diff --git a/src/index.styl b/src/index.styl
index c586c44..780a85d 100644
--- a/src/index.styl
+++ b/src/index.styl
@@ -1,4 +1,8 @@
+@import "reset-context";
+
 .switch {
+    reset-context();
+
     position: relative;
     display: inline-block;
     width: 48px;
diff --git a/src/reset-context.styl b/src/reset-context.styl
new file mode 100644
index 0000000..e5e055c
--- /dev/null
+++ b/src/reset-context.styl
@@ -0,0 +1,9 @@
+reset-context() {
+    // https://www.paulirish.com/2012/box-sizing-border-box-ftw/
+    box-sizing: border-box;
+    *, *:before, *:after {
+        box-sizing: inherit;
+    }
+
+    line-height: 20px;
+}