body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    color: rgba(255, 255, 255, 0.87);
    background-color: #000000;
    font-family: Arial, Helvetica, sans-serif;
}

body * {
    margin: 0;
    padding: 0;
    /* 
    -ms-user-select: none; 
    -webkit-user-select: none; 
    -moz-user-select: none; 
    user-select: none;  
    */
}

#app {
    width: 100%;
    height: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

#game-container {
    width: 100%;
    height: 100%;
}

.spritePosition {
    margin: 1% 0 0 1%;
    font-size: 80%; 
}

.button {
    width: 10%;           
    margin: 1%;          
    padding: 1%;         
    background-color: #000000;
    color: rgba(255, 255, 255, 0.87);
    border: 0.5% solid rgba(255, 255, 255, 0.87); 
    cursor: pointer;
    transition: all 0.3s;
}

.button:hover {
    border: 0.5% solid #0ec3c9;
    color: #0ec3c9;
}

.button:active {
    background-color: #0ec3c9;
}

.button:disabled {
    cursor: not-allowed;
    border: 0.5% solid rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.3);
}