:root {
  /* Acumino palette */
  --bg: hsl(220 20% 4%);
  --bg-elev: hsl(220 18% 8%);
  --fg: hsl(180 10% 92%);
  --fg-muted: hsl(220 10% 55%);
  --border: hsl(220 15% 16%);
  --primary: hsl(180 100% 50%);   /* cyan */
  --primary-soft: hsl(180 80% 40%);
  --primary-ink: hsl(220 20% 4%);
  --glow-cyan: 0 0 40px hsl(180 100% 50% / 0.18);
  --glow-cyan-strong: 0 0 80px hsl(180 100% 50% / 0.28);

  --radius: 14px;
  --max: 880px;
  --font-sans: "Poppins", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid hsl(180 100% 50% / 0.35);
  transition: border-color 160ms ease, color 160ms ease,
    text-shadow 160ms ease;
}

a:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
  text-shadow: 0 0 12px hsl(180 100% 50% / 0.5);
}

.shell {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 28px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--fg);
}

.brand .mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  filter: drop-shadow(0 0 8px hsl(180 100% 50% / 0.5));
}

.brand .wordmark {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0;
}

.hero-image {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--glow-cyan-strong),
    0 30px 80px -20px hsl(0 0% 0% / 0.6);
}

.hero-image::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    transparent 55%,
    hsl(220 20% 4% / 0.55) 100%
  );
}

.hero-image img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hero-image figcaption {
  position: absolute;
  left: 18px;
  bottom: 14px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
  text-shadow: 0 0 12px hsl(180 100% 50% / 0.5);
}

.hero {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 8px 0;
}

.eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary-soft);
}

h1 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(40px, 6vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 a {
  border-bottom-width: 2px;
}

h1 .acumino-link {
  display: inline-flex;
  align-items: center;
  vertical-align: -0.06em;
  border-bottom: none;
  margin-left: 0.18em;
  transition: filter 200ms ease, transform 200ms ease;
  filter: drop-shadow(0 0 16px hsl(180 100% 50% / 0.35));
}

h1 .acumino-link:hover {
  filter: drop-shadow(0 0 24px hsl(180 100% 50% / 0.6));
  transform: translateY(-1px);
}

h1 .acumino-logo {
  display: block;
  height: 0.864em;
  width: auto;
}

.lede {
  margin: 0;
  max-width: 60ch;
  font-size: 18px;
  line-height: 1.65;
  color: hsl(180 10% 92% / 0.82);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.cta a {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  border-radius: 999px;
  border-bottom: none;
  font-size: 15px;
  letter-spacing: 0.02em;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease,
    border-color 160ms ease, box-shadow 160ms ease;
}

.cta .primary {
  background: var(--primary);
  color: var(--primary-ink);
  border: 1px solid var(--primary);
  box-shadow: var(--glow-cyan);
}

.cta .primary:hover {
  transform: translateY(-1px);
  background: hsl(180 100% 60%);
  border-color: hsl(180 100% 60%);
  color: var(--primary-ink);
  box-shadow: var(--glow-cyan-strong);
  text-shadow: none;
}

.cta .ghost {
  border: 1px solid var(--border);
  color: var(--fg);
  background: hsl(220 18% 8% / 0.6);
}

.cta .ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--glow-cyan);
  text-shadow: 0 0 12px hsl(180 100% 50% / 0.5);
}

.foot {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--fg-muted);
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.foot .dot {
  opacity: 0.6;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(
      900px 600px at 80% -10%,
      hsl(180 100% 50% / 0.10),
      transparent 60%
    ),
    radial-gradient(
      700px 500px at -10% 110%,
      hsl(180 100% 50% / 0.06),
      transparent 60%
    ),
    linear-gradient(180deg, hsl(220 20% 4%) 0%, hsl(220 18% 7%) 100%);
}

@media (max-width: 520px) {
  .shell {
    padding: 32px 18px 24px;
    gap: 28px;
  }
  .lede {
    font-size: 17px;
  }
  .hero-image figcaption {
    font-size: 11px;
    left: 14px;
    bottom: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}