#equationForm {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
  max-width: 400px;
}

#equationForm label {
  font-weight: 600;
  color: #000;
  margin-bottom: 0.2rem;
}

#equationForm input {
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 0.5rem;
  font-size: 1rem;
  width: 100%;
}

#equationForm input:focus {
  outline: none;
  border-color: #0a66c2;
  box-shadow: 0 0 0 2px rgba(10, 102, 194, 0.2);
}

#plotBtn {
  background: #0a66c2;
  color: #fff;
  font-size: 1rem;
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background 0.2s ease-in-out;
  width: 100%;
  max-width: 200px;
}

#plotBtn:hover,
#plotBtn:focus {
  background: #084a94;
}

#plot {
  width: 100% !important;
  max-width: 100%;
  height: 400px;
  overflow: hidden;
}

@media (min-width: 768px) {
  #plot {
    height: 500px;
  }
}