/* ==========================================================================
   Клуб РИАС — Design System
   Community platform for РИАС-ЖКХ (rias-gkh.ru)
   ========================================================================== */

/* ---------- Custom Properties ---------- */
:root,
[data-theme="light"] {
    --color-primary: #1A2332;
    --color-primary-light: #243044;
    --color-accent: #2B7DE9;
    --color-accent-hover: #1B6FD4;
    --color-accent-soft: rgba(43, 125, 233, 0.12);
    --color-bg: #F5F7FA;
    --color-card: #FFFFFF;
    --color-text: #2D3748;
    --color-text-light: #718096;
    --color-text-inverse: #FFFFFF;
    --color-border: rgba(255, 255, 255, 0.15);
    --color-border-light: #E2E8F0;
    --color-success: #38A169;
    --color-warning: #E8910C;
    --color-danger: #E53E3E;
    --color-reaction-bg: #F0F2F5;
    --color-reaction-hover: #E4E6EA;
    --color-header-bg: #1A2332;
    --color-header-text: #FFFFFF;
    --color-sidebar-bg: linear-gradient(180deg, #1A2332 0%, #1E2A3A 100%);

    --sidebar-width: 280px;
    --sidebar-collapsed-width: 64px;
    --header-height: 64px;

    --radius: 16px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --radius-full: 9999px;

    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-card-hover: 0 12px 48px rgba(43, 125, 233, 0.15);

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);

    --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

[data-theme="dark"] {
    --color-primary: #0F1923;
    --color-primary-light: #1A2635;
    --color-accent: #4A9AF5;
    --color-accent-hover: #6DB3FF;
    --color-accent-soft: rgba(74, 154, 245, 0.15);
    --color-bg: #121B26;
    --color-card: #1A2635;
    --color-text: #E2E8F0;
    --color-text-light: #94A3B8;
    --color-text-inverse: #FFFFFF;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: #2D3B4E;
    --color-success: #48BB78;
    --color-warning: #F6AD55;
    --color-danger: #FC8181;
    --color-reaction-bg: #1E2D3D;
    --color-reaction-hover: #253545;
    --color-header-bg: #0F1923;
    --color-header-text: #E2E8F0;
    --color-sidebar-bg: linear-gradient(180deg, #0F1923 0%, #152030 100%);

    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-card-hover: 0 12px 48px rgba(74, 154, 245, 0.2);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

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

ul, ol {
    list-style: none;
}

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

/* Focus-visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

button:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px var(--color-accent-soft);
}

a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ---------- Utility ---------- */
.glass {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(14px) saturate(160%);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 20px;
}

.text-center { text-align: center; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-header-bg);
    display: flex;
    align-items: center;
    padding: 0 24px;
    z-index: 100;
    gap: 16px;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    min-width: 180px;
}

.header-logo a {
    color: var(--color-text-inverse);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.header-logo a:hover {
    color: var(--color-accent);
}

.sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    color: var(--color-text-inverse);
    font-size: 20px;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 24px;
}

.header-nav a {
    color: rgba(255, 255, 255, 0.7);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition-fast);
}

.header-nav a:hover {
    color: var(--color-text-inverse);
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
}

.header-nav a.active {
    color: var(--color-text-inverse);
    background: var(--color-accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

/* ---------- Search Bar ---------- */
.search-bar {
    position: relative;
    display: flex;
    align-items: center;
}

.search-bar input {
    width: 220px;
    height: 36px;
    padding: 0 14px 0 36px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--color-text-inverse);
    font-size: 13px;
    transition: var(--transition);
    outline: none;
}

.search-bar input::placeholder {
    color: rgba(255, 255, 255, 0.45);
}

.search-bar input:focus {
    width: 280px;
    background: rgba(255, 255, 255, 0.14);
    border-color: var(--color-accent);
}

.search-bar-icon {
    position: absolute;
    left: 10px;
    display: flex;
    align-items: center;
    pointer-events: none;
    opacity: 0.5;
    color: var(--color-text-inverse);
}

/* ---------- User Menu ---------- */
.user-menu {
    position: relative;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    cursor: pointer;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-fast);
}

.user-avatar:hover {
    border-color: var(--color-accent);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 200px;
    background: var(--color-card);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: var(--transition-fast);
    z-index: 110;
}

.user-menu:hover .user-dropdown,
.user-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown a {
    display: block;
    padding: 10px 16px;
    color: var(--color-text);
    font-size: 14px;
    transition: var(--transition-fast);
}

.user-dropdown a:hover {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}

.user-dropdown .divider {
    height: 1px;
    background: var(--color-border-light);
    margin: 4px 0;
}

.header-login {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: transparent;
    color: var(--color-text-inverse);
    border: 1.5px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    transition: var(--transition-fast);
}

.header-login:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-inverse);
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-1px);
}

/* ==========================================================================
   Sidebar
   ========================================================================== */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--color-sidebar-bg);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 90;
    display: flex;
    flex-direction: column;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.12) transparent;
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 4px;
}

.sidebar-nav {
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: rgba(255, 255, 255, 0.65);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    overflow: hidden;
    border-left: 3px solid transparent;
}

.sidebar-link:hover {
    color: var(--color-text-inverse);
    background: rgba(255, 255, 255, 0.08);
}

.sidebar-link.active {
    color: var(--color-text-inverse);
    background: rgba(43, 125, 233, 0.15);
    border-left-color: var(--color-accent);
}

.sidebar-link .icon {
    flex-shrink: 0;
    width: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: inherit;
}

.sidebar-link .icon svg {
    display: block;
}

.sidebar-link:hover .icon,
.sidebar-link.active .icon {
    color: var(--color-accent);
}

.sidebar-link .label {
    overflow: hidden;
    text-overflow: ellipsis;
    transition: opacity 0.2s ease, width 0.3s ease;
}

.sidebar-section {
    padding: 8px 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-title {
    padding: 12px 14px 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(255, 255, 255, 0.35);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-footer {
    margin-top: auto;
    padding: 16px 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-contacts,
.sidebar-copyright {
    padding: 4px 14px;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-contacts .label,
.sidebar-copyright .label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.25);
    letter-spacing: 0.02em;
}

/* --- Collapsed sidebar --- */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .sidebar-link .label,
.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .sidebar-contacts .label,
.sidebar.collapsed .sidebar-copyright .label {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.sidebar.collapsed .sidebar-link {
    justify-content: center;
    padding: 10px;
    border-left-width: 0;
}

.sidebar.collapsed .sidebar-link .icon {
    margin: 0;
}

.sidebar.collapsed .sidebar-section {
    padding: 8px 6px;
}

.sidebar.collapsed .sidebar-footer {
    padding: 12px 6px;
}

/* Tooltip on collapsed sidebar */
.sidebar.collapsed .sidebar-link {
    position: relative;
}

.sidebar.collapsed .sidebar-link::after {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(100% + 8px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
    z-index: 200;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.sidebar.collapsed .sidebar-link:hover::after {
    opacity: 1;
}

/* ==========================================================================
   Main Content
   ========================================================================== */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    padding: 24px;
    min-height: calc(100vh - var(--header-height));
    transition: var(--transition);
}

.sidebar.collapsed ~ .main-content,
body.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* ==========================================================================
   Card Grid
   ========================================================================== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

/* ---------- Article Card ---------- */
.article-card {
    background: var(--color-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.5s ease both;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

/* ---------- Meta icon ---------- */
.meta-icon {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.meta-icon svg {
    display: block;
    flex-shrink: 0;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--color-text-light);
    padding-top: 14px;
    border-top: 1px solid var(--color-border-light);
    flex-wrap: wrap;
}

.article-card-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-card-body h3 {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.35;
    color: var(--color-text);
    margin: 8px 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-body p {
    font-size: 13px;
    line-height: 1.6;
    color: var(--color-text-light);
    margin-bottom: 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-border-light);
}

.article-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-card:hover .article-card-cover img {
    transform: scale(1.06);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition-fast);
    border: none;
    cursor: pointer;
    white-space: nowrap;
    line-height: 1.4;
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: var(--color-text-inverse);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(43, 125, 233, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border: 1.5px solid var(--color-accent);
}

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

.btn-sm {
    padding: 6px 14px;
    font-size: 12px;
    border-radius: var(--radius-xs);
}

.btn-danger {
    background: var(--color-danger);
    color: var(--color-text-inverse);
}

.btn-danger:hover {
    background: #c53030;
    color: var(--color-text-inverse);
}

.btn-success {
    background: var(--color-success);
    color: var(--color-text-inverse);
}

.btn-success:hover {
    background: #2f855a;
    color: var(--color-text-inverse);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-light);
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    border: none;
}

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

/* ==========================================================================
   Forms
   ========================================================================== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    background: var(--color-card);
    color: var(--color-text);
    font-size: 14px;
    transition: var(--transition-fast);
    outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
    line-height: 1.6;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-light);
}

/* ==========================================================================
   Article Page
   ========================================================================== */
.article-page {
    max-width: 780px;
    margin: 0 auto;
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 48px;
    box-shadow: var(--shadow-sm);
}

.article-page__header {
    margin-bottom: 32px;
}

.article-page__title {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.25;
    color: var(--color-text);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.article-page__meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--color-text-light);
}

.article-page__content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text);
}

.article-page__content h2 {
    font-size: 24px;
    font-weight: 700;
    margin-top: 40px;
    margin-bottom: 16px;
    color: var(--color-text);
}

.article-page__content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 12px;
}

.article-page__content p {
    margin-bottom: 16px;
}

.article-page__content ul,
.article-page__content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.article-page__content ul { list-style: disc; }
.article-page__content ol { list-style: decimal; }

.article-page__content li {
    margin-bottom: 6px;
}

.article-page__content blockquote {
    border-left: 4px solid var(--color-accent);
    padding: 12px 20px;
    margin: 20px 0;
    background: var(--color-accent-soft);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--color-text);
}

.article-page__content pre {
    background: var(--color-primary);
    color: #e2e8f0;
    padding: 20px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 20px 0;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
}

.article-page__content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-accent-soft);
    padding: 2px 6px;
    border-radius: 4px;
}

.article-page__content pre code {
    background: none;
    padding: 0;
}

.article-page__content img {
    border-radius: var(--radius-sm);
    margin: 20px 0;
}

.article-page__content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-color: rgba(43, 125, 233, 0.3);
    text-underline-offset: 3px;
}

.article-page__content a:hover {
    text-decoration-color: var(--color-accent);
}

.article-page__content,
.article-page__content * {
    font-family: var(--font-family);
}

/* ==========================================================================
   Reactions
   ========================================================================== */
.reactions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    padding: 20px 0;
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
    margin: 24px 0;
}

.reaction-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 20px;
    border: none;
    background: var(--color-reaction-bg);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--color-text-light);
    box-shadow: none;
}

.reaction-btn .reaction-icon {
    display: flex;
    align-items: center;
}

.reaction-btn .reaction-icon svg {
    display: block;
}

.reaction-btn:hover:not(.disabled) {
    background: var(--color-reaction-hover);
}

.reaction-btn.reaction-like:hover:not(.disabled) {
    color: #2B7DE9;
}

.reaction-btn.reaction-dislike:hover:not(.disabled) {
    color: #6B7280;
}

.reaction-btn.reaction-fire:hover:not(.disabled) {
    color: #F59E0B;
}

.reaction-btn.reaction-useful:hover:not(.disabled) {
    color: #10B981;
}

.reaction-btn.active.reaction-like {
    background: rgba(43, 125, 233, 0.15);
    color: #2B7DE9;
}

.reaction-btn.active.reaction-dislike {
    background: rgba(107, 114, 128, 0.15);
    color: #6B7280;
}

.reaction-btn.active.reaction-fire {
    background: rgba(245, 158, 11, 0.15);
    color: #F59E0B;
}

.reaction-btn.active.reaction-useful {
    background: rgba(16, 185, 129, 0.15);
    color: #10B981;
}

.reaction-btn.disabled {
    pointer-events: none;
    opacity: 0.5;
    cursor: default;
}

.reaction-count {
    font-weight: 600;
    font-size: 13px;
}

.reaction-btn.loading {
    pointer-events: none;
    opacity: 0.6;
}

.reaction-btn.loading .reaction-icon {
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ==========================================================================
   Comments
   ========================================================================== */
.comments {
    margin-top: 40px;
}

.comments__title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--color-text);
}

.comment {
    display: flex;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border-light);
}

.comment__avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.comment__body {
    flex: 1;
    min-width: 0;
}

.comment__header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.comment__author {
    font-weight: 600;
    font-size: 14px;
    color: var(--color-text);
}

.comment__date {
    font-size: 12px;
    color: var(--color-text-light);
}

.comment__text {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text);
}

.comment__actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.comment__action {
    font-size: 12px;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition-fast);
    background: none;
    border: none;
    padding: 0;
}

.comment__action:hover {
    color: var(--color-accent);
}

.comment--reply {
    margin-left: 54px;
}

.comment-form {
    margin-top: 24px;
    padding: 20px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.comment-form textarea {
    width: 100%;
    min-height: 80px;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    background: var(--color-card);
    color: var(--color-text);
    font-size: 14px;
    resize: vertical;
    outline: none;
    transition: var(--transition-fast);
}

.comment-form textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.comment-form__actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 12px;
}

/* ==========================================================================
   Admin Tables
   ========================================================================== */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-card);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    font-size: 14px;
}

.admin-table th,
.admin-table td {
    padding: 12px 16px;
    text-align: left;
}

.admin-table th {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.admin-table tr:nth-child(even) {
    background: var(--color-bg);
}

.admin-table tr:hover {
    background: var(--color-accent-soft);
}

.admin-table td {
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border-light);
}

.admin-table .actions {
    display: flex;
    gap: 6px;
}

/* ==========================================================================
   Badges & Tags
   ========================================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge-blog {
    background: rgba(43, 125, 233, 0.12);
    color: #2B7DE9;
}

.badge-news {
    background: rgba(16, 185, 129, 0.12);
    color: #10B981;
}

.badge-qa {
    background: rgba(245, 158, 11, 0.12);
    color: #F59E0B;
}

.badge--primary {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}

.badge--success {
    background: rgba(56, 161, 105, 0.12);
    color: var(--color-success);
}

.badge--warning {
    background: rgba(232, 145, 12, 0.12);
    color: var(--color-warning);
}

.badge--danger {
    background: rgba(229, 62, 62, 0.12);
    color: var(--color-danger);
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 500;
    background: var(--color-bg);
    color: var(--color-text-light);
    border: 1px solid var(--color-border-light);
    transition: var(--transition-fast);
    cursor: pointer;
}

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

.tag.active {
    background: var(--color-accent);
    color: var(--color-text-inverse);
    border-color: var(--color-accent);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

/* ==========================================================================
   Load More
   ========================================================================== */
.load-more {
    display: flex;
    justify-content: center;
    padding: 40px 0 20px;
}

.load-more .btn {
    min-width: 200px;
}

/* ==========================================================================
   Feed Header (page title + filter tabs)
   ========================================================================== */
.feed-header {
    margin-bottom: 28px;
}

.feed-header__title {
    font-size: 26px;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

/* Breadcrumbs */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 20px;
}

.breadcrumbs a {
    color: var(--color-text-light);
}

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

.breadcrumbs .separator {
    color: var(--color-border-light);
    font-size: 12px;
}

.breadcrumbs .current {
    color: var(--color-text);
    font-weight: 500;
}

/* ==========================================================================
   Overlay (mobile sidebar backdrop)
   ========================================================================== */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 85;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.visible {
    display: block;
    opacity: 1;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.card-grid .article-card:nth-child(1)  { animation-delay: 0.05s; }
.card-grid .article-card:nth-child(2)  { animation-delay: 0.10s; }
.card-grid .article-card:nth-child(3)  { animation-delay: 0.15s; }
.card-grid .article-card:nth-child(4)  { animation-delay: 0.20s; }
.card-grid .article-card:nth-child(5)  { animation-delay: 0.25s; }
.card-grid .article-card:nth-child(6)  { animation-delay: 0.30s; }
.card-grid .article-card:nth-child(7)  { animation-delay: 0.35s; }
.card-grid .article-card:nth-child(8)  { animation-delay: 0.40s; }
.card-grid .article-card:nth-child(9)  { animation-delay: 0.45s; }

.search-toggle {
    display: none;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

/* Tablet */
@media (max-width: 1024px) {
    .sidebar {
        width: var(--sidebar-collapsed-width);
    }

    .sidebar .sidebar-link .label,
    .sidebar .sidebar-title,
    .sidebar .sidebar-contacts .label,
    .sidebar .sidebar-copyright .label {
        opacity: 0;
        width: 0;
        overflow: hidden;
    }

    .sidebar .sidebar-link {
        justify-content: center;
        padding: 10px;
        border-left-width: 0;
    }

    .sidebar .sidebar-link::after {
        content: attr(data-tooltip);
        position: absolute;
        left: calc(100% + 8px);
        top: 50%;
        transform: translateY(-50%);
        background: var(--color-primary);
        color: var(--color-text-inverse);
        padding: 4px 10px;
        border-radius: 6px;
        font-size: 12px;
        white-space: nowrap;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.15s ease;
        z-index: 200;
        box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }

    .sidebar .sidebar-link:hover::after {
        opacity: 1;
    }

    .sidebar .sidebar-section {
        padding: 8px 6px;
    }

    .sidebar .sidebar-footer {
        padding: 12px 6px;
    }

    .sidebar.expanded {
        width: var(--sidebar-width);
    }

    .sidebar.expanded .sidebar-link .label,
    .sidebar.expanded .sidebar-title,
    .sidebar.expanded .sidebar-contacts .label,
    .sidebar.expanded .sidebar-copyright .label {
        opacity: 1;
        width: auto;
    }

    .sidebar.expanded .sidebar-link {
        justify-content: flex-start;
        padding: 10px 14px;
        border-left-width: 3px;
    }

    .sidebar.expanded .sidebar-link::after {
        display: none;
    }

    .sidebar.expanded .sidebar-section {
        padding: 8px 12px;
    }

    .sidebar.expanded .sidebar-footer {
        padding: 16px 12px;
    }

    .sidebar.expanded ~ .main-content {
        margin-left: var(--sidebar-width);
    }

    .sidebar.expanded ~ .sidebar-overlay {
        display: block;
        opacity: 1;
    }

    .main-content {
        margin-left: var(--sidebar-collapsed-width);
    }

    .card-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* Mobile */
@media (max-width: 768px) {
    .header-nav {
        display: none;
    }

    .search-bar {
        display: none;
    }

    .search-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        color: var(--color-text-inverse);
        border-radius: var(--radius-sm);
    }

    .search-toggle:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    .search-bar.mobile-open {
        display: flex;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        padding: 12px 16px;
        background: var(--color-primary);
        z-index: 95;
        box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }

    .search-bar.mobile-open input {
        width: 100%;
    }

    .sidebar {
        width: var(--sidebar-width);
        transform: translateX(-100%);
    }

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

    .sidebar.open .sidebar-link .label,
    .sidebar.open .sidebar-title,
    .sidebar.open .sidebar-contacts .label,
    .sidebar.open .sidebar-copyright .label {
        opacity: 1;
        width: auto;
    }

    .sidebar.open .sidebar-link {
        justify-content: flex-start;
        padding: 10px 14px;
        border-left-width: 3px;
    }

    .sidebar.open .sidebar-link::after {
        display: none;
    }

    .sidebar.open .sidebar-section {
        padding: 8px 12px;
    }

    .sidebar.open .sidebar-footer {
        padding: 16px 12px;
    }

    .main-content {
        margin-left: 0;
        padding: 16px;
    }

    .card-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .article-page {
        padding: 24px 20px;
        border-radius: var(--radius-sm);
    }

    .article-page__title {
        font-size: 24px;
    }

    .comment--reply {
        margin-left: 28px;
    }

    .header {
        padding: 0 16px;
    }

    .header-logo {
        min-width: auto;
    }

    .header-actions {
        gap: 8px;
    }

    .admin-table {
        font-size: 12px;
    }

    .admin-table th,
    .admin-table td {
        padding: 8px 10px;
    }
}

/* Small mobile */
@media (max-width: 480px) {
    .article-card-meta {
        gap: 8px;
    }
}

/* Large screens */
@media (min-width: 1400px) {
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ==========================================================================
   Theme Switcher
   ========================================================================== */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    color: var(--color-header-text);
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
    background: none;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

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

[data-theme="light"] .theme-toggle .icon-moon,
:root:not([data-theme]) .theme-toggle .icon-moon {
    display: block;
}

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

/* ==========================================================================
   User Layout (no sidebar)
   ========================================================================== */
.layout-user .main-content {
    margin-left: 0;
}

.layout-user .sidebar {
    display: none;
}

.layout-user .sidebar-overlay {
    display: none;
}

.layout-user .sidebar-toggle {
    display: none;
}

/* ==========================================================================
   Admin Layout (with sidebar)
   ========================================================================== */
.admin-sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: 240px;
    background: var(--color-card);
    border-right: 1px solid var(--color-border-light);
    overflow-y: auto;
    z-index: 90;
    padding: 16px 0;
}

.admin-sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 0 8px;
}

.admin-sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    color: var(--color-text-light);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition-fast);
}

.admin-sidebar-link:hover {
    color: var(--color-text);
    background: var(--color-accent-soft);
}

.admin-sidebar-link.active {
    color: var(--color-accent);
    background: var(--color-accent-soft);
    font-weight: 600;
}

.admin-sidebar-link .icon {
    flex-shrink: 0;
    width: 20px;
    display: flex;
    align-items: center;
}

.admin-sidebar-section {
    padding: 20px 24px 8px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-light);
}

.layout-admin .main-content {
    margin-left: 240px;
}

@media (max-width: 768px) {
    .admin-sidebar {
        display: none;
    }
    .layout-admin .main-content {
        margin-left: 0;
    }
}

/* ==========================================================================
   Forum styles
   ========================================================================== */
.forum-categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.forum-category-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.forum-category-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.forum-category-card .category-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--color-accent-soft);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.forum-category-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.forum-category-card p {
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.forum-category-card .topic-count {
    font-size: 12px;
    color: var(--color-text-light);
}

.topic-list {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.topic-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border-light);
    transition: var(--transition-fast);
}

.topic-item:last-child {
    border-bottom: none;
}

.topic-item:hover {
    background: var(--color-accent-soft);
}

.topic-item-body {
    flex: 1;
    min-width: 0;
}

.topic-item-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.topic-item-title a {
    color: inherit;
}

.topic-item-title a:hover {
    color: var(--color-accent);
}

.topic-item-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--color-text-light);
}

.topic-item-stats {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--color-text-light);
    flex-shrink: 0;
}

.topic-item-stats .stat {
    display: flex;
    align-items: center;
    gap: 4px;
}

.topic-closed-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    background: rgba(229, 62, 62, 0.1);
    color: var(--color-danger);
    margin-left: 8px;
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 24px 0;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 8px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition-fast);
}

.pagination a:hover {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}

.pagination .active {
    background: var(--color-accent);
    color: var(--color-text-inverse);
}

.pagination .disabled {
    opacity: 0.4;
    pointer-events: none;
}

/* Section header with "see all" link */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 22px;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.section-header .see-all {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
}

/* Home forum preview */
.home-section {
    margin-top: 48px;
}

/* ==========================================================================
   Print
   ========================================================================== */
@media print {
    .header,
    .sidebar,
    .sidebar-toggle,
    .reactions,
    .comment-form,
    .load-more {
        display: none !important;
    }

    .main-content {
        margin: 0 !important;
        padding: 0 !important;
    }

    .article-page {
        box-shadow: none;
        padding: 0;
    }
}