/* SGL 20X design system: FIELD/70, the instrument aesthetic.
   Rules (full manifesto in BUILD.md):
   1. The ground is the instrument at night: near-black navy, always.
   2. One signal: electric ice #4DF0FF, spent only on live data and interaction.
   3. Hairline ice geometry on an 80px survey grid; panels are frames, not cards.
   4. Two voices: a huge quiet display sans, and telemetry mono micro-labels.
   5. Motion is instrumentation waking up: sweeps, counters, readouts.
   6. Photography appears only as data: duotone, framed, captioned.
   The only gradient is the ground-fade scrim over motion media.
   The only glass surface is the header. */
:root{
  --ground:#04070C; --panel:#070D16; --panel2:#0A141F;
  --ink:#E9F3FA; --body:#B7CBDE; --dim:#7E97AC;
  --ice:#B2D7E4; --signal:#4DF0FF;
  --line:rgba(178,215,228,.14); --line2:rgba(178,215,228,.30);
  --disp:"Helvetica Neue",Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --max:1240px;
  --sat:env(safe-area-inset-top,0px); --sab:env(safe-area-inset-bottom,0px);
  --sal:env(safe-area-inset-left,0px); --sar:env(safe-area-inset-right,0px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--ground);color:var(--body);font-family:var(--disp);
  font-size:17px;line-height:1.62;font-weight:300;
  padding-left:var(--sal);padding-right:var(--sar);padding-bottom:calc(84px + var(--sab))}
@media(min-width:960px){body{padding-bottom:0}}
::selection{background:var(--signal);color:var(--ground)}
a{color:var(--signal);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.label{font-family:var(--mono);font-size:.68rem;letter-spacing:.24em;text-transform:uppercase;color:var(--dim)}
.label .sig{color:var(--signal)}
h1,h2,h3{color:var(--ink);font-weight:200;line-height:1.04;letter-spacing:-.015em}
h2{font-size:clamp(2rem,4.6vw,3.4rem)}
h3{font-size:clamp(1.3rem,2.4vw,1.7rem);font-weight:300}
.lede{font-size:clamp(1.06rem,1.6vw,1.28rem);color:var(--body);max-width:62ch;font-weight:300}
section{padding:clamp(64px,9vw,110px) 0}
.sec-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  border-top:1px solid var(--line);padding-top:14px;margin-bottom:clamp(28px,4vw,48px)}
.sec-head h2{margin-top:10px}

/* concept bar */
.concept{background:var(--ground);border-bottom:1px solid var(--line);
  font-family:var(--mono);font-size:.64rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--dim);text-align:center;padding:calc(8px + var(--sat)) 14px 8px}
.concept b{color:var(--signal);font-weight:400}

/* header, the one glass surface */
header.site{position:sticky;top:0;z-index:50;background:rgba(4,7,12,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 0}
.brand{color:var(--ink);line-height:1.02;display:block}
.brand .nm{display:block;font-size:1.06rem;letter-spacing:.14em;font-weight:400}
.brand .sb{display:block;font-family:var(--mono);font-size:.6rem;letter-spacing:.3em;color:var(--signal);margin-top:4px;text-transform:uppercase}
.brand:hover{text-decoration:none}
#menuBtn{display:inline-flex;align-items:center;gap:9px;min-height:48px;min-width:48px;
  padding:10px 16px;background:transparent;color:var(--ink);border:1px solid var(--line2);
  font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;cursor:pointer;text-transform:uppercase}
nav#mainNav{display:none;border-top:1px solid var(--line)}
nav#mainNav.open{display:block}
nav#mainNav a{display:flex;align-items:center;gap:12px;min-height:52px;padding:10px 2px;
  color:var(--ink);font-family:var(--mono);font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;
  border-bottom:1px solid var(--line)}
nav#mainNav a .no{color:var(--signal);font-size:.64rem}
nav#mainNav a[aria-current="page"]{color:var(--signal)}
nav#mainNav .navmore .lbl{font-family:var(--mono);font-size:.62rem;letter-spacing:.26em;
  text-transform:uppercase;color:var(--dim);padding:16px 2px 4px}
nav#mainNav .navmore a{border-bottom:0;min-height:48px;color:var(--body)}
@media(min-width:960px){
  #menuBtn{display:none}
  nav#mainNav{display:block;border-top:0}
  nav#mainNav .wrap.main{display:flex;justify-content:flex-end;gap:6px 30px;padding-top:0;padding-bottom:14px}
  nav#mainNav a{border-bottom:0;min-height:44px;padding:4px 0}
  nav#mainNav .navmore{display:none}
  .hbar{padding-bottom:2px}
}

/* breadcrumbs */
.crumbs{font-family:var(--mono);font-size:.66rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--dim);padding:22px 0 0}
.crumbs a{color:var(--body)}
.crumbs .sep{margin:0 10px;color:var(--signal)}

/* page head */
.pagehead{padding:clamp(30px,5vw,54px) 0 0}
.pagehead h1{font-size:clamp(2.7rem,7vw,5.2rem);margin:16px 0 18px}
.pagehead .tagline{font-family:var(--mono);font-size:.7rem;letter-spacing:.3em;
  text-transform:uppercase;color:var(--signal)}

/* hero (home) */
.hero{position:relative;min-height:94svh;display:flex;align-items:flex-end;overflow:hidden;
  border-bottom:1px solid var(--line)}
.hero video,.hero .fallback{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero .fallback{display:none}
.hero .scrim{position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,7,12,.42) 0%,rgba(4,7,12,.06) 38%,rgba(4,7,12,.88) 100%)}
.hero .inner{position:relative;z-index:2;width:100%;padding:120px 0 34px}
.hero h1{font-size:clamp(2.9rem,8.4vw,6.6rem);max-width:12ch;margin:18px 0 20px}
.hero h1 .sig{color:var(--signal)}
.hero .lede{max-width:56ch}
.telebar{display:flex;flex-wrap:wrap;gap:10px 34px;margin-top:38px;padding-top:16px;
  border-top:1px solid var(--line2);font-family:var(--mono);font-size:.7rem;
  letter-spacing:.18em;text-transform:uppercase;color:var(--dim)}
.telebar b{display:block;color:var(--ink);font-size:1.02rem;letter-spacing:.04em;font-weight:400;margin-top:3px;text-transform:none}
.telebar .live b{color:var(--signal)}
.herocta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{display:inline-flex;align-items:center;min-height:52px;padding:12px 26px;
  border:1px solid var(--signal);color:var(--signal);font-family:var(--mono);
  font-size:.76rem;letter-spacing:.2em;text-transform:uppercase;background:transparent;cursor:pointer}
.btn:hover{background:var(--signal);color:var(--ground);text-decoration:none}
.btn.ghost{border-color:var(--line2);color:var(--ink)}
.btn.ghost:hover{border-color:var(--signal);color:var(--signal);background:transparent}
@media (prefers-reduced-motion:reduce){
  .hero video{display:none}
  .hero .fallback{display:block}
}

/* index rows */
.rows{border-top:1px solid var(--line)}
.rows a,.rows .row{display:grid;grid-template-columns:52px 1fr;gap:6px 18px;
  padding:26px 2px;border-bottom:1px solid var(--line);color:var(--body);align-items:baseline}
.rows a:hover{text-decoration:none;background:var(--panel)}
.rows .no{font-family:var(--mono);font-size:.7rem;color:var(--signal);letter-spacing:.14em}
.rows .nm{color:var(--ink);font-size:clamp(1.45rem,3.2vw,2.3rem);font-weight:200;line-height:1.1}
.rows .ds{grid-column:2;max-width:64ch}
.rows .go{grid-column:2;font-family:var(--mono);font-size:.66rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--signal)}
@media(min-width:860px){
  .rows a,.rows .row{grid-template-columns:70px 1.1fr 1.4fr 120px}
  .rows .ds{grid-column:auto}
  .rows .go{grid-column:auto;text-align:right}
}

/* stats */
.stats{display:grid;grid-template-columns:1fr 1fr;gap:26px 20px}
.stats .n{color:var(--ink);font-size:clamp(2.7rem,6vw,4.6rem);font-weight:200;line-height:1;font-variant-numeric:tabular-nums}
.stats .n em{font-style:normal;color:var(--signal)}
.stats .l{font-family:var(--mono);font-size:.64rem;letter-spacing:.22em;text-transform:uppercase;color:var(--dim);margin-top:9px}
@media(min-width:860px){.stats{grid-template-columns:repeat(4,1fr)}}

/* frames and figures */
.fig{border:1px solid var(--line);background:var(--panel);padding:10px}
.fig figcaption{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;color:var(--dim);
  text-transform:uppercase;margin-top:9px}
.fig figcaption b{color:var(--signal);font-weight:400}
.duo{filter:saturate(.9) contrast(1.02)}
.grid2{display:grid;gap:26px}
@media(min-width:900px){.grid2{grid-template-columns:1fr 1fr;gap:44px}.grid2.wide{grid-template-columns:5fr 7fr}}
.grid3{display:grid;gap:22px}
@media(min-width:900px){.grid3{grid-template-columns:repeat(3,1fr)}}
p+p{margin-top:14px}
.copy p{max-width:68ch}
.copy ul{margin:12px 0 0 20px}
.copy li{margin-bottom:7px;max-width:64ch}

/* spec tables */
.twrap{overflow-x:auto;border:1px solid var(--line);background:var(--panel)}
table.spec-t{width:100%;border-collapse:collapse;font-size:.98rem;min-width:580px}
table.spec-t th,table.spec-t td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;color:var(--body)}
table.spec-t th{font-family:var(--mono);font-size:.64rem;letter-spacing:.2em;text-transform:uppercase;color:var(--signal);border-bottom:1px solid var(--line2)}
table.spec-t td.n,table.spec-t th.n{font-variant-numeric:tabular-nums;white-space:nowrap}
table.spec-t td:first-child{color:var(--ink)}
table.spec-t tr:last-child td{border-bottom:0}

/* aircraft cards */
.acard{border:1px solid var(--line);background:var(--panel);padding:0 0 24px}
.acard .fig{border:0;border-bottom:1px solid var(--line);padding:0;background:none}
.acard .fig figcaption{padding:9px 18px 0}
.acard .in{padding:20px 22px 0}
.acard h3{margin:8px 0 10px}
.spec-list{margin-top:14px;border-top:1px solid var(--line)}
.spec-list div{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px solid var(--line)}
.spec-list .k{font-family:var(--mono);font-size:.64rem;letter-spacing:.18em;text-transform:uppercase;color:var(--dim)}
.spec-list .v{font-family:var(--mono);font-size:.82rem;color:var(--ink);text-align:right;font-variant-numeric:tabular-nums}

/* probe and planner consoles */
.console{border:1px solid var(--line2);background:var(--panel);padding:0}
.console .chead{display:flex;justify-content:space-between;gap:14px;padding:13px 18px;
  border-bottom:1px solid var(--line);font-family:var(--mono);font-size:.66rem;
  letter-spacing:.22em;text-transform:uppercase;color:var(--dim)}
.console .chead b{color:var(--signal);font-weight:400}
.console canvas{display:block;width:100%;height:auto;touch-action:none;background:var(--ground)}
.readouts{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.readouts div{padding:14px 18px;border-right:1px solid var(--line)}
.readouts div:last-child{border-right:0}
.readouts .v{color:var(--ink);font-family:var(--mono);font-size:clamp(1.1rem,2.6vw,1.6rem);font-variant-numeric:tabular-nums}
.readouts .v em{font-style:normal;color:var(--signal)}
.readouts .k{font-family:var(--mono);font-size:.6rem;letter-spacing:.22em;text-transform:uppercase;color:var(--dim);margin-top:4px}
.planner{padding:24px 22px}
.planner form{display:grid;gap:16px}
@media(min-width:860px){.planner form{grid-template-columns:repeat(4,1fr)}}
.planner label{font-family:var(--mono);font-size:.64rem;letter-spacing:.2em;text-transform:uppercase;color:var(--dim);display:block;margin-bottom:8px}
.planner input,.planner select{width:100%;min-height:52px;font-size:16px;padding:10px 14px;
  background:var(--ground);border:1px solid var(--line2);color:var(--ink);font-family:var(--mono)}
.formula{font-family:var(--mono);font-size:.74rem;color:var(--dim);margin-top:16px;line-height:1.7}

/* news and papers lists */
.plist{border-top:1px solid var(--line)}
.plist article{padding:26px 2px;border-bottom:1px solid var(--line)}
.plist .meta{font-family:var(--mono);font-size:.66rem;letter-spacing:.22em;text-transform:uppercase;color:var(--signal)}
.plist h3{margin:8px 0 8px}
.plist p{max-width:66ch}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.chips span{border:1px solid var(--line2);padding:9px 14px;font-family:var(--mono);
  font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--body)}

/* job and steps */
.job{border:1px solid var(--line2);background:var(--panel);padding:clamp(22px,4vw,36px)}
.job h3{margin:10px 0 12px;font-size:clamp(1.6rem,3.4vw,2.3rem)}
.steps{display:grid;gap:16px;margin-top:24px}
@media(min-width:860px){.steps{grid-template-columns:repeat(3,1fr)}}
.steps div{border:1px solid var(--line);background:var(--panel);padding:20px}
.steps .n{font-family:var(--mono);color:var(--signal);font-size:.8rem}
.steps h3{font-size:1.1rem;margin:10px 0 8px;font-weight:300}

/* next step */
.next{border:1px solid var(--line2);background:var(--panel2);padding:clamp(28px,5vw,52px)}
.next h2{max-width:20ch}
.next p{margin-top:14px;max-width:60ch}

/* band image */
.band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:0}
.band img{width:100%;height:min(52vh,520px);object-fit:cover}
.band .cap{font-family:var(--mono);font-size:.64rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--dim);padding:11px 20px}
.band .cap b{color:var(--signal);font-weight:400}

/* footer */
footer.site{border-top:1px solid var(--line);background:var(--ground);padding:56px 0 calc(30px + var(--sab))}
footer.site .word{color:var(--ink);font-size:clamp(1.7rem,4.6vw,3rem);font-weight:200;letter-spacing:.06em}
footer.site nav{display:grid;grid-template-columns:1fr 1fr;gap:8px 24px;margin:34px 0}
@media(min-width:860px){footer.site nav{grid-template-columns:repeat(5,1fr)}}
footer.site nav a{display:flex;align-items:center;min-height:44px;color:var(--body);
  font-family:var(--mono);font-size:.7rem;letter-spacing:.18em;text-transform:uppercase}
footer.site nav a:hover{color:var(--signal)}
footer.site .fine{border-top:1px solid var(--line);padding-top:18px;display:grid;gap:8px;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;color:var(--dim);text-transform:uppercase}
footer.site .fine b{color:var(--body);font-weight:400}

/* reveal */
.rv{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
}