:root {
  --body-bg: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  --msger-bg: #fff;
  --border: 2px solid #ddd;
  --left-msg-bg: #8cff96;
  --right-msg-bg: #579ffb;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}

.container {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

form {
    display: flex;
    flex-direction: column;
}

.form-group {
    margin-bottom: 15px;
}

label {
    font-weight: bold;
}

input[type="text"],
input[type="password"] {
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
}

.submit-button {
    text-align: center;
}

.signup-link {
    text-align: center;
    margin-top: 10px;
}

.error_message {
  color: red;
}