body {
  position: relative;
  isolation: isolate;
  --network-bg-start: #fafcff;
  --network-bg-mid: #f3f8fc;
  --network-bg-end: #f7f4ee;
  --network-glow-a: rgba(34, 211, 238, 0.12);
  --network-glow-b: rgba(0, 33, 71, 0.08);
  --network-wire: rgba(0, 33, 71, 0.16);
  --network-wire-soft: rgba(0, 33, 71, 0.08);
  --network-node: #1e87b4;
  --network-node-ring: rgba(34, 211, 238, 0.22);
  --network-signal: rgba(34, 211, 238, 0.96);
  --network-signal-glow: rgba(34, 211, 238, 0.34);
  --network-noise-opacity: 0.012;
}

body[data-network-theme="warm"] {
  --network-bg-start: #fbf8f4;
  --network-bg-mid: #f7f1e8;
  --network-bg-end: #fbf8f3;
  --network-glow-a: rgba(211, 97, 45, 0.11);
  --network-glow-b: rgba(68, 43, 26, 0.08);
  --network-wire: rgba(92, 61, 39, 0.16);
  --network-wire-soft: rgba(92, 61, 39, 0.08);
  --network-node: #d3612d;
  --network-node-ring: rgba(211, 97, 45, 0.2);
  --network-signal: rgba(255, 183, 110, 0.96);
  --network-signal-glow: rgba(211, 97, 45, 0.28);
}

.network-theme,
.network-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.network-theme {
  z-index: -2;
  overflow: hidden;
  background:
    radial-gradient(circle at 14% 14%, var(--network-glow-a) 0%, transparent 24%),
    radial-gradient(circle at 82% 18%, var(--network-glow-b) 0%, transparent 28%),
    linear-gradient(180deg, var(--network-bg-start) 0%, var(--network-bg-mid) 52%, var(--network-bg-end) 100%);
}

.network-theme::before {
  content: "";
  position: absolute;
  inset: -8%;
  background:
    radial-gradient(circle at 52% 48%, rgba(255, 255, 255, 0.8) 0%, transparent 48%),
    linear-gradient(140deg, transparent 0 43%, rgba(255, 255, 255, 0.24) 49%, transparent 55%);
  filter: blur(36px);
  opacity: 0.82;
  animation: network-sheen 26s ease-in-out infinite alternate;
}

.network-theme::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.01) 28%, rgba(0, 0, 0, 0.02) 100%);
}

.network-noise {
  z-index: -1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 128px 128px;
  opacity: var(--network-noise-opacity);
}

.network-system {
  position: absolute;
  opacity: 0.62;
  transform-origin: center;
  animation: network-breathe 20s ease-in-out infinite;
}

.network-system::before {
  content: "";
  position: absolute;
  inset: 18% 16%;
  border-radius: 999px;
  background: radial-gradient(circle, var(--network-node-ring) 0%, transparent 72%);
  filter: blur(26px);
  opacity: 0.58;
}

.network-system--primary {
  top: 5rem;
  right: -3rem;
  width: min(38vw, 34rem);
}

.network-system--secondary {
  left: -4rem;
  bottom: 7rem;
  width: min(26vw, 23rem);
  opacity: 0.34;
  animation-duration: 24s;
  animation-delay: -9s;
}

.network-system--secondary svg {
  transform: scaleX(-1) rotate(10deg);
  transform-origin: center;
}

.network-system svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.network-wire {
  fill: none;
  stroke: var(--network-wire);
  stroke-width: 1.35;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.network-wire--soft {
  stroke: var(--network-wire-soft);
}

.network-signal {
  fill: none;
  stroke: var(--network-signal);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-dasharray: 2 132;
  opacity: 0.96;
  filter: drop-shadow(0 0 8px var(--network-signal-glow));
  animation: network-flow 9.5s linear infinite;
}

.network-signal--slow {
  animation-duration: 12.5s;
}

.network-signal--delayed {
  animation-delay: -4.2s;
}

.network-signal--late {
  animation-delay: -7s;
}

.network-point {
  transform-box: fill-box;
  transform-origin: center;
  animation: network-point-pulse 5.8s ease-in-out infinite;
}

.network-point--delay-a {
  animation-delay: -1.4s;
}

.network-point--delay-b {
  animation-delay: -2.8s;
}

.network-node {
  fill: var(--network-node);
  filter: drop-shadow(0 0 8px var(--network-signal-glow));
}

.network-node-ring {
  fill: none;
  stroke: var(--network-node-ring);
  stroke-width: 1.2;
  opacity: 0.82;
}

@keyframes network-sheen {
  0% {
    transform: translate3d(-2%, -1%, 0) rotate(-3deg) scale(1);
  }
  100% {
    transform: translate3d(2%, 1.5%, 0) rotate(3deg) scale(1.03);
  }
}

@keyframes network-breathe {
  0%, 100% {
    transform: translate3d(0, 0, 0) scale(0.988);
  }
  50% {
    transform: translate3d(0.6rem, -0.45rem, 0) scale(1.018);
  }
}

@keyframes network-point-pulse {
  0%, 100% {
    transform: scale(0.94);
    opacity: 0.74;
  }
  50% {
    transform: scale(1.11);
    opacity: 1;
  }
}

@keyframes network-flow {
  0% {
    stroke-dashoffset: 0;
    opacity: 0;
  }
  12% {
    opacity: 0.7;
  }
  50% {
    opacity: 1;
  }
  88% {
    opacity: 0.7;
  }
  100% {
    stroke-dashoffset: -180;
    opacity: 0;
  }
}

@media (max-width: 1100px) {
  .network-system--primary {
    width: min(42vw, 31rem);
    right: -4rem;
  }

  .network-system--secondary {
    width: min(30vw, 20rem);
    left: -5rem;
    bottom: 5rem;
  }
}

@media (max-width: 768px) {
  .network-system--primary {
    top: 4.5rem;
    right: -8rem;
    width: 28rem;
    opacity: 0.32;
  }

  .network-system--secondary {
    left: -7rem;
    bottom: 2rem;
    width: 18rem;
    opacity: 0.2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .network-theme::before,
  .network-system,
  .network-signal,
  .network-point {
    animation: none;
  }
}

/* FINDING-005 — minimum 44px touch target for nav and footer links */
nav a,
footer a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
}