body {
    background: rgb(255, 3, 3);
    color: rgb(255, 255, 255);
    padding: 10px;
    font-family: arial;
}
#all-contents {
  max-width: 1650px;
    margin: auto;
}

/* navigation menu */
nav {
    background: rgb(0, 0, 0);
   margin: 0 auto;
    display: flex;
    padding: 10px;
}
h1 {
    display: flex;
    align-items: center;
    color: rgb(255, 255, 255);
    flex: 1;
    margin: 0;
}
#nav-ul {
    list-style-image: none;
}
.nav-li {
    display: inline-block;
    padding: 0 10px;
}
a {
    text-decoration: none;
    color: #ff0000;
}

/* main container area beneath menu */
main {
    background: rgb(70, 70, 70);
    display: flex;
}
.sidebar {
    margin-right: 0px;
    padding: 0px;
}
.sidebar-img {
    width: 300px;
}
.content {
    flex: 1;
    padding: 0px;
}

/* portfolio styles */
#interests {
    border: 4px silver ridge;
    padding: 8px;
    margin-left: 5px;
}
h2{
    margin: 0px;
    font-size:20px;
    background-image: url() ;
}
h3 {
    margin: 0px;
}
#spider {
    margin: auto;
    text-align: center;
    color:rgb(255, 3, 3);
}
         /* portfolio styles */
         .content h1 {
            color: black;
        }

        #portfolio {
            list-style-type: none;
            padding-left: 0;
        }

        #portfolio li {
            background: #fff;
            padding: 10px;
            border-radius: 10px;
            margin-bottom: 10px;
        }

        #portfolio li:hover {
            background: #eee;
        }

        #portfolio a {
            text-decoration: none;
            color: #454545;
        }
        #tiers li {
            background: #fff;
            padding: 10px;
            border-radius: 10px;
            margin-bottom: 10px;
        }
        .rotate {
            animation: rotation 1s infinite linear;
          }
          
          @keyframes rotation {
            from {
              transform: rotate(0deg);
            }
            to {
              transform: rotate(359deg);
            }
          }
          .rotate2 {
            animation: rotation 3.4s infinite linear;
          }
          
          @keyframes rotation {
            from {
              transform: rotate(0deg);
            }
            to {
              transform: rotate(359deg);
            }
          }
          * {box-sizing:border-box}