styles.css

html, body {
  height: 100%;
  margin: 0;
}

* {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: Montserrat, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

#handsontable-container.handsontable {
  height: 100%;
}

.sponsors {
  position: fixed;
  top: 20px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

.sponsors a {
  margin: 0 30px;
  display: inline-flex;
  flex-direction: column;
  border-radius: 5px;
  text-decoration: none;
  max-width: calc(300px + 2*20px + 2*3px);
}

.sponsors a:hover {
  text-decoration: underline;
}

.sponsors a span {
  font-size: 14px;
  margin-bottom: 18px;
  text-align: center;
}

.sponsors div {
  width: 100%;
  text-align: center;
}

.place-your-ad-here {
  display: inline-block;
  border: 3px solid #126BCF;
  border-radius: 5px;
  color: #126BCF;
  font-weight: bold;
  padding: 10px 25px;
  text-align: center;
  line-height: 1.5;
}