.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    transition:
        background-color 0.35s ease,
        box-shadow 0.35s ease,
        backdrop-filter 0.35s ease,
        border-color 0.35s ease;
    border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
    background: rgba(7, 11, 8, 0.78);
    backdrop-filter: blur(16px);
    box-shadow: 0 18px 38px rgba(0, 0, 0, 0.24);
    border-color: rgba(197, 217, 77, 0.12);
}

.header-shell {
    min-height: var(--header-height);
    display: grid;
    grid-template-columns: auto auto;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
}

.brand {
    position: relative;
    justify-self: start;
    padding-right: 0;
    transform: translateX(14px);
    display: inline-flex;
    align-items: center;
    min-height: 60px;
}

.brand img {
    height: 82px;
    width: auto;
    object-fit: contain;
    filter: brightness(1.18) contrast(1.18) drop-shadow(0 8px 20px rgba(0, 0, 0, 0.28));
}

.header-actions {
    justify-self: end;
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-cta {
    display: none;
    min-width: 132px;
    font-weight: 700;
}

.menu-toggle {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    border: 1px solid rgba(197, 217, 77, 0.18);
    background: rgba(255, 255, 255, 0.03);
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    color: var(--text);
}

.menu-toggle span {
    width: 20px;
    height: 2px;
    background: currentColor;
    border-radius: 999px;
    transition: transform 0.35s ease, opacity 0.35s ease;
}

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

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

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

.site-nav {
    position: fixed;
    inset: var(--header-height) 16px auto;
    display: grid;
    gap: 8px;
    padding: 16px;
    background: rgba(11, 17, 13, 0.98);
    border: 1px solid rgba(197, 217, 77, 0.14);
    border-radius: 24px;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition:
        opacity 0.35s ease,
        transform 0.35s ease,
        visibility 0.35s ease;
}

.site-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.site-nav a {
    position: relative;
    padding: 12px 10px;
    color: var(--muted);
    font-weight: 500;
    border-radius: 14px;
    transition: color 0.35s ease, background-color 0.35s ease;
}

.site-nav a::after {
    content: "";
    position: absolute;
    right: 50%;
    bottom: 8px;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--brand-strong), var(--brand));
    border-radius: 999px;
    transform: translateX(50%);
    transition: width 0.35s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
    color: var(--text);
    background: rgba(255, 255, 255, 0.03);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.is-active::after {
    width: calc(100% - 26px);
}

.site-nav a.is-active {
    color: var(--brand-strong);
}

@media (min-width: 768px) {
    .header-shell {
        grid-template-columns: auto 1fr auto;
    }

    .brand {
        padding-right: 18px;
        transform: none;
    }

    .brand img {
        height: 105px;
    }

    .header-cta {
        display: inline-flex;
    }

    .menu-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        inset: auto;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: transparent;
        border: 0;
        border-radius: 0;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 22px;
    }

    .site-nav a {
        padding: 10px 4px;
    }
}