@keyframes movebg {
    0% {
        background-position: right;
    }
    50% {
        background-position: left;
    }
    100% {
        background-position: right;
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
}

body, html {
    width: 100vw;
    height: 100vh;
}

body {
    background-color: #f0f0f0;
}

header {
    display: flex;
    justify-content: center;
    align-items: center;
    background: url('../img/img02.jpg') center bottom/cover no-repeat;
    height: 80vh;
    #animation: movebg 35s ease-in-out infinite;
    backdrop-filter: blur(50px);
}

header nav {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header nav .logo {
    font-family: 'Roboto', sans-serif;
    font-size: 1.4rem;
    color: #fff;
    text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.5);
}

header nav button {
    background-color: transparent;
    color: #fff;
    font-size: 1.5rem;
    padding: 10px 15px;
    margin: 15px;
    border: 2px solid #fff;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.5s, color 0.5s;
}

header nav button:hover {
    background-color: #fff;
    color: #000;
}

header nav ul {
    display: none;
}

header article {
    text-align: center;
    color: #fff;
    font-size: 1.5rem;
    padding: 15px;
    text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.5);
}

header article p {
    margin: 15px 0;
}

header article button {
    background-color: transparent;
    color: #fff;
    font-size: 1.1rem;
    padding: 10px 15px;
    margin-top: 65px;
    border: 2px dotted #fff;
    border-radius: 5px;
    cursor: pointer;
    text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.5);
    transition: background-color 0.5s, color 0.5s;
}

header article button:hover {
    background-color: #fff;
    color: #000;
}

header video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 1;
    z-index: -1;
}

header nav img {
    width: 100px;
    padding: 10px;
    float: left;
}

@media screen and (min-width: 768px) {
    header nav button {
        display: none;
    }
    header nav {
        display: flex;
        justify-content: center;
        align-items: center;
    }
    header nav ul {
        #border: 1px solid #fff;
        width: 1024px;
        display: flex;
        justify-content: flex-end;
        margin: 15px;
        font-weight: lighter;
        font-family: 'Roboto', sans-serif;
    }
    header nav ul li {
        list-style: none;
    }
    header nav ul li a {
        color: #fff;
        font-size: 1.5rem;
        padding: 10px 15px;
        margin: 15px;
        text-decoration: none;
        transition: background-color 0.5s, color 0.5s;
    }
    header nav ul li a:hover {
        background-color: #fff;
        color: #000;
    }
}