* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    }

    body {
    font-family: "ROBOTO", sans-serif;
    /* background: linear-gradient(#141e30, #243b55); */
    }

    .nav,
    .slider {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    position: relative;
    background-color: #050822;
    text-align: center;
    padding: 0 2em;
    }

    .nav h1,
    .slider h1 {
    font-family: "Josefin Sans", sans-serif;
    font-size: 5vw;
    margin: 0;
    padding-bottom: 0.5rem;
    letter-spacing: 0.5rem;
    color: #00f7ff;
    transition: all 0.3s ease;
    z-index: 3;
    }
    h1:hover {
    transform: translate3d(0, -10px, 22px);
    color: #0267ff;
    }

    .slider h2 {
    font-size: 2vw;
    letter-spacing: 0.3rem;
    font-family: "ROBOTO", sans-serif;
    font-weight: 300;
    color: #ffffff;
    z-index: 4;
    }
    h3.span {
    font-size: 2vw;
    letter-spacing: 0.5em;
    font-family: "ROBOTO", sans-serif;
    font-weight: 900;
    color: #faebd7;
    z-index: 4;
    }
    span:hover {
    color: #ff0266;
    font-weight: 500;
    font-size: 2.2vw;
    }

    a {
    text-decoration: none;
    }

    .nav-container {
    display: flex;
    flex-direction: row;
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 75px;
    box-shadow: 20px 20px 50px rgba(0, 0, 0, 0.5);
    background: #1e1f26;
    z-index: 10;
    transition: all 0.3s cubic-bezier(0.19, 1, 0.22, 1);
    }

    .nav-container--top-first {
    position: fixed;
    top: 75px;
    transition: all 0.3s cubic-bezier(0.19, 1, 0.22, 1);
    }

    .nav-container--top-second {
    position: fixed;
    top: 0;
    }
    .nav-tab {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
    color: #06ad9d;
    letter-spacing: 0.1rem;
    transition: all 0.5s ease;
    font-size: 2vw;
    }

    .nav-tab:hover {
    color: #1e1f26;
    background: #03dac6;
    transition: all 0.5s ease;
    }

    .nav-tab-slider {
    position: absolute;
    bottom: 0;
    width: 0;
    height: 2px;
    background: #03dac6;
    transition: left 0.3s ease;
    }

    .background {
    position: absolute;
    height: 90vh;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: auto;  
    /* background: linear-gradient(#141e30, #243b55);   */
    }

    @media (min-width: 800px) {
    .nav h1,
    .slider h1 {
        font-size: 5vw;
    }

    .nav h2,
    .slider h2 {
        font-size: 3vw;
    }

    .nav-tab {
        font-size: 3vw;
    }
    }

    .background {
        position: absolute;
        height: 100vh;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 0;
        
    }

    .loader span {
        color: #07ffea;
        text-shadow: 0 0 0 #ffe8c9;
        -webkit-animation: loading 1s ease-in-out infinite alternate;
    }

    @-webkit-keyframes loading {
    to {
        text-shadow: 20px 0 70px #00eeff;
        color: #135ce4;
    }
    }
    .loader span:nth-child(2) {
    -webkit-animation-delay: 0.1s;
    }
    .loader span:nth-child(3) {
    -webkit-animation-delay: 0.2s;
    }
    .loader span:nth-child(4) {
    -webkit-animation-delay: 0.3s;
    }
    .loader span:nth-child(5) {
    -webkit-animation-delay: 0.4s;
    }
    .loader span:nth-child(6) {
    -webkit-animation-delay: 0.5s;
    }
    .loader span:nth-child(7) {
    -webkit-animation-delay: 0.6s;
    }
    .loader span:nth-child(8) {
    -webkit-animation-delay: 0.7s;
    }
    .loader span:nth-child(9) {
    -webkit-animation-delay: 0.8s;
    }

    .loader span:nth-child(10) {
    -webkit-animation-delay: 0.9s;
    }
    .loader span:nth-child(11) {
    -webkit-animation-delay: 1s;
    }
    .loader span:nth-child(12) {
    -webkit-animation-delay: 1.1s;
    }
    .loader span:nth-child(13) {
    -webkit-animation-delay: 1.2s;
    }
    .loader span:nth-child(14) {
    -webkit-animation-delay: 1.3s;
    }
    .loader span:nth-child(15) {
    -webkit-animation-delay: 1.4s;
    }
    .loader span:nth-child(16) {
    -webkit-animation-delay: 1.5s;
    }
    .loader span:nth-child(17) {
    -webkit-animation-delay: 1.6s;
    }
    .loader span:nth-child(18) {
    -webkit-animation-delay: 1.7s;
    }
    .loader span:nth-child(19) {
    -webkit-animation-delay: 1.8s;
    }
    .loader span:nth-child(20) {
    -webkit-animation-delay: 1.9s;
    }
    .loader span:nth-child(21) {
    -webkit-animation-delay: 2s;
    }
    .loader span:nth-child(22) {
    -webkit-animation-delay: 2.1s;
    }

    /* LOGIN-BOX */
    .login-box {
        position: absolute;
        top: 50%;
        left: 50%;
        width: 400px;
        padding: 40px;
        transform: translate(-50%, -50%);
        background: rgba(0,0,0,.5);
        box-sizing: border-box;
        box-shadow: 0 15px 25px rgba(1, 183, 255, 0.685);
        border-radius: 10px;        
    }
    .login-box h2 {
        margin: 0 0 30px;
        padding: 0;
        text-align: center;
        color: #00f7ff;
        margin-bottom: 2px;
        font-family: "Josefin Sans", sans-serif;
    }
    .login-box .user-box {
        position: relative;
    }   
    .login-box .user-box input {
        width: 100%;
        padding: 10px 0;
        font-size: 16px;
        color: #fff;
        margin-bottom: 30px;
        border: none;
        border-bottom: 1px solid #fff;
        outline: none;
        background: transparent;
    }
    
    .login-box .user-box label {
        position: absolute;
        top:0;
        left: 0;
        padding: 10px 0;
        font-size: 16px;
        color: #fff;
        pointer-events: none;
        transition: .5s;
    }
    
    .login-box .user-box input:focus ~ label,
    .login-box .user-box input:valid ~ label {
        top: -20px;
        left: 0;
        color: #03e9f4;
        font-size: 12px;
    }
    
    .login-box form a {
        position: relative;
        display: inline-block;
        padding: 10px 20px;
        color: #03e9f4;
        font-size: 16px;
        text-decoration: none;
        text-transform: uppercase;
        overflow: hidden;
        transition: .5s;
        margin-top: 40px;
        letter-spacing: 4px
    }
    
    .login-box a:hover {
        background: #03e9f4;
        color: #fff;
        border-radius: 5px;
        box-shadow: 0 0 5px #03e9f4,
                    0 0 25px #03e9f4,
                    0 0 50px #03e9f4,
                    0 0 100px #03e9f4;
    }
    
    .login-box a span {
        position: absolute;
        display: block;
    }
     
    .login-box a span:nth-child(1) {
        top: 0;
        left: -100%;
        width: 100%;
        height: 2px;
        background: linear-gradient(90deg, transparent, #03e9f4);
        animation: btn-anim1 1s linear infinite;
    }
    
    
    
    .login-box a span:nth-child(2) {
        top: -100%;
        right: 0;
        width: 2px;
        height: 100%;
        background: linear-gradient(180deg, transparent, #03e9f4);
        animation: btn-anim2 1s linear infinite;
        animation-delay: .25s
    }

    .login-box a span:nth-child(3) {
        bottom: 0;
        right: -100%;
        width: 100%;
        height: 2px;
        background: linear-gradient(270deg, transparent, #03e9f4);
        animation: btn-anim3 1s linear infinite;
        animation-delay: .5s
    }

    .login-box a span:nth-child(4) {
        bottom: -100%;
        left: 0;
        width: 2px;
        height: 100%;
        background: linear-gradient(360deg, transparent, #03e9f4);
        animation: btn-anim4 1s linear infinite;
        animation-delay: .75s
    }

    @keyframes btn-anim1 {
        0% {
            left: -100%;
        }
        50%,100% {
            left: 100%;
        }
    }
    
    @keyframes btn-anim2 {
        0% {
            top: -100%;
        }
        50%,100% {
            top: 100%;
        }
    }

    @keyframes btn-anim3 {
        0% {
            right: -100%;
        }
        50%,100% {
            right: 100%;
        }
    }
    
    @keyframes btn-anim4 {
        0% {
            bottom: -100%;
        }
        50%,100% {
            bottom: 100%;
        }
    }