.sliding-menu {
    background-color: rgb(40, 38, 38);
    visibility: hidden;
    position: fixed;
    overflow: hidden;
    width: 15%;
    height: 100%; 
}

.sliding-menu a,
.sliding-menu p {
    font-weight: 100;
    letter-spacing: 2px;
    font-size: 18px;
    color: rgb(200, 200, 200);
    text-decoration: none;
    margin: 0 20px;
}

.sliding-menu ul {
    list-style: none;
    text-align: center;
    padding: 0;
}

.sliding-menu li {
    margin: 40px auto 40px auto;
}

.sliding-menu hr {
    width: 50%;
    min-width: 100px;
    border-color: rgb(18, 209, 234);
}

.exit {
    position: absolute;
    font-size: 40px;
    color: white;
    cursor: pointer;
}

.left-menu i {
    font-size: 18px;
    margin-right: 3%;
}

.toggle_mnu {
    width: 60px;
    height: 60px;
    float: left;
    z-index: 100;
    border: none;
    left: 20px;
    top: -28px;
    position: fixed;
    background-color: transparent;
    margin-top: 45px;
    display: none;
}

.toggle_mnu .fa {
    font-size: 64px;
    color: #fff;
}

/* Smartphones (portrait and landscape) ----------- */
@media only screen
and (min-device-width : 320px) 
and (max-device-width : 480px) {

}

/*Smartphones (landscape) ----------- */
@media only screen and (min-width : 321px) {
    .toggle_mnu {
        width: 32px;
        height: 32px;
        left: 0;
        top: -45px;
    }
    .toggle_mnu .fa {
        font-size: 24px;
    }
    .sliding-menu {
        width: 40%;
    }
    .sliding-menu li {
        margin: 15px 0 20px 0;
    }
    .sliding-menu a, .sliding-menu p {
        font-size: 14px;
    }
}
/* Smartphones (portrait) ----------- */
@media only screen and (max-width : 320px) {
 .toggle_mnu {
    width: 32px;
    height: 32px;
    left: 0;
    top: -45px;
}
.toggle_mnu .fa {
    font-size: 24px;
}
.sliding-menu {
    width: 40%;
}
.sliding-menu li {
    margin: 15px 0 20px 0;
}
.sliding-menu a, .sliding-menu p {
    font-size: 14px;
}
}

@media only screen and (min-width: 992px) {
    .sliding-menu {
    width: 15%;
}
}