body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f6fa;
}

.sidebar {
    width: 250px;
    height: 100vh;
    background: #1e272e;
    position: fixed;
    color: white;
    padding: 20px;
}

.sidebar h2 {
    text-align: center;
}

.sidebar a {
    display: block;
    color: white;
    text-decoration: none;
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
}

.sidebar a:hover {
    background: #485460;
}

.content {
    margin-left: 270px;
    padding: 20px;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

input, button, select {
    padding: 10px;
    margin: 5px;
}

button {
    background: #0fbcf9;
    border: none;
    color: white;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background: #0984e3;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    border: 1px solid #ccc;
    padding: 10px;
}

th {
    background: #dfe6e9;
}