/* AirDare: the HEIVOC flyer's look on the web (brand book: brand.html). Measured from the flyer (2026-09-22) and
   the previous airdare.com page: Inter on near-black, giant ghost wordmarks, letter-spaced caps, chrome renders,
   thin white line diagrams, glass cards with a hairline border. */
:root{
  --black:#0d0d0d;      /* the flyer's deepest black, the page edge */
  --page:#101010;       /* the page, near-black as the flyer (every render's background is mapped onto it) */
  --panel:#1a1a1a;      /* a card */
  --line:rgba(255,255,255,.16);   /* hairlines and card borders */
  --ghost:rgba(255,255,255,.06);  /* the giant wordmark behind a title */
  --white:#e6e6e3;      /* the brightest colour: a soft off-white (operator 2026-10-03: "don't use the brightest white") */
  --silver:#b8b8b8;     /* letter-spaced caps (the tagline) */
  --grey:#9a9a9a;       /* captions and body copy */
  --chrome:#c9ccd1;     /* the renders' highlight, for accents */
  --text:"Inter",-apple-system,"Segoe UI",sans-serif;
  --gut:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}   /* anchors land below the sticky header */
body{margin:0;background:var(--page);color:var(--white);font:400 16px/1.6 var(--text);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--white);text-decoration-color:var(--line);text-underline-offset:4px}
a:hover{text-decoration-color:var(--white)}
a:focus-visible{outline:2px solid var(--chrome);outline-offset:3px}
.wrap{max-width:1200px;margin:0 auto;padding:0 var(--gut)}

/* the letter-spaced caps line: the flyer's "R E U S A B L E  A E R I A L ..." */
.caps{font:400 13px/1.4 var(--text);letter-spacing:.55em;text-transform:uppercase;color:var(--silver);margin:0}

/* header */
header{position:sticky;top:0;z-index:10;background:rgba(16,16,16,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
header img{height:26px;width:auto;filter:brightness(.9)}   /* the wordmark PNG is pure white */
.skip{position:absolute;left:-999px;top:8px;background:var(--white);color:var(--page);padding:8px 14px;border-radius:6px;z-index:20}
.skip:focus{left:16px}
nav{display:flex;gap:28px}
nav a{font:500 12px var(--text);letter-spacing:.24em;text-transform:uppercase;color:var(--silver);text-decoration:none}
nav a:hover{color:var(--white)}

/* hero */
.hero{position:relative;overflow:hidden;padding:120px 0 96px;text-align:center;
  background:radial-gradient(60% 55% at 50% 40%,#1f1f1f 0%,var(--page) 70%)}
.hero h1{font:600 clamp(26px,3.4vw,42px)/1.1 var(--text);letter-spacing:.06em;margin:22px auto 18px;max-width:16em}   /* capitals, a little tracked, like the flyer */
.hero p.lead{color:var(--grey);font-size:18px;margin:0 auto;max-width:34em}
.hero .pair{display:grid;grid-template-columns:1fr 1fr;gap:48px;max-width:980px;margin:72px auto 0}
.hero .pair a{text-decoration:none}
.hero .pair img{height:300px;width:100%;object-fit:contain}
.hero .pair .caps{margin-top:18px}

/* a product section: the ghost wordmark behind the name, the caps line under it */
.product{position:relative;padding:112px 0;border-top:1px solid var(--line);overflow:clip}   /* clip, not hidden: hidden would break the sticky HEIVOC turn */
.ghost{position:absolute;left:50%;top:24px;transform:translateX(-50%);font:700 clamp(120px,22vw,300px)/1 var(--text);
  letter-spacing:-.02em;white-space:nowrap;pointer-events:none;user-select:none;
  background:linear-gradient(180deg,rgba(255,255,255,.13),rgba(255,255,255,0) 85%);-webkit-background-clip:text;background-clip:text;color:transparent}
.product h2{position:relative;font:600 clamp(40px,6vw,72px)/1 var(--text);letter-spacing:.02em;margin:0 0 14px;text-align:center}
.product .caps{position:relative;text-align:center}
.product .body{position:relative;display:grid;grid-template-columns:1.15fr 1fr;gap:56px;align-items:center;margin-top:64px}
.product.flip .body{grid-template-columns:1fr 1.15fr}
.product.flip .media{order:2}
.media img{width:100%;height:auto}
.points{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.points li{padding:16px 0;border-bottom:1px solid var(--line);color:var(--silver);font-size:17px;line-height:1.5}
.points li b{color:var(--white);font-weight:600}

/* glass cards (the flyer's stat boxes, used here for concepts, never numbers) */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:56px;position:relative}
.card{background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.015));border:1px solid rgba(255,255,255,.2);
  border-radius:18px;padding:24px 24px 20px;box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 12px 32px rgba(0,0,0,.35)}
.card h3{font:500 13px var(--text);letter-spacing:.24em;text-transform:uppercase;color:var(--silver);margin:0 0 6px}
.card p{margin:0 0 14px;color:var(--grey);font-size:15px}
.card svg{display:block;width:100%;height:auto}

/* the line diagrams */
.diagram{stroke:var(--white);fill:none;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.diagram .dash{stroke-dasharray:6 6;opacity:.75}
.diagram .faint{opacity:.35}
.diagram .fill{fill:var(--white);stroke:none}
.diagram text{fill:var(--grey);stroke:none;font:500 11px var(--text);letter-spacing:.18em;text-transform:uppercase}

/* the mission: four steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:56px;position:relative}
.step{border:1px solid rgba(255,255,255,.2);border-radius:18px;padding:20px;background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.01));box-shadow:inset 0 1px 0 rgba(255,255,255,.08)}
.step .n{font:600 12px var(--text);letter-spacing:.24em;color:var(--silver)}
.step h3{font:600 18px/1.3 var(--text);margin:6px 0 4px}
.step p{margin:0 0 14px;color:var(--grey);font-size:14px}
.uses{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:40px 0 0;padding:0;list-style:none;position:relative}
.uses li{border:1px solid var(--line);border-radius:999px;padding:8px 16px;font:500 13px var(--text);letter-spacing:.06em;color:var(--silver)}

/* contact and footer */
.contact{padding:112px 0;text-align:center;border-top:1px solid var(--line)}
.contact h2{font:600 clamp(28px,4vw,44px)/1.15 var(--text);margin:18px 0 10px}
.contact p{color:var(--grey);margin:0 0 28px}
.contact p.fine{font-size:13px;margin:28px 0 0}
.btn{display:inline-block;border:1px solid var(--white);border-radius:999px;padding:14px 28px;font:600 13px var(--text);
  letter-spacing:.2em;text-transform:uppercase;color:var(--white);text-decoration:none}
.btn:hover{background:var(--white);color:var(--page)}
footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--grey);font-size:13px}
footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
footer a{display:inline-block;padding:12px 0}

@media(max-width:860px){
  header .wrap{height:auto;flex-direction:column;align-items:flex-start;gap:6px;padding-top:12px;padding-bottom:4px}
  nav{gap:20px;overflow-x:auto;width:100%;padding-bottom:8px}
  nav a{white-space:nowrap;padding:8px 0}
  .hero{padding:80px 0 64px}
  .hero .pair{grid-template-columns:1fr;gap:40px;margin-top:48px}
  .hero .pair img{height:220px}
  .product{padding:80px 0}
  .product .body,.product.flip .body{grid-template-columns:1fr;gap:32px;margin-top:40px}
  .product.flip .media{order:0}
  .cards{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .caps{letter-spacing:.32em}
}
@media(max-width:520px){.steps{grid-template-columns:1fr}}

/* BUZCO's standoff delivery, under its description */
.delivery{position:relative;margin-top:72px;text-align:center}
.delivery .steps{text-align:left;margin-top:28px}
/* HEIVOC turning: held in the middle of the screen while it makes its turn (js/turntable.js) */
.spin{position:relative}
.spin-pin{position:sticky}
.spin canvas{display:block;width:100%;height:auto;max-height:70vh;object-fit:contain}
.logo img,.tile img{filter:brightness(.9)}
/* pictures on the page black: their black gives way to whatever lies behind (the hero's soft gradient) */
.hero img,.media img,.spin canvas{mix-blend-mode:lighten}
/* HEIVOC: the turn spans the section, its points in two columns under it */
#heivoc .body{grid-template-columns:1fr;gap:24px}
#heivoc .points{display:grid;grid-template-columns:1fr 1fr;column-gap:48px}
#heivoc .spin canvas{margin:0 auto;width:auto;max-width:100%}
#heivoc .spin-pin.row{margin-top:0}
#heivoc .spin{margin-top:40px}
@media(max-width:860px){#heivoc .points{grid-template-columns:1fr}}
/* one line per item (operator 2026-10-03: "make sure that each item takes only one line"): items are written short;
   pills never wrap */
.uses li{white-space:nowrap}
.delivery-title{font:600 clamp(28px,4vw,44px)/1.15 var(--text);margin:14px 0 0}
/* the product rows, laid out like the sister site's product rows (operator 2026-10-04):
   name and status chip, one-line spec rows with info dots, a line of copy, a briefing link; the picture opposite */
.row{display:grid;grid-template-columns:1fr 1.2fr;gap:56px;align-items:center;margin-top:56px}
.row.flip{grid-template-columns:1.2fr 1fr}
.row .head{display:flex;align-items:center;gap:14px;margin:0 0 18px}
.row h3{margin:0;font:600 30px/1.1 var(--text);letter-spacing:.04em}
.tag{font:500 11px/1 var(--text);letter-spacing:.2em;text-transform:uppercase;color:var(--page);background:var(--chrome);padding:6px 8px}
.specs{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.specs li{display:flex;align-items:center;gap:6px;padding:11px 0;border-bottom:1px solid var(--line);font-size:16px;line-height:24px;white-space:nowrap}
.specs .k{min-width:120px;color:var(--grey);font-weight:500}
.specs .v{color:var(--white)}
.dot{all:unset;position:relative;display:inline-grid;place-items:center;width:20px;height:20px;margin-left:4px;cursor:help}
.dot svg{width:20px;height:20px;display:block}
.dot:focus-visible{outline:2px solid var(--chrome);outline-offset:2px;border-radius:50%}
.dot::after{content:attr(data-tip);position:absolute;bottom:calc(100% + 10px);left:50%;transform:translateX(-50%);width:max-content;
  max-width:260px;background:var(--white);color:var(--page);font:400 13px/20px var(--text);padding:8px 12px;border-radius:4px;
  white-space:normal;display:none;z-index:10;pointer-events:none}
.dot:hover::after,.dot:focus::after,.dot.open::after{display:block}
.copy{margin:20px 0 0;color:var(--silver);font-size:16px}
.links{list-style:none;margin:20px 0 0;padding:0;border-top:1px solid var(--line)}
.links li{border-bottom:1px solid var(--line)}
.links a{display:block;padding:10px 4px;font:500 14px var(--text);letter-spacing:.12em;text-transform:uppercase;text-decoration:none}
.links a::after{content:" \2192";float:right}
@media(max-width:860px){.row,.row.flip{grid-template-columns:1fr;gap:28px}.row.flip .media{order:-1}
  .specs li{white-space:normal}.dot::after{position:fixed;left:16px;right:16px;bottom:16px;transform:none;width:auto;max-width:none}}
@media(max-width:860px){#heivoc .spin-pin .media{order:-1}#heivoc .spin canvas{max-height:30vh}
  .specs li{white-space:nowrap;font-size:15px;padding:9px 0}.specs .k{min-width:96px}.row .head{margin-bottom:12px}#heivoc .copy{display:none}}   /* the held panel must fit a phone screen */