nav {
    height: 80px;
    width: 100%;
    position: absolute;
    top: 0;
    right: 0;
    z-index: 9999;
    background-color: #B42725;
}

.enlace {
    position: absolute;
    padding: 10px 100px;
}

.logo {
    position: absolute;
    height: 50px;
}

nav ul {
    float: right;
    margin-right: 80px;
    list-style: none;
}

nav ul li {
    display: inline-block;
    line-height: 80px;
    margin: 0 5px;
}

nav ul li a {
    font-weight: 300;
    color: white;
    font-size: 20px;
    padding: 7px 12px;
    text-decoration: none;
    transition: all .5s linear;
    font-family: 'Stick No Bills', sans-serif;
}

li a.active,
li a:hover {
    font-size: 18px;
    text-decoration: none;
    border: 1px solid white;
    color: wheat;
}

.check-btn {
    font-size: 30px;
    color: goldenrod;
    float: right;
    line-height: 60px;
    margin-right: 40px;
    cursor: pointer;
    display: none;
}

#check {
    display: none;
}

@media (max-width: 800px) {
    h2 {
        padding-top: 50px;
        font-size: 1.7rem;
    }
    nav {
        background-color: brown;
        height: 60px;
        position: fixed;
    }
    nav ul {
        margin-right: 20px;
    }
    .logo {
        height: 35px;
    }
    .enlace {
        padding: 10px;
    }
    nav ul li a {
        font-size: 16px;
    }
    label i {
        color: white;
    }
    h1 {
        text-align: center;
        font-size: 40px;
    }
}

@media (max-width:580px) {
    h2 {
        font-size: 1.6rem;
    }
    .check-btn {
        display: block;
    }
    ul {
        position: fixed;
        height: 100vh;
        width: 100%;
        background: #B42725;
        /* fallback for old browsers */
        background: -webkit-linear-gradient(to right, #190A05, #870000);
        /* Chrome 10-25, Safari 5.1-6 */
        background: linear-gradient(to right, #190A05, #870000);
        /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
        opacity: 0.9;
        top: 60px;
        left: -150%;
        text-align: center;
        transition: all .5s;
    }
    nav ul li {
        display: block;
        margin: 50px 0;
        line-height: 30px;
    }
    nav ul li a {
        color: white;
        font-size: 21px;
    }
    #check:checked~ul {
        left: 0;
    }
}