.container-body {
  border: 1px solid lightgray;
  border-radius: 10px;
  padding: 20px;
}

/* Title */
h3 {
  text-align: center;
}

/* Form/input elements */
input[type="number"] {
  font-size: 16px;
  width: 100%;
  max-width: 100px;
}

input[type="number"]:focus {
  outline: none;
  border-color: #0080ff;
  box-shadow: 0px 0px 5px #0080ff;
}

button:hover {
  color: white;
  background-color: #327ecf;
}

/* Routh array table */
table {
  margin-top: 20px;
  width: 100%;
  border-collapse: collapse;
}

table td {
  text-align: center;
  vertical-align: middle;
}

/* Header of routh matrix */
#matrix-header,
#result-header {
  margin-top: 40px;
  display: none;
}

#result-container {
  padding: 20px;
}

/* Dropdown Instructions */

.dropdown-header {
  cursor: pointer;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f1f1f1;
  opacity: 95%;
  min-width: 200px;
  padding: 10px;
  z-index: 1;
}

.dropdown-content p {
  margin: 0;
}

.dropdown-content ol {
  margin: 0;
  padding-left: 20px;
}

.dropdown:hover .dropdown-content {
  display: block;
}