.form-container {
    max-width: 400px;
    font-family: Arial, sans-serif;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #333;
}

.form-input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.form-input:valid {
    border-color: #28a745;
    background-color: #f8fff8;
}

.form-input:invalid {
    border-color: #dc3545;
    background-color: #fff5f5;
}

.form-input:focus {
    outline: none;
    box-shadow: 0 0 8px rgba(0, 123, 255, 0.2);
}

.validation-message {
    font-size: 12px;
    margin-top: 5px;
    display: none;
}

.form-input:valid + .validation-message.success {
    display: block;
    color: #28a745;
}

.form-input:invalid + .validation-message.error {
    display: block;
    color: #dc3545;
}

.form-input:placeholder-shown {
    border-color: #e0e0e0;
    background-color: white;
}

.form-input:placeholder-shown + .validation-message {
    display: none;
}