body {
    margin: 0;
    padding: 0;
    background:white;
    background-size: cover;
    background-position: center;
    font-family: sans-serif;
}

.top-panel {
    display: flex;
    position: relative;
    margin-top: 20px;
}

.top-panel .back-btn {
    width: 100px;
    height: 35px;
    position: fixed;
    top: 10px;
    left: 10px;
    background-color: white;
    cursor: pointer;
    border: 1px solid lightgray;
    border-radius: 4px;
}

.top-panel h1 {
    display: flex;
    justify-content: center;
    color: #333;
    font-size: 26px;
    margin-top: 50px;
}

.orders-panel {
    width: 300px;
}