/**
 * Site header
 */

.site-header {
    position: sticky;
    top: 0;
    z-index: 200;
    background-color: var(--color-primary-700);
    color: var(--color-bg);
}

.site-header__inner {
    display: flex;
    align-items: center;
    gap: var(--space-l);
    width: 100%;
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

/* ---- Brand / Logo ---- */

.site-header__brand {
    display: flex;
    align-items: center;
    gap: var(--space-s);
    padding-block: var(--space-s);
    margin-right: auto;
}

.site-header__brand a {
    display: flex;
    align-items: center;
    gap: var(--space-s);
    font-size: var(--size-step-1);
    font-weight: 600;
    letter-spacing: 0.01em;
    text-decoration: none;
    color: var(--color-bg);
}

.site-header__logo {
    width: 2.75rem;
    height: auto;
    object-fit: contain;
    flex-shrink: 0;
}

@media (max-width: 72em) {
    .site-header__brand a {
        font-size: var(--size-step--1);
    }

    .site-header__logo {
        width: 2rem;
    }
}

/* ---- Hamburger toggle ---- */

.site-nav__toggle {
    display: none;
    background: none;
    border: 0;
    padding: 0.5rem;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 24px;
    height: 24px;
}

.hamburger__line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-bg);
    border-radius: 1px;
    transition:
        transform 300ms ease,
        opacity 300ms ease;
    transform-origin: center;
}

/* Hamburger → X animation */
.site-nav__toggle[aria-expanded="true"] .hamburger__line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .hamburger__line:nth-child(2) {
    opacity: 0;
}

.site-nav__toggle[aria-expanded="true"] .hamburger__line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---- Desktop navigation ---- */

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--space-m);
}

.site-nav__overlay {
    display: none;
}

.site-nav__sidebar {
    display: contents;
}

/* ---- Actions (lang switch + hamburger) ---- */

.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-s);
    flex-shrink: 0;
}

.site-nav__list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-nav__list > li > a {
    display: block;
    padding: 1rem 1.25rem;
    color: var(--color-primary-100);
    font-size: var(--size-step--1);
    font-weight: 400;
    text-decoration: none;
    white-space: nowrap;
    transition:
        color var(--transition-base),
        background-color var(--transition-base);
}

.site-nav__list > li > a:hover {
    color: var(--color-bg);
    background-color: oklch(0.38 0.04 140 / 0.5);
}

/* ---- Active state (server-rendered by WordPress) ---- */

.site-nav__list > .current-menu-item > a,
.site-nav__list > .current-menu-parent > a,
.site-nav__list > .current-menu-ancestor > a,
.site-nav__list > .current_page_item > a,
.site-nav__list > .current_page_parent > a,
.site-nav__list > .current_page_ancestor > a {
    color: var(--color-bg);
    background-color: oklch(0.42 0.04 140 / 0.45);
}

/* ---- Dropdown indicators ---- */

.site-nav__list > .menu-item-has-children > a::after {
    content: "";
    display: inline-block;
    width: 0.35em;
    height: 0.35em;
    margin-left: 0.5em;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: translateY(-0.15em) rotate(45deg);
    vertical-align: middle;
    transition: transform var(--transition-base);
}

.site-nav__list > .menu-item-has-children:hover > a::after,
.site-nav__list > .menu-item-has-children:focus-within > a::after,
.site-nav__list > .menu-item-has-children.is-open > a::after {
    transform: translateY(-0.15em) rotate(225deg);
}

/* ---- Dropdown menu ---- */

.site-nav__list > .menu-item-has-children {
    position: relative;
}

.site-nav__list .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 100;
    min-width: 18rem;
    padding: var(--space-xs) 0;
    list-style: none;
    background-color: var(--color-primary-700);
    border-top: 2px solid var(--color-primary-500);
    box-shadow: 0 4px 12px oklch(0 0 0 / 0.25);
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
}

.site-nav__list > .menu-item-has-children:hover > .sub-menu,
.site-nav__list > .menu-item-has-children:focus-within > .sub-menu,
.site-nav__list > .menu-item-has-children.is-open > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.site-nav__list .sub-menu a {
    display: block;
    padding: 0.5rem 1.25rem;
    color: var(--color-primary-100);
    font-size: var(--size-step--2);
    text-decoration: none;
    transition:
        color var(--transition-base),
        background-color var(--transition-base);
}

.site-nav__list .sub-menu a:hover {
    color: var(--color-bg);
    background-color: oklch(0.38 0.04 140 / 0.5);
}

.site-nav__list .sub-menu .current-menu-item > a {
    color: var(--color-bg);
    background-color: oklch(0.42 0.04 140 / 0.45);
}

/* ================================================================
   Mobile / Tablet — Sidebar navigation
   ================================================================

   IMPORTANT: No transitions in this media query.
   Transitions are enabled exclusively via .site-nav--animated
   (added by JS on user interaction, removed on breakpoint change)
   to prevent flicker when crossing the breakpoint.
   ================================================================ */

@media (max-width: 72em) {
    .site-nav__toggle {
        display: block;
    }

    /* Overlay — below the header, hidden by default */
    .site-nav__overlay {
        display: block;
        position: fixed;
        top: var(--header-height, 3.75rem);
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 149;
        background-color: oklch(0 0 0 / 0.45);
        opacity: 0;
        visibility: hidden;
    }

    .site-nav__overlay.is-active {
        opacity: 1;
        visibility: visible;
    }

    /* Sidebar — below the header, off-screen right */
    .site-nav__sidebar {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: var(--header-height, 3.75rem);
        right: 0;
        bottom: 0;
        z-index: 150;
        width: 100%;
        max-width: 100%;
        background-color: var(--color-primary-800);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        transform: translateX(100%);
        visibility: hidden;
    }

    .site-nav__sidebar.is-open {
        transform: translateX(0);
        visibility: visible;
    }

    /* List inside sidebar */
    .site-nav__list {
        flex-direction: column;
        padding: var(--space-m) 0;
    }

    .site-nav__list > li > a {
        padding: 0.875rem var(--space-l);
        font-size: var(--size-step-0);
        border-bottom: 1px solid oklch(1 0 0 / 0.07);
    }

    /* Dropdown parent links — push chevron to the right */
    .site-nav__list > .menu-item-has-children > a {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .site-nav__list > .menu-item-has-children > a::after {
        margin-left: auto;
        margin-right: 0;
        transform: rotate(-135deg);
    }

    .site-nav__list > .menu-item-has-children.is-open > a::after {
        transform: rotate(45deg);
    }

    /* Active state in sidebar */
    .site-nav__list > .current-menu-item > a,
    .site-nav__list > .current-menu-parent > a,
    .site-nav__list > .current-menu-ancestor > a,
    .site-nav__list > .current_page_item > a,
    .site-nav__list > .current_page_parent > a,
    .site-nav__list > .current_page_ancestor > a {
        background-color: oklch(0.42 0.04 140 / 0.35);
    }

    /* Sub-menus — override desktop transitions, collapsed by default */
    .site-nav__list .sub-menu {
        position: static;
        max-height: 0;
        overflow: hidden;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border-top: 0;
        padding: 0;
        background-color: oklch(0 0 0 / 0.12);
        transition: none;
    }

    .menu-item-has-children.is-open > .sub-menu {
        max-height: 30rem;
    }

    .site-nav__list .sub-menu a {
        padding: 0.75rem var(--space-l) 0.75rem var(--space-xl);
        font-size: var(--size-step--1);
        border-bottom: 1px solid oklch(1 0 0 / 0.04);
    }
}

/* Tablet — narrower sidebar with overlay visible */
@media (min-width: 30em) and (max-width: 72em) {
    .site-nav__sidebar {
        width: 40%;
        min-width: 18rem;
        max-width: 22rem;
    }
}

/* ================================================================
   Animated state — enabled by JS on user interaction only.
   This keeps transitions OFF during breakpoint crossing.
   ================================================================ */

.site-nav--animated .site-nav__sidebar {
    transition:
        transform 350ms cubic-bezier(0.4, 0, 0.2, 1),
        visibility 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

.site-nav--animated .site-nav__overlay {
    transition:
        opacity 300ms ease,
        visibility 300ms ease;
}

.site-nav--animated .site-nav__list .sub-menu {
    transition:
        opacity var(--transition-base),
        visibility var(--transition-base),
        transform var(--transition-base),
        max-height 300ms ease;
}

.site-nav--animated .site-nav__list > .menu-item-has-children > a::after {
    transition: transform 300ms ease;
}

/* ---- Language switcher ---- */

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}

.lang-switch__link {
    display: block;
    padding: 0.25rem 0.35rem;
    font-size: var(--size-step--2);
    font-weight: 600;
    letter-spacing: 0.04em;
    text-decoration: none;
    color: var(--color-primary-200, oklch(0.8 0.03 140));
    border-radius: 3px;
    transition:
        color var(--transition-base),
        background-color var(--transition-base);
}

.lang-switch__link:hover {
    color: var(--color-bg);
}

.lang-switch__link.is-active {
    color: var(--color-bg);
    background-color: oklch(1 0 0 / 0.15);
}

.lang-switch__sep {
    color: oklch(1 0 0 / 0.3);
    font-size: var(--size-step--2);
    user-select: none;
}

/* Body scroll lock when menu is open */
body.menu-is-open {
    overflow: hidden;
}