* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Arial", sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #282c34;
  color: white;
}

.inner-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #3b3b5f;
  border-radius: 8px;
  padding: 20px;
  width: 300px;
}

#pad-bank {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 15px;
}

.drum-pad {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 70px;
  height: 70px;
  background: #444;
  border-radius: 5px;
  font-size: 1.2em;
  cursor: pointer;
}

.controls-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.control {
  display: flex;
  justify-content: space-between;
  width: 100%;
  margin: 10px 0;
}

.select {
  width: 50px;
  height: 20px;
  background: #555;
  border-radius: 10px;
  cursor: pointer;
  position: relative;
}

.select .inner {
  position: absolute;
  width: 18px;
  height: 18px;
  background: #ffaa33;
  border-radius: 50%;
  top: 1px;
  left: 1px;
  transition: left 0.2s ease;
}

.select.on .inner {
  left: calc(100% - 18px);
}

#display {
  margin: 15px 0;
  text-align: center;
  font-size: 1em;
  padding: 20px;
  background: #444;
  border-radius: 5px;
  width: 100%;
}

.volume-slider {
  text-align: center;
}

.volume-slider input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: #ffaa33;
  border-radius: 2px;
  margin-bottom: 10px;
}

.control {
  display: flex;
  justify-content: space-between;
  width: 100%;
  margin: 10px 0;
}