/* Layer 6: page frame blocks: header, menu, lang switch, footer, breadcrumbs, stepper, empty state. */

/* header */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--c-glass);
    border-bottom: 1px solid var(--c-line);
    backdrop-filter: saturate(1.4) blur(8px);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    min-height: var(--header-h);
}

.header__logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--c-text);
    text-decoration: none;
}

.header__logo:hover {
    color: var(--c-text);
}

.header__logo-img {
    width: 40px;
    height: 40px;
}

.header__brand {
    display: grid;
    font-size: var(--fs-l);
    font-weight: var(--fw-bold);
    line-height: 1.1;
    letter-spacing: var(--ls-heading);
}

.header__tagline {
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    letter-spacing: 0;
    color: var(--c-muted);
}

.header__burger {
    position: relative;
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-m);
    cursor: pointer;
}

.header__burger::before,
.header__burger::after {
    content: "";
    position: absolute;
    left: 11px;
    width: 22px;
    height: 2px;
    background: var(--c-text);
    transition: transform var(--dur) var(--ease);
}

.header__burger::before { top: 16px; box-shadow: 0 6px 0 var(--c-text); }
.header__burger::after { top: 28px; }

.header__toggle:checked ~ .header__burger::before {
    top: 21px;
    box-shadow: none;
    transform: rotate(45deg);
}

.header__toggle:checked ~ .header__burger::after {
    top: 21px;
    transform: rotate(-45deg);
}

.header__toggle:focus-visible ~ .header__burger {
    outline: 2px solid var(--c-primary);
    outline-offset: 2px;
}

.header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: var(--space-4) var(--gutter) var(--space-6);
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-line);
    box-shadow: var(--shadow-m);
}

.header__toggle:checked ~ .header__nav {
    display: grid;
    gap: var(--space-5);
}

.header__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
}

/* menu */
.menu {
    display: grid;
    margin: 0;
    padding: 0;
    list-style: none;
}

.menu__item {
    position: relative;
}

.menu__link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    min-height: 44px;
    padding: var(--space-2) 0;
    border: 0;
    background: none;
    font-size: var(--fs-m);
    font-weight: var(--fw-medium);
    color: var(--c-text);
    text-align: left;
    text-decoration: none;
}

.menu__link:hover,
.menu__link[aria-current="page"] {
    color: var(--c-primary);
}

.menu__item--dropdown > .menu__link::after {
    content: "";
    width: 7px;
    height: 7px;
    margin-top: -3px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
}

.menu__dropdown {
    display: grid;
    margin: 0;
    padding: 0 0 var(--space-2) var(--space-4);
    list-style: none;
}

.menu__sublink {
    display: block;
    padding: var(--space-2) 0;
    color: var(--c-muted);
    text-decoration: none;
}

.menu__sublink:hover,
.menu__sublink[aria-current="page"] {
    color: var(--c-primary);
}

/* lang-switch */
.lang-switch {
    position: relative;
}

.lang-switch__current {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 40px;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--c-line);
    border-radius: var(--radius-m);
    background: var(--c-surface);
    font-size: var(--fs-s);
    font-weight: var(--fw-semibold);
}

.lang-switch__current::after {
    content: "";
    width: 6px;
    height: 6px;
    margin-top: -3px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
}

.lang-switch__list {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: var(--z-dropdown);
    display: none;
    min-width: 180px;
    margin: 0;
    padding: var(--space-2);
    list-style: none;
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--radius-m);
    box-shadow: var(--shadow-m);
}

.lang-switch:hover .lang-switch__list,
.lang-switch:focus-within .lang-switch__list {
    display: grid;
}

.lang-switch__link {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-s);
    color: var(--c-text);
    text-decoration: none;
}

.lang-switch__link:hover {
    background: var(--c-mint);
    color: var(--c-primary);
}

.lang-switch__link[aria-current="true"] {
    color: var(--c-primary);
    font-weight: var(--fw-semibold);
}

.lang-switch__code {
    color: var(--c-muted);
    font-size: var(--fs-xs);
}

@media (min-width: 900px) {
    .header__burger {
        display: none;
    }

    .header__tagline {
        display: none;
    }

    .header__nav,
    .header__toggle:checked ~ .header__nav {
        position: static;
        display: flex;
        align-items: center;
        gap: clamp(var(--space-3), 1.6vw, var(--space-6));
        max-height: none;
        overflow: visible;
        padding: 0;
        background: none;
        border: 0;
        box-shadow: none;
    }

    .menu {
        display: flex;
        gap: clamp(var(--space-3), 1.6vw, var(--space-6));
    }

    .header__actions {
        flex-wrap: nowrap;
    }

    .menu__link {
        width: auto;
        font-size: var(--fs-s);
        white-space: nowrap;
    }

    .menu__dropdown {
        position: absolute;
        top: 100%;
        left: calc(var(--space-3) * -1);
        z-index: var(--z-dropdown);
        display: none;
        min-width: 240px;
        padding: var(--space-2);
        background: var(--c-surface);
        border: 1px solid var(--c-line);
        border-radius: var(--radius-m);
        box-shadow: var(--shadow-m);
    }

    .menu__item--dropdown:hover .menu__dropdown,
    .menu__item--dropdown:focus-within .menu__dropdown {
        display: grid;
    }

    .menu__sublink {
        padding: var(--space-2) var(--space-3);
        border-radius: var(--radius-s);
        color: var(--c-text);
        font-size: var(--fs-s);
    }

    .menu__sublink:hover {
        background: var(--c-mint);
    }

    .lang-switch__list {
        left: auto;
        right: 0;
    }
}

/* breadcrumbs */
.breadcrumbs__list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: var(--fs-xs);
    color: var(--c-muted);
}

.breadcrumbs__item + .breadcrumbs__item::before {
    content: "/";
    margin-right: var(--space-2);
    color: var(--c-line);
}

.breadcrumbs a {
    color: var(--c-muted);
    text-decoration: none;
}

.breadcrumbs a:hover {
    color: var(--c-primary);
}

/* stepper */
.stepper {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin: 0 0 var(--space-6);
    padding: 0;
    list-style: none;
    counter-reset: step;
}

.stepper__item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-pill);
    background: var(--c-mint);
    color: var(--c-muted);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
}

.stepper__num {
    display: inline-grid;
    place-items: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--c-surface);
}

.stepper__item.is-done {
    color: var(--c-primary);
}

.stepper__item.is-current {
    background: var(--c-primary);
    color: var(--c-primary-contrast);
}

.stepper__item.is-current .stepper__num {
    color: var(--c-primary);
}

/* empty-state */
.empty-state {
    display: grid;
    justify-items: center;
    gap: var(--space-4);
    max-width: 560px;
    margin-inline: auto;
    padding: var(--space-7) var(--space-5);
    text-align: center;
}

.empty-state .icon {
    width: 48px;
    height: 48px;
    color: var(--c-primary);
}

.empty-state__title {
    font-size: var(--fs-2xl);
}

.empty-state__text {
    color: var(--c-muted);
}

.empty-state__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3);
}

/* filters (reserved for catalog) */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

/* pagination (reserved for catalog) */
.pagination ul {
    display: flex;
    gap: var(--space-2);
    margin: var(--space-6) 0 0;
    padding: 0;
    list-style: none;
}

.pagination__link {
    display: inline-grid;
    place-items: center;
    min-width: 40px;
    height: 40px;
    border: 1px solid var(--c-line);
    border-radius: var(--radius-m);
    color: var(--c-text);
    text-decoration: none;
}

.pagination__link.is-current {
    background: var(--c-primary);
    border-color: var(--c-primary);
    color: var(--c-primary-contrast);
}

/* footer */
.footer {
    padding-top: var(--space-8);
    background: var(--c-dark);
    color: var(--c-dark-muted);
    font-size: var(--fs-s);
}

.footer a {
    color: var(--c-dark-contrast);
    text-decoration: none;
}

.footer a:hover {
    color: var(--c-mint-2);
    text-decoration: underline;
}

.footer__grid {
    display: grid;
    gap: var(--space-6);
    padding-bottom: var(--space-7);
}

.footer__brand {
    display: grid;
    gap: var(--space-4);
    align-content: start;
}

.footer__logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--fs-l);
    font-weight: var(--fw-bold);
}

.footer__logo img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-s);
    background: var(--c-dark-contrast);
}

.footer__flags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.footer__title {
    margin-bottom: var(--space-3);
    font-size: var(--fs-s);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-caps);
    text-transform: uppercase;
    color: var(--c-dark-contrast);
}

.footer__list {
    display: grid;
    gap: var(--space-2);
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer__bottom {
    padding-block: var(--space-5);
    border-top: 1px solid var(--c-on-dark-line);
    font-size: var(--fs-xs);
}

@media (min-width: 900px) {
    .footer__grid {
        grid-template-columns: 4fr 3fr 3fr 3fr;
        gap: var(--space-7);
    }
}