/* =========================================================================
   AIT brand system — "Autonomous IT", dark-first.
   Rebuilt from the operator's colors_and_type.css v0.3 with ONE deliberate
   change: the runtime Google-Fonts @import is GONE. This estate is
   offline-capable and telemetry-free; the typefaces are vendored below
   (fonts/, OFL licences alongside), the way www assets are vendored
   elsewhere in nOS.
   Second deliberate change: the brand's heartbeat keyframe is renamed
   `ait-breathe` here — its original name collides with an internal
   service name that this page's leak gate forbids (which is also why
   this comment cannot spell it).
   ========================================================================= */

/* The faces are Latin subsets, cut by the subsetting tool that sits
   beside this stylesheet, from the upstream binaries in fonts/upstream/
   (kept as provenance, never served).
   First visit went from 1,954,484 to 558,540 bytes of typeface — 71% — and
   the saving came from dropping OpenType features this page never asks for,
   not from cutting glyphs; the Latin floor is deliberately generous so Czech
   and Polish copy needs no re-subset. woff2 would roughly halve it again and
   is NOT available: its encoder needs Brotli, absent from every toolchain
   here, and a build dependency for a font was refused.

   The serif and the mono are RENAMED. Both declare Reserved Font Name
   'Source' in their own copyright string, a subset is a Modified Version,
   and OFL clause 3 forbids a Modified Version from carrying the reserved name.
   The original copyright notices travel with the binaries, as clause 1 requires.
   Open Sans declares no reserved name and keeps its own. */
@font-face {
  font-family: "Open Sans";
  src: url("fonts/OpenSans-Variable-Latin.ttf") format("truetype");
  font-weight: 300 800;
  font-stretch: 75% 100%;
  font-display: swap;
}
@font-face {
  font-family: "AIT Serif";          /* subset of Source Serif 4 (Adobe, OFL) */
  src: url("fonts/SourceSerif4-Variable-Latin.ttf") format("truetype");
  font-weight: 200 900;
  font-display: swap;
}
@font-face {
  font-family: "AIT Mono";           /* subset of Source Code Pro (Adobe, OFL) */
  src: url("fonts/SourceCodePro-Variable-Latin.ttf") format("truetype");
  font-weight: 200 900;
  font-display: swap;
}

:root {
  /* canvas */
  --canvas: #0A0B0D;
  --panel: #0F1116;
  --raise: #13161C;
  --sunk: #07080A;
  /* ink — warm cream, never stark white */
  --ink: #F1ECE3;
  --ink-mute: #B8B3AA;
  --ink-dim: #6F6A61;
  --ink-faint: #3A3731;
  /* czech flag blue — kicker, rule, link, action */
  --blue: #11457E;
  --blue-hi: #2A63A8;
  --blue-soft: #6A8CD3;
  --blue-faint: #142240;
  /* czech flag red — STATE ONLY */
  --red: #D7141A;
  --on-red: #25252A;
  /* type */
  --sans: "Open Sans", system-ui, -apple-system, sans-serif;
  --serif: "AIT Serif", Georgia, serif;
  --code: "AIT Mono", ui-monospace, "SF Mono", monospace;
  /* modular scale, ratio 1.25 from 16px */
  --t-0: 1rem;
  --t-1: 1.25rem;
  --t-2: 1.563rem;
  --t-3: 1.953rem;
  --t-4: 2.441rem;
  --t-5: 3.052rem;
  /* 8pt grid */
  --s-1: 8px; --s-2: 16px; --s-3: 24px; --s-4: 32px; --s-6: 48px; --s-8: 64px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { background: var(--canvas); }

body {
  font-family: var(--serif);
  font-size: var(--t-0);
  line-height: 1.6;
  color: var(--ink-mute);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* ---- aurora: cool navy from bottom-left, warm amber from top-right ---- */
.aurora {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}
.aurora::before, .aurora::after {
  content: "";
  position: absolute;
  width: 68vmax; height: 68vmax;
  border-radius: 50%;
  filter: blur(90px);
  mix-blend-mode: screen;
}
.aurora::before {
  left: -24vmax; bottom: -30vmax;
  background: radial-gradient(circle, rgba(17, 69, 126, 0.35), transparent 65%);
}
.aurora::after {
  right: -26vmax; top: -32vmax;
  background: radial-gradient(circle, rgba(196, 138, 62, 0.14), transparent 65%);
}

/* ---- signature: notched corners, never rounded ---- */
.notch {
  clip-path: polygon(
    8px 0, 100% 0, 100% calc(100% - 8px),
    calc(100% - 8px) 100%, 0 100%, 0 8px
  );
}

/* ---- masthead ---- */
.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-3);
  max-width: 1080px;
  margin: 0 auto;
}
.wordmark, .wordmark-sm {
  font-family: var(--code);
  letter-spacing: 0.18em;
  color: var(--ink);
  font-weight: 600;
}
.wordmark { font-size: var(--t-1); }
.wordmark-sm { font-size: 0.8rem; }
.chip-red {
  background: var(--red);
  color: var(--on-red);
  padding: 1px 7px 2px;
  font-weight: 700;
}
.kicker {
  font-family: var(--code);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--blue-soft);
}

/* ---- hero ---- */
main { max-width: 1080px; margin: 0 auto; padding: 0 var(--s-3) var(--s-8); }
.hero { padding: var(--s-6) 0 var(--s-4); max-width: 46rem; }
h1 {
  font-family: var(--sans);
  font-weight: 750;
  font-size: clamp(var(--t-3), 6vw, var(--t-5));
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: var(--s-3);
}
.lede {
  font-size: var(--t-1);
  line-height: 1.55;
  border-left: 3px solid var(--blue);
  padding-left: var(--s-2);
}
.lede strong { color: var(--ink); font-weight: 600; }
.dim { color: var(--ink-dim); font-size: 0.85rem; }

/* ---- the engine ---- */
.engine { margin: var(--s-4) auto var(--s-6); max-width: 760px; }
.engine svg { width: 100%; height: auto; display: block; }
.engine figcaption {
  text-align: center;
  margin-top: var(--s-2);
  font-family: var(--code);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.organ { cursor: pointer; outline: none; }
.organ .halo {
  fill: rgba(42, 99, 168, 0.05);
  stroke: none;
  transition: fill 0.35s ease;
}
.organ .poly {
  fill: rgba(42, 99, 168, 0.06);
  stroke: rgba(106, 140, 211, 0.35);
  stroke-width: 0.8;
  transition: all 0.35s ease;
}
.organ .chord {
  fill: none;
  stroke: rgba(106, 140, 211, 0.18);
  stroke-width: 0.6;
}
.organ .star {
  fill: var(--ink);
  opacity: 0.85;
}
.organ .organ-label {
  font-family: var(--code);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  fill: var(--ink-dim);
  transition: fill 0.35s ease;
}
.organ.lit .halo, .organ:hover .halo, .organ:focus-visible .halo { fill: rgba(42, 99, 168, 0.16); }
.organ.lit .poly, .organ:hover .poly, .organ:focus-visible .poly {
  stroke: var(--blue-soft);
  fill: rgba(42, 99, 168, 0.14);
}
.organ.lit .organ-label, .organ:hover .organ-label, .organ:focus-visible .organ-label { fill: var(--ink); }
.organ:focus-visible .halo { stroke: var(--blue-soft); stroke-width: 1; stroke-dasharray: 3 3; }

.vein {
  fill: none;
  stroke: var(--blue-soft);
  stroke-width: 1.3;
  opacity: 0.38;
  stroke-dasharray: 2 7;
  transition: opacity 0.35s ease;
}
.feather {
  fill: none;
  stroke: rgba(106, 140, 211, 0.10);
  stroke-width: 0.9;
}
.sweep {
  fill: none;
  stroke: var(--blue-soft);
  stroke-width: 1.1;
  opacity: var(--wo, 0.12);
  stroke-linecap: round;
}
.spine-line {
  stroke: rgba(106, 140, 211, 0.14);
  stroke-width: 1;
  stroke-dasharray: 1 6;
}

/* ---- breathing: seeded per organ at BUILD time, constant forever ---- */
@keyframes ait-breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.025); }
}
@keyframes ait-twinkle {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 0.45; }
}
@keyframes ait-drift {
  to { stroke-dashoffset: -90; }
}
.organ {
  transform-box: fill-box;
  transform-origin: center;
  animation: ait-breathe var(--dur, 6s) ease-in-out infinite;
  animation-delay: var(--ph, 0s);
}
.organ .star { animation: ait-twinkle 4.5s ease-in-out infinite; animation-delay: var(--tw, 0s); }
.vein { animation: ait-drift var(--drift, 20s) linear infinite; }

@media (prefers-reduced-motion: reduce) {
  .organ, .organ .star, .vein { animation: none; }
}

/* ---- cards ---- */
.organs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--s-2);
  margin-bottom: var(--s-8);
}
.card {
  background: var(--panel);
  border: 1px solid var(--raise);
  padding: var(--s-3);
  transition: border-color 0.25s ease, background 0.25s ease;
}
.card.lit, .card:hover { border-color: var(--blue); background: var(--raise); }
.card h3 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: var(--t-1);
  color: var(--ink);
  margin-bottom: 4px;
}
.card .tells { font-size: 0.95rem; margin-bottom: var(--s-1); }
.card details summary {
  font-family: var(--code);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--blue-soft);
  cursor: pointer;
  list-style: none;
  padding: var(--s-1) 0 0;
}
.card details summary::before { content: "▸ "; }
.card details[open] summary::before { content: "▾ "; }
.card details ul {
  list-style: none;
  margin-top: var(--s-1);
  border-top: 1px solid var(--blue-faint);
  padding-top: var(--s-1);
}
.card details li {
  font-size: 0.88rem;
  color: var(--ink-mute);
  padding: 3px 0 3px 14px;
  position: relative;
}
.card details li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.85em;
  width: 5px; height: 5px;
  background: var(--blue-hi);
  clip-path: polygon(2px 0, 100% 0, 100% calc(100% - 2px), calc(100% - 2px) 100%, 0 100%, 0 2px);
}

/* ---- principles ---- */
.principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--s-2);
  border-top: 1px solid var(--raise);
  padding-top: var(--s-4);
}
.tile h3 {
  font-family: var(--code);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue-soft);
  margin-bottom: var(--s-1);
}
.tile p { font-size: 0.92rem; }

/* ---- footer ---- */
footer {
  border-top: 1px solid var(--raise);
  max-width: 1080px;
  margin: 0 auto;
  padding: var(--s-4) var(--s-3) var(--s-6);
}
footer a { color: var(--blue-soft); text-decoration-color: var(--blue); }
footer a:hover { color: var(--ink); }
footer p + p { margin-top: var(--s-1); }

@media (max-width: 560px) {
  .masthead { flex-direction: column; gap: 4px; }
  .hero { padding-top: var(--s-4); }
  .organ .organ-label { font-size: 13px; }
}