/* altusairtech.com — the public site. Colours are the app's own tokens (tokens/altus.tokens.json):
   night.900 canvas, ink.100 / ink.400 text, blue.500 for links. Light scheme for readers who ask for it. */
@font-face {
  font-family: 'Archivo';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('/assets/archivo-var.woff2') format('woff2');
}

:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --card: #1a1a24;
  --rule: #2a2a3a;
  --fg: #f0f0f5;
  --dim: #8888a0;
  --link: #4f8ef7;
  --measure: 44rem;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --surface: #f6f7fa;
    --card: #ffffff;
    --rule: #e3e6ee;
    --fg: #14161c;
    --dim: #5a6070;
    --link: #2563eb;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 'Archivo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--link); }
a:hover { text-decoration-thickness: 2px; }

.wrap { max-width: 68rem; margin: 0 auto; padding: 0 1rem; }
@media (min-width: 40rem) { .wrap { padding: 0 1.5rem; } }

/* Header */
.top { border-bottom: 1px solid var(--rule); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 4rem; }
.brand { display: flex; align-items: center; gap: .6rem; color: var(--fg); text-decoration: none; font-weight: 700; letter-spacing: .01em; }
.brand img { height: 1.6rem; width: auto; }
@media (prefers-color-scheme: light) { .brand img { filter: invert(1); } }
.nav { display: flex; align-items: center; gap: 1.25rem; font-size: .95rem; }
.nav a { color: var(--dim); text-decoration: none; }
.nav a:hover { color: var(--fg); }
.nav .signin { color: var(--fg); border: 1px solid var(--rule); border-radius: 8px; padding: .4rem .8rem; }
@media (max-width: 30rem) { .nav .hide-sm { display: none; } }

/* Home */
.hero { padding: 4.5rem 0 3.5rem; }
.eyebrow { color: var(--dim); font-size: .85rem; letter-spacing: .08em; text-transform: uppercase; margin: 0 0 1rem; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.1; letter-spacing: -.02em; margin: 0 0 1.25rem; max-width: 40rem; }
.tagline { font-size: clamp(1.25rem, 2.6vw, 1.6rem); font-weight: 600; letter-spacing: -.01em; margin: -.5rem 0 1rem; max-width: 38rem; }
.lede { font-size: 1.15rem; color: var(--dim); max-width: 38rem; margin: 0 0 2rem; }
.cta { display: inline-block; background: var(--fg); color: var(--bg); text-decoration: none; font-weight: 600; border-radius: 8px; padding: .7rem 1.2rem; }

section.band { border-top: 1px solid var(--rule); padding: 3.5rem 0; }
section.band h2 { font-size: 1.5rem; letter-spacing: -.01em; margin: 0 0 .75rem; }
section.band > .wrap > p { color: var(--dim); max-width: 42rem; margin: 0 0 2rem; }

.grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 40rem) { .grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 64rem) { .grid.three { grid-template-columns: 1fr 1fr 1fr; } }
.card { background: var(--card); border: 1px solid var(--rule); border-radius: 12px; padding: 1.25rem 1.25rem 1rem; }
.card h3 { font-size: 1.05rem; margin: 0 0 .4rem; }
.card p { color: var(--dim); margin: 0 0 .5rem; }
.card code { font-size: .85rem; }

code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--surface); border: 1px solid var(--rule); border-radius: 4px; padding: .05em .35em; overflow-wrap: anywhere; }

/* Legal pages */
.doc { max-width: var(--measure); margin: 0 auto; padding: 3rem 1rem 5rem; }
@media (min-width: 40rem) { .doc { padding: 3.5rem 1.5rem 6rem; } }
.doc h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .5rem; letter-spacing: -.01em; }
.doc .updated { color: var(--dim); margin: 0 0 2rem; }
.doc h2 { font-size: 1.25rem; margin: 2.5rem 0 .75rem; padding-top: 1.25rem; border-top: 1px solid var(--rule); }
.doc h3 { font-size: 1.05rem; margin: 1.75rem 0 .5rem; }
.doc p { margin: 0 0 1rem; }
.doc ul { margin: 0 0 1rem; padding-left: 1.3rem; }
.doc li { margin: .35rem 0; }
.doc blockquote { margin: 1.25rem 0; padding: .9rem 1.1rem; border: 1px solid var(--rule); background: var(--surface); border-radius: 8px; }
.doc blockquote > :last-child { margin-bottom: 0; }
.tw { overflow-x: auto; margin: 0 0 1rem; }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { border: 1px solid var(--rule); padding: .55rem .65rem; text-align: left; vertical-align: top; }
th { background: var(--surface); font-weight: 650; }

/* Footer */
.foot { border-top: 1px solid var(--rule); color: var(--dim); font-size: .9rem; }
.foot .wrap { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; justify-content: space-between; padding-top: 1.5rem; padding-bottom: 2rem; }
.foot nav { display: flex; flex-wrap: wrap; gap: 1.25rem; }
.foot a { color: var(--dim); }