:root {
    --dark-bg: #121212;
    --darker-bg: #0a0a0a;
    --accent-color: #6c5ce7;
    --accent-color_2: #d7d7d7;
    --accent-hover: #5649c0;
    --text-light: #f5f5f5;
    --text-gray: #b0b0b0;
    --content-bg: #1e1e1e;
    --content-text: #e0e0e0;
    --card-bg: #252525;
    --border-color: #333333;
    --lightH2: #a78bfa;
    --neon-blue: #4fc3f7;
    --neon-purple: #ba68c8;
    --neon-green: #69f0ae;
    --neon-pink: #ff4081;
    --neon-orange: #ff9100;
    --custom-bg-light: #f3f3f6;
    --custom-bg-dark: #23232b;
    --custom-border-light: #e0e0e0;
    --custom-border-dark: #333;
    --custom-num-light: #6a6e7a;
    --custom-num-dark: #b0b0b0;
    --custom-code-light: #23272f;
    --custom-code-dark: #e2e6ed;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&display=swap');

body {
    font-family: 'Inter', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.7;
}

.container {
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Header */
header {
    background-color: var(--darker-bg);
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: transform 0.4s cubic-bezier(.4,0,.2,1), opacity 0.3s;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-light);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    color: var(--accent-color);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

nav a {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    display: flex;
    align-items: center;
}

nav a i {
    margin-right: 8px;
    width: 20px;
    text-align: center;
}

nav a:hover {
    color: var(--accent-color);
}

.auth-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn {
    padding: 8px 18px;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s;
    font-size: 14px;
}

.btn-outline {
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
}

.btn-outline:hover {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

/* Theme toggle button */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-gray);
    cursor: pointer;
    font-size: 20px;
    transition: all 0.3s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    padding: 0;
}

.theme-toggle i {
    color: var(--text-gray);
    transition: all 0.3s;
}

.theme-toggle:hover {
    background-color: rgba(108, 92, 231, 0.1);
}

.theme-toggle:hover i {
    color: var(--accent-color);
}

/* Main content */
.main {
    padding: 40px 0;
}

.article-container {
    background-color: var(--content-bg);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    border: 1px solid var(--border-color);
    padding: 48px 48px 48px 48px;
}

.article-header {
    padding: 40px;
    background: linear-gradient(135deg, var(--accent-color), #4300c1);
    color: white;
}

.article-title {
    font-size: 36px;
    margin-bottom: 15px;
    line-height: 1.3;
}

.article-meta {
    display: flex;
    gap: 20px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.article-content {
    padding: 40px;
    color: var(--content-text);
}

.article-content h2 {
    font-size: 28px;
    margin: 30px 0 20px;
    color: var(--lightH2);
}

.article-content h3 {
    font-size: 22px;
    margin: 25px 0 15px;
    color: var(--lightH2);
}

.article-content p {
    margin-bottom: 20px;
    font-size: 17px;
}

.article-content ul, .article-content ol {
    margin-bottom: 20px;
    padding-left: 30px;
}

.article-content li {
    margin-bottom: 10px;
}

/* Подсветка синтаксиса с неоновыми цветами */
.code-block {
    margin: 25px 0;
    border-radius: 8px;
    overflow: hidden;
    font-size: 15px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
}

pre[class*="language-"] {
    padding: 0 !important;
    margin: 0 !important;
    background: #17171f !important;
    border-left: 4px solid var(--accent-color) !important;
    position: relative !important;
    box-sizing: border-box;
}

code[class*="language-"] {
    font-family: 'Fira Code', 'Courier New', monospace !important;
    text-shadow: none !important;
    font-size: 14px !important;
    font-weight: 600 !important;
    line-height: 1.5;
    color: #e2e6ed !important;
}

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
    color: #6a9955;
}

.token.punctuation {
    color: #d4d4d4;
}

.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol,
.token.deleted {
    color: var(--neon-blue);
}

.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
    color: var(--neon-green);
}

.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string {
    color: var(--neon-orange);
}

.token.atrule,
.token.attr-value,
.token.keyword {
    color: var(--neon-purple);
}

.token.function,
.token.class-name {
    color: #dcdcaa;
}

.token.regex,
.token.important,
.token.variable {
    color: var(--neon-pink);
}

/* Светлая тема для кода */
.light-theme pre[class*="language-"] {
    background: #f3f3f6 !important;
    border-left: 4px solid var(--accent-color) !important;
}

.light-theme .token.comment,
.light-theme .token.prolog,
.light-theme .token.doctype,
.light-theme .token.cdata {
    color: #6a737d !important;
}

.light-theme .token.punctuation {
    color: #4b5057 !important;
}

.light-theme .token.property,
.light-theme .token.tag,
.light-theme .token.boolean,
.light-theme .token.number,
.light-theme .token.constant,
.light-theme .token.symbol,
.light-theme .token.deleted {
    color: #3b6ea8 !important;
}

.light-theme .token.selector,
.light-theme .token.attr-name,
.light-theme .token.string,
.light-theme .token.char,
.light-theme .token.builtin,
.light-theme .token.inserted {
    color: #22863a !important;
}

.light-theme .token.operator,
.light-theme .token.entity,
.light-theme .token.url,
.light-theme .language-css .token.string,
.light-theme .style .token.string {
    color: #b08800 !important;
}

.light-theme .token.atrule,
.light-theme .token.attr-value,
.light-theme .token.keyword {
    color: #6f42c1 !important;
}

.light-theme .token.function,
.light-theme .token.class-name {
    color: #005cc5 !important;
}

.light-theme .token.regex,
.light-theme .token.important,
.light-theme .token.variable {
    color: #d73a49 !important;
}

.image-container {
    margin: 30px 0;
    text-align: center;
}

.article-image {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.caption {
    margin-top: 10px;
    color: var(--text-gray);
    font-size: 14px;
}

/* Sidebar */
.sidebar {
    position: sticky;
    top: 40px;
    align-self: flex-start;
    z-index: 10;
}

.sidebar-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 32px 32px 32px 32px;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
}

.sidebar-title {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-title i {
    color: var(--accent-color);
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    background-color: rgba(70, 59, 159, 1);
    color: var(--accent-color_2);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 14px;
    transition: all 0.3s;
}

.tag:hover {
    background-color: var(--accent-color);
    color: white;
}

/* Old related-articles styles removed - replaced with articles-menu */

/* Footer */
footer {
    background-color: var(--darker-bg);
    padding: 50px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--text-light);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    color: var(--text-gray);
    font-size: 20px;
    transition: color 0.3s;
}

.social-links a:hover {
    color: var(--accent-color);
}

.copyright {
    text-align: center;
    color: var(--text-gray);
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

/* Table of contents */
.toc {
    position: sticky;
    top: 100px;
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
}

.toc-title {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 10px;
}

.toc-list {
    list-style: none;
}

.toc-list li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 15px;
}

.toc-list li:before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background-color: var(--accent-color);
    border-radius: 50%;
}

.toc-list a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 15px;
}

.toc-list a:hover {
    color: var(--accent-color);
}

/* Floating action button */
.fab {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background-color: var(--accent-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 16px rgba(108, 92, 231, 0.25), 0 1.5px 6px rgba(0,0,0,0.10);
    cursor: pointer;
    transition: background 0.3s, box-shadow 0.3s, transform 0.2s;
    z-index: 99;
    border: none;
    outline: none;
}

.fab:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 6px 24px rgba(108, 92, 231, 0.35), 0 2px 8px rgba(0,0,0,0.13);
    transform: translateY(-3px) scale(1.07);
}

.fab i {
    font-size: 24px;
    color: inherit;
    transition: color 0.3s;
}

/* Font Awesome icons */
.fas, .far, .fab {
    color: inherit;
}

/* Light theme styles */
.light-theme {
    --dark-bg: #f5f5f5;
    --darker-bg: #e0e0e0;
    --text-light: #222222;
    --text-gray: #555555;
    --content-bg: #ffffff;
    --content-text: #333333;
    --card-bg: #f0f0f0;
    --border-color: #dddddd;
    --lightH2: #6c5ce7;
}

.light-theme .article-container {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.light-theme .theme-toggle i {
    color: var(--text-gray);
}

.light-theme .theme-toggle:hover i {
    color: var(--accent-color);
}

.light-theme .sidebar-title i,
.light-theme .toc-title i {
    color: var(--accent-color);
}

.light-theme code[class*="language-"] {
    color: #23272f !important;
}

/* Responsive */
@media (max-width: 1400px) {
    .container {
        max-width: 1100px;
        padding: 0 20px;
    }
    .grid-container {
        gap: 32px;
    }
    .article-container, .sidebar-card {
        padding: 24px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 100%;
        padding: 0 10px;
    }
    .grid-container {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .sidebar {
        position: static;
        top: auto;
    }
    .article-container, .sidebar-card {
        padding: 16px;
    }
}

.github-code-block, .github-code-block pre, .github-code-block code {
    font-family: 'Ubuntu Mono', 'Liberation Mono', 'DejaVu Sans Mono', 'Fira Code', 'Menlo', 'Monaco', 'Consolas', 'Courier New', monospace !important;
}

body:not(.light-theme) .github-code-block {
    background: #161b22 !important;
    border: 1px solid #30363d !important;
}

.github-code-block pre {
    margin: 0;
    padding: 20px 24px 20px 16px;
    background: transparent;
    border: none;
    overflow-x: auto;
}

.github-code-block .copy-btn {
    position: absolute;
    top: 12px;
    right: 16px;
    background: rgba(255,255,255,0.7);
    border: 1px solid #d0d7de;
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 13px;
    color: #57606a;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: background 0.2s, border 0.2s, opacity 0.2s;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 6px;
}

body:not(.light-theme) .github-code-block .copy-btn {
    background: rgba(22,27,34,0.7);
    border: 1px solid #30363d;
    color: #c9d1d9;
}

.github-code-block:hover .copy-btn,
.github-code-block .copy-btn:focus {
    opacity: 1;
    pointer-events: auto;
}

.github-code-block .copy-btn:hover {
    background: #f3f4f6;
    border-color: #b6bac2;
}

body:not(.light-theme) .github-code-block .copy-btn:hover {
    background: #21262d;
    border-color: #30363d;
}

.github-code-block .copy-btn svg {
    width: 16px;
    height: 16px;
    display: inline-block;
    vertical-align: middle;
}

.header-hidden {
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
}

.theme-toggle-floating {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: var(--accent-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 5px 20px rgba(108, 92, 231, 0.4);
    cursor: pointer;
    transition: all 0.3s;
    z-index: 99;
    border: none;
}

.theme-toggle-floating:hover {
    background-color: var(--accent-hover);
    transform: translateY(-3px);
}

.theme-toggle-floating-outside {
    position: fixed !important;
    top: 18px;
    right: 32px;
    left: auto !important;
    z-index: 200;
    background: var(--darker-bg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
    border-radius: 50%;
    opacity: 1 !important;
    pointer-events: auto !important;
    transition: top 0.4s cubic-bezier(.4,0,.2,1), right 0.4s cubic-bezier(.4,0,.2,1), opacity 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

header.header-minimal {
    height: 40px !important;
    min-height: 40px !important;
    max-height: 40px !important;
    padding: 0 !important;
    border: none !important;
    box-shadow: none !important;
    background: var(--darker-bg);
    transition: height 0.4s cubic-bezier(.4,0,.2,1), min-height 0.4s, max-height 0.4s, padding 0.3s;
    overflow: visible !important;
}
header.header-minimal .logo,
header.header-minimal .auth-buttons {
    display: none !important;
}
header.header-minimal nav ul {
    gap: 10px;
}
header.header-minimal nav a {
    font-size: 15px;
    padding: 0 8px;
}
header.header-minimal .theme-toggle {
    position: absolute;
    top: 2px;
    right: 16px;
    z-index: 200;
    background: var(--darker-bg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
    border-radius: 50%;
    opacity: 1 !important;
    pointer-events: auto !important;
}

/* Articles menu */
.articles-menu {
    list-style: none;
}

.article-menu-item {
    margin-bottom: 12px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.article-menu-item:last-child {
    margin-bottom: 0;
}

.article-menu-item.active {
    background: linear-gradient(135deg, var(--accent-color), #4300c1);
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.3);
}

.article-menu-link {
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s;
    display: block;
    padding: 12px 15px;
    border-radius: 8px;
    border: 1px solid transparent;
}

.article-menu-item:not(.active) .article-menu-link:hover {
    background-color: rgba(108, 92, 231, 0.1);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.article-menu-item.active .article-menu-link {
    color: white;
}

.article-menu-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.article-menu-title {
    font-weight: 600;
    font-size: 14px;
    line-height: 1.4;
}

.article-menu-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    opacity: 0.8;
}

.article-menu-author {
    color: inherit;
    opacity: 0.9;
}

.article-menu-time {
    color: inherit;
    opacity: 0.7;
}

/* Light theme adjustments for articles menu */
.light-theme .article-menu-item:not(.active) .article-menu-link:hover {
    background-color: rgba(108, 92, 231, 0.05);
}

.light-theme .article-menu-item.active {
    background: linear-gradient(135deg, var(--accent-color), #4300c1);
}

.grid-container {
    display: grid;
    grid-template-columns: 3fr 1.2fr;
    gap: 60px;
    align-items: flex-start;
}