@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&display=swap');

:root{
  --bg-0: #070a10;
  --bg-1: #0b1018;
  --panel: rgba(255,255,255,0.035);
  --panel-border: rgba(255,255,255,0.09);
  --text-hi: #f2f5f9;
  --text-mid: #b7c1cd;
  --text-lo: #7c8794;
  --accent: #49e3d1;
  --accent-2: #5b8cff;
  --accent-3: #8b7cf6;
}

*{ box-sizing: border-box; }

html, body{
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: hidden;
  background: var(--bg-0);
}

body{
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-mid);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

h1, h2, h3, .logo{
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  color: var(--text-hi);
  margin: 0;
}

a{ text-decoration: none; color: inherit; }

/* ---------- background layers ---------- */
.bg-layer{
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 8%, rgba(91,140,255,0.14), transparent 60%),
    radial-gradient(ellipse 70% 50% at 85% 90%, rgba(139,124,246,0.10), transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 45%, var(--bg-0) 100%);
}

#bgCanvas{
  position: fixed;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  pointer-events: none;
  display: block;
}

/* ---------- nav ---------- */
.site-nav{
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 5vw;
  background: rgba(7,10,16,0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.logo{
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.logo span{
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-link{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid rgba(73,227,209,0.4);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-hi);
  background: rgba(73,227,209,0.06);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
}
.nav-link:hover{
  background: rgba(73,227,209,0.16);
  border-color: rgba(73,227,209,0.7);
  transform: translateY(-1px);
}
.nav-link:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- layout ---------- */
main{
  position: relative;
  z-index: 10;
}

.hero, .cards, .cta{
  position: relative;
  max-width: 1180px;
  margin: 0 auto;
  padding-left: 5vw;
  padding-right: 5vw;
}

/* ---------- hero ---------- */
.hero{
  padding-top: 13vh;
  padding-bottom: 9vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero .eyebrow{
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 22px;
  font-weight: 500;
}

.hero h1{
  font-size: clamp(2rem, 6vw, 5rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.01em;
  max-width: 16ch;
}

.hero h1 .grad{
  background: linear-gradient(100deg, var(--accent) 0%, var(--accent-2) 55%, var(--accent-3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p{
  margin-top: 26px;
  max-width: 680px;
  font-size: 1.08rem;
  color: var(--text-mid);
}

/* ---------- cards ---------- */
.cards{
  padding-top: 4vh;
  padding-bottom: 10vh;
}

.cards-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card{
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 38px 35px;
  transition: transform 0.28s ease, border-color 0.28s ease, background 0.28s ease;
}

.card:hover{
  transform: translateY(-6px);
  border-color: rgba(73,227,209,0.35);
  background: rgba(255,255,255,0.055);
}

.card .num{
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  display: block;
}

.card h3{
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-hi);
  margin-bottom: 12px;
}

.card p{
  font-size: 0.96rem;
  color: var(--text-mid);
  margin: 0;
}

/* ---------- CTA ---------- */
.cta{
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: 6vh;
  padding-bottom: 16vh;
}

.signal-status{
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 26px 0;
}

.signal-cta{
  display: inline-block;
  padding: 18px 46px;
  border-radius: 999px;
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  color: #061014;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  box-shadow: 0 10px 40px rgba(73,227,209,0.22);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.signal-cta:hover{
  transform: translateY(-3px);
  box-shadow: 0 14px 50px rgba(73,227,209,0.34);
}
.signal-cta:focus-visible{
  outline: 2px solid var(--text-hi);
  outline-offset: 4px;
}

.signal-sub{
  margin: 22px 0 0 0;
  font-size: 0.86rem;
  color: var(--text-lo);
}

/* ---------- footer ---------- */
/* Footer HTML is served via SSI (_footer.html) and rendered after <main>.
   It must stay above the fixed background/canvas layers and remain
   readable against the dark theme. */
footer{
  position: relative;
  z-index: 10;
  background: var(--bg-1);
  border-top: 1px solid var(--panel-border);
  padding-top: 24px;
  color: var(--text-mid);
}

footer div{
  color: inherit;
}

/* ---------- responsive ---------- */
@media (max-width: 480px){
  .site-nav{ padding: 14px 5vw; }
  .logo{ font-size: 1.05rem; }
  .nav-link{ padding: 8px 14px; font-size: 0.78rem; }
  .hero{ padding-top: 12vh; padding-bottom: 6vh; }
  .hero p{ font-size: 0.98rem; }
  .card{ padding: 30px 24px; }
  .signal-cta{ padding: 16px 32px; font-size: 0.96rem; width: 100%; }
  .cta{ padding-bottom: 12vh; }
}

@media (prefers-reduced-motion: reduce){
  *{
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}