diff --git a/src/baby_monitor/static/diapers.html b/src/baby_monitor/static/diapers.html
index 603b37a..e760e59 100644
--- a/src/baby_monitor/static/diapers.html
+++ b/src/baby_monitor/static/diapers.html
@@ -5,41 +5,11 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Diapers - Baby Monitor</title>
     <link rel="stylesheet" href="/menu.css" />
+    <link rel="stylesheet" href="/styles.css" />
     <style>
-      * {
-        margin: 0;
-        padding: 0;
-        box-sizing: border-box;
-      }
-
+      /* Page-specific overrides */
       body {
-        font-family:
-          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
-          Cantarell, sans-serif;
         background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
-        min-height: 100vh;
-        padding: 20px;
-      }
-
-      .container {
-        background: white;
-        border-radius: 12px;
-        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
-        padding: 40px;
-        max-width: 1000px;
-        margin: 0 auto;
-      }
-
-      h1 {
-        color: #333;
-        margin-bottom: 10px;
-        font-size: 28px;
-      }
-
-      .subtitle {
-        color: #666;
-        margin-bottom: 30px;
-        font-size: 14px;
       }
 
       .button {
diff --git a/src/baby_monitor/static/feedings.html b/src/baby_monitor/static/feedings.html
index cd084a3..8a4e9f0 100644
--- a/src/baby_monitor/static/feedings.html
+++ b/src/baby_monitor/static/feedings.html
@@ -5,43 +5,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Feedings - Baby Monitor</title>
     <link rel="stylesheet" href="/menu.css" />
+    <link rel="stylesheet" href="/styles.css" />
     <style>
-      * {
-        margin: 0;
-        padding: 0;
-        box-sizing: border-box;
-      }
-
-      body {
-        font-family:
-          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
-          Cantarell, sans-serif;
-        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-        min-height: 100vh;
-        padding: 20px;
-      }
-
-      .container {
-        background: white;
-        border-radius: 12px;
-        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
-        padding: 40px;
-        max-width: 1000px;
-        margin: 0 auto;
-      }
-
-      h1 {
-        color: #333;
-        margin-bottom: 10px;
-        font-size: 28px;
-      }
-
-      .subtitle {
-        color: #666;
-        margin-bottom: 30px;
-        font-size: 14px;
-      }
-
+      /* Page-specific styles */
       .button {
         background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
         color: white;
diff --git a/src/baby_monitor/static/index.html b/src/baby_monitor/static/index.html
index 53df444..8853bbf 100644
--- a/src/baby_monitor/static/index.html
+++ b/src/baby_monitor/static/index.html
@@ -5,29 +5,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Baby Monitor</title>
     <link rel="stylesheet" href="/menu.css" />
+    <link rel="stylesheet" href="/styles.css" />
     <style>
-      body {
-        font-family: Arial, sans-serif;
-        max-width: 800px;
-        margin: 2rem auto;
-        padding: 0 1rem;
-        background-color: #f0f0f0;
-      }
-      .container {
-        background: white;
-        padding: 2rem;
-        border-radius: 8px;
-        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
-      }
-      h1 {
-        color: #333;
-        margin-bottom: 1rem;
-      }
-      .greeting {
-        color: #666;
-        font-size: 1.1rem;
-        margin-bottom: 2rem;
-      }
+      /* Page-specific styles */
       button {
         padding: 0.75rem 1.5rem;
         background-color: #dc3545;
@@ -47,13 +27,6 @@
       .admin-button:hover {
         background-color: #5568d3;
       }
-      .hidden {
-        display: none;
-      }
-      .loading {
-        text-align: center;
-        padding: 2rem;
-      }
       .feeding-button {
         width: 100%;
         padding: 2rem;
diff --git a/src/baby_monitor/static/settings.html b/src/baby_monitor/static/settings.html
index cae5bc2..e51385c 100644
--- a/src/baby_monitor/static/settings.html
+++ b/src/baby_monitor/static/settings.html
@@ -5,41 +5,11 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Settings - Baby Monitor</title>
     <link rel="stylesheet" href="/menu.css" />
+    <link rel="stylesheet" href="/styles.css" />
     <style>
-      * {
-        margin: 0;
-        padding: 0;
-        box-sizing: border-box;
-      }
-
-      body {
-        font-family:
-          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
-          Cantarell, sans-serif;
-        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-        min-height: 100vh;
-        padding: 20px;
-      }
-
+      /* Page-specific overrides */
       .container {
-        background: white;
-        border-radius: 12px;
-        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
-        padding: 40px;
         max-width: 800px;
-        margin: 0 auto;
-      }
-
-      h1 {
-        color: #333;
-        margin-bottom: 10px;
-        font-size: 28px;
-      }
-
-      .subtitle {
-        color: #666;
-        margin-bottom: 30px;
-        font-size: 14px;
       }
 
       .section {
diff --git a/src/baby_monitor/static/sleep.html b/src/baby_monitor/static/sleep.html
index adae5fc..8e491a1 100644
--- a/src/baby_monitor/static/sleep.html
+++ b/src/baby_monitor/static/sleep.html
@@ -5,41 +5,11 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Sleep - Baby Monitor</title>
     <link rel="stylesheet" href="/menu.css" />
+    <link rel="stylesheet" href="/styles.css" />
     <style>
-      * {
-        margin: 0;
-        padding: 0;
-        box-sizing: border-box;
-      }
-
+      /* Page-specific overrides */
       body {
-        font-family:
-          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
-          Cantarell, sans-serif;
         background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
-        min-height: 100vh;
-        padding: 20px;
-      }
-
-      .container {
-        background: white;
-        border-radius: 12px;
-        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
-        padding: 40px;
-        max-width: 1000px;
-        margin: 0 auto;
-      }
-
-      h1 {
-        color: #333;
-        margin-bottom: 10px;
-        font-size: 28px;
-      }
-
-      .subtitle {
-        color: #666;
-        margin-bottom: 30px;
-        font-size: 14px;
       }
 
       .button {
diff --git a/src/baby_monitor/static/styles.css b/src/baby_monitor/static/styles.css
new file mode 100644
index 0000000..20c5235
--- /dev/null
+++ b/src/baby_monitor/static/styles.css
@@ -0,0 +1,89 @@
+/* Common styles for Baby Monitor app */
+
+/* CSS Reset */
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+/* Body styling */
+body {
+  font-family:
+    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
+    Cantarell, sans-serif;
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  min-height: 100vh;
+  padding: 20px;
+}
+
+/* Main container */
+.container {
+  background: white;
+  border-radius: 12px;
+  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
+  padding: 40px;
+  max-width: 1000px;
+  margin: 0 auto;
+}
+
+/* Typography */
+h1 {
+  color: #333;
+  margin-bottom: 10px;
+  font-size: 28px;
+}
+
+.subtitle {
+  color: #666;
+  margin-bottom: 30px;
+  font-size: 14px;
+}
+
+/* Common button styles */
+.button {
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  color: white;
+  border: none;
+  padding: 12px 24px;
+  border-radius: 6px;
+  cursor: pointer;
+  font-size: 14px;
+  font-weight: 500;
+  transition: all 0.3s;
+  margin-right: 8px;
+  margin-bottom: 8px;
+}
+
+.button:hover {
+  transform: translateY(-2px);
+  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
+}
+
+.button.secondary {
+  background: #6c757d;
+}
+
+.button.secondary:hover {
+  background: #5a6268;
+}
+
+.button.danger {
+  background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
+}
+
+.button.danger:hover {
+  box-shadow: 0 4px 12px rgba(220, 53, 69, 0.4);
+}
+
+/* Loading state */
+.loading {
+  text-align: center;
+  padding: 40px;
+  color: #666;
+}
+
+/* Hidden utility class */
+.hidden {
+  display: none;
+}