:root {
    /* JS оновить реальним значенням */
    --header-h: 102px;
}

/* Щоб контент не залазив під fixed header */
body {
    padding-top: var(--header-h);
}

/* ===== Sticky header ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;

    z-index: 1200;

    background: rgb(248, 248, 250, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);

    border-bottom: 1px solid transparent;
    box-shadow: 0 0 0 rgba(0, 0, 0, 0);

    transition: box-shadow 180ms ease, border-color 180ms ease, background 180ms ease;

    /* прибираємо старе, бо fixed + body padding-top */
    margin-bottom: 0;
}

/* Стан при скролі (JS додає header.is-stuck) */
header.is-stuck {
    background: rgb(248, 248, 250, 0.92);
    border-bottom-color: rgba(0, 0, 0, 0.08);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.03);
}

header.is-stuck .site-nav {
    padding-top: 0;
    transition: all 0.2s;
}

header.is-stuck .logo {
    transform: scale(0.86);
    transition: all 0.2s;
}

.logo {
    transition: all 0.2s;
}

/* ===== Nav base ===== */
.site-nav {
    padding-top: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;

    position: relative;
    /* anchor for dropdown */

    /* тримаємо стабільну висоту хедера */
    min-height: 72px;
    transition: all 0.2s;
}

/* ===== Burger button (always visible) ===== */
.burger-btn {
    width: 44px;
    height: 44px;
    border: 0;
    background: transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: inherit;
}

.burger-btn:focus-visible {
    outline: 2px solid #3B2F2F;
    outline-offset: 3px;
    border-radius: 10px;
}

/* ===== Burger icon => X when open ===== */
.burger-icon {
    position: relative;
    display: block;
    width: 23px;
    height: 3px;
    background: #3B2F2F;
    border-radius: 999px;
}

.burger-icon::before,
.burger-icon::after {
    content: "";
    position: absolute;
    left: 0;
    width: 23px;
    height: 3px;
    background: #3B2F2F;
    border-radius: 999px;
    transition: transform 180ms ease, opacity 180ms ease;
}

.burger-icon::before {
    transform: translateY(-10px);
}

.burger-icon::after {
    transform: translateY(10px);
}

.burger-btn[aria-expanded="true"] .burger-icon {
    background: transparent;
}

.burger-btn[aria-expanded="true"] .burger-icon::before {
    transform: rotate(45deg);
}

.burger-btn[aria-expanded="true"] .burger-icon::after {
    transform: rotate(-45deg);
}

/* ===== Dropdown menu (works for desktop + mobile) ===== */
header .menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;

    width: min(320px, calc(100vw - 32px));
    background: #fff;
    border-radius: 14px;
    padding: 10px;

    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);

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

    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;

    /* над хедером та під ним */
    z-index: 1300;
}

header .menu.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.menu-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.menu-list li {
    margin-left: 0;
    margin-bottom: 5px;
}

.menu-link {
    font-family: "Inter";
    display: block;
    padding: 10px 12px;
    border-radius: 12px;
    text-decoration: none;
    color: #3B2F2F;
    line-height: 1.2;
}

.menu-link:hover,
.menu-link:focus-visible {
    background: rgba(0, 0, 0, 0.06);
    outline: none;
}

/* Мобілка: трішки нижча шапка */
@media (max-width: 520px) {
    .site-nav {
        min-height: 64px;
    }
}

@media (prefers-reduced-motion: reduce) {

    header,
    header .menu,
    .burger-icon::before,
    .burger-icon::after {
        transition: none;
    }
}