body {
  margin: 0;
  background: #1b1b1b;
  font-family: Arial, sans-serif;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
}

.title {
  font-size: 2.5rem;
  margin-bottom: 40px;
}

.btn {
  background: rgb(221, 220, 220);
  border: none;
  border-radius: 50%;
  width: 180px;
  height: 180px;
  font-size: 2rem;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 8px 0 rgb(148, 148, 148);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  font-size: 2.5rem;
}

.btn:active {
  transform: translateY(8px);
  box-shadow: 0 0 0 #990000;
}

.footer {
  margin-top: 30px;
  opacity: 0.6;
}