* {
    box-sizing: border-box;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: var(--felt-color);
    /* Spieltisch-Filz als CSS statt Fremdgrafik */
    background-image: radial-gradient(circle at 50% 35%, rgba(255,255,255,0.06), rgba(0,0,0,0.25) 70%),
                      repeating-linear-gradient(45deg, rgba(0,0,0,0.04) 0 2px, transparent 2px 4px);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: white;
}

.hidden { display: none !important; }

.top-controls {
    position: fixed;
    top: 10px;
    right: 10px;
    z-index: 5000;
    display: flex;
    gap: 10px;
}

.icon-btn {
    background: rgba(0,0,0,0.5);
    border: 1px solid rgba(255,255,255,0.3);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background 0.2s, transform 0.1s;
}

.icon-btn:hover {
    background: rgba(255,255,255,0.2);
}

.icon-btn:active {
    transform: scale(0.9);
}

.icon-btn.muted {
    opacity: 0.6;
}