:root {
  --graphite: #0b0d12;
  --graphite-soft: #141924;
  --line: rgba(110, 253, 179, 0.18);
  --green: #6efdba;
  --green-soft: #45cfa0;
  --text: #f1f5f4;
  --muted: #b2c5bd;
  --accent: #0f2c24;
  font-family: 'Space Grotesk', system-ui, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body.dark-grid {
  min-height: 100vh;
  background: var(--graphite);
  color: var(--text);
  overflow-x: hidden;
}

.dark-grid::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(111, 253, 186, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(111, 253, 186, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

#bgParticles {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.5;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 60px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px 20px;
  background: rgba(20, 25, 36, 0.9);
  backdrop-filter: blur(6px);
}

.brand {
  display: flex;
  align-items: center;
}


.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--green-soft);
}

h1 {
  margin-top: 4px;
  font-size: 1.5rem;
  letter-spacing: 0.1em;
}

.cta-link {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 16px;
  text-decoration: none;
  color: var(--green);
  font-weight: 600;
}

.hero {
  margin-top: 48px;
}

.kicker {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--green-soft);
  text-transform: uppercase;
}

.hero h2 {
  margin: 12px 0;
  font-size: clamp(2rem, 5vw, 3.4rem);
}

.lead {
  color: var(--muted);
  max-width: 100%;
  line-height: 1.6;
  text-align: justify;
}

.ca-card {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 16px;
  background: rgba(111, 253, 186, 0.08);
}

.ca-card span {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--green-soft);
}

.panel {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  margin-top: 32px;
  background: rgba(20, 27, 37, 0.9);
  position: relative;
  overflow: hidden;
}

.panel > * {
  position: relative;
}

.panel p {
  text-align: justify;
}

.section-video-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(111, 253, 186, 0.08), transparent 60%);
  opacity: 0.3;
}

.reliability h3 {
  font-size: 1.6rem;
  margin-bottom: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.reliability .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.reliability article {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  background: rgba(15, 21, 28, 0.9);
}

.reliability h4 {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.reliability p {
  color: var(--muted);
  line-height: 1.5;
}

.tunnel {
  margin-top: 32px;
}

.tunnel h3 {
  font-size: 1.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}





.tunnel-animation {
  position: relative;
  height: 240px;
  background: radial-gradient(circle, rgba(111, 253, 186, 0.08), transparent 80%);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 18px;
}

.ring {
  position: absolute;
  border: 1px solid rgba(111, 253, 186, 0.4);
  border-radius: 50%;
  animation: ringPulse 6s linear infinite;
}

.ring-1 { inset: 30px; }
.ring-2 { inset: 10px; animation-delay: -2s; }
.ring-3 { inset: 50px; animation-delay: -4s; }

.pulse {
  position: absolute;
  top: 50%;
  left: -20%;
  width: 160px;
  height: 3px;
  background: linear-gradient(90deg, rgba(111, 253, 186, 0), rgba(111, 253, 186, 0.9), rgba(111, 253, 186, 0));
  animation: pulseMove 2.5s linear infinite;
}



.chip-link {
  align-self: flex-start;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 18px;
  text-decoration: none;
  color: var(--green);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

.flow h3 {
  margin-bottom: 16px;
  font-size: 1.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.flow-grid article {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: rgba(15, 21, 30, 0.9);
  position: relative;
  overflow: hidden;
}

.flow-grid article::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(111,253,186,0.05), rgba(111,253,186,0));
  animation: flowSweep 6s linear infinite;
}

.flow-grid article:nth-child(2)::after { animation-delay: -2s; }
.flow-grid article:nth-child(3)::after { animation-delay: -4s; }

.flow-grid article > * {
  position: relative;
  z-index: 1;
}

.flow-grid span {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--green-soft);
}

.flow-grid h4 {
  margin: 6px 0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.flow-grid p {
  color: var(--muted);
}

.cta-panel {
  text-align: center;
}

.cta-panel h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.cta-panel p {
  color: var(--muted);
  margin-bottom: 16px;
}

footer {
  margin-top: 32px;
  text-align: center;
  color: var(--muted);
}

@keyframes ringPulse {
  0% { transform: scale(0.8); opacity: 0.2; }
  50% { opacity: 0.6; }
  100% { transform: scale(1.2); opacity: 0.1; }
}

@keyframes pulseMove {
  0% { transform: translate(-10%, -50%); }
  100% { transform: translate(130%, -50%); }
}

@media (max-width: 600px) {
  header {
    flex-direction: column;
    gap: 12px;
  }
  .cta-link {
    width: 100%;
    text-align: center;
  }
}


@keyframes flowSweep {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.circuit-steps {
  list-style: none;
  margin-top: 12px;
  color: var(--muted);
}

.circuit-steps li {
  margin-bottom: 6px;
  text-align: justify;
}

.circuit-steps strong {
  color: var(--green-soft);
  margin-right: 6px;
}

.node {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  animation: nodeTravel 4s linear infinite;
}

.node-1 { top: 40%; left: 10%; }
.node-2 { top: 55%; left: 45%; animation-delay: -1.3s; }
.node-3 { top: 50%; right: 12%; animation-delay: -2.6s; }

@keyframes nodeTravel {
  0% { transform: scale(0.8); opacity: 0.2; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.8); opacity: 0.2; }
}

.circuit-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.circuit-cards article {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: rgba(15, 21, 30, 0.9);
}

.circuit-cards h4 { text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; }
.circuit-cards p { color: var(--muted); }

.brand-mark {
  width: 48px;
  height: 48px;
  object-fit: contain;
  margin-right: 12px;
}