html, body {
  margin: 0;
  padding: 0;
  background: #1a1a1a;
  color: #fff;
  font-family: 'Arial', sans-serif;
}

.sequencer {
  max-width: max-content;
  margin: 20px auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.grid {
  display: grid;
  gap: 2px;
  margin-bottom: 40px;
  position: relative;
  justify-content: center;
  padding: 0 2px; /* Add padding to accommodate dividers */
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

.grid-4-4 {
  grid-template-columns: repeat(16, 40px);
}

.grid-3-4 {
  grid-template-columns: repeat(12, 40px);
}

.cell {
  width: 38px;
  height: 38px;
  background: #333;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.1s ease;
}

.cell.active {
  transform: scale(0.95);
}

.cell.active-0 { background: #FF3366; }
.cell.active-1 { background: #33FF57; }
.cell.active-2 { background: #3366FF; }
.cell.active-3 { background: #FFFF33; }

.playhead {
  position: absolute;
  top: -10px;
  width: 2px;
  height: calc(100% + 20px);
  background: rgba(255, 255, 255, 0.8);
  transition: transform 0.1s linear;
  pointer-events: none;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.measure-divider {
  position: absolute;
  width: 2px;
  height: 100%;
  background: rgba(255, 255, 255, 0.3);
  pointer-events: none;
}

#controls {
  text-align: center;
  padding: 20px;
}

#playButton {
  background: #ff3366;
  border: none;
  padding: 10px 20px;
  color: white;
  font-size: 16px;
  border-radius: 25px;
  cursor: pointer;
  margin-right: 20px;
}

#tempoSlider {
  width: 200px;
  margin: 0 10px;
}

.title {
  text-align: center;
  font-size: 2.5em;
  margin: 30px 0;
  color: #eee;
  text-shadow: 0 0 10px rgba(255, 51, 102, 0.3);
}