body {
    margin: 0;
    font-family: "Segoe UI", sans-serif;
    background-color: #0d1033;
    color: #fff;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #11142d;
    padding: 10px 20px;
}

header img {
    height: 40px;
}

header nav ul {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
}

header nav ul li {
    margin-right: 20px;
}

header nav ul li a {
    color: #fff;
    text-decoration: none;
}

button#logout {
    background-color: #4c3cff;
    color: #fff;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
}

main {
    padding: 20px;
}

.card {
    display: inline-block;
    background-color: #11142d;
    border-radius: 10px;
    padding: 20px;
    margin: 10px;
    width: 200px;
    text-align: center;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 10px;
    border-bottom: 1px solid #333;
    text-align: center;
}