[S] Style markdown figure

src/css/global.sass

@@ -178,22 +178,44 @@ html
     font-size: 1.5em
     margin-top: 1em
 
-  h1, h2
     line-height: 1.3
     margin-bottom: 0.25em
     padding: 0
 
+  h2
+    font-size: 1.3em
+
   h3
     font-size: 1.2em
 
   p
-    font-size: 0.9em
-    margin: 0.5em 0
+    font-size: 1em
+    margin: 0.7em 0
     line-height: 1.6
 
   p:last-child
     margin-bottom: 0
 
   li
-    font-size: 0.9em
+    font-size: 1em
     margin-bottom: 0.25em
+
+  figure
+    margin: 0
+
+  img
+    width: calc(100% + 20px)
+    margin-left: -10px
+    margin-right: -10px
+    border-radius: 10px
+    object-fit: cover
+    max-height: 500px
+
+  caption
+    display: flex
+    width: 100%
+    justify-content: center
+    align-items: center
+
+    font-size: 0.8em
+    color: $color-text-light