/* ==========================================================================
   Общие стили и переменные
   ========================================================================== */
:root {
    /* --- Переменные макета --- */
    --sidebar-width: 300px;
    --notes-width: 320px;
    --on-page-nav-width: 220px;
    --content-max-width: 900px; /* Максимальная ширина для читаемости контента */
    --content-h-padding: 40px;  /* Горизонтальные отступы контента */

    /* --- Точки перелома (Breakpoints) --- */
    --bp-xl: 1600px; /* Ширина, при которой комфортно помещаются все панели */
    --bp-l: 1200px;  /* Экраны ноутбуков, где правая навигация скрывается */
    --bp-m: 992px;   /* Планшеты, переход на мобильную версию */
    --bp-s: 768px;   /* Маленькие планшеты и большие телефоны */
    --bp-xs: 480px;  /* Маленькие телефоны */

    /* --- Светлая тема --- */
    --main-bg-color: #f6f8fa;
    --content-bg-color: #ffffff;
    --text-color: #24222e;
    --secondary-text-color: #586069;
    --link-color: #0366d6;
    --border-color: #e1e4e8;
    --code-bg-color: #f3f3f3;
    --warning-bg-color: #fffbdd;
    --warning-border-color: #ffc300;
    --active-nav-bg: #e8f0fe;
    --active-nav-text: #1a73e8;
    --shadow-color: rgba(0,0,0,0.05);
    --icon-filter: grayscale(0);
    --highlight-bg-color: #fff2a8;
    --highlight-text-color: #24292e;
    --current-match-shadow: #0366d6;
    --cross-lang-match-bg: #e8f0fe;
    --note-highlight-bg: #fffbdd;
}

html[data-theme="dark"] {
    /* --- Темная тема --- */
    --main-bg-color: #0d1117;
    --content-bg-color: #161b22;
    --text-color: #c9d1d9;
    --secondary-text-color: #8b949e;
    --link-color: #58a6ff;
    --border-color: #30363d;
    --code-bg-color: #2d333b;
    --warning-bg-color: #2c240f;
    --warning-border-color: #a78700;
    --active-nav-bg: #1f6feb26;
    --active-nav-text: #58a6ff;
    --shadow-color: rgba(0,0,0,0.2);
    --icon-filter: grayscale(1) brightness(1.5);
    --highlight-bg-color: #6b5800;
    --highlight-text-color: #f0f6fc;
    --current-match-shadow: #58a6ff;
    --cross-lang-match-bg: #1f6feb26;
    --note-highlight-bg: #3a321d;
}

html { scroll-behavior: smooth; }
html, body {
    overflow-x: hidden;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    line-height: 1.6;
    background-color: var(--main-bg-color);
    color: var(--text-color);
    display: flex;
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
}

/* ==========================================================================
   Основная структура макета
   ========================================================================== */

/* НОВЫЙ БЛОК: Стили для области логотипа */
.sidebar-logo-area {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.sidebar-logo-area img {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    object-fit: cover;
}
.logo-text {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-color);
    white-space: normal; /* Разрешает перенос текста */
    word-break: break-word; /* Помогает переносить длинные слова, если они не помещаются */
    line-height: 1.3; /* Немного уменьшаем межстрочный интервал для компактности */
}
/* КОНЕЦ НОВОГО БЛОКА */


.sidebar {
    width: var(--sidebar-width);
    position: fixed; top: 0; left: 0; height: 100vh;
    background-color: var(--content-bg-color);
    border-right: 1px solid var(--border-color);
    box-shadow: 1px 0 3px var(--shadow-color);
    display: flex; flex-direction: column;
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.3s ease-in-out;
    z-index: 1000;
}

.main-content {
    margin-left: var(--sidebar-width);
    flex-grow: 1;
    padding: clamp(20px, 4vw, 40px) var(--content-h-padding);
    box-sizing: border-box;
    min-width: 0;
    transition: margin-right 0.3s ease-in-out;
}

.content-wrapper {
    background-color: var(--content-bg-color);
    padding: 30px var(--content-h-padding);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px var(--shadow-color), 0 1px 2px var(--shadow-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
    max-width: var(--content-max-width);
    width: 100%;
    box-sizing: border-box;
    margin: 0;
    overflow-wrap: break-word;
}

.on-page-nav {
    display: none;
    position: fixed;
    top: 100px;
    left: calc(var(--sidebar-width) + var(--content-h-padding) + var(--content-max-width) + 40px);
    width: var(--on-page-nav-width);
    height: calc(100vh - 120px);
    overflow-y: auto;
    padding-left: 20px;
    transition: transform 0.3s ease-in-out;
}

.notes-panel {
    position: fixed; top: 0; right: 0;
    width: var(--notes-width); height: 100vh;
    background-color: var(--content-bg-color);
    border-left: 1px solid var(--border-color);
    box-shadow: -2px 0 8px var(--shadow-color);
    z-index: 999;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    display: flex; flex-direction: column;
}
.notes-panel.is-open {
    transform: translateX(0);
}

/* ==========================================================================
   Стили компонентов
   ========================================================================== */

.sidebar-header { padding: 15px 20px; border-bottom: 1px solid var(--border-color); flex-shrink: 0; }
.sidebar-header h3 { margin: 15px 0 0 0; font-size: 1.1em; }
.sidebar-controls { display: flex; justify-content: flex-start; align-items: center; gap: 10px; }
.control-btn { background: none; border: 1px solid var(--border-color); color: var(--secondary-text-color); cursor: pointer; border-radius: 50%; width: 40px; height: 40px; transition: background-color 0.2s, color 0.2s, border-color 0.2s; flex-shrink: 0; display: flex; align-items: center; justify-content: center; padding: 0; }
.control-btn:hover { background-color: var(--main-bg-color); }
.control-btn.active { background-color: var(--active-nav-bg); color: var(--active-nav-text); border-color: var(--link-color); }
.control-btn svg, .theme-icon { width: 22px; height: 22px; filter: var(--icon-filter); transition: filter 0.3s ease; }
.lang-switcher-dropdown { position: relative; display: flex; }
.lang-btn { width: 40px; height: 40px; }
.dropdown-content { display: none; position: absolute; top: 50px; left: 0; background-color: var(--content-bg-color); min-width: 180px; box-shadow: 0px 8px 16px 0px var(--shadow-color); z-index: 1001; border-radius: 6px; border: 1px solid var(--border-color); overflow: hidden; padding: 5px; box-sizing: border-box; }
.dropdown-content.adaptive { width: 360px; max-height: 400px; display: flex; flex-direction: column; flex-wrap: wrap; }
.dropdown-content.adaptive button { width: 170px; }
.dropdown-content button { color: var(--text-color); padding: 8px 12px; text-decoration: none; display: flex; align-items: center; gap: 10px; width: 100%; border: none; background: none; text-align: left; cursor: pointer; font-size: 15px; border-radius: 4px; }
.dropdown-content button:hover { background-color: var(--main-bg-color); }
.dropdown-content.show { display: flex; }
.flag-img { width: 22px; height: 22px; border-radius: 50%; object-fit: cover; }
#current-lang-flag .flag-img { width: 26px; height: 26px; }
.sidebar-content { flex-grow: 1; overflow-y: auto; padding: 15px 20px; }
.toc-search-container { position: relative; margin-bottom: 15px; }
.toc-search-icon { position: absolute; top: 0; left: 12px; height: 36px; display: flex; align-items: center; width: 16px; color: var(--secondary-text-color); pointer-events: none; z-index: 2; }
#toc-search { width: 100%; height: 36px; padding: 8px 12px 8px 36px; border-radius: 6px; border: 1px solid var(--border-color); background-color: var(--main-bg-color); color: var(--text-color); box-sizing: border-box; font-size: 14px; transition: border-color 0.2s, box-shadow 0.2s; }
#toc-search:focus { outline: none; border-color: var(--link-color); box-shadow: 0 0 0 2px rgba(3, 102, 214, 0.3); }
#search-nav-controls { position: absolute; top: 4px; right: 5px; display: flex; align-items: center; gap: 4px; background-color: var(--main-bg-color); padding: 2px 4px; border-radius: 6px; }
#search-results-count { font-size: 12px; color: var(--secondary-text-color); padding: 0 4px; }
#search-nav-controls button { background: none; border: 1px solid var(--border-color); color: var(--secondary-text-color); border-radius: 4px; width: 22px; height: 22px; cursor: pointer; transition: background-color 0.2s, color 0.2s; display: flex; align-items: center; justify-content: center; padding: 0; }
#search-nav-controls button:hover { background-color: var(--border-color); color: var(--text-color); }

/* ==========================================================================
   ИЗМЕНЕННЫЕ СТИЛИ НАВИГАЦИИ (ДРЕВОВИДНАЯ СТРУКТУРА)
   ========================================================================== */
.sidebar nav, .sidebar nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.sidebar nav li {
    position: relative;
}
.toc-submenu {
    position: relative;
    padding-left: 0; /* Убираем отступ у списка */
}
/* Вертикальная линия для подменю */
.toc-submenu::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 14px; /* Позиционируем линию по центру отступа (28px / 2) */
    width: 1px;
    background-color: var(--border-color);
    transition: background-color 0.3s ease;
}
/* Горизонтальная линия для элементов H2 */
.toc-h2::before {
    content: '';
    position: absolute;
    top: 18px; /* Вертикальное выравнивание по центру ссылки */
    left: 14px; /* Начинается от вертикальной линии */
    width: 14px; /* Длина до текста */
    height: 1px;
    background-color: var(--border-color);
    transition: background-color 0.3s ease;
}
/* Добавляем отступ слева для элементов H2, чтобы текст был выровнен с H1 */
.toc-h2 {
    padding-left: 28px; /* Этот отступ создает место для линий и выравнивает текст */
}
/* --- Общие стили для ссылок, которые были и раньше --- */
.sidebar nav a {
    text-decoration: none;
    color: var(--text-color);
    border-radius: 5px;
    transition: background-color 0.2s ease, color 0.2s ease;
    display: block;
    padding: 6px 10px;
}
.sidebar nav a:hover {
    background-color: var(--main-bg-color);
}
.sidebar nav a.active {
    background-color: var(--active-nav-bg);
    color: var(--active-nav-text);
    font-weight: 600;
}
.toc-h1-header {
    display: flex;
    align-items: center;
    min-height: 35px;
}
.toc-h1 a {
    font-weight: normal;
    font-size: 16px;
    flex-grow: 1;
}
.toc-h2 a {
    font-size: 14px;
    color: var(--secondary-text-color);
}
.toc-submenu {
    overflow: hidden;
    max-height: 1000px;
    transition: max-height 0.15s ease-out, opacity 0.15s ease-out, visibility 0.15s;
    opacity: 1;
    visibility: visible;
}
.toc-h1.is-collapsed .toc-submenu {
    max-height: 0;
    opacity: 0;
    visibility: hidden;
}
.toc-toggle {
    flex-shrink: 0;
    width: 28px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-text-color);
    user-select: none;
    transition: color 0.15s ease;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}
.toc-toggle:hover {
    color: var(--text-color);
}
.toc-toggle::before {
    content: '▶';
    font-size: 12px;
    display: inline-block;
    transition: transform 0.15s ease;
}
.toc-h1:not(.is-collapsed) .toc-toggle::before {
    transform: rotate(90deg);
}
.toc-toggle.is-placeholder {
    cursor: default;
    opacity: 0;
}
/* ==========================================================================
   КОНЕЦ ИЗМЕНЕНИЙ СТИЛЕЙ НАВИГАЦИИ
   ========================================================================== */

h1, h2, h3, p, ul, ol, blockquote, .doc-image, pre { position: relative; }
h1, h2, h3 { border-bottom: 1px solid var(--border-color); padding-bottom: 0.5em; margin-top: 2em; margin-bottom: 1em; scroll-margin-top: 20px; transition: border-color 0.3s ease; }
.emoji { height: 1.2em; width: 1.2em; margin-right: 0.3em; vertical-align: -0.2em; filter: var(--icon-filter); transition: filter 0.3s ease; }
h1:first-child { margin-top: 0; }
h1 { font-size: 2em; } h2 { font-size: 1.6em; } h3 { font-size: 1.3em; border-bottom-style: dashed; }
a { color: var(--link-color); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace; background-color: var(--code-bg-color); padding: 0.2em 0.4em; margin: 0; font-size: 85%; border-radius: 3px; border: 1px solid var(--border-color); transition: background-color 0.3s ease, border-color 0.3s ease; }
pre { background-color: var(--code-bg-color); padding: 16px; overflow: auto; border-radius: 6px; border: 1px solid var(--border-color); transition: background-color 0.3s ease, border-color 0.3s ease; white-space: pre-wrap; word-break: break-all; }
pre code { padding: 0; margin: 0; font-size: 100%; background-color: transparent; border: none; word-wrap: normal; }
.copy-code-btn { position: absolute; top: 8px; right: 8px; background-color: var(--main-bg-color); border: 1px solid var(--border-color); color: var(--secondary-text-color); padding: 4px 8px; border-radius: 5px; cursor: pointer; font-size: 12px; opacity: 0; transition: opacity 0.2s, background-color 0.2s, color 0.2s, border-color 0.2s; z-index: 1; }
pre:hover .copy-code-btn { opacity: 1; }
.copy-code-btn:hover { background-color: var(--border-color); }
.copy-code-btn.copied { background-color: #28a745; color: white; border-color: #28a745; opacity: 1; }
.warning-box { background-color: var(--warning-bg-color); border-left: 5px solid var(--warning-border-color); padding: 15px; margin: 20px 0; border-radius: 0 5px 5px 0; transition: background-color 0.3s ease, border-color 0.3s ease; }
.doc-image { width: 100%; height: auto; border: 1px solid var(--border-color); border-radius: 8px; margin: 25px 0; box-shadow: 0 1px 3px var(--shadow-color); display: block; cursor: zoom-in; }
#scrollTopBtn { position: fixed; bottom: 20px; right: 30px; z-index: 99; border: none; outline: none; background-color: var(--link-color); color: white; cursor: pointer; padding: 0; border-radius: 50%; width: 50px; height: 50px; font-size: 24px; box-shadow: 0 4px 8px rgba(0,0,0,0.2); transition: opacity 0.3s, visibility 0.3s, background-color 0.2s; display: none; align-items: center; justify-content: center; }
#scrollTopBtn:hover { background-color: #0056b3; }
.mobile-nav-toggle { display: none; transition: transform 0.3s ease-in-out, background-color 0.2s, border-color 0.2s, color 0.2s; }
.mobile-nav-toggle .icon-open, .mobile-nav-toggle .icon-close { display: none; }
.faq-section { margin-top: 2em; }
.faq-section details { background-color: var(--main-bg-color); border: 1px solid var(--border-color); border-radius: 6px; margin-bottom: 10px; transition: background-color 0.3s ease; }
.faq-section details:not([open]) { background-color: transparent; border-color: transparent; }
.faq-section summary { font-weight: 600; padding: 15px 20px 15px 45px; cursor: pointer; list-style: none; display: block; position: relative; transition: background-color 0.2s ease; }
.faq-section summary::-webkit-details-marker, .faq-section summary::marker { display: none; }
.faq-section details:not([open]):hover summary { background-color: var(--main-bg-color); }
.faq-section summary:before { content: '+'; font-size: 1.5em; line-height: 1; color: var(--link-color); font-weight: 400; transition: transform 0.2s ease-in-out; width: 17px; text-align: center; position: absolute; left: 20px; top: 50%; transform: translateY(-50%) rotate(0deg); }
.faq-section details[open] summary:before { transform: translateY(-50%) rotate(45deg); }
.faq-section details p { padding: 0 20px 15px; margin: 0; margin-left: 45px; opacity: 0.9; }
.faq-section details p code { font-size: 90%; }
.lightbox-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.85); z-index: 2000; display: flex; align-items: center; justify-content: center; backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px); opacity: 0; visibility: hidden; transition: opacity 0.3s ease-in-out, visibility 0s linear 0.3s; }
.lightbox-overlay.show { opacity: 1; visibility: visible; transition-delay: 0s; }
.lightbox-content { position: relative; width: 95%; height: 95%; display: flex; align-items: center; justify-content: center; overflow: hidden; }
#lightbox-image { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); cursor: grab; transition: transform 0.3s ease; border: 2px solid rgba(255, 255, 255, 0.1); }
#lightbox-image.is-zoomed { cursor: move; transform-origin: 0 0; }
.lightbox-close { position: absolute; top: 15px; right: 25px; font-size: 45px; font-weight: bold; color: #fff; cursor: pointer; line-height: 1; transition: color 0.2s, transform 0.2s; z-index: 2001; text-shadow: 0 0 10px rgba(0,0,0,0.7); background: none; border: none; padding: 0; }
.lightbox-close:hover { color: #ccc; transform: scale(1.1); }
body.lightbox-active { overflow: hidden; }
.on-page-nav h4 { font-size: 14px; font-weight: 600; color: var(--secondary-text-color); margin: 0 0 10px 0; text-transform: uppercase; }
.on-page-nav nav ul { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--border-color); }
.on-page-nav nav a { display: block; padding: 5px 15px; font-size: 13px; color: var(--secondary-text-color); text-decoration: none; border-left: 2px solid transparent; margin-left: -2px; transition: all 0.2s ease; }
.on-page-nav nav a:hover { color: var(--text-color); }
.on-page-nav nav a.active { color: var(--link-color); font-weight: 600; border-left-color: var(--link-color); background-color: var(--active-nav-bg); }
.on-page-nav .toc-level-3 { padding-left: 30px; }
#mindmap-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); z-index: 2000; display: flex; align-items: center; justify-content: center; backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(5px); opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0s linear 0.3s; }
#mindmap-overlay.show { opacity: 1; visibility: visible; transition-delay: 0s; }
body.mindmap-active { overflow: hidden; }
.mindmap-controls { position: absolute; top: 15px; left: 20px; z-index: 2002; display: flex; gap: 10px; align-items: center; }
#mindmap-preset-selector { background-color: rgba(22, 27, 34, 0.8); color: #c9d1d9; border: 1px solid #30363d; border-radius: 6px; padding: 8px 12px; font-size: 14px; cursor: pointer; backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); transition: border-color 0.2s; }
#mindmap-preset-selector:focus { outline: none; border-color: var(--link-color); }
#mindmap-reset { position: static; color: #fff; cursor: pointer; line-height: 1; transition: color 0.2s, transform 0.2s; text-shadow: 0 0 10px rgba(0,0,0,0.7); background: none; border: none; padding: 0; display: flex; align-items: center; justify-content: center; }
#mindmap-reset:hover { color: #ccc; transform: scale(1.1); }
#mindmap-close { position: absolute; top: 15px; right: 25px; font-size: 45px; font-weight: bold; color: #fff; cursor: pointer; line-height: 1; transition: color 0.2s, transform 0.2s; z-index: 2001; text-shadow: 0 0 10px rgba(0,0,0,0.7); background: none; border: none; padding: 0; display: flex; align-items: center; justify-content: center; }
#mindmap-close:hover { color: #ccc; transform: scale(1.1); }
#mindmap-container { width: 100%; height: 100%; outline: none; }
.vis-network:focus { outline: none; }
.add-note-hover-btn { position: absolute; z-index: 50; background-color: var(--link-color); color: white; border: none; border-radius: 50%; width: 28px; height: 28px; box-shadow: 0 2px 6px rgba(0,0,0,0.2); cursor: pointer; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transform: scale(0.8); transition: opacity 0.25s ease-out, transform 0.25s ease-out, visibility 0s linear 0.25s; }
.add-note-hover-btn.visible { opacity: 1; transform: scale(1); visibility: visible; transition: opacity 0.25s ease-out, transform 0.25s ease-out, visibility 0s linear 0s; }
.add-note-hover-btn:hover { background-color: #0056b3; transform: scale(1.1); }
.notes-panel-header { display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; border-bottom: 1px solid var(--border-color); flex-shrink: 0; }
.notes-panel-header h4 { font-size: 14px; font-weight: 600; color: var(--secondary-text-color); margin: 0; text-transform: uppercase; }
.notes-list { padding: 15px; overflow-y: auto; flex-grow: 1; }
.no-notes-message { font-size: 13px; color: var(--secondary-text-color); text-align: center; padding: 20px; border: 2px dashed var(--border-color); border-radius: 6px; }
.note-card { background-color: var(--main-bg-color); border: 1px solid var(--border-color); border-radius: 6px; padding: 12px; margin-bottom: 15px; overflow-wrap: break-word; }
.note-context { font-size: 12px; color: var(--secondary-text-color); font-style: italic; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 8px; cursor: pointer; padding-bottom: 5px; border-bottom: 1px dashed var(--border-color); }
.note-context:hover { color: var(--link-color); }
.note-preview { font-size: 14px; margin: 0 0 10px 0; -webkit-box-orient: vertical; display: -webkit-box; -webkit-line-clamp: 3; overflow: hidden; text-overflow: ellipsis; white-space: normal; }
.note-card-actions { display: flex; justify-content: flex-end; gap: 8px; }
.note-card-actions button { background-color: transparent; border: 1px solid var(--border-color); color: var(--text-color); padding: 4px 10px; border-radius: 5px; cursor: pointer; font-size: 12px; transition: background-color 0.2s, color 0.2s; }
.note-card-actions button:hover { background-color: var(--main-bg-color); }
.delete-note-btn { display: flex; align-items: center; justify-content: center; padding: 5px; width: 28px; height: 28px; }
.delete-note-btn:hover { background-color: #cb24311a; color: #cb2431; border-color: #cb24314d; }
.has-note { border-bottom: 2px dotted var(--link-color); cursor: pointer; }
.note-highlight { background-color: var(--note-highlight-bg); transition: background-color 0.3s ease-in-out; border-radius: 3px; }
.note-popup { position: absolute; z-index: 1050; width: 300px; background-color: var(--content-bg-color); border: 1px solid var(--border-color); box-shadow: 0 5px 15px var(--shadow-color); border-radius: 8px; opacity: 0; visibility: hidden; transform: scale(0.95); transition: opacity 0.15s ease, transform 0.15s ease, visibility 0s linear 0.15s; }
.note-popup.visible { opacity: 1; visibility: visible; transform: scale(1); transition-delay: 0s; }
.note-popup-content { padding: 12px; }
.note-popup-content textarea { width: 100%; min-height: 100px; border: 1px solid var(--border-color); background-color: var(--content-bg-color); color: var(--text-color); border-radius: 4px; padding: 8px; font-family: inherit; font-size: 14px; resize: vertical; box-sizing: border-box; transition: border-color 0.2s, box-shadow 0.2s; }
.note-popup-content textarea:focus { outline: none; border-color: var(--link-color); box-shadow: 0 0 0 2px rgba(3, 102, 214, 0.3); }
.note-popup-close-btn { position: absolute; top: 4px; right: 4px; width: 28px; height: 28px; border: none; background: transparent; border-radius: 50%; color: var(--secondary-text-color); font-size: 20px; cursor: pointer; display: flex; align-items: center; justify-content: center; line-height: 1; transition: background-color 0.2s, color 0.2s; }
.note-popup-close-btn:hover { background-color: var(--main-bg-color); color: var(--text-color); }
mark { background-color: transparent; color: var(--highlight-text-color); box-shadow: inset 0 0 0 1em var(--highlight-bg-color); padding: 0; margin: 0; border-radius: 3px; transition: box-shadow 0.2s ease-in-out; }
mark.current-match { box-shadow: inset 0 0 0 1em var(--highlight-bg-color), 0 0 0 2px var(--current-match-shadow); }
.cross-language-match { background-color: var(--cross-lang-match-bg); border-radius: 3px; transition: box-shadow 0.2s ease-in-out, background-color 0.2s ease-in-out; }
.cross-language-match.current-match { box-shadow: 0 0 0 2px var(--current-match-shadow); }

/* ==========================================================================
   Адаптивность (MEDIA QUERIES)
   ========================================================================== */

@media (min-width: 1601px) {
    .on-page-nav {
        display: block;
    }
}

@media (max-width: 992px) {
    body {
        display: block;
    }
    body.sidebar-is-open {
        overflow: hidden;
    }
    .sidebar { position: fixed; transform: translateX(-100%); height: 100%; width: 280px; }
    .sidebar.is-open { transform: translateX(0); }
    .main-content {
        margin-left: 0;
        padding: 80px 20px 20px 20px;
        width: 100%;
        box-sizing: border-box;
        max-width: 100vw;
        margin-right: 0 !important;
        transform: none !important;
    }
    .content-wrapper { padding: 15px 20px; margin: 0; }
    .main-content h1,
    .main-content h2,
    .main-content h3,
    .main-content p,
    .main-content ul,
    .main-content ol,
    .main-content blockquote {
        padding-left: 15px;
    }
    .mobile-nav-toggle {
        display: flex; align-items: center; justify-content: center;
        position: fixed; top: 15px; left: 15px; z-index: 1001;
        background: var(--content-bg-color); border: 1px solid var(--border-color);
        border-radius: 50%; width: 50px; height: 50px; font-size: 24px;
        cursor: pointer; box-shadow: 0 2px 5px rgba(0,0,0,0.1); color: var(--text-color);
    }
    body:not(.sidebar-is-open) .mobile-nav-toggle .icon-open { display: block; }
    body.sidebar-is-open .mobile-nav-toggle .icon-close { display: block; }
    body.sidebar-is-open .mobile-nav-toggle { transform: translateX(280px); }
    .notes-panel {
        position: fixed; bottom: 0; top: auto; right: 0; left: 0;
        width: 100%; height: 50vh;
        border-top: 1px solid var(--border-color);
        border-left: none; border-radius: 12px 12px 0 0;
        transform: translateY(100%);
    }
    .notes-panel.is-open { transform: translateY(0); }
    .note-popup {
        position: fixed !important;
        top: 50% !important;
        left: 50% !important;
        right: auto !important;
        transform: translate(-50%, -50%) !important;
        width: 90vw !important;
        max-width: 400px;
        z-index: 1100;
    }
    .dropdown-content, .dropdown-content.adaptive {
        max-width: calc(100vw - 85px); box-sizing: border-box;
    }
    .dropdown-content.adaptive {
        width: auto; min-width: 200px; max-height: 65vh;
        flex-direction: column; flex-wrap: nowrap; overflow-y: auto;
    }
    .dropdown-content.adaptive button { width: 100%; padding: 8px 12px; font-size: 14px; }
    .dropdown-content.adaptive button span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    pre .copy-code-btn { opacity: 1; }
    #scrollTopBtn { bottom: 20px; right: 20px; }
    
    /* Адаптация контролов карты */
    .mindmap-controls {
        left: 10px;
        top: 10px;
    }
    #mindmap-preset-selector {
        padding: 6px 8px;
        font-size: 12px;
    }
    #mindmap-close {
        top: 10px;
        right: 15px;
        font-size: 35px;
    }
    #mindmap-reset {
        /* На мобильных устройствах кнопка сброса теперь часть flex-контейнера и не требует абсолютного позиционирования */
        position: static;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 60px 0 15px 0;
    }
    .content-wrapper {
        padding: 15px;
        border-left: none;
        border-right: none;
        border-radius: 0;
        box-shadow: none;
    }
    h1 { font-size: 1.8em; }
    h2 { font-size: 1.4em; }
    h3 { font-size: 1.2em; }
}