/* AntiPro Design System - Modern Glassmorphic Dark UI */

:root {
    --bg-base: #06060c;
    --bg-panel: rgba(15, 15, 27, 0.75);
    --bg-panel-solid: #0d0d18;
    --bg-panel-hover: rgba(30, 30, 48, 0.7);
    --bg-chat-user: rgba(99, 102, 241, 0.15);
    --bg-chat-ai: rgba(20, 20, 35, 0.6);
    
    --border-light: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(99, 102, 241, 0.4);
    
    --accent-primary: #6366f1;
    --accent-secondary: #a855f7;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --accent-glow: 0 0 15px rgba(99, 102, 241, 0.4);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    --danger-color: #ef4444;
    --success-color: #10b981;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', Menlo, Monaco, Consolas, monospace;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Textarea and inputs: always allow select/copy/paste (WKWebView iOS) */
textarea,
input {
    user-select: text;
    -webkit-user-select: text;
    -webkit-touch-callout: default;
}

/* Non-interactive UI elements: disable text selection for app-like feel */
button,
.sidebar,
.sidebar-header,
.section-title,
.sessions-list,
.input-actions,
.input-left-actions,
.input-right-actions,
.modal-header,
.modal-footer,
.project-actions,
.folder-actions,
.sidebar-footer,
.toolbar,
nav,
header,
label,
.btn-icon,
.btn-secondary,
.btn-primary,
.btn-text-sm,
.btn-footer,
.file-tree-header,
.workspace-header,
.tab-bar {
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.5;
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* App Container & Multi-Pane Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* Sidebar General Style */
.sidebar {
    background-color: var(--bg-panel);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    height: 100%;
    flex-shrink: 0;
}

/* Main Sidebar (Projects, Conversations) */
.main-sidebar {
    width: 260px;
}

.sidebar-header {
    height: 52px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    border-bottom: 1px solid var(--border-light);
}

.brand {
    display: flex;
    align-items: center;
    gap: 8px;
}
.brand-logo {
    font-size: 20px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: bold;
}
.brand-name {
    font-weight: 600;
    font-size: 15px;
    letter-spacing: -0.2px;
}

.section-title {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: 20px 16px 8px 16px;
}

/* Project Selector & Actions */
.projects-panel {
    padding: 0 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.project-selector-wrapper {
    position: relative;
}

.custom-select {
    width: 100%;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    outline: none;
    font-family: var(--font-sans);
    font-size: 13px;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%2394a3b8' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}
.custom-select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--border-accent);
}

.project-actions {
    display: flex;
    gap: 6px;
}

.btn-icon {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: 6px 0;
    border-radius: 5px;
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}
.btn-icon:hover:not(:disabled) {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}
.btn-icon:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.btn-danger:hover:not(:disabled) {
    background-color: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--danger-color);
}

.path-display {
    font-size: 11px;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding: 2px 4px;
}

.folder-actions {
    display: flex;
    gap: 6px;
    margin-top: 6px;
    padding: 0 2px;
}

.btn-text-sm {
    display: flex;
    align-items: center;
    gap: 5px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 11px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    white-space: nowrap;
    flex: 1;
    justify-content: center;
}

.btn-text-sm:hover {
    background: rgba(99,102,241,0.15);
    border-color: var(--border-accent);
    color: var(--text-primary);
}

.btn-text-sm svg {
    flex-shrink: 0;
    opacity: 0.7;
}

/* Sessions and Conversations */
.sessions-list-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 0 16px;
    overflow: hidden;
}

.btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    background: var(--accent-gradient);
    border: none;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-weight: 500;
    font-size: 13px;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;
    box-shadow: var(--accent-glow);
}
.btn-secondary:hover:not(:disabled) {
    opacity: 0.95;
    transform: translateY(-1px);
}
.btn-secondary:active:not(:disabled) {
    transform: translateY(0);
}
.btn-secondary:disabled {
    background: var(--text-muted);
    box-shadow: none;
    opacity: 0.5;
    cursor: not-allowed;
}

.sessions-list {
    margin-top: 10px;
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-session-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
    border: 1px solid transparent;
}
.chat-session-item:hover {
    background-color: var(--bg-panel-hover);
}
.chat-session-item.active {
    background-color: rgba(99, 102, 241, 0.12);
    border-color: rgba(99, 102, 241, 0.25);
}

.session-name {
    flex: 1;
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 8px;
}
.chat-session-item.active .session-name {
    color: var(--text-primary);
    font-weight: 500;
}

.btn-delete-session {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s;
    font-size: 14px;
    display: flex;
    align-items: center;
}
.chat-session-item:hover .btn-delete-session {
    opacity: 1;
}
.btn-delete-session:hover {
    color: var(--danger-color);
}

.empty-list-message {
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    padding: 20px 0;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-light);
}
.btn-footer {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background-color: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: 8px 0;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}
.btn-footer:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

/* Sidebar 2: Workspace Explorer */
.explorer-sidebar {
    width: 240px;
    background-color: rgba(10, 10, 18, 0.6);
    border-right: 1px solid var(--border-light);
}

.explorer-header {
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 14px;
    border-bottom: 1px solid var(--border-light);
}

.explorer-title {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: -0.1px;
    color: var(--text-secondary);
}

.btn-small-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    border-radius: 4px;
    transition: background 0.2s, color 0.2s;
}
.btn-small-icon:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}
.btn-small-icon:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.explorer-container {
    flex: 1;
    overflow-y: auto;
    position: relative;
    padding: 10px 8px;
}

.folder-prompt-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.folder-prompt-overlay p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.4;
}

.btn-primary {
    background: var(--accent-gradient);
    border: none;
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    box-shadow: var(--accent-glow);
    transition: opacity 0.2s;
}
.btn-primary:hover {
    opacity: 0.95;
}
.btn-primary:disabled {
    background: var(--text-muted);
    box-shadow: none;
    opacity: 0.5;
}
.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* File Tree Display */
.file-tree {
    font-family: var(--font-sans);
    font-size: 13px;
}

.tree-node {
    display: flex;
    align-items: center;
    padding: 4px 6px;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-secondary);
    gap: 6px;
    margin-bottom: 2px;
    position: relative;
}
.tree-node:hover {
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.tree-node-indent {
    width: 14px;
    flex-shrink: 0;
}

.tree-node-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.tree-node-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-node.directory .tree-node-icon {
    color: #eab308; /* Folder gold */
}

.tree-node.file.attached {
    background-color: rgba(99, 102, 241, 0.08);
    color: var(--accent-primary);
    border-left: 2px solid var(--accent-primary);
    padding-left: 4px;
}

.tree-node-checkbox {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    border: 1px solid var(--text-muted);
    position: absolute;
    right: 8px;
    opacity: 0;
    transition: opacity 0.2s;
}
.tree-node:hover .tree-node-checkbox {
    opacity: 0.6;
}
.tree-node.attached .tree-node-checkbox {
    opacity: 1;
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.empty-explorer-message {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    padding: 30px 10px;
}

/* Main Chat Canvas Area */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    background-color: rgba(10, 10, 14, 0.2);
}

.chat-header {
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    border-bottom: 1px solid var(--border-light);
    -webkit-app-region: drag; /* Window dragging support */
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}
.chat-header-info h2 {
    font-size: 15px;
    font-weight: 600;
}

.model-badge {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary);
    border: 1px solid rgba(99, 102, 241, 0.25);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
}

.window-controls-spacer {
    width: 80px; /* Spacer to avoid overlapping macOS window controls in fullSizeContentView mode */
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Chat Messages Layout */
.message-row {
    display: flex;
    width: 100%;
    animation: fadeIn 0.2s ease-out;
}
.message-row.user {
    justify-content: flex-end;
}
.message-row.assistant {
    justify-content: flex-start;
}

.message-bubble {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 14px;
    line-height: 1.6;
    user-select: text; /* Allow user to select text in chat bubble */
}

.message-row.user .message-bubble {
    background-color: var(--bg-chat-user);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-top-right-radius: 2px;
    color: var(--text-primary);
}

.message-row.assistant .message-bubble {
    background-color: var(--bg-chat-ai);
    border: 1px solid var(--border-light);
    border-top-left-radius: 2px;
    color: var(--text-secondary);
}

/* Markdown Elements Styling */
.message-bubble h1, .message-bubble h2, .message-bubble h3 {
    margin: 14px 0 8px 0;
    color: var(--text-primary);
    font-weight: 600;
}
.message-bubble h1 { font-size: 1.3em; }
.message-bubble h2 { font-size: 1.15em; }
.message-bubble h3 { font-size: 1.05em; }

.message-bubble p {
    margin-bottom: 10px;
}
.message-bubble p:last-child {
    margin-bottom: 0;
}

.message-bubble ul, .message-bubble ol {
    margin-bottom: 10px;
    padding-left: 20px;
}

.message-bubble li {
    margin-bottom: 4px;
}

.message-bubble blockquote {
    border-left: 3px solid var(--accent-primary);
    padding: 4px 12px;
    background-color: rgba(255, 255, 255, 0.03);
    border-radius: 4px;
    margin: 10px 0;
    color: var(--text-muted);
}

.message-bubble code {
    font-family: var(--font-mono);
    font-size: 12px;
    background-color: rgba(255, 255, 255, 0.08);
    padding: 2px 5px;
    border-radius: 4px;
    color: var(--text-primary);
}

/* Code Block wrapper */
.code-block-container {
    margin: 12px 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-light);
    background-color: #0d0d14;
}

.code-block-header {
    height: 32px;
    background-color: #161622;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    border-bottom: 1px solid var(--border-light);
}

.code-block-lang {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
}

.btn-copy-code {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    transition: background 0.2s, color 0.2s;
}
.btn-copy-code:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.code-block-container pre {
    margin: 0 !important;
    padding: 12px !important;
    overflow-x: auto;
    background-color: transparent !important;
}
.code-block-container code {
    background-color: transparent !important;
    padding: 0 !important;
    font-size: 12px !important;
    line-height: 1.5 !important;
    display: block;
}

/* Code Diff Blocks */
.diff-line-add {
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
}
.diff-line-del {
    background-color: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

/* Workspace Proposed File Edit View */
.proposed-edit-container {
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid var(--border-accent);
    border-radius: 8px;
    margin: 12px 0;
    padding: 12px;
}
.proposed-edit-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}
.proposed-edit-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 13px;
}
.proposed-edit-actions {
    display: flex;
    gap: 8px;
}
.btn-write-file {
    background: var(--accent-gradient);
    color: white;
    border: none;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
}

/* Chat Input Footer Area */
.chat-footer {
    padding: 0 20px 20px 20px;
}

.input-panel {
    background-color: var(--bg-panel-solid);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: border-color 0.2s;
}
.input-panel:focus-within {
    border-color: var(--accent-primary);
}

#prompt-input {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    outline: none;
    resize: none;
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    max-height: 200px;
}
#prompt-input::placeholder {
    color: var(--text-muted);
}

.input-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    padding-top: 8px;
}

.input-left-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-input-action {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: color 0.2s;
}
.btn-input-action:hover:not(:disabled) {
    color: var(--text-secondary);
}
.btn-input-action:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.char-count {
    font-size: 11px;
    color: var(--text-muted);
}

.input-right-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-send {
    background: var(--accent-gradient);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--accent-glow);
    transition: opacity 0.2s;
}
.btn-send:hover:not(:disabled) {
    opacity: 0.95;
}
.btn-send:disabled {
    background: #27273a;
    color: var(--text-muted);
    box-shadow: none;
    cursor: not-allowed;
}

.btn-stop {
    background-color: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
}
.btn-stop:hover {
    background-color: rgba(239, 68, 68, 0.25);
}
.stop-icon {
    width: 8px;
    height: 8px;
    background-color: var(--danger-color);
    border-radius: 1px;
}

/* Context Tray for Attached Files */
.context-tray {
    padding: 8px 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--border-light);
}
.context-tray-title {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}
.context-chips {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}
.context-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    background-color: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--accent-primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
}
.btn-remove-chip {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-weight: bold;
    font-size: 12px;
}
.btn-remove-chip:hover {
    color: var(--danger-color);
}

/* Welcome Dashboard Grid Layout */
.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    max-width: 650px;
    margin: 0 auto;
    text-align: center;
    padding: 40px 20px;
}
.welcome-sparkle {
    font-size: 40px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
    animation: pulse 2s infinite ease-in-out;
}
.welcome-screen h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}
.welcome-screen p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 30px;
}
.welcome-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    width: 100%;
}
.step-card {
    background-color: var(--bg-panel-solid);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.step-num {
    background: var(--accent-gradient);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    color: white;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    margin-bottom: 10px;
}
.step-card h3 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
}
.step-card p {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: 0;
}

/* Modal Overlay & Custom Modal Panels */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200; /* Must overlay mobile drawers (150) and sidebar-backdrop (140) */
    animation: fadeIn 0.2s ease-out;
}

/* Sidebar Backdrop Overlay for Mobile Drawers */
.sidebar-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 140; /* Sits behind drawers (150) but in front of main panel (0) */
    transition: opacity 0.25s ease-out;
    animation: fadeIn 0.2s ease-out;
}

.modal-box {
    background-color: var(--bg-panel-solid);
    border: 1px solid var(--border-light);
    width: 500px;
    max-width: 90%;
    max-height: 90vh;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
}
.modal-box-sm {
    width: 380px;
}

.modal-header {
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.modal-header h3 {
    font-size: 15px;
    font-weight: 600;
}
.btn-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin: -10px;
    transition: background-color 0.2s, color 0.2s;
}
.btn-close:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.form-group label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.api-key-input-wrapper {
    display: flex;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    overflow: hidden;
}
.api-key-input-wrapper input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 8px 12px;
    outline: none;
}
.btn-text-action {
    background: transparent;
    border: none;
    color: var(--accent-primary);
    padding: 0 12px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
}

.form-help {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.4;
}

.custom-slider {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    outline: none;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

.modal-body textarea {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 8px 12px;
    color: var(--text-primary);
    outline: none;
    font-family: var(--font-sans);
    font-size: 13px;
    resize: none;
}

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

/* Prompt Modal Extra Input styling */
#prompt-modal-input {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 8px 12px;
    color: var(--text-primary);
    outline: none;
    font-family: var(--font-sans);
}
#prompt-modal-input:focus {
    border-color: var(--accent-primary);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

/* Helper hidden utilities */
.hidden {
    display: none !important;
}

/* Thinking Indicator Animation */
.thinking-indicator {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 4px 0;
    min-width: 180px;
}
.thinking-dots-row {
    display: flex;
    align-items: center;
    gap: 6px;
}
.thinking-dot {
    width: 10px;
    height: 10px;
    background: linear-gradient(135deg, var(--accent-primary), #a855f7);
    border-radius: 50%;
    animation: thinking 1.4s infinite ease-in-out;
    flex-shrink: 0;
}
.thinking-dot:nth-child(2) { animation-delay: 0.2s; }
.thinking-dot:nth-child(3) { animation-delay: 0.4s; }

.thinking-label {
    font-size: 0.78em;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}
.thinking-timer {
    font-variant-numeric: tabular-nums;
    color: var(--accent-primary);
    font-weight: 600;
    min-width: 24px;
}
.thinking-progress-bar {
    width: 100%;
    height: 3px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}
.thinking-progress-fill {
    height: 100%;
    width: 40%;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent-primary), #a855f7);
    animation: thinking-progress 1.6s infinite ease-in-out;
}

@keyframes thinking {
    0%, 100% { transform: translateY(0); opacity: 0.5; }
    50% { transform: translateY(-5px); opacity: 1; }
}

@keyframes thinking-progress {
    0%   { transform: translateX(-150%); }
    50%  { transform: translateX(80%); }
    100% { transform: translateX(250%); }
}

/* Header Toggle Buttons for Mobile */
.btn-header-action {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 6px;
    transition: background-color 0.2s, color 0.2s;
}
.btn-header-action:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}
.btn-header-action svg {
    stroke: currentColor;
}

/* Tablet & Mobile Responsiveness */
@media (max-width: 1024px) {
    .btn-header-action {
        display: flex;
    }
    
    .window-controls-spacer {
        display: none !important;
    }

    .main-sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        bottom: 0;
        z-index: 150;
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: none;
    }
    .main-sidebar.open {
        left: 0;
        box-shadow: 5px 0 25px rgba(0, 0, 0, 0.6);
    }

    .explorer-sidebar {
        position: fixed;
        right: -280px;
        top: 0;
        bottom: 0;
        z-index: 150;
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: none;
    }
    .explorer-sidebar.open {
        right: 0;
        box-shadow: -5px 0 25px rgba(0, 0, 0, 0.6);
    }
    
    /* Ensure the chat main layout behaves nicely when sidebars are offscreen */
    .app-container {
        position: relative;
    }
    
    .chat-main {
        width: 100vw;
        flex: none;
    }
    
    /* Adjust welcome screens for narrow width */
    .welcome-steps {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .welcome-screen h1 {
        font-size: 20px;
    }
    
    /* Smooth transitions and touch adjustments */
    .message-bubble {
        max-width: 90%;
    }
}

/* Assistant Message Bubble Actions (Copy, PDF/Print) */
.message-bubble {
    position: relative;
}

.message-bubble-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 8px;
}

.btn-copy-message,
.btn-print-message,
.btn-save-pdf-message {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 11px;
    font-weight: 500;
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background-color 0.2s, color 0.2s;
}

.btn-copy-message:hover,
.btn-print-message:hover,
.btn-save-pdf-message:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.btn-copy-message svg,
.btn-print-message svg,
.btn-save-pdf-message svg {
    stroke: currentColor;
    flex-shrink: 0;
}

/* Print/Save to PDF Media Style Sheet */
@media print {
    /* Reset scrollable layers to prevent cut-offs */
    html, body, .app-container, .chat-main, .chat-messages {
        height: auto !important;
        overflow: visible !important;
        display: block !important;
        background: white !important;
        color: black !important;
    }

    /* Hide the entire application interface */
    body * {
        visibility: hidden;
    }

    /* Make only the targeted printing message bubble visible */
    .printing-active,
    .printing-active * {
        visibility: visible;
    }

    /* Expand the targeted printing message bubble to full width and format on white paper background */
    .printing-active {
        position: absolute !important;
        left: 0 !important;
        top: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        padding: 20px !important;
        background: white !important;
        color: #000000 !important;
        box-shadow: none !important;
        border: none !important;
        font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
        font-size: 14px !important;
        line-height: 1.6 !important;
    }

    /* Hide interactive elements and headers within the printed content */
    .printing-active .message-bubble-actions,
    .printing-active .code-block-header,
    .printing-active .btn-copy-code,
    .printing-active .btn-write-project-file {
        display: none !important;
    }

    /* Format code snippets for crisp paper output */
    .printing-active code {
        font-family: 'Fira Code', monospace !important;
        font-size: 12px !important;
        background: #f1f5f9 !important;
        color: #0f172a !important;
        padding: 2px 4px !important;
        border-radius: 4px !important;
    }

    .printing-active pre {
        background: #f8fafc !important;
        border: 1px solid #e2e8f0 !important;
        padding: 12px !important;
        border-radius: 6px !important;
        margin: 12px 0 !important;
        overflow: visible !important;
        white-space: pre-wrap !important;
        word-break: break-all !important;
    }

    .printing-active pre code {
        background: transparent !important;
        padding: 0 !important;
        color: #0f172a !important;
    }
}


/* ── IMAGE GENERATION CARD ─────────────────────────────────────────────── */
.image-gen-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 480px;
}
.image-gen-prompt {
    margin: 0;
    font-size: 0.8em;
    color: var(--text-muted);
    font-style: italic;
}
.image-gen-img {
    width: 100%;
    border-radius: 12px;
    display: block;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.image-gen-actions {
    display: flex;
    gap: 8px;
}
.image-save-btn, .image-copy-btn {
    flex: 1;
    padding: 8px 12px;
    border: none;
    border-radius: 8px;
    background: var(--surface-2, rgba(255,255,255,0.1));
    color: var(--text-primary, #fff);
    cursor: pointer;
    font-size: 0.85em;
    transition: background 0.2s;
}
.image-save-btn:hover, .image-copy-btn:hover {
    background: var(--accent-color, #7c3aed);
}
.image-hint {
    margin: 4px 0 0 0;
    font-size: 0.75em;
    color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════════════════
   MULTI-PLATFORM RESPONSIVE — iPhone / iPad / Mac
   ═══════════════════════════════════════════════════════════════ */

/* ── Safe area (notch, Dynamic Island, iPad rounded corners) ─── */
:root {
    --safe-top:    env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left:   env(safe-area-inset-left, 0px);
    --safe-right:  env(safe-area-inset-right, 0px);
}

/* Input panel rispetta il safe-area-bottom su tutti i device */
.chat-footer {
    padding-bottom: max(12px, env(safe-area-inset-bottom));
}

/* Touch: rimuovi ritardo 300ms e ghost-highlights ovunque */
button, a, [role="button"] {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

/* ── Mac (> 1280px) — Layout desktop ampio ───────────────────── */
@media (min-width: 1280px) {
    .main-sidebar    { width: 280px; }
    .explorer-sidebar { width: 260px; }
    .message-bubble  { max-width: 70%; }
    .chat-messages   { padding: 32px 48px; }
}

/* ── iPad landscape / large tablet (1024px–1280px) ───────────── */
@media (min-width: 1024px) and (max-width: 1280px) {
    .main-sidebar    { width: 260px; }
    .explorer-sidebar { width: 240px; }
    .message-bubble  { max-width: 75%; }
}

/* ── iPad portrait / small tablet (600px–1024px) ─────────────── */
@media (min-width: 600px) and (max-width: 1024px) {
    /* Welcome grid: 2 colonne su iPad portrait */
    .welcome-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .welcome-screen h1 { font-size: 22px; }

    /* Messaggi leggermente più larghi su iPad portrait */
    .message-bubble { max-width: 85%; }

    /* Sidebar account bar compatta */
    #account-bar { padding: 10px 12px; }
}

/* ── iPhone e schermi piccoli (< 600px) ──────────────────────── */
@media (max-width: 600px) {

    /* Chat messages: padding ridotto, bubble più larga */
    .chat-messages { padding: 12px 10px; }
    .message-bubble { max-width: 95%; }

    /* Input textarea: font 16px OBBLIGATORIO per bloccare auto-zoom iOS */
    #prompt-input {
        font-size: 16px !important;
        padding: 10px 12px;
    }

    /* Bottoni nell'input panel: tap-target ≥ 44px */
    .btn-send,
    .btn-icon,
    #btn-stop,
    #btn-attach-files,
    #btn-paste-clipboard {
        min-width: 44px;
        min-height: 44px;
    }

    /* Header chat compatto */
    .chat-header { padding: 10px 12px; }
    .chat-header h2 { font-size: 15px; }

    /* Nasconde counter allegati (spazio stretto) */
    #context-size-counter { display: none; }

    /* Sidebar footer compatto */
    #account-bar { padding: 8px 10px; gap: 6px; }
    #account-email { display: none; }

    /* Welcome screen: 1 colonna, testo ridotto */
    .welcome-steps { grid-template-columns: 1fr; gap: 10px; }
    .welcome-screen h1 { font-size: 18px; }
    .welcome-screen p  { font-size: 13px; }
    .welcome-step-card { padding: 14px; }

    /* Modale: tutta la larghezza su iPhone */
    .modal-box {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0;
        border-radius: 20px 20px 0 0;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        max-height: 90vh;
        overflow-y: auto;
    }
    .modal-overlay {
        align-items: flex-end !important;
    }

    /* Code blocks: scroll orizzontale senza overflow */
    pre[class*="language-"] { font-size: 12px; }

    /* Session list item più alto per touch */
    .session-item { min-height: 44px; padding: 10px 12px; }
}

/* ── iPhone landscape (altezza < 500px) ─────────────────────── */
@media (max-height: 500px) and (max-width: 900px) {
    .chat-header   { padding: 6px 12px; }
    .chat-messages { padding: 8px 10px; }
    .input-panel   { padding: 6px 8px; }
    .welcome-screen { padding: 20px 16px; }
    .chat-footer   { padding-bottom: max(6px, env(safe-area-inset-bottom)); }
}

/* ── Attachment Preview Badge ────────────────────────────────── */
.attachment-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px 6px 8px;
    margin: 0 12px 6px;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 10px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: fadeInUp 0.18s ease;
    max-width: 100%;
    overflow: hidden;
}

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

.attachment-thumb {
    width: 36px;
    height: 36px;
    object-fit: cover;
    border-radius: 6px;
    flex-shrink: 0;
    border: 1px solid rgba(255,255,255,0.1);
}

.attachment-icon {
    font-size: 26px;
    flex-shrink: 0;
    line-height: 1;
}

.attachment-name {
    font-size: 13px;
    color: var(--text-primary, #e2e8f0);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.attachment-remove {
    background: none;
    border: none;
    color: var(--text-secondary, #94a3b8);
    font-size: 14px;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    flex-shrink: 0;
    transition: color 0.15s, background 0.15s;
    line-height: 1;
}

.attachment-remove:hover {
    color: #f87171;
    background: rgba(248, 113, 113, 0.12);
}

/* ── Allegato nel bubble messaggio utente ────────────────────── */
.bubble-attachment-img {
    display: block;
    max-width: 260px;
    max-height: 260px;
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 8px;
    border: 1px solid rgba(255,255,255,0.08);
    cursor: zoom-in;
}

.bubble-attachment-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 12px;
    margin-bottom: 6px;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}