/* =========================
   MOBILE FIRST (GSM)
   ========================= */

body{
    margin:0;
    padding:15px;
    font-family: Arial, sans-serif;
    text-align:center;
    font-size:18px;
    background:#f9f9f9;
    line-height:1.5;
}

/* TITRE */

h1{
    font-size:26px;
    margin-bottom:15px;
}

/* TEXTE */

p{
    font-size:18px;
    margin-bottom:15px;
}

/* FORMULAIRE */

form{
    background:white;
    padding:15px;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,0.1);
}

/* INPUTS */

input{
    width:100%;
    padding:12px;
    margin:8px 0 15px 0;
    font-size:18px;
    border-radius:6px;
    border:1px solid #ccc;
    box-sizing:border-box;
}

/* BOUTON */

button{
    width:100%;
    background-color:#28a745;
    color:white;
    padding:14px;
    font-size:20px;
    border:none;
    border-radius:8px;
    cursor:pointer;
}

/* effet au clic */

button:active{
    background-color:#218838;
}

/* RESPONSIVE (petits GSM) */

@media screen and (max-width:480px){

    h1{
        font-size:22px;
    }

    p{
        font-size:16px;
    }

    input{
        font-size:16px;
        padding:10px;
    }

    button{
        font-size:18px;
        padding:12px;
    }
}