button.btn,
a.btn {
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: auto;
    min-height: 40px;
    padding: 12px 20px;

    border: 0;
    border-radius: 10px;

    font: inherit;
    line-height: 1.2;
    text-decoration: none;
    vertical-align: middle;
}

button.btn {
    appearance: none;
    cursor: pointer;
}

.btn i {
    margin-right: 7px;
}