#messages {
  margin-top: 1em;
  border: 1px solid #aaa;
  padding: 1em;
  height: 200px;
  overflow-y: auto;
}

.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1em;
}

.param-item {
  display: flex;
  flex-direction: column;
}

.form-row {
  display: flex;
  align-items: center;
  margin-bottom: 1em;
  gap: 1em;
}

.tooltip {
  position: relative;
  cursor: pointer;
  border-bottom: 1px dotted #555;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 220px;
  background-color: #333;
  color: #fff;
  text-align: left;
  border-radius: 6px;
  padding: 8px;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -110px;
  opacity: 0;
  transition: opacity 0.3s;
  font-size: 0.95em;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}

.canvas-container {
  width: 100%;
  height: 100vh;
  max-width: 900px;
  margin: auto;
  border: #333 solid 1px;
}

footer {
  text-align: center;
  margin-top: 2em;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5em;
}

#demo-container {
  display: flex;
  flex-direction: row;
  gap: 15px;
}

#controls-container {
  flex: 1;
  max-width: 600px;
}

#chart-container {
  flex: 2;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#canvas-container {
    border: #333 solid 1px;
    min-width: 100vh;
    min-height: 50vh;
}

canvas #waveCanvas {
  background-color: rgb(0, 25, 45);
  cursor: crosshair;
  min-width: inherit;
  min-height: inherit;
}

#messages {
  border: 1px solid #aaa;
  padding: 1em;
  height: 150px;
  overflow-y: auto;
  background-color: #f9f9f9;
}

fieldset {
  margin-bottom: 20px;
  border: 1px solid #ccc;
  padding: 10px;
  border-radius: 5px;
}

legend {
  width: auto;
  padding: 0 10px;
  font-weight: bold;
}