added responsive slides

Author: mimnets

_tabs/books.md

@@ -12,10 +12,10 @@ order: 5
 4. [OxFord-English-Grammar](https://docs.google.com/presentation/d/12JMm7dvuOaTzP561IdGnr0k_R94Cfxxar1Ud4_SmDQY/edit?usp=sharing){:target="_blank" rel="noopener"}
 5. [Slides](/assets/books/slides/1.html){:target="_blank" rel="noopener"}
 
-
+## Oxford Grammar Book
 <iframe src="https://docs.google.com/presentation/d/1jY_sFURS3q4MwhOMcQ8yFgR1jxC2vSCrRhlVHkbsFDg/embed?start=true&loop=true&delayms=3000" 
         frameborder="0" 
-        width="400px" 
+        width="380px" 
         height="600px" 
         allowfullscreen="true" 
         mozallowfullscreen="true"