.pantalla-2{
    display: none;
}


.contenedor-cronometro {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    /* background-color: #f5f5f5;  */
    border-radius: 20px;
    width: 150px;
    height: 120px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}


/* Cronómetro */
#cronometro {
    width: 100%;
    font-size: 2em;
    user-select: none;
    margin-top: 20px;
    font-weight: 500;
    background: #fff;
    border-radius: 50px;
    padding: 10px;
    /* color: #333;  */
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.3); 
}

.boton {
    width: 30px;
    height: 30px;
    font-size: 2em;
    border-radius: 50%;
    border: none;
    margin: 10px 15px;
    cursor: pointer;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2); 
    transition: box-shadow 0.3s ease; 
}

.boton:hover {
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.3); 
    opacity: 0.9;
}

#boton-inicio-pausa.iniciar,
#boton-inicio-pausa.iniciar i {
    background-color: #000000; 
}

#boton-inicio-pausa.iniciar {
    background-image: url(../img/icons/play.png);
    background-size: 20px;
    background-position: center;
    background-repeat: no-repeat;
}

#boton-inicio-pausa.pausar,
#boton-inicio-pausa.pausar i {
    background-color: #333333; 
}

#boton-inicio-pausa.pausar {
    background-image: url(../img/icons/pause.png);
    background-size: 20px;
    background-position: center;
    background-repeat: no-repeat;
}

#boton-reiniciar {
    background-color: #D2B48C; 
    background-image: url(../img/icons/reset.png);
    background-size: 20px;
    background-position: center;
    background-repeat: no-repeat;
}