.dashboard {
      display: grid;
      gap: 2rem;
      grid-template-columns: 1fr;
      max-width: 1200px;
      margin: auto;
      margin-bottom: 30px;
    }

    @media(min-width: 768px) {
      .dashboard {
        grid-template-columns: 1fr 1fr;
      }
    }

    .chart-card {
      background: #fff;
      padding: 1.5rem;
      border-radius: 12px;
      box-shadow: 0 4px 8px 5px rgba(0, 0, 0, 0.4);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .chart-title {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 1rem;
    }

    canvas {
      width: 100% !important;
      height: auto !important;
    }

    .controls {
      margin-top: 1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
    }

    .controls button {
      background: #e4e7eb;
      border: none;
      border-radius: 6px;
      padding: 6px 12px;
      margin: 2px;
      font-weight: 600;
      cursor: pointer;
    }

    .controls button.active {
      background-color: #4a3b7b;
      color: white;
    }

    .controls .download {
      background: #4a3b7b;
      color: white;
    }