TMSWEB_ResponsiveGrid example. CSS

I am playing around with he sample and cannot see where the app picks up the CSS from?


.bg-webgreen {
    background-color: #00838F;
    font-family: 'Montserrat', sans-serif;
    color: #FFFFFF;

In the project HTML file, there is:

<link href="" rel="stylesheet"/>

The Unit1.html file contains

    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
    <title>TMS Web Project</title>
        <img src="" class="background-image">
        <div class="top-title top-title-small">
            <a href="" target="_blank" title="Visit tmssoftware">
                <img class="large" src="">
                <img class="small" src="">
        <div class="top-title top-title-small">
            <a href="" target="_blank" title="Visit TMS Web Core page">
                <div class="tms-panel-thumb">WEB</div>
                <div class="tms-thumb-text">TMS WEB Core</div>
        <div class="bg-webgreen top-title top-title-detail" id="title">Title</div>
        <div class="bg-webgreen top-title top-title-description">
            <tr><td class="icon">
            <i class="icon material-icons">info</i>
            <span id="description">Description</span>
    <div id="appcontent" class="appcontent">

Nothing in the index.html file.

What am I missing please ?

The index.html file as we deliver it in the install distribution has the link to the CSS file.