body {
    font-family: 'Roboto', Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f0f2f5;
    color: #333;
}

.container {
    width: 90%;
    max-width: 400px;
    margin: 50px auto;
    overflow: hidden;
    padding: 20px;
}

.auth-form {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

.auth-form h2 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 20px;
}

.auth-form input[type="text"],
.auth-form input[type="password"] {
    width: 92%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.auth-form input[type="text"]:focus,
.auth-form input[type="password"]:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 5px rgba(52,152,219,0.5);
}

.auth-form input[type="submit"] {
    width: 100%;
    padding: 10px;
    background: linear-gradient(to right, #2c3e50, #3498db);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.auth-form input[type="submit"]:hover {
    opacity: 0.9;
}

.form-footer {
    text-align: center;
    margin-top: 15px;
}

.form-footer a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.form-footer a:hover {
    color: #2c3e50;
}

.error {
    background-color: #e74c3c;
    color: #fff;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    text-align: center;
}

@media (max-width: 768px) {
    .container {
        width: 95%;
    }
}