@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700&display=swap");

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
    overflow: hidden;
}

:root {
    --black: #000;
    --white: #fff;
}

.dark {
    --black: #fff;
    --white: #000;
}

header {
    position: absolute;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 40px 100px;
    z-index: 10000;
}

header .logo {
    color: var(--black);
    text-decoration: none;
    font-size: 2em;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.rightSide {
    display: flex;
}

.btns {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    cursor: pointer;
    margin-left: 10px;
}

.btns ion-icon {
    font-size: 1.5em;
    color: var(--black);
}

.btns.menuToggle ion-icon {
    font-size: 3em; 
    margin-top: -13px;
}

.btns ion-icon:nth-child(2) { display: none; }
.btns.active ion-icon:nth-child(2) { display: block; }
.btns.active ion-icon:nth-child(1) { display: none; }

.main {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.main video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    user-select: none;
    mix-blend-mode: screen;
}

.dark .mask {
    filter: invert(1);
    mix-blend-mode: multiply;
}

.main .heading h4 {
    z-index: 3;
    font-size: 6.8rem;
    color: cyan;
    text-shadow: 0 20px 30px rgba(0, 0, 0, 0.6);
}

.main .heading h3 {
    z-index: 3;
    font-size: 8.5rem;
    color: cyan;
    text-shadow: 0 20px 30px rgba(0, 0, 0, 0.6);
}

.navigation {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background: var(--white);
    z-index: 4;
    transition: 0.5s;
}

.navigation.active {
    left: 0;
}

.navigation li {
    list-style: none;
}

.navigation li a {
    margin: 5px 0;
    font-size: 2.25em;
    text-decoration: none;
    color: var(--black);
    padding: 5px 20px;
    border-radius: 40px;
}

.navigation li a:hover {
    background: var(--black);
    color: var(--white);
}

.copyrightText {
    position: absolute;
    left: 100px;
    top: 40px;
    z-index: 4;
    font-weight: 500;
    font-size: 1.2em;
    color: var(--black);
}

.wrapper {
    display: inline-flex;
}

@media (max-width: 768px) {
    header {
        padding: 20px;
    }

    .copyrightText {
        left: 20px;
        bottom: 30px;
    }
}