---

body {
    font-family: Arial, sans-serif;
    margin: 30px;
}

form {
    max-width: 400px;
}

div {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input, textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

/* Фокус */
input:focus, textarea:focus {
    outline: none;
    border-color: #007bff;
}

/* Валидация */
input:invalid, textarea:invalid {
    border-color: red;
}

input:valid, textarea:valid {
    border-color: green;
}

/* Кнопка */
button {
    padding: 10px 15px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

button:active {
    transform: scale(0.95);
}