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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f0f4f8;
  color: #333;
  line-height: 1.6;
}

.dashboard-header {
  background-color: #1e3a5f;
  color: #fff;
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.dashboard-header h1 {
  font-size: 28px;
  margin-bottom: 10px;
}

.dashboard-header nav a {
  color: #fff;
  text-decoration: none;
  padding: 0 10px;
  font-weight: 500;
}

.dashboard-header nav a:hover {
  text-decoration: underline;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
  gap: 25px;
  padding: 30px;
}

.card {
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  padding: 15px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card h2 {
  font-size: 18px;
  margin-bottom: 15px;
  color: #1e3a5f;
  text-align: center;
}

.card h3 {
  font-size: 18px;
  margin-bottom: 15px;
  color: #1e3a5f;
  text-align: center;
}

.chart-area {
  flex-grow: 1;
  overflow: auto;
}

.dashboard-footer {
  text-align: center;
  padding: 15px;
  background-color: #1e3a5f;
  color: #fff;
  margin-top: 20px;
  font-size: 14px;
}

/* Styling for horizontal dividers between chart sections */
.section-divider {
  border: 0;
  border-top: 2px solid #ccc;  /* Subtle gray line */
  margin: 30px 0;              /* Adds space before and after the divider */
}

/* Responsive Design */
@media only screen and (max-width: 768px) {
  .dashboard-header {
    padding: 15px;
  }

  .dashboard-header h1 {
    font-size: 24px;
  }

  .dashboard-header nav a {
    font-size: 14px;
    padding: 0 5px;
  }

  .dashboard-grid {
    padding: 15px;
    grid-template-columns: 1fr;  /* Stack cards in a single column on smaller screens */
  }

  .card {
    padding: 10px;
  }

  .card h2, .card h3 {
    font-size: 16px;
  }

  .dashboard-footer {
    padding: 10px;
    font-size: 12px;
  }
}

/* Additional responsiveness for very small screens (e.g., mobile phones) */
@media only screen and (max-width: 480px) {
  .dashboard-header h1 {
    font-size: 20px;
  }

  .dashboard-header nav a {
    font-size: 12px;
  }

  .card h2, .card h3 {
    font-size: 14px;
  }

  .dashboard-footer {
    font-size: 10px;
  }
}