/* База знаний — layout (публичная) */
@import url('typography.css');
@import url('theme.css');

.kb-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--tg-bg-page);
    color: var(--tg-text-primary);
    /* Увеличенная шкала для комфортного чтения (не трогает остальной фронт) */
    --text-xs: 13px;
    --text-sm: 15px;
    --text-base: 18px;
    --text-md: 19px;
    --text-lg: 22px;
    --text-xl: 26px;
    --text-2xl: 30px;
    --text-3xl: 34px;
    --text-4xl: 38px;
    --text-5xl: 44px;
}

/* Светлая тема: вторичный текст чуть темнее для контраста на мелком кегле */
html:not([data-theme="dark"]) .kb-page {
    --tg-text-secondary: #4b5563;
    --tg-text-muted: #6b7280;
}

.kb-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 24px;
    background: var(--tg-bg-content);
    border-bottom: 1px solid var(--tg-border-light);
    box-shadow: 0 1px 4px var(--tg-shadow);
    flex-wrap: wrap;
}

.kb-header__brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--tg-text-primary);
    font-weight: 700;
    font-size: var(--text-lg);
    flex-shrink: 0;
}

.kb-header__logo {
    height: 36px;
    width: auto;
}

.kb-header__nav {
    display: flex;
    gap: 20px;
    font-size: var(--text-base);
}

.kb-header__nav a {
    color: var(--tg-text-secondary);
    text-decoration: none;
}

.kb-header__nav a:hover,
.kb-header__nav a.kb-header__nav--active {
    color: var(--tg-accent);
}

.kb-header__search-wrap {
    flex: 1;
    min-width: 180px;
    max-width: 360px;
    position: relative;
    margin: 0 auto;
}

.kb-header__search {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--tg-border);
    border-radius: 8px;
    background: var(--tg-bg-input);
    color: var(--tg-text-primary);
    font-family: var(--font-primary);
    font-size: var(--text-base);
}

.kb-header__search:focus {
    outline: none;
    border-color: var(--tg-accent);
    box-shadow: 0 0 0 3px var(--tg-accent-bg);
}

.kb-search-results {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--tg-bg-card);
    border: 1px solid var(--tg-border);
    border-radius: 8px;
    box-shadow: var(--tg-card-shadow);
    max-height: 320px;
    overflow-y: auto;
    z-index: 200;
}

.kb-search-results--visible {
    display: block;
}

.kb-search-results__item {
    display: block;
    padding: 12px 14px;
    text-decoration: none;
    color: var(--tg-text-primary);
    border-bottom: 1px solid var(--tg-border-light);
}

.kb-search-results__item:hover {
    background: var(--tg-accent-bg);
}

.kb-search-results__item strong {
    display: block;
    font-size: var(--text-sm);
}

.kb-search-results__item span {
    font-size: var(--text-xs);
    color: var(--tg-text-muted);
}

.kb-search-results__empty {
    padding: 14px;
    color: var(--tg-text-muted);
    font-size: var(--text-sm);
}

.kb-header__actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.kb-header__login {
    padding: 9px 18px;
    background: var(--tg-accent);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: var(--text-base);
    font-weight: 600;
}

.kb-header__login--cabinet {
    background: var(--tg-bg-input);
    color: var(--tg-text-primary);
    border: 1px solid var(--tg-border);
}

.kb-header__login--desktop {
    display: inline-block;
}

.kb-header__login:hover {
    opacity: 0.9;
}

.kb-theme-toggle {
    border: 1px solid var(--tg-border);
    background: var(--tg-bg-input);
    border-radius: 8px;
    padding: 6px 10px;
    cursor: pointer;
    color: var(--tg-text-primary);
}

.kb-header__theme-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    margin: 0;
    border: 1px solid var(--tg-border);
    background: var(--tg-bg-input);
    border-radius: 10px;
    cursor: pointer;
    color: var(--tg-text-primary);
    flex-shrink: 0;
    line-height: 0;
}

.kb-search-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    margin: 0;
    border: 1px solid var(--tg-border);
    background: var(--tg-bg-input);
    border-radius: 10px;
    cursor: pointer;
    color: var(--tg-text-primary);
    flex-shrink: 0;
    line-height: 0;
}

.kb-header__icon-svg {
    display: block;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.kb-header__theme-btn .kb-header__icon-svg--moon {
    display: none;
}

[data-theme="dark"] .kb-header__theme-btn .kb-header__icon-svg--sun,
.kb-header__theme-btn.theme-toggle--dark .kb-header__icon-svg--sun {
    display: none;
}

[data-theme="dark"] .kb-header__theme-btn .kb-header__icon-svg--moon,
.kb-header__theme-btn.theme-toggle--dark .kb-header__icon-svg--moon {
    display: block;
}

/* Переключатель темы в шапке KB — без стилей сайдбара */
.kb-header .theme-toggle.kb-header__theme-btn {
    padding: 0;
    margin: 0;
    background: var(--tg-bg-input);
    border: 1px solid var(--tg-border);
    border-radius: 10px;
}

.kb-header .theme-toggle.kb-header__theme-btn:hover {
    transform: none;
    opacity: 0.9;
}

.kb-search-toggle.kb-search-toggle--active {
    border-color: var(--tg-accent);
    background: var(--tg-accent-bg);
    color: var(--tg-accent);
}

.kb-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 150;
    background: rgba(15, 23, 42, 0.55);
    opacity: 0;
    transition: opacity 0.25s ease;
    pointer-events: none;
}

.kb-nav__drawer-head,
.kb-nav__drawer-links {
    display: none;
}

.kb-mobile-menu-fab {
    display: none;
}

.kb-layout {
    display: grid;
    grid-template-columns: 260px 1fr 220px;
    flex: 1;
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
    align-items: start;
}

.kb-nav {
    position: sticky;
    top: 72px;
    height: calc(100vh - 72px);
    overflow-y: auto;
    padding: 20px 12px 40px 20px;
    border-right: 1px solid var(--tg-border-light);
}

.kb-nav__section {
    margin-bottom: 8px;
}

.kb-nav__section-head {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    padding: 10px 12px;
    border: none;
    background: transparent;
    color: var(--tg-text-primary);
    font-weight: 600;
    font-size: var(--text-base);
    cursor: pointer;
    text-align: left;
    border-radius: 6px;
    font-family: var(--font-primary);
}

.kb-nav__section-head:hover {
    background: var(--tg-accent-bg);
}

.kb-nav__chevron {
    display: inline-block;
    transition: transform 0.2s;
    color: var(--tg-text-muted);
}

.kb-nav__section--open .kb-nav__chevron {
    transform: rotate(90deg);
}

.kb-nav__section-body {
    display: none;
    padding-left: 8px;
}

.kb-nav__section--open .kb-nav__section-body {
    display: block;
}

.kb-nav__subsection {
    font-size: var(--text-xs);
    color: var(--tg-text-muted);
    padding: 8px 10px 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.kb-nav__articles {
    list-style: none;
    margin: 0;
    padding: 0;
}

.kb-nav__link {
    display: block;
    padding: 8px 12px;
    font-size: var(--text-base);
    color: var(--tg-text-secondary);
    text-decoration: none;
    border-radius: 6px;
    line-height: 1.4;
}

.kb-nav__link:hover {
    color: var(--tg-accent);
    background: var(--tg-accent-bg);
}

.kb-nav__link--active {
    color: var(--tg-accent);
    background: var(--tg-accent-bg);
    font-weight: 600;
    border-radius: 10px;
}

[data-theme="dark"] .kb-nav__link--active {
    background: rgba(88, 166, 255, 0.14);
}

.kb-main {
    padding: 28px 32px 48px;
    min-width: 0;
}

.kb-breadcrumbs {
    font-size: var(--text-sm);
    color: var(--tg-text-muted);
    margin-bottom: 14px;
}

.kb-breadcrumbs a {
    color: var(--tg-accent);
    text-decoration: none;
}

.kb-breadcrumb-sep {
    margin: 0 6px;
    color: var(--tg-text-muted);
}

.kb-article-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    line-height: var(--leading-tight);
    margin: 0 0 24px;
    letter-spacing: var(--tracking-tight);
}

.kb-toc {
    position: sticky;
    top: 72px;
    padding: 20px 20px 40px 12px;
    border-left: 1px solid var(--tg-border-light);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
}

.kb-toc__title {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--tg-text-muted);
    margin: 0 0 12px;
}

.kb-toc__link {
    display: block;
    font-size: var(--text-sm);
    color: var(--tg-text-secondary);
    text-decoration: none;
    padding: 4px 0;
    line-height: 1.4;
    border-left: 2px solid transparent;
    padding-left: 10px;
    margin-left: -2px;
}

.kb-toc__link--l3 {
    padding-left: 20px;
    font-size: var(--text-xs);
}

.kb-toc__link:hover,
.kb-toc__link--active {
    color: var(--tg-accent);
    border-left-color: var(--tg-accent);
}

.kb-loading,
.kb-welcome,
.kb-error {
    color: var(--tg-text-secondary);
    font-size: var(--text-md);
}

.kb-footer {
    padding: 16px 24px;
    text-align: center;
    font-size: var(--text-sm);
    color: var(--tg-text-muted);
    border-top: 1px solid var(--tg-border-light);
}

.kb-footer a {
    color: var(--tg-accent);
}

/* Callout */
.kb-callout {
    padding: 16px 18px;
    border-radius: 12px;
    margin: 20px 0;
    border: 1px solid var(--tg-border-light);
}

.kb-callout--info {
    background: var(--tg-accent-bg);
    border-color: rgba(82, 160, 255, 0.25);
}

.kb-callout--success {
    background: rgba(34, 197, 94, 0.12);
    border-color: rgba(34, 197, 94, 0.3);
}

.kb-callout--warning {
    background: rgba(234, 179, 8, 0.12);
    border-color: rgba(234, 179, 8, 0.35);
}

.kb-callout__title {
    font-weight: 600;
    margin-bottom: 6px;
}

.kb-callout__text {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--tg-text-secondary);
}

/* Action card */
.kb-action-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 18px;
    margin: 16px 0;
    background: var(--tg-bg-card);
    border: 1px solid var(--tg-border);
    border-radius: 12px;
    text-decoration: none;
    color: var(--tg-text-primary);
    box-shadow: var(--tg-card-shadow);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.kb-action-card:hover {
    border-color: var(--tg-accent);
    box-shadow: 0 4px 16px var(--tg-shadow);
}

.kb-action-card__title {
    font-weight: 600;
    font-size: var(--text-md);
}

.kb-action-card__desc {
    font-size: var(--text-sm);
    color: var(--tg-text-secondary);
    margin-top: 4px;
}

.kb-action-card__chevron {
    margin-left: auto;
    font-size: 24px;
    color: var(--tg-accent);
}

.kb-link-card {
    display: block;
    padding: 14px;
    margin: 12px 0;
    border: 1px solid var(--tg-border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--tg-accent);
}

.kb-figure {
    margin: 20px 0;
}

.kb-image {
    max-width: 100%;
    border-radius: 8px;
    height: auto;
}

.kb-figure__caption {
    font-size: var(--text-sm);
    color: var(--tg-text-muted);
    margin-top: 8px;
}

.kb-code {
    background: var(--tg-bg-card);
    border: 1px solid var(--tg-border);
    border-radius: 8px;
    padding: 14px;
    overflow-x: auto;
    font-size: var(--text-sm);
    margin: 16px 0;
}

.kb-delimiter {
    border: none;
    border-top: 1px solid var(--tg-border);
    margin: 28px 0;
}

@media (max-width: 1279px) {
    .kb-layout {
        grid-template-columns: 260px 1fr;
    }
    .kb-toc {
        display: none !important;
    }
}

@media (max-width: 767px) {
    .kb-page.kb-page--nav-open {
        overflow: hidden;
    }

    .kb-header {
        flex-wrap: wrap;
        align-items: center;
        gap: 10px;
        padding: 10px 14px;
    }

    .kb-header__brand {
        flex: 1;
        min-width: 0;
    }

    .kb-header__brand span {
        font-size: var(--text-base);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .kb-header__logo {
        height: 32px;
    }

    .kb-header__nav {
        display: none !important;
    }

    .kb-header__search-wrap {
        display: none;
        order: 10;
        flex: 1 1 100%;
        width: 100%;
        min-width: 0;
        max-width: none;
        margin: 0;
        padding-top: 2px;
    }

    .kb-header--search-open .kb-header__search-wrap {
        display: block;
    }

    .kb-search-toggle {
        display: inline-flex;
    }

    .kb-header__actions {
        display: flex;
        align-items: center;
        gap: 8px;
        margin-left: auto;
        flex-shrink: 0;
    }

    .kb-header__login--desktop {
        display: none !important;
    }

    .kb-header__search {
        width: 100%;
        box-sizing: border-box;
    }

    .kb-search-results {
        left: 0;
        right: 0;
    }

    .kb-layout {
        grid-template-columns: 1fr;
    }

    .kb-overlay {
        display: block;
    }

    .kb-layout--nav-open .kb-overlay {
        opacity: 1;
        pointer-events: auto;
    }

    .kb-nav {
        position: fixed;
        left: 0;
        top: 0;
        width: min(320px, 88vw);
        max-width: 88vw;
        height: 100vh;
        height: 100dvh;
        z-index: 160;
        background: var(--tg-bg-content);
        border-right: 1px solid var(--tg-border-light);
        transform: translateX(-100%);
        transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 8px 0 32px var(--tg-shadow);
        padding: 0;
        display: flex;
        flex-direction: column;
        overflow: hidden;
    }

    .kb-layout--nav-open .kb-nav {
        transform: translateX(0);
    }

    .kb-nav__drawer-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        padding: 16px 16px 12px;
        border-bottom: 1px solid var(--tg-border-light);
        flex-shrink: 0;
    }

    .kb-nav__drawer-title {
        margin: 0;
        font-size: var(--text-lg);
        font-weight: 700;
        padding-left: 12px;
        border-left: 3px solid var(--tg-accent);
        line-height: 1.3;
    }

    .kb-nav__close {
        width: 40px;
        height: 40px;
        border: none;
        border-radius: 10px;
        background: var(--tg-bg-input);
        color: var(--tg-text-secondary);
        font-size: 24px;
        line-height: 1;
        cursor: pointer;
    }

    .kb-nav__drawer-links {
        display: flex;
        flex-direction: column;
        gap: 4px;
        padding: 12px 12px 8px;
        border-bottom: 1px solid var(--tg-border-light);
        flex-shrink: 0;
    }

    .kb-nav__drawer-link {
        display: block;
        padding: 10px 12px;
        border-radius: 10px;
        text-decoration: none;
        color: var(--tg-text-secondary);
        font-size: var(--text-base);
        font-weight: 500;
    }

    .kb-nav__drawer-link--active,
    .kb-nav__drawer-link:hover {
        color: var(--tg-accent);
        background: var(--tg-accent-bg);
    }

    [data-theme="dark"] .kb-nav__drawer-link--active {
        background: rgba(88, 166, 255, 0.14);
    }

    .kb-nav__tree {
        flex: 1;
        overflow-y: auto;
        padding: 12px 10px 24px;
        -webkit-overflow-scrolling: touch;
    }

    .kb-nav__section-head {
        font-size: var(--text-base);
        padding: 12px 12px;
        border-radius: 10px;
    }

    .kb-nav__link {
        padding: 10px 12px;
        font-size: var(--text-base);
        border-radius: 10px;
    }

    .kb-main {
        padding: 16px 16px 100px;
        min-width: 0;
    }

    .kb-article-title {
        font-size: var(--text-2xl);
        line-height: 1.25;
        margin-bottom: 16px;
    }

    .kb-breadcrumbs {
        font-size: var(--text-sm);
        line-height: 1.45;
        word-break: break-word;
    }

    .kb-footer {
        padding: 14px 16px 88px;
        font-size: var(--text-sm);
        line-height: 1.5;
    }

    .kb-mobile-menu-fab {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        position: fixed;
        left: 16px;
        bottom: max(16px, env(safe-area-inset-bottom));
        z-index: 140;
        padding: 12px 18px 12px 14px;
        border: none;
        border-radius: 14px;
        background: var(--tg-accent);
        color: #fff;
        font-family: var(--font-primary);
        font-size: var(--text-base);
        font-weight: 600;
        cursor: pointer;
        box-shadow: 0 4px 20px rgba(82, 160, 255, 0.45);
        transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .kb-mobile-menu-fab:active {
        transform: scale(0.97);
    }

    .kb-layout--nav-open .kb-mobile-menu-fab {
        opacity: 0;
        pointer-events: none;
        transform: translateY(8px);
    }

    .kb-mobile-menu-fab__icon {
        display: block;
        width: 18px;
        height: 2px;
        background: currentColor;
        border-radius: 1px;
        box-shadow: 0 6px 0 currentColor, 0 -6px 0 currentColor;
    }

    .kb-search-results {
        max-height: 50vh;
    }

    #kb-article-content .kb-action-card {
        flex-wrap: wrap;
    }

    #kb-article-content .kb-image {
        width: 100%;
    }
}