header {
    padding: 50px 25px;
    padding-top: 100px;
    display: flex;
    justify-content: center;
    align-items: center;

    gap: 50px;
    flex-wrap: wrap;

    overflow: hidden;
}

header video {
    background: #012a62;
    background-size: cover;
    background-position: center;
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
    object-fit: cover;
    filter: brightness(0.45);
}

.header_text {
    width: 2048px;
    max-width: 70%;
    z-index: 1;
}

header .circle {
    height: 250px;
    width: 250px;

    max-width: 80vw;
    max-height: 80vw;

    overflow: hidden;
    border-radius: 50%;
    border: 3px solid rgb(0, 102, 255);

    display: flex;
    align-items: center;
    z-index: 1;
}

header .circle img {
    width: 100%;
    z-index: 1;
}

nav {
    position: fixed;
    top: 0;
    right: 10%;
    z-index: 999;
}

nav ul.nav_ul {
    font-size: 16px;
    display: table-cell;
    text-align: left;
    background-color: #fff;
    -webkit-border-bottom-left-radius: 5px;
    -khtml-border-bottom-left-radius: 5px;
    border-bottom-left-radius: 5px;
    -webkit-border-bottom-right-radius: 5px;
    -khtml-border-bottom-right-radius: 5px;
    border-bottom-right-radius: 5px;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

nav ul.nav_ul li {
    display: block;
    position: relative;
    padding-left: 10px;
    padding-right: 5px;

    float: left;
    height: 25px;

    color: #000;
}

nav ul.nav_ul li p {
    position: relative;
    top: -15px;
    height: 53px;
    display: table-cell;
    vertical-align: middle;
    padding-right: 6px;
    padding-left: 6px;

    color: #000;
    text-decoration: none;
    z-index: 99;
}

nav ul.nav_ul li p .bubble {
    background: red;
    color: white;
    font: bold 0.9em Tahoma, Arial, Helvetica;
    font-size: 12px;
    padding-left: 5px;
    padding-right: 5px;
    border-radius: 100px;
}

nav ul.nav_ul li a {
    position: relative;
    top: -15px;
    height: 53px;
    display: table-cell;
    vertical-align: middle;
    padding-right: 6px;
    padding-left: 6px;

    color: #000;
    text-decoration: none;
}


nav ul.nav_ul li a:hover {
    background-color: var(--main-brand-color);
    color: white;
    text-decoration: none;
}

/* a after Element */
nav ul.nav_ul li a::after {
    content: '';
    height: 2px;
    width: 0;
    background: var(--main-brand-color);
    position: absolute;
    bottom: 0;
    left: 0;
    color: var(--text-color);
    transition: 150ms ease-in-out;
}

nav ul.nav_ul li a.active {
    background: var(--main-brand-color);
    color: white;
    text-decoration: none;
}

.subheading {
    margin-top: 25px;
    color: white;
}

#toggle_btn {
    display: none;
}

label[for="toggle_btn"] {
    display: none;
}

.break {
    flex-basis: 100%;
    height: 0;
}

@media (max-width: 1200px) {
    header {
        padding-top: 70px;
    }
}

@media(max-width: 800px) {

    header {
        padding: 50px 25px;
    }

    header video {
        height: 100vh;
    }

    .header_text {
        width: 2500px;
        max-width: 70%;
        margin: inherit;
    }

    nav {
        position: absolute;
        top: 0;
        right: inherit;
        left: 0;
        background: var(--secondary-color);
        padding: 15px;
        border-radius: 0 0 25px 0;
    }

    nav ul.nav_ul {
        display: none;
        flex-direction: column;
    }

    .subheading {
        display: none;
    }

    #toggle_btn:checked~ul {
        display: flex;
    }

    label[for="toggle_btn"] {
        display: block;
    }

}