how to make my font size responsive?
<p>I'm trying to make some big title responsive.  I tried a few things such as: this <a href="https://css-tricks.com/viewport-sized-typography/" rel="nofollow">Link</a>. But it didn't work.</p>

<p>CSS</p>

<pre><code>body {
    margin-top: 50px; /* Required margin for .navbar-fixed-top. Remove if using .navbar-static-top. Change if height of navigationchanges. */  
}


#page-wrap {

  width: 760px;
  margin: 0 auto;
}

.title {
    font-family: Brush Script MT,cursive;
    font-size: 10vw;
    font-style: normal;
    font-variant: normal;
    font-weight: 500;

}

#welcome {
    @extend .title;   
}

#to {
    @extend .title;
    text-align: center;
    font-size: 50px;   
}

#mp{
    @extend .title;
    text-align: right;

}


.full { 
   background-image: url('../img/beach-bg1920-1080.jpg');
   background-repeat: no-repeat;
   background-attachment: fixed;
   background-position: center; 
   -webkit-background-size: cover;
   -moz-background-size: cover;
   background-size: cover;
   -o-background-size: cover;

}



/*******navbar elements *********/
.navbar-inner {
    background:transparent;
    border: solid#ffffff 2px;
}

.nav &gt; li &gt; a:focus, .nav &gt; li &gt; a:hover {
    text-decoration: none;
    background-color: $hover-color;
}
.navbar-nav &gt; li &gt; a {
    padding-top: 15px;
    padding-bottom: 15px;
    color: white;
}

.navbar &gt; .container .navbar-brand, .navbar &gt; .container-fluid .navbar-brand {
    margin-left: -15px;
    color: #ffffff;
}
.navbar-brand:focus, .navbar-brand:hover {
    text-decoration: none;
}

/*******navbar elements End *********/
</code></pre>

<p>HTML</p>

<pre><code>    &lt;div id="page-wrap"&gt;           
        &lt;h1 id="welcome"&gt;Welcome!&lt;/h1&gt;
        &lt;h2 id="to"&gt;to&lt;/h2&gt;
        &lt;h1 id="mp"&gt;My Portfolio!&lt;/h1&gt;
    &lt;/div&gt;  
</code></pre>

<p>You can't see the word "My portfolio".  i am trying to move everything to the left. in other words, I just want to make sure that this is going to look alright on mobile devices.  </p>