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

.nav {
    display: flex;
    background-color: #000;
    padding: 20px;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1;
}

.nav ul {
    list-style: none;
}

.nav li a {
    color: #fff;
    text-decoration: none;
    margin: 25px;
    font-size: 20px;
    transform: translateX(5%);
}

.nav li:hover {
    opacity: 0.8;
    cursor: pointer;
}

.navbar {
  display: flex;
  margin-left: 500px;
}

.logo {
  font-weight: 900;
}


.header {
    width: 100vw;
    height: 100vh;
    background-image: url('https://cdn.pixabay.com/photo/2016/11/14/22/18/beach-1824855_1280.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center;
    animation: fly 10s linear infinite;
}

.header h1 {
    color: #fff;
    font-weight: bolder;
    font-size: 120px;
    text-align: center;
    position: absolute;
    top: 20%;
    left: 25%;
    z-index: 200;
}

.bird {
    position: absolute;
    bottom: 0px;
    left: 0px;
}

@keyframes fly {
    from {
        background-position: 100% 0;
    }
    to {
        background-position: 0 0;
    }
}

/* Tablets and Under */ 
@media(max-width: 768px) {

    
    .logo {
        margin-left: 250px;
        padding: 15px 30px;
        font-size: 25px;
        color: aqua;
    }

    .header {
        width: 100%;
    }

     .header h1 {
        font-size: 5rem;
        margin-top: 1rem;
    }

    .bird {
        width: 45%;
        margin-bottom: 9em;
    }

    .navbar li {
        margin-left: -190px;
    }

    .navbar li a {
        font-size: 14px;
    }
}

@media(max-width: 500px) {

    
    .logo {
        margin-left: 180px;
        padding: 15px 10px;
        font-size: 20px;
        color: aqua;
    }

    
    .header {
        width: 100%;
    }

    .header h1 {
       font-size: 4rem;
       margin-top: 1em;
      }

      .bird {
        width: 45%;
        margin-bottom: 9em;
    }

    .navbar li {
        margin-left: -200px;
    }

    .navbar li a {
        font-size: 12px;
    }
  
}