html {
            box-sizing: border-box
        }

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

        body {
            background-color: #ecf3f7;
            font-family: Roboto, sans-serif;
            font-weight: 400;
            height: 100%;
            line-height: 1.5;
            margin: 0 auto
        }

        body hr {
            opacity: 28%
        }

        header {
            background-color: #fff;
            height: 90px;
            width: 100%
        }

        main {
            background-color: #fff;
            border-bottom: 1px solid #cce0eb;
            margin: 20px auto 30px auto;
            max-width: 800px;
            padding: 16px;
            font-size: 17px;
            border-radius: 8px
        }

        main h1 {
            font-family: "Playfair Display";
            font-size: 2.8rem;
            letter-spacing: -0.05rem;
            margin-top: 0px;
            margin-bottom: 10px;
            font-weight: 500;
            line-height: 1.1;
        }

        main button {
            font-size: 24px !important
        }

        footer {
            background-color: #cce0eb;
            font-size: 0.65rem;
            padding: 75px 0px 100px;
            text-align: center;
        }

        footer ul {
            padding-left: 0px;
            margin-left: -5px;
            list-style: none;
        }

        footer li {
            display: inline-block;
            padding: 5px;
        }

        .advertisment {
            opacity: 49%;
            font-size: 0.75rem;
            margin: 0px;
            text-align: center
        }

        .logo {
            margin-left: auto;
            margin-right: auto;
            max-width: 800px;
            padding-left: 30px;
            padding-right: 30px;
        }

        /** media queries **/
        @media(max-width:800px) {
            main {
                overflow: hidden
            }
        }