2. Создаем CSS файл

---

body {
    box-sizing: border-box;
    font-family: "Nata Sans", sans-serif;
    margin: 0;
    padding: 0;
    background-color: #acd9f3;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
}

.form {
    border: 2px solid #fff;
    width: 600px;
    border-radius: 30px;
    padding: 40px;
    text-align: center;
}

.form-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

input, textarea, select {
    padding: 21px 28px;
    border-radius: 20px;
    margin: 7px 0 21px 0;
    background-color: #ffffff;
    font-size: 20px;
    border: 0;
    width: calc(100% - 54px);
    font-family: "Nata Sans", sans-serif;
}

select {
    width: 100%;
}

textarea {
    height: 100px;
}

button {
    background-color: #262626;
    color: #fff;
    border-radius: 20px;
    padding: 21px 28px;
    font-size: 20px;
    display: inline-block;
    margin-bottom: 20px;
    cursor: pointer;
}