*{
    margin:0;
    padding:0;
    box-sizing: border-box;
}

body{
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    min-height: 10hv;
    background-color: aliceblue;
}

.leftbar{
    background-color: rgb(20, 41, 87);
    color: aliceblue;
    width: 250px;
    padding: 1rem;
}
 .leftbar a{
    color: aliceblue;
    display: block;
    text-decoration: none;
    margin-bottom: 1rem;
 }

 .leftbar h2{
    margin-bottom: 2rem;
 }

 .leftbar a :hover{
    text-decoration: underline;
 }

 .main{
    padding: 2rem;
    flex-grow: 1;
 }

    .cards{
        display: grid;
        grid-template-columns: repeat(auto-fit,minmax(200px,1fr));
        gap: 1rem;
     }

     .card{
        background-color: aqua;
        border-radius: 10px;
        padding: 1.5rem;
        box-shadow: 0 0 10px;;
     }

     .card h3{
        margin-bottom: 0.5rem;
     }

     table{
        width: 100%;
        border-collapse: collapse;
        margin-top: 25px;
     }

     table th, table td{
        border-bottom: 1px solid ;
        text-align:left ;
        padding: 10px;
     }

     table thead{
        background-color: darkgoldenrod;
     }