body{
            width: 100%;
            text-align: center;
            margin-top: 0px;
        }
        .todo{
            width: 1100px;
            text-align: center;
            display:inline-block;
        }
        .cabeza{
            width: 100%;
            height: 185px;
        }
        .logo{
            width: 100%;
            height: 70px;
            vertical-align: middle;
        }
        .logo_img{
            width: 250px;
            height: 70px;
            float: left;
        }
        .logo_botones{
            margin-top: 3px;
        }
        .user{
            width: 70px;
            height: 70px;
            float: right;
            margin-top: 10px;
        }
        #linea{
            background-color: darkgrey;
            width: 100%;
            height: 2px;
        }
        .salir{
            width: 70px;
            height: 70px;
            float: right;
            margin-top: 10px;
        }
        .menu{
            width: 100%;
            height: 70px;
        }
        .titulo{
            background-color: darkgrey;
            width: 100%;
            height: 40px;
            line-height: 40px;
            color: white;
            font-weight: bold;
            font-size: 18px;
        }
        .cuerpo{
            width: 100%;
            height: 300px;
        }
        #acceso{
            margin: auto;
            width: 30%;
            height: 50%;
        }
        #flotante2{
            height: 50px;
            width: 100%;
        }
        input[type=text], select {
            width: 100%;
            padding: 12px 20px;
            margin: 8px 0;
            display: inline-block;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box;
        }
        input[type=password], select {
            width: 100%;
            padding: 12px 20px;
            margin: 8px 0;
            display: inline-block;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box;
        }
        input[type=submit] {
            width: 100%;
            background-color: #4CAF50;
            color: white;
            padding: 14px 20px;
            margin: 8px 0;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }
        input[type=submit]:hover {
            background-color: #45a049;
        }