header {
                	background: url("https://www.transparenttextures.com/patterns/gun-metal.png"), linear-gradient(134deg, #111 0%, #111 90%, orangered 91%, orangered 100%);
                    padding: 7px;
                    border-radius: 30px 30px 0px 0px ;
                }
                
                header h1 {letter-spacing: -8px; font-style: italic; font-size: 80px;}
                
                .container {
                	background: #111;
                    margin: auto; width: 49vw;
                    font-family: sans-serif;
                    color: white;
                    border-radius: 30px;
                    box-shadow: 3px 3px 4px rgba(0,0,0,0.3), -3px 3px 4px rgba(0,0,0,0.3), -3px -3px 4px rgba(0,0,0,0.3), 3px -3px 4px rgba(0,0,0,0.3);
                }
                
                h1,h2,h3,h4,h5,h6 {padding: 0; margin: 0;}
                
                .subcontainer {
                	display: flex;
                    justify-content: center;
                }
                .sidebar {width: 20%; box-sizing: border-box; padding: 7px; background: linear-gradient(to right, #aaa, #111);}
                .main-content {width: 80%; box-sizing: border-box; padding: 7px; color: white;}
                
                footer {border-radius: 0px 0px 30px 30px; text-align: center; background: url("https://www.transparenttextures.com/patterns/gun-metal.png"), orangered;}
                
                .sidebar a {
                    padding: 7px;
                    background: url("https://www.transparenttextures.com/patterns/carbon-fibre-big.png"), linear-gradient(134deg, #111 0%, #aaa 90%, orangered 91%, orangered 100%);
                    
                    color: white;
                    text-decoration: none;
                    display: block;
                    text-align: center;
                    text-transform: lowercase;
                    font-weight: bold;
                    letter-spacing: -1px;
                    font-style: italic;
                    margin-bottom: 7px;
                    transition: 0.2s all ease-in-out;
                    border-radius: 3px;
                    box-shadow: 3px 3px 4px rgba(0,0,0,0.3), -3px 3px 4px rgba(0,0,0,0.3), -3px -3px 4px rgba(0,0,0,0.3), 3px -3px 4px rgba(0,0,0,0.3);
                }
                
                .sidebar a:hover {
                  color: red;
                  transform: translateY(2px);
                  box-shadow: 1px 1px 1px rgba(0,0,0,0.3), -1px 1px 1px rgba(0,0,0,0.3), -1px -1px 1px rgba(0,0,0,0.3), 1px -1px 1px rgba(0,0,0,0.3);
                }
                
                .sidebar a:focus {
                  color: red;
                  transform: translateY(3px);
                  box-shadow: 1px 1px 1px rgba(0,0,0,0.3), -1px 1px 1px rgba(0,0,0,0.3), -1px -1px 1px rgba(0,0,0,0.3), 1px -1px 1px rgba(0,0,0,0.3);
                  outline: none;
                }
                
                .sidebar h3 {
                  margin-top: 7px;
                  padding-top: 7px;
                }
                
                .sidebar h3:nth-of-type(1) {
                  border-top: none;
                  margin-top: 0;
                  padding-top: 0;
                }
                
                a {color: orangered; text-decoration: none;}
                
                .main-content h2 {
                  text-transform: lowercase;
                    font-weight: bold;
                    letter-spacing: -1px;
                    font-style: italic;
                }
                
                body {
                  background: url("https://frutigeraeroarchive.org/images/wallpapers/vectordelia/vectordelia_89.jpg"); background-size: cover;
                }