body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
}

#heat-map {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  max-width: 960px;
  height: auto;
}

#svg-container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 90%;
  max-height: 600px;
  padding: 1rem 0;
  padding-left: 2rem;
  background-color: rgba(251, 245, 214, 0.7);
}

svg {
  display: block;
}

.axis {
  font-size: 0.8rem;
}

#title {
  fill: #e3b508;
}

#description {
  fill: #5ea496;
}

.cell:hover {
  cursor: pointer;
}

#tooltip {
  pointer-events: none;
  text-align: center;
  background-color: #000;
  color: #fff;
  border-radius: 6px;
  font-size: 1rem;
  padding: 8px 10px;
  line-height: 1.3;
}

@media (max-width: 768px) {
  #svg-container {
    width: 100%;
  }
}

@media (max-width: 700px) {
  #tooltip {
    font-size: 2vw;
    padding: 6px;
  }
}