*,
::before,
::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
/* Firefox */
input[type=number] {
    -moz-appearance: textfield;
}
 
/* Chrome */
input::-webkit-inner-spin-button,
input::-webkit-outer-spin-button { 
	-webkit-appearance: none;
	margin:0;
}
 
/* Opéra*/
input::-o-inner-spin-button,
input::-o-outer-spin-button { 
	-o-appearance: none;
	margin:0
}



body {
    /*background-image: url("bg.png");*/
}

.main-container{
    width:100vw;
}


.title{
    width:50vw;
    margin:40px auto 0;

    text-align: center;             
    font-family: verdana;
    font-size: 24px;
    font-weight: bold;
    color:red;
}

.formulaire{
    width:100vw;
    margin:0 auto;
    text-align: center;
    margin-top: 25vh;               /* poussé d'un quart de la hauteur de viewport */
    font-family: verdana;
    font-size:16px;    
}

::placeholder{
    text-align:center;
    font-family:verdana;
}

.label{
    font-family: verdana;
    margin-bottom: 4px;
}

input{
    text-align:center;
    font-family: verdana;
    font-size:16px;
}
button{
    margin-top:15px;
}
.h2{
    width:50vw;
    margin:0 auto;
    text-align: center;
    margin-top: 10px;               
    font-family: verdana;
    font-size: 24px;
    font-weight: bold;
    color:red;
}

@media screen and (max-width: 1280px) and (orientation: portrait)
    {
        input,.label,.title{
            font-size:38px;
        }

        button{
            margin-top: 30px;
            font-size:38px;
        }
    }