:root {
    --color-yellow: #FBD953;
    --color-green: #BEB74D;
    --color-violet: #7F6FD9;
    --color-orange: #F25D3E;
    --color-beige: #f6f0e4;
    --color-brown: #522C17;
    --color-white: #ffffff;
}

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

html, body {
    height: 100%;
}

body {
    font-family: 'Rubik', sans-serif;
    color: var(--color-brown);
    background-color: var(--color-beige);
    display: table-cell;
    text-align: center;
    vertical-align: middle;
}
  
html {
    display: table;
    width: 100%;
    font-size: 15px;
}

header {
    display: flex;
    flex-flow: column;
    align-items: center;
}

#avatar {
    width: 180px;
    border-radius: 50%;
}

h1 {
    color: var(--color-brown);
    margin-top: 20px;
}

h2 {
    color: var(--color-yellow);
}

h3 {
    color: var(--color-violet);
}

h1, h2, h3, a {
    text-shadow: 0 1px rgb(0 0 0);
}

hr {
    width: 60%;
    margin: 30px 0;
    height: 1px;
    border: none;
    background: linear-gradient(to right, transparent, var(--color-green), transparent);
}

.nav-social-media {
    display: flex;
    justify-content: center;
}

.nav-social-media > li {
    margin: 0 15px;
}

.nav-social-media > li > a > img:hover{
    -webkit-transform: scale(1.3);
    -ms-transform: scale(1.3);
    transform: scale(1.3);
}

ul {
    list-style-type: none;
}

.section-title {
    margin: 20px 0;
}

.nav-links-useful > li > a{
    color: var(--color-brown);
    text-decoration: none;
}

.nav-links-useful > li > a:hover
{
    color: var(--color-green);
    text-decoration: underline; 
    font-size:120%;
}