.block{
    margin-top: 10px;
    margin-right: 20px;
    margin-bottom: 30px;
    margin-left: 10px;
    margin: 10px 10px 10px 10px;
    padding: 5px 7px; 
    border: 1px solid #000;
    background: #ddd;  
    background-repeat: no-repeat;
    border-bottom-width: 4px;
    border-style: solid;
    border-top-color: darkblue;
    border-left-style: dashed;
    border-bottom-style: dotted;
    box-sizing: border-box;
    overflow: hidden; 
}

.block h1{
    font-weight: 700;
    font-size: 36px;
    padding: 15px;
}

.block p{
    font-size: 15px;
    line-height: 1.3;
    box-sizing: content;
}

p{
    padding: 10px 15px 20px; 
    border-top-color: darkblue;
    border-width: 1px;
    border-style: double;
}

#overflow{
    max-height: 100px;
    overflow-y: auto;
    border-top-color: darkblue;
    border-width: 1px;
    border-style: inset;
    padding: 10px;
    border-spacing: 20px;
}

h2{
    font-size: 25px;
    text-align: center;
    padding: 10px;
}

.left{
    width: 20%;
    float: left;
}

.right{
    width: 20%;
    float: right;
}

.wrapper{
    width: 1170px;
    margin: 30px auto;
}

.clear{
    clear: both;
}

.wrapper:after {
    content: "";
    display: table;
    clear: both;
}

.clearfix:after{
    content: "";
    clear: both;
}

#divclearfix{
    align-content: center;
    border-style: dotted;
    border-width: 1px;
    width: 500px;
    margin: 50px auto;
    padding: 10px;
    margin-top: 10px;
}

.table{
    display:table;
    margin: auto;
}

.left-2{
    display: table-cell;
    width: 400px;
    background: #ddd;
}

.right-2{
    display: table-cell;
    width: 500px;
    background: #ccc;
}