.main-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    padding: 18px 0;
    background: rgba(5, 8, 16, 0.65);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.main-header::after {
    content: '';
    position: absolute;
    inset: auto 0 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.8), transparent);
    opacity: 0.6;
}

.header-inner {
    width: min(92%, var(--grid-max));
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand img {
    width: 46px;
    height: 46px;
}

.brand span {
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 0.2em;
    color: var(--clr-cyan);
    font-size: 0.9rem;
}

.main-nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 24px;
}

.nav-list {
    display: flex;
    gap: 18px;
    align-items: center;
}

.nav-list > li { position: relative; }

.nav-list > li > a {
    font-size: 0.95rem;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    text-transform: uppercase;
    font-family: 'Rajdhani', sans-serif;
    padding: 8px 4px;
}

.nav-list > li > a.active,
.nav-list > li > a:hover {
    color: var(--clr-cyan);
}

.nav-cta {
    padding: 10px 22px;
    border-radius: 999px;
    border: 1px solid rgba(0, 212, 255, 0.4);
    color: var(--clr-cyan);
    font-family: 'Orbitron';
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    min-width: 200px;
    padding: 14px;
    background: rgba(5, 8, 16, 0.92);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
    display: none;
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 24px;
    width: 12px;
    height: 12px;
    background: inherit;
    transform: rotate(45deg);
}

.dropdown-menu li a {
    display: block;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
}

.dropdown-menu li a:hover {
    background: rgba(157, 78, 221, 0.1);
    color: var(--clr-cyan);
}

.nav-list > li:hover > .dropdown-menu {
    display: block;
}

.menu-toggle {
    display: none;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: transparent;
    position: relative;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.menu-toggle span {
    position: absolute;
    width: 22px;
    height: 2px;
    background: var(--text-main);
    transition: 0.3s;
}

.menu-toggle span:nth-child(1) { transform: translateY(-6px); }
.menu-toggle span:nth-child(2) { transform: translateY(0); }
.menu-toggle span:nth-child(3) { transform: translateY(6px); }

body.nav-open .menu-toggle span:nth-child(1) {
    transform: translateY(0) rotate(45deg);
}

body.nav-open .menu-toggle span:nth-child(2) {
    opacity: 0;
}

body.nav-open .menu-toggle span:nth-child(3) {
    transform: translateY(0) rotate(-45deg);
}

@media (max-width: 1100px) {
    .menu-toggle { display: inline-flex; }
    .main-nav {
        position: fixed;
        top: 78px;
        right: 16px;
        left: 16px;
        flex-direction: column;
        background: rgba(5, 8, 16, 0.95);
        border-radius: var(--radius-md);
        padding: 24px;
        border: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
        transform: translateY(-20px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease, transform 0.3s ease;
    }

    body.nav-open .main-nav {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: 10px;
    }

    .dropdown-menu {
        position: static;
        display: none;
        margin-top: 6px;
        box-shadow: none;
    }

    .nav-list > li.open > .dropdown-menu {
        display: block;
    }

    .nav-cta {
        width: 100%;
        justify-content: center;
    }
}