html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

header {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
}

canvas {
    background-size: cover;
    background-position: center;
}

aside {
    padding: 20px;
}

button {
    background-color: #6c757d; /* Subtle shade */
    color: white;
    border: none;
    border-radius: 5px;
    padding: 8px 16px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #5a6268;
}

button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(108, 117, 125, 0.5);
}

button.close-button {
    background-color: transparent;
    color: black;
    font-size: 20px;
    padding: 0;
    border: none;
    cursor: pointer;
    position: absolute;
    top: 5px;
    right: 5px;
}

button.close-button:hover {
    color: red;
}

#congrats {
    visibility: hidden;
}