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

html, body {
  background: #0f172a;
  color: #e2e8f0;
  font-family: system-ui, -apple-system, sans-serif;
  overflow-x: hidden;
  scroll-behavior: auto;
}

body {
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

#app {
  position: relative;
  width: 100%;
}

#scroll-container {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40vh 0 80vh 0;
}

.node {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 60px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  will-change: transform, opacity, filter;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.node .aura {
  position: absolute;
  inset: -30px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(148, 163, 184, 0.12) 0%, transparent 70%);
  will-change: opacity, transform;
  pointer-events: none;
}

.node svg {
  width: 56px;
  height: 56px;
  fill: #94a3b8;
  filter: drop-shadow(0 0 8px rgba(148, 163, 184, 0.25));
  will-change: transform, opacity, filter;
  transition: none;
}

.node .label {
  position: absolute;
  bottom: -28px;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #64748b;
  opacity: 0;
  will-change: opacity;
  pointer-events: none;
  white-space: nowrap;
}

#overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.9);
  z-index: 100;
  will-change: opacity;
  cursor: pointer;
  transition: opacity 0.6s ease-out;
}

#overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

#overlay h1 {
  font-size: 28px;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: #94a3b8;
  text-transform: uppercase;
}

#overlay p {
  margin-top: 16px;
  font-size: 14px;
  color: #475569;
  letter-spacing: 0.1em;
}

#velocity-indicator {
  position: fixed;
  bottom: 20px;
  right: 20px;
  font-size: 10px;
  font-family: monospace;
  color: #334155;
  z-index: 50;
  pointer-events: none;
}