diff --git a/assets b/assets
new file mode 100644
index 0000000..65c30c6
--- /dev/null
+++ b/assets
@@ -0,0 +1,113 @@
+@import url("https://fonts.googleapis.com/css?family=Inconsolata|Inter&display=swap");
+
+body{
+    margin:40px auto;
+    max-width:900px;
+    line-height:1.6;
+    font-size:16px;
+    background:#fffff4;
+    color:#3a1616;
+    padding:0 10px;
+    font-family:"Inter", sans-serif
+}
+
+input{
+    padding:10px 16px;
+    margin:2px 0;
+    box-sizing:border-box;
+    border:2px solid #dabebe;
+    border-radius:6px;
+    background:#fffff4;
+    color:#3a1616;
+    font-size:16px;
+    -webkit-transition:0.5s;
+    transition:0.5s;
+    outline:none
+}
+
+input:focus{
+    border:2px solid #3a1616
+}
+
+.button{
+    background-color:#fffff4;
+    border:none;
+    color:black;
+    padding:6px 14px;
+    text-align:center;
+    text-decoration:none;
+    display:inline-block;
+    font-size:16px;
+    margin:4px 2px;
+    transition-duration:0.4s;
+    cursor:pointer;
+    border:2px solid #3a1616;
+    border-radius:6px
+}
+
+.button:hover{
+    background-color:#3a1616;
+    color:white
+}
+
+.isa_error,.isa_info,.isa_success,.isa_warning{
+    width:90%;margin:10px 0;
+    padding:12px
+}
+
+.isa_info{
+    color:#00529B;
+    background-color:#BDE5F8
+}
+
+.isa_success{
+    color:#4F8A10;
+    background-color:#DFF2BF
+}
+
+.isa_warning{
+    color:#9F6000;
+    background-color:#FEEFB3
+}
+
+.isa_error{
+    color:#D8000C;
+    background-color:#FFD2D2
+}
+
+h1,h2,h3{
+    line-height:1.2;
+    font-family:"Inter", sans-serif
+}
+
+img{
+    max-width:750px;
+    border-radius:10px
+}
+
+a{
+    cursor:pointer;
+    color:#217ab7;
+    line-height:inherit
+}
+
+a:hover{
+    color:white;
+    background-color:#3297d3
+}
+
+a:visited{
+    color:#43458b;
+    border-color:#43458b}
+
+a:visited:hover{
+    color:white;
+    background-color:#9251ac
+}
+
+pre{
+    font-family:"Inconsolata", monospace
+}::selection{
+    color:white;
+    background:#ff4081
+}