html {
    box-sizing: border-box;
}

*,
*::after,
*::before {
    box-sizing: inherit;
}

body {
    margin: 0;
    font-family: 'Helvetica Neue', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', sans-serif;
}

.box {
    width: 500px;
    height: 100px;
    background-color: teal;
    margin-left: auto;
    margin-right: auto;
}

.container {
    width: 1230px;
    padding-left: 15px;
    padding-right: 15px;
    /* margin-left: auto;
    margin-right: auto; */
    margin: 0 auto;
}

.btn {
    display: inline-block;
    padding: 20px 40px;
    border: 2px solid black;
    border-radius: 3px;
    background-color: tomato;
    color: white;
    text-decoration: none;
}

.btn-icon {
    display: inline-block;
    height: 20px;
    width: 20px;
    margin-right: 6px;
    background-color: blue;
    vertical-align: bottom;
}