{border-color:var(--accent);color:var(--accent)}
.menu nav{position:absolute;right:0;top:calc(100% + 10px);min-width:220px;background:var(--bg);
  border:1px solid var(--line-strong);padding:10px 0;display:flex;flex-direction:column}
.menu nav a{display:block;padding:12px 18px}
.menu nav a.btn.start{margin:8px 18px 4px;text-align:center}

.site-footer{border-top:1px solid var(--line)}
.ftr{padding-top:28px;padding-bottom:28px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:11px;color:var(--muted);letter-spacing:.06em}
.ftr .who{text-transform:uppercase}
.ftr a{color:var(--muted)}
.ftr a:hover{color:var(--paper)}
.ftr-legal{padding-bottom:24px;font-size:11px;color:var(--muted)}

/* ------------------------------------------------------ 8. document pages */
.doc{max-width:760px;padding-top:56px;padding-bottom:40px;overflow-wrap:anywhere;font-size:14px;color:var(--text2)}
.doc h1{font-size:clamp(30px,4vw,48px);line-height:1;margin-bottom:14px;color:var(--paper)}
.doc h2{font-size:18px;line-height:1.15;margin:40px 0 12px;padding-top:14px;border-top:1px solid var(--line);color:var(--paper)}
.doc strong{color:var(--paper)}
.doc .updated{font-size:11px;letter-spacing:.06em;color:var(--muted);margin-bottom:32px}
.doc .warn{border:1px solid var(--line-strong);border-left:3px solid var(--alert);background:var(--band);padding:16px 20px;margin:24px 0}
.doc .warn h2{border-top:0;padding-top:0;margin-top:0}
.doc-note{max-width:760px;margin:32px auto 0;font-size:11px;letter-spacing:.06em;color:var(--muted);
  border-left:3px solid var(--accent);padding-left:12px}

/* --------------------------------------------------------- 9. responsive */
@media(max-width:900px){
  .wrap{padding:0 40px}
  .hdr{padding:18px 40px}
}
@media(max-width:560px){
  .wrap{padding:0 16px}
  .hdr{padding:14px 16px}
  .site-header .nav{display:none}
  .menu{display:block}
  .section{padding:44px 0}
  .hero .wrap{padding-top:56px}
  .tight-grid{grid-template-columns:1fr;justify-items:start}
  .cmd-table>div{grid-template-columns:1fr;gap:4px}
}