*{
    margin:0px;
}
body{
    margin:0px;
    padding:0px;
    background-color: lightgray;
    font-family: sans-serif;
    box-sizing: border-box;
}
h1{
    margin:20px;
    
}
P{
    margin:10px;
    font-family: sans-serif;
}
header {
    text-align: center;
    font-family: sans-serif;
    color:black;
}

 ul{
    list-style-type:none;
    margin:0px ;
    padding:0px;
    background-color: #333333;
    overflow: hidden;
}
 li a {
    float:left;
}
ul li a{
    display: block;
    color:white;
    text-align: center;
    padding:14px 16px;
    text-decoration: none;
}
ul li a:hover{
    background-color: #111111;
}
ul li a.active{
    background-color: #f0f0f0f0;
}
.container{
    display:flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-top:40px;
}
.card{
    width:325px;
    background-color: #f0f0f0f0;
    border-radius: 10px;
    box-shadow: 0px 2px 4px black;
    margin:20px;
}
.card img{
    width:100%;
}

.content h3{
    font-size: 25px;
    margin-bottom:8px;
}
content p{
    color: #fff;
    font-size: 15px;
    line-height: 1.3;
}
.content .hello{
    display: inline-block;
    padding:8px 14px;
    background-color: #333;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 16px;
    color:#fff;
}
footer{
    margin-top: 15px;
    background-color:grey;
    padding:20px;
}
.content .hello{
    margin-bottom: 20px;
    margin-left:85px ;
}
.hello:hover{
    box-shadow: 1px 3px 6px rgba(0,0,255,0.5);
}
.content:hover{
     box-shadow: 2px 6px 10px rgba(0,0,255,0.5);
}

a{
    text-decoration: none;
    color:#111111;
}