:root {
  --bg-1: #0b1422;
  --bg-2: #13253d;
  --ink: #e8f3ff;
  --muted: #9eb5d3;
  --accent: #4be2b2;
  --accent-2: #59b9ff;
  --line: rgba(132, 167, 218, 0.24);
  --panel: rgba(13, 24, 41, 0.72);
  --shadow: 0 18px 50px rgba(2, 10, 22, 0.45);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Manrope", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1000px 760px at 94% -8%, rgba(89, 185, 255, 0.18), transparent 56%),
    radial-gradient(900px 700px at -5% 110%, rgba(75, 226, 178, 0.16), transparent 50%),
    linear-gradient(150deg, var(--bg-1), var(--bg-2));
  overflow-x: hidden;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, 0.04) 0.65px, transparent 0.65px);
  background-size: 3px 3px;
  opacity: 0.2;
  z-index: -1;
}

.page-shell {
  width: min(1160px, 92vw);
  margin-inline: auto;
}

.site-header {
  margin-top: 1.3rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}

.brand {
  text-decoration: none;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.brand span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(10, 20, 35, 0.66);
}

.nav-link {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.48rem 0.85rem;
  transition: background 170ms ease, color 170ms ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--ink);
  background: rgba(75, 226, 178, 0.2);
}

.ghost-btn {
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.62rem 1rem;
  transition: border-color 170ms ease, transform 170ms ease;
}

.ghost-btn:hover {
  border-color: rgba(75, 226, 178, 0.64);
  transform: translateY(-2px);
}

main {
  margin-top: 2.2rem;
  margin-bottom: 4rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1.4rem;
  align-items: start;
}

.page-hero {
  max-width: 820px;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-2);
  font-size: 0.78rem;
}

h1,
h2,
h3 {
  font-family: "Space Grotesk", sans-serif;
}

.hero h1,
.page-hero h1 {
  margin: 0.8rem 0 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.05;
}

.lead {
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.72;
}

.cta-row {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.sponsor-note {
  margin-top: 0.95rem;
  color: var(--muted);
}

.sponsor-note a {
  color: var(--accent);
  text-decoration: none;
}

.primary-btn,
.secondary-btn {
  text-decoration: none;
  font-weight: 700;
  border-radius: 12px;
  padding: 0.86rem 1.2rem;
  transition: transform 170ms ease;
}

.primary-btn {
  color: #08221a;
  background: linear-gradient(120deg, var(--accent), #8ff4d8);
  box-shadow: 0 8px 26px rgba(75, 226, 178, 0.34);
}

.secondary-btn {
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(20, 36, 60, 0.66);
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-2px);
}

.hero-card,
.feature-card,
.page-card,
.faq-list details,
.diagram-block {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 1.05rem;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--muted);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(75, 226, 178, 0.6);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(75, 226, 178, 0.6);
  }
  70% {
    box-shadow: 0 0 0 12px rgba(75, 226, 178, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(75, 226, 178, 0);
  }
}

.check-list,
.plain-list {
  margin: 0.9rem 0 0;
  padding-left: 1.1rem;
}

.check-list li,
.plain-list li {
  color: #c9dcf8;
  margin-bottom: 0.45rem;
  line-height: 1.5;
}

.section {
  margin-top: 2.8rem;
}

.section-head h2 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
}

.feature-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
}

.feature-grid.two-col {
  grid-template-columns: repeat(2, 1fr);
}

.feature-card {
  padding: 1rem;
}

.feature-card h3 {
  margin: 0;
  font-size: 1.08rem;
}

.feature-card p {
  margin: 0.6rem 0 0;
  color: var(--muted);
  line-height: 1.63;
}

.diagram-block {
  margin-top: 1.1rem;
  padding: 1rem;
}

.diagram-block h3 {
  margin: 0 0 0.8rem;
}

.diagram-track {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.diagram-track.stacked {
  gap: 0.8rem;
}

.diagram-node {
  flex: 1 1 200px;
  min-height: 88px;
  border-radius: 12px;
  border: 1px solid rgba(132, 167, 218, 0.26);
  background: rgba(8, 15, 29, 0.84);
  display: grid;
  place-items: center;
  text-align: center;
  padding: 0.85rem;
}

.diagram-node strong {
  font-size: 1.1rem;
  color: var(--accent);
  display: block;
}

.diagram-node span {
  color: #c3d8f7;
  font-size: 0.9rem;
  margin-top: 0.18rem;
}

.diagram-arrow {
  color: #86eccc;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.page-cards {
  margin-top: 1rem;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(3, 1fr);
}

.page-card {
  text-decoration: none;
  color: var(--ink);
  padding: 1rem;
  transition: transform 170ms ease, border-color 170ms ease;
}

.page-card:hover {
  transform: translateY(-4px);
  border-color: rgba(75, 226, 178, 0.52);
}

.page-card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.page-card p {
  margin: 0.45rem 0 0;
  color: var(--muted);
}

.faq-list {
  display: grid;
  gap: 0.75rem;
}

.faq-list details {
  padding: 0.9rem 1rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  color: #dff0ff;
}

.faq-list p {
  margin: 0.7rem 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.faq-list code {
  color: #acf0d7;
}

.site-footer {
  margin-bottom: 1.4rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(8, 16, 31, 0.7);
  padding: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: rise 650ms ease forwards;
}

.delay-1 {
  animation-delay: 140ms;
}

.delay-2 {
  animation-delay: 260ms;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero,
  .feature-grid,
  .page-cards,
  .feature-grid.two-col {
    grid-template-columns: 1fr;
  }

  .diagram-track {
    flex-direction: column;
    align-items: stretch;
  }

  .diagram-arrow {
    text-align: center;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}