/**
 * Sticky Sidebar — «На этой странице» навигация со scroll-spy (Sprint S8).
 *
 * Mobile (< 1024px): горизонтальный scroll chips.
 * Desktop (>= 1024px): position sticky в grid-колонке.
 *
 * Классы: sk-sidebar, sk-sidebar__inner/eyebrow/title/nav/list/item/link/dot/label
 * Modifier: sk-sidebar__link--active (добавляется JS scroll-spy)
 *
 * @package SchoolKarjera
 * @since   8.0.0
 */

/* -------- Mobile default: horizontal chips -------- */
.sk-sidebar {
    margin-bottom: var(--sp-8);
    padding: var(--sp-4) 0;
}

.sk-sidebar__inner {
    display: flex;
    flex-direction: column;
    gap: var(--sp-4);
}

.sk-sidebar__eyebrow {
    display: block;
    font-size: var(--fs-12);
    font-weight: 600;
    letter-spacing: var(--ls-ultra);
    text-transform: uppercase;
    color: var(--color-accent);
}

.sk-sidebar__title {
    margin: 0;
    font-family: var(--sk-font-heading);
    font-size: var(--fs-18);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text-primary);
}

.sk-sidebar__nav {
    /* Nav wrapper — chips overflow контейнер */
    margin: 0 calc(var(--sp-4) * -1);
    padding: 0 var(--sp-4);
}

.sk-sidebar__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: row;
    gap: var(--sp-2);
    overflow-x: auto;
    padding-bottom: var(--sp-2);
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.sk-sidebar__item {
    flex-shrink: 0;
}

.sk-sidebar__link {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    padding: var(--sp-2) var(--sp-4);
    min-height: 36px;
    white-space: nowrap;
    font-size: var(--fs-14);
    color: var(--color-text-secondary);
    text-decoration: none;
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-sm);
    transition:
        color var(--dur-fast) var(--ease-out),
        border-color var(--dur-fast) var(--ease-out),
        background-color var(--dur-fast) var(--ease-out);
}

.sk-sidebar__link:hover {
    color: var(--color-text-primary);
    border-color: var(--color-accent);
}

.sk-sidebar__link:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.sk-sidebar__dot {
    width: 6px;
    height: 6px;
    flex-shrink: 0;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--color-border-subtle);
    transition:
        background-color var(--dur-fast) var(--ease-out),
        border-color var(--dur-fast) var(--ease-out),
        transform var(--dur-fast) var(--ease-out);
}

.sk-sidebar__link--active {
    color: var(--color-accent);
    font-weight: 600;
    border-color: var(--color-accent);
}

.sk-sidebar__link--active .sk-sidebar__dot {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: scale(1.2);
}

/* -------- Desktop: vertical sticky sidebar -------- */
@media (min-width: 1024px) {
    .sk-sidebar {
        position: sticky;
        top: calc(var(--nav-scrolled-height, 80px) + var(--sp-8));
        align-self: start;
        width: 100%;
        max-width: 260px;
        margin-bottom: 0;
        padding: 0;
    }

    .sk-sidebar__nav {
        margin: 0;
        padding: 0;
    }

    .sk-sidebar__list {
        flex-direction: column;
        gap: var(--sp-1);
        overflow: visible;
        padding-bottom: 0;
    }

    .sk-sidebar__item {
        width: 100%;
    }

    .sk-sidebar__link {
        display: flex;
        width: 100%;
        min-height: 32px;
        padding: var(--sp-2) 0;
        white-space: normal;
        gap: var(--sp-3);
        border: none;
        border-radius: 0;
        background: transparent;
    }

    .sk-sidebar__link:hover {
        border: none;
        background: transparent;
    }

    .sk-sidebar__link:focus-visible {
        outline-offset: 4px;
    }

    .sk-sidebar__link--active {
        border: none;
    }
}

/* -------- Reduced motion -------- */
@media (prefers-reduced-motion: reduce) {
    .sk-sidebar__link,
    .sk-sidebar__dot {
        transition: none;
    }

    .sk-sidebar__link--active .sk-sidebar__dot {
        transform: none;
    }
}