body {
  font-family: "Rock 3D", system-ui;
  background-color: #c50000;
  color: #ffffff;
  margin: 0;
  padding: 0;
}

h1 {
  text-align: center;
  font-size: 1.5em;
  margin-top: 20px;
  margin-bottom: 20px;
  color: #ffffff;
}

.grid {
  display: grid;
  grid-template-columns: repeat(90, 7px);
  grid-template-rows: repeat(90, 7px);
  gap: 1px;
  position: absolute;
  top: 54%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.sidebar {
  position: fixed;
  left: 10%;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
}

.sidebar button {
  padding: 10px 20px;
  margin: 10px 0;
  cursor: pointer;
  font-size: 16px;
  background-color: #f0f0f06a;
  border: 1px solid #ccc;
  
  transition: background-color 0.3s;
  font-family: "Rock 3D", system-ui;
  font-weight: 400;
  font-style: normal;
}

.sidebar button:hover {
  background-color: #e0e0e0;
}

.controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
}

.controls button {
  padding: 5px 10px;
  cursor: pointer;
  font-size: 16px;
  background-color: #f0f0f06a;
  border: 1px solid #ccc;
  transition: background-color 0.3s;
  font-family: "Rock 3D", system-ui;
  font-weight: 400;
  font-style: normal;
}

.controls button:hover {
  background-color: #e0e0e0;
}

.cell-empty,
.cell-full,
.cell-preview {
  width: 10px;
  height: 10px;
  border: 1px solid lightgray;
  box-sizing: border-box;
}

.cell-preview {
  opacity: 0.5;
}

.cell-empty {
  width: 10px;
  height: 10px;
  background-color: white;
}

.cell-full {
  background-color: black;
}

footer {
  text-align: center;
  padding: 5px;
  height: 30px;
  color: #000000;
  position: fixed;
  bottom: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
footer a {
  color: #00acee;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Thème sombre */

  body {
    background-color: #121212;
    color: #f1f1f1;
  }

  h1 {
    color: #f1f1f1;
  }

  .sidebar button,
  .controls button {
    background-color: #333;
    color: #f1f1f1;
    border: 1px solid #555;
  }

  .sidebar button:hover,
  .controls button:hover {
    background-color: #444;
  }

  .cell-empty {
    background-color: #1e1e1e;
    border: 1px solid #555;
  }

  .cell-full {
    background-color: #f1f1f1;
  }

  footer {
    color: #f1f1f1;
  }

  footer a {
    color: #ee0000;

    footer a:hover {
      text-decoration: underline;
    }
  }