/* ============================================
   Cross-Document View Transitions (Chrome 111+)
   平滑页面切换，替代硬刷新闪白。旧浏览器自动降级。
   ============================================ */
@view-transition {
    navigation: auto;
}

/* Header 和胶囊导航保持原位，不参与整体淡出（避免闪烁） */
#Top {
    view-transition-name: site-header;
}

.header-pill-tabs {
    view-transition-name: header-pill-tabs;
}

::view-transition-old(site-header),
::view-transition-new(site-header),
::view-transition-old(header-pill-tabs),
::view-transition-new(header-pill-tabs) {
    animation-duration: 0s;
}

/* 主内容区：短淡入淡出 */
::view-transition-old(root) {
    animation: 160ms ease-out both vt-fade-out;
}

::view-transition-new(root) {
    animation: 200ms ease-in both vt-fade-in;
}

@keyframes vt-fade-out {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

@keyframes vt-fade-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* ============================================
   CSS Variables for Theme Support
   ============================================ */
:root {
    --bg-primary: #e2e2e2;
    --bg-secondary: #fff;
    --bg-tertiary: #f9f9f9;
    --bg-input: #fff;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --border-color: #e2e2e2;
    --border-dark: rgba(0, 0, 0, 0.22);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --link-color: var(--text-secondary);
    --link-hover: #111827;
    --node-tag-bg: #f5f5f5;
    --code-bg: #f4f4f4;
    --star-border-color: var(--bg-secondary);
    --card-radius: 12px;
    --scroll-fab-bg: #0c1f4a;
    --scroll-fab-bg-hover: #0c1f4a;
    --scroll-fab-border: #0c1f4a;
    --scroll-fab-icon: #ffffff;
    --scroll-fab-shadow: rgba(12, 31, 74, 0.32);
    --scroll-fab-surface: #0c1f4a;

    /* Rainbow capsule (MinIO-style) */
    --rainbow-color-1: #667eea;
    --rainbow-color-2: #764ba2;
    --rainbow-color-3: #f093fb;
    --rainbow-color-4: #f5576c;
    --rainbow-color-5: #4facfe;
    --rainbow-color-6: #1fc9d2;
    --rainbow-border-size: 2px;
    --rainbow-speed: 6s;
    --rainbow-bg: linear-gradient(270deg,
            var(--rainbow-color-1),
            var(--rainbow-color-2),
            var(--rainbow-color-3),
            var(--rainbow-color-4),
            var(--rainbow-color-5),
            var(--rainbow-color-6),
            var(--rainbow-color-1));

    --avatar-border-width: 2px;
    --avatar-gap: 1px;
    --avatar-size: 42px;
    --avatar-size-lg: 64px;
    --avatar-size-lg-mobile: 56px;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --bg-input: #3a3a3a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #888;
    --border-color: #444;
    --border-dark: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --link-color: #c0c0c0;
    --link-hover: #ffffff;
    --node-tag-bg: #3a3a3a;
    --code-bg: #3a3a3a;
    --scroll-fab-bg: #0891b2;
    --scroll-fab-bg-hover: #0891b2;
    --scroll-fab-border: #0891b2;
    --scroll-fab-icon: #ffffff;
    --scroll-fab-shadow: rgba(8, 145, 178, 0.34);
    --scroll-fab-surface: #0891b2;
}

/* Global Reset */
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "WenQuanYi Micro Hei", sans-serif !important;
    background-color: var(--bg-primary);
    margin: 0;
    padding: 0;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    color: var(--link-color);
    text-decoration: none;
    cursor: pointer;
}

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

/* Layout */
#Wrapper {
    background-color: var(--bg-primary);
    background-repeat: repeat-x;
    text-align: center;
}

.content {
    min-width: 600px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    text-align: left;
}

/* Header */
#Top {
    text-align: center;
    background-color: var(--bg-secondary);
    height: 44px;
    font-size: 15px;
    font-weight: 500;
    background-size: 44px 44px;
    border-bottom: 1px solid var(--border-dark);
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
}

#Top .content {
    display: flex;
    width: 100%;
    align-items: center;
    gap: 12px;
}

.header-left {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-shrink: 0;
}

.logo {
    font-size: 32px;
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    line-height: 1.2;
}

.logo:hover {
    text-decoration: none;
}

.logo-n {
    position: relative;
    display: inline-block;
}

.logo-n-letter {
    position: relative;
    z-index: 1;
    display: inline-block;
}

@keyframes aiStarEnter {
    0% {
        transform: rotate(-360deg);
        opacity: 0;
    }

    60% {
        opacity: 1;
    }

    100% {
        transform: rotate(0deg);
        opacity: 1;
    }
}

.logo-n .ai-star {
    position: absolute;
    top: 50%;
    left: -0.48em;
    width: 0.65em;
    height: 0.65em;
    margin-top: -0.325em;
    z-index: 2;
    opacity: 1;

    transition: transform 0.6s cubic-bezier(0.2, 0, 0, 1);
    transform: rotate(0deg);
    animation: aiStarEnter 0.8s cubic-bezier(0.2, 0, 0, 1);
}

.logo:hover .ai-star,
.logo:active .ai-star,
.logo:focus-visible .ai-star {
    transform: rotate(180deg);
}

@media (prefers-reduced-motion: reduce) {
    .logo-n .ai-star {
        animation: none;
        transition: none;
    }
}

.logo-subtitle {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: normal;
    white-space: nowrap;
}

/* Header Boards (N 系列导航) */
.header-boards {
    flex: 1;
    min-width: 0;
    display: grid;
    grid-template-columns: 1fr 270px;
    align-items: center;
    column-gap: 20px;
    overflow: visible;
}

.header-boards-primary,
.header-boards-secondary {
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    white-space: nowrap;
}

.header-boards-secondary {
    justify-content: flex-start;
    gap: 12px;
}

.header-boards-secondary .header-nav {
    margin-left: auto;
}

.header-boards-primary {
    overflow-x: auto;
    scrollbar-width: none;
}

.header-boards-primary::-webkit-scrollbar {
    display: none;
}

.header-boards .nav-board-item {
    margin-right: 0;
    padding: 4px 6px;
    font-size: 12px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    line-height: 1.2;
    min-height: 0;
}

.header-boards .nav-filter-chip {
    min-height: 0;
    padding: 4px 12px;
    font-size: 13px;
}

/* ============================================
   共享 Pill 切换器组件 (.pill-tabs / .pill-tab)
   被 Header 导航、messages.html、profile.html 复用
   ============================================ */
.pill-tabs {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 999px;
    padding: 3px;
    gap: 0;
}

[data-theme="dark"] .pill-tabs {
    background: rgba(255, 255, 255, 0.08);
}

.pill-tab {
    appearance: none;
    -webkit-appearance: none;
    border: none;
    background: transparent;
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease-in-out, color 0.3s ease-in-out;
    white-space: nowrap;
    line-height: 1.2;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.pill-tab:hover {
    color: var(--text-primary);
    text-decoration: none;
}

.pill-tab.active,
.pill-tab[aria-current="page"] {
    background: #0c1f4a;
    color: #ffffff;
    font-weight: 600;
}

[data-theme="dark"] .pill-tab.active,
[data-theme="dark"] .pill-tab[aria-current="page"] {
    background: #0891b2;
    color: #ffffff;
}

.pill-tab.active:hover,
.pill-tab[aria-current="page"]:hover {
    background: #0c1f4a;
    color: #ffffff;
    text-decoration: none;
}

[data-theme="dark"] .pill-tab.active:hover,
[data-theme="dark"] .pill-tab[aria-current="page"]:hover {
    background: #0891b2;
    color: #ffffff;
    text-decoration: none;
}

/* Header 导航专属：链接文字无下划线（补充 pill-tab 不覆盖的场景） */
.header-boards .header-next-link {
    text-decoration: none;
}

.header-feed,
.header-more {
    display: inline-flex;
    align-items: center;
}

.header-feed-menu a.active {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.header-feed-btn[aria-expanded="true"],
.header-more-btn[aria-expanded="true"] {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
    color: var(--text-primary);
}


/* Next更多 should look distinct from New/Now */
.header-boards-secondary .header-more-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 999px;
    padding: 7px 14px;
    font-size: 13px;
    line-height: 1.2;
}

.header-boards-secondary .header-more-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--text-muted);
    color: var(--text-primary);
    text-decoration: none;
}

.header-boards-secondary .header-more-btn[aria-expanded="true"] {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .header-boards-secondary .header-more-btn[aria-expanded="true"] {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Next更多 dropdown */
.header-more {
    position: relative;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.header-more-caret {
    font-size: 12px;
    opacity: 0.9;
}

.header-more-menu {
    position: absolute;
    top: 0;
    left: 0;
    min-width: 160px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 10px 30px var(--shadow-color);
    padding: 6px;
    display: none;
    z-index: 1000;
}

.header-more-menu.show {
    display: block;
}

.header-more-menu a {
    display: block;
    padding: 10px 10px;
    border-radius: 6px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    background: transparent;
}

.header-more-menu a:hover {
    background: var(--bg-tertiary);
    text-decoration: none;
}

.header-more-menu .nav-board-item {
    margin-right: 0;
}

.header-more-menu .nav-board-item.active {
    background: #333344;
    color: #fff;
}

/* Search Box */
.header-search {
    --search-inner-bg: var(--bg-input);

    flex-shrink: 0;
    display: flex;
    justify-content: flex-end;
    /* Align right towards menu */
    margin-right: 0;
    max-width: none;
    min-width: 40px;
    position: relative;
    height: 34px;
    box-sizing: border-box;

    /* Rainbow border on wrapper so autofill can't override it */
    padding: var(--rainbow-border-size);
    border-radius: 999px;
    background: var(--rainbow-bg);
    background-size: 400% 400%;
    background-position: 0% 50%;
    background-repeat: no-repeat;
    animation: rainbow-flow var(--rainbow-speed) linear infinite;
}

/* Magic search icon */
.header-search .search-icon {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px 999px 999px 6px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-muted);
    pointer-events: auto;
    cursor: pointer;
    z-index: 5;
    opacity: 0.78;
    transition: opacity 0.2s, color 0.2s, transform 0.2s, filter 0.2s, background-color 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.header-search .search-icon:hover {
    color: var(--rainbow-color-3);
    opacity: 0.95;
}

.header-search .search-icon svg {
    display: block;
}

.header-search .search-icon .search-sparkle {
    fill: var(--rainbow-color-3);
}

.header-search .search-icon:focus-visible {
    outline: 2px solid rgba(8, 145, 178, 0.45);
    outline-offset: 2px;
}

/* Using ID selector to override generic input[type="text"] styles (width: 300px) */
#searchInput {
    /* Base State: Half-length pill */
    width: 220px !important;
    height: 100%;
    padding-left: 14px;
    padding-right: 40px;

    /* Formatting */
    border: none;
    border-radius: 999px;
    /* Smooth capsule for 34px height */
    background: var(--search-inner-bg);
    color: var(--text-primary);
    text-overflow: ellipsis;

    font-size: 14px;
    outline: none;
    cursor: text;
    box-sizing: border-box;

    /* Positioning to allow expansion to the LEFT if needed, or just normal expansion */
    float: right;
    /* Keeps it aligned to right side of its container */

    /* Animation */
    transition: width 0.3s cubic-bezier(0.4, 0.0, 0.2, 1),
        background-color 0.2s ease,
        border-color 0.2s ease,
        padding-left 0.2s ease,
        color 0.2s ease;
}

/* Hover state */
.header-search:hover {
    box-shadow: 0 6px 18px var(--shadow-color);
}

/* Focus State: Expanded */
#searchInput:focus {
    width: 320px !important;
    /* Fixed expanded width */
    color: var(--text-primary);
    cursor: text;
    padding-left: 15px;
    /* Text padding */
    padding-right: 40px;
    /* Space for icon on right */
}

.header-search:focus-within {
    box-shadow: 0 10px 30px var(--shadow-color);
}

#searchInput::placeholder {
    color: var(--text-muted);
    opacity: 1;
    transition: opacity 0.15s ease, color 0.15s ease;
}

#searchInput:focus::placeholder {
    color: transparent;
    opacity: 0;
}

/* Keep rainbow border when browser auto-fills / picks history value */
#searchInput:-webkit-autofill,
#searchInput:-webkit-autofill:hover,
#searchInput:-webkit-autofill:focus,
#searchInput:-webkit-autofill:active,
#searchInput:-internal-autofill-selected,
#searchInput:-internal-autofill-previewed {
    border-radius: 999px !important;
    -webkit-text-fill-color: var(--text-primary) !important;
    caret-color: var(--text-primary) !important;
    background-color: transparent !important;
    -webkit-box-shadow: 0 0 0 1000px var(--search-inner-bg) inset !important;
    box-shadow: 0 0 0 1000px var(--search-inner-bg) inset !important;
}

#searchInput:-moz-autofill {
    border-radius: 999px !important;
    background-color: transparent !important;
    box-shadow: 0 0 0 1000px var(--search-inner-bg) inset !important;
}

/* When typing, keep the icon visible (click-to-search) */
.header-search:focus-within .search-icon {
    opacity: 0.9;
}

/* If there is a query, make the icon look like an explicit action button */
#searchInput:not(:placeholder-shown)+.search-icon {
    opacity: 1;
    color: #ffffff;
    background: #0c1f4a;
    border-color: #0c1f4a;
    box-shadow: 0 4px 14px rgba(12, 31, 74, 0.30);
    filter: none;
    transform: translateY(-50%) scale(1.05);
}

[data-theme="dark"] #searchInput:not(:placeholder-shown)+.search-icon {
    color: #ffffff;
    background: #0891b2;
    border-color: #0891b2;
    box-shadow: 0 4px 14px rgba(8, 145, 178, 0.35);
}

#searchInput:not(:placeholder-shown)+.search-icon:hover {
    opacity: 1;
    color: #ffffff;
    background: #16306e;
    border-color: #16306e;
    box-shadow: 0 6px 18px rgba(12, 31, 74, 0.38);
    filter: none;
}

[data-theme="dark"] #searchInput:not(:placeholder-shown)+.search-icon:hover {
    background: #0ea5c9;
    border-color: #0ea5c9;
    box-shadow: 0 6px 18px rgba(8, 145, 178, 0.42);
}

#searchInput:not(:placeholder-shown)+.search-icon:active {
    transform: translateY(-50%) scale(0.99);
    opacity: 1;
}

@keyframes rainbow-flow {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .header-search {
        animation: none;
    }
}

/* Header Navigation */
.header-nav {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
    padding: 5px;
}

/* Mobile Menu Overlay */
.mobile-menu {
    display: none;
    position: fixed;
    top: 45px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 20px;
    box-shadow: 0 4px 12px var(--shadow-color);
    z-index: 999;
}

.mobile-menu.show {
    display: block;
}

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.mobile-menu-content a {
    padding: 12px 0;
    font-size: 15px;
    border-bottom: 1px solid var(--border-color);
    display: block;
    text-decoration: none;
    color: var(--text-primary);
}

.mobile-menu-content a:last-of-type {
    border-bottom: none;
}

.mobile-menu-content .theme-toggle {
    margin-top: 10px;
    padding: 12px 0;
    font-size: 20px;
    background: none;
    border: none;
    border-top: 1px solid var(--border-color);
    text-align: left;
    width: 100%;
    color: var(--text-primary);
    cursor: pointer;
}

/* Main Box Styles */
.box {
    background-color: var(--bg-secondary);
    border-radius: var(--card-radius);
    box-shadow: 0 2px 3px var(--shadow-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
    transition: background-color 0.3s ease;
}

.cell {
    padding: 12px 24px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    line-height: 120%;
    text-align: left;
}

.cell:last-child {
    border-bottom: none;
}

.header {
    padding: 12px 24px;
    font-size: 15px;
    line-height: 120%;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
    border-top-left-radius: var(--card-radius);
    border-top-right-radius: var(--card-radius);
}

/* Form Styles */
input[type="text"],
input[type="password"],
input[type="email"],
textarea {
    width: 300px;
    padding: 5px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    box-shadow: inset 0 1px 2px var(--shadow-color);
    background-color: var(--bg-input);
    color: var(--text-primary);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Auth forms use V2-style `.sl` inputs. Center the form and keep a reasonable width on desktop. */
#loginForm,
#registerForm,
#resetRequestForm,
#resetConfirmForm {
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
}

#loginForm table,
#registerForm table,
#resetRequestForm table,
#resetConfirmForm table {
    width: 100%;
    table-layout: fixed;
}

input.sl {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

#loginForm button[type="submit"],
#registerForm button[type="submit"],
#resetRequestForm button[type="submit"],
#resetConfirmForm button[type="submit"] {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

button {
    padding: 5px 15px;
    font-size: 14px;
    font-weight: bold;
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: var(--bg-primary);
}

/* Utility */
.fr {
    float: right;
}

.fl {
    float: left;
}

.sep5 {
    height: 5px;
}

.sep10 {
    height: 10px;
}

.sep20 {
    height: 20px;
}

/* Topic List */
.item_title {
    display: block;
    font-size: 15px;
    line-height: 140%;
    word-wrap: break-word;
    word-break: break-word;
    overflow-wrap: break-word;
}

.item_title>span,
.item_title>a {
    vertical-align: middle;
}

.topic_content,
.reply_content {
    line-height: 1.75;
}

img.emoji-inline {
    width: 22px;
    height: 22px;
    display: inline-block;
    vertical-align: -3px;
    margin: 0 1px;
}

.item_title a {
    color: var(--text-primary);
}

/* Discuz-style prefix tag before title: modern pill badge */
.topic-prefix-tag {
    display: inline-block;
    background: rgba(120, 120, 130, 0.10);
    color: var(--text-primary);
    padding: 1px 8px;
    border-radius: 999px;
    font-size: 0.88em;
    font-weight: inherit;
    font-family: inherit;
    line-height: inherit;
    margin-right: 5px;
    vertical-align: middle;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.topic-prefix-tag::before {
    content: '#';
    margin-right: 1px;
    opacity: 0.6;
}

[data-theme="dark"] .topic-prefix-tag {
    background: rgba(180, 180, 190, 0.14);
    color: var(--text-primary);
}

.topic_meta {
    font-size: 12px;
    color: var(--text-muted);
}

.topic-list-item .topic_meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.topic-list-item .topic-meta-sep {
    color: var(--text-muted);
    opacity: 0.75;
}

.topic-list-item .topic-author {
    color: var(--text-muted);
    font-weight: 500;
}

.topic-list-item .topic-author:hover {
    color: var(--text-secondary);
}

.topic-list-item .topic-time {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
}

.topic-list-item .topic-time svg {
    width: 16px;
    height: 16px;
    opacity: 0.85;
}

.topic-metrics-inline {
    display: none;
    align-items: center;
    gap: 10px;
}

.topic-metric {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--text-secondary);
    background: rgba(99, 130, 181, 0.16);
    border: none;
    border-radius: 999px;
    padding: 6px 12px;
    line-height: 1.2;
    min-width: 60px;
    justify-content: center;
}

[data-theme="dark"] .topic-metric {
    background: rgba(255, 255, 255, 0.10);
}

.topic-metric svg {
    width: 16px;
    height: 16px;
    opacity: 0.85;
}

.topic-metric-number {
    font-variant-numeric: tabular-nums;
}

.topic-avatar {
    width: var(--avatar-size);
    height: var(--avatar-size);
    border-radius: 50%;
    display: block;
    box-sizing: border-box;
}

.topic-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    box-sizing: border-box;
}

.topic-avatar>a {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

/* ============================================
   Avatar Role Styles
   ============================================ */
.avatar-role-regular,
.avatar-role-admin,
.avatar-role-moderator,
.avatar-role-vip {
    border-radius: 50%;
    box-sizing: border-box;
}

.avatar-role-regular img,
.avatar-role-admin img,
.avatar-role-moderator img,
.avatar-role-vip img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    box-sizing: border-box;
    border: 0;
    padding: var(--avatar-gap);
    background: var(--bg-secondary);
}

.avatar-role-regular {
    border: var(--avatar-border-width) solid #e5e7eb;
}

.avatar-role-admin {
    border: var(--avatar-border-width) solid #fbbc04;
}

.avatar-role-moderator {
    border: var(--avatar-border-width) solid #4285f4;
}

.avatar-role-vip {
    background: conic-gradient(from 0deg,
            #ea4335 0deg 90deg,
            #fbbc04 90deg 180deg,
            #34a853 180deg 270deg,
            #4285f4 270deg 360deg);
    padding: var(--avatar-border-width);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .avatar-role-regular {
    border-color: #4b5563;
}

[data-theme="dark"] .avatar-role-admin {
    border-color: #fbbc04;
}

[data-theme="dark"] .avatar-role-moderator {
    border-color: #4285f4;
}

/* ============================================
   Floor Header Row (共享：头像 + 用户名 + 元信息)
   ============================================ */
.floor-header-row {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 6px 10px;
}

.floor-avatar {
    flex-shrink: 0;
}

.floor-avatar .topic-avatar {
    width: var(--avatar-size);
    height: var(--avatar-size);
}

.topic-avatar.avatar-size-lg {
    width: var(--avatar-size-lg);
    height: var(--avatar-size-lg);
}

@media screen and (max-width: 768px) {
    .topic-avatar.avatar-size-lg {
        width: var(--avatar-size-lg-mobile);
        height: var(--avatar-size-lg-mobile);
    }
}

.floor-left {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    flex: 1 1 auto;
}

.floor-right {
    margin-left: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    text-align: right;
    white-space: nowrap;
}

.floor-user-line {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 14px;
    line-height: 1.4;
}

.floor-user-line a {
    font-weight: 600;
    color: var(--text-primary);
}

.floor-meta-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px 12px;
    color: var(--text-muted);
    font-size: 12px;
    line-height: 1.4;
}

.floor-actions {
    white-space: nowrap;
}

.floor-actions a {
    color: var(--text-secondary);
    transition: color 0.15s ease;
}

.floor-actions a:hover {
    color: var(--text-primary);
}

.floor-actions a.delete-link {
    color: #c0392b;
}

.floor-actions a.delete-link:hover {
    color: #e74c3c;
}

.node_tag {
    background: rgba(14, 165, 233, 0.12);
    color: var(--text-primary);
    font-size: 10px;
    line-height: 14px;
    display: inline-flex;
    align-items: center;
    padding: 0 5px;
    border-radius: 3px;
    text-decoration: none;
    font-weight: 500;
    height: 16px;
    vertical-align: middle;
    transition: background 0.15s ease;
}

.node_tag:hover {
    filter: brightness(0.93);
}

/* 按板块 slug 区分颜色 */
/* Node节点 - 蓝 */
.node_tag[data-slug="node"] {
    background: rgba(14, 165, 233, 0.12);
}

/* Native信创 - 红 */
.node_tag[data-slug="native"] {
    background: rgba(239, 68, 68, 0.10);
}

/* News资讯 - 琥珀橙 */
.node_tag[data-slug="news"] {
    background: rgba(245, 158, 11, 0.12);
}

/* Nexus贸易 - 绿 */
.node_tag[data-slug="nexus"] {
    background: rgba(34, 197, 94, 0.12);
}

/* Night夜话 - 紫 */
.node_tag[data-slug="night"] {
    background: rgba(139, 92, 246, 0.12);
}

[data-theme="dark"] .node_tag {
    color: var(--text-primary);
}

[data-theme="dark"] .node_tag[data-slug="node"] {
    background: rgba(14, 165, 233, 0.18);
}

[data-theme="dark"] .node_tag[data-slug="native"] {
    background: rgba(239, 68, 68, 0.16);
}

[data-theme="dark"] .node_tag[data-slug="news"] {
    background: rgba(245, 158, 11, 0.18);
}

[data-theme="dark"] .node_tag[data-slug="nexus"] {
    background: rgba(34, 197, 94, 0.16);
}

[data-theme="dark"] .node_tag[data-slug="night"] {
    background: rgba(139, 92, 246, 0.18);
}


/* ============================================
   OP Badge (楼主标记)
   ============================================ */
.op-badge {
    display: inline-flex;
    align-items: center;
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 600;
    line-height: 1.2;
    margin-left: 4px;
    vertical-align: middle;
    background: rgba(16, 185, 129, 0.14);
    border: 1px solid rgba(16, 185, 129, 0.45);
    color: #059669;
}

[data-theme="dark"] .op-badge {
    color: #34d399;
    border-color: rgba(52, 211, 153, 0.6);
    background: rgba(52, 211, 153, 0.16);
}

/* ============================================
   User Group Badge (用户组标记)
   ============================================ */
.user-group-badge {
    display: inline-flex;
    align-items: center;
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 600;
    line-height: 1.2;
    margin-left: 4px;
    vertical-align: middle;
    border: 1px solid transparent;
}

/* lv1 - 灰色，低调 */
.user-group-badge.user-group-lv1 {
    background: rgba(148, 163, 184, 0.12);
    border-color: rgba(148, 163, 184, 0.3);
    color: #64748b;
}

/* lv2 - 蓝灰色，普通 */
.user-group-badge.user-group-lv2 {
    background: rgba(100, 116, 139, 0.12);
    border-color: rgba(100, 116, 139, 0.35);
    color: #475569;
}

/* lv3 - 青色，高级 */
.user-group-badge.user-group-lv3 {
    background: rgba(6, 182, 212, 0.12);
    border-color: rgba(6, 182, 212, 0.4);
    color: #0891b2;
}

/* vip - 金色 */
.user-group-badge.user-group-vip {
    background: rgba(245, 158, 11, 0.15);
    border-color: rgba(245, 158, 11, 0.45);
    color: #b45309;
}

/* moderator - 蓝色 */
.user-group-badge.user-group-moderator {
    background: rgba(59, 130, 246, 0.14);
    border-color: rgba(59, 130, 246, 0.45);
    color: #1d4ed8;
}

/* admin - 紫色渐变 */
.user-group-badge.user-group-admin {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.18), rgba(236, 72, 153, 0.18));
    border-color: rgba(139, 92, 246, 0.5);
    color: #7c3aed;
}

/* pending - 橙色警示 */
.user-group-badge.user-group-pending {
    background: rgba(251, 146, 60, 0.14);
    border-color: rgba(251, 146, 60, 0.45);
    color: #c2410c;
}

/* blacklist - 红色 */
.user-group-badge.user-group-blacklist {
    background: rgba(239, 68, 68, 0.14);
    border-color: rgba(239, 68, 68, 0.45);
    color: #dc2626;
}

/* --- User Group Badge: Dark Theme --- */
[data-theme="dark"] .user-group-badge.user-group-lv1 {
    color: #94a3b8;
    background: rgba(148, 163, 184, 0.16);
}

[data-theme="dark"] .user-group-badge.user-group-lv2 {
    color: #cbd5e1;
    background: rgba(100, 116, 139, 0.2);
}

[data-theme="dark"] .user-group-badge.user-group-lv3 {
    color: #22d3ee;
    border-color: rgba(6, 182, 212, 0.55);
    background: rgba(6, 182, 212, 0.18);
}

[data-theme="dark"] .user-group-badge.user-group-vip {
    color: #fbbf24;
    border-color: rgba(245, 158, 11, 0.55);
    background: rgba(245, 158, 11, 0.16);
}

[data-theme="dark"] .user-group-badge.user-group-moderator {
    color: #93c5fd;
    border-color: rgba(59, 130, 246, 0.6);
    background: rgba(59, 130, 246, 0.16);
}

[data-theme="dark"] .user-group-badge.user-group-admin {
    color: #c4b5fd;
    border-color: rgba(139, 92, 246, 0.6);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.22), rgba(236, 72, 153, 0.22));
}

[data-theme="dark"] .user-group-badge.user-group-pending {
    color: #fdba74;
    border-color: rgba(251, 146, 60, 0.55);
    background: rgba(251, 146, 60, 0.16);
}

[data-theme="dark"] .user-group-badge.user-group-blacklist {
    color: #fca5a5;
    border-color: rgba(239, 68, 68, 0.55);
    background: rgba(239, 68, 68, 0.16);
}

.admin-pill {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 1px 4px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    color: var(--text-secondary);
    background: var(--bg-primary);
    font-size: 10px;
    line-height: 1.2;
    vertical-align: middle;
    font-weight: 500;
}

.admin-pill.admin-pill-pinned {
    background: rgba(99, 102, 241, 0.14);
    border-color: rgba(99, 102, 241, 0.45);
    color: #4338ca;
    font-weight: 600;
}

.admin-pill.admin-pill-locked {
    background: rgba(107, 114, 128, 0.14);
    border-color: rgba(107, 114, 128, 0.45);
    color: #374151;
    font-weight: 600;
}

.admin-pill.admin-pill-icon {
    background: transparent !important;
    border: none !important;
    padding: 0 !important;
    border-radius: 0 !important;
    line-height: 20px !important;
    vertical-align: middle !important;
}

.admin-pill.admin-pill-icon svg {
    width: 20px;
    height: 20px;
    display: block;
}

.admin-pill.admin-pill-icon.admin-pill-pinned svg {
    width: 22px;
    height: 22px;
}

.admin-pill.admin-pill-icon.admin-pill-pinned {
    color: #0891b2 !important;
}

.admin-pill.admin-pill-icon.admin-pill-locked {
    color: #0891b2 !important;
}

[data-theme="dark"] .admin-pill.admin-pill-pinned {
    color: #a5b4fc;
    border-color: rgba(99, 102, 241, 0.6);
    background: rgba(99, 102, 241, 0.16);
}

[data-theme="dark"] .admin-pill.admin-pill-locked {
    color: #cbd5e1;
    border-color: rgba(107, 114, 128, 0.6);
    background: rgba(107, 114, 128, 0.16);
}

[data-theme="dark"] .admin-pill.admin-pill-icon.admin-pill-pinned {
    color: #22d3ee !important;
}

[data-theme="dark"] .admin-pill.admin-pill-icon.admin-pill-locked {
    color: #22d3ee !important;
}

.admin-pill.admin-pill-access {
    background: rgba(234, 179, 8, 0.14);
    border-color: rgba(234, 179, 8, 0.45);
    color: #ca8a04;
    font-weight: 600;
}

.admin-pill.admin-pill-icon.admin-pill-access {
    color: #ca8a04 !important;
}

[data-theme="dark"] .admin-pill.admin-pill-access {
    color: #fde047;
    border-color: rgba(234, 179, 8, 0.6);
    background: rgba(234, 179, 8, 0.16);
}

[data-theme="dark"] .admin-pill.admin-pill-icon.admin-pill-access {
    color: #fde047 !important;
}

.access-label {
    font-size: 12px;
    color: #ca8a04;
    font-weight: 600;
    vertical-align: middle;
}

[data-theme="dark"] .access-label {
    color: #fde047;
}

.reply-form-notice {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid rgba(8, 145, 178, 0.35);
    background: rgba(8, 145, 178, 0.12);
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.4;
}

.reply-form-notice svg {
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
    color: #0891b2;
}

[data-theme="dark"] .reply-form-notice {
    border-color: rgba(34, 211, 238, 0.4);
    background: rgba(34, 211, 238, 0.12);
    color: var(--text-primary);
}

[data-theme="dark"] .reply-form-notice svg {
    color: #22d3ee;
}

#ReplyFormBox.reply-form-locked .reply-toolbar,
#ReplyFormBox.reply-form-locked textarea,
#ReplyFormBox.reply-form-locked button[type="submit"] {
    opacity: 0.65;
}

#ReplyFormBox.reply-form-locked .tb-btn,
#ReplyFormBox.reply-form-locked button[type="submit"] {
    cursor: not-allowed;
}

#ReplyFormBox.reply-form-locked textarea {
    background: var(--bg-tertiary);
}

.topic-stats {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.topic-stat {
    background: rgba(99, 130, 181, 0.16);
    border: none;
    border-radius: 10px;
    min-width: 60px;
    padding: 6px 12px;
    text-align: left;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    justify-content: center;
}

[data-theme="dark"] .topic-stat {
    background: rgba(255, 255, 255, 0.10);
}

.topic-stat svg {
    width: 14px;
    height: 14px;
    color: var(--text-muted);
    opacity: 0.9;
}

.topic-stat-number {
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}

.topic-stat-label {
    color: var(--text-muted);
    font-size: 12px;
    line-height: 1.2;
    margin-top: 0;
}

/* 两个 pill 横向排列 */
.topic-stats-cell {
    flex-direction: row !important;
    align-items: center;
    gap: 5px;
}

/* 合并阅读+回复为单胶囊 pill */
/* 两个独立固定宽度的统计 pill（阅读 / 回复） */
.topic-stat-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 62px;
    padding: 4px 0;
    border-radius: 5px;
    white-space: nowrap;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.topic-stat-pill-view {
    background: rgba(99, 130, 181, 0.18);
}

.topic-stat-pill-reply {
    background: rgba(99, 181, 130, 0.18);
}

[data-theme="dark"] .topic-stat-pill-view {
    background: rgba(130, 160, 210, 0.15);
}

[data-theme="dark"] .topic-stat-pill-reply {
    background: rgba(80, 200, 130, 0.15);
}

.topic-stat-pill svg {
    width: 12px;
    height: 12px;
    color: var(--text-muted);
    opacity: 0.85;
    flex-shrink: 0;
}

.topic-stat-pill .topic-stat-number {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

@media screen and (max-width: 768px) {
    .topic-list-item .topic-stats-cell {
        display: none;
    }

    .topic-metrics-inline {
        display: inline-flex;
        gap: 8px;
    }

    .topic-meta-sep {
        display: none;
    }

    .topic-metric svg {
        width: 14px;
        height: 14px;
    }

    .topic-metric {
        background: transparent;
        border: none;
        padding: 0;
        min-width: 0;
        color: var(--text-muted);
    }

    .topic-list-item .topic-time svg {
        width: 14px;
        height: 14px;
    }

    .topic-stats {
        flex-direction: column;
        align-items: flex-end;
        gap: 4px;
    }

    .topic-stat {
        border-radius: 999px;
        min-width: 52px;
        padding: 3px 8px;
        justify-content: center;
    }

    .topic-stat svg {
        width: 12px;
        height: 12px;
    }

    .topic-stat-number {
        font-size: 11px;
    }

    .topic-stat-label {
        font-size: 11px;
        margin-top: 0;
    }
}

/* Rightbar */
#Rightbar {
    float: right;
    width: 270px;
    margin-left: 20px;
    margin-top: 20px;
}

#Main {
    margin-right: 290px;
}

/* VanillaForums-like wider layout */
@media screen and (min-width: 1025px) {
    #Wrapper.vanilla-layout>.content {
        box-sizing: border-box;
        max-width: 1224px;
    }

    /* Reduce gap between main and right card */
    #Wrapper.vanilla-layout #Rightbar {
        margin-left: 12px;
    }

    #Wrapper.vanilla-layout #Main {
        margin-right: 282px;
    }

    #Top.vanilla-layout {
        padding-left: 0;
        padding-right: 0;
    }

    #Top.vanilla-layout .header-boards {
        column-gap: 12px;
    }

    #Top.vanilla-layout .content {
        box-sizing: border-box;
        max-width: 1224px;
        padding-left: 18px;
        padding-right: 18px;
    }

    #Bottom.vanilla-layout {
        padding-left: 0;
        padding-right: 0;
    }

    #Bottom.vanilla-layout .content {
        box-sizing: border-box;
        max-width: 1224px;
        padding-left: 18px;
        padding-right: 18px;
    }
}

/* ============================================
   User Card Styles (Rightbar)
   ============================================ */
.user-card {
    margin-bottom: 15px;
}

/* 未登录欢迎区域 */
.user-card-welcome {
    text-align: center;
    padding: 20px 15px !important;
}

.welcome-title {
    font-size: 20px;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.welcome-desc {
    font-size: 13px;
    color: var(--text-muted);
}

/* 已登录用户头部 */
.user-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px !important;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    box-sizing: border-box;
}

.user-avatar {
    width: var(--avatar-size);
    height: var(--avatar-size);
    border-radius: 50%;
    flex-shrink: 0;
    display: block;
    box-sizing: border-box;
}

.user-avatar a {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

.user-info {
    flex: 1;
}

.user-name a {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.user-name a:hover {
    text-decoration: none;
}

.user-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 3px;
}

.user-notif {
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.2;
}

.user-notif-right {
    margin-top: 0;
}

.user-notif-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 13px;
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.user-notif-badge:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
}

.user-notif-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.user-notif-icon svg {
    display: block;
    width: 16px;
    height: 16px;
}

.user-notif-label {
    font-size: 13px;
}

.user-notif-count {
    font-weight: 700;
    font-size: 13px;
}

.user-notif-count.has-unread {
    color: #ef4444;
}

.user-notif-badge:has(.has-unread) {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.08);
}

.user-logout-link {
    font-size: 12px;
    color: var(--text-muted);
    text-decoration: none;
    padding: 4px 6px;
    border-radius: 4px;
    white-space: nowrap;
}

.user-logout-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    text-decoration: none;
}

/* 操作按钮区域 */
.user-card-actions {
    display: flex;
    gap: 10px;
    padding: 12px 15px !important;
    background: var(--bg-tertiary);
}

.user-action-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    height: 34px;
    padding: 7px 14px;
    gap: 6px;
    text-align: center;
    font-size: 13px;
    line-height: 1.2;
    border-radius: 999px;
    text-decoration: none;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.user-action-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
    text-decoration: none;
}

.user-action-btn.primary {
    --user-action-primary-bg: #334155;
    --user-action-primary-bg-hover: #1f2937;

    position: relative;
    z-index: 0;
    background: transparent;
    border-color: transparent;
    color: #ffffff;
    font-weight: 600;
}

.user-action-btn.primary:hover {
    --user-action-primary-bg: var(--user-action-primary-bg-hover);
}

[data-theme="dark"] .user-action-btn.primary {
    color: #ffffff;
}

[data-theme="dark"] .user-action-btn.primary:hover {
    --user-action-primary-bg: var(--user-action-primary-bg-hover);
}

.user-action-btn.primary .ai-sparkle {
    color: currentColor;
}

.user-action-btn.primary::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--user-action-primary-bg);
    z-index: -1;
    transition: background-color 0.2s ease;
}

/* Sidebar: V2EX-like "创作新主题" */
.sidebar-create-topic {
    margin-top: 28px;
}

.sidebar-create-topic-cell {
    padding: 0 !important;
}

.sidebar-create-topic-btn {
    appearance: none;
    --create-topic-icon-size: 18px;
    --create-topic-icon-shift: -1px;
    /* optical alignment for this SVG set */

    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 12px;
    box-sizing: border-box;
    border: none;
    border-radius: 0;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    text-align: left;
    text-decoration: none;
}

.sidebar-create-topic-cell:first-child .sidebar-create-topic-btn {
    border-top-left-radius: var(--card-radius);
    border-top-right-radius: var(--card-radius);
}

.sidebar-create-topic-cell:last-child .sidebar-create-topic-btn {
    border-bottom-left-radius: var(--card-radius);
    border-bottom-right-radius: var(--card-radius);
}

.sidebar-create-topic-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    text-decoration: none;
}

.sidebar-create-topic-btn:focus-visible {
    outline: 2px solid rgba(59, 130, 246, 0.75);
    outline-offset: 2px;
}

.sidebar-create-topic-btn .create-topic-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    flex-shrink: 0;
    width: var(--create-topic-icon-size);
    height: var(--create-topic-icon-size);
}

.sidebar-create-topic-btn .create-topic-icon svg {
    width: 100%;
    height: 100%;
    display: block;
    transform: translateY(var(--create-topic-icon-shift));
}

.sidebar-create-topic-btn .create-topic-label {
    font-size: 14px;
    font-weight: 600;
    line-height: var(--create-topic-icon-size);
}

.sidebar-create-topic-btn .create-topic-ai {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    color: #0ea5e9;
    flex-shrink: 0;
}

.sidebar-create-topic-btn .create-topic-ai svg {
    width: 16px;
    height: 16px;
    display: block;
}

[data-theme="dark"] .sidebar-create-topic-btn .create-topic-ai {
    color: #7dd3fc;
}

.sidebar-create-topic .create-dropdown.open .sidebar-create-topic-btn,
.sidebar-create-topic-cell .create-dropdown.open .sidebar-create-topic-btn {
    background: var(--bg-tertiary);
    box-shadow: none;
}

.ai-plus,
.ai-sparkle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
}

.ai-sparkle {
    color: #0ea5e9;
}

.ai-plus svg,
.ai-sparkle svg {
    width: 16px;
    height: 16px;
    display: block;
}

[data-theme="dark"] .ai-sparkle {
    color: #7dd3fc;
}

/* Create Dropdown Button */
.create-dropdown {
    position: relative;
    flex: 1;
}

.create-dropdown-toggle {
    width: 100%;
    cursor: pointer;
}

.create-dropdown-toggle .ai-label {
    flex: 1;
    text-align: center;
}

.create-dropdown-caret {
    opacity: 0.7;
    margin-left: 4px;
    font-size: 12px;
}

.create-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    min-width: 100%;
    padding: 6px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 12px 28px var(--shadow-color);
    z-index: 100;
}

.create-dropdown.open .create-dropdown-menu {
    display: block;
}

.create-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    line-height: 1.2;
    transition: background 0.15s ease;
}

.create-dropdown-item:hover {
    background: var(--bg-tertiary);
    text-decoration: none;
}

.create-dropdown-icon {
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.create-dropdown.open .create-dropdown-toggle {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
}

/* Clearfix for content wrapper */
#Wrapper .content::after {
    content: "";
    display: table;
    clear: both;
}

/* Footer */
#Bottom {
    background-color: var(--bg-secondary);
    padding: 20px;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    clear: both;
    transition: background-color 0.3s ease;
}

#Bottom .footer-main {
    margin-right: 290px;
    /* match #Main margin-right (reserve Rightbar + gap) */
    text-align: left;
}

#Bottom.vanilla-layout .footer-main {
    margin-right: 282px;
    /* match #Wrapper.vanilla-layout #Main margin-right */
}

#Bottom .footer-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

#Bottom .footer-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    flex-wrap: wrap;
}

#Bottom .footer-link {
    color: var(--text-muted);
    text-decoration: none;
}

#Bottom .footer-link:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

#Bottom .footer-tagline {
    margin-top: 4px;
}

/* Floating Scroll Buttons */
.nht-scroll-buttons {
    position: fixed;
    right: 18px;
    bottom: 24px;
    z-index: 950;
    display: flex;
    flex-direction: column;
    gap: 6px;
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
    transition: opacity 0.22s ease, transform 0.22s ease;
}

.nht-scroll-buttons.is-active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.nht-scroll-button {
    width: 36px;
    height: 36px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: 1px solid var(--scroll-fab-border);
    background: linear-gradient(180deg, var(--scroll-fab-surface), var(--scroll-fab-bg));
    color: var(--scroll-fab-icon);
    box-shadow: 0 10px 20px -16px var(--scroll-fab-shadow), 0 2px 6px rgba(0, 0, 0, 0.08);
    transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, color 0.18s ease;
}

.nht-scroll-button:hover {
    background: linear-gradient(180deg, var(--scroll-fab-surface), var(--scroll-fab-bg-hover));
    color: var(--text-primary);
    box-shadow: 0 12px 22px -16px var(--scroll-fab-shadow), 0 4px 8px rgba(0, 0, 0, 0.10);
    transform: translateY(-1px);
}

.nht-scroll-button:active {
    transform: translateY(1px);
}

.nht-scroll-button:focus-visible {
    outline: none;
    border-color: rgba(8, 145, 178, 0.34);
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.14), 0 12px 24px -14px var(--scroll-fab-shadow);
}

.nht-scroll-button svg {
    width: 16px;
    height: 16px;
    display: block;
}

/* ============================================
   Navigation Bar Styles (V2EX-like simple style)
   ============================================ */
.nav-bar {
    background-color: var(--bg-secondary);
    border-radius: var(--card-radius);
    box-shadow: 0 2px 3px var(--shadow-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0;
    transition: background-color 0.3s ease;
}

.box #nav-placeholder>.nav-bar {
    border-radius: 0;
    box-shadow: none;
    background-color: transparent;
}

.box #nav-placeholder>.nav-bar .content {
    max-width: none;
    min-width: 0;
    margin: 0;
}

.nav-bar .content {
    display: flex;
    flex-direction: column;
    min-width: auto;
    padding: 0 10px;
}

/* 第一栏：板块导航 - 简洁文本链接风格 */
.nav-primary {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    padding: 8px 0;
    font-size: 14px;
}

/* Desktop: primary boards moved to header */
@media screen and (min-width: 769px) {
    .nav-primary {
        display: none;
    }
}

.nav-board-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 999px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    margin-right: 4px;
    line-height: 1.2;
    min-height: 30px;
    transition: all 0.15s ease;
}

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

.nav-board-item.active {
    background: rgba(14, 165, 233, 0.12);
    border-color: rgba(14, 165, 233, 0.45);
    color: #0c4a6e;
}

[data-theme="dark"] .nav-board-item.active {
    background: rgba(14, 165, 233, 0.2);
    border-color: rgba(14, 165, 233, 0.55);
    color: #bae6fd;
}

/* 第二栏：标签下拉区域 */
.nav-secondary {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
}

.nav-secondary.show {
    max-height: 200px;
    padding: 8px 0;
    overflow: visible;
}

.nav-secondary-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.nav-filters {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

/* ── 分页（chip 下拉式） ── */
.nav-pagination {
    margin-left: auto;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    font-size: 13px;
    user-select: none;
}

.nav-pagination:empty {
    display: none;
}

.nav-pagination-desktop {
    display: flex;
    align-items: center;
    gap: 2px;
}

.nav-pagination-mobile {
    display: none;
    align-items: center;
    gap: 8px;
}

.nav-page-item {
    min-width: 0;
    height: 22px;
    padding: 0 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
    cursor: pointer;
    color: #666;
    transition: all 0.15s ease;
    text-decoration: none;
    border: 1px solid transparent;
    background: transparent;
    line-height: 1;
}

.nav-page-item:hover:not(.active):not(.disabled) {
    background: #e8e8e8;
    color: #333;
    text-decoration: none;
}

.nav-page-item.active {
    background: #fff;
    color: #333;
    border: 1px solid #ddd;
    font-weight: 500;
    cursor: default;
}

.nav-page-item.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

.nav-page-item.nav-page-arrow {
    font-size: 12px;
    color: #999;
}

.nav-page-item.nav-page-arrow:hover:not(.disabled) {
    color: #333;
}

.nav-page-ellipsis {
    color: #999;
    padding: 0 4px;
    font-size: 13px;
}

.nav-page-dropdown-item.dots {
    cursor: default;
    color: var(--text-muted);
}

[data-theme="dark"] .nav-page-item {
    color: #9ca3af;
}

[data-theme="dark"] .nav-page-item:hover:not(.active):not(.disabled) {
    background: #2f2f2f;
    color: #e5e7eb;
}

[data-theme="dark"] .nav-page-item.active {
    background: #242424;
    border-color: #3d3d3d;
    color: #e5e7eb;
}

[data-theme="dark"] .nav-page-item.nav-page-arrow {
    color: #7b7b7b;
}

[data-theme="dark"] .nav-page-item.nav-page-arrow:hover:not(.disabled) {
    color: #e5e7eb;
}

[data-theme="dark"] .nav-page-ellipsis {
    color: #777;
}

.nav-pagination-dropdown {
    position: relative;
}

.nav-pagination-menu {
    min-width: 180px;
    max-width: min(260px, calc(100vw - 24px));
    right: 0;
    left: auto;
}

.nav-pagination-jump {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color);
    margin: -6px -6px 6px;
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 1;
}

.nav-pagination-jump-input {
    flex: 1;
    min-width: 0;
    height: 32px;
    padding: 0 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    -moz-appearance: textfield;
}

.nav-pagination-jump-input::-webkit-inner-spin-button,
.nav-pagination-jump-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.nav-pagination-jump-input:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
    background: var(--bg-secondary);
}

.nav-pagination-jump-input.error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.18);
}

.nav-pagination-jump-btn {
    flex-shrink: 0;
    height: 32px;
    padding: 0 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
}

.nav-pagination-jump-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--text-muted);
}

.nav-pagination-page-list {
    max-height: 200px;
    overflow-y: auto;
}

.nav-page-dropdown-item.active {
    background: var(--bg-tertiary);
    font-weight: 600;
}

/* ── New-topics banner (Discourse-style live update) ── */
.new-topics-banner {
    text-align: center;
    padding: 8px 0;
    background: var(--bg-alt, var(--bg));
    border-bottom: 1px solid var(--border);
}

.new-topics-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 18px;
    border: none;
    border-radius: 20px;
    background: var(--link-color, #4285f4);
    color: #fff;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
    line-height: 1.4;
}

.new-topics-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.new-topics-btn:active {
    transform: translateY(0);
}

.new-topics-icon {
    font-size: 14px;
    line-height: 1;
}

/* Expand wrapper animation */
.new-topics-expand-wrapper {
    will-change: max-height, opacity;
}

/* Highlight flash for newly inserted topics */
.topic-new-highlight {
    animation: newTopicFlash 2.5s ease;
}

@keyframes newTopicFlash {
    0% {
        background-color: rgba(66, 133, 244, 0.12);
    }

    100% {
        background-color: transparent;
    }
}

.topic-pagination-row {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 8px 12px;
    border-top: 1px solid var(--border-color);
}

.topic-pagination-row .nav-pagination {
    margin-left: 0;
}

@media screen and (max-width: 768px) {

    /* ── 移动端筛选 + 分页：同一行，分页靠右 ── */
    .nav-secondary-row {
        flex-direction: row;
        flex-wrap: nowrap;
        align-items: center;
        gap: 8px;
    }

    .nav-filters {
        flex: 1;
        min-width: 0;
        flex-wrap: nowrap;
        overflow: visible;
        gap: 8px;
        padding-bottom: 0;
    }

    .nav-filter-chip {
        padding: 5px 10px;
        font-size: 12px;
        min-height: 28px;
        white-space: nowrap;
        flex-shrink: 1;
        min-width: 0;
    }

    .nav-filter-chip-value {
        max-width: 90px;
    }

    .nav-secondary-row .nav-pagination {
        flex-shrink: 0;
        margin-left: auto;
        padding: 0;
        border-top: none;
        width: auto;
    }

    .nav-secondary-row .nav-pagination:empty {
        display: none;
    }

    .nav-pagination-desktop {
        display: none;
    }

    .nav-pagination-mobile {
        display: flex;
        justify-content: flex-end;
        flex-wrap: nowrap;
    }

    .nav-pagination-mobile .nav-filter-chip {
        min-width: 0;
    }
}

.nav-dropdown {
    position: relative;
}

.nav-filter-chip {
    appearance: none;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    color: var(--text-secondary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 0;
    min-width: 0;
    padding: 6px 12px;
    font-size: 13px;
    line-height: 1.2;
}

.nav-filter-chip:hover {
    border-color: var(--text-muted);
    color: var(--text-primary);
    text-decoration: none;
}

.nav-dropdown.open .nav-filter-chip {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
    color: var(--text-primary);
}

.nav-filter-chip-label {
    font-weight: 600;
}

.nav-filter-chip-icon {
    font-size: 13px;
    line-height: 1;
    flex-shrink: 0;
}

.board-icon-img {
    width: 14px;
    height: 14px;
    object-fit: contain;
    vertical-align: middle;
    display: inline-block;
}

.nav-filter-chip-clear {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 999px;
    color: var(--text-muted);
    margin-left: 2px;
    cursor: pointer;
}

.nav-filter-chip-clear:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-filter-chip-value {
    font-weight: 600;
    display: inline-block;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-filter-chip-caret {
    opacity: 0.7;
    margin-left: 2px;
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 220px;
    max-width: min(360px, calc(100vw - 24px));
    max-height: min(240px, 70vh);
    overflow: auto;
    padding: 6px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 12px 28px var(--shadow-color);
    z-index: 50;
}

.nav-pagination-dropdown .nav-pagination-menu {
    left: auto;
    right: 0;
}

.nav-dropdown-search {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--bg-secondary);
    padding: 10px;
    margin: -6px -6px 6px;
    border-bottom: 1px solid var(--border-color);
}

.nav-dropdown-search-field {
    position: relative;
}

.nav-dropdown-search-input {
    width: 100%;
    box-sizing: border-box;
    padding: 10px 38px 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

.nav-dropdown-search-input:focus {
    background: var(--bg-secondary);
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
}

.nav-dropdown-search-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    color: var(--text-muted);
    pointer-events: none;
}

.nav-dropdown-search-icon svg {
    width: 18px;
    height: 18px;
}

.nav-dropdown.open .nav-dropdown-menu {
    display: block;
}

.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 10px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    line-height: 1.2;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
}

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

.nav-dropdown-item.active {
    /* no extra styling — selection is already visible in the chip */
}

.nav-dropdown-item-icon {
    width: 18px;
    text-align: center;
    flex-shrink: 0;
    opacity: 0.85;
}

.nav-dropdown-empty {
    padding: 8px 10px;
    color: var(--text-muted);
    font-size: 13px;
}

.nav-breadcrumb {
    display: inline-flex;
    align-items: center;
    font-size: 15px;
    line-height: 1.2;
    color: var(--text-muted);
    white-space: nowrap;
}

.nav-breadcrumb .nav-home {
    color: var(--text-secondary);
    font-weight: 600;
}

.nav-breadcrumb .nav-board-current {
    color: var(--text-primary);
    font-weight: 600;
}

.nav-tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

/* Keep secondary nav height consistent on desktop even when a board has no tags (e.g., 全部) */
@media screen and (min-width: 769px) {
    .nav-tags-container {
        min-height: 26px;
    }
}

.nav-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    color: var(--text-secondary);
    font-size: 12px;
    text-decoration: none;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    line-height: 1.2;
    transition: all 0.15s ease;
}

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

.nav-tag.active {
    background: rgba(14, 165, 233, 0.12);
    border-color: rgba(14, 165, 233, 0.45);
    color: #0c4a6e;
    font-weight: 600;
}

[data-theme="dark"] .nav-tag.active {
    background: rgba(14, 165, 233, 0.2);
    border-color: rgba(14, 165, 233, 0.55);
    color: #bae6fd;
}

/* Theme Toggle Button */
/* Theme Toggle Button */
.theme-toggle {
    background: transparent;
    border: none;
    font-size: 18px;
    cursor: pointer;
    padding: 6px 10px;
    margin-left: 5px;
    border-radius: 4px;
    color: var(--text-secondary);
    transition: background-color 0.2s ease, color 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.header-boards-secondary .theme-toggle {
    margin-left: 0;
}

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

.theme-option {
    padding: 8px 15px;
    font-size: 14px;
}

/* Editor Toolbar Styles */
.editor-toolbar,
.reply-toolbar,
.edit-toolbar,
.reply-edit-toolbar {
    background-color: var(--bg-tertiary) !important;
    border-color: var(--border-color) !important;
}

.editor-toolbar button,
.reply-toolbar button,
.edit-toolbar button,
.reply-edit-toolbar button,
.tb-btn {
    background-color: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-color) !important;
}

.editor-toolbar button:hover,
.reply-toolbar button:hover,
.edit-toolbar button:hover,
.reply-edit-toolbar button:hover,
.tb-btn:hover {
    background-color: var(--bg-tertiary) !important;
}

/* Input Panels Dark Mode */
.input-panel {
    background-color: var(--bg-tertiary) !important;
    border-color: var(--border-color) !important;
}

/* ============================================
   RESPONSIVE DESIGN - Mobile Support
   ============================================ */

/* Tablet and smaller */
@media screen and (max-width: 1024px) {
    .content {
        min-width: auto;
        max-width: 100%;
        padding: 0 10px;
    }

    .header-boards {
        grid-template-columns: 1fr auto;
    }

    #Rightbar {
        float: none;
        width: 100%;
        margin-left: 0;
        margin-top: 20px;
    }

    #Main {
        margin-right: 0;
    }

    #Bottom .footer-main,
    #Bottom.vanilla-layout .footer-main {
        margin-right: 0;
    }

    .nht-scroll-buttons {
        right: 14px;
        bottom: 18px;
    }
}

/* Mobile phones */
@media screen and (max-width: 768px) {
    body {
        font-size: 15px;
    }

    :root {
        --avatar-size: 42px;
    }

    #Top {
        height: 44px;
        padding: 0 12px;
        flex-wrap: nowrap;
    }

    #Top .content {
        flex-direction: row;
        flex-wrap: nowrap;
        gap: 10px;
    }

    .header-left {
        flex-shrink: 0;
        margin-left: 6px;
    }

    .logo {
        font-size: 32px;
    }

    .logo-n .ai-star {
        -webkit-filter: none;
        filter: none;
    }

    .logo-subtitle {
        display: none;
    }

    .header-boards {
        display: none;
    }

    .header-more {
        display: none;
    }

    .header-search {
        flex: 1;
        min-width: 0;
        max-width: none;
        justify-content: flex-start;
    }

    .search-input {
        padding: 6px 12px;
        font-size: 13px;
    }

    #searchInput {
        float: none;
        width: 100% !important;
        font-size: 16px;
    }

    #searchInput:focus {
        width: 100% !important;
    }

    /* Hide desktop nav, show mobile menu button */
    .header-nav {
        display: none !important;
    }

    #TopNav {
        display: none !important;
    }

    .mobile-menu-btn {
        display: block !important;
        flex-shrink: 0;
    }

    .nav-bar {
        border-radius: 0;
    }

    /* Mobile: hide primary nav (replaced by dropdown filters) */
    .nav-primary {
        display: none;
    }

    .nav-board-item {
        flex: 0 0 auto;
        margin-right: 0;
        padding: 7px 14px;
        border-radius: 999px;
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        white-space: nowrap;
    }

    .nav-board-item.active {
        background: rgba(14, 165, 233, 0.2);
        border-color: rgba(14, 165, 233, 0.55);
        color: #bae6fd;
    }

    .nav-secondary.show {
        padding: 10px 0;
        border-top: none;
    }

    .nav-filter-chip {
        padding: 5px 10px;
        border-radius: 999px;
        font-size: 12px;
        min-height: 28px;
    }

    .nav-dropdown-search-input {
        font-size: 16px;
    }

    /* Hide sidebar on mobile */
    #Rightbar {
        display: none;
    }

    #TopNav a {
        padding: 5px 10px;
    }

    .content {
        padding: 0;
        min-width: auto;
    }

    .box {
        border-radius: 0;
        margin-bottom: 10px;
    }

    .cell {
        padding: 12px;
    }

    .header {
        padding: 12px;
    }

    input[type="text"],
    input[type="password"],
    input[type="email"],
    input[type="number"],
    input[type="search"],
    textarea {
        width: 100%;
        box-sizing: border-box;
        /* Prevent iOS Safari zoom (looks like page "jitter") on focus. */
        font-size: 16px;
    }

    /* Topic list: mobile adjustments */
    .topic-list-item .topic-stats-cell {
        display: none;
    }

    /* Auth/form tables: stack label on top of input for clean mobile alignment. */
    #loginForm table,
    #registerForm table,
    #resetRequestForm table,
    #resetConfirmForm table,
    #loginForm tbody,
    #registerForm tbody,
    #resetRequestForm tbody,
    #resetConfirmForm tbody,
    #loginForm tr,
    #registerForm tr,
    #resetRequestForm tr,
    #resetConfirmForm tr,
    #loginForm td,
    #registerForm td,
    #resetRequestForm td,
    #resetConfirmForm td {
        display: block;
        width: 100% !important;
    }

    #loginForm td:first-child,
    #registerForm td:first-child,
    #resetRequestForm td:first-child,
    #resetConfirmForm td:first-child {
        padding: 0 0 6px;
        white-space: nowrap;
        text-align: left;
    }

    #loginForm td:first-child:empty,
    #registerForm td:first-child:empty,
    #resetRequestForm td:first-child:empty,
    #resetConfirmForm td:first-child:empty {
        display: none;
    }

    #loginForm td:last-child,
    #registerForm td:last-child,
    #resetRequestForm td:last-child,
    #resetConfirmForm td:last-child {
        padding: 0 0 12px;
    }

    #loginForm button[type="submit"],
    #registerForm button[type="submit"],
    #resetRequestForm button[type="submit"],
    #resetConfirmForm button[type="submit"] {
        width: 100%;
    }

    .item_title {
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .topic_meta {
        font-size: 11px;
    }

    .topic-list-item .topic_meta {
        gap: 5px;
    }

    /* Editor toolbar responsive */
    .editor-toolbar,
    .reply-toolbar,
    .edit-toolbar {
        flex-wrap: wrap;
        gap: 5px;
    }

    /* Reply form */
    #Rightbar .box .cell {
        padding: 10px;
    }
}

/* Small mobile phones */
@media screen and (max-width: 480px) {
    .logo {
        font-size: 32px;
    }

    #TopNav {
        font-size: 13px;
    }

    .item_title {
        font-size: 14px;
    }

    .sep20 {
        height: 10px;
    }

    /* Stack footer links vertically */
    #Bottom .inner {
        line-height: 2;
    }

    #Bottom .footer-line {
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        gap: 6px;
    }

    #Bottom .footer-links {
        justify-content: flex-start;
        gap: 12px;
    }

    /* 导航移动端适配 */
    .nav-board-item {
        padding: 5px 10px;
        font-size: 12px;
        border-radius: 999px;
    }

    .nav-tag {
        font-size: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {

    .nht-scroll-buttons,
    .nht-scroll-button {
        transition: none;
    }
}

/* Feedback: Toast + Message Bar */
.toast {
    position: fixed;
    right: 20px;
    bottom: 20px;
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 13px;
    z-index: 10000;
    max-width: min(520px, calc(100vw - 40px));
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background: rgba(22, 163, 74, 0.95);
}

.toast.error {
    background: rgba(239, 68, 68, 0.95);
}

.toast.warning {
    background: rgba(245, 158, 11, 0.95);
}

.toast.info {
    background: rgba(0, 0, 0, 0.85);
}

@media screen and (max-width: 768px) {
    .toast {
        left: 12px;
        right: 12px;
        bottom: 12px;
        max-width: none;
        text-align: center;
    }
}

.message-bar {
    padding: 12px 15px;
    margin-bottom: 15px;
    border-radius: 3px;
    font-size: 14px;
    display: none;
    align-items: center;
    gap: 8px;
}

.message-bar.show {
    display: flex;
}

.message-bar.error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

[data-theme="dark"] .message-bar.error {
    background: #3a2020;
    border-color: #5c2626;
    color: #fca5a5;
}

.message-bar.success {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
}

[data-theme="dark"] .message-bar.success {
    background: #1a3a20;
    border-color: #265c36;
    color: #86efac;
}

.message-bar.warning {
    background: #fffbeb;
    border: 1px solid #fde68a;
    color: #92400e;
}

[data-theme="dark"] .message-bar.warning {
    background: #3a2f1a;
    border-color: #5c4a26;
    color: #fcd34d;
}

.message-bar.info {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1e40af;
}

[data-theme="dark"] .message-bar.info {
    background: #1e2a3a;
    border-color: #2b4b6b;
    color: #93c5fd;
}

.message-bar-icon {
    font-size: 16px;
    flex-shrink: 0;
}

.message-bar-text {
    flex: 1;
}

.markdown-fallback {
    white-space: pre-wrap;
    word-break: break-word;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   NHT Inspection Card - Professional Style
   ============================================ */

.nht-inspection {
    margin: 16px 0;
}

.nht-inspection-loading,
.nht-inspection-error {
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-tertiary);
    font-size: 13px;
    line-height: 1.55;
}

.nht-inspection-loading {
    color: var(--text-secondary);
}

.nht-inspection-error {
    color: #b91c1c;
    border-color: rgba(185, 28, 28, 0.28);
    background: rgba(185, 28, 28, 0.06);
}

[data-theme="dark"] .nht-inspection-error {
    color: #fca5a5;
    border-color: rgba(252, 165, 165, 0.22);
    background: rgba(252, 165, 165, 0.08);
}

/* Main Card Container */
.nht-inspection-card {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-secondary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] .nht-inspection-card {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Header Section - Score Display */
.nht-inspection-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: #fff;
}

[data-theme="dark"] .nht-inspection-head {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.nht-inspection-head-left {
    flex: 1;
    min-width: 0;
}

.nht-inspection-title {
    font-weight: 700;
    font-size: 15px;
    line-height: 1.3;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nht-inspection-title::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #3b82f6, #60a5fa);
    border-radius: 5px;
    flex-shrink: 0;
}

.nht-inspection-sub {
    margin-top: 4px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.4;
}

/* Score Display */
.nht-inspection-head-right {
    flex-shrink: 0;
    text-align: right;
}

.nht-inspection-score {
    min-width: 100px;
}

.nht-inspection-score-line {
    display: flex;
    align-items: baseline;
    justify-content: flex-end;
    gap: 10px;
}

.nht-inspection-score-num {
    font-weight: 800;
    font-size: 32px;
    line-height: 1;
    letter-spacing: -0.02em;
    color: #fff;
    font-variant-numeric: tabular-nums;
}

.nht-inspection-score-grade {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    line-height: 1;
}

/* Grade-specific colors */
.nht-inspection-score-grade[data-grade="S"] {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    border-color: rgba(245, 158, 11, 0.5);
}

.nht-inspection-score-grade[data-grade="A+"],
.nht-inspection-score-grade[data-grade="A"] {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    border-color: rgba(139, 92, 246, 0.5);
}

.nht-inspection-score-grade[data-grade="B+"],
.nht-inspection-score-grade[data-grade="B"] {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    border-color: rgba(59, 130, 246, 0.5);
}

.nht-inspection-score-grade[data-grade="C+"],
.nht-inspection-score-grade[data-grade="C"] {
    background: linear-gradient(135deg, #10b981, #059669);
    border-color: rgba(16, 185, 129, 0.5);
}

.nht-inspection-score-grade[data-grade="D"],
.nht-inspection-score-grade[data-grade="E"] {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    border-color: rgba(239, 68, 68, 0.5);
}

.nht-inspection-score-label {
    margin-top: 4px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Meta Information Grid - Card Style */
.nht-inspection-meta {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    padding: 0;
    background: var(--border-color);
}

@media (max-width: 640px) {
    .nht-inspection-meta {
        grid-template-columns: repeat(2, 1fr);
    }
}

.nht-meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 14px;
    background: var(--bg-secondary);
    min-width: 0;
}

.nht-meta-icon {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
}

.nht-meta-icon svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    flex-shrink: 0;
}

.nht-meta-k {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    font-weight: 600;
}

.nht-meta-v {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 0;
    word-break: break-word;
    line-height: 1.35;
}

.nht-meta-v-sub {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 500;
}

/* Badges Section */
.nht-inspection-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
}

.nht-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.2;
    font-weight: 600;
}

.nht-badge-icon {
    width: 12px;
    height: 12px;
    flex-shrink: 0;
}

.nht-badge.ok {
    border-color: rgba(16, 185, 129, 0.3);
    background: rgba(16, 185, 129, 0.08);
    color: #059669;
}

[data-theme="dark"] .nht-badge.ok {
    color: #34d399;
    border-color: rgba(52, 211, 153, 0.25);
    background: rgba(16, 185, 129, 0.12);
}

.nht-badge.bad {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.08);
    color: #dc2626;
}

[data-theme="dark"] .nht-badge.bad {
    color: #f87171;
    border-color: rgba(248, 113, 113, 0.25);
    background: rgba(239, 68, 68, 0.12);
}

.nht-badge.neutral {
    border-color: rgba(59, 130, 246, 0.25);
    background: rgba(59, 130, 246, 0.08);
    color: #2563eb;
}

[data-theme="dark"] .nht-badge.neutral {
    color: #60a5fa;
    border-color: rgba(96, 165, 250, 0.25);
    background: rgba(59, 130, 246, 0.12);
}

/* Charts Section - 2x2 Grid */
.nht-inspection-charts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--border-color);
    border-top: 1px solid var(--border-color);
}

@media (max-width: 640px) {
    .nht-inspection-charts {
        grid-template-columns: 1fr;
    }
}

.nht-chart {
    background: var(--bg-secondary);
    padding: 14px 16px;
}

.nht-chart-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.nht-chart-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.nht-chart-unit {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
}

.nht-chart-axis {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
    font-size: 10px;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

.nht-axis-tick {
    flex: 1 1 auto;
    text-align: center;
}

.nht-axis-tick:first-child {
    text-align: left;
}

.nht-axis-tick:last-child {
    text-align: right;
}

.nht-chart-bars {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nht-bar-row {
    display: grid;
    grid-template-columns: 50px 1fr 70px;
    align-items: center;
    gap: 10px;
}

.nht-bar-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.nht-bar-track {
    height: 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    overflow: hidden;
    position: relative;
}

.nht-bar-fill {
    height: 100%;
    border-radius: 4px;
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    width: 0%;
    transition: width 0.4s ease;
}

[data-theme="dark"] .nht-bar-fill {
    background: linear-gradient(90deg, #2563eb, #3b82f6);
}

.nht-bar-value {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    text-align: right;
}

/* Traceroute Section */
.nht-traceroute-section {
    border-top: 1px solid var(--border-color);
    padding: 14px 16px;
}

.nht-traceroute-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.nht-traceroute-header svg {
    width: 16px;
    height: 16px;
    stroke: var(--text-muted);
    stroke-width: 2;
    fill: none;
}

.nht-traceroute-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nht-traceroute-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-tertiary);
    overflow: hidden;
}

.nht-traceroute-summary {
    display: grid;
    grid-template-columns: 1fr auto auto auto;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    cursor: pointer;
    transition: background 0.15s ease;
}

.nht-traceroute-summary:hover {
    background: var(--bg-hover);
}

.nht-traceroute-target {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nht-traceroute-host {
    font-size: 11px;
    color: var(--text-muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.nht-traceroute-aspath {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 6px;
    line-height: 1.2;
}

.nht-traceroute-aspath code {
    display: inline-flex;
    align-items: center;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 11px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    white-space: nowrap;
}

.nht-traceroute-hops {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.nht-traceroute-rtt {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    min-width: 65px;
    text-align: right;
}

.nht-traceroute-status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    font-size: 11px;
}

.nht-traceroute-status.ok {
    background: rgba(16, 185, 129, 0.15);
    color: #059669;
}

[data-theme="dark"] .nht-traceroute-status.ok {
    color: #34d399;
}

.nht-traceroute-status.fail {
    background: rgba(239, 68, 68, 0.15);
    color: #dc2626;
}

[data-theme="dark"] .nht-traceroute-status.fail {
    color: #f87171;
}

.nht-traceroute-expand {
    color: var(--text-muted);
    transition: transform 0.2s ease;
}

.nht-traceroute-item.expanded .nht-traceroute-expand {
    transform: rotate(90deg);
}

/* Traceroute Hops Detail */
.nht-traceroute-hops-detail {
    display: none;
    border-top: 1px solid var(--border-color);
    padding: 10px 14px;
    background: var(--bg-secondary);
}

.nht-traceroute-item.expanded .nht-traceroute-hops-detail {
    display: block;
}

.nht-hop-row {
    display: grid;
    grid-template-columns: 28px 1fr 160px 70px;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
    font-size: 11px;
    border-bottom: 1px dashed var(--border-color);
}

.nht-hop-row:last-child {
    border-bottom: none;
}

.nht-hop-ttl {
    color: var(--text-muted);
    font-weight: 600;
    text-align: center;
}

.nht-hop-ip {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    color: var(--text-primary);
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nht-hop-ip.timeout {
    color: var(--text-muted);
}

.nht-hop-as {
    font-size: 10px;
    color: var(--text-muted);
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nht-hop-rtt {
    font-weight: 600;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

/* Footer Section */
.nht-inspection-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg-tertiary);
}

.nht-inspection-footer-left a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    border-radius: 6px;
    background: #3b82f6;
    color: #fff;
    font-weight: 600;
    font-size: 12px;
    text-decoration: none;
    transition: background 0.15s ease;
}

.nht-inspection-footer-left a:hover {
    background: #2563eb;
    text-decoration: none;
}

.nht-inspection-footer-right {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 11px;
    opacity: 0.7;
}

/* ============================================================
   === Markdown Components (共用：create_topic / topic / profile / messages)
   ============================================================ */

/* ---- Toolbar ---- */
.md-toolbar {
    --md-accent: #0891b2;
    --md-icon-size: 16px;
    --md-icon-stroke: 2;
    --md-tooltip-bg: #111827;
    --md-tooltip-text: #f9fafb;

    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2px;
    padding: 6px 8px;
    border: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: 12px 12px 0 0;
}

[data-theme="dark"] .md-toolbar {
    --md-tooltip-bg: #e2e8f0;
    --md-tooltip-text: #0f172a;
}

.md-toolbar .md-separator {
    width: 1px;
    height: 16px;
    background: var(--border-color);
    margin: 0 2px;
}

.md-toolbar .md-btn {
    --md-icon-scale: 1;
    --md-icon-y: 0px;

    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    box-sizing: border-box;
    appearance: none;
    -webkit-appearance: none;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    line-height: 1;
    font-weight: 600;
    position: relative;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
    user-select: none;
}

.md-toolbar .md-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.md-toolbar .md-btn:active {
    transform: translateY(1px);
}

.md-toolbar .md-btn:focus-visible {
    outline: none;
    border-color: rgba(8, 145, 178, 0.45);
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.18);
}

.md-toolbar .md-btn svg {
    width: var(--md-icon-size);
    height: var(--md-icon-size);
    display: block;
    stroke: currentColor;
    stroke-width: var(--md-icon-stroke);
    stroke-linecap: round;
    stroke-linejoin: round;
    flex-shrink: 0;
    transform: translateY(var(--md-icon-y)) scale(var(--md-icon-scale));
    transform-origin: center;
}

.md-toolbar .md-btn svg * {
    vector-effect: non-scaling-stroke;
}

.md-toolbar .md-btn::after {
    content: attr(aria-label);
    position: absolute;
    left: 50%;
    top: calc(100% + 8px);
    transform: translateX(-50%) translateY(-4px);
    padding: 4px 8px;
    border-radius: 6px;
    background: var(--md-tooltip-bg);
    color: var(--md-tooltip-text);
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.16);
    transition: opacity 0.15s ease, transform 0.15s ease;
    z-index: 5;
}

.md-toolbar .md-btn::before {
    content: "";
    position: absolute;
    left: 50%;
    top: calc(100% + 3px);
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-bottom-color: var(--md-tooltip-bg);
    opacity: 0;
    transition: opacity 0.15s ease;
}

.md-toolbar .md-btn:hover::after,
.md-toolbar .md-btn:hover::before,
.md-toolbar .md-btn:focus-visible::after,
.md-toolbar .md-btn:focus-visible::before {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.md-toolbar .md-btn .md-btn-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: var(--md-icon-size);
    height: var(--md-icon-size);
    font-weight: 800;
    font-size: 16px;
    line-height: 1;
    letter-spacing: 0.3px;
    transform: translateY(-0.5px);
}

.md-toolbar .md-btn.wide {
    width: auto;
    padding: 0 8px;
    gap: 4px;
}

.md-toolbar .md-btn.wide .md-btn-text {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1px;
}

.md-toolbar .md-btn.wide.active {
    background: rgba(8, 145, 178, 0.12);
    border-color: rgba(8, 145, 178, 0.22);
    color: var(--text-primary);
}

/* ---- Shared Markdown Composer Surfaces ---- */
.md-composer,
.dm-composer {
    position: relative;
}

.md-composer .preview-box,
.dm-composer .preview-box {
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 12px 12px;
    min-height: 0;
}

.md-composer .input-panel,
.dm-composer .input-panel {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    margin: 10px 0;
}

.md-composer .input-panel input,
.dm-composer .input-panel input {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-input);
    color: var(--text-primary);
}

.md-composer .input-panel button,
.dm-composer .input-panel button {
    padding: 8px 16px;
    border-radius: 6px;
}

.md-composer .emoji-picker,
.dm-composer .emoji-picker {
    right: 8px;
    top: 44px;
    border-radius: 10px;
    box-shadow: 0 10px 26px var(--shadow-color);
}

.md-composer .emoji-picker .emoji-item,
.dm-composer .emoji-picker .emoji-item {
    border: none;
    background: transparent;
    font-size: 18px;
    line-height: 1;
    padding: 0;
    color: inherit;
}

.composer-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.composer-actions.composer-actions--start {
    justify-content: flex-start;
}

.composer-actions .topic_meta {
    margin: 0;
}

/* ---- Emoji Picker ---- */
.emoji-picker {
    display: none;
    position: absolute;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 4px 20px var(--shadow-color);
    z-index: 100;
}

.emoji-picker.show {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.emoji-picker .emoji-item {
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: background 0.15s ease;
}

.emoji-picker .emoji-item:hover {
    background: var(--bg-tertiary);
}

.emoji-picker .emoji-item img {
    width: 24px;
    height: 24px;
    display: block;
}

/* ---- Markdown Render Area (preview-box / topic_content / reply_content) ---- */
.preview-box,
.topic_content,
.reply_content {
    --md-accent: #0891b2;
    /* Light mode */
    --md-code-bg: #e8f0fe;
    --md-code-header-bg: #dbe6fd;
    --md-code-border: rgba(15, 23, 42, 0.14);
    --md-code-divider: rgba(15, 23, 42, 0.08);
    --md-code-text: #0f172a;
    --md-code-muted: rgba(15, 23, 42, 0.55);
    --md-code-btn-bg: rgba(15, 23, 42, 0.04);
    --md-code-btn-bg-hover: rgba(15, 23, 42, 0.07);
    --md-code-btn-border: rgba(15, 23, 42, 0.14);
    --md-code-btn-text: #0f172a;

    color: var(--text-primary);
    line-height: 1.75;
}

[data-theme="dark"] .preview-box,
[data-theme="dark"] .topic_content,
[data-theme="dark"] .reply_content {
    /* Dark mode */
    --md-code-bg: #1e1e1e;
    --md-code-header-bg: #252525;
    --md-code-border: rgba(255, 255, 255, 0.10);
    --md-code-divider: rgba(255, 255, 255, 0.07);
    --md-code-text: #d4d4d4;
    --md-code-muted: rgba(212, 212, 212, 0.72);
    --md-code-btn-bg: rgba(255, 255, 255, 0.06);
    --md-code-btn-bg-hover: rgba(255, 255, 255, 0.10);
    --md-code-btn-border: rgba(255, 255, 255, 0.14);
    --md-code-btn-text: #d4d4d4;
}

.preview-box>*:first-child,
.topic_content>*:first-child,
.reply_content>*:first-child {
    margin-top: 0;
}

.preview-box>*:last-child,
.topic_content>*:last-child,
.reply_content>*:last-child {
    margin-bottom: 0;
}

.preview-box p,
.topic_content p,
.reply_content p {
    margin: 0 0 12px;
}

.topic-signature {
    position: relative;
    margin-top: 18px;
    padding-top: 16px;
    color: var(--text-muted);
    font-size: 12px;
    line-height: 1.6;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.topic-signature::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    border-top: 1px dashed var(--border-color);
}

.topic-signature .signature-sign-badge {
    position: absolute;
    top: -8px;
    left: -8px;
    display: inline-flex;
    align-items: center;
    height: 16px;
    padding: 0 8px;
    border-radius: 999px;
    background: var(--bg-secondary);
    color: var(--text-muted);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.14em;
    user-select: none;
    z-index: 1;
}

.topic-signature .signature-body {
    display: block;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.topic-signature .signature-body.is-empty {
    color: var(--text-muted);
    font-style: italic;
}

.preview-box h1,
.preview-box h2,
.preview-box h3,
.topic_content h1,
.topic_content h2,
.topic_content h3,
.reply_content h1,
.reply_content h2,
.reply_content h3 {
    margin: 18px 0 10px;
    line-height: 1.25;
    color: var(--text-primary);
}

.preview-box h1,
.topic_content h1,
.reply_content h1 {
    font-size: 20px;
}

.preview-box h2,
.topic_content h2,
.reply_content h2 {
    font-size: 18px;
}

.preview-box h3,
.topic_content h3,
.reply_content h3 {
    font-size: 16px;
}

.preview-box ul,
.preview-box ol,
.topic_content ul,
.topic_content ol,
.reply_content ul,
.reply_content ol {
    margin: 8px 0 12px;
    padding-left: 1.25em;
}

.preview-box li,
.topic_content li,
.reply_content li {
    margin: 4px 0;
}

/* Blockquote */
.preview-box blockquote,
.topic_content blockquote,
.reply_content blockquote {
    margin: 16px 0;
    padding: 12px 16px;
    border-left: 3px solid rgba(59, 130, 246, 0.55);
    background: var(--md-code-bg);
    border-radius: 0 12px 12px 0;
    color: var(--md-code-text);
}

[data-theme="dark"] .preview-box blockquote,
[data-theme="dark"] .topic_content blockquote,
[data-theme="dark"] .reply_content blockquote {
    border-left-color: rgba(96, 165, 250, 0.55);
}

.preview-box blockquote blockquote,
.topic_content blockquote blockquote,
.reply_content blockquote blockquote {
    margin: 12px 0 0;
    padding: 8px 12px;
    background: var(--md-code-header-bg);
    border-left: 2px solid rgba(59, 130, 246, 0.45);
    border-radius: 0 10px 10px 0;
}

[data-theme="dark"] .preview-box blockquote blockquote,
[data-theme="dark"] .topic_content blockquote blockquote,
[data-theme="dark"] .reply_content blockquote blockquote {
    border-left-color: rgba(96, 165, 250, 0.45);
}

.preview-box blockquote>*:first-child,
.topic_content blockquote>*:first-child,
.reply_content blockquote>*:first-child {
    margin-top: 0;
}

.preview-box blockquote>*:last-child,
.topic_content blockquote>*:last-child,
.reply_content blockquote>*:last-child {
    margin-bottom: 0;
}

/* Inline code */
.preview-box :not(pre)>code,
.topic_content :not(pre)>code,
.reply_content :not(pre)>code {
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.18);
    padding: 2px 6px;
    border-radius: 8px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 13px;
}

[data-theme="dark"] .preview-box :not(pre)>code,
[data-theme="dark"] .topic_content :not(pre)>code,
[data-theme="dark"] .reply_content :not(pre)>code {
    background: rgba(148, 163, 184, 0.12);
    border-color: rgba(148, 163, 184, 0.22);
}

/* Code Block (ChatGPT Style) */
.preview-box .md-codeblock,
.topic_content .md-codeblock,
.reply_content .md-codeblock {
    margin: 16px 0;
    border: none;
    border-radius: 12px;
    overflow: hidden;
    background: var(--md-code-bg);
}

[data-theme="dark"] .preview-box .md-codeblock,
[data-theme="dark"] .topic_content .md-codeblock,
[data-theme="dark"] .reply_content .md-codeblock {
    background: #1e1e1e;
}

.preview-box .md-codeblock-header,
.topic_content .md-codeblock-header,
.reply_content .md-codeblock-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: inherit;
    color: #5d5d5d;
    font-size: 12px;
}

[data-theme="dark"] .preview-box .md-codeblock-header,
[data-theme="dark"] .topic_content .md-codeblock-header,
[data-theme="dark"] .reply_content .md-codeblock-header {
    color: #a0a0a0;
}

.preview-box .md-codeblock-lang,
.topic_content .md-codeblock-lang,
.reply_content .md-codeblock-lang {
    font-variant-numeric: tabular-nums;
    text-transform: lowercase;
    letter-spacing: 0.2px;
}

.preview-box .md-codeblock-actions,
.topic_content .md-codeblock-actions,
.reply_content .md-codeblock-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Copy button */
.preview-box .md-copy-btn,
.topic_content .md-copy-btn,
.reply_content .md-copy-btn {
    border: none;
    background: transparent;
    color: #5d5d5d;
    padding: 4px 8px;
    font-size: 12px;
    font-weight: 400;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    border-radius: 6px;
    transition: color 0.15s ease, background 0.15s ease;
}

[data-theme="dark"] .preview-box .md-copy-btn,
[data-theme="dark"] .topic_content .md-copy-btn,
[data-theme="dark"] .reply_content .md-copy-btn {
    color: #a0a0a0;
}

.preview-box .md-copy-btn:hover,
.topic_content .md-copy-btn:hover,
.reply_content .md-copy-btn:hover {
    color: #0d0d0d;
    background: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .preview-box .md-copy-btn:hover,
[data-theme="dark"] .topic_content .md-copy-btn:hover,
[data-theme="dark"] .reply_content .md-copy-btn:hover {
    color: #e0e0e0;
    background: rgba(255, 255, 255, 0.08);
}

.preview-box .md-copy-btn:active,
.topic_content .md-copy-btn:active,
.reply_content .md-copy-btn:active {
    transform: scale(0.95);
}

.preview-box .md-copy-btn svg,
.topic_content .md-copy-btn svg,
.reply_content .md-copy-btn svg {
    width: 16px;
    height: 16px;
    display: block;
}

.preview-box .md-codeblock pre,
.topic_content .md-codeblock pre,
.reply_content .md-codeblock pre {
    margin: 0;
    padding: 0 16px 16px;
    background: transparent;
    overflow-x: auto;
}

.preview-box .md-codeblock pre code,
.topic_content .md-codeblock pre code,
.reply_content .md-codeblock pre code {
    display: block;
    padding: 0;
    background: transparent;
    color: #0d0d0d;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 14px;
    line-height: 1.5;
}

[data-theme="dark"] .preview-box .md-codeblock pre code,
[data-theme="dark"] .topic_content .md-codeblock pre code,
[data-theme="dark"] .reply_content .md-codeblock pre code {
    color: #d4d4d4;
}

/* Table */
.preview-box table,
.topic_content table,
.reply_content table {
    border-collapse: collapse;
    width: 100%;
    margin: 10px 0;
}

.preview-box th,
.preview-box td,
.topic_content th,
.topic_content td,
.reply_content th,
.reply_content td {
    border: 1px solid var(--border-color);
    padding: 10px;
    text-align: left;
}

.preview-box th,
.topic_content th,
.reply_content th {
    background: var(--bg-tertiary);
}

/* Image */
.preview-box img,
.topic_content img,
.reply_content img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
}