/* ==========================================================================
   CSS Variables — Темы
   ========================================================================== */
:root {
    /* Светлая тема (по умолчанию) */
    --bg: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #eaeef2;
    --bg-hover: #f0f4f8;
    --bg-active: #e1e8f0;
    --text: #1f2328;
    --text-secondary: #59636e;
    --text-muted: #818b98;
    --border: #d0d7de;
    --border-light: #e3e8ed;
    --accent: #0969da;
    --accent-hover: #0550ae;
    --accent-bg: #ddf4ff;
    --code-bg: #f6f8fa;
    --code-text: #1f2328;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --sidebar-width: 280px;
    --header-height: 60px;
    --content-max-width: none;
    --radius: 6px;
    --radius-sm: 4px;
    --transition: 0.2s ease;
}

[data-theme="dark"] {
    /* Тёмная тема */
    --bg: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2129;
    --bg-hover: #1c2129;
    --bg-active: #2d333b;
    --text: #e6edf3;
    --text-secondary: #9198a1;
    --text-muted: #6e7681;
    --border: #30363d;
    --border-light: #21262d;
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --accent-bg: #122d42;
    --code-bg: #161b22;
    --code-text: #e6edf3;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* ==========================================================================
   Сброс и базовые стили
   ========================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
        "Roboto", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input {
    font-family: inherit;
}

/* ==========================================================================
   Layout — Общий каркас
   ========================================================================== */
.app {
    display: flex;
    min-height: 100vh;
}

/* ==========================================================================
   Sidebar — Боковое меню
   ========================================================================== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    height: var(--header-height);
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text) !important;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none !important;
}

.logo:hover {
    color: var(--accent) !important;
}

.logo svg {
    color: var(--accent);
    flex-shrink: 0;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: background var(--transition), color var(--transition);
}

.theme-toggle:hover {
    background: var(--bg-hover);
    color: var(--text);
}

.theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: block;
}

/* Поиск */
.search-box {
    position: relative;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
}

.search-box svg {
    position: absolute;
    left: 28px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 14px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

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

/* Навигация */
.nav {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.nav::-webkit-scrollbar {
    width: 6px;
}

.nav::-webkit-scrollbar-track {
    background: transparent;
}

.nav::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.nav::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.nav-loading,
.nav-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 32px 16px;
    color: var(--text-muted);
    font-size: 14px;
    text-align: center;
}

.nav-group {
    margin-bottom: 4px;
}

.nav-group-title {
    padding: 8px 16px 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.nav-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 16px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
    border-left: 3px solid transparent;
    user-select: none;
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text);
    text-decoration: none;
}

.nav-item.active {
    background: var(--bg-active);
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: 500;
}

.nav-item-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-item-langs {
    display: flex;
    gap: 2px;
    flex-shrink: 0;
}

.nav-lang {
    padding: 2px 6px;
    font-size: 10px;
    font-weight: 600;
    border-radius: 3px;
    background: var(--bg-tertiary);
    color: var(--text-muted);
    border: 1px solid transparent;
    transition: all var(--transition);
}

.nav-lang:hover {
    background: var(--accent-bg);
    color: var(--accent);
}

.nav-lang.active {
    background: var(--accent);
    color: #fff;
}

.nav-item.hidden {
    display: none;
}

/* Sidebar footer */
.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-light);
    flex-shrink: 0;
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary) !important;
    font-size: 13px;
    text-decoration: none !important;
}

.github-link:hover {
    color: var(--accent) !important;
}

/* ==========================================================================
   Кнопка меню (мобильные)
   ========================================================================== */
.menu-toggle {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 101;
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text);
    box-shadow: var(--shadow);
}

.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.overlay.active {
    display: block;
    opacity: 1;
}

/* ==========================================================================
   Content — Область контента
   ========================================================================== */
.content {
    flex: 1;
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    min-height: 100vh;
    background: var(--bg);
}

.content-inner {
    padding: 48px 48px 96px;
}

.content-loading,
.content-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    gap: 16px;
    color: var(--text-muted);
    text-align: center;
}

.content-error {
    color: #d73a49;
}

/* Заголовок документа */
.doc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
    flex-wrap: wrap;
}

.doc-langs {
    display: flex;
    align-items: center;
    gap: 6px;
}

.doc-langs-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-right: 4px;
}

.doc-lang-btn {
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.doc-lang-btn:hover {
    background: var(--accent-bg);
    color: var(--accent);
    border-color: var(--accent);
}

.doc-lang-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* ==========================================================================
   Markdown стили
   ========================================================================== */
.markdown-body {
    color: var(--text);
    font-size: 16px;
    line-height: 1.7;
    word-wrap: break-word;
}

.markdown-body > *:first-child {
    margin-top: 0 !important;
}

.markdown-body > *:last-child {
    margin-bottom: 0 !important;
}

/* Заголовки */
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    margin-top: 32px;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text);
}

.markdown-body h1 {
    font-size: 2em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid var(--border-light);
}

.markdown-body h2 {
    font-size: 1.5em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid var(--border-light);
}

.markdown-body h3 {
    font-size: 1.25em;
}

.markdown-body h4 {
    font-size: 1em;
}

.markdown-body h5 {
    font-size: 0.875em;
    color: var(--text-secondary);
}

.markdown-body h6 {
    font-size: 0.85em;
    color: var(--text-muted);
}

/* Anchor links для заголовков */
.markdown-body h1:hover .anchor,
.markdown-body h2:hover .anchor,
.markdown-body h3:hover .anchor,
.markdown-body h4:hover .anchor,
.markdown-body h5:hover .anchor,
.markdown-body h6:hover .anchor {
    opacity: 1;
}

.anchor {
    float: left;
    padding-right: 4px;
    margin-left: -20px;
    line-height: 1;
    color: var(--text-muted);
    opacity: 0;
    transition: opacity var(--transition);
}

.anchor:hover {
    color: var(--accent);
    text-decoration: none;
}

.anchor svg {
    vertical-align: middle;
}

/* Параграфы */
.markdown-body p {
    margin-top: 0;
    margin-bottom: 16px;
}

/* Ссылки */
.markdown-body a {
    color: var(--accent);
    text-decoration: none;
}

.markdown-body a:hover {
    text-decoration: underline;
}

.markdown-body a:not([href]) {
    color: inherit;
    text-decoration: none;
}

/* Списки */
.markdown-body ul,
.markdown-body ol {
    margin-top: 0;
    margin-bottom: 16px;
    padding-left: 2em;
}

.markdown-body ul ul,
.markdown-body ul ol,
.markdown-body ol ol,
.markdown-body ol ul {
    margin-top: 0;
    margin-bottom: 0;
}

.markdown-body li {
    word-wrap: break-all;
    margin-top: 4px;
}

.markdown-body li > p {
    margin-top: 8px;
}

.markdown-body li + li {
    margin-top: 4px;
}

/* Код */
.markdown-body code,
.markdown-body tt {
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    background-color: var(--code-bg);
    border-radius: var(--radius-sm);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    color: var(--code-text);
}

.markdown-body pre {
    margin-top: 0;
    margin-bottom: 16px;
    background: var(--code-bg);
    border-radius: var(--radius);
    overflow: auto;
}

.markdown-body pre code,
.markdown-body pre tt {
    padding: 16px;
    overflow: auto;
    display: block;
    font-size: 13px;
    line-height: 1.5;
    background: transparent;
    color: inherit;
}

/* Цитаты */
.markdown-body blockquote {
    margin: 0 0 16px 0;
    padding: 0 1em;
    color: var(--text-secondary);
    border-left: 0.25em solid var(--border);
}

.markdown-body blockquote > :first-child {
    margin-top: 0;
}

.markdown-body blockquote > :last-child {
    margin-bottom: 0;
}

/* Таблицы */
.markdown-body table {
    display: block;
    width: 100%;
    width: max-content;
    max-width: 100%;
    overflow: auto;
    margin-top: 0;
    margin-bottom: 16px;
    border-collapse: collapse;
}

.markdown-body table th,
.markdown-body table td {
    padding: 6px 13px;
    border: 1px solid var(--border);
}

.markdown-body table th {
    font-weight: 600;
    background: var(--bg-secondary);
}

.markdown-body table tr {
    background: var(--bg);
    border-top: 1px solid var(--border);
}

.markdown-body table tr:nth-child(2n) {
    background: var(--bg-secondary);
}

/* Изображения */
.markdown-body img {
    max-width: 100%;
    box-sizing: content-box;
    background: var(--bg);
    border-radius: var(--radius);
}

.markdown-body hr {
    height: 0.25em;
    padding: 0;
    margin: 24px 0;
    background: var(--border-light);
    border: 0;
}

/* Чек-боксы (задачи) */
.markdown-body input[type="checkbox"] {
    margin: 0 0.2em 0.25em -1.6em;
    vertical-align: middle;
}

.markdown-body .task-list-item {
    list-style-type: none;
}

.markdown-body .task-list-item li {
    list-style-type: none;
}

/* Контейнеры-уведомления (::: tip ::: warning ::: danger) */
.markdown-body .callout {
    margin: 16px 0;
    padding: 16px;
    border-left: 4px solid var(--accent);
    background: var(--accent-bg);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.markdown-body .callout-title {
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.markdown-body .callout-warning {
    border-left-color: #d29922;
    background: rgba(210, 153, 34, 0.1);
}

.markdown-body .callout-warning .callout-title {
    color: #b08800;
}

[data-theme="dark"] .markdown-body .callout-warning .callout-title {
    color: #e3b341;
}

.markdown-body .callout-danger {
    border-left-color: #f85149;
    background: rgba(248, 81, 73, 0.1);
}

.markdown-body .callout-danger .callout-title {
    color: #cf222e;
}

[data-theme="dark"] .markdown-body .callout-danger .callout-title {
    color: #ff7b72;
}

/* ==========================================================================
   Spinner
   ========================================================================== */
.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ==========================================================================
   Адаптивность
   ========================================================================== */
@media (max-width: 1024px) {
    .content-inner {
        padding: 32px 24px 64px;
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 260px;
    }

    .sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .menu-toggle {
        display: flex;
    }

    .content {
        margin-left: 0;
        width: 100%;
    }

    .content-inner {
        padding: 64px 16px 48px;
    }

    .markdown-body h1 {
        font-size: 1.5em;
    }

    .markdown-body h2 {
        font-size: 1.25em;
    }

    .markdown-body pre code {
        font-size: 12px;
        padding: 12px;
    }
}

@media (max-width: 480px) {
    .content-inner {
        padding: 64px 12px 32px;
    }

    .doc-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Печать */
@media print {
    .sidebar,
    .menu-toggle,
    .overlay,
    .doc-langs {
        display: none !important;
    }

    .content {
        margin-left: 0;
        width: 100%;
    }

    .content-inner {
        max-width: 100%;
        padding: 0;
    }
}