style.css

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: rgb(138, 138, 138);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

h1 {
    color: white;
}

.sketchpad {
    border: 1px ;
    width: 384px;
    height: 384px;
    display: flex;
    flex-flow: row wrap;
    background-color: rgba(255, 255, 255, 0.911);

}

.btn {
    padding: 10px;
    display: flex;
    gap: 0px 10px;
    margin-bottom: 20px;
}

button {
    padding: 10px;
    border-radius: 22px;
    border: 1px;
    background-color: aqua;
}

button:hover {
    background-color: rgb(104, 103, 103);
    color: black;
}

.firstgrid {
    border: 1px dotted rgb(138, 138, 138);
    width: 22px;
    height: auto;
}

.firstgridhover {
    background-color: aqua;
}