body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

canvas {
    display: block;
}

#carousel {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 10px;
    overflow-x: auto;
}

.carousel-item {
    width: 60px;
    height: 60px;
    background-color: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 24px;
    color: white;
    font-family: sans-serif;
    flex-shrink: 0;
}

.carousel-item.selected {
    background-color: rgba(255, 255, 255, 0.5);
    border-color: #fff;
}

#scale-container {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 10px;
    color: white;
    font-family: sans-serif;
}

#scale-container.hidden {
    display: none;
}

.ctrl-button {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 0 8px rgba(0,0,0,0.5);
}

.ctrl-button.active {
    background-color: #007bff;
}

.info-spot {
    position: absolute;
    background-color: #007bff;
    color: white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: sans-serif;
    font-weight: bold;
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 0 8px rgba(0,0,0,0.5);
    user-select: none; /* prevent text selection */
}