body {
    background-color: white;
}

footer > div {
    width: 870px;
    margin: auto;
}

hr {
    margin: 50px auto;
    width: 50%;
    border: 0;
    height: 1px;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0));
}

p {
    text-align: justify;
}

a:link {
    text-decoration: none;
    color: #256ad2;
}

a:visited {
    text-decoration: none;
    color: #256ad2;
}

a:hover {
    text-decoration: none;
    color: #87ceeb;
}

a:active {
    text-decoration: none;
    color: coral;
}

.default_font {
    font-family: 'Lato', sans-serif;
    color: #333333;
    font-size: 16px;
}

.section {
    width: 870px;
    margin: auto;
}

.section_title {
    font-size: 25px;
    margin-bottom: 16px;
}

.section_content {
    display: flex;
    justify-content: space-between;
}

#introduction {
    margin-top: 50px;
}

#intro_left {
    display: flex;
    flex-direction: column;
    width: 230px;
    justify-content: space-around;
}

#intro_right {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: fit-content;
}

#profile_pic {
    width: 100%;
    border-radius: 50%;
}

#button_links {
    display: flex;
    justify-content: space-around;
    font-size: 27px;
}

#button_links a:link {
    text-decoration: none;
    color: #333333;
}

#button_links a:visited {
    text-decoration: none;
    color: #333333;
}

#button_links a:hover {
    text-decoration: none;
    color: grey;
}

#resume_button_link {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#resume_txt {
    font-size: 11px;
    font-family: "Trebuchet MS", "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", sans-serif;
}

#my_name {
    font-size: 40px;
    text-align: center;
}

#intro_txt_container {
    width: 550px;
}

#projects_content {
    flex-direction: column;
    justify-content: space-between;
}

.project_item {
    display: flex;
    justify-content: space-between;
}

.project_thumbnail {
    display: flex;
    align-items: center;
    width: 150px;
}

.project_thumbnail img {
    width: 100%;
}

.project_description {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    width: 680px;
}

.project_name {
    font-size: 17px;
    font-weight:700;

}

#copyright {
    text-align: right;
    margin-bottom: 10px;
    font-size: 9px;
    color: grey;
}

#up_button_arrow {
    position: fixed;
    bottom: 50px;
    width: fit-content;
    right: 150px;
    font-size: 23px;
}

.hide {
    display: none;
}

#up_button_txt {
    position: fixed;
    bottom: 85px;
    right: 80px;
    
    width: 80px;
    height: 25px;
    background-color: #333333;
    border-radius: 15px;

    display: none;

    justify-content: center;
    align-items: center;

    font-family: "Trebuchet MS", "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", sans-serif;
    font-size: 12px;
    color: white;
}

#up_button_arrow:hover + .hide {
    display: flex;
    -webkit-animation: fadein 0.5s linear forwards;
    animation: fadein 0.5s linear;
}

@-webkit-keyframes fadein {
    0% { opacity: 0; }
    100% { opacity: 1; }
}
  
@keyframes fadein {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

#up_button_arrow a:link {
    text-decoration: none;
    color: grey;
}

#up_button_arrow a:link {
    text-decoration: none;
    color: grey;
}

#up_button_arrow a:visited {
    text-decoration: none;
    color: grey;
}

#up_button_arrow a:hover {
    text-decoration: none;
    color: #333333;
}