diff --git a/Sources/AsciiDocRender/DocumentRender.swift b/Sources/AsciiDocRender/DocumentRender.swift
index 199381a..e3f4a3d 100644
--- a/Sources/AsciiDocRender/DocumentRender.swift
+++ b/Sources/AsciiDocRender/DocumentRender.swift
@@ -195,6 +195,9 @@ public final class DocumentRenderer {
             if let pageCSS = pageCSS(from: templateDocument) {
                 templateContext["pageCSS"] = pageCSS
             }
+            if let styleCSS = styleCSS(from: templateDocument) {
+                templateContext["styleCSS"] = styleCSS
+            }
             xadContext["template"] = templateContext
         }
 
@@ -941,6 +944,38 @@ public final class DocumentRenderer {
         return lines.joined(separator: "\n")
     }
 
+    private func styleCSS(from template: XADTemplateDocument) -> String? {
+        guard let styleValue = template.typedAttributes["style"] else { return nil }
+        guard case .dictionary(let style) = styleValue else { return nil }
+
+        var lines: [String] = [":root {"]
+
+        if case .dictionary(let font)? = style["font"] {
+            if let body = stringValue(font["body"]) { lines.append("  --xad-font-body: \"\(body)\";") }
+            if let heading = stringValue(font["heading"]) { lines.append("  --xad-font-heading: \"\(heading)\";") }
+            if let mono = stringValue(font["mono"]) { lines.append("  --xad-font-mono: \"\(mono)\";") }
+        }
+
+        if case .dictionary(let size)? = style["size"] {
+            if let body = stringValue(size["body"]) { lines.append("  --xad-size-body: \(body);") }
+            if let h1 = stringValue(size["h1"]) { lines.append("  --xad-size-h1: \(h1);") }
+            if let h2 = stringValue(size["h2"]) { lines.append("  --xad-size-h2: \(h2);") }
+        }
+
+        if case .dictionary(let line)? = style["line"] {
+            if let leading = stringValue(line["leading"]) { lines.append("  --xad-line-leading: \(leading);") }
+        }
+
+        if case .dictionary(let color)? = style["color"] {
+            if let text = stringValue(color["text"]) { lines.append("  --xad-color-text: \(text);") }
+            if let muted = stringValue(color["muted"]) { lines.append("  --xad-color-muted: \(muted);") }
+        }
+
+        guard lines.count > 1 else { return nil }
+        lines.append("}")
+        return lines.joined(separator: "\n")
+    }
+
     private func formatAuthor(_ author: AdocAuthor) -> String {
         if let fullname = author.fullname, !fullname.isEmpty {
             return appendAddress(fullname, address: author.address)
diff --git a/Templates/html5/document.stencil b/Templates/html5/document.stencil
index e941ded..f73ab85 100644
--- a/Templates/html5/document.stencil
+++ b/Templates/html5/document.stencil
@@ -15,6 +15,9 @@
       {% if xad and xad.template and xad.template.pageCSS %}
       {{ xad.template.pageCSS }}
       {% endif %}
+      {% if xad and xad.template and xad.template.styleCSS %}
+      {{ xad.template.styleCSS }}
+      {% endif %}
 
       :root {
         --surface: #ffffff;
@@ -27,6 +30,15 @@
         --accent-soft: rgba(37, 99, 235, 0.1);
         --shadow-soft: 0 10px 25px rgba(15, 23, 42, 0.08);
         --monospace: "SFMono-Regular", "Roboto Mono", ui-monospace, Menlo, Monaco, "Liberation Mono", monospace;
+        --xad-font-body: "Times New Roman";
+        --xad-font-heading: "Times New Roman";
+        --xad-font-mono: "SFMono-Regular", "Roboto Mono", ui-monospace, Menlo, Monaco, "Liberation Mono", monospace;
+        --xad-size-body: 11pt;
+        --xad-size-h1: 20pt;
+        --xad-size-h2: 14pt;
+        --xad-line-leading: 1.35;
+        --xad-color-text: #111827;
+        --xad-color-muted: #4b5563;
       }
 
       @media (prefers-color-scheme: dark) {
@@ -57,6 +69,20 @@
         line-height: 1.65;
       }
 
+      .xad-doc {
+        font-family: var(--xad-font-body, "Times New Roman");
+        font-size: var(--xad-size-body, 11pt);
+        line-height: var(--xad-line-leading, 1.35);
+        color: var(--xad-color-text, #111827);
+      }
+
+      .xad-doc h1, .xad-doc h2, .xad-doc h3, .xad-doc h4, .xad-doc h5, .xad-doc h6 {
+        font-family: var(--xad-font-heading, "Times New Roman");
+      }
+
+      .xad-doc h1 { font-size: var(--xad-size-h1, 20pt); }
+      .xad-doc h2 { font-size: var(--xad-size-h2, 14pt); }
+
       a {
         color: var(--accent);
         text-decoration: none;
@@ -107,6 +133,30 @@
         min-width: 0;
       }
 
+      .xad-flow[data-slot="title"] .doc-title p {
+        font-family: var(--xad-font-heading, "Times New Roman");
+        font-size: var(--xad-size-h1, 2.2rem);
+        font-weight: 700;
+        line-height: 1.1;
+        margin: 0;
+      }
+
+      .xad-flow[data-slot="authors"] .author p {
+        margin: 0.25rem 0;
+        color: var(--xad-color-muted, #4b5563);
+      }
+
+      .xad-flow[data-slot="abstract"] .block.paragraph {
+        background: var(--surface-muted);
+        border: 1px solid var(--border-soft);
+        border-radius: 12px;
+        padding: 1rem 1.25rem;
+      }
+
+      .xad-flow[data-slot="abstract"] .block.paragraph p {
+        margin: 0;
+      }
+
       .xad-grid {
         display: grid;
         grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
diff --git a/Templates/xad/default/template.adoc b/Templates/xad/default/template.adoc
index 8618b7f..d0c742f 100644
--- a/Templates/xad/default/template.adoc
+++ b/Templates/xad/default/template.adoc
@@ -1,5 +1,6 @@
 = Default Template
 :page.masters: {"default": {"size": "A4", "margins": {"top": "18mm", "right": "18mm", "bottom": "20mm", "left": "18mm"}, "duplex": false}}
+:style: {"font": {"body": "Libertinus Serif", "heading": "Libertinus Sans", "mono": "Iosevka"}, "size": {"body": "11pt", "h1": "20pt", "h2": "14pt"}, "line": {"leading": 1.35}, "color": {"text": "#111827", "muted": "#4b5563"}}
 
 [layout]
 ----
diff --git a/Templates/xad/double-column-explicit/template.adoc b/Templates/xad/double-column-explicit/template.adoc
index 653404d..6f565cd 100644
--- a/Templates/xad/double-column-explicit/template.adoc
+++ b/Templates/xad/double-column-explicit/template.adoc
@@ -1,5 +1,6 @@
 = Double Column Explicit Template
 :page.masters: {"default": {"size": "A4", "margins": {"top": "18mm", "right": "18mm", "bottom": "20mm", "left": "18mm"}, "duplex": false}}
+:style: {"font": {"body": "Libertinus Serif", "heading": "Libertinus Sans", "mono": "Iosevka"}, "size": {"body": "11pt", "h1": "20pt", "h2": "14pt"}, "line": {"leading": 1.35}, "color": {"text": "#111827", "muted": "#4b5563"}}
 
 [layout]
 ----
diff --git a/Templates/xad/double-column-flow/template.adoc b/Templates/xad/double-column-flow/template.adoc
index 75ef252..5e25c74 100644
--- a/Templates/xad/double-column-flow/template.adoc
+++ b/Templates/xad/double-column-flow/template.adoc
@@ -1,5 +1,6 @@
 = Double Column Flow Template
 :page.masters: {"default": {"size": "A4", "margins": {"top": "18mm", "right": "18mm", "bottom": "20mm", "left": "18mm"}, "duplex": false}}
+:style: {"font": {"body": "Libertinus Serif", "heading": "Libertinus Sans", "mono": "Iosevka"}, "size": {"body": "11pt", "h1": "20pt", "h2": "14pt"}, "line": {"leading": 1.35}, "color": {"text": "#111827", "muted": "#4b5563"}}
 
 [layout]
 ----
diff --git a/Templates/xad/trivial/template.adoc b/Templates/xad/trivial/template.adoc
index afb95cb..cf8846d 100644
--- a/Templates/xad/trivial/template.adoc
+++ b/Templates/xad/trivial/template.adoc
@@ -1,5 +1,12 @@
 = Trivial Template
-:page.masters: {"default": {"size": "A4", "margins": {"top": "18mm", "right": "18mm", "bottom": "20mm", "left": "18mm"}, "duplex": false}}
+:page.masters: {
+    default: {
+        size: "A4",
+        margins: { top: "18mm", right: "18mm", bottom": "20mm", left: "18mm"},
+        duplex: false
+    }
+}
+:style: {"font": {"body": "Libertinus Serif", "heading": "Libertinus Sans", "mono": "Iosevka"}, "size": {"body": "11pt", "h1": "20pt", "h2": "14pt"}, "line": {"leading": 1.35}, "color": {"text": "#111827", "muted": "#4b5563"}}
 
 [layout]
 ----