* {
    box-sizing: border-box;
}

body {
    margin: 2em 3em;
    font-family: sans-serif;
    font-size: 16px;
    line-height: 1.4;
}

input[type="text"],
input[type="number"],
select {
    margin: 0;
    padding: 0.2em 0.1em;
    border: 0.15em solid #bbb;
    border-radius: 0.3em;
    outline: none;
    background-color: #fff;
    color: #000;
    font-family: sans-serif;
    font-size: 1em;
    line-height: 1.4;
    transition: border-color 0.1s linear;
}

select {
    padding-top: 0.4em;
    padding-bottom: 0.4em;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
    border-color: #0060df;
}

input[type="text"] {
    width: 18em;
}

input[type="number"] {
    width: 6em;
}

button {
    margin: 0;
    padding: 0.4em 1em;
    border: 0.15em solid #0060df;
    border-radius: 0.3em;
    outline: none;
    background-color: #0060df;
    color: #eff6ff;
    font-family: sans-serif;
    font-size: 1.2em;
    line-height: 1.2;
    transition: color 0.1s linear, box-shadow 0.1s linear;
}

button:hover,
button:focus {
    color: #fff;
    box-shadow: 0 0.1em 1em #0061df60;
}

.form__error {
    display: block;
    font-size: 0.85em;
    color: #c00;
}