:root {
  --bg-page: #020617;
  --bg-card: #020617;
  --text-main: #e7e9f0;
  --text-muted: #9ca3b0;
  --accent: #16a34a;
  --accent-soft: rgba(22, 163, 74, 0.18);
  --border-soft: #1f2937;
  --ring-soft: rgba(148, 163, 184, 0.25);
  --glow-soft: rgba(22, 163, 74, 0.28);
  --particle-base: rgba(74, 222, 128, 0.7);
  --particle-alt: rgba(56, 189, 248, 0.65);
  --hero-parallax: 0px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 2.5rem 1.25rem 3.5rem;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  line-height: 1.8;
  color: var(--text-main);
  background:
    radial-gradient(circle at top, #0b1120 0, #020617 55%, #000 100%),
    radial-gradient(circle at bottom, rgba(34, 197, 94, 0.06), transparent 60%);
}

main {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  padding: 2.6rem 2.4rem 2.9rem;
  background: radial-gradient(circle at top left, #020617 0, #020617 60%, #020617 100%);
  border-radius: 1.4rem;
  border: 1px solid var(--ring-soft);
  box-shadow:
    0 28px 70px rgba(15, 23, 42, 0.95),
    0 0 0 1px rgba(15, 23, 42, 0.9);
  overflow: visible;
}

.hero {
  position: relative;
  z-index: 0;
  margin: 0 calc(-2.4rem - 1em) 2.4rem;
  padding: 2.6rem calc(2.4rem + 1em) 2.6rem;
  border-radius: 1.4rem;
  border: 1px solid var(--ring-soft);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at center, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.25) 55%, transparent 85%),
    linear-gradient(to bottom, rgba(10, 46, 38, 0.85), rgba(10, 46, 38, 0.98)),
    url("hero-dragon-neural.png") center top / cover no-repeat;
  z-index: -1;
}

.hero > * {
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.hero > .hero-body {
  max-width: 34rem;
  margin-top: 1.6rem;
  text-align: left;
}

main::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(
    135deg,
    rgba(22, 163, 74, 0.4),
    rgba(52, 211, 153, 0.14),
    transparent 55%
  );
  opacity: 0.45;
  pointer-events: none;
}

main::after {
  content: "";
  position: absolute;
  top: -6rem;
  right: -4rem;
  width: 14rem;
  height: 14rem;
  background: radial-gradient(circle, rgba(22, 163, 74, 0.25), transparent 60%);
  filter: blur(4px);
  opacity: 0.6;
  pointer-events: none;
}

@media (max-width: 640px) {
  body {
    padding: 1.75rem 0.9rem 2.4rem;
  }

  main {
    padding: 1.8rem 1.45rem 2.2rem;
    border-radius: 1rem;
  }

  .hero {
    margin: 0 calc(-1.45rem - 1em) 2rem;
    padding: 2.2rem calc(1.45rem + 1em) 2.4rem;
  }
}

h1,
h2,
h3 {
  font-weight: 650;
  color: #f9fafb;
  letter-spacing: 0.01em;
}

h1 {
  font-size: 2.4rem;
  line-height: 1.1;
  margin: 0.2rem 0 0.9rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  margin-bottom: 2.1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

.site-logo {
  font-size: 0.95rem;
  font-weight: 550;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: none;
}

.site-logo:hover {
  border-bottom: none;
}

.site-nav {
  display: flex;
  gap: 1.1rem;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.site-nav a {
  color: var(--text-muted);
  border-bottom: none;
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 0;
  height: 1px;
  background: var(--accent);
  opacity: 0.8;
  transition: width 0.16s ease-out;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  width: 100%;
}

.site-nav a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .site-nav {
    flex-wrap: wrap;
    row-gap: 0.4rem;
  }

  .site-nav .nav-secondary {
    display: none;
  }
}

h2 {
  font-size: 1.45rem;
  margin: 2.6rem 0 1rem;
}

h3 {
  font-size: 1.1rem;
  margin: 1.8rem 0 0.8rem;
}

.hero-tagline {
  font-size: 1.15rem;
  line-height: 1.35;
  max-width: 32rem;
  margin: 0.2rem auto 1.6rem;
  text-align: center;
}

p {
  margin: 0 0 1.05rem;
}

ul {
  margin: 0.4rem 0 1.15rem 1.3rem;
  padding: 0;
}

li {
  margin: 0.2rem 0 0.3rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 197, 94, 0.4);
}

a:hover {
  border-bottom-color: var(--accent);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-bottom-color: var(--accent);
}

hr {
  border: none;
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  margin: 2.1rem 0 1.4rem;
  opacity: 0.9;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
}

/* Page-specific tweaks */

h1 + h3,
h1 + h2 {
  margin-top: 0.25rem;
  color: var(--accent);
  font-weight: 500;
}

main > h1,
main > h1 + h3,
main > p:first-of-type {
  text-align: center;
}

main > p:nth-of-type(2) {
  max-width: 46rem;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

em {
  color: var(--text-muted);
}

strong {
  font-weight: 600;
}

blockquote {
  margin: 1.2rem 0;
  padding: 0.9rem 1rem;
  border-left: 3px solid var(--accent);
  background: rgba(15, 23, 42, 0.85);
  border-radius: 0.5rem;
  color: var(--text-main);
}

section,
.section {
  margin-bottom: 1.6rem;
  padding: 0.75rem 0.25rem;
}

.section-tagline {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.muted {
  color: var(--text-muted);
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  background: var(--accent-soft);
  color: var(--accent);
}

.hero-cta {
  margin-top: 1.4rem;
  margin-bottom: 1.6rem;
  text-align: center;
}

.boundary-note {
  margin: 1.1rem 0 0.8rem;
  padding: 0.9rem 1rem;
  border-radius: 0.8rem;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.9));
  color: var(--text-muted);
}

.concept-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.5rem;
  margin: 0.05rem 0.15rem 0.05rem 0;
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #bbf7d0;
  white-space: nowrap;
}

/* Primary call-to-action link (interest list) */

.cta-primary,
p strong a.cta-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.2rem;
  border-radius: 999px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.32), rgba(34, 197, 94, 0.14));
  color: #ecfdf5;
  border: 1px solid rgba(34, 197, 94, 0.7);
  border-bottom: none;
  box-shadow:
    0 0 0 1px rgba(15, 23, 42, 0.9),
    0 10px 22px var(--glow-soft);
}

.cta-primary:hover,
p strong a.cta-primary:hover {
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.4), rgba(34, 197, 94, 0.2));
  transform: translateY(-1px);
}

/* Ambient “virtual particle” background in void margins */

.particle-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--particle-base), rgba(190, 242, 100, 0));
  opacity: 0;
  animation: particle-fade 1.4s ease-out forwards;
}

.particle--alt {
  background: radial-gradient(circle, var(--particle-alt), rgba(94, 234, 212, 0));
}

@keyframes particle-fade {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  20% {
    opacity: 0.7;
    transform: scale(0.9);
  }
  80% {
    opacity: 0.4;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.1);
  }
}

/* Awareness thread in left void margin */

.awareness-thread {
  position: fixed;
  width: 2px;
  height: 0;
  border-radius: 999px;
  background: linear-gradient(
    to bottom,
    rgba(52, 211, 153, 0.0),
    rgba(52, 211, 153, 0.35),
    rgba(52, 211, 153, 0.9)
  );
  box-shadow: 0 0 14px rgba(52, 211, 153, 0.55);
  opacity: 0;
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.3s ease-out;
}

.awareness-thread::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(
    to right,
    rgba(52, 211, 153, 0.9),
    rgba(52, 211, 153, 0.0)
  );
  box-shadow: 0 0 10px rgba(52, 211, 153, 0.45);
  transform-origin: left center;
  transform: translateX(3px) rotate(11deg);
}

@media (prefers-reduced-motion: reduce) {
  .particle-layer,
  .particle,
  .awareness-thread {
    display: none !important;
    animation: none !important;
  }
  .hero::before {
    transform: none !important;
  }
}