@media (min-width: 640px) {
    /* For mobile phones: */
    .row {
    display: flex;
    }
}
* {box-sizing: border-box;}
body {
    margin: 0;
	font-family: "Lucida Sans", sans-serif;
}
.header {
	overflow: hidden;
    background-color: #9933cc;
    color: #ffffff;
    padding: 1px;
}
.dropbtn {
	position: absolute;
	background-color: green;
	display: block;
	padding: 10px;
	font-size: 18px;
	border: none;
}
.header h3 {
	float: left;
	display: block;
	font-size: 18px;
	width: 100%;
}
.row {
    padding: 0px;
}
.menu {
    flex:1;
}
.content {
    flex:6;
}
.common {
    flex:1;
    height:100px;
}
.menu ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}
.menu li {
    padding: 4px;
    margin-bottom: 3px;
    background-color: #33b5e5;
    color: #ffffff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}
.menu li:hover {
    background-color: #0099cc;
}

.footer {
    background-color: #33b5e5;
    color: #ffffff;
    text-align: center;
    padding: 5px;
}
.b_line {
    border-bottom:5px solid black;
}
.main {
    font-size: 72px;
    text-align: center;
    border-spacing: 4px;
}
.inp_dig {
    background-color: #FFF0FF;
    border:1px solid #FFF8FF;
    padding: 0px;
    width:60px;
    height:100px;
}
.blink{
    border:1px solid rgb(255,255,51);
}
.pic {
    width:200px;
}
.big-btn{
	display: inline;
    font-size: 36px;
    background-color: #33b5e5;
    padding: 10px 15px;
	margin: 10px;
    vertical-align: middle;
	border: none;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    outline: none;
    color: #000000;
    border-radius: 10px;
    box-shadow:4px 5px 10px #202020;
}
.btn {
	display: inline;
    font-size:30px;
    background-color: #ff9447;
    padding: 5px 10px;
    margin:10px;
    vertical-align: middle;
	text-align: center;
	border: none;
    cursor: pointer;
    text-decoration: none;
    outline: none;
    color: #000000;
    border-radius: 5px;
    box-shadow:4px 5px 10px #202020;
}