Update style for newsletter

static/css/markdown.css

@@ -0,0 +1,98 @@
+.prose {
+    color: #374151;
+    max-width: none;
+}
+.prose p {
+    margin-top: 1.25em;
+    margin-bottom: 1.25em;
+}
+.prose a {
+    color: #2563eb;
+    text-decoration: underline;
+}
+.prose strong {
+    font-weight: 600;
+}
+.prose ul {
+    margin-top: 1.25em;
+    margin-bottom: 1.25em;
+    list-style-type: disc;
+    padding-left: 1.625em;
+}
+.prose ol {
+    margin-top: 1.25em;
+    margin-bottom: 1.25em;
+    list-style-type: decimal;
+    padding-left: 1.625em;
+}
+.prose h1 {
+    font-size: 2.25em;
+    margin-top: 0;
+    margin-bottom: 0.8888889em;
+    line-height: 1.1111111;
+    font-weight: 600;
+}
+.prose h2 {
+    font-size: 1.5em;
+    margin-top: 2em;
+    margin-bottom: 1em;
+    line-height: 1.3333333;
+    font-weight: 600;
+}
+.prose h3 {
+    font-size: 1.25em;
+    margin-top: 1.6em;
+    margin-bottom: 0.6em;
+    line-height: 1.6;
+    font-weight: 600;
+}
+.prose img {
+    margin-top: 2em;
+    margin-bottom: 2em;
+}
+.prose code {
+    color: #111827;
+    font-weight: 600;
+    background-color: #f3f4f6;
+    padding: 0.2em 0.4em;
+    border-radius: 0.375rem;
+    font-size: 0.875em;
+}
+.prose pre {
+    color: #e5e7eb;
+    background-color: #1f2937;
+    overflow-x: auto;
+    font-size: 0.875em;
+    line-height: 1.7142857;
+    margin-top: 1.7142857em;
+    margin-bottom: 1.7142857em;
+    border-radius: 0.375rem;
+    padding: 1em;
+}
+.prose pre code {
+    background-color: transparent;
+    color: inherit;
+    padding: 0;
+}
+.prose blockquote {
+    font-style: italic;
+    border-left: 4px solid #e5e7eb;
+    padding-left: 1em;
+    margin: 1.25em 0;
+}
+.prose table {
+    width: 100%;
+    border-collapse: collapse;
+    margin: 2em 0;
+}
+.prose table th {
+    background-color: #f3f4f6;
+    font-weight: 600;
+    text-align: left;
+    padding: 0.5em;
+    border: 1px solid #e5e7eb;
+}
+.prose table td {
+    padding: 0.5em;
+    border: 1px solid #e5e7eb;
+}