/* Apply box-sizing to all elements */
* {
  box-sizing: border-box;
}

/* Style the body */
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

/* Horizontal navigation bar */
.navbar {
  overflow: hidden;
  background-color: #111;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1;
  display: flex;
}

/* Links inside the navbar */
.navbar a {
  color: white;
  padding: 16px 20px;
  text-decoration: none;
  display: block;
}

/* Hover effect */
.navbar a:hover {
  background-color: #ddd;
  color: black;
}

/* Main content */
.content {
  margin-top: 60px;  /* Space for the fixed navbar */
  padding: 20px;
}
/* ── Chart grid for 4 plots ───────────────────────────────────────── */
.chart-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.chart-container > div {
  height: 400px;  /* ensure enough room for each Plotly figure */
}