body {
  margin: 0;
  background: #0a0a0a;
  font-family: Arial, sans-serif;
  color: white;
}

.container {
  max-width: 500px;
  margin: 0 auto;
  padding: 20px;
  text-align: center;
}

.step {
  display: none;
}

.step.active {
  display: block;
}

h2 {
  font-size: 22px;
}

input {
  display: block;
  width: 90%;
  margin: 10px auto;
  padding: 12px;
  font-size: 16px;
  border-radius: 6px;
  border: none;
}

button {
  width: 90%;
  max-width: 400px;
  margin: 10px auto;
  padding: 15px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  background-color: white;
  color: black;
}

button:hover {
  opacity: 0.95;
}

.btn-submit {
  background-color: #0aad4f;
  color: white;
}

.logo {
  max-width: 100px;
  margin: 20px auto;
  display: block;
}

.bar {
  height: 6px;
  background: #444;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 20px;
}

.bar span {
  display: block;
  height: 100%;
  width: 20%;
  background: #0aad4f;
}

.footer {
  margin-top: 30px;
  font-size: 14px;
}

.alert-box {
  background-color: #0aad4f;
  color: white;
  font-weight: bold;
  padding: 12px;
  border-radius: 10px;
  margin: 10px auto 25px;
}

.back {
  background: none;
  color: white;
  text-align: left;
  width: 100%;
  font-size: 16px;
  margin-bottom: 10px;
  border: none;
  cursor: pointer;
}