.boite_login {
    width:300px;
    border: 1px solid black;
    padding:40px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform:translate(-50%, -50%);
     border-radius: 4px;
 box-shadow: inset 0 1px 1px rgba(0,0,0,0.075);  
}

.boite_login_s {
  width:60%;
    border: 1px solid black;
    padding: 40px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform:translate(-50%, -50%);
     border-radius: 4px;
 box-shadow: inset 0 1px 1px rgba(0,0,0,0.075);  
 font-size:25px;
}

input {
 font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
 font-size: 14px;
 line-height: 1.428571429;
 color: #333;
 margin-bottom: 15px;
 box-sizing: border-box;
 text-align: left;
 border-radius: 4px;
 box-shadow: inset 0 1px 1px rgba(0,0,0,0.075);
 padding:10px;
 width:100%
}

button {
    width:100%;
    padding-top: 10px;
    padding-bottom: 10px;
    font-size: 20px;
    color: #fff;
    background-color: #ca3978;
    border-color: #357ebd;
    margin-bottom: 0;
    font-size: 14px;
    font-weight: normal;
    line-height: 1.428571429;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    border: 1px solid transparent;
        border-top-color: transparent;
        border-right-color: transparent;
        border-bottom-color: transparent;
        border-left-color: transparent;

    border-radius: 4px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
    box-sizing: border-box;
}