body {
    margin: 0;
    font-family: Arial;
}

.navbar {
    background: #333;
    color: white;
    padding: 15px;
}

.sidebar {
    width: 200px;
    height: 100vh;
    background: #f4f4f4;
    float: left;
    padding: 20px;
}

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

.sidebar ul li {
    margin: 15px 0;
}

.sidebar ul li a {
    text-decoration: none;
    color: #333;
}

.content {
    margin-left: 220px;
    padding: 30px;
}

.stats {
    display: flex;
    gap: 20px;
}

.card {
    background: #eee;
    padding: 20px;
    width: 200px;
    text-align: center;
}

.upload-box {
    border: 2px dashed #999;
    padding: 40px;
    width: 400px;
    text-align: center;
}