diff --git a/weirsoe-theme.css b/weirsoe-theme.css
index aec1047..b72b9e0 100644
--- a/weirsoe-theme.css
+++ b/weirsoe-theme.css
@@ -100,6 +100,8 @@ body::before {
 }
 
 /* ---------- responsive container ---------- */
+/* width:100% + padding must not overflow on pages without a framework reset (Bulma/Tailwind already do this) */
+.wt-container, .wt-main, .wt-header, .wt-nav, .wt-footer, .wt-card, .wt-input, .wt-btn, .wt-pre { box-sizing: border-box; }
 /* Full width (with gutters) on small screens; a centred max-width column on
    larger ones. Use --wt-container / --modifier to control the breakpoint width. */
 .wt-container {