:root {
    --font-family: "Poppins", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 30;

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 20px 24px;

    pointer-events: none;
}

.site-header > * {
    pointer-events: auto;
}

.site-title {
    color: var(--page-fg, #ffffff);
    text-decoration: none;
    font-family: var(--font-family);
    font-size: 25px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.9;
    transition: opacity 150ms ease, color 150ms ease;
}

.site-title:hover,
.site-title:focus-visible {
    opacity: 1;
}

.menu {
    position: relative;
}

.menu-toggle {
    width: 44px;
    height: 44px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;

    border: 0;
    border-radius: 50%;

    background: rgba(0, 0, 0, 0.25);
    cursor: pointer;

    transition: background 150ms ease;
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
    background: rgba(0, 0, 0, 0.5);
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: #ffffff;
    border-radius: 1px;
}

.menu-list {
    position: absolute;
    top: 100%;
    right: 0;
    margin: 0;
    padding: 18px 0 10px;

    list-style: none;

    min-width: 160px;

    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
    border-radius: 8px;

    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;

    transition: opacity 150ms ease, transform 150ms ease;
}

.menu:hover .menu-list,
.menu:focus-within .menu-list,
.menu.open .menu-list {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.menu-list li {
    margin: 0;
}

.menu-list a {
    display: block;
    padding: 10px 20px;

    color: #ffffff;
    text-decoration: none;
    font-family: var(--font-family);
    font-size: 14px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.menu-list a:hover,
.menu-list a:focus-visible {
    background: rgba(255, 255, 255, 0.08);
}

.menu-list a.active {
    background: rgba(255, 255, 255, 0.12);
    font-weight: 600;
}