body{
    margin:0;
    font-family:Arial,sans-serif;
    background:#f5f7fa;
}

.sidebar{
    width:250px;
    height:100vh;
    position:fixed;
    background:#1f2937;
    color:#fff;
}

.sidebar h2{
    text-align:center;
    padding:20px;
}

.sidebar ul{
    list-style:none;
    padding:0;
}

.sidebar ul li{
    padding:15px 20px;
}

.sidebar ul li a{
    color:#fff;
    text-decoration:none;
}

.main{
    margin-left:250px;
}

.navbar{
    background:#fff;
    padding:15px;
    box-shadow:0 1px 5px rgba(0,0,0,.1);
}

.content{
    padding:20px;
}

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:'Segoe UI',sans-serif;
}

body{
    background:#f4f6f9;
}

.wrapper{
    display:flex;
}

/* Sidebar */

.sidebar{
    width:250px;
    height:100vh;
    background:#111827;
    position:fixed;
    left:0;
    top:0;
    overflow-y:auto;
}

.logo{
    color:#fff;
    text-align:center;
    font-size:24px;
    font-weight:bold;
    padding:20px;
    border-bottom:1px solid #1f2937;
}

.menu{
    list-style:none;
}

.menu li{
    border-bottom:1px solid #1f2937;
}

.menu li a{
    display:block;
    color:#d1d5db;
    text-decoration:none;
    padding:15px 20px;
}

.menu li a:hover{
    background:#2563eb;
    color:#fff;
}

/* Main */

.main{
    margin-left:250px;
    width:100%;
}

/* Navbar */

.navbar{
    background:#fff;
    padding:15px 20px;
    box-shadow:0 2px 10px rgba(0,0,0,.05);
    display:flex;
    justify-content:space-between;
    align-items:center;
}

.navbar h3{
    color:#111827;
}

.user-info{
    color:#6b7280;
}

/* Content */

.content{
    padding:20px;
}

/* Cards */

.row{
    display:flex;
    flex-wrap:wrap;
    gap:20px;
}

.card{
    background:#fff;
    padding:20px;
    border-radius:10px;
    box-shadow:0 2px 10px rgba(0,0,0,.05);
    flex:1;
    min-width:220px;
}

.card-title{
    color:#6b7280;
    margin-bottom:10px;
}

.card-value{
    font-size:28px;
    font-weight:bold;
    color:#111827;
}

/* Tables */

.table{
    width:100%;
    background:#fff;
    border-collapse:collapse;
    margin-top:20px;
}

.table th{
    background:#2563eb;
    color:#fff;
    padding:12px;
}

.table td{
    padding:12px;
    border-bottom:1px solid #eee;
}

.table tr:hover{
    background:#f9fafb;
}

/* Buttons */

.btn{
    display:inline-block;
    padding:10px 15px;
    border:none;
    border-radius:5px;
    text-decoration:none;
    cursor:pointer;
}

.btn-primary{
    background:#2563eb;
    color:#fff;
}

.btn-success{
    background:#16a34a;
    color:#fff;
}

.btn-danger{
    background:#dc2626;
    color:#fff;
}

/* Footer */

.footer{
    margin-top:30px;
    background:#fff;
    text-align:center;
    padding:15px;
    color:#6b7280;
}