.header {
    top: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    padding: 20px 0 0;
    position: absolute;
}

.header.active {
    top: 35px;
    position: fixed;
    padding: 20px 15px;
}

.header.active .container {
    margin: auto;
    max-width: 1200px;
}

.header .nav-toggler {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--white-alpha-40);
    background-color: var(--white-alpha-25);
    transition: all 0.25s ease-in-out;
    border-radius: 50%;
    cursor: pointer;
    margin: 0 -20px;
    height: 50px;
    width: 50px;
    z-index: 1;
}

.header .nav-toggler.hide {
    opacity: 0;
}

.header .nav-toggler:hover {
    background-color: var(--white-alpha-40);
}

.header .nav-toggler span {
    width: 25px;
    height: 2px;
    position: relative;
    background-color: var(--dark-blue);
    transition: background-color 0.25s ease;
}

.header.active .nav-toggler span {
    background-color: transparent;
}

.header.active .nav-toggler span:hover::before,
.header.active .nav-toggler span:hover::after {
    background-color: var(--red)
}

.header .nav-toggler span::before,
.header .nav-toggler span::after {
    content: '';
    position: absolute;
    background-color: var(--dark-blue);
    transition: all 0.25s ease;
    height: 100%;
    width: 100%;
    top: 0;
}

.header .nav-toggler span::before {
    transform: translateY(-10px);
    left: 0;
}

.header.active .nav-toggler span::before {
    transform: rotate(45deg);
}

.header .nav-toggler span::after {
    transform: translateY(10px);
    right: 0;
}

.header.active .nav-toggler span::after {
    transform: rotate(-45deg);
}

.header:not(.active) .nav-toggler:hover span::before,
.header:not(.active) .nav-toggler:hover span::after {
    width: 50%;
}

.header .nav-main {
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    position: fixed;
    overflow-y: hidden; 
    padding: 30px 15px;
    visibility: hidden;
}

.header.active .nav-main {
    visibility: visible;
}

.header .nav-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
    border: 1px solid var(--white-alpha-40);
    background-color: var(--white-alpha-25);
    min-height: calc(100vh - 70px);
    transition: all 0.25s ease;
    border-radius: 10px;
    max-width: 1200px;
    margin: 5px auto;
    opacity: 0;
}

.header.active .nav-inner {
    opacity: 1;
}

.header .nav-inner ul li {
    text-align: center;
}

.header .nav-inner ul li a {
    display: block;
    font-weight: 500;
    font-size: x-large;
    padding: 10px 15px;
    position: relative;
    color: var(--dark-blue);
    text-transform: capitalize;
    transition: color 0.25s ease;
}

.header .nav-inner ul li a::before {
    content: '';
    z-index: -1;
    position: absolute;
    background-color: var(--white-alpha-25);
    transition: width 0.25s ease;
    height: 100%;
    width: 0%;
    bottom: 0;
    right: 0;
}

.header .nav-inner ul li a[href="#about"]::before,
.header .nav-inner ul li a[href="#contact"]::before {
    content: '';
    z-index: -1;
    position: absolute;
    background-color: var(--white-alpha-25);
    transition: width 0.25s ease;
    height: 100%;
    width: 0%;
    bottom: 0;
    left: 0;
}

.header .nav-inner ul li a:hover::before {
    width: 100%;
    border: 1px solid var(--white-alpha-40);
}

.header .nav-inner ul li a:hover {
    color: var(--red);
}

/* ~~~~~~~~~~~~~~~~~~~~~ RESPONSIVE ~~~~~~~~~~~~~~~~~~~~~ */

@media (max-width: 1045px) {
    .header .nav-toggler {
        margin: -10px 10px;
        height: 40px;
        width: 40px;
    }

    .header .nav-toggler span {
        width: 15px;
        height: 2px;
    }
}

@media (max-width: 575px) {
    .header .nav-inner ul li a {
        font-size: large;
    }
}