#maindiv {
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  background-color: #f5f5f5;
}
canvas {
  border: 1px solid #ccc;
  background-color: white;
  margin-top: 20px;
}
select, input {
  padding: 5px;
  font-size: 1rem;
  margin: 5px;
}
.matrix-input, .options {
  display: grid;
  grid-template-columns: auto auto;
  gap: 5px;
  margin-top: 10px;
}
#eigenInfo {
  margin-top: 20px;
  font-size: 0.9rem;
  background: #fff;
  padding: 10px;
  border: 1px solid #ccc;
  max-width: 500px;
}

.matrix {
  display: flex;
  align-items: center;
  font-family: serif; /* Math-style look */
  font-size: 5em; /* Size of parentheses */
  line-height: 1;
}
.matrix .paren {
  position: relative;
  top: -0.1em; /* Adjust this value until it looks perfect */
}
.matrix .aequals {
  font-size: 0.5em; /* Size of parentheses */
  margin-right: 0.15em;
  position: relative;
  top: -0.1em; /* Adjust this value until it looks perfect */
}
.matrix-grid {
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 0.1em 0.1em; /* Row gap, Column gap */
  margin: 0; /* Space between parentheses and numbers */
}

.matrix-grid input {
  width: 1.6em;
  font-size: 0.35em; /* Small text relative to parentheses */
  text-align: center;
  padding: 0;
  margin: 0;
  height: 1.2em;
  line-height: 1.2em;
  box-sizing: border-box;
}