body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: sans-serif;
    background-color: #121212;
    color: #fff;
    overflow: hidden;
    touch-action: none; /* Prevent browser handling of pinch/zoom/scroll */
}

.intro-container {
    padding: 40px;
    text-align: center;
    max-width: 90%;
    width: 400px;
    z-index: 10;
}

.intro-container h1 {
    margin-top: 0;
    font-size: 2.5rem;
    color: #fff;
    font-weight: bold;
}

.intro-container p {
    font-size: 1.1rem;
    color: #bbb;
    margin-bottom: 40px;
    line-height: 1.5;
}

button {
    background-color: #0088ff;
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

button:hover {
    background-color: #0077ee;
}

button:active {
    transform: scale(0.95);
}

button:disabled {
    background-color: #444;
    color: #888;
    cursor: not-allowed;
}

#gameCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
}

.hidden {
    display: none !important;
}