body, html {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background: #111;
    color: white;
    font-family: sans-serif;
}

h1 {
    text-align: center;
    margin: 0;
    font-size: 1.5em;
}

#canvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    cursor: default;
}

#infoBox {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 20px;
    border-radius: 8px;
    z-index: 1000;
}

#closeBtn {
    position: absolute;
    top: 5px;
    right: 10px;
    background: red;
    border: none;
    color: white;
    font-weight: bold;
    cursor: pointer;
}

.tooltip {
    display: none;
    position: absolute;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px;
    border-radius: 4px;
    pointer-events: none;
    z-index: 1000;
    font-size: 14px;
}

.header-top {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
}

.header-top h1 {
    margin: 0;
    font-size: 1.5em;
    color: white;
}

.back-arrow {
    color: white;
    font-style: bold;
    text-decoration: none;
    margin: 0;
    font-size: 2em;
    transition: transform 0.2s;
}

.back-arrow:hover {
    transform: translateX(-3px);
}

.bottom-info {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 1000;
}

.bottom-info p {
    font-weight: bold;
    color: #fff;
    font-size: 1em;
}

.credits-link {
    color: #ccc;
    text-decoration: none;
    font-size: 0.9em;
    cursor: pointer;
    transition: color 0.3s;
}

.credits-link:hover {
    color: white;
}

.credits-popup {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    padding: 10px 15px;
    border-radius: 4px;
    margin-bottom: 10px;
    white-space: nowrap;
    font-size: 0.9em;
}

.credits-popup a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.credits-popup a:hover {
    color: white;
}

@media (max-width: 768px) {
    #infoBox {
        width: 80%;
        max-width: 300px;
        background: rgba(0, 0, 0, 0.3);
        border: 1px solid rgba(255, 255, 255, 0.5);
    }
    .tooltip {
        display: none !important;
    }
    .credits-popup {
        font-size: 0.8em;
        padding: 8px 12px;
    }

    .header-top {
        flex-direction: column;
        align-items: center;
        gap: 4px;
    }

    .back-arrow {
        position: relative;
        left: 0;
        transform: none;
        font-size: 1.2em;
    }

    .back-arrow:hover {
        transform: translateX(-3px);
    }

    .header-top h1 {
        text-align: center;
        font-size: 1em;
    }
}