.site-header {
    position: relative;
    z-index: 100;
    padding: 18px clamp(18px, 4vw, 64px);
    background:
        radial-gradient(circle at 10% -60%, color-mix(in srgb, var(--fifth-color) 55%, transparent), transparent 45%),
        linear-gradient(115deg, var(--primary-color), color-mix(in srgb, var(--primary-color) 72%, var(--fourth-color)));
    box-shadow: 0 14px 40px color-mix(in srgb, var(--primary-color) 30%, transparent);
    overflow: visible;
}

.site-header::before,
.site-header::after {
    position: absolute;
    content: "";
    pointer-events: none;
    border: 1px solid color-mix(in srgb, var(--white-color) 18%, transparent);
    border-radius: 50%;
}

.site-header::before {
    width: 150px;
    height: 150px;
    top: -100px;
    right: 12%;
}

.site-header::after {
    width: 70px;
    height: 70px;
    bottom: -52px;
    left: 5%;
}

.nav-container {
    width: min(1180px, 100%);
    min-height: 72px;
    margin: 0 auto;
    padding: 9px 10px 9px 16px;
    display: flex;
    align-items: center;
    gap: 28px;
    position: relative;
    border: 1px solid color-mix(in srgb, var(--white-color) 24%, transparent);
    border-radius: 22px;
    background: color-mix(in srgb, var(--black-color) 22%, transparent);
    box-shadow: 0 18px 36px color-mix(in srgb, var(--black-color) 18%, transparent), inset 0 1px 0 color-mix(in srgb, var(--white-color) 18%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.nav-brand {
    margin: 2px 4px 2px 0;
    padding: 3px;
    display: inline-flex;
    align-items: center;
    gap: 13px;
    flex: 0 0 auto;
    color: var(--white-color);
    text-decoration: none;
}

.brand-emblem {
    width: 60px;
    height: 60px;
    padding: 6px;
    box-sizing: border-box;
    display: grid;
    place-items: center;
    border: 1px solid color-mix(in srgb, var(--white-color) 80%, transparent);
    border-radius: 18px;
    color: var(--primary-color);
    background: linear-gradient(145deg, var(--white-color), color-mix(in srgb, var(--fifth-color) 16%, var(--white-color)));
    box-shadow: 0 10px 24px color-mix(in srgb, var(--black-color) 28%, transparent), inset 0 0 0 2px color-mix(in srgb, var(--primary-color) 5%, transparent);
    transition: transform 250ms ease;
    overflow: hidden;
}

.nav-brand:hover .brand-emblem {
    transform: rotate(-4deg) scale(1.04);
}

.brand-emblem img {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 10px;
    object-fit: contain;
    object-position: center;
}

.brand-copy {
    display: grid;
    line-height: .9;
}

.brand-name {
    font-family: "Archivo Black", sans-serif;
    font-size: 1.15rem;
    letter-spacing: .02em;
}

.brand-subtitle {
    margin-top: 7px;
    color: var(--fifth-color);
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .25em;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: clamp(16px, 2.5vw, 34px);
    flex: 1;
}

.navbar {
    display: flex;
    align-items: center;
    gap: clamp(4px, .7vw, 11px);
    margin: 0;
    padding: 0;
    list-style: none;
}

.navbar a {
    position: relative;
    display: block;
    padding: 12px 10px;
    color: color-mix(in srgb, var(--white-color) 82%, transparent);
    font-size: .9rem;
    font-weight: 600;
    text-decoration: none;
    transition: color 180ms ease, transform 180ms ease;
}

.navbar a::after {
    position: absolute;
    content: "";
    left: 50%;
    bottom: 5px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--fifth-color);
    opacity: 0;
    transform: translate(-50%, 5px) scale(0);
    transition: opacity 180ms ease, transform 180ms ease;
}

.navbar a:hover,
.navbar a:focus-visible,
.navbar a.active {
    color: var(--white-color);
    transform: translateY(-1px);
}

.navbar a:hover::after,
.navbar a:focus-visible::after,
.navbar a.active::after {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
}

.donate-button {
    min-height: 48px;
    padding: 0 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    flex: 0 0 auto;
    border-radius: 15px;
    color: var(--black-color);
    background: linear-gradient(135deg, var(--fifth-color), var(--secondary-color));
    box-shadow: 0 9px 20px color-mix(in srgb, var(--black-color) 20%, transparent);
    font-size: .88rem;
    font-weight: 800;
    text-decoration: none;
    transition: transform 180ms ease, box-shadow 180ms ease;
}

.donate-button svg {
    width: 18px;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.8;
    transition: transform 180ms ease;
}

.donate-button:hover,
.donate-button:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 12px 26px color-mix(in srgb, var(--black-color) 28%, transparent);
}

.donate-button:hover svg { transform: translateX(3px); }

.nav-toggle,
.nav-toggle-label {
    display: none;
}

@media (max-width: 900px) {
    .site-header { padding: 14px; }

    .nav-container {
        min-height: 68px;
        padding: 9px 10px 9px 13px;
        border-radius: 19px;
    }

    .brand-emblem {
        width: 54px;
        height: 54px;
        padding: 5px;
        border-radius: 16px;
    }

    .nav-toggle {
        position: absolute;
        display: block;
        width: 1px;
        height: 1px;
        opacity: 0;
        pointer-events: none;
    }

    .nav-toggle-label {
        width: 46px;
        height: 46px;
        margin-left: auto;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 5px;
        border-radius: 14px;
        background: color-mix(in srgb, var(--white-color) 12%, transparent);
        cursor: pointer;
    }

    .nav-toggle-label span {
        width: 20px;
        height: 2px;
        border-radius: 2px;
        background: var(--white-color);
        transition: transform 200ms ease, opacity 200ms ease;
    }

    .nav-menu {
        position: absolute;
        top: calc(100% + 12px);
        left: 0;
        right: 0;
        padding: 12px;
        display: grid;
        gap: 10px;
        border: 1px solid color-mix(in srgb, var(--white-color) 20%, transparent);
        border-radius: 19px;
        background: color-mix(in srgb, var(--primary-color) 88%, var(--black-color));
        box-shadow: 0 20px 34px color-mix(in srgb, var(--black-color) 28%, transparent);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px) scale(.98);
        transform-origin: top;
        transition: opacity 200ms ease, visibility 200ms ease, transform 200ms ease;
    }

    .navbar {
        display: grid;
        gap: 2px;
    }

    .navbar a {
        padding: 12px 14px;
        border-radius: 10px;
    }

    .navbar a::after { display: none; }

    .navbar a:hover,
    .navbar a:focus-visible,
    .navbar a.active {
        background: color-mix(in srgb, var(--white-color) 10%, transparent);
        transform: none;
    }

    .donate-button { width: 100%; }

    .nav-toggle:checked ~ .nav-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0) scale(1);
    }

    .nav-toggle:checked + .nav-toggle-label span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle:checked + .nav-toggle-label span:nth-child(2) { opacity: 0; }
    .nav-toggle:checked + .nav-toggle-label span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .nav-toggle:focus-visible + .nav-toggle-label { outline: 3px solid var(--fifth-color); outline-offset: 3px; }
}

@media (max-width: 380px) {
    .brand-emblem { width: 44px; height: 44px; }
    .brand-name { font-size: 1rem; }
    .brand-subtitle { font-size: .6rem; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}