/* ═══════════ Logo ═══════════ */
.site-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-right: auto;
    color: var(--color-heading);
}

.site-logo__mark {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.site-logo__name {
    display: block;
    font-size: var(--text-md);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.01em;
}

.site-logo__tagline {
    display: block;
    font-size: 11px;
    font-weight: 500;
    line-height: 1.3;
    color: var(--color-text-muted);
}

/* ═══════════ Header ═══════════ */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow var(--transition);
}

.site-header.is-scrolled {
    box-shadow: var(--shadow-md);
}

/* backdrop-filter создаёт containing block, из-за чего fixed-оверлей меню
   считался бы от шапки, а не от viewport. */
body.is-menu-open .site-header {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.site-header__inner {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    height: var(--header-h);
}

.site-header__cta {
    padding: 0 var(--space-4);
    min-height: 36px;
    font-size: var(--text-sm);
}

.site-header__cta .btn__arrow {
    display: none;
}

/* ═══════════ Main nav ═══════════ */
.site-nav__list {
    display: none;
}

.site-nav__list.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: var(--header-h) 0 0 0;
    padding: var(--space-2) var(--container-pad) var(--space-7);
    background: var(--color-surface);
    overflow-y: auto;
    z-index: var(--z-nav);
    animation: navSlideIn 0.22s ease;
}

.site-nav__list.is-open li {
    border-bottom: 1px solid var(--color-border);
}

.site-nav__list.is-open li:last-child {
    border-bottom: 0;
}

.site-nav__list.is-open a {
    display: flex;
    align-items: center;
    padding: var(--space-4) 0;
    font-size: 17px;
    font-weight: 600;
    color: var(--color-heading);
}

.site-nav__list.is-open a:hover {
    color: var(--color-primary);
}

@keyframes navSlideIn {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════ Burger ═══════════ */
.burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    align-items: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.burger span {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--color-heading);
    transition: transform var(--transition), opacity var(--transition);
}

.burger.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.burger.is-active span:nth-child(2) {
    opacity: 0;
}

.burger.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ═══════════ Footer ═══════════ */
.site-footer {
    position: relative;
    overflow: hidden;
    background: var(--color-surface-soft);
    border-top: 1px solid var(--color-border-soft);
}

.site-footer::before {
    content: "";
    position: absolute;
    left: -40px;
    bottom: 0;
    width: 460px;
    max-width: 80%;
    height: 300px;
    background: image-set(
            url("../img/dubai-skyline-lineart-orange.avif") type("image/avif"),
            url("../img/dubai-skyline-lineart-orange.webp") type("image/webp")
        ) left bottom / contain no-repeat;
    opacity: 0.08;
    pointer-events: none;
}

.site-footer__inner {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    padding: var(--space-7) 0;
}

.site-footer__brand {
    order: 2;
    max-width: 340px;
}

.site-footer__about {
    margin-top: var(--space-4);
    font-size: var(--text-base);
    color: var(--color-text-muted);
}

.site-footer__contacts {
    margin-top: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.site-footer__contact {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-base);
    color: var(--color-text);
}

.site-footer__contact svg {
    flex-shrink: 0;
    color: var(--color-primary);
}

.site-footer__contact a {
    color: var(--color-text);
}

.site-footer__contact a:hover {
    color: var(--color-primary);
}

.site-footer__nav {
    order: 1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-5);
}

.site-footer__col {
    display: flex;
    flex-direction: column;
}

.site-footer__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding: var(--space-2) 0;
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text);
}

.site-footer__link svg {
    flex-shrink: 0;
    color: var(--color-primary);
    transition: transform var(--transition);
}

.site-footer__link:hover {
    color: var(--color-primary);
}

.site-footer__link:hover svg {
    transform: translateX(3px);
}

.site-footer__bottom {
    position: relative;
    border-top: 1px solid var(--color-border-soft);
    padding: var(--space-4) 0;
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ═══════════ Desktop ═══════════ */
@media (min-width: 900px) {
    :root {
        --header-h: 76px;
    }

    .site-logo {
        gap: var(--space-3);
    }

    .site-logo__mark {
        width: 38px;
        height: 38px;
    }

    .site-logo__name {
        font-size: var(--text-lg);
    }

    .site-logo__tagline {
        font-size: var(--text-xs);
    }

    .site-header__inner {
        gap: var(--space-6);
    }

    .site-header__cta {
        padding: 0 var(--space-6);
        min-height: 48px;
        font-size: var(--text-md);
    }

    .site-header__cta .btn__arrow {
        display: block;
    }

    .burger {
        display: none;
    }

    /* На 900px логотип, пять пунктов и кнопка помещаются в строку
       только при этом шаге — с --space-6 кнопка вылезает за вьюпорт. */
    .site-nav__list {
        display: flex;
        align-items: center;
        gap: var(--space-5);
    }

    .site-nav__list a {
        font-size: var(--text-md);
        font-weight: 500;
        color: var(--color-text);
        white-space: nowrap;
    }

    .site-nav__list a:hover {
        color: var(--color-primary);
    }

    .site-footer::before {
        width: 620px;
        height: 380px;
        opacity: 0.10;
    }

    .site-footer__inner {
        flex-direction: row;
        justify-content: space-between;
        gap: var(--space-8);
        padding: var(--space-8) 0 var(--space-7);
    }

    .site-footer__brand {
        order: 0;
        flex: 0 1 340px;
    }

    .site-footer__nav {
        order: 0;
        flex: 1 1 auto;
        max-width: 520px;
        gap: var(--space-8);
    }
}