style_heatmap.css

h1 {
  text-align: center;
}

h1:not(:first-child) {
  margin-top: 50px;
}

.chart{
  width: 600px;
  height: 150px;
  background-color: #f7f7f7;
  margin: 25px auto;
}

.button {
            border: none;
            color: white;
            padding: 16px 32px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin: 4px 2px;
            transition-duration: 0.4s;
            cursor: pointer;
        }

.button1 {
            background-color: yellow; 
            color: black; 
            border: 2px solid #4CAF50;
        }

.button1:hover {
            background-color: #4CAF50;
            color: white;
        }