* {
    margin: 0px;
    padding: 0px;

}




h1 {
    margin: 15px;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
}

#cronometro {
    margin-top: 50px;
    margin-bottom: 50px;
    font-size: 2rem;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
}

#image {
    margin: auto;
    width: 100 vh; 
    background-color: blue;    
    background-image: url(transito.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    
}

#semafaro {
    margin: auto;
    background-color: rgba(0, 0, 0, 0.644);
    border-style: solid;
    height: 400px;
    width: 200px;
    border-radius: 20px;
    position: relative;
}


.verde{

    background-color:rgb(0, 189, 94);
    border: solid ;
    margin: auto;
    width: 100px;
    height: 100px;
    position: absolute;
    left: 50%;
    top : 80%;
    transform: translateX(-50%) translateY(-50%);
    border-radius: 50%;

}
.amarelo {

    background-color: rgba(255, 255, 0, 0.897);
    border: solid;
    margin: auto;
    width: 100px;
    height: 100px;
    position: absolute;
    left: 50%;
    top : 50%;
    transform: translateX(-50%) translateY(-50%);
    border-radius: 50%;
}






.vermelho {

    background-color: red;
    border: solid ;
    margin: auto;
    width: 100px;
    height: 100px;
    position: absolute;
    left: 50%;
    top : 20%;
    transform: translateX(-50%) translateY(-50%);
    border-radius: 50%;

}