<button>button</button>
    <button class="red">red</button>
    <button class="orange">orange</button>
    <button class="blue">blue</button>
    <button class="green">green</button>
    <button class="link">link</button>

    <button class="b-red bk-n">button</button>
    <button class="b-red">red</button>
    <button class="b-orange">orange</button>
    <button class="b-blue">blue</button>
    <button class="b-green">green</button>

<button disabled>disabled</button>

    <button class="circle">+</button>
    <button class="circle teal">+</button>

    <nav class="btn-group">
        <button>button</button>
        <button>button</button>
        <button>button</button>
    </nav>

<input type="text">
<input type="password" >

<input type="checkbox" id="switch1" class="switch"><label for="switch1"></label>

<input type="radio" id="test_radio1" name="ra"><label for="test_radio1">radio1</label>
<input type="radio" disabled id="test_radio3" name="ra"><label for="test_radio3">radio3</label>
<input type="radio" checked disabled id="test_radio4" name="ras"><label for="test_radio4">radio4</label>

<input id="test_checkbox1" type="checkbox"><label for="test_checkbox1">check1</label>
<input id="test_checkbox3" disabled type="checkbox"><label for="test_checkbox3">check3</label>
<input id="test_checkbox4" checked disabled type="checkbox"><label for="test_checkbox4">check4</label>