.btn-primary {
    background: linear-gradient(45deg, #25D366, #128C7E); /* WhatsApp-inspired green gradient */
    border-radius: 12px;
    width: 100%;
    padding: 12px;
    margin: 15px 0;
    font-size: 18px;
    font-weight: bold;
    color: #ffffff;
    border: none;
    cursor: pointer;
    box-shadow: 0 6px 12px rgba(18, 140, 126, 0.3); /* Subtle green shadow */
    transition: all 0.3s ease;
}

button.btn-primary:hover {
    background: linear-gradient(45deg, #128C7E, #25D366); /* Reverse gradient on hover */
    box-shadow: 0 8px 16px rgba(18, 140, 126, 0.4); /* Stronger shadow on hover */
    transform: translateY(-2px); /* Lift effect */
}


/* Input Fields with form-control class */
.form-control {
  width: 100%;
  padding: 12px 15px;
  margin: 10px 0;
  border: none;
  border-radius: 8px;
  background: #f5f5f5;
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.1);
  font-size: 16px;
  outline: none;
  transition: all 0.3s ease;
}

.form-control:focus {
  background: #ffffff;
  box-shadow: 0 0 8px rgba(78, 154, 241, 0.5);
  border: 1px solid #4e9af1;
}


/* Full-page gradient animation for #auth */
#sidebar {
  height: 100vh; /* Full viewport height */
  width: 100%; /* Full viewport width */
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(-45deg, #ff9a9e, #fad0c4, #fbc2eb, #a18cd1);
  background-size: 400% 400%;
  animation: gradientAnimation 8s ease infinite;
}

/* Keyframes for gradient animation */
@keyframes gradientAnimation {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}