/* ==========================================================================
   Core network — interactive hub connecting Skulgram, Staygram, Guardgram,
   Vaultgram, AI Labs, Hosting, and Web Development to the Vygotanium core.
   ========================================================================== */

.core-network-section { padding: var(--space-7) 0; }

.core-network {
  margin-top: var(--space-6);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: var(--space-5);
  align-items: center;
}

.core-network-diagram {
  position: relative;
  width: 100%;
  max-width: 620px;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
}

.core-network-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.core-ring {
  fill: none;
  stroke: var(--hairline);
  stroke-width: 0.25;
}

.core-ring-outer { animation: core-ring-spin 90s linear infinite; stroke-dasharray: 0.6 2.4; }
.core-ring-inner { animation: core-ring-spin 60s linear infinite reverse; stroke-dasharray: 0.4 1.6; opacity: 0.6; }

@keyframes core-ring-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.core-ring-outer, .core-ring-inner { transform-origin: 50% 50%; }

.core-halo {
  animation: core-halo-pulse 5s ease-in-out infinite;
  transform-origin: 50% 50%;
}

@keyframes core-halo-pulse {
  0%, 100% { opacity: 0.55; transform: scale(1); }
  50%      { opacity: 0.9; transform: scale(1.08); }
}

/* static faint connector */
.core-link {
  fill: none;
  stroke: var(--hairline);
  stroke-width: 0.35;
  opacity: 0.6;
  transition: opacity 0.35s var(--ease-out), stroke 0.35s var(--ease-out);
}

/* animated traveling pulse along the same path — sparse dash simulating
   a single point of light in continuous, purposeful motion */
.core-link-flow {
  fill: none;
  stroke: url(#coreLineGradient);
  stroke-width: 0.5;
  stroke-linecap: round;
  stroke-dasharray: 1.4 22;
  opacity: 0.55;
  animation: core-flow 3.2s linear infinite;
}

.core-link[data-node="staygram"],
.core-link-flow[data-node="staygram"] { animation-delay: 0.4s; }
.core-link[data-node="guardgram"],
.core-link-flow[data-node="guardgram"] { animation-delay: 0.8s; }
.core-link[data-node="vaultgram"],
.core-link-flow[data-node="vaultgram"] { animation-delay: 1.2s; }
.core-link[data-node="ai-labs"],
.core-link-flow[data-node="ai-labs"] { animation-delay: 1.6s; }
.core-link[data-node="hosting"],
.core-link-flow[data-node="hosting"] { animation-delay: 2s; }
.core-link[data-node="web-development"],
.core-link-flow[data-node="web-development"] { animation-delay: 2.4s; }

@keyframes core-flow {
  to { stroke-dashoffset: -46; }
}

.core-link.is-active {
  stroke: var(--cyan);
  opacity: 1;
}
.core-link-flow.is-active {
  opacity: 1;
  stroke-width: 0.7;
}

/* ---- center hub ---- */
.core-hub {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 21%;
  height: 21%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 35% 30%, rgba(95,212,216,0.16), var(--ink-raised) 68%);
  border: 1px solid rgba(95,212,216,0.35);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.03), 0 0 40px -8px rgba(95,212,216,0.45), inset 0 0 20px rgba(0,0,0,0.4);
}

.core-hub img {
  width: 46%;
  height: 46%;
  filter: drop-shadow(0 0 10px rgba(95,212,216,0.5));
}

/* ---- nodes ---- */
.core-node {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: clamp(58px, 13%, 78px);
  padding: 10px 4px 8px;
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--paper-dim);
}

.core-node-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--graphite);
  border: 1px solid var(--hairline);
  color: var(--paper-dim);
}

.core-node-icon svg { width: 16px; height: 16px; }

.core-node-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--silver-dim);
}
.core-node-dot.status-live { background: var(--cyan); box-shadow: 0 0 6px 1px rgba(95,212,216,0.7); animation: dot-pulse 2.6s ease-in-out infinite; }
.core-node-dot.status-progress { background: var(--amber); box-shadow: 0 0 6px 1px rgba(240,180,41,0.6); }
.core-node-dot.status-research { background: var(--violet); box-shadow: 0 0 6px 1px rgba(139,124,246,0.6); }

.core-node-label {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--paper-dim);
  line-height: 1.2;
}

.core-node:hover,
.core-node:focus-visible {
  outline: none;
}
.core-node:hover .core-node-icon,
.core-node:focus-visible .core-node-icon,
.core-node.is-active .core-node-icon {
  transform: translateY(-3px) scale(1.08);
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 10px 26px -10px rgba(95,212,216,0.55);
}
.core-node:hover .core-node-label,
.core-node:focus-visible .core-node-label,
.core-node.is-active .core-node-label { color: var(--paper); }

/* ---- detail panel ---- */
.core-network-detail {
  padding: 32px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  background: var(--graphite);
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: border-color 0.3s ease;
}

.core-detail-tag { display: block; margin-bottom: 12px; }

.core-detail-title {
  font-size: clamp(20px, 2.4vw, 26px);
  margin-bottom: 12px;
  transition: opacity 0.25s ease;
}

.core-detail-desc {
  color: var(--paper-dim);
  line-height: 1.6;
  transition: opacity 0.25s ease;
}

.core-detail-status {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  gap: 7px;
  margin-top: 20px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--silver);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.core-detail-status.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .core-network { grid-template-columns: 1fr; }
  .core-network-detail { min-height: 0; }
}

@media (max-width: 560px) {
  .core-node-icon { width: 28px; height: 28px; }
  .core-node-icon svg { width: 13px; height: 13px; }
  .core-node-label { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .core-ring-outer, .core-ring-inner, .core-halo, .core-link-flow, .core-node-dot.status-live {
    animation: none !important;
  }
}