diff --git a/certified.svg b/assets/certified.svg
similarity index 100%
rename from certified.svg
rename to assets/certified.svg
diff --git a/css/style.css b/css/style.css
new file mode 100644
index 0000000..c38b07d
--- /dev/null
+++ b/css/style.css
@@ -0,0 +1,48 @@
+body {
+ max-width: 800px;
+ margin: 0 auto;
+ font: 11pt monospace;
+ padding: 0 1rem;
+}
+
+ul li {
+ margin: 0.5rem 0;
+}
+
+.muted {
+ color: grey;
+}
+
+pre {
+ padding-left: 1rem;
+ max-width: 100%;
+ overflow-x: auto;
+}
+
+h2 a {
+ text-decoration: none;
+ color: black;
+}
+
+.breakdown {
+ display: flex;
+ justify-content: space-between;
+}
+
+@media(max-width: 720px) {
+ .breakdown {
+ display: block;
+ }
+ .breakdown span {
+ display: block;
+ }
+}
+
+.breakdown span {
+ padding: 0.5rem;
+}
+
+.green { background-color: rgba(0, 200, 0, 0.5); }
+.green::before { content: '✓ '; }
+.red { background-color: rgba(255, 50, 50, 0.5); }
+.red::before { content: '✗ '; }
diff --git a/es/certified.svg b/es/certified.svg
deleted file mode 100644
index cf09a50..0000000
--- a/es/certified.svg
+++ /dev/null
@@ -1 +0,0 @@
-
\ No newline at end of file
diff --git a/es/index.html b/es/index.html
index eaa12e2..c2c1912 100644
--- a/es/index.html
+++ b/es/index.html
@@ -4,56 +4,7 @@
Usa correo en texto plano
-
+
Usa correo en texto plano
@@ -102,7 +53,7 @@
>Pruébala!
diff --git a/index.html b/index.html
index ec52198..8af16c9 100644
--- a/index.html
+++ b/index.html
@@ -4,56 +4,7 @@
Use plaintext email
-
+
Use plaintext email
@@ -98,7 +49,7 @@
try it today!