body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    text-align: center;
    font-family: Arial, sans-serif;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    border: 1px solid black;
    display: block;
    margin: auto;
    cursor: grab;
}

.hidden {
    display: none;
}

#adminButton {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 10px;
    background: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    z-index: 1000;
}

#adminHeader {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background: #282c34;
    padding: 15px;
    text-align: center;
    color: white;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.2);
    z-index: 9999;
}

.upload-label {
    display: inline-block;
    padding: 10px 15px;
    background: #28A745;
    border-radius: 5px;
    cursor: pointer;
    color: white;
}