/* ============================================================================
   Clear Static Technologies — marketing site
   Warm-editorial system harmonized with the platform's "Warm Intelligence
   Console": warm bone canvas, warm near-black ink, a single jade "signal"
   accent. Display: Fraunces · Body: Hanken Grotesk · Labels: JetBrains Mono.
   ========================================================================== */

:root {
  --canvas:   #F6F4EE;  /* warm bone page */
  --surface:  #FFFFFF;
  --ink:      #1B1A16;  /* warm near-black */
  --ink-deep: #11100C;
  --muted:    #6B6357;
  --faint:    #97907F;
  --line:     #E7E3D8;  /* hairline */
  --line-2:   #DED9CC;

  --signal:        #0F7556;  /* jade — the accent */
  --signal-bright: #178A66;
  --signal-glow:   #6AC4A2;
  --signal-soft:   #EAF7F1;

  --dark:      #1B1A15;  /* dark section bg (echoes the dashboard sidebar) */
  --dark-2:    #14130F;
  --on-dark:   #ECE7DA;
  --on-dark-mut:#9A9381;

  --display: 'Fraunces', Georgia, serif;
  --sans: 'Hanken Grotesk', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;

  --maxw: 1140px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
::selection { background: var(--signal); color: #fff; }
a { color: inherit; text-decoration: none; }
em { font-style: italic; }
img, canvas, svg { display: block; max-width: 100%; }

/* Film-grain "static" overlay — the brand metaphor, kept whisper-quiet. */
.grain {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: .5; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
}

.wrap { width: min(100% - 48px, var(--maxw)); margin-inline: auto; position: relative; z-index: 2; }

/* ─────────────────────────── Eyebrow / labels ─────────────────────────── */
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 0 0 18px;
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before {
  content: ""; width: 22px; height: 1px; background: var(--signal); opacity: .6;
}

/* ─────────────────────────── Nav ─────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(24px, 5vw, 48px);
  background: color-mix(in srgb, var(--canvas) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.nav.scrolled { border-bottom-color: var(--line); }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark { width: 30px; height: 30px; }
.brand-mark line { stroke: var(--signal); stroke-width: 1.4; opacity: .55; }
.brand-mark circle.dim { fill: var(--signal); opacity: .55; }
.brand-mark circle.hot { fill: var(--signal); }
.brand-mark.sm { width: 24px; height: 24px; }
.brand-name {
  font-family: var(--display); font-weight: 600; font-size: 19px; letter-spacing: -.01em;
  line-height: 1; display: inline-flex; flex-direction: column;
}
.brand-sub {
  font-family: var(--mono); font-weight: 400; font-size: 9.5px;
  letter-spacing: .26em; text-transform: uppercase; color: var(--faint); margin-top: 3px;
}
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-size: 14.5px; color: var(--muted); transition: color .2s; }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  color: var(--ink) !important; border: 1px solid var(--line-2); border-radius: 999px;
  padding: 8px 18px; transition: border-color .2s, color .2s, background .2s;
}
.nav-cta:hover { border-color: var(--signal); color: var(--signal) !important; }

/* ─────────────────────────── Hero ─────────────────────────── */
.hero {
  position: relative;
  min-height: clamp(560px, 90vh, 880px);
  display: flex; align-items: center;
  padding: clamp(48px, 9vh, 120px) clamp(24px, 5vw, 48px) clamp(64px, 10vh, 120px);
  overflow: hidden;
}
#signal-field { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
/* The "clearing": static reads at the right edge, fades to clean bone under the
   text on the left — the message literally sits in cleared space. */
.hero-veil {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(120% 100% at 12% 50%, var(--canvas) 0%, var(--canvas) 30%, transparent 72%),
    linear-gradient(180deg, var(--canvas) 0%, transparent 16%, transparent 80%, var(--canvas) 100%);
}
.hero-inner { position: relative; z-index: 2; width: min(100%, var(--maxw)); margin-inline: auto; }
.hero h1 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(40px, 7vw, 84px);
  line-height: 1.02;
  letter-spacing: -.025em;
  margin: 0 0 26px;
  max-width: 15ch;
}
.hero h1 em { color: var(--signal); font-style: italic; }
.lede {
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.6; color: var(--muted);
  max-width: 46ch; margin: 0 0 34px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* ─────────────────────────── Buttons ─────────────────────────── */
.btn {
  font-family: var(--sans); font-weight: 600; font-size: 15px;
  padding: 13px 24px; border-radius: 999px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 9px;
  transition: transform .2s var(--ease), background .2s, color .2s, border-color .2s, box-shadow .2s;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--signal); color: #fff;
  box-shadow: 0 1px 0 rgba(0,0,0,.04), 0 12px 26px -14px var(--signal);
}
.btn-primary:hover { background: var(--signal-bright); transform: translateY(-2px); box-shadow: 0 18px 34px -16px var(--signal); }
.btn-ghost { color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { border-color: var(--signal); color: var(--signal); transform: translateY(-2px); }
.btn-lg { padding: 16px 30px; font-size: 16px; }
.dark .btn-ghost { color: var(--on-dark); border-color: rgba(236,231,218,.22); }

/* ─────────────────────────── Problem band ─────────────────────────── */
.band { padding: clamp(72px, 12vh, 150px) 0; border-top: 1px solid var(--line); }
.band-label { font-family: var(--mono); font-size: 12px; letter-spacing:.22em; text-transform:uppercase; color: var(--faint); margin: 0 0 26px; }
.band-statement {
  font-family: var(--display); font-weight: 400;
  font-size: clamp(26px, 4vw, 46px); line-height: 1.18; letter-spacing: -.02em;
  max-width: 22ch; margin: 0 0 28px;
}
.band-statement em { color: var(--signal); font-style: italic; }
.strike { position: relative; white-space: nowrap; color: var(--faint); }
.strike::after {
  content: ""; position: absolute; left: -2%; right: -2%; top: 54%; height: 2px;
  background: var(--signal); transform: scaleX(0); transform-origin: left;
  transition: transform .7s var(--ease);
}
.strike.lit::after { transform: scaleX(1); }
.band-note { font-size: 17px; color: var(--muted); max-width: 52ch; margin: 0; }

/* ─────────────────────────── Sections ─────────────────────────── */
.section { padding: clamp(72px, 12vh, 150px) 0; }
.section-head { max-width: 40ch; margin-bottom: clamp(40px, 6vh, 64px); }
.section-head h2 {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(28px, 4vw, 44px); line-height: 1.1; letter-spacing: -.022em; margin: 0;
}
.section-lede { color: var(--muted); font-size: 17px; margin: 22px 0 0; max-width: 56ch; }
.dark .section-lede { color: var(--on-dark-mut); }

/* Capability cards */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.card { background: var(--surface); padding: clamp(28px, 3.5vw, 44px); position: relative; transition: background .25s var(--ease); }
.card::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--signal); transform: scaleY(0); transform-origin: top; transition: transform .3s var(--ease); }
.card:hover { background: #FCFBF7; }
.card:hover::after { transform: scaleY(1); }
.card-no { font-family: var(--mono); font-size: 12px; color: var(--signal); letter-spacing: .1em; }
.card h3 { font-family: var(--display); font-weight: 600; font-size: clamp(20px, 2.4vw, 25px); line-height: 1.15; letter-spacing: -.01em; margin: 16px 0 10px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.card em { color: var(--ink); font-style: italic; }

/* ─────────────────────────── Dark approach section ─────────────────────────── */
.section.dark { background: var(--dark); color: var(--on-dark); position: relative; }
.section.dark::before {
  /* faint jade signal-glow bleeding up from the floor */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(80% 60% at 80% 120%, rgba(52,165,127,.16), transparent 60%);
}
.section.dark .eyebrow { color: var(--signal-glow); }
.section.dark .eyebrow::before { background: var(--signal-glow); }
.pillars { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 3vw, 44px); }
.pillars li { padding-top: 22px; border-top: 1px solid rgba(236,231,218,.16); }
.pillar-k { font-family: var(--display); font-weight: 600; font-size: clamp(18px, 2.2vw, 22px); color: var(--on-dark); display: block; margin-bottom: 10px; }
.pillars p { margin: 0; color: var(--on-dark-mut); font-size: 15.5px; line-height: 1.6; }

/* ─────────────────────────── Closing CTA ─────────────────────────── */
.contact { text-align: center; border-top: 1px solid var(--line); }
.cta-wrap { max-width: 720px; }
.cta-wrap .eyebrow { justify-content: center; }
.cta-head { font-family: var(--display); font-weight: 500; font-size: clamp(34px, 6vw, 64px); line-height: 1.04; letter-spacing: -.025em; margin: 0 0 22px; }
.cta-lede { color: var(--muted); font-size: clamp(16px, 2vw, 19px); margin: 0 auto 36px; max-width: 50ch; }

/* ─────────────────────────── Footer ─────────────────────────── */
.footer { border-top: 1px solid var(--line); padding: 48px 0 60px; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
.footer-brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--display); font-weight: 600; font-size: 16px; }
.footer-tag { font-family: var(--display); font-style: italic; color: var(--muted); margin: 0; font-size: 16px; }
.footer-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; font-size: 13px; }
.footer-meta a { color: var(--signal); }
.footer-meta a:hover { text-decoration: underline; }
.footer-year { font-family: var(--mono); color: var(--faint); font-size: 11.5px; letter-spacing: .04em; }

/* ─────────────────────────── Reveal on scroll / load ─────────────────────────── */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: calc(var(--d, 0) * 90ms); }
.reveal.in { opacity: 1; transform: none; }

/* ─────────────────────────── Responsive ─────────────────────────── */
@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
  .pillars { grid-template-columns: 1fr; gap: 0; }
  .pillars li { padding: 20px 0; }
  .hero-veil { background:
      radial-gradient(150% 80% at 50% 38%, var(--canvas) 0%, var(--canvas) 34%, transparent 80%),
      linear-gradient(180deg, transparent 60%, var(--canvas) 100%); }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .footer-meta { align-items: flex-start; }
  .hero h1 { max-width: 18ch; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover { transform: none; }
  .strike::after { transition: none; }
}