body{
    margin:0;
    background:#eef2f6;
    font-family:Arial, Helvetica, sans-serif;
}

.sidebar{
    position:fixed;
    top:0;
    left:0;
    width:250px;
    height:100vh;
    background:#1d3557;
    overflow:auto;
    color:#fff;
    padding:20px;
}

.sidebar h3{
    text-align:center;
    margin-bottom:20px;
    font-weight:bold;
}

.sidebar hr{
    border-color:#355c7d;
}

.sidebar a{
    display:block;
    color:#ffffff;
    text-decoration:none;
    padding:12px;
    margin-bottom:6px;
    border-radius:8px;
    transition:0.2s;
}

.sidebar a:hover{
    background:#457b9d;
    color:#fff;
}

.content{
    margin-left:270px;
    padding:30px;
}

.card{
    border:none;
    border-radius:12px;
    box-shadow:0 3px 10px rgba(0,0,0,.15);
}