body {
  background-color: #ffffff; /* changed to white */
  font-family: 'Segoe UI', sans-serif;
  color: #333333; /* darker text for contrast */
  padding-top: 60px;
  margin: 0;
}

.container {
  max-width: 400px;
  margin: 0 auto;
  background-color: #f9f9f9; /* light gray background inside container */
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 0 10px #4CAF50;
}

/* Form labels */
label, .form-label {
  display: block;
  margin-bottom: 6px;
  color: #4CAF50; /* green labels */
  font-weight: 600;
}

/* Form inputs */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
.form-control {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #4CAF50;
  border-radius: 6px;
  background-color: #ffffff;
  color: #333333;
  transition: box-shadow 0.3s;
  font-size: 16px;
  box-sizing: border-box;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
.form-control:focus {
  outline: none;
  box-shadow: 0 0 8px #4CAF50;
  border-color: #388E3C;
  background-color: #ffffff;
}

/* Submit button */
button, .btn-primary {
  width: 100%;
  background-color: #4CAF50;
  border: none;
  border-radius: 6px;
  padding: 12px;
  font-weight: 600;
  font-size: 16px;
  color: white;
  cursor: pointer;
  transition: background-color 0.3s, border-color 0.3s;
}

button:hover, .btn-primary:hover {
  background-color: #388E3C;
  border-color: #2e7d32;
}

/* Messages */
p.error, .alert-danger {
  background-color: #ffebee;
  color: #c62828;
  border: 1px solid #ef9a9a;
  padding: 10px;
  margin-bottom: 15px;
  border-radius: 6px;
}

p.success, .alert-success {
  background-color: #d0f0d0;
  color: #2e7d32;
  border: 1px solid #a5d6a7;
  padding: 10px;
  margin-bottom: 15px;
  border-radius: 6px;
}

/* Back button */
.back-btn {
  position: absolute;
  top: 20px;
  left: 20px;
  background-color: #4CAF50;
  color: white;
  padding: 8px 16px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s;
  z-index: 1050;
}

.back-btn:hover {
  background-color: #388E3C;
  color: white;
}

/* Responsive tweaks */
@media (max-width: 576px) {
  .container {
    margin: 20px 15px;
    padding: 20px;
  }

  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="number"],
  .form-control {
    font-size: 14px;
  }

  button, .btn-primary {
    font-size: 14px;
    padding: 10px;
  }
}