.site-header {
    position: fixed;
    top: 0;
    z-index: 100;
    width: 100%;
    background-color: transparent;
    font-family: 'Manrope', 'Avenir Next', 'Helvetica Neue', Arial, sans-serif;
    transition: background-color 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    background: linear-gradient(to bottom, rgba(5, 15, 26, 0.72), transparent);
    opacity: 1;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.site-header::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 2;
    height: 1px;
    background: rgba(7, 21, 35, 0.1);
    opacity: 0;
    pointer-events: none;
}

.site-header .container {
    position: relative;
    z-index: 1;
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

.site-header nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 78px;
    padding: 1.25rem 0;
    transition: min-height 0.3s ease, padding 0.3s ease;
}

.site-header .logo {
    color: white;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    opacity: 0;
    visibility: hidden;
    text-decoration: none;
    transform: translateY(-4px);
    pointer-events: none;
    transition: color 0.3s ease, opacity 0.3s ease, transform 0.3s ease, visibility 0s linear 0.3s;
}

.site-header .nav-links {
    display: flex;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-header .nav-links li {
    margin-left: 2.25rem;
}

.site-header .nav-links a {
    position: relative;
    color: white;
    font-size: 0.92rem;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s ease, opacity 0.3s ease;
}

.site-header .logo:hover,
.site-header .nav-links a:hover {
    opacity: 1;
}

.site-header .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: white;
    transition: width 0.3s ease;
}

.site-header .nav-links a:hover::after,
.site-header .nav-links a[aria-current='page']::after {
    width: 100%;
}

.site-header .menu-toggle {
    display: none;
    padding: 0.4rem;
    border: 0;
    background: none;
    cursor: pointer;
}

.site-header.is-scrolled {
    background-color: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.site-header.has-divider {
    box-shadow: 0 10px 30px rgba(7, 21, 35, 0.08);
}

.site-header.has-divider::after {
    opacity: 1;
}

.site-header.is-scrolled::before {
    opacity: 0;
}

.site-header.is-scrolled nav {
    min-height: 64px;
    padding: 0.8rem 0;
}

.site-header.is-scrolled .logo,
.site-header.is-scrolled .nav-links a {
    color: #071523;
}

.site-header.is-scrolled .logo {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
    transition-delay: 0s;
}

.site-header.is-scrolled .nav-links a::after {
    background: #335384;
}

@media screen and (max-width: 768px) {
    .site-header nav {
        min-height: 68px;
    }

    .site-header .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        z-index: 200;
        width: min(82%, 360px);
        height: 100svh;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 4rem 0;
        background: rgba(5, 15, 26, 0.98);
        box-shadow: -12px 0 40px rgba(0, 0, 0, 0.35);
        transition: right 0.3s ease;
    }

    .site-header .nav-links.active {
        right: 0;
    }

    .site-header .nav-links li {
        margin: 1.25rem 0;
    }

    .site-header .nav-links a,
    .site-header.is-scrolled .nav-links a {
        color: white;
        font-size: 1.35rem;
    }

    .site-header .menu-toggle {
        position: relative;
        z-index: 201;
        display: block;
    }

    .site-header .menu-toggle span {
        display: block;
        width: 25px;
        height: 2px;
        margin: 5px 0;
        background-color: white;
        transition: background-color 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
    }

    .site-header.is-scrolled .menu-toggle span {
        background-color: #071523;
    }

    .site-header.is-scrolled .menu-toggle.active span {
        background-color: white;
    }

    .site-header .menu-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .site-header .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .site-header .menu-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .site-header,
    .site-header::before,
    .site-header nav,
    .site-header .logo,
    .site-header .nav-links,
    .site-header .menu-toggle span {
        transition: none;
    }
}