body {
    background-color: lightgray;
}


* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    height: 100%;
    background-color: #ededed;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
html {
    -webkit-text-size-adjust: 100%;
}
body {
    min-width: 320px;
}
button,
input,
select,
textarea {
    font: inherit;
}
img,
svg {
    max-width: 100%;
}