body {
    margin: 0;
    font-family: Arial;
    background: #f5f6fa;
}

.sidebar {
    width: 250px;
    height: 100vh;
    background: #fff;
    position: fixed;
    box-shadow: 2px 0 10px rgba(0,0,0,0.05);
}

.sidebar h2 {
    padding: 20px;
}

.sidebar a {
    display: block;
    padding: 15px 20px;
    text-decoration: none;
    color: #333;
}

.sidebar a:hover {
    background: #f0f0f0;
}

.content {
    margin-left: 260px;
    padding: 20px;
}

.card {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

input, select, button {
    padding: 10px;
    margin: 5px 0;
    width: 100%;
}

button {
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
}