body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.how-to-btn {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1050; /* Ensure it stays above other elements */
}

.form-signin {
  width: 100%;
  max-width: 400px;
  padding: 30px;
  margin: auto;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
}