:root {
    --bg-main: #0a0e17;
    --bg-card: #121824;
    --bg-secondary: #1a2233;
    --bg-hover: #222d42;
    --border-color: #263248;
    --border-light: #33425f;
    --accent: #10b981;
    --accent-hover: #059669;
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-cyan: #06b6d4;
    --danger: #ef4444;
    --warning: #f59e0b;
    --text-main: #cbd5e1;
    --text-muted: #8493a8;
    --text-bright: #f8fafc;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --header-height: 54px;
    --sidebar-width: 280px;
    --bottom-nav-height: 56px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    height: 100dvh;
    width: 100%;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    overflow: hidden;
    overscroll-behavior: none;
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-family);
    user-select: none;
    -webkit-user-select: none;
    -webkit-text-size-adjust: 100%;
}

/* App Layout */
.app-layout {
    display: flex;
    height: 100%;
    height: 100dvh;
    width: 100%;
    position: relative;
    overflow: hidden;
}

/* Sidebar Backdrop for Mobile */
.sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 40;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

/* Sessions Sidebar */
.sessions-sidebar {
    width: var(--sidebar-width);
    height: 100%;
    background-color: var(--bg-card);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 30;
    transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.2s ease;
    flex-shrink: 0;
    overflow: hidden;
}

/* Desktop Collapsed State */
.sessions-sidebar.collapsed {
    width: 0 !important;
    min-width: 0 !important;
    border-right: none;
    pointer-events: none;
    opacity: 0;
}

.sidebar-header {
    padding: 12px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.sidebar-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-bright);
}

.sidebar-title i {
    width: 18px;
    height: 18px;
    color: var(--accent-blue);
}

.sidebar-close-btn {
    display: none;
}

.new-session-btn {
    padding: 5px 10px;
    font-size: 0.8rem;
}

.sidebar-search {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
}

.search-input-wrapper i {
    width: 15px;
    height: 15px;
    color: var(--text-muted);
}

.search-input-wrapper input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-bright);
    font-size: 0.85rem;
    width: 100%;
}

.sessions-list {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.empty-sessions {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 36px 16px;
    color: var(--text-muted);
    font-size: 0.85rem;
    gap: 8px;
}

.session-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    border-left: 3px solid transparent;
}

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

.session-card.active {
    background: var(--bg-secondary);
    border-left-color: var(--accent-blue);
}

.session-card-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.session-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
}

.session-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-bright);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-date {
    font-size: 0.7rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

.session-preview-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
}

.session-preview {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-msg-badge {
    font-size: 0.65rem;
    padding: 2px 5px;
    background: var(--bg-main);
    border-radius: 8px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.session-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    opacity: 0;
    transition: opacity 0.15s;
}

.session-card:hover .session-actions {
    opacity: 1;
}

.session-action-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 4px;
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.session-action-btn.btn-del:hover {
    color: var(--danger);
}

.session-action-btn i {
    width: 14px;
    height: 14px;
}

.sidebar-footer {
    padding: 10px 14px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-card);
    flex-shrink: 0;
}

.workspace-info {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.workspace-info i {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* App Body */
.app-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100%;
    height: 100dvh;
    position: relative;
    overflow: hidden;
}

/* Header */
.app-header {
    height: var(--header-height);
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    z-index: 10;
    flex-shrink: 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-bright);
}

.logo-icon {
    font-size: 1.2rem;
}

.logo b {
    color: var(--accent-blue);
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.72rem;
    padding: 3px 7px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-muted);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--warning);
}

.status-badge.connected .status-dot {
    background-color: var(--accent);
    box-shadow: 0 0 6px var(--accent);
}

.status-badge.disconnected .status-dot {
    background-color: var(--danger);
}

/* Navigation Tabs (Desktop) */
.nav-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-main);
    padding: 3px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.nav-tab {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 6px 12px;
    font-size: 0.85rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-tab i {
    width: 16px;
    height: 16px;
}

.nav-tab.active {
    background: var(--bg-secondary);
    color: var(--text-bright);
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: var(--bg-secondary);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s ease-in-out;
}

.btn i {
    width: 15px;
    height: 15px;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 0.8rem;
}

.btn:active {
    transform: scale(0.96);
}

.btn-action {
    background: var(--accent);
    color: #ffffff;
    border-color: rgba(255,255,255,0.1);
}

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

.btn-danger {
    background: var(--danger);
    color: #ffffff;
    border: none;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-warning {
    background: #873800;
    color: #ffffff;
}

.btn-outline {
    background: transparent;
    border: 1px dashed var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-blue);
}

.btn-primary {
    background: var(--accent-blue);
    color: #fff;
    border: none;
}

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

.btn-block {
    width: 100%;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.icon-btn i {
    width: 18px;
    height: 18px;
}

.icon-btn:hover, .icon-btn:active {
    background: var(--bg-secondary);
    color: var(--text-bright);
}

/* Main Content Area */
.main-content {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.tab-pane {
    display: none;
    flex: 1;
    min-height: 0;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.tab-pane.active {
    display: flex;
}

/* 💬 Chat Tab */
.chat-header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.active-session-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-bright);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-messages-container {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
}

/* Welcome Screen */
.chat-welcome {
    margin: auto;
    max-width: 580px;
    text-align: center;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.welcome-icon {
    font-size: 2.8rem;
    filter: drop-shadow(0 0 16px rgba(59, 130, 246, 0.4));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.chat-welcome h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-bright);
}

.chat-welcome p {
    font-size: 0.88rem;
    color: var(--text-muted);
    max-width: 440px;
}

.welcome-suggestions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
    width: 100%;
    margin-top: 14px;
}

.suggestion-chip {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    color: var(--text-main);
    font-size: 0.82rem;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.suggestion-chip i {
    width: 16px;
    height: 16px;
    color: var(--accent-blue);
    flex-shrink: 0;
}

.suggestion-chip:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    color: var(--text-bright);
}

/* Chat Message Rows */
.chat-message-row {
    display: flex;
    gap: 10px;
    width: 100%;
    max-width: 860px;
    margin: 0 auto;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.chat-message-row.is-user .message-avatar {
    background: var(--accent-blue);
    color: #fff;
    border: none;
}

.chat-message-row.is-user .message-avatar i {
    width: 18px;
    height: 18px;
}

.message-bubble {
    max-width: calc(100% - 46px);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.message-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.72rem;
    color: var(--text-muted);
    padding: 0 4px;
}

.chat-message-row.is-user .message-meta {
    justify-content: flex-end;
}

.message-author {
    font-weight: 600;
    color: var(--text-bright);
}

.msg-copy-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px;
    opacity: 0;
    transition: opacity 0.15s;
    display: flex;
    align-items: center;
}

.chat-message-row:hover .msg-copy-btn {
    opacity: 1;
}

.msg-copy-btn i {
    width: 13px;
    height: 13px;
}

.msg-copy-btn:hover {
    color: var(--text-bright);
}

.message-body {
    padding: 12px 14px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    line-height: 1.55;
    user-select: text;
    -webkit-user-select: text;
    word-break: break-word;
}

.chat-message-row.is-user .message-body {
    background: linear-gradient(135deg, #1e3a8a, #2563eb);
    color: #ffffff;
    border-bottom-right-radius: 2px;
}

.chat-message-row.is-assistant .message-body {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-bottom-left-radius: 2px;
}

/* Markdown Styling */
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
    color: var(--text-bright);
    margin-top: 12px;
    margin-bottom: 6px;
    font-weight: 600;
}

.markdown-body p {
    margin-bottom: 8px;
}

.markdown-body p:last-child {
    margin-bottom: 0;
}

.markdown-body ul, .markdown-body ol {
    margin-left: 18px;
    margin-bottom: 8px;
}

.markdown-body li {
    margin-bottom: 3px;
}

.markdown-body code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    color: #93c5fd;
}

.markdown-body pre {
    position: relative;
    background: #0d1117;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    margin: 10px 0;
    overflow-x: auto;
}

.markdown-body pre code {
    background: transparent;
    padding: 0;
    color: inherit;
    font-size: 0.82rem;
}

.code-copy-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    background: rgba(30, 41, 59, 0.85);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.72rem;
    padding: 3px 7px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s;
}

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

.code-copy-btn i {
    width: 12px;
    height: 12px;
}

.typing-cursor {
    display: inline-block;
    width: 7px;
    height: 15px;
    background: var(--accent-blue);
    vertical-align: middle;
    margin-left: 3px;
    animation: blink 0.9s infinite;
}

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

/* Floating Scroll to Bottom Button */
.scroll-to-bottom-btn {
    position: absolute;
    bottom: 110px;
    right: 20px;
    background: var(--bg-card);
    border: 1px solid var(--accent-blue);
    color: var(--text-bright);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 25;
}

.scroll-to-bottom-btn i {
    width: 14px;
    height: 14px;
}

/* Quick Action Chips */
.chat-action-chips {
    display: flex;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-shrink: 0;
    width: 100%;
    box-sizing: border-box;
}

.chat-action-chips::-webkit-scrollbar {
    display: none;
}

.chip-btn {
    flex-shrink: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 5px 11px;
    border-radius: 14px;
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: all 0.15s;
}

.chip-btn i {
    width: 13px;
    height: 13px;
    color: var(--accent-blue);
}

.chip-btn:hover, .chip-btn:active {
    background: var(--bg-hover);
    color: var(--text-bright);
    border-color: var(--accent-blue);
}

/* 💻 Terminal Tab */
#terminal-wrapper {
    flex: 1;
    min-height: 0;
    background-color: #000000;
    position: relative;
    overflow: hidden;
    padding: 4px;
}

#terminal-container {
    width: 100%;
    height: 100%;
}

.quick-toolbar {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 6px 8px;
    z-index: 5;
    flex-shrink: 0;
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

.toolbar-scroll {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    width: 100%;
    box-sizing: border-box;
    padding: 2px 2px;
}

.toolbar-scroll::-webkit-scrollbar {
    display: none;
}

.toolbar-scroll button {
    flex-shrink: 0;
}

.toolbar-divider {
    width: 1px;
    background: var(--border-color);
    margin: 0 3px;
    flex-shrink: 0;
}

/* Input Panel */
.input-panel {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 8px 12px;
    flex-shrink: 0;
}

.input-form {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 4px 8px;
    max-width: 860px;
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

.input-form textarea {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    color: var(--text-bright);
    font-family: var(--font-family);
    font-size: 0.92rem;
    resize: none;
    outline: none;
    max-height: 140px;
    padding: 6px 0;
}

.btn-voice {
    color: var(--text-muted);
}

.btn-voice.recording {
    color: var(--danger);
    animation: pulse 1.2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.15); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

.btn-send {
    background: var(--accent-blue);
    color: #ffffff;
    border-radius: var(--radius-sm);
}

/* File Explorer Tab */
.files-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.breadcrumbs {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    overflow-x: auto;
    white-space: nowrap;
}

.crumb {
    color: var(--accent-blue);
    cursor: pointer;
}

.files-body {
    flex: 1;
    min-height: 0;
    display: flex;
    overflow: hidden;
    position: relative;
}

.file-list {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 8px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s;
    font-size: 0.88rem;
}

.file-item:hover, .file-item:active {
    background: var(--bg-secondary);
}

.file-item.is-dir {
    color: var(--accent-blue);
    font-weight: 500;
}

.file-viewer {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-main);
    display: flex;
    flex-direction: column;
    z-index: 20;
}

.viewer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    flex-shrink: 0;
}

.file-viewer pre {
    flex: 1;
    min-height: 0;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    padding: 12px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #e6edf3;
    user-select: text;
    -webkit-user-select: text;
}

/* Quick Prompts Tab */
.prompts-container {
    padding: 16px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    flex: 1;
    min-height: 0;
}

.prompts-container h3 {
    color: var(--text-bright);
    margin-bottom: 4px;
}

.prompts-container .subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.prompt-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
}

.prompt-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.prompt-card:hover, .prompt-card:active {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.prompt-card h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-bright);
    font-size: 0.92rem;
    margin-bottom: 6px;
}

.prompt-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ⚙️ Settings Section Layout */
.settings-layout {
    display: flex;
    flex: 1;
    min-height: 0;
    height: 100%;
    overflow: hidden;
}

.settings-nav {
    width: 210px;
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 12px 8px;
    gap: 4px;
    flex-shrink: 0;
}

.settings-sub-tab {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.84rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-align: left;
}

.settings-sub-tab i {
    width: 16px;
    height: 16px;
}

.settings-sub-tab:hover {
    background: var(--bg-secondary);
    color: var(--text-bright);
}

.settings-sub-tab.active {
    background: var(--bg-secondary);
    color: var(--accent-blue);
    font-weight: 600;
}

.settings-content {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 18px 22px;
}

.settings-section {
    display: none;
    flex-direction: column;
    gap: 16px;
    max-width: 900px;
}

.settings-section.active {
    display: flex;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.section-header h3 {
    font-size: 1.15rem;
    color: var(--text-bright);
    margin-bottom: 3px;
}

.section-header p {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.settings-card h4 {
    font-size: 0.92rem;
    color: var(--text-bright);
    font-weight: 600;
}

.card-desc {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* Models Grid & Radio Cards */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 10px;
}

.model-select-card {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    cursor: pointer;
    transition: all 0.15s;
}

.model-select-card:hover {
    border-color: var(--accent-blue);
    background: var(--bg-hover);
}

.model-select-card.selected {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.12);
}

.model-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.model-title-row {
    display: flex;
    align-items: center;
    gap: 5px;
    flex-wrap: wrap;
}

.model-name {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-bright);
}

.model-provider-badge {
    font-size: 0.65rem;
    padding: 2px 5px;
    border-radius: 4px;
    background: var(--bg-main);
    color: var(--accent-cyan);
    font-weight: 500;
}

.model-tag-badge {
    font-size: 0.65rem;
    padding: 2px 5px;
    border-radius: 4px;
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.model-id {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.effort-control-row {
    max-width: 420px;
}

/* Forms & Inputs */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 10px;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-main);
}

.form-group input, .form-group textarea, .form-select {
    width: 100%;
    padding: 8px 11px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-bright);
    font-size: 0.86rem;
    outline: none;
    font-family: inherit;
}

.form-group textarea {
    font-family: var(--font-mono);
    resize: vertical;
}

.form-group input:focus, .form-group textarea:focus, .form-select:focus {
    border-color: var(--accent-blue);
}

/* Toggle Switches */
.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 6px 0;
}

.toggle-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.toggle-label {
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--text-bright);
}

.toggle-desc {
    font-size: 0.76rem;
    color: var(--text-muted);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    transition: .3s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-muted);
    transition: .3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
}

input:checked + .slider:before {
    transform: translateX(20px);
    background-color: #ffffff;
}

/* MCP Servers Section */
.mcp-templates-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mcp-templates-container h4 {
    font-size: 0.82rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mcp-templates-chips {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.chip-template {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-main);
    padding: 5px 11px;
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.15s;
}

.chip-template i {
    width: 14px;
    height: 14px;
    color: var(--accent-blue);
}

.chip-template:hover {
    border-color: var(--accent-blue);
    background: var(--bg-hover);
    color: var(--text-bright);
}

.mcp-list, .skills-list, .plugins-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mcp-card, .skill-card, .plugin-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mcp-card-header, .skill-card-header, .plugin-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.mcp-card-title, .skill-card-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.mcp-name, .skill-name, .plugin-name {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-bright);
}

.mcp-type-badge, .skill-source-badge {
    font-size: 0.68rem;
    padding: 2px 6px;
    background: var(--bg-secondary);
    border-radius: 4px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.mcp-status-badge {
    font-size: 0.68rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

.mcp-status-badge.active {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent);
}

.mcp-status-badge.inactive {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

.mcp-command-box {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    overflow-x: auto;
}

.skill-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.skill-card-footer {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.skill-card-footer i {
    width: 13px;
    height: 13px;
}

.empty-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 36px 16px;
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    text-align: center;
    gap: 8px;
}

.empty-placeholder i {
    width: 30px;
    height: 30px;
    color: var(--text-muted);
}

.empty-placeholder .subtext {
    font-size: 0.78rem;
    max-width: 380px;
}

/* Modals */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.75);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 16px;
}

.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    max-width: 380px;
    width: 100%;
    padding: 22px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-card.modal-lg {
    max-width: 580px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-bright);
    margin-bottom: 12px;
}

.close-modal-btn {
    margin-left: auto;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 16px;
}

.skill-code-pre {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px;
    max-height: 380px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-main);
    user-select: text;
    -webkit-user-select: text;
}

.error-text {
    color: var(--danger);
    font-size: 0.8rem;
    margin-top: 8px;
}

.hidden {
    display: none !important;
}

/* 📱 Mobile Bottom Navigation Bar */
.mobile-bottom-nav {
    display: none;
    height: var(--bottom-nav-height);
    background: rgba(18, 24, 36, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-color);
    padding-bottom: env(safe-area-inset-bottom);
    box-sizing: content-box;
    z-index: 35;
    justify-content: space-around;
    align-items: center;
    flex-shrink: 0;
}

.mobile-nav-tab {
    flex: 1;
    height: 100%;
    background: transparent;
    border: none;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    font-size: 0.72rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 6px 0;
}

.mobile-nav-tab i {
    width: 20px;
    height: 20px;
    transition: transform 0.15s ease, color 0.15s ease;
}

.mobile-nav-tab.active {
    color: var(--accent-blue);
    font-weight: 700;
}

.mobile-nav-tab.active i {
    color: var(--accent-blue);
    transform: translateY(-2px);
}

/* 📱 Responsive Media Queries */
@media (max-width: 768px) {
    :root {
        --header-height: 48px;
    }

    .nav-tabs {
        display: none !important;
    }

    .mobile-bottom-nav {
        display: flex;
    }

    .sidebar-backdrop.visible {
        display: block;
        opacity: 1;
        pointer-events: auto;
    }

    .sessions-sidebar {
        position: fixed;
        top: 0; left: 0; bottom: 0;
        z-index: 50;
        transform: translateX(-100%);
        box-shadow: 4px 0 24px rgba(0,0,0,0.6);
        width: min(300px, 85vw) !important;
        opacity: 1 !important;
        pointer-events: auto !important;
        transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    .sidebar-close-btn {
        display: flex !important;
    }

    .chat-messages-container {
        padding: 12px 10px;
    }

    .chat-message-row {
        gap: 8px;
    }

    .message-bubble {
        max-width: calc(100% - 40px);
    }

    .settings-layout {
        flex-direction: column;
    }

    .settings-nav {
        width: 100%;
        flex-direction: row;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 6px 8px;
        gap: 6px;
        flex-shrink: 0;
        box-sizing: border-box;
    }

    .settings-nav::-webkit-scrollbar {
        display: none;
    }

    .settings-sub-tab {
        flex-shrink: 0;
        white-space: nowrap;
        padding: 7px 11px;
        font-size: 0.8rem;
    }

    .settings-content {
        padding: 14px 12px 24px;
    }

    .prompt-grid {
        grid-template-columns: 1fr;
    }

    .models-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}