/* CSS Resets */
h1, h2, h3, h4, p, nav ul {
    padding: 0;
    margin: 0;
}
nav ul {
    list-style-type: none;
}
img { max-width: 100%; display: block; }
* { box-sizing: border-box;}

/* end Resets */

body {
    color: #6D6F72;
    padding: 0 20px;
    background-color: #FDFDFE;
    margin-top: 70px;
    font-family: 'Times New Roman', Times, serif;

}


.tab {
    float: left;
    box-sizing: border-box;
    height: 50px;
    width: 1000px;
    border-bottom: 2px solid #6D6F72;
    background-color: #F6F7F8;
    border-radius: 10px 10px 0px 0px;
    
}

.rectangle {
    float: left;

    height: 30px;
    width: 880px;
    background-color: #FFFFFF;
    margin: 10px 0px 5px 10px;
    border: 2px solid #D7DADD;
    border-radius: 5px;


}

.circle {
    float: left;
    height: 20px;
    width: 20px;
    background-color: #FFFFFF;
    margin: 15px 0px 5px 10px;
    border: 2px solid #D7DADD;
    border-radius: 100px;
}

header, footer {
    margin: 20px;
}

header {
    border-bottom: 2px solid #6D6F72;
}

footer {
    border-top: 2px solid #6D6F72;
}

main {
    padding-top: 20px;
    padding-left: 20px;
}

.container {
    max-width: 1000px;
    border: 2px solid #6D6F72;
    border-radius: 10px;
    background-color: #FFFFFF;
    box-shadow: 10px 10px #dadada;
}

h1, h2 {
    margin-bottom: .5em;
}

p {
    line-height: 1.4em;
    margin-bottom: 1em;
    margin-top: 1em;
}

a {
    text-decoration: none;
    font-weight: bold;
    color:cornflowerblue;
}

ul li {
    margin-bottom: 1em;
}

img {
    margin-bottom: 20px;
}

aside {
    background-color: aliceblue;
    padding: 20px;
    margin-right: 20px;
}

aside img {
    border-radius: 50%;
    margin-left: auto;
    margin-right: auto;
    width: 150px;
}

@media only screen and (min-width: 600px) {
    .container{ 
        display: flex;
        flex-wrap: wrap;
    }
    header, footer {
        width: 100%;
    }
    main { flex: 2; }
    aside { flex: 1; }
}

@media only screen and (min-width: 800px) {
    .container{ margin: auto; }
    main { display: flex;}
    main div { flex: 1; }
}