/* ==========================================================
   Каркас: контейнер, шапка, меню, секции, подвал
   ========================================================== */

.container {
    width: 100%;
    max-width: calc(var(--container) + var(--gutter) * 2);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.container.narrow {
    max-width: calc(820px + var(--gutter) * 2);
}

/* --- Шапка --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(16, 33, 75, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: box-shadow 0.3s ease;
}

.site-header.is-scrolled {
    box-shadow: 0 10px 30px -18px rgba(0, 0, 0, 0.6);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    min-height: var(--header-h);
}

/* Логотип */
.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--white);
    text-decoration: none;
}

.logo__mark {
    width: 34px;
    height: 34px;
    color: var(--cobalt);
}

.logo__text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    font-stretch: 85%;
    letter-spacing: -0.01em;
}

/* Меню */
.site-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.site-nav__list {
    display: flex;
    gap: 1.75rem;
}

.site-nav__link {
    position: relative;
    color: rgba(255, 255, 255, 0.82);
    font-weight: 500;
    text-decoration: none;
    padding-block: 0.4rem;
}

.site-nav__link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: var(--signal);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s ease;
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
    color: var(--white);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
    transform: scaleX(1);
}

.site-nav__actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-switch {
    display: inline-grid;
    place-items: center;
    min-width: 44px;
    height: 36px;
    padding-inline: 0.6rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 999px;
    color: var(--white);
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    transition: border-color 0.2s, background 0.2s;
}

.lang-switch:hover {
    border-color: var(--white);
    background: rgba(255, 255, 255, 0.08);
}

/* Кнопка мобильного меню */
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    place-items: center;
    background: none;
    border: 0;
    color: var(--white);
    cursor: pointer;
}

.nav-toggle__close {
    display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__open {
    display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__close {
    display: block;
}

@media (max-width: 960px) {
    .nav-toggle {
        display: grid;
    }

    .site-nav {
        position: fixed;
        inset: var(--header-h) 0 auto 0;
        flex-direction: column;
        align-items: stretch;
        gap: 1.5rem;
        padding: 1.5rem var(--gutter) 2rem;
        background: var(--ink);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        transform: translateY(-110%);
        visibility: hidden;
        transition: transform 0.3s ease, visibility 0.3s;
    }

    .site-nav.is-open {
        transform: translateY(0);
        visibility: visible;
    }

    .site-nav__list {
        flex-direction: column;
        gap: 0;
    }

    .site-nav__link {
        display: block;
        padding-block: 0.85rem;
        font-size: 1.15rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .site-nav__link::after {
        display: none;
    }

    .site-nav__link[aria-current="page"] {
        color: var(--signal);
    }

    .site-nav__actions {
        justify-content: space-between;
    }
}

/* --- Секции --- */
.section {
    padding-block: clamp(4rem, 8vw, 6.5rem);
}

.section--tint {
    background: var(--paper);
}

.section-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 1.5rem 4rem;
    align-items: end;
    margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

.section-title {
    font-size: clamp(1.9rem, 3.6vw, 2.75rem);
    font-stretch: 88%;
    letter-spacing: -0.015em;
    margin-bottom: 1.25rem;
}

.section-head .section-title {
    margin-bottom: 0;
}

.section-intro {
    color: var(--muted);
    font-size: 1.125rem;
    max-width: 56ch;
}

.section-more {
    margin-top: 2.5rem;
}

.split {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: start;
}

@media (max-width: 860px) {
    .section-head,
    .split {
        grid-template-columns: 1fr;
    }
}

/* --- Заголовок внутренних страниц --- */
.page-hero {
    position: relative;
    overflow: hidden;
    padding-block: clamp(3rem, 7vw, 5rem) clamp(3rem, 6vw, 4.5rem);
    background: var(--ink);
    color: rgba(255, 255, 255, 0.85);
}

.page-hero::before {
    /* Сетка «карты маршрутов» на фоне */
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: linear-gradient(90deg, transparent, #000 60%);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 60%);
    pointer-events: none;
}

.page-hero .container {
    position: relative;
}

.page-hero__title {
    color: var(--white);
    font-size: clamp(2.4rem, 5.5vw, 4rem);
    font-stretch: 82%;
    letter-spacing: -0.02em;
    max-width: 18ch;
}

.page-hero__intro {
    margin-top: 1.25rem;
    font-size: 1.15rem;
    max-width: 60ch;
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.breadcrumbs li + li::before {
    content: "/";
    margin-right: 0.5rem;
    color: rgba(255, 255, 255, 0.4);
}

.breadcrumbs a {
    color: rgba(255, 255, 255, 0.75);
}

.breadcrumbs [aria-current] {
    color: var(--signal);
}

/* --- Полоса с призывом к действию --- */
.cta-band {
    background: var(--cobalt);
    color: var(--white);
    padding-block: clamp(3rem, 6vw, 4.5rem);
}

.cta-band__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.cta-band__title {
    color: var(--white);
    font-size: clamp(1.7rem, 3.2vw, 2.4rem);
    font-stretch: 85%;
}

.cta-band__text {
    margin-top: 0.75rem;
    max-width: 58ch;
    color: rgba(255, 255, 255, 0.88);
}

@media (max-width: 760px) {
    .cta-band__inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* --- Подвал --- */
.site-footer {
    background: var(--ink-deep);
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.95rem;
    padding-top: clamp(3.5rem, 6vw, 5rem);
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 1fr 1.3fr;
    gap: 2.5rem;
}

.site-footer__brand p {
    margin-top: 1rem;
    max-width: 34ch;
}

.site-footer__title {
    color: var(--white);
    font-size: 1.05rem;
    margin-bottom: 1rem;
}

.site-footer__links {
    display: grid;
    gap: 0.55rem;
}

.site-footer a {
    color: rgba(255, 255, 255, 0.78);
    text-decoration: none;
}

.site-footer a:hover {
    color: var(--signal);
}

.site-footer__contact {
    display: grid;
    gap: 0.65rem;
}

.site-footer__contact a,
.site-footer__contact span {
    display: flex;
    gap: 0.6rem;
    align-items: flex-start;
    overflow-wrap: anywhere;
}

.site-footer__contact .icon {
    width: 1.15rem;
    height: 1.15rem;
    margin-top: 0.2rem;
    color: var(--signal);
}

.site-footer__legal-data {
    margin-top: 1.25rem;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.55);
}

.social {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.social a {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
}

.social .icon {
    width: 1.2rem;
    height: 1.2rem;
}

.site-footer__bottom {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 3.5rem;
    padding-block: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 900px) {
    .site-footer__grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 540px) {
    .site-footer__grid {
        grid-template-columns: 1fr;
    }
}