/* ================================================================
   Neural Brain Chat - Professional UI v2.0
   ================================================================ */
.nb-chat-container *,
.nb-chat-container *::before,
.nb-chat-container *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn/Vazirmatn-Regular.woff2') format('woff2');
    font-weight: 400;
    font-display: swap;
}

@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn/Vazirmatn-Medium.woff2') format('woff2');
    font-weight: 500;
    font-display: swap;
}

@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn/Vazirmatn-Bold.woff2') format('woff2');
    font-weight: 700;
    font-display: swap;
}
/* ================================================================
   ROOT CONTAINER
   ================================================================ */
.nb-chat-container {
    display: flex;
    font-family: 'Vazirmatn', Tahoma, system-ui, -apple-system, sans-serif;
    background: var(--nb-background-3);
    color: var(--nb-text);
    overflow: hidden;
    position: relative;
    direction: rtl;
    border-radius: 4px;
    min-height: 260px;
    height: 100%; 
    box-shadow: 0 12px 48px rgba(0,0,0,.5);
    isolation: isolate;
}
.nb-primary-logo {
    width: 95%; 
}
/* ================================================================
   THEMES
   ================================================================ */

.nb-chat-container.nb-theme-dark {
--nb-background:#212121;
--nb-background-2:#141417;
--nb-background-3:#1c1b1f;
--nb-surface:#1f1f1f;
--nb-surface-2:#2a2a2a;
--nb-surface-3:#3d3d3d;
--nb-text:#ececf1;
--nb-text-dim:#c5c5d2;
--nb-text-green: #50fa7b;
--nb-text-muted:#8e8ea0;
--nb-text-inverse:#0f0f11;
--nb-ai-bubble:#2a2a2a;

/* ===== Syntax Highlight Colors (Dark Theme) ===== */
--nb-syntax-keyword: #ff79c6;     
--nb-syntax-number: #bd93f9;       
--nb-syntax-comment: #6272a4;      
--nb-syntax-function: #8be9fd;    
--nb-syntax-variable: #f1fa8c;    
--nb-syntax-operator: #ff79c6;    
--nb-syntax-class: #8be9fd;        
--nb-syntax-tag: #ff79c6;         
--nb-syntax-regex: #ffb86c;       
--nb-syntax-link: #00d0ff; 
--nb-high:#a78bfa;        
}

.nb-chat-container.nb-theme-light {
--nb-background:#ffffff;
--nb-background-2:#f7f7f8;
--nb-background-3:#f1f1f3;
--nb-surface:#ffffff;
--nb-surface-2:#f1f1f1;
--nb-surface-3:#bdbdbdcc;
--nb-text:#202123;
--nb-text-dim:#444654;
--nb-text-green: #2c8a75;          
--nb-text-muted:#6e6e80;
--nb-text-inverse:#ffffff;
--nb-ai-bubble:#f3f3f5;

/* ===== Syntax Highlight Colors (Light Theme) ===== */
--nb-syntax-keyword: #c43c8c;     
--nb-syntax-number: #6a4e9b;      
--nb-syntax-comment: #5a6e8a;     
--nb-syntax-function: #1c9e9e;    
--nb-syntax-variable: #b8860b;    
--nb-syntax-operator: #c43c8c;    
--nb-syntax-class: #1c9e9e;      
--nb-syntax-tag: #c43c8c;         
--nb-syntax-regex: #d2691e;      
--nb-syntax-link: #0099cc;    
--nb-high:#6366f1;    

}
/* ================================================================
   SIDEBAR
   ================================================================ */
.nb-chat-sidebar {
    width: 264px;
    min-width: 264px;
    background: var(--nb-background-2);
    border-bottom-left-radius: 23px; 
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--nb-ai-bubble);
    transition: width .3s cubic-bezier(.4,0,.2,1),
                min-width .3s cubic-bezier(.4,0,.2,1),
                opacity .2s ease;
    overflow: hidden;
}

.nb-chat-sidebar.nb-collapsed {
    width: 0;
    min-width: 0;
    opacity: 0;
}

.nb-chat-sidebar h5 {
    text-align: right; 
    margin: 12px;
    font-size: medium;
    font-family: 'Vazirmatn';
    font-weight: 500;
    color: var(--nb-text);

}
/* ── Sidebar Header ── */
.nb-sidebar-top {
    padding: 12px;
    border-bottom: 1px solid var(--nb-surface-3);
}
.nb-sidebar-header {
    padding: 7px 6px;
    display: flex;
    align-items: right;     
    justify-content: center;  
    gap: 12px;
    border-bottom: 1px solid var(--nb-surface-3);
    flex-shrink: 0;
}

.nb-sidebar-title {
    font-size: 15px;
    font-weight: 700;
    text-align: center;
    line-height: 1.9em;
    padding-top: 12px;
    color: var(--nb-text);
}
.nb-sidebar-toggle {
    background: transparent;
    border: none;
    color: var(--nb-text-dim);
    cursor: pointer;
    padding: 5px;
    border-radius: 8px;
    display: none;
    align-items: center;
    justify-content: center;
    transition: background .18s, color .18s;
    flex-shrink: 0;
}

.nb-sidebar-toggle:hover {
    background: var(--nb-surface-2);
    color: var(--nb-text-dim);
}

.nb-sidebar-toggle svg { width: 24px; height: 24px; }

/* ── New Chat Button ── */
.nb-new-chat {
    width: 100%;
    background: var(--nb-text-dim);
    border: none;
    border-radius: 12px;
    color: var(--nb-text-inverse);
    margin: 10px;
    padding: 12px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background .18s, border-color .18s, color .18s;
    white-space: nowrap;
}

.nb-new-chat:hover {
    background: var(--nb-surface-3);
    border-color: var(--nb-text-dim);
    color: var(--nb-text);
}

.nb-new-chat svg { width: 20px; height: 20px; flex-shrink: 0; }

/* === MAIN HEADER NEW CHAT BUTTON === */
.nb-header-new-chat {
    background: transparent;
    color: var(--nb-text-dim);
    border: none;
    border-radius: 50%;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s ease;
    margin: 0;
    white-space: nowrap;
    
}

.nb-header-new-chat svg {
    stroke: currentColor;
    width: 24px;
    height: 24px;
    transition: transform 0.25s ease;
}

.nb-header-new-chat:hover {
    background: linear-gradient(135deg, var(--nb-primary), #757575);
    transform: scale(1.08);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.6);
}

.nb-header-new-chat:active svg {
    transform: scale(0.9);
}

/* ── Conversations ── */
.nb-conversations {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--nb-ai-bubble) transparent;
}

.nb-conversations::-webkit-scrollbar { width: 4px; }
.nb-conversations::-webkit-scrollbar-track { background: transparent; }
.nb-conversations::-webkit-scrollbar-thumb {
    background: var(--nb-surface-2);
    border-radius: 4px;
}

.nb-conv-group-label {
    padding: 10px 16px 4px;
    font-size: 16px;
    font-weight: 700;
    color: var(--nb-text);
    text-transform: uppercase;
    letter-spacing: .6px;
}

.nb-conv {
    padding: 8px 12px;
    margin: 4px 4px 8px ;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 0 1px rgba(102, 136, 102, 0.26);
    border-right:solid 1px rgba(102, 136, 102, 0.3);
    font-size: 14px;
    font-weight: 500;
    color: var(--nb-text);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background .15s, color .15s;
    position: relative;
    overflow: hidden;
}

.nb-conv:hover  { background: var(--nb-surface-3); color: var(--nb-text-); }
.nb-conv.active { background: var(--nb-text-inverse); color: var(--nb-text); box-shadow: 0 0 3px rgba(61, 85, 83, 0.3);}

.nb-conv-icon {
    flex-shrink: 0;
    opacity: .6;
}
.nb-conv-icon svg {color: var(--nb-text); width: 20px; height: 20px;  display: block;}

.nb-conv-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nb-conv-delete {
    /* display: none; */
    background: transparent;
    border: none;
    color: #666;
    cursor: pointer;
    padding: 3px;
    border-radius: 5px;
    flex-shrink: 0;
    transition: color .15s;
}
.nb-conv:hover .nb-conv-delete { display: flex; color: #949494;}
.nb-conv-delete:hover { color: #ef4444; }
.nb-conv-delete svg { width: 15px; height: 15px; }

.nb-no-history {
    padding: 24px 16px;
    font-size: 14px;
    color: var(--nb-text-dim);
    text-align: center;
}
.nb-no-history svg {
    width: 32px;
    height: 32px;
}

.nb-history-group{
margin-bottom:18px;
}

.nb-history-title{
font-size:15px;
color: var(--nb-text);
opacity:.8;
padding:6px 10px;
font-weight:600;
}

/* ── Sidebar Footer ── */
.nb-sidebar-footer {
    padding: 6px 12px;
    border-top: 1px solid #2a2a2a;
    font-size: 12px;
    color: #7c7c7c;
    flex-shrink: 0;
}
/* باکس هشدار اتمام محدودیت */
.nb-plan-warning {
    background: rgba(255, 75, 75, 0.15);
    color: #ff4b4b;
    padding: 8px 12px;
    margin-bottom: 8px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 700;
    text-align: center;
    border: 1px solid rgba(255, 75, 75, 0.3);
    animation: nb-pulse-red 2s infinite;
}

@keyframes nb-pulse-red {
    0% { box-shadow: 0 0 0 0 rgba(255, 75, 75, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(255, 75, 75, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 75, 75, 0); }
}

/* دکمه ارتقا پلن (مخصوص اعضا) - تم طلایی نئون */
.nb-sidebar-upgrade-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--nb-primary), #ff9500);
    color: #000 !important;
    padding: 10px;
    border-radius: 12px;
    text-decoration: none !important;
    font-weight: 800;
    font-size: 14px;
    margin: 5px 0 15px 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(255, 149, 0, 0.3);
}

.nb-sidebar-upgrade-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 204, 0, 0.5);
    filter: brightness(1.1);
}
/* ================================================================
   MAIN PANEL
   ================================================================ */
.nb-chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--nb-background);
}
.nb-drop-overlay{
    position:absolute;
    inset:0;
    background:rgba(0,0,0,0.5);
    color:white;
    font-size:18px;
    display:none;
    align-items:center;
    justify-content:center;
    z-index:50;
}



.nb-file-icon{
 font-size:18px;
}

.nb-file-name{
 font-size:13px;
 font-weight:600;
}

.nb-file-size{
 font-size:11px;
 opacity:.6;
}

/* ── Header ── */
.nb-chat-header {
    display: flex;
    align-items: center;
    position: relative;
    justify-content: space-between;
    padding: 0 18px;
    min-height: 58px;
    border-bottom: 1px solid var(--nb-ai-bubble);
    background: linear-gradient(30deg,var(--nb-background-3)  50%, var(--nb-primary) 100%);
    gap: 12px;
    flex-shrink: 0;
}

.nb-header-right {
    display: flex;
    align-items: center;
    gap: 4px; /* کاهش فاصله بین آیکون‌ها */
}

.nb-header-right .nb-header-new-chat {
    margin-right: 0;
    margin-left: 0;
}

.nb-main-sidebar-toggle {
    background: transparent;
    border: none;
    color: var(--nb-text-dim);
    cursor: pointer;
    padding: 6px;
    border-radius: 50%;
    display: flex; /* تغییر از none به flex */
    align-items: center;
    justify-content: center;
}

.nb-main-sidebar-toggle:hover {
    background: linear-gradient(135deg, #7569f8a9 0%, var(--nb-primary) 100%);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.38);
    transform: scale(1.07);
 }
.nb-main-sidebar-toggle svg { width: 24px; height: 24px; }

.nb-chat-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--nb-text);
    letter-spacing: -.1px;
}

/* ────────────────────────────────
   MODEL SELECTOR – CUSTOM DROPDOWN
────────────────────────────────── */

.nb-model-dropdown {
    position: relative;
    user-select: none;
    direction: rtl;
}

/* دکمه انتخاب مدل */
.nb-model-selected {
    background: var(--nb-surface-3);
    border: 1px solid rgba(255,255,255,0.08);
    backdrop-filter: blur(12px);
    border-radius: 12px;
    padding: 10px 16px;
    color: var(--nb-text);
    font-family: inherit;
    font-weight: 700;
    display: flex;
    align-items: center;
    direction: ltr;
    gap: 8px;
    cursor: pointer;
    min-width: 210px;
    transition: background .2s, box-shadow .2s, border-color .2s;
}

.nb-model-selected:hover {
    border-color: var(--nb-primary);
    box-shadow: 0 0 10px rgba(120,99,241,0.4);
}

.nb-model-selected svg {
    margin-left: auto;
    opacity: 0.7;
    transition: transform .2s ease;
}

/* 🔽 لیست مدل‌ها */
.nb-model-list {
    position: absolute;
    top: 110%;
    left: 2%;
    width: 260px;
    background: var(--nb-background-2);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    padding: 8px 0;
    display: none;
    z-index: 9999;
    backdrop-filter: blur(16px);
    box-shadow:
        0 8px 22px rgba(0,0,0,0.45),
        0 0 0 1px rgba(255,255,255,0.05) inset;
    max-height: 460px;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Scrollbar */
.nb-model-list::-webkit-scrollbar { width: 6px; }
.nb-model-list::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 6px;
}
.nb-model-list::-webkit-scrollbar-thumb:hover { background:#666; }

/* آیتم انتخاب شده */
.nb-model-item.active {
    background: rgba(27,118,160,0.18);
    border-right: 3px solid var(--nb-primary);
}

/* آیتم‌ها */
.nb-model-item {
    display: flex;
    align-items: center;
    justify-content: space-between;    /* ❤️ مهم: جلوگیری از شلخته شدن UI */
    gap: 12px;
    padding: 10px 14px;
    cursor: pointer;
    transition: background .15s;
}

/* hover */
.nb-model-item:hover {
    background: rgba(255,255,255,0.06);
}

/* آیکون مدل */
.nb-model-icon {
    width: 26px;
    height: 26px;
    flex-shrink: 0;
    border-radius: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nb-m-icon-img {
    width: 22px;
    height: 22px;
    object-fit: contain;
    border-radius: 26px;
}

/* اطلاعات مدل – نام + زیرعنوان */
.nb-model-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.nb-model-name {
    color: var(--nb-text-dim);
    font-size: 14px;
    font-weight: 700;
}

.nb-model-sub {
    color: #aaa;
    font-size: 11px;
    margin-top: 2px;
}
.nb-model-demo-divider{
    padding:10px 14px;
    font-size:12px;
    font-weight:700;
    opacity:.55;
    border-top:1px solid rgba(156, 156, 156, 0.6);
    margin-top:6px;
}
/* مدل‌های دمو / قفل‌شده */
.nb-model-item.nb-model-demo {
    opacity: 0.45;
    cursor: default !important;
    pointer-events: none !important;
}

/* Badge VIP & PRO */
.nb-model-demo-badge {
    font-size: 10px;
    font-weight: 700;
    padding: 3px 7px;
    border-radius: 6px;
    white-space: nowrap;
    margin-left: 4px;
}

.nb-model-demo-badge.nb-pro {
    background: linear-gradient(135deg,#ff3b7f,#ff6b9c);
    color: #fff;
}

.nb-model-demo-badge.nb-vip {
    background: linear-gradient(135deg,#ffd500,#ffb300);
    color:#000;
}

/* 🔒 قفل */
.nb-model-demo-lock {
    font-size: 14px;
    opacity: 0.7;
    flex-shrink: 0;
    margin-left: 4px;
}

/* ================================================================
   MESSAGES
   ================================================================ */
.nb-chat-messages {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    scrollbar-width: thin;
    scrollbar-color: var(--nb-ai-bubble) transparent;
    padding-bottom: 8px;
}

.nb-chat-messages::-webkit-scrollbar { width: 6px; }
.nb-chat-messages::-webkit-scrollbar-track { background: transparent; }
.nb-chat-messages::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 6px;
}

/* ── Welcome Screen ── */
.nb-welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 22px;
    text-align: center;
    animation: nbFadeIn .4s ease;
}

.nb-welcome-logo {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--nb-primary, #6366f1) 0%, #5cdff6be 100%);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
    box-shadow: 0 6px 28px rgba(99,102,241,.35);
}

.nb-welcome-logo svg {
    width: 50px;
    height: 50px;
    stroke: #fff;
}
.nb-welcome-logo img {
    width: 100%;
    height: 100%;
    stroke: #fff;
}
.nb-welcome h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--nb-text-dim);
    margin-bottom: 10px;
    letter-spacing: -.2px;
}
/* عنوان انتخاب دستیار */
.nb-welcome-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--nb-text-dim);
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--nb-primary);
    display: inline-block;
    width: auto;
}
.nb-welcome  p {
    font-size: 20px;
    color: var(--nb-text-muted);
    max-width: 900px;
    line-height: 1.65;
    margin-bottom: 32px;
}

.nb-welcome-suggestions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    width: 100%;
    max-width: 520px;
}

.nb-suggestion {
    background: linear-gradient(135deg,var(--nb-surface-3)  10%, var(--nb-surface-2) 100%);
    border: 1px solid var(--nb-ai-bubble);
    border-radius: 12px;
    padding: 14px 16px;
    cursor: pointer;
    text-align: right;
    font-family: inherit;
    color: inherit;
    transition: background .2s, border-color .2s, transform .15s;
}

.nb-suggestion:hover {
    background: var(--nb-background);
    border-color: var(--nb-primary, #6366f1);
    transform: translateY(-2px);
}

.nb-suggestion-icon {
    color: var(--nb-primary);
    display: flex;
}

.nb-suggestion-icon svg{
    width:28px;
    height:28px;
    margin-bottom: 12px;
}

.nb-suggestion-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--nb-text);
    margin-bottom: 4px;
}

.nb-suggestion-sub {
    font-size: 12px;
    color: var(--nb-text-dim);
}
.nb-chat-container.nb-hide-welcome .nb-welcome-suggestions {
    display: none !important;
}

/* ================================================================
   ACTIVE ASSISTANT CHIP (نسخه جمع و جور)
   ================================================================ */
.nb-active-assistant {
    display: flex;
    justify-content: flex-start;
    padding: 6px 16px 0 16px;
    margin-bottom: -4px;
}

.nb-assistant-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--nb-primary);
    color: white;
    padding: 4px 8px 4px 12px;
    border-radius: 40px;
    font-size: 13px;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25);
    animation: nb-chip-slide-in 0.25s ease;
}

@keyframes nb-chip-slide-in {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.nb-assistant-chip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.nb-assistant-chip-icon svg {
    width: 22px;
    height: 22px;
    display: block;
}

.nb-assistant-chip-role {
    max-width: 180px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nb-assistant-chip-remove {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    transition: all 0.2s ease;
    padding: 0;
}

.nb-assistant-chip-remove:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

/* ================================================================
   ASSISTANT TOAST - (Floating)
   ================================================================ */
.nb-toast-assistant {
    position: fixed;
    top: 12%;
    left: 4%;
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--nb-surface);
    border: 1px solid var(--nb-ai-bubble);
    border-radius: 12px;
    padding: 10px 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    z-index: 99999;
    font-size: 13px;
    opacity: 0;
    transform: translateX(-100px);
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    max-width: 280px;
    cursor: default;
}

.nb-toast-assistant.show {
    opacity: 1;
    transform: translateX(0);
}

.nb-toast-assistant.hide {
    opacity: 0;
    transform: translateX(-100px);
}

.nb-toast-assistant-success {
    border-right: 3px solid #10b981;
}

.nb-toast-assistant-info {
    border-right: 3px solid #3b82f6;
}

.nb-toast-assistant-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nb-toast-assistant-icon svg {
    width: 18px;
    height: 18px;
    display: block;
}

.nb-toast-assistant-message {
    font-size: 13px;
    font-weight: 500;
    color: #a78bfa;
    line-height: 1.4;
}
/* ================================================================
   CONVERSATION ROLE BADGE
   ================================================================ */

.nb-conv-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.nb-conv-role-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: linear-gradient(135deg, var(--nb-primary, #6366f1), #8b5cf6);
    color: white;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 20px;
    width: fit-content;
    max-width: 95%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.nb-conv {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.nb-conv-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

/* در حالت active، badge را کمی برجسته‌تر کن */
.nb-conv.active .nb-conv-role-badge {
    background: linear-gradient(135deg, #ffffff, #e0e0e0);
    color: var(--nb-primary);
    box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

.nb-conv-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.nb-conv-role-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: linear-gradient(135deg, var(--nb-primary, #6366f1), #8b5cf6);
    color: white;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 20px;
    width: fit-content;
    max-width: 95%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
/* ── Message Row ── */
.nb-msg-row {
    padding: 8px 0;
    animation: nbSlideIn .22s ease;
}

.nb-msg-row.nb-user-row {
    background: transparent;
}

.nb-msg-row.nb-assistant-row {
    background: transparent;
}

.nb-msg-row:hover .nb-msg-actions {
    opacity: 1;
}

/* ── Inner layout ── */
.nb-msg-inner {
    display: flex;
    gap: 14px;
    max-width: 75%;
    margin: 0 auto;
    padding: 0 50px;
    align-items: flex-start;
}

.nb-msg-row.nb-user-row .nb-msg-inner {
    flex-direction: row-reverse;
}

/* ── Avatar ── */
.nb-msg-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 4px;
}

.nb-msg-avatar.nb-ai-avatar {
    background: linear-gradient(135deg, var(--nb-primary), var(--nb-surface-3));
}
.nb-ai-avatar svg {
    filter: drop-shadow(0 0 4px #6366f1aa);
}

.nb-msg-avatar.nb-user-avatar {
    background: var(--nb-ai-bubble);
    border: 1px solid #3a4a70;
}

.nb-msg-avatar svg {
    display: inline-block; 
    width: 20px;
    height: 20px;
    stroke: var(--nb-text-dim);
}

/* ── Bubble ── */
.nb-msg-bubble {
    flex: 1;
    min-width: 0;
}

.nb-msg-sender {
    font-size: 14px;
    font-weight: 700;
    color: #aaa;
    margin-bottom: 6px;
}

.nb-msg-row.nb-user-row .nb-msg-sender {
    text-align: right;
}

/* ── User Text ── */
.nb-msg-row.nb-user-row .nb-msg-text {
    background: var(--nb-background-3);
    border: 1px solid var(--nb-ai-bubble);
    border-radius: 16px 16px 4px 16px;
    padding: 12px 16px;
    font-size: 16px;
    font-weight: 500;
    line-height: 1.65;
    color: var(--nb-text-dim);
    word-break: break-word;
    display: inline-block;
    max-width: 100%;
    text-align: right;
}

/* ── Assistant Text ── */
.nb-msg-row.nb-assistant-row .nb-msg-text {
    font-size: 15px;
    font-weight: 500;
    line-height: 1.78;
    color: var(--nb-text-dim);
    word-break: break-word;
}

/* ── Markdown elements ── */
.nb-msg-text p { margin-bottom: 10px; }
.nb-msg-text p:last-child { margin-bottom: 0; }

.nb-msg-text h1,
.nb-msg-text h2,
.nb-msg-text h3,
.nb-msg-text h4 {
    color: var(--nb-text-dim);
    font-weight: 700;
    margin: 16px 0 8px;
    line-height: 1.4;
}

.nb-msg-text h1 { font-size: 23px; }
.nb-msg-text h2 { font-size: 20px; }
.nb-msg-text h3 { font-size: 17px; }

.nb-msg-text ul,
.nb-msg-text ol {
    padding-right: 22px;
    margin-bottom: 10px;
}

.nb-msg-text li { margin-bottom: 5px; }

.nb-msg-text strong { color: var(--nb-text); font-weight: 700; }
.nb-msg-text em { color: var(--nb-text-dim); }

.nb-msg-text a { color: var(--nb-primary); text-decoration: underline; }
.nb-msg-text a:hover { color: #a5b4fc; }

.nb-msg-text blockquote {
    border-right: 3px solid var(--nb-primary, #6366f1);
    padding-right: 12px;
    color: var(--nb-text-dim);
    margin: 10px 0;
    font-style: italic;
}

/* ── Inline code ── */
/* ── Inline code (کدهای داخل متن) ── */
.nb-msg-text :not(pre) > code {
    border-radius: 6px;
    padding: 2px 8px;
    font-size: 15px;
    font-weight: 700;
    color: var(--nb-high);
    display: inline-block;
    direction: ltr;
}


.nb-msg-text ul {
    padding-right: 20px;
    line-height: 1.9;
}

.nb-msg-text pre code {
    border-radius: 16px;
}
/* توضیحات کلیدی (Key Points) */
/* .nb-msg-text strong {
    color: var(--nb-primary);
    font-weight: 700;
}

.nb-msg-text em {
    color: var(--nb-text-dim);
    font-style: italic;
} */
/* ================================================================
   CODE BLOCK (ChatGPT Style)
   ================================================================ */
.nb-code-block {
    position: relative;
    background: var(--nb-surface);
    border-bottom: 1px solid var(--nb-surface-3);
    border-radius: 12px;
    margin: 12px 0;
    overflow: hidden;
    direction: ltr;
    text-align: left;
}

.nb-code-header {
    background: linear-gradient(135deg, var(--nb-background-2), var(--nb-surface-3));
    padding: 8px 12px;
    border-bottom: 1px solid var(--nb-ai-bubble);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: monospace;
}

.nb-code-lang {
    font-size: 13px;
    line-height: 1.7em;
    opacity: 0.8;
    color: var(--nb-text-dim);
}

.nb-copy-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--nb-text-dim);
    padding: 4px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nb-copy-btn:hover {
    background: var(--nb-surface-2);
    color: var(--nb-primary);
}

.nb-code-block pre {
    margin: 0;
    padding: 14px;
    overflow-x: auto;
    background: var(--nb-background-3);
}

.nb-code-block code {
    font-family: Consolas, 'Fira Code', monospace;
    font-size: 13px;
    line-height: 1.7em;    
    white-space: pre;
    direction: ltr;
    text-align: left;
    color: var(--nb-text-dim);
}

/* ============================================================
   Highlight.js Syntax Highlighting (با متغیرهای تم)
   ============================================================ */
.nb-code-block .hljs {
    background: transparent !important;
    color: var(--nb-text-dim) !important;
}

/* کلمات کلیدی */
.nb-code-block .hljs-keyword,
.nb-code-block .hljs-selector-tag,
.nb-code-block .hljs-literal,
.nb-code-block .hljs-title,
.nb-code-block .hljs-section,
.nb-code-block .hljs-doctag {
    color: var(--nb-syntax-keyword);
}

/* رشته‌ها */
.nb-code-block .hljs-string,
.nb-code-block .hljs-attr,
.nb-code-block .hljs-addition {
    color: var(--nb-text-green);
}

/* اعداد */
.nb-code-block .hljs-number,
.nb-code-block .hljs-literal {
    color: var(--nb-syntax-number);
}

/* کامنت‌ها */
.nb-code-block .hljs-comment {
    color: var(--nb-syntax-comment);
    font-style: italic;
}

/* توابع */
.nb-code-block .hljs-function .hljs-title,
.nb-code-block .hljs-title.function {
    color: var(--nb-syntax-function);
}

/* ثابت‌ها / متغیرها */
.nb-code-block .hljs-variable,
.nb-code-block .hljs-template-variable {
    color: var(--nb-syntax-variable);
}

/* عملگرها */
.nb-code-block .hljs-operator {
    color: var(--nb-syntax-operator);
}

/* کلاس‌ها */
.nb-code-block .hljs-class .hljs-title {
    color: var(--nb-syntax-class);
}

/* تگ‌های HTML */
.nb-code-block .hljs-tag {
    color: var(--nb-syntax-tag);
}

.nb-code-block .hljs-name {
    color: var(--nb-text-green);
}

.nb-code-block .hljs-attribute {
    color: var(--nb-text-green);
}

/* Boolean / Built-in */
.nb-code-block .hljs-built_in,
.nb-code-block .hljs-builtin-name {
    color: var(--nb-syntax-function);
}

/* Regex */
.nb-code-block .hljs-regexp {
    color: var(--nb-syntax-regex);
}

/* Markdown Link */
.nb-code-block .hljs-link {
    color: var(--nb-syntax-link);
    text-decoration: underline;
}

.nb-think-block {
    margin: 12px 0;
    border: 1px solid var(--nb-text-dim);
    border-radius: 6px;
    background: var(--nb-text);
}

.nb-think-header {
    padding: 10px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
}

.nb-think-icon {
    width: 16px;
    height: 16px;
    transition: transform 0.2s;
}

.nb-think-block:not(.collapsed) .nb-think-icon {
    transform: rotate(90deg);
}

.nb-think-content {
    padding: 0 12px 12px 36px;
    white-space: pre-wrap;
    font-family: monospace;
    font-size: 14px;
    color: var(--nb-surface-3);
    max-height: 500px;
    overflow-y: auto;
}

.nb-think-block.collapsed .nb-think-content {
    display: none;
}
/* ── Message Actions ── */
.nb-msg-actions {
    display: flex;
    gap: 4px;
    margin-top: 8px;
    opacity: 0;
    transition: opacity .2s ease;
}

.nb-msg-row.nb-user-row .nb-msg-actions {
    justify-content: flex-end;
}

.nb-action-btn {
    width: 64px; 
    height: 34px;
    background: transparent;
    border: 1px solid var(--nb-surface);
    color: #666;
    border-radius: 16px;
    padding: 4px, 6px, 8px;
    cursor: pointer;
    font-size: 11.5px;
    font-family: inherit;
    transition: background .15s, color .15s, border-color .15s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.nb-action-btn:hover {
    background: var(--nb-background-2);
    color: #ececec;
    border-color: var(--nb-surface-3);
}

.nb-action-btn svg { width: 15px; height: 15px; }

/* ── Typing Indicator ── */
.nb-typing-row {
    padding: 8px 0;
}

.nb-typing-inner {
    display: flex;
    gap: 14px;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    align-items: center;
}

.nb-typing-dots {
    display: flex;
    align-items: center;
    gap: 5px;
    border-radius: 14px;
    padding: 12px 18px;

}

.nb-dot {
    width: 7px;
    height: 7px;
    background: var(--nb-text-dim);
    border-radius: 50%;
    animation: nbBounce 1.4s infinite ease-in-out both;
}

.nb-dot:nth-child(1) { animation-delay: 0s; }
.nb-dot:nth-child(2) { animation-delay: .18s; }
.nb-dot:nth-child(3) { animation-delay: .36s; }

@keyframes nbBounce {
    0%, 80%, 100% { transform: scale(.65); opacity: .5; }
    40%            { transform: scale(1);   opacity: 1; }
}

/* ── Error Message ── */
.nb-error-msg {
    max-width: 800px;
    margin: 10px auto;
    padding: 0 20px;
    animation: nbErrorFade .25s ease;
}

.nb-error-inner {

    background: linear-gradient(
        135deg,
        rgba(239,68,68,.18),
        rgba(239,68,68,.08)
    );

    border: 1px solid rgba(239,68,68,.35);
    border-radius: 14px;

    padding: 14px 18px;

    font-size: 16.5px;
    line-height: 1.7;

    color: #fca5a5;

    display: flex;
    align-items: center;
    gap: 10px;

    box-shadow:
        0 6px 20px rgba(0,0,0,.35),
        inset 0 0 0 1px rgba(255,255,255,.02);

    backdrop-filter: blur(4px);

    transition:
        border-color .2s ease,
        background .2s ease,
        transform .15s ease;
}

.nb-error-inner:hover {

    border-color: rgba(239,68,68,.5);

    background: linear-gradient(
        135deg,
        rgba(239,68,68,.22),
        rgba(239,68,68,.12)
    );

    transform: translateY(-1px);
}

.nb-error-inner svg {

    width: 18px;
    height: 18px;
    flex-shrink: 0;

    stroke: #f87171;

    filter: drop-shadow(0 0 4px rgba(239,68,68,.35));
}

/* subtle entrance animation */
@keyframes nbErrorFade {

    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* ================================================================
   INPUT AREA
   ================================================================ */
.nb-chat-input-area {   
    padding: 14px 12px 20px;
    margin-left: 15%;
    margin-right: 15%;
    background: var(--nb-background);
    flex-shrink: 0;
}

.nb-input-wrapper {
    display: flex;
    position: relative;
    align-items: flex-end;
    gap: 8px;
    background: var(--nb-surface-2);
    border: 2px solid var(--nb-ai-bubble);
    border-radius: 35px;
    padding: 8px 8px 8px ;
    transition: box-shadow .2s;
}

.nb-input-wrapper:focus-within {
    border-color: transparent;
    box-shadow: 0 0 0 3px rgba(71, 71, 71, 0.12);
}

.nb-input-wrapper:focus-within::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 35px;
    padding: 1px;

    background: radial-gradient(
        circle,
        color-mix(in srgb, var(--nb-primary) 60%, transparent) 0%,
        color-mix(in srgb, var(--nb-primary, #716775) 20%, transparent) 70%,
        transparent 100%
    );

    mask:
        linear-gradient(#000 0 0) content-box,
        linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;

    pointer-events: none;
}

/* دکمه‌های عملیاتی پیام (Like, Retry, Copy) */
.nb-msg-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
    opacity: 0; /* مخفی در حالت عادی */
    transition: opacity 0.2s ease;
}

.nb-msg-row:hover .nb-msg-actions {
    opacity: 1; /* نمایش هنگام هاور */
}

.nb-action-btn {
    background: transparent;
    border: 1px solid var(--nb-ai-bubble);
    color: var(--nb-text-muted);
    padding: 6px;
    width: 28px;
    height: 28px;    
    border-radius: 50%;
    font-size: 13px;
    display: flex;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.2s;
}

.nb-action-btn:hover {
    background: var(--nb-surface-2);
    color: var(--nb-text);
    border-color: var(--nb-text-muted);
}

.nb-action-btn.active {
    color: var(--nb-primary);
    border-color: var(--nb-primary);
}

/* ───────────────────────────────
   Stop Button – Modern Square UI
──────────────────────────────── */
.nb-stop-btn {
    width: 40px;
    height: 40px;
    min-width: 36px;
    border-radius: 50%; /* مربع مدرن */
    border: none;
    background: #ef4444; /* قرمز GPT-style */
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .2s, transform .12s, opacity .2s;
    flex-shrink: 0;
}

.nb-stop-btn:hover {
    background: #dc2626;
}

.nb-stop-btn:active {
    transform: scale(.92);
}

.nb-stop-btn svg {
    width: 20px;
    height: 20px;
}

/* ───────────────────────────────
   Send Button improvements
──────────────────────────────── */
.nb-send-btn {
    opacity: 1 !important;         /* همیشه دیده شود */
}

.nb-send-btn.nb-disabled {
    opacity: .5;
    background: #6b7280;
    cursor: not-allowed;
}

.nb-send-btn.nb-disabled svg {
    opacity: .7;
}


/* انیمیشن برای دکمه ریترای */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.nb-btn-retry.loading svg {
    animation: spin 1s linear infinite;
}

.nb-chat-input-area textarea {
    flex: 1;
    resize: none;
    border: none;
    outline: none;
    box-shadow: none !important;
    -webkit-box-shadow: none !important;
    background: transparent !important;
    color: var(--nb-text-dim);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.6;
    max-height: 180px;
    min-height: 28px;
    padding: 8px 6px;
    font-family: inherit;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--nb-ai-bubble) transparent;
    direction: auto;
}

.nb-chat-input-area textarea::placeholder {
    text-align: right;
    font-weight: 500;
    color: #838383;
    
}
.nb-attach-btn {
    background: transparent;
    border: none;
    border-radius: 50%;
    padding: 8px;
    cursor: pointer;
    color: var(--nb-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s;
}

.nb-attach-btn:hover {
    opacity: 0.7;
}

.nb-attach-btn svg {
    width: 20px;
    height: 20px;
}
.nb-upload-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--nb-primary);
    transition: width 0.1s linear;
    border-radius: 2px;
}
/* Toast Notification برای Paste */
.nb-toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--nb-surface);
    color: var(--nb-text);
    padding: 10px 20px;
    border-radius: 40px;
    font-size: 13px;
    z-index: 10001;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    border: 1px solid var(--nb-ai-bubble);
    display: flex;
    align-items: center;
    gap: 8px;
    direction: rtl;
}

.nb-toast.show {
    transform: translateX(-50%) translateY(0);
}

.nb-toast .dashicons {
    font-size: 16px;
    width: 16px;
    height: 16px;
}
.nb-file-preview {
    display: none;
    width: 100%;
    padding: 8px 14px;
    background: var(--nb-background-2);
    border-bottom: 1px solid var(--nb-ai-bubble);
}

.nb-file-thumb {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--nb-surface-2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}
.nb-file-preview:hover {
    background: rgba(99, 102, 241, 0.12);
    border-color: var(--nb-primary);
}

.nb-file-icon{
    display:flex;
    align-items:center;
    color:var(--nb-primary);
}


.nb-file-info {
    flex: 1;
}

.nb-file-name {
    font-size: 14px;
    font-weight: 600;
}

.nb-file-size {
    font-size: 12px;
    opacity: .6;
    margin-top: 2px;
}

.nb-file-progress {
    margin-top: 6px;
    width: 100%;
    height: 4px;
    background: var(--nb-surface);
    border-radius: 2px;
    overflow: hidden;
}

.nb-file-progress-bar {
    width: 0%;
    height: 100%;
    background: var(--nb-primary);
    transition: width .3s ease;
}

.nb-file-remove {
    background: var(--nb-surface-3);
    border: none;
    color: var(--nb-text);
    font-size: 18px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
}
.nb-file-remove:hover {
    background: #cc0000;
}



.nb-file-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--nb-surface);
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid var(--nb-surface-2);
}
/* ===============================
   File message bubble (user/assistant)
   =============================== */

.nb-msg-file-box {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 8px;
}

.nb-msg-file-thumb img {
    width: 48px;
    height: 48px;
    border-radius: 6px;
    object-fit: cover;
}

.nb-msg-file-icon {
    font-size: 28px;
    opacity: .85;
}

.nb-msg-file-info {
    display: flex;
    flex-direction: column;
}

.nb-msg-file-name {
    font-size: 14px;
    font-weight: 600;
}

.nb-msg-file-size {
    font-size: 12px;
    opacity: 0.6;
}

.nb-msg-file-status {
    margin-left: auto;
    font-size: 12px;
    color: var(--nb-primary);
    opacity: .75;
}


.nb-chat-messages.nb-drag-over {
    border: 2px dashed var(--nb-primary);
    background: rgba(99, 102, 241, 0.05);
}
/* Progress bar */

.nb-file-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ── Send Button ── */
.nb-send-btn {
    width: 40px;
    height: 40px;
    min-width: 36px;
    border-radius: 50%;
    border: none;
    background: var(--nb-primary, #6366f1);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .2s, transform .12s, opacity .2s;
    flex-shrink: 0;
}

.nb-send-btn:hover:not(:disabled) {
    background: #4f46e5;
}

.nb-send-btn:active:not(:disabled) {
    transform: scale(.92);
}

.nb-send-btn:disabled {
    background: #696969;
    cursor: not-allowed;
    opacity: .5;
}

.nb-send-btn svg { width: 18px; height: 18px; }

/* ── Footer hint ── */
.nb-input-footer {
    text-align: center;
    margin-top: 6px;
}

.nb-disclaimer {
    font-size: 11.5px;
    color: var(--nb-surface-3);
}

.nb-chat-wrapper {
    height: var(--nb-chat-height, 500px);
    max-height: var(--nb-chat-height, 500px);
    display: flex;
    flex-direction: column;
}
/* =========================================
   User Menu & Dropdown Styles
========================================= */

.nb-user-menu-container {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 10px;
}

.nb-user-menu-toggle {
    background: transparent;
    border: none;
    padding: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--nb-text-dim); 
    border-radius: 50%;
    transition: background-color 0.2s ease, color 0.2s ease;
    outline: none;
}

/* افکت هاور روی دکمه آواتار */
.nb-user-menu-toggle:hover,
.nb-user-menu-toggle:focus {
    background: linear-gradient(135deg, #7469f8 0%, var(--nb-primary) 100%);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.38);
    transform: scale(1.07);
}

.nb-user-plan-badge{
    display:inline-block;
    margin-right:8px;
    padding:2px 8px;
    font-size:11px;
    font-weight:700;
    border-radius:12px;
    background:var(--nb-primary);
    color:var(--nb-text);
    vertical-align:middle;
}

.nb-avatar-svg {
    width: 26px;
    height: 26px;
}


.nb-user-dropdown {
    position: absolute;
    top: calc(100% + 8px); 
    right: 0; 
    width: 160px;
    background-color: var(--nb-background-3);
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    padding: 8px 0;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}


.nb-user-dropdown.nb-active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nb-user-info {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--nb-text);
    text-align: right;
    direction: rtl;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nb-dropdown-divider {
    height: 1px;
    background-color: #f3f4f6;
    margin: 6px 0;
}

.nb-dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 14px;
    color: var(--nb-text);
    text-decoration: none;
    text-align: right;
    direction: rtl;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.nb-dropdown-item:hover {
    background-color: #f9fafb;
    color: #dc2626; 
}

.nb-dropdown-item svg {
    flex-shrink: 0;
}

.nb-user-name {
    font-size: 13px;
    font-weight: 600;
    color: #0fbbff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nb-user-email {
    font-size: 11px;
    color: #7c7c7c;
    margin-top: 4px;
    direction: ltr; 
    text-align: right;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: normal;
}

.nb-dropdown-item.nb-logout-item:hover {
    background-color: #fef2f2;
    color: #dc2626;
}

.nb-sidebar-footer{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding: 10px;
}

.nb-theme-toggle{
    border:none;
    background:transparent;
    cursor:pointer;
    color:inherit;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:6px;
    border-radius:50%;
    transition:background .2s;
}

.nb-theme-toggle:hover{
    background:rgba(255,255,255,.08);
    color:var(--nb-text);
}

.nb-theme-icon{
    display:none;
}

.nb-theme-dark .nb-theme-light{
    display:block;
    
}

.nb-theme-light .nb-theme-dark{
    display:block;
}

/* ================================================================
   GUEST CTA (ONLY IN SIDEBAR FOOTER)
   ================================================================ */
.nb-footer-bottom{
    display: flex;
    gap: 12px;
}
.nb-guest-cta-box {
    display: inline;
    border-radius: 14px;
    text-align: center;
    box-shadow:
        0 0 12px rgba(0,255,249,0.16),
        inset 0 0 12px rgba(0,255,249,0.15);
}


.nb-guest-cta-btn {
    display: block;
    width: 100%;
    padding: 8px 10px;
    border-radius: 14px;
    background: linear-gradient(90deg,var(--nb-primary),#00e1ff);
    text-decoration: none;
    font-weight: 700;
    color: var(--nb-text-inverse);
    font-size: 14px;
    font-family: inherit;
    box-shadow:
        0 0 12px #00fff9,
        inset 0 0 6px rgba(255,255,255,0.5);

    transition: .25s ease;
}

.nb-guest-cta-btn:hover {
    transform: translateY(-2px) scale(1.04);
    box-shadow:
        0 0 18px #00fff9,
        inset 0 0 10px rgba(255,255,255,0.55);
}


/* ================================================================
   ANIMATIONS
   ================================================================ */
@keyframes nbSlideIn {
    from { opacity: 0; transform: translateY(5px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

/* ================================================================
   RESPONSIVE
   ================================================================ */

/* Laptop */
@media (max-width: 1200px) {
    .nb-msg-inner {
        padding: 0 20px;
    }
}


/* Tablet Landscape */
@media (max-width: 1024px) {
    .nb-chat-container {
        position: relative !important;
        width: 100%;
        height: 100dvh !important;
        min-height: 520px;
        max-height: none !important;
        border-radius: 12px;
        z-index: 1;
    }

    body > .nb-chat-container.nb-fullscreen {
        position: fixed !important;
        inset: 0;
        width: 100vw;
        height: 100dvh;
        min-height: 100dvh;
        max-height: 100dvh;
        border-radius: 0 !important;
        z-index: 9999;
    }

    .nb-chat-main {
        height: 100%;
        width: 100%;
        min-height: 420px;
    }

    .nb-chat-sidebar {
        position: absolute;
        right: 0;
        top: 0;
        bottom: 0;
        z-index: 20;
        transform: translateX(0);
        background: var(--nb-background);
        transition: transform .3s ease, opacity .3s ease;
        border-radius: 0 14px 14px 0;
    }

    .nb-sidebar-toggle {
        display: flex;
    }

    .nb-chat-sidebar.nb-collapsed {
        width: 260px;
        min-width: 260px;
        opacity: 0;
        transform: translateX(100%);
    }
    .nb-chat-sidebar:not(.nb-collapsed) ~ .nb-chat-main {
        opacity: 0.95;
        transition: opacity 0.2s ease;
    }
    
    .nb-chat-sidebar:not(.nb-collapsed) ~ .nb-chat-main::before {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.3);
        z-index: 15;
        pointer-events: none;
    }
    .nb-main-sidebar-toggle {
        display: flex !important;
    }

    .nb-welcome-suggestions {
        grid-template-columns: 1fr;
    }

    .nb-msg-inner {
        padding: 0 14px;
    }
}


/* Tablet Portrait */
@media (max-width: 768px) {

    .nb-chat-input-area {
        margin-left: 6%;
        margin-right: 6%;
    }

    .nb-chat-container {
        position: relative !important;
        height: 100dvh !important;
        max-height: none !important;
        min-height: 460px;
        border-radius: 12px;
        z-index: 1;
    }

    body > .nb-chat-container.nb-fullscreen {
        position: fixed !important;
        inset: 0;
        height: 100dvh !important;
        max-height: 100dvh !important;
        border-radius: 0 !important;
        z-index: 9999;
    }

    .nb-model-select select,
    #nb-model {
        max-width: 160px;
    }

    .nb-chat-sidebar {
        position: absolute;
        right: 0;
        top: 0;
        bottom: 0;
        z-index: 20;
        transform: translateX(0);
        transition: transform .3s ease, opacity .3s ease;
        border-radius: 0 14px 14px 0;
    }

    .nb-chat-sidebar.nb-collapsed {
        width: 260px;
        min-width: 260px;
        opacity: 0;
        transform: translateX(100%);
    }

    .nb-main-sidebar-toggle {
        display: flex !important;
    }

    .nb-sidebar-toggle {
        display: flex;
    }

    .nb-welcome-suggestions {
        grid-template-columns: 1fr;
    }

    .nb-chat-main {
        width: 100%;
        height: 100%;
        min-height: 420px;
    }

    .nb-msg-inner {
        max-width: 90%;
        padding: 0 14px;
    }
}


/* Mobile */
@media (max-width: 480px) {

    .nb-chat-sidebar.nb-collapsed {
        transform: translateX(100%);
        opacity: 0;
    }

    .nb-chat-title {
        display: none;
    }

    .nb-msg-inner {
        padding: 0 10px;
    }

    .nb-header-new-chat {
        padding: 4px;
        margin-right: -5px;
    }

    .nb-header-new-chat svg {
        width: 26px;
        height: 26px;
    }

    .nb-welcome-logo svg,
    .nb-welcome-logo img {
        width: 42px;
        height: 42px;
    }

    .nb-welcome h2 {
        font-size: 20px;
    }
    .nb-welcome-title {
        font-size: 16px;
        margin-bottom: 15px;
        padding-bottom: 8px;
        display: block;
        width: 85%;
        margin-left: auto;
        margin-right: auto;
    }
    .nb-welcome p {
        font-size: 18px;
    }
    .nb-welcome-suggestions {
        grid-template-columns: repeat(2, 1fr);
    }

    .nb-model-selected {
        max-width: 210px;
        min-width: 0 !important;
    }
    .nb-model-list {
        width: 320px;
        max-height: 640px;
    }
    #nb-model-selected-label {
        max-width: 220px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .nb-model-name {
        font-size: 16px;
    }

}