:root {
  --cell-size: 20px;
  --gap-size: 2px;
  --board-bg: #1a1a1a;;
}

/* Layout */
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #f5f5f5;
}

#container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 20px;
}

/* HUD */
#hud {
  display: flex;
  gap: 20px;
  font-weight: bold;
}

/* Game area */
#inner-container {
  position: relative;
}

/* Board */
#blocs-container {
  display: grid;
  grid-template-columns: repeat(10, var(--cell-size));
  gap: var(--gap-size);
  padding: var(--gap-size);
  border: 2px solid #000;
  background: #222;
}

/* Overlay */
#game-over {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  color: white;
  display: none;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
  font-size: 1.2rem;
  z-index: 10;
}

/* Blocks */
.bloc,
.moving-bloc,
.non-moving-bloc {
  width: var(--cell-size);
  height: var(--cell-size);
}

.bloc {
  background-color: var(--board-bg);
}

.moving-bloc {
  background-color: black;
}

.non-moving-bloc {
  background-color: brown;
}

.lowest-possible-position {
  background-color: white;
}

/* Tetromino colors */
.cyan {
  background: linear-gradient(135deg, #00e5ff, #0097a7);
}

.yellow {
  background: linear-gradient(135deg, #fff176, #fbc02d);
}

.purple {
  background: linear-gradient(135deg, #ce93d8, #8e24aa);
}

.green {
  background: linear-gradient(135deg, #69f0ae, #2e7d32);
}

.red {
  background: linear-gradient(135deg, #ff5252, #c62828);
}

.blue {
  background: linear-gradient(135deg, #82b1ff, #1565c0);
}

.orange {
  background: linear-gradient(135deg, #ffb74d, #ef6c00);
}