diff --git a/themes/ink/mail/org/team_invite.tmpl b/themes/ink/mail/org/team_invite.tmpl
index 2669387..8b84826 100644
--- a/themes/ink/mail/org/team_invite.tmpl
+++ b/themes/ink/mail/org/team_invite.tmpl
@@ -52,17 +52,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/repo/actions/workflow_run.tmpl b/themes/ink/mail/repo/actions/workflow_run.tmpl
index 27659bd..6460b76 100644
--- a/themes/ink/mail/repo/actions/workflow_run.tmpl
+++ b/themes/ink/mail/repo/actions/workflow_run.tmpl
@@ -54,17 +54,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/repo/collaborator.tmpl b/themes/ink/mail/repo/collaborator.tmpl
index f290f30..8462017 100644
--- a/themes/ink/mail/repo/collaborator.tmpl
+++ b/themes/ink/mail/repo/collaborator.tmpl
@@ -52,17 +52,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/repo/issue/assigned.tmpl b/themes/ink/mail/repo/issue/assigned.tmpl
index 991ac38..e14cb60 100644
--- a/themes/ink/mail/repo/issue/assigned.tmpl
+++ b/themes/ink/mail/repo/issue/assigned.tmpl
@@ -52,17 +52,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/repo/issue/default.tmpl b/themes/ink/mail/repo/issue/default.tmpl
index 7b3fc92..dc50865 100644
--- a/themes/ink/mail/repo/issue/default.tmpl
+++ b/themes/ink/mail/repo/issue/default.tmpl
@@ -62,17 +62,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/repo/release.tmpl b/themes/ink/mail/repo/release.tmpl
index 1506422..302170f 100644
--- a/themes/ink/mail/repo/release.tmpl
+++ b/themes/ink/mail/repo/release.tmpl
@@ -57,17 +57,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/repo/transfer.tmpl b/themes/ink/mail/repo/transfer.tmpl
index 2d34c47..7bd8c25 100644
--- a/themes/ink/mail/repo/transfer.tmpl
+++ b/themes/ink/mail/repo/transfer.tmpl
@@ -52,17 +52,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/user/auth/activate.tmpl b/themes/ink/mail/user/auth/activate.tmpl
index d33016f..443821d 100644
--- a/themes/ink/mail/user/auth/activate.tmpl
+++ b/themes/ink/mail/user/auth/activate.tmpl
@@ -52,17 +52,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/user/auth/activate_email.tmpl b/themes/ink/mail/user/auth/activate_email.tmpl
index fd29051..cfa5a37 100644
--- a/themes/ink/mail/user/auth/activate_email.tmpl
+++ b/themes/ink/mail/user/auth/activate_email.tmpl
@@ -52,17 +52,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/user/auth/register_notify.tmpl b/themes/ink/mail/user/auth/register_notify.tmpl
index a6a82ab..d2eae40 100644
--- a/themes/ink/mail/user/auth/register_notify.tmpl
+++ b/themes/ink/mail/user/auth/register_notify.tmpl
@@ -52,17 +52,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->
diff --git a/themes/ink/mail/user/auth/reset_passwd.tmpl b/themes/ink/mail/user/auth/reset_passwd.tmpl
index c3978c8..ae28745 100644
--- a/themes/ink/mail/user/auth/reset_passwd.tmpl
+++ b/themes/ink/mail/user/auth/reset_passwd.tmpl
@@ -52,17 +52,25 @@
 
     /* Responsive */
     @media only screen and (max-width:480px) {
+      /* Stack layout — convert table rows to blocks */
+      .email-wrap,.email-wrap tbody,.email-wrap tr{ display:block!important;width:100%!important }
+      .email-wrap td{ box-sizing:border-box!important }
       .email-header { padding-left:16px!important;padding-right:16px!important }
-      .email-card { width:100%!important;display:block!important;border-left:none!important;padding-left:28px!important;padding-right:28px!important;padding-top:0!important }
-      .email-sidebar { width:100%!important;display:block!important;padding:0 28px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
+      .email-card { width:100%!important;display:block!important;border-left:none!important;padding:0 16px 16px!important }
+      .email-sidebar { width:100%!important;display:block!important;padding:0 16px 16px!important;border-left:none!important;border-top:1px solid #ddd!important }
       .email-btn { display:block!important;width:auto!important;text-align:center!important }
       .email-footer { padding-left:16px!important;padding-right:16px!important }
+      /* Prevent content overflow */
+      .email-wrap,.email-wrap td,.email-wrap th{ word-break:break-word!important;overflow-wrap:break-word!important }
+      img{ max-width:100%!important;height:auto!important }
+      pre,code{ white-space:pre-wrap!important;word-break:break-all!important }
+      table{ max-width:100%!important }
     }
   </style>
 </head>
 
 <body style="margin:0;padding:0;background:#ede4d4;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;">
-  <center style="width:100%;table-layout:fixed;">
+  <center style="width:100%;">
     <table width="100%" cellpadding="0" cellspacing="0" border="0" class="email-wrap">
 
       <!-- Floating Title -->