.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 100;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(10, 135, 184, .08);
    transition: box-shadow var(--transition), background var(--transition);
}

.site-header.is-scrolled {
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 12px 35px rgba(6, 43, 58, .08);
}

.site-header .site-header-inner {
    width: min(calc(100% - (var(--gutter) * 2)), var(--container));
    min-height: 82px;
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.site-header .brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
}

.site-header .brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
}

.site-header .brand-mark svg {
    width: 27px;
    fill: white;
}

.site-header .brand-copy {
    display: grid;
    line-height: 1.02;
    font-size: 15px;
    letter-spacing: -.02em;
}

.site-header .brand-copy strong {
    font-size: 17px;
    color: var(--c-navy);
}

.site-header .brand-copy span {
    color: var(--c-primary);
    font-weight: 700;
}

.site-header .desktop-nav {
    display: flex;
    align-items: center;
    gap: 30px;
    font-size: 14px;
    font-weight: 650;
}

.site-header .desktop-nav a {
    position: relative;
    transition: color var(--transition);
}

.site-header .desktop-nav a:not(.nav-login)::after {
    content: "";
    position: absolute;
    left: 0;
    right: 100%;
    bottom: -8px;
    height: 2px;
    background: var(--gradient-brand);
    transition: right var(--transition);
}

.site-header .desktop-nav a:hover {
    color: var(--c-primary);
}

.site-header .desktop-nav a:hover::after {
    right: 0;
}

.site-header .nav-login {
    padding: 10px 18px;
    border-radius: 999px;
    color: var(--c-white);
    background: var(--gradient-brand);
    box-shadow: 0 8px 20px rgba(10, 135, 184, .18);
}

.site-header .menu-toggle, .site-header .mobile-nav {
    display: none;
}

@media (max-width: 980px) {
    .site-header .desktop-nav {
        display: none;
    }

    .site-header .menu-toggle {
        display: grid;
        gap: 4px;
        width: 44px;
        height: 44px;
        padding: 10px;
        border: 0;
        background: transparent;
    }

    .site-header .menu-toggle span:not(.sr-only) {
        height: 2px;
        background: var(--c-navy);
        border-radius: 99px;
        transition: transform var(--transition), opacity var(--transition);
    }

    .site-header .menu-toggle[aria-expanded="true"] span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .site-header .menu-toggle[aria-expanded="true"] span:nth-child(2) {
        opacity: 0;
    }

    .site-header .menu-toggle[aria-expanded="true"] span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

    .site-header .mobile-nav {
        display: grid;
        position: fixed;
        top: 82px;
        left: var(--gutter);
        right: var(--gutter);
        padding: 12px;
        border: 1px solid var(--c-line);
        border-radius: 20px;
        background: rgba(255,255,255,.98);
        box-shadow: var(--shadow-md);
        opacity: 0;
        transform: translateY(-12px);
        pointer-events: none;
        transition: all var(--transition);
    }

    .site-header .mobile-nav.is-open {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .site-header .mobile-nav a {
        padding: 13px 14px;
        border-radius: 12px;
        font-weight: 700;
    }

    .site-header .mobile-nav a:not(.nav-login):hover {
        background: var(--c-soft);
    }

    .site-header .mobile-nav .nav-login {
        margin-top: 5px;
        text-align: center;
    }
}

@media (max-width: 680px) {
    .site-header .site-header-inner {
        min-height: 72px;
    }

    .site-header .mobile-nav {
        top: 72px;
    }

    .site-header .brand-mark {
        width: 38px;
        height: 38px;
        border-radius: 12px;
    }

    .site-header .brand-copy strong {
        font-size: 15px;
    }

    .site-header .brand-copy {
        font-size: 13px;
    }
}