body {
    background-color: #f5f6fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.sidebar {
    min-height: 100vh;
    background: #1e293b;
    color: #fff;
}

.sidebar a {
    color: #cbd5e1;
    text-decoration: none;
    display: block;
    padding: 10px 15px;
    border-radius: 6px;
    margin-bottom: 5px;
}

.sidebar a:hover,
.sidebar a.active {
    background: #334155;
    color: #fff;
}

.content {
    padding: 25px;
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,.05);
}

.table th {
    background: #f1f5f9;
    font-weight: 600;
}