body {
  margin: 0;
  font-family: sans-serif;
  background: #f0f0f0;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #333;
  color: white;
  padding: 10px 20px;
}

.navbar .logo {
  font-size: 1.5em;
  font-weight: bold;
}

.speed-control {
  font-size: 1em;
}

.speed-control select {
  margin-left: 10px;
  padding: 5px;
  font-size: 1em;
}

.soundboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 10px;
  padding: 20px;
}

.button {
  position: relative;
  width: 100%;
  padding-bottom: 100%;
  background: #ddd;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
}

.button img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.button::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.2);
}

button {
  margin: 10px;
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
}