* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
}

body {
    font-family: sans-serif;
    font-size: 16px;
    line-height: 1.4;
    color: #232323;
}

.menu {
    list-style-type: none;
    padding-left: 0;
    margin-left: 0;
}

.menu a {
    text-decoration: none;
    color: #5757a0;
    display: inline-block;
    padding: 10px 20px;
    background-color: lavender;
    border-bottom: 5px solid #5757a0;
    width: 306px;
    text-align: center;
}

.menu li {
    display: inline;
}

ul {
    padding: 0 0 0 40px;
}

h1 {
    margin: 22px 0;
    font-size: 32px;
}
h2 {
    margin: 20px 0;
}

p {
    margin: 16px 0;
}

img:not(#browserIcon) {
    width: 700px;
}

iframe {
    width: 100%;
    height: 680px;
    margin: 20px 0;
}
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}