:root {
  --primary:#2563eb;
  --bg:#f1f5f9;
  --text:#1e293b;
  --card:#ffffff;
  --border:#dddddd;
}
* {
  margin:0; padding:0; box-sizing:border-box;
}
body {
  font-family: sans-serif;
  background: var(--bg);
  color: var(--text);
}
#tsparticles {
  position: fixed; top:0; left:0;
  width:100%; height:100%; z-index:-1;
}
.header {
  background: var(--card);
  padding: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.brand-title {
  color: var(--primary);
  font-size: 1.875rem;
}
.brand-subtitle {
  font-size: 1rem;
  margin-top: 4px;
}
.tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin: 16px 0;
}
.tab-button {
  padding: 8px 16px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
}
.tab-button.active {
  border-bottom: 2px solid var(--primary);
  color: var(--primary);
}
.tab-content {
  display: none;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s;
  padding: 0 16px;
}
.tab-content.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}
.card {
  background: var(--card);
  padding: 16px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
}
.controls button {
  margin-right: 8px;
  padding: 8px 12px;
  border: none;
  border-radius: 4px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}
.visualization canvas {
  width: 100%;
  height: 300px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #fff;
}
.analytics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.controls label {
  margin-right: 8px;
  font-size: 0.9rem;
}