/* ─── GitHub Style (từ ask.php) ─── */
    #cmt_input {
        background: #061021;
        border: none;
        padding: 15px;
        color: #d8d8d8;
        font-size: 15px;
        min-height: 90px;
        resize: vertical;
        outline: none;
        font-family: sans-serif;
        width: 100%;
        margin: 0;
        margin-bottom: -4px;
        box-sizing: border-box;
    }

    .chat-container {
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        display: flex;
        flex-direction: column;
        backdrop-filter: blur(16px);
        border: 1px solid rgba(15, 23, 42, 0.5);
        margin-bottom: 20px;
        border-radius: 8px;
        margin-top: 30px;
    }

    .chat-header {
        padding: 15px 20px;
        background: rgba(255, 255, 255, 0.05);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-radius: 8px 8px 0px 0px;
    }

    .chat-body {
        flex: 1;
        padding: 15px;
        overflow-y: auto;
        display: flex;
        flex-direction: column;
        gap: 20px;
        background: rgb(27 35 53 / 48%);
        border-radius: 0 0 8px 8px;
    }

    .gh-msg {
        display: flex;
        gap: 12px;
        width: 100%;
    }

    .gh-avatar {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        color: #94a3b8;
        flex-shrink: 0;
        border: 1px solid rgba(255, 255, 255, 0.1);
        overflow: hidden;
    }

    .gh-msg.admin .gh-avatar {
        background: rgb(30 121 100 / 23%);
        color: #2b9e84;
        border-color: rgb(43 159 132);
    }

    .gh-avatar img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        padding: 3px;
        box-sizing: border-box;
        border-radius: 100%;
    }

    .gh-content {
        flex: 1;
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 8px;
        overflow: hidden;
    }

    .gh-msg-header {
        padding: 10px;
        background: rgba(255, 255, 255, 0.04);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 13px;
    }

    .gh-msg.admin .gh-msg-header {
        background: rgb(30 121 100 / 5%);
        border-bottom-color: rgb(56 85 89);
    }

    .gh-user-info span,
    .gh-user-info .comment-author-link {
        font-weight: 600;
        color: #c9d1d9;
    }

    .comment-author-link {
        color: inherit;
        text-decoration: none;
        transition: opacity 0.2s ease, color 0.2s ease;
    }

    .comment-author-link:hover {
        opacity: 0.9;
        color: #93c5fd;
    }

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

    .gh-user-nickname {
        max-width: 100px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        display: inline-block;
        vertical-align: bottom;
    }

    .comment-mention {
        color: #2b9e84;
        font-weight: 600;
        font-size: 14px;
        margin-bottom: 4px;
        display: inline-block;
        text-decoration: none;
    }

    .timestamp-bottom {
        font-size: 11px;
        color: #8b949e;
        margin-top: 8px;
        font-weight: 400;
        text-align: right;
        border-top: 1px dashed #474c554a;
        padding-top: 8px;
    }

    .gh-badge {
        font-size: 11px;
        padding: 2px 8px;
        border-radius: 12px;
        border: 1px solid rgba(255, 255, 255, 0.2);
        color: #94a3b8;
        font-weight: 500;
    }

    .gh-msg.admin .gh-badge {
        color: #ffffff;
        background: #009688;
        border: 0px;
    }

    .gh-msg-body {
        padding: 10px;
        font-size: 15px;
        line-height: 1.6;
        color: #e2e8f0;
        word-break: break-word;
        background: #040a1266;
    }

    .chat-footer {
        background: rgba(15, 23, 42, 0.3);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .gh-form-footer-login {
        padding: 15px;
        text-align: center;
        background: #262f40;
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .gh-form-footer-login a {
        color: #60a5fa;
        text-decoration: none;
        font-weight: 600;
    }

    .gh-form-container {
        background: rgb(33 45 67 / 75%);
    }

    .gh-form-header {
        background: rgba(255, 255, 255, 0.03);
        padding: 10px 15px;
        font-size: 13px;
        font-weight: 500;
        color: #94a3b8;
    }

    .gh-form-footer {
        padding: 10px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        background: rgba(255, 255, 255, 0.02);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .btn-gh-send {
        background: #1a9150;
        color: white;
        border: none;
        padding: 8px 16px;
        border-radius: 6px;
        font-size: 14px;
        font-weight: 500;
        cursor: pointer;
        transition: background 0.2s;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .btn-gh-send:hover {
        background: #136638ff;
    }

    .btn-gh-send:disabled {
        background: #64748b;
        cursor: not-allowed;
        opacity: 0.7;
    }

    /* ─── A4 Paper Light Mode Override (Cho page-show.php) ─── */
    .a4-container #cmt_input {
        background: #ffffff;
        border: none;
        padding: 15px;
        color: #0f172a;
        font-size: 15px;
        min-height: 90px;
        resize: vertical;
        outline: none;
        font-family: sans-serif;
        width: 100%;
        margin: 0;
        margin-bottom: -4px;
        box-sizing: border-box;
    }

    .a4-container .gh-user-info span,
    .a4-container .gh-user-info .comment-author-link {
        font-weight: 600;
        color: #0f172a;
    }

    .a4-container .chat-container {
        border-color: rgba(0, 0, 0, 0.1);
        backdrop-filter: none;
        background: transparent;
        margin-bottom: 0px;
    }

    .a4-container .chat-header {
        background: rgba(255, 255, 255, 1);
        border-bottom-color: rgba(0, 0, 0, 0.08);
        color: #333;
    }

    .a4-container .chat-header span {
        color: #1e293b;
    }

    .a4-container .chat-header i {
        color: #3b82f6;
    }

    .a4-container .chat-body {
        background: #f8fafc;
    }

    .a4-container .gh-avatar {
        background: #f1f5f9;
        color: #475569;
        border-color: rgba(0, 0, 0, 0.08);
        font-weight: 600;
    }

    .a4-container .gh-content {
        background: #ffffff;
        box-shadow: none;
        border-color: #bfbfbfab;
    }

    .a4-container .gh-msg.admin .gh-msg-header {
        background: rgb(172 227 227 / 33%);
        border-bottom-color: rgb(129 185 193);
    }

    .a4-container .gh-form-footer-login {
        background: #f8fafc;
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .a4-container .gh-msg.admin .gh-content {
        border-color: rgb(129 185 193);
    }

    .a4-container .gh-msg.admin .gh-avatar {
        background: rgb(172 227 227 / 33%);
        border-color: rgb(129 185 193);
        color: rgb(129 185 193);
    }

    .a4-container .gh-msg-header {
        background: #f1f5f9;
        border-bottom-color: #bfbfbfab;
    }

    .a4-container .gh-user-info span {
        color: #0f172a;
    }

    .a4-container .timestamp-bottom {
        color: #64748b;
        border-top: 1px dashed #ccc;
    }

    .a4-container .gh-badge {
        border-color: #cbd5e1;
        color: #475569;
    }

    .a4-container .gh-msg-body {
        color: #334155;
        background: transparent;
    }

    .a4-container .chat-footer {
        background: #ccc;
        border-top-color: transparent;
    }

    .a4-container .gh-form-container {
        background: #ffffff;
    }

    .a4-container .gh-form-header {
        background: #f1f5f9;
        color: #475569;
        border-bottom: 1px solid #d7d7d7;
    }

    .a4-container #cmt_input {
        background: #ffffff;
        color: #0f172a;
    }

    .a4-container #cmt_input::placeholder {
        color: #94a3b8;
    }

    .a4-container .gh-form-footer {
        background: #f8fafc;
        border-top-color: #d7d7d7;
    }

    .a4-container .comment-toolbar {
        background: #f8fafc;
        border-top-color: rgba(0, 0, 0, 0.06);
    }

    .a4-container .comment-login-notice {
        color: #475569;
        background: #f1f5f9;
        border-radius: 8px;
    }

    /* Toolbar dưới bình luận */
    .comment-toolbar {
        padding: 10px;
        display: flex;
        align-items: center;
        gap: 10px;
        background: rgba(255, 255, 255, 0.02);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
        flex-wrap: wrap;
    }

    /* Nút Like */
    .comment-like-btn {
        display: flex;
        align-items: center;
        gap: 5px;
        font-size: 13px;
        color: #94a3b8;
        cursor: pointer;
        border: none;
        background: none;
        padding: 2px 0;
        transition: color 0.2s;
    }

    .comment-like-btn.liked {
        color: #f43f5e;
    }

    .comment-like-btn:hover {
        color: #f43f5e;
    }

    .comment-like-count {
        font-weight: 600;
        min-width: 14px;
    }

    /* Nút Trả lời */
    .comment-reply-btn {
        font-size: 13px;
        color: #6d7b8f;
        cursor: pointer;
        border: none;
        background: none;
        padding: 2px 0;
        transition: opacity 0.2s;
    }

    .comment-reply-btn:hover {
        opacity: 0.75;
        text-decoration: underline;
    }

    /* Badge trạng thái admin */
    .comment-status-badge {
        font-size: 11px;
        padding: 2px 8px;
        border-radius: 10px;
        font-weight: 500;
    }

    .status-approved {
        background: #607d8b;
        color: #ffffff;
    }

    .status-pending {
        background: rgba(234, 179, 8, 0.2);
        color: #fde68a;
    }

    .status-hidden {
        background: rgba(100, 116, 139, 0.2);
        color: #94a3b8;
    }

    /* Badge admin trong bình luận */
    .gh-badge.admin {
        border-color: rgb(35 134 54);
        color: #ffffff;
        background: rgb(35 134 54);
    }

    /* Badge tác giả trong bình luận */
    .gh-badge.author {
        border-color: rgb(26 145 80);
        color: #ffffff;
        background: rgb(26 145 80);
    }

    /* Chế độ đang trả lời */
    #cmt_input.replying {
        border-left: 3px solid #60a5fa;
    }

    button.bb-comment-a {
        border: none;
        background: none;
        color: rgb(35 134 54);
        padding: 0px;
    }

    button.bb-comment-b {
        border: none;
        background: none;
        color: rgb(239 68 68);
        padding: 0px;
    }

    button.bb-comment-a:hover,
    button.bb-comment-b:hover {
        opacity: 0.75;
    }

    a.btn-quan-ly {
        display: inline-flex;
        text-decoration: none;
        color: #fff;
        justify-content: center;
        align-items: center;
        gap: 10px;
        padding: 4px 15px;
        background: #41836d;
        border-radius: 20px;
    }

    a.btn-quan-ly i {
        color: #fff !important;
    }

    /* ─── Reply group: thụt vào 1 cấp cố định ─── */
    .comment-reply-group {
        display: flex;
        flex-direction: column;
        gap: 10px;
        padding-left: 12px;
        border-left: 1px dashed #cccccc24;
        margin-left: 55px;
    }

    .a4-container .comment-reply-group {
        border-left-color: rgba(59, 130, 246, 0.3);
    }

    /* Hiệu ứng cho bình luận mới */
    .highlight-avatar {
        border-color: #db5000 !important;
        transform: scale(1.15);
        z-index: 10;
    }

    .comment-item {
        transition: background-color 0.5s ease;
    }

    .gh-avatar {
        transition: all 0.3s ease;
    }

    #emoji_btn:hover {
        color: #60a5fa !important;
        transform: scale(1.1);
    }