/* ===== CSS Variables - Jerry Navy Blue Theme ===== */
:root {
    /* Colors - Navy Blue Theme (matches Jerry AI) */
    --bg-primary: #030712;
    --bg-secondary: #0A1628;
    --bg-tertiary: #111827;
    --bg-chat: #030712;
    --bg-input: #1E293B;
    --bg-hover: #1E293B;
    --bg-message-user: rgba(59, 130, 246, 0.1);
    --bg-message-ai: transparent;
    
    /* Brand - Navy Blue Theme */
    --primary: #1E3A5F;
    --primary-light: #3B82F6;
    --primary-dark: #162D4A;
    --accent: #0EA5E9;
    --accent-hover: #06B6D4;
    --accent-soft: rgba(14, 165, 233, 0.1);
    --accent-glow: rgba(59, 130, 246, 0.15);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1E3A5F 0%, #2563EB 50%, #0EA5E9 100%);
    --gradient-cta: linear-gradient(135deg, #1E3A5F 0%, #3B82F6 100%);
    --gradient-text: linear-gradient(135deg, #60A5FA 0%, #06B6D4 100%);
    --accent-gradient: linear-gradient(135deg, #3B82F6, #0EA5E9);
    
    /* Legacy accent mappings */
    --accent-primary: var(--primary-light);
    --accent-secondary: #10B981;
    
    /* Text */
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-tertiary: #64748B;
    --text-link: var(--accent);
    
    /* Message Colors */
    --user-msg-bg: var(--bg-message-user);
    --ai-msg-bg: var(--bg-message-ai);
    
    /* Borders */
    --border: #1E293B;
    --border-color: var(--border);
    --border-light: rgba(30, 41, 59, 0.5);
    --border-accent: rgba(59, 130, 246, 0.2);
    
    /* Surfaces (glass effect) */
    --surface-glass: rgba(10, 22, 40, 0.7);
    --surface-glass-strong: rgba(10, 22, 40, 0.85);
    
    /* Radius */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --border-radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.4);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 60px rgba(59, 130, 246, 0.15);
    --shadow-btn: 0 4px 20px rgba(59, 130, 246, 0.4);
    
    /* Transitions */
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Layout */
    --header-height: 56px;
    --max-width: 768px;
    --side-panel-width: 360px;
    --input-height: 80px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    text-decoration: underline;
}

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

input, textarea {
    font-family: inherit;
    border: none;
    outline: none;
}

/* ===== Scrollbar - Minimal ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: var(--border-radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ===== App Layout ===== */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    margin-left: 260px;
    transition: margin-left 0.3s var(--ease);
}

.app-container.left-collapsed {
    margin-left: 0;
}

/* ===== Left Panel - Chat History ===== */
.left-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 260px;
    height: 100vh;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-light);
    z-index: 200;
    display: flex;
    flex-direction: column;
    transform: translateX(0);
    transition: transform 0.3s var(--ease), width 0.3s var(--ease);
}

.left-panel.collapsed {
    transform: translateX(-100%);
}

.left-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid var(--border-light);
}

.profile-section {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

.profile-avatar {
    width: 36px;
    height: 36px;
    min-width: 36px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.875rem;
}

.profile-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.profile-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-status {
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

.collapse-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    transition: var(--transition);
}

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

/* New Chat Button */
.new-chat-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 12px 12px 8px;
    padding: 12px 16px;
    background: var(--gradient-cta);
    border-radius: var(--border-radius-md);
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow-btn);
}

.new-chat-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(59, 130, 246, 0.4);
}

.new-chat-btn i {
    font-size: 0.8rem;
}

/* Chat History Container */
.chat-history-container {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.chat-section {
    margin-bottom: 8px;
}

.chat-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.chat-section-title i {
    font-size: 0.65rem;
}

.pinned-section {
    display: none;
}

.pinned-section.has-items {
    display: block;
}

.chat-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Chat Item */
.chat-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    margin: 0 8px;
    background: transparent;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.chat-item:hover {
    background: var(--bg-hover);
}

.chat-item.active {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid var(--border-accent);
}

.chat-item-icon {
    width: 28px;
    height: 28px;
    min-width: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.chat-item.active .chat-item-icon {
    background: var(--gradient-primary);
    color: white;
}

.chat-item-info {
    flex: 1;
    min-width: 0;
}

.chat-item-title {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item-date {
    font-size: 0.65rem;
    color: var(--text-tertiary);
}

.chat-item-pin {
    position: absolute;
    top: 6px;
    right: 6px;
    font-size: 0.55rem;
    color: var(--primary-light);
    opacity: 0.7;
}

.chat-item-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: var(--transition);
}

.chat-item:hover .chat-item-actions {
    opacity: 1;
}

.chat-item-btn {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.7rem;
    transition: var(--transition);
}

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

/* Left Panel Footer */
.left-panel-footer {
    padding: 12px;
    border-top: 1px solid var(--border-light);
}

.footer-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    background: transparent;
    border-radius: var(--border-radius-md);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    transition: var(--transition);
}

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

.footer-btn i {
    width: 18px;
    text-align: center;
}

/* Left Panel Overlay */
.left-panel-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 199;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.left-panel-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* Chat Context Menu */
.chat-context-menu {
    position: fixed;
    min-width: 140px;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-accent);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-xl);
    padding: 6px;
    z-index: 2001;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.95);
    transition: var(--transition);
}

.chat-context-menu.show {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 8px 12px;
    background: transparent;
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.8125rem;
    transition: var(--transition);
}

.context-menu-item:hover {
    background: var(--bg-hover);
}

.context-menu-item i {
    width: 14px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.context-menu-item.delete {
    color: #ef4444;
}

.context-menu-item.delete i {
    color: #ef4444;
}

.context-menu-item.delete:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Menu Button (Mobile) */
.menu-btn {
    display: none;
}

/* ===== Header - Glassmorphism ===== */
.app-header {
    height: var(--header-height);
    background: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

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

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: white;
}

.logo-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Model Selector - Modern */
.model-selector {
    position: relative;
}

.model-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: rgba(10, 22, 40, 0.6);
    border: 1px solid var(--border-accent);
    border-radius: var(--border-radius-full);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.model-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--primary-light);
}

.model-btn i:first-child {
    color: var(--accent);
    font-size: 0.8rem;
}

.model-btn i:last-child {
    font-size: 0.625rem;
    color: var(--text-secondary);
    transition: transform var(--transition);
}

.model-btn.active i:last-child {
    transform: rotate(180deg);
}

.model-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    min-width: 240px;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-accent);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    overflow: hidden;
}

.model-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.model-group {
    padding: 6px 0;
}

.model-group:not(:last-child) {
    border-bottom: 1px solid var(--border);
}

.model-group-title {
    padding: 8px 14px 4px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.model-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    cursor: pointer;
    transition: background var(--transition);
}

.model-option:hover {
    background: var(--bg-hover);
}

.model-option i {
    width: 14px;
    font-size: 0.75rem;
    color: transparent;
}

.model-option.selected i {
    color: var(--primary-light);
}

.model-option span:first-of-type {
    flex: 1;
    font-size: 0.875rem;
}

.model-badge {
    padding: 2px 8px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-light);
    font-size: 0.65rem;
    font-weight: 600;
    border-radius: var(--border-radius-full);
}

.model-badge.premium {
    background: rgba(251, 191, 36, 0.1);
    color: #fbbf24;
}

/* Icon Buttons */
.icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 1rem;
    transition: var(--transition);
}

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

/* Tools Button - Bright Accent */
.tools-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: linear-gradient(135deg, #0EA5E9 0%, #3B82F6 100%);
    border-radius: var(--border-radius-full);
    color: white;
    font-size: 0.8125rem;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 2px 12px rgba(14, 165, 233, 0.4);
}

.tools-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.5);
}

.tools-btn i {
    font-size: 0.875rem;
}

/* ===== Side Panel - Glassmorphism ===== */
.side-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: var(--side-panel-width);
    height: 100vh;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--border-light);
    z-index: 1001;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.side-panel.open {
    transform: translateX(0);
}

.side-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.side-panel-header h2 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.side-panel-header h2 i {
    color: var(--primary-light);
}

.close-panel-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    transition: var(--transition);
}

.close-panel-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tools-grid {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tool-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: transparent;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.tool-card:hover {
    background: var(--bg-hover);
}

.tool-card.active {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--border-accent);
}

.tool-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    color: var(--accent);
}

.tool-card:hover .tool-icon,
.tool-card.active .tool-icon {
    background: var(--gradient-primary);
    color: white;
}

.tool-info h3 {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 2px;
}

.tool-info p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Overlay */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
    transition: var(--transition);
    backdrop-filter: blur(4px);
}

.overlay.show {
    opacity: 1;
    visibility: visible;
}

/* ===== Chat Container ===== */
.chat-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* ===== Welcome Screen - Gemini Style ===== */
.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 24px;
    animation: fadeUp 0.5s ease;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.welcome-icon {
    width: 72px;
    height: 72px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
    margin-bottom: 24px;
}

.welcome-screen h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-screen > p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 400px;
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 540px;
    width: 100%;
}

.quick-action {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--surface-glass);
    border: 1px solid var(--border-accent);
    border-radius: var(--border-radius-lg);
    color: var(--text-primary);
    font-size: 0.875rem;
    text-align: left;
    transition: var(--transition);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.quick-action:hover {
    background: var(--surface-glass-strong);
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-action i {
    width: 20px;
    color: var(--accent);
    font-size: 1rem;
}

/* ===== Messages - Clean ChatGPT Style ===== */
.messages {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 24px 16px;
}

.message {
    display: flex;
    gap: 16px;
    padding: 24px 0;
    animation: messageIn 0.3s ease;
}

.message:not(:last-child) {
    border-bottom: 1px solid var(--border-light);
}

@keyframes messageIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
}

.message.user .message-avatar {
    background: var(--gradient-cta);
    color: white;
}

.message.assistant .message-avatar {
    background: var(--gradient-primary);
    color: white;
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message.user .message-content {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.message-header {
    display: none;
}

.message-bubble {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--text-primary);
}

.message.user .message-bubble {
    background: var(--bg-message-user);
    padding: 12px 16px;
    border-radius: var(--border-radius-lg);
    border-bottom-right-radius: var(--border-radius-sm);
    max-width: 85%;
}

.message.assistant .message-bubble {
    background: transparent;
}

/* Message Meta (Time & Tokens) */
.message-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

.message-time {
    display: flex;
    align-items: center;
    gap: 4px;
}

.message-tokens {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    background: rgba(14, 165, 233, 0.1);
    border-radius: var(--border-radius-full);
    color: var(--accent);
}

.message-tokens i {
    font-size: 0.6rem;
}

/* Message Actions */
.message-actions {
    display: flex;
    gap: 4px;
    margin-top: 8px;
    opacity: 0;
    transition: opacity var(--transition);
}

.message:hover .message-actions {
    opacity: 1;
}

.message-action-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    color: var(--text-tertiary);
    font-size: 0.75rem;
    transition: var(--transition);
}

.message-action-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Images */
.message-image {
    max-width: 280px;
    margin-bottom: 12px;
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.message-image img {
    width: 100%;
    display: block;
}

/* ===== Markdown Styles ===== */
.message-bubble h1, .message-bubble h2, .message-bubble h3,
.message-bubble h4, .message-bubble h5, .message-bubble h6 {
    margin: 20px 0 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.message-bubble h1 { font-size: 1.375rem; }
.message-bubble h2 { font-size: 1.25rem; }
.message-bubble h3 { font-size: 1.125rem; }

.message-bubble p {
    margin: 12px 0;
}

.message-bubble p:first-child {
    margin-top: 0;
}

.message-bubble ul, .message-bubble ol {
    margin: 12px 0;
    padding-left: 24px;
}

.message-bubble li {
    margin: 6px 0;
}

.message-bubble code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
}

.message-bubble pre {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    margin: 16px 0;
    overflow: hidden;
    border: 1px solid var(--border);
}

.message-bubble pre code {
    display: block;
    padding: 16px;
    overflow-x: auto;
    background: transparent;
    font-size: 0.8125rem;
    line-height: 1.6;
}

.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.code-language {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-tertiary);
}

.copy-code-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: transparent;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.7rem;
    transition: var(--transition);
}

.copy-code-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.message-bubble blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--text-secondary);
    font-style: italic;
}

.message-bubble table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 0.875rem;
}

.message-bubble th, .message-bubble td {
    padding: 10px 14px;
    border: 1px solid var(--border);
    text-align: left;
}

.message-bubble th {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.message-bubble a {
    color: var(--accent);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 4px 0;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--text-tertiary);
    border-radius: 50%;
    animation: typing 1.4s ease infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-4px); opacity: 1; }
}

/* Streaming Cursor */
.cursor {
    display: inline;
    animation: blink 1s infinite;
    color: var(--accent);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ===== Input Area - Modern Floating ===== */
.input-area {
    padding: 16px 16px 24px;
    background: linear-gradient(to top, var(--bg-primary) 80%, transparent);
    position: sticky;
    bottom: 0;
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    max-width: var(--max-width);
    margin: 0 auto;
    background: var(--surface-glass);
    border: 1px solid var(--border-accent);
    border-radius: var(--border-radius-xl);
    padding: 8px 8px 8px 16px;
    transition: var(--transition);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.input-container:focus-within {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-glow);
}

.input-actions-left {
    display: flex;
    align-items: center;
}

.input-action-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.input-action-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.input-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.image-preview-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-bottom: 8px;
}

.image-preview-container:empty {
    display: none;
    padding: 0;
}

.image-preview {
    position: relative;
    width: 64px;
    height: 64px;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.remove-image-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 18px;
    height: 18px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    color: white;
    font-size: 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.remove-image-btn:hover {
    background: #ef4444;
}

#messageInput {
    width: 100%;
    min-height: 24px;
    max-height: 160px;
    padding: 8px 0;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.9375rem;
    line-height: 1.5;
    resize: none;
}

#messageInput::placeholder {
    color: var(--text-tertiary);
}

.input-actions-right {
    display: flex;
    align-items: center;
}

.send-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-cta);
    border-radius: var(--border-radius-md);
    color: white;
    font-size: 0.9rem;
    transition: var(--transition);
    opacity: 0.4;
    box-shadow: var(--shadow-btn);
}

.send-btn:not(:disabled) {
    opacity: 1;
}

.send-btn:not(:disabled):hover {
    background: var(--gradient-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

.input-footer {
    text-align: center;
    margin-top: 12px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* ===== Modal - Clean ===== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    backdrop-filter: blur(4px);
    padding: 16px;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    width: 100%;
    max-width: 440px;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-accent);
    border-radius: var(--border-radius-lg);
    transform: scale(0.95) translateY(10px);
    transition: transform 0.2s ease;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.modal.show .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-header h2 i {
    color: var(--primary-light);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

/* Settings */
.setting-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-group label {
    font-weight: 500;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.setting-group label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
}

.setting-group input[type="text"],
.setting-group input[type="password"],
.setting-group input[type="number"] {
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.setting-group input:focus {
    border-color: var(--accent);
}

.setting-group input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

.setting-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.api-key-input {
    display: flex;
    gap: 8px;
}

.api-key-input input {
    flex: 1;
}

/* Protected API Key - blur and prevent interaction */
.api-key-input.api-key-protected input {
    filter: blur(4px);
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    pointer-events: none;
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
}

.api-key-input.api-key-protected:hover input {
    filter: blur(6px);
}

.toggle-visibility {
    width: 40px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    transition: var(--transition);
}

.toggle-visibility:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* Buttons */
.btn-primary, .btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

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

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-hover);
}

/* ===== Tool Interface Modal - Bottom Sheet Style ===== */
.tool-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.tool-modal.active {
    opacity: 1;
    visibility: visible;
}

.tool-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.tool-modal-sheet {
    position: relative;
    width: 100%;
    max-width: 560px;
    max-height: 85vh;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-radius: 24px 24px 0 0;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
    box-shadow: 0 -10px 50px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.tool-modal.active .tool-modal-sheet {
    transform: translateY(0);
}

.tool-sheet-handle {
    width: 40px;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin: 12px auto 0;
    opacity: 0.5;
}

.tool-sheet-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
}

.tool-badge {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
    background: var(--tool-gradient, linear-gradient(135deg, #10B981 0%, #059669 100%));
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    flex-shrink: 0;
}

.tool-header-text {
    flex: 1;
    min-width: 0;
}

.tool-header-text h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.tool-header-text p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin: 4px 0 0;
}

.tool-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.tool-fullscreen-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

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

.tool-close-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.tool-close-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tool-sheet-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Tool Content Wrapper - for side-by-side layout */
.tool-content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex: 1;
}

.tool-input-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tool-output-panel {
    display: flex;
    flex-direction: column;
}

/* Hide empty state by default (only shown on desktop for translator) */
.tool-output-empty {
    display: none;
}

.tool-output-empty.hidden {
    display: none !important;
}

.tool-input-box {
    background: var(--bg-tertiary);
    border-radius: 16px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
}

.tool-input-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.tool-input-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    background: rgba(0,0,0,0.1);
}

.tool-input-header-actions {
    display: flex;
    gap: 4px;
}

.tool-upload-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, #3B82F6 0%, #1D4ED8 100%);
    border: none;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.tool-upload-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.tool-upload-btn.hidden {
    display: none;
}

.tool-upload-btn.has-image {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
}

.tool-input-box textarea {
    width: 100%;
    min-height: 100px;
    max-height: 200px;
    padding: 14px 16px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    resize: none;
}

.tool-input-box textarea:focus {
    outline: none;
}

.tool-input-box textarea::placeholder {
    color: var(--text-tertiary);
}

.tool-input-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 8px 14px;
    border-top: 1px solid var(--border);
    background: rgba(0,0,0,0.1);
}

.tool-char-badge {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.tool-input-actions {
    display: flex;
    gap: 4px;
}

.tool-micro-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.tool-micro-btn:hover {
    background: var(--bg-hover);
    color: var(--accent);
}

.tool-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    overflow: hidden;
}

.tool-option-group {
    flex: 1;
    min-width: 140px;
}

.tool-option-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.tool-option-select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.tool-option-select:focus {
    outline: none;
    border-color: var(--accent);
}

/* Language Selector for Translate Tool */
.tool-lang-section {
    margin-bottom: 16px;
}

.tool-lang-section:last-child {
    margin-bottom: 0;
}

.tool-lang-category {
    margin-bottom: 10px;
}

.tool-lang-category-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.tool-lang-category-badge.indian {
    background: linear-gradient(135deg, #FF9933 0%, #FF6B00 100%);
    color: white;
}

.tool-lang-category-badge.world {
    background: linear-gradient(135deg, #3B82F6 0%, #1D4ED8 100%);
    color: white;
}

.tool-lang-category-badge .flag-icon {
    font-size: 0.9rem;
}

.tool-lang-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tool-lang-section {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.tool-lang-scroll {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    max-width: 100%;
    width: 100%;
}

.tool-lang-scroll::-webkit-scrollbar {
    display: none;
}

.tool-lang-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 25px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.tool-lang-pill .flag-icon,
.tool-lang-pill .lang-icon {
    font-size: 1rem;
}

.tool-lang-pill .lang-icon {
    font-family: 'Noto Sans Devanagari', sans-serif;
    font-weight: 700;
    color: #FF9933;
}

.tool-lang-pill:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    color: var(--text-primary);
}

.tool-lang-pill.active {
    background: linear-gradient(135deg, #3B82F6 0%, #1D4ED8 100%);
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.tool-lang-pill.active .lang-icon {
    color: white;
}

/* Tool Mode Buttons */
.tool-modes {
    display: none;
}

.tool-modes.active {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tool-mode-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tool-mode-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tool-mode-btn {
    flex: 1;
    min-width: calc(50% - 4px);
    padding: 12px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-mode-btn i {
    font-size: 0.9rem;
    opacity: 0.7;
}

.tool-mode-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    color: var(--text-primary);
}

.tool-mode-btn.active {
    background: var(--tool-gradient, linear-gradient(135deg, #10B981 0%, #059669 100%));
    border-color: transparent;
    color: white;
}

.tool-mode-btn.active i {
    opacity: 1;
}

/* Tool Image Preview */
.tool-image-preview {
    display: none;
    padding: 10px 14px;
    border-top: 1px solid var(--border);
}

.tool-image-preview.active {
    display: flex;
    align-items: center;
    gap: 10px;
}

.tool-image-preview img {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
}

.tool-image-preview .preview-info {
    flex: 1;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.tool-image-preview .preview-remove {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: rgba(239, 68, 68, 0.2);
    border: none;
    color: #EF4444;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.8rem;
}

/* Tool Output Section */
.tool-output-section {
    display: none;
    background: var(--bg-tertiary);
    border-radius: 16px;
    border: 1px solid var(--border);
    overflow: hidden;
}

.tool-output-section.active {
    display: block;
}

.tool-output-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: rgba(16, 185, 129, 0.1);
}

.tool-output-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #10B981;
}

.tool-output-label i {
    font-size: 0.9rem;
}

.tool-output-actions {
    display: flex;
    gap: 4px;
}

.tool-output-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
}

.tool-output-btn:hover {
    background: var(--bg-hover);
    color: var(--accent);
}

.tool-output-content {
    padding: 16px;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.7;
    max-height: 400px;
    overflow-y: auto;
}

.tool-output-content p {
    margin-bottom: 12px;
}

.tool-output-content p:last-child {
    margin-bottom: 0;
}

.tool-output-content strong {
    color: var(--accent);
    font-weight: 600;
}

.tool-output-content h1,
.tool-output-content h2,
.tool-output-content h3 {
    color: var(--text-primary);
    margin: 16px 0 8px 0;
    font-weight: 600;
}

.tool-output-content h1:first-child,
.tool-output-content h2:first-child,
.tool-output-content h3:first-child {
    margin-top: 0;
}

.tool-output-content ul,
.tool-output-content ol {
    padding-left: 20px;
    margin: 8px 0;
}

.tool-output-content li {
    margin-bottom: 4px;
}

.tool-output-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 12px;
    margin: 12px 0;
    color: var(--text-secondary);
    font-style: italic;
}

/* Translation Result Styling */
.translation-result {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.translation-block {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid var(--border);
}

.translation-block-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-tertiary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.translation-block-label i {
    font-size: 0.7rem;
}

.translation-block-content {
    font-size: 1.1rem;
    color: var(--text-primary);
    line-height: 1.6;
    word-break: break-word;
}

.translation-block.translated {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
}

.translation-block.translated .translation-block-label {
    color: #3B82F6;
}

.translation-block.translated .translation-block-content {
    font-size: 1.5rem;
    font-weight: 600;
    color: #60A5FA;
    line-height: 1.8;
}

.translation-block.transliteration {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

.translation-block.transliteration .translation-block-label {
    color: #10B981;
}

.translation-block.transliteration .translation-block-content {
    font-size: 1.1rem;
    font-style: italic;
    color: #34D399;
}
/* Translation Animation */
.translation-result {
    animation: fadeInUp 0.4s ease-out;
}

.translation-block {
    animation: fadeInUp 0.4s ease-out;
    animation-fill-mode: both;
}

.translation-block:nth-child(1) { animation-delay: 0s; }
.translation-block:nth-child(2) { animation-delay: 0.1s; }
.translation-block:nth-child(3) { animation-delay: 0.2s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tool-output-content pre {
    background: var(--bg-primary);
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 12px 0;
}

.tool-output-content code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.tool-output-loading {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.tool-output-loading .spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Tool Submit Button */

.tool-sheet-footer {
    padding: 16px 20px 24px;
    background: transparent;
}

.tool-go-btn {
    width: 100%;
    padding: 16px 24px;
    border: none;
    border-radius: 14px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--tool-gradient, linear-gradient(135deg, #10B981 0%, #059669 100%));
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.35);
}

.tool-go-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(16, 185, 129, 0.45);
}

.tool-go-btn:active {
    transform: scale(0.98);
}

.tool-go-btn i {
    transition: transform 0.2s ease;
}

.tool-go-btn:hover i {
    transform: translateX(4px);
}

/* Tool Colors */
.tool-modal[data-tool="grammar"] { --tool-gradient: linear-gradient(135deg, #10B981 0%, #059669 100%); --tool-shadow: rgba(16, 185, 129, 0.35); }
.tool-modal[data-tool="code"] { --tool-gradient: linear-gradient(135deg, #8B5CF6 0%, #6D28D9 100%); --tool-shadow: rgba(139, 92, 246, 0.35); }
.tool-modal[data-tool="math"] { --tool-gradient: linear-gradient(135deg, #F59E0B 0%, #D97706 100%); --tool-shadow: rgba(245, 158, 11, 0.35); }
.tool-modal[data-tool="translate"] { --tool-gradient: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%); --tool-shadow: rgba(59, 130, 246, 0.35); }
.tool-modal[data-tool="essay"] { --tool-gradient: linear-gradient(135deg, #EC4899 0%, #DB2777 100%); --tool-shadow: rgba(236, 72, 153, 0.35); }
.tool-modal[data-tool="paraphrase"] { --tool-gradient: linear-gradient(135deg, #06B6D4 0%, #0891B2 100%); --tool-shadow: rgba(6, 182, 212, 0.35); }
.tool-modal[data-tool="humanize"] { --tool-gradient: linear-gradient(135deg, #F97316 0%, #EA580C 100%); --tool-shadow: rgba(249, 115, 22, 0.35); }
.tool-modal[data-tool="summarize"] { --tool-gradient: linear-gradient(135deg, #14B8A6 0%, #0D9488 100%); --tool-shadow: rgba(20, 184, 166, 0.35); }
.tool-modal[data-tool="email"] { --tool-gradient: linear-gradient(135deg, #EF4444 0%, #DC2626 100%); --tool-shadow: rgba(239, 68, 68, 0.35); }
.tool-modal[data-tool="creative"] { --tool-gradient: linear-gradient(135deg, #A855F7 0%, #9333EA 100%); --tool-shadow: rgba(168, 85, 247, 0.35); }
.tool-modal[data-tool="social"] { --tool-gradient: linear-gradient(135deg, #0EA5E9 0%, #0284C7 100%); --tool-shadow: rgba(14, 165, 233, 0.35); }
.tool-modal[data-tool="cover"] { --tool-gradient: linear-gradient(135deg, #22D3EE 0%, #06B6D4 100%); --tool-shadow: rgba(34, 211, 238, 0.35); }
.tool-modal[data-tool="explain"] { --tool-gradient: linear-gradient(135deg, #FBBF24 0%, #F59E0B 100%); --tool-shadow: rgba(251, 191, 36, 0.35); }
.tool-modal[data-tool="image"] { --tool-gradient: linear-gradient(135deg, #E879F9 0%, #D946EF 100%); --tool-shadow: rgba(232, 121, 249, 0.35); }

.tool-modal[data-tool] .tool-badge,
.tool-modal[data-tool] .tool-go-btn {
    background: var(--tool-gradient);
    box-shadow: 0 4px 20px var(--tool-shadow);
}

/* Desktop styles */
@media (min-width: 640px) {
    .tool-modal-sheet {
        border-radius: 24px;
        margin: auto;
        max-height: 80vh;
    }
    
    .tool-modal.active .tool-modal-sheet {
        transform: translateY(0) scale(1);
    }
    
    .tool-sheet-handle {
        display: none;
    }
    
    .tool-mode-btn {
        min-width: calc(25% - 6px);
    }
}

/* Side-by-side layout for ALL tools on large screens */
@media (min-width: 900px) {
    .tool-modal-sheet {
        max-width: 900px;
        width: 95%;
    }
    
    .tool-content-wrapper {
        display: flex;
        flex-direction: row;
        gap: 20px;
        flex: 1;
        min-height: 350px;
    }
    
    .tool-input-panel {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 16px;
        min-width: 0;
    }
    
    .tool-input-box {
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    
    .tool-input-box textarea {
        flex: 1;
        min-height: 150px;
        max-height: none;
    }
    
    .tool-output-panel {
        flex: 1;
        display: flex;
        flex-direction: column;
        min-width: 0;
    }
    
    .tool-output-section {
        display: flex;
        flex-direction: column;
        flex: 1;
    }
    
    .tool-output-section.active {
        display: flex;
    }
    
    .tool-output-section.active + .tool-output-empty {
        display: none;
    }
    
    .tool-output-content {
        flex: 1;
        max-height: none;
    }
    
    .tool-output-empty {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        background: var(--bg-tertiary);
        border-radius: 16px;
        border: 1px dashed var(--border);
        color: var(--text-tertiary);
        gap: 12px;
        padding: 40px 20px;
    }
    
    .tool-output-empty-icon {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: rgba(59, 130, 246, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--accent);
        font-size: 1.2rem;
        animation: pulseArrow 2s ease-in-out infinite;
    }
    
    @keyframes pulseArrow {
        0%, 100% { transform: translateX(0); opacity: 0.6; }
        50% { transform: translateX(-5px); opacity: 1; }
    }
    
    .tool-output-empty p {
        font-size: 0.9rem;
        text-align: center;
        max-width: 200px;
        line-height: 1.5;
    }
    
    .tool-output-section.active ~ .tool-output-empty {
        display: none;
    }
}

/* Fullscreen mode for tool modal */
.tool-modal.fullscreen .tool-modal-sheet {
    max-width: 100%;
    width: 100%;
    height: 100vh;
    max-height: 100vh;
    border-radius: 0;
    margin: 0;
}

.tool-modal.fullscreen .tool-sheet-body {
    flex: 1;
}

.tool-modal.fullscreen .tool-content-wrapper {
    display: flex;
    flex-direction: row;
    gap: 24px;
    flex: 1;
    min-height: 0;
}

.tool-modal.fullscreen .tool-input-panel,
.tool-modal.fullscreen .tool-output-panel {
    flex: 1;
    min-width: 0;
}

.tool-modal.fullscreen .tool-input-box {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tool-modal.fullscreen .tool-input-box textarea {
    flex: 1;
    min-height: 200px;
    max-height: none;
}

.tool-modal.fullscreen .tool-output-section {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tool-modal.fullscreen .tool-output-content {
    flex: 1;
    max-height: none;
    overflow-y: auto;
}

.tool-modal.fullscreen .tool-output-empty {
    flex: 1;
    display: flex;
}

/* Mobile - hide fullscreen button */
@media (max-width: 640px) {
    .tool-fullscreen-btn {
        display: none;
    }
}

/* Mobile tool modes */
@media (max-width: 480px) {
    .tool-mode-btn {
        min-width: calc(50% - 4px);
        padding: 10px 12px;
        font-size: 0.8rem;
    }
    
    .tool-mode-btn i {
        font-size: 0.85rem;
    }
    
    .tool-upload-box {
        padding: 12px 14px;
    }
    
    .tool-upload-icon {
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }
    
    .tool-lang-pill {
        padding: 8px 12px;
        font-size: 0.8rem;
    }
    
    .tool-lang-category-badge {
        padding: 5px 10px;
        font-size: 0.75rem;
    }
}

/* ===== Toast ===== */
.toast-container {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 3000;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease;
    white-space: nowrap;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.toast.success { border-left: 3px solid #22c55e; }
.toast.error { border-left: 3px solid #ef4444; }
.toast.warning { border-left: 3px solid #f59e0b; }
.toast.info { border-left: 3px solid var(--accent); }

.toast-icon {
    font-size: 0.9rem;
}

.toast.success .toast-icon { color: #22c55e; }
.toast.error .toast-icon { color: #ef4444; }
.toast.warning .toast-icon { color: #f59e0b; }
.toast.info .toast-icon { color: var(--accent); }

.toast-message {
    font-size: 0.875rem;
}

.toast-close {
    color: var(--text-tertiary);
    font-size: 0.75rem;
    padding: 4px;
    margin-left: 4px;
    transition: var(--transition);
}

.toast-close:hover {
    color: var(--text-primary);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .app-container {
        margin-left: 0;
    }
    
    .left-panel {
        transform: translateX(-100%);
    }
    
    .left-panel.open {
        transform: translateX(0);
    }
    
    .menu-btn {
        display: flex;
    }
}

@media (max-width: 768px) {
    :root {
        --side-panel-width: 100%;
        --max-width: 100%;
    }
    
    .header-center {
        position: static;
        transform: none;
    }
    
    .logo-text {
        display: none;
    }
    
    .welcome-screen h1 {
        font-size: 1.5rem;
    }
    
    .welcome-icon {
        width: 56px;
        height: 56px;
        font-size: 24px;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
    
    .message {
        padding: 16px 0;
    }
    
    .messages {
        padding: 16px 12px;
    }
    
    .input-container {
        border-radius: var(--border-radius-lg);
    }
    
    .left-panel {
        width: 280px;
    }
}

@media (max-width: 480px) {
    .model-btn span {
        display: none;
    }
    
    .model-btn {
        padding: 8px 10px;
    }
    
    .left-panel {
        width: 100%;
    }
}

/* Small Modal */
.modal-content.modal-sm {
    max-width: 360px;
}

/* ===== Tool Modal Responsive ===== */
@media (max-width: 600px) {
    .tool-modal-content {
        max-width: 100%;
    }
    
    .tool-modal-header {
        padding: 12px 16px;
    }
    
    .tool-modal-body {
        padding: 16px;
    }
    
    .tool-quick-actions {
        gap: 8px;
    }
    
    .tool-quick-btn {
        padding: 12px 8px;
    }
    
    .tool-quick-btn span {
        font-size: 0.75rem;
    }
    
    .tool-textarea {
        min-height: 150px;
        font-size: 16px; /* Prevents iOS zoom */
    }
    
    .tool-modal-footer {
        padding: 12px 16px;
    }
    
    .tool-submit-btn {
        padding: 14px 20px;
    }
}

/* ===== Print ===== */
@media print {
    .app-header, .input-area, .side-panel, .left-panel, .overlay, .modal, .toast-container, .left-panel-overlay, .chat-context-menu, .tool-modal {
        display: none !important;
    }
    
    .app-container {
        margin-left: 0 !important;
    }
    
    .chat-container {
        overflow: visible;
        height: auto;
    }
}

/* ===== Additional Helpers ===== */
.message-name {
    display: none;
}

.message-header {
    display: none;
}