body
{
    font-size: 28px;
    padding: 0;
    margin: 0;
}

p
{
    background-color: yellow;
}

b
{
    height: 100px;
    display: inline-block;
}

.red-background
{
    background-color: red;
}

.color-white
{
    color: white;
}
.color-black
{
    color: black;
}

.box
{
    width: 97%;
    height: 100px;
    background-color: blue;
    color: white;
    border: 5px solid black;
    margin: 15px;
}

.block-box
{
    background: orange;
}

.inline-box
{
    display: inline;
}

.inline-block-box
{
    display: inline-block;
}

.padding-box
{
    padding: 10px;
}

.tercium-box
{
    width: 31%;
    height: 100px;
    margin: 0px;
    background: pink;
}