body { 
      margin: 0; 
      background: #111; 
      color: rgb(255, 255, 255); 
      font-family: Arial; 
    }
h1 {
    text-align: center;
    margin: 20px 0;
    }
#scene-container {
    position: relative !important;
    width: calc(100% - 80px) !important;
    height: calc(100vh - 160px) !important;
    margin: 40px !important;
    overflow: hidden !important;
    box-sizing: border-box !important;
}
canvas {
    display: block;
}


#controls {
        position: absolute;
    bottom: 10px;            /* pegado al borde inferior del contenedor */
    left: 50%;               /* centrado horizontal */
    transform: translateX(-50%);
    display: flex;
    flex-direction: row;     /* en fila */
    gap: 10px;
    z-index: 10;
    pointer-events: auto;    /* asegura que son clicables */
}

#controls button {
    padding: 10px 15px;
    font-size: 16px;
    background: rgba(0,0,0,0.6);
    color: white;
    border: 1px solid #fff;
    border-radius: 6px;
    cursor: pointer;
}

#controls button:hover {
    background: rgba(255,255,255,0.8);
    color: black;
}