body {
    font-family: 'Roboto', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: #FFFFFF;
    margin: 0;
    overflow: hidden; /* Prevents scrollbars from appearing */
    position: relative;
}

.game {
    background-color: #FFFFFF;
    padding: 24px;
    border-radius: 16px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 400px;
    width: 100%;
    margin: 16px;
    position: relative;
    z-index: 1;
}

.question {
    font-size: 2em;
    margin-bottom: 20px;
    color: #333;
}

.options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.option {
    padding: 16px;
    font-size: 1em;
    border: none;
    cursor: pointer;
    border-radius: 12px; /* Updated to increase corner radius */
    transition: background-color 0.3s, transform 0.2s;
    background-color: #F0F0F0; /* Softer surface color to reduce eye strain */
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.option:hover {
    background-color: #E0E0E0; /* Softer hover color to reduce sharp contrast */
    transform: scale(1.05);
}

.correct {
    background-color: #4CAF50; /* Green for correct answers */
    color: white;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); /* Added shadow to highlight correct option */
}

.incorrect {
    background-color: #FF5252; /* Red for incorrect answers */
    color: white;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); /* Added shadow to indicate importance */
}

.next-button {
    margin-top: 16px;
    padding: 12px 24px;
    font-size: 1em;
    border: none;
    border-radius: 24px;
    background-color: #BDBDBD; /* Updated to Material Design 3 disabled button color */
    color: white;
    cursor: not-allowed;
    transition: background-color 0.3s;
    display: inline-block;
}

.next-button.enabled {
    background-color: #03DAC6; /* Updated to Material Design 3 accent color */
    cursor: pointer;
}

canvas#smokeCanvas {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; /* Allows interactions with buttons through the canvas */
}