.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(5, 11, 24, .86);
    border-bottom: 1px solid rgba(168, 176, 195, .12);
    backdrop-filter: blur(20px);
}

.header-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    gap: 28px;
}

.brand {
    flex: 0 0 auto;
}

.brand img {
    width: 220px;
    max-height: 60px;
    object-fit: contain;
}

.main-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 3px;
}

.main-nav a {
    position: relative;
    padding: 28px 11px 25px;
    color: #C9D0DD;
    font-size: .84rem;
    font-weight: 600;
    transition: color .18s ease;
}

.main-nav a::after {
    content: '';
    position: absolute;
    left: 11px;
    right: 11px;
    bottom: 17px;
    height: 2px;
    border-radius: 999px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform .18s ease;
}

.main-nav a:hover,
.main-nav a.is-active {
    color: white;
}

.main-nav a:hover::after,
.main-nav a.is-active::after {
    transform: scaleX(1);
}

.header-listen {
    flex: 0 0 auto;
    min-height: 44px;
    padding-inline: 18px;
    font-size: .72rem;
}

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255,255,255,.03);
    padding: 10px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 2px;
    margin: 5px 0;
    border-radius: 4px;
    background: white;
    transition: .2s ease;
}

.menu-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1080px) {
    .header-listen {
        display: none;
    }
}

@media (max-width: 940px) {
    .header-inner {
        min-height: 70px;
        justify-content: space-between;
    }

    .brand img {
        width: 190px;
    }

    .menu-toggle {
        display: block;
    }

    .main-nav {
        position: absolute;
        top: calc(100% + 1px);
        left: 14px;
        right: 14px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 10px;
        border: 1px solid var(--line-bright);
        border-radius: 16px;
        background: rgba(6, 13, 28, .985);
        box-shadow: var(--shadow);
    }

    .main-nav.is-open {
        display: flex;
    }

    .main-nav a {
        padding: 14px 16px;
        border-radius: 10px;
    }

    .main-nav a::after {
        display: none;
    }

    .main-nav a:hover,
    .main-nav a.is-active {
        background: rgba(124, 58, 237, .14);
    }
}