/* ─────────────────────────────────────────────────────────────
   Double R Technologies — shared styles
   Sharp futuristic display + clean techy sans on near-black
   ───────────────────────────────────────────────────────────── */

:root {
  /* surfaces */
  --bg-0: #05060a;
  --bg-1: #0a0d14;
  --bg-2: #11151f;
  --bg-3: #181d2b;
  --line: rgba(140, 160, 200, 0.12);
  --line-strong: rgba(140, 160, 200, 0.22);

  /* text */
  --text: #eaf0fb;
  --text-dim: #8d96aa;
  --text-mute: #5a6072;

  /* accents (cyan / blue / purple) */
  --c-cyan: #00e5ff;
  --c-blue: #5b7bff;
  --c-purple: #a855f7;
  --c-accent: var(--c-cyan);

  /* glow intensity (driven by Tweaks) */
  --glow: 1;

  /* type */
  --display: "Orbitron", "Michroma", system-ui, sans-serif;
  --sans: "Space Grotesk", "Sora", system-ui, sans-serif;
  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;

  /* radii */
  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 28px;

  /* container */
  --maxw: 1280px;
  --pad-x: clamp(20px, 4vw, 56px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg-0);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  min-height: 100vh;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

/* ─── BACKGROUND LAYERS ─────────────────────────────────────── */

.bg-stack {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none; overflow: hidden;
}
/* grid layer */
.bg-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(rgba(120,160,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,160,255,0.045) 1px, transparent 1px);
  background-size: 56px 56px, 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 50%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 50%, transparent 100%);
}
/* soft animated smoke blobs */
.bg-smoke {
  position: absolute; inset: 0;
  filter: blur(80px) saturate(120%);
  opacity: calc(0.55 * var(--glow));
}
.bg-smoke .blob {
  position: absolute; border-radius: 50%;
  mix-blend-mode: screen;
  animation: drift 28s ease-in-out infinite alternate;
}
.bg-smoke .blob.b1 {
  width: 60vmin; height: 60vmin; top: -10%; left: -10%;
  background: radial-gradient(circle, rgba(0,229,255,0.35), transparent 60%);
}
.bg-smoke .blob.b2 {
  width: 70vmin; height: 70vmin; top: 30%; right: -15%;
  background: radial-gradient(circle, rgba(168,85,247,0.32), transparent 60%);
  animation-duration: 36s;
}
.bg-smoke .blob.b3 {
  width: 50vmin; height: 50vmin; bottom: -10%; left: 30%;
  background: radial-gradient(circle, rgba(91,123,255,0.30), transparent 60%);
  animation-duration: 44s;
}
@keyframes drift {
  0%   { transform: translate3d(0,0,0)     scale(1);    }
  50%  { transform: translate3d(6vw,-4vh,0) scale(1.15); }
  100% { transform: translate3d(-4vw,5vh,0) scale(0.95); }
}
/* canvas particle layer */
#bgCanvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: calc(0.95 * var(--glow));
}
/* page content sits above */
main, header.site, footer.site { position: relative; z-index: 2; }

/* ─── HEADER / NAV ─────────────────────────────────────────── */

header.site {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: linear-gradient(to bottom, rgba(5,6,10,0.85), rgba(5,6,10,0.55));
  border-bottom: 1px solid var(--line);
}
.nav {
  max-width: var(--maxw); margin: 0 auto;
  padding: 14px var(--pad-x);
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--display); font-weight: 800; letter-spacing: 0.04em;
  font-size: 14px;
}
.brand .logo { width: 38px; height: 38px; }
.brand .name {
  display: flex; flex-direction: column; line-height: 1;
}
.brand .name .l1 { color: var(--text); }
.brand .name .l2 {
  font-family: var(--mono); font-weight: 500;
  font-size: 9px; letter-spacing: 0.32em;
  color: var(--c-cyan); margin-top: 4px;
  text-shadow: 0 0 calc(8px * var(--glow)) rgba(0,229,255,0.6);
}
.nav-links {
  display: flex; gap: 4px; align-items: center;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase;
}
.nav-links a {
  padding: 10px 14px; border-radius: var(--r-sm);
  color: var(--text-dim); transition: color .2s, background .2s;
  position: relative;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px;
  height: 1px; background: var(--c-cyan);
  box-shadow: 0 0 calc(8px * var(--glow)) var(--c-cyan);
}
.nav-cta {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.2em;
  text-transform: uppercase;
}
.menu-btn {
  display: none; background: none; border: 1px solid var(--line-strong);
  color: var(--text); padding: 8px 12px; border-radius: var(--r-sm); cursor: pointer;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em;
}
@media (max-width: 820px) {
  .nav-links { display: none; }
  .menu-btn { display: block; }
  .nav-cta.desktop { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg-1); border-bottom: 1px solid var(--line);
    padding: 12px var(--pad-x);
  }
  .nav-links.open a {
    padding: 14px 0; width: 100%; border-radius: 0;
    border-bottom: 1px solid var(--line);
  }
  .nav-links.open a:last-child { border-bottom: none; }
}

/* ─── BUTTONS ──────────────────────────────────────────────── */

.btn {
  --bw: 1px;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  font-family: var(--mono); font-size: 12px; font-weight: 600;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--text); cursor: pointer;
  border: var(--bw) solid transparent;
  background: transparent;
  border-radius: 999px;
  position: relative; isolation: isolate;
  transition: transform .2s ease, color .2s, background .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  color: #001016;
  background:
    linear-gradient(135deg, #b9f5ff 0%, #00e5ff 50%, #5b7bff 100%);
  box-shadow:
    0 0 calc(20px * var(--glow)) rgba(0,229,255,0.45),
    0 0 calc(60px * var(--glow)) rgba(91,123,255,0.25),
    inset 0 0 0 1px rgba(255,255,255,0.5);
}
.btn-primary:hover {
  box-shadow:
    0 0 calc(28px * var(--glow)) rgba(0,229,255,0.6),
    0 0 calc(80px * var(--glow)) rgba(168,85,247,0.35),
    inset 0 0 0 1px rgba(255,255,255,0.7);
}
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--c-cyan);
  background: rgba(0,229,255,0.06);
  box-shadow: 0 0 calc(16px * var(--glow)) rgba(0,229,255,0.25);
}

.btn .arr {
  display: inline-block; width: 14px; height: 10px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 10'><path d='M0 5h12M8 1l4 4-4 4' stroke='black' stroke-width='1.6' fill='none' stroke-linecap='square'/></svg>") center/contain no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 10'><path d='M0 5h12M8 1l4 4-4 4' stroke='black' stroke-width='1.6' fill='none' stroke-linecap='square'/></svg>") center/contain no-repeat;
  transition: transform .2s;
}
.btn:hover .arr { transform: translateX(3px); }

/* ─── LAYOUT PRIMITIVES ────────────────────────────────────── */

.section {
  padding: clamp(72px, 10vw, 140px) var(--pad-x);
  max-width: var(--maxw); margin: 0 auto;
}
.section-tight {
  padding: clamp(56px, 7vw, 96px) var(--pad-x);
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--c-cyan);
  text-shadow: 0 0 calc(8px * var(--glow)) rgba(0,229,255,0.5);
}
.eyebrow::before {
  content: ""; width: 28px; height: 1px; background: var(--c-cyan);
  box-shadow: 0 0 calc(6px * var(--glow)) var(--c-cyan);
}

h1, h2, h3, h4 {
  font-family: var(--display); font-weight: 800;
  letter-spacing: -0.01em; margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(40px, 6.6vw, 88px); line-height: 0.98; letter-spacing: -0.02em; }
h2 { font-size: clamp(30px, 4.4vw, 56px); line-height: 1.04; }
h3 { font-size: clamp(20px, 2vw, 26px); line-height: 1.15; letter-spacing: 0; }
h4 { font-size: 16px; letter-spacing: 0.04em; }

.lead {
  font-size: clamp(16px, 1.4vw, 19px);
  color: var(--text-dim); line-height: 1.6;
  text-wrap: pretty; max-width: 60ch;
}

/* gradient text helper */
.glow-text {
  background: linear-gradient(135deg, #ffffff 0%, #b9f5ff 35%, #00e5ff 70%, #5b7bff 100%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 calc(16px * var(--glow)) rgba(0,229,255,0.35));
}

/* ─── CARDS ────────────────────────────────────────────────── */

.card {
  position: relative;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.005)),
    var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 26px;
  transition: border-color .25s, transform .25s, background .25s;
  overflow: hidden;
}
.card::before {
  /* glow ring on hover */
  content: ""; position: absolute; inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(from 180deg, transparent 0deg, var(--c-cyan) 60deg, var(--c-purple) 180deg, transparent 240deg, transparent 360deg);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .3s;
  pointer-events: none;
}
.card:hover { transform: translateY(-3px); border-color: var(--line-strong); }
.card:hover::before { opacity: calc(0.85 * var(--glow)); }

/* ─── FOOTER ───────────────────────────────────────────────── */

footer.site {
  margin-top: 120px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.5));
}
.footer-grid {
  max-width: var(--maxw); margin: 0 auto;
  padding: 64px var(--pad-x) 32px;
  display: grid; gap: 48px;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
}
.footer-grid h4 {
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  color: var(--c-cyan); letter-spacing: 0.28em; text-transform: uppercase;
  margin-bottom: 18px;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; color: var(--text-dim); font-size: 14px; }
.footer-grid ul a:hover { color: var(--text); }
.footer-bottom {
  max-width: var(--maxw); margin: 0 auto;
  padding: 20px var(--pad-x) 32px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  color: var(--text-mute); font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
}
@media (max-width: 820px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}

/* ─── UTILITY ──────────────────────────────────────────────── */

/* gated on html.js — no JS, no hiding (no flash of nothing for non-JS users) */
html.js .fadein { opacity: 0; transform: translateY(16px); transition: opacity .8s ease, transform .8s ease; }
html.js .fadein.in { opacity: 1; transform: none; }
/* hero blocks above the fold render immediately (matches both .hero and inner .fadein) */
html.js .hero.fadein,
html.js .page-hero.fadein,
html.js .hero .fadein,
html.js .page-hero .fadein { opacity: 1; transform: none; transition: none; }

.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--line-strong), transparent);
  margin: 0 var(--pad-x);
  max-width: var(--maxw);
}

/* keyboard focus */
:focus-visible { outline: 2px solid var(--c-cyan); outline-offset: 3px; border-radius: 4px; }

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}