body {
  margin: 0;
  background: #000;
  font-family: Arial, Helvetica, sans-serif;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.card {
  width: 95%;
  max-width: 420px;
  background: #0d0d0d;
  padding: 25px;
  border-radius: 14px;
  text-align: center;
}

h1 {
  font-size: 18px;
  margin-bottom: 20px;
}

.tutorial {
  background: #111;
  border-left: 4px solid red;
  padding: 15px;
  text-align: left;
  font-size: 14px;
}

.red {
  color: red;
  font-weight: bold;
}

button {
  width: 100%;
  margin-top: 20px;
  padding: 15px;
  border: none;
  border-radius: 8px;
  background: #333;
  color: #aaa;
  font-size: 16px;
  cursor: not-allowed;
}

button.active {
  background: red;
  color: #fff;
  cursor: pointer;
}

.alert {
  color: red;
  font-size: 12px;
  margin-top: 15px;
}
.tutorial-gif {
  width: 100%;
  max-width: 100%;
  height: auto;

  border-radius: 12px;
  margin: 10px 0 15px 0;

  object-fit: cover;

  box-shadow: 0 0 20px rgba(0,0,0,0.6);
}