/* ==========================================================================
   PigBunn - Digital Toolbox Core Stylesheet
   Vanilla CSS & Design Tokens (Dark / Light Theme)
   Zero External Dependencies / Zero CDN Calls
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & Theme Variables
   -------------------------------------------------------------------------- */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Universal Constants */
  --sidebar-width: 256px;
  --topbar-height: 60px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;

  /* Accent Palette */
  --color-primary: #f43f5e;
  --color-primary-hover: #e11d48;
  --color-primary-subtle: rgba(244, 63, 94, 0.12);
  --color-accent-border: rgba(244, 63, 94, 0.3);

  /* Suite Categorical Accents */
  --accent-ai: #a855f7;
  --accent-ai-bg: rgba(168, 85, 247, 0.12);
  --accent-seo: #0ea5e9;
  --accent-seo-bg: rgba(14, 165, 233, 0.12);
  --accent-osint: #f59e0b;
  --accent-osint-bg: rgba(245, 158, 11, 0.12);
  --accent-apps: #10b981;
  --accent-apps-bg: rgba(16, 185, 129, 0.12);
  --accent-transfer: #ec4899;
  --accent-transfer-bg: rgba(236, 72, 153, 0.12);
  --accent-links: #6366f1;
  --accent-links-bg: rgba(99, 102, 241, 0.12);
  --accent-batch: #14b8a6;
  --accent-batch-bg: rgba(20, 184, 166, 0.12);
}

/* Dark Theme (Default) */
[data-theme="dark"] {
  --bg-app: #090d16;
  --bg-sidebar: #0f1523;
  --bg-topbar: rgba(15, 21, 35, 0.85);
  --bg-card: #131b2e;
  --bg-card-hover: #19243d;
  --bg-input: #0b101c;
  --bg-elevated: #1e293b;
  --bg-pill: #1a2235;

  --border-subtle: #1e293b;
  --border-muted: #2d3b55;
  --border-focus: #f43f5e;

  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.25), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-elevated: 0 10px 15px -3px rgba(0, 0, 0, 0.35);
}

/* Light Theme */
[data-theme="light"] {
  --bg-app: #f8fafc;
  --bg-sidebar: #ffffff;
  --bg-topbar: rgba(255, 255, 255, 0.9);
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-input: #f1f5f9;
  --bg-elevated: #e2e8f0;
  --bg-pill: #f1f5f9;

  --border-subtle: #e2e8f0;
  --border-muted: #cbd5e1;
  --border-focus: #f43f5e;

  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.07), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-elevated: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}

/* --------------------------------------------------------------------------
   2. Reset & Base Typography
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

a {
  color: inherit;
  text-decoration: none;
}

kbd {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   3. App Layout (Sidebar + Main Stage)
   -------------------------------------------------------------------------- */
.app-layout {
  display: flex;
  min-height: 100vh;
  position: relative;
}

/* Sidebar Backdrop (Mobile Overlay) */
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.sidebar-backdrop.active {
  opacity: 1;
  visibility: visible;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: transform var(--transition-normal), background-color var(--transition-normal), border-color var(--transition-normal);
}

.sidebar-header {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  border-radius: var(--radius-sm);
  display: block;
}

.brand-text {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.15rem 0.4rem;
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

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

/* Sidebar Nav */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0.75rem;
}

.nav-group-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0.5rem 0.5rem 0.35rem 0.75rem;
}

.nav-list {
  list-style: none;
  margin-bottom: 1.25rem;
}

.nav-item {
  margin-bottom: 0.2rem;
}

.nav-link {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: left;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-main);
}

.nav-link.active {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  font-weight: 600;
}

.nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: inherit;
  flex-shrink: 0;
}

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

.nav-pill {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-elevated);
  color: var(--text-muted);
}

/* Sidebar Owner Info Section */
.sidebar-owner-section {
  padding: 0.75rem 0.75rem 0.85rem 0.75rem;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-sidebar);
  flex-shrink: 0;
}

.owner-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 0.5rem 0.4rem 0.5rem;
}

.owner-links-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.owner-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.owner-link:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-muted);
  transform: translateX(2px);
}

.owner-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.owner-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.telegram-icon {
  color: #0ea5e9;
  background-color: rgba(14, 165, 233, 0.12);
}

.shop-icon {
  color: #f59e0b;
  background-color: rgba(245, 158, 11, 0.12);
}

.owner-info-text {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.owner-link-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.25;
}

.owner-link-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

.external-icon {
  color: var(--text-muted);
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.owner-link:hover .external-icon {
  opacity: 1;
  color: var(--color-primary);
  transform: translate(1px, -1px);
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.system-status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

/* --------------------------------------------------------------------------
   4. Main Content Wrapper & Topbar
   -------------------------------------------------------------------------- */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: calc(100% - var(--sidebar-width));
  transition: margin var(--transition-normal);
}

/* Topbar */
.topbar {
  height: var(--topbar-height);
  background-color: var(--bg-topbar);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 50;
  gap: 1rem;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-menu-btn {
  display: none;
}

.view-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.breadcrumb-root {
  color: var(--text-muted);
}

.breadcrumb-separator {
  color: var(--border-muted);
  font-size: 0.8rem;
}

.breadcrumb-current {
  color: var(--text-main);
  font-weight: 600;
}

/* Topbar Global Search */
.topbar-search {
  flex: 1;
  max-width: 480px;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0 0.75rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input-wrapper:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-subtle);
}

.search-icon {
  color: var(--text-muted);
  flex-shrink: 0;
  margin-right: 0.5rem;
}

.search-input-wrapper input {
  width: 100%;
  height: 36px;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.875rem;
}

.search-input-wrapper input::placeholder {
  color: var(--text-muted);
}

.search-kbd {
  pointer-events: none;
  white-space: nowrap;
}

/* Topbar Actions */
.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

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

/* Theme Toggle Visual Switching */
[data-theme="dark"] .icon-moon {
  display: none;
}
[data-theme="dark"] .icon-sun {
  display: block;
}

[data-theme="light"] .icon-sun {
  display: none;
}
[data-theme="light"] .icon-moon {
  display: block;
}

/* --------------------------------------------------------------------------
   5. Content Stage & View Panels
   -------------------------------------------------------------------------- */
.content-stage {
  flex: 1;
  padding: 2rem 1.5rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.view-panel {
  display: none;
  animation: fadeIn 0.2s ease-in-out;
}

.view-panel.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   6. Dashboard Home View Styles
   -------------------------------------------------------------------------- */
.dashboard-hero {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: var(--shadow-card);
}

@media (min-width: 768px) {
  .dashboard-hero {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.hero-content {
  max-width: 580px;
}

.hero-heading {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.hero-metrics {
  display: flex;
  gap: 1rem;
  flex-shrink: 0;
}

.metric-card {
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.15rem;
  display: flex;
  flex-direction: column;
  min-width: 110px;
}

.metric-number {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}

.metric-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 0.2rem;
}

/* Filter Chips Bar */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.filter-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.filter-chips {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-chip {
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.filter-chip:hover {
  border-color: var(--border-muted);
  color: var(--text-main);
}

.filter-chip.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
  font-weight: 600;
}

/* Tools Section Header */
.section-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.tools-count {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* Tool Cards */
.tool-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-card);
}

.tool-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-muted);
  box-shadow: var(--shadow-elevated);
}

.tool-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.tool-icon-box {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Categorical Icon Box Accents */
.ai-color { color: var(--accent-ai); background-color: var(--accent-ai-bg); }
.seo-color { color: var(--accent-seo); background-color: var(--accent-seo-bg); }
.osint-color { color: var(--accent-osint); background-color: var(--accent-osint-bg); }
.apps-color { color: var(--accent-apps); background-color: var(--accent-apps-bg); }
.transfer-color { color: var(--accent-transfer); background-color: var(--accent-transfer-bg); }
.links-color { color: var(--accent-links); background-color: var(--accent-links-bg); }
.batch-color { color: var(--accent-batch); background-color: var(--accent-batch-bg); }

.category-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background-color: var(--bg-pill);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

.tool-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.tool-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex: 1;
}

.tool-card-footer {
  margin-top: auto;
}

.btn-tool-action {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: gap var(--transition-fast);
}

.btn-tool-action:hover {
  gap: 0.6rem;
  color: var(--color-primary-hover);
}

/* Empty State */
.no-results-state {
  text-align: center;
  padding: 3.5rem 1.5rem;
  background-color: var(--bg-card);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
}

.no-results-state p {
  margin: 1rem 0;
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   7. Placeholder Suite View Styling
   -------------------------------------------------------------------------- */
.placeholder-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  max-width: 680px;
  margin: 1.5rem auto;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.placeholder-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.placeholder-icon-box {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem auto;
}

.placeholder-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.placeholder-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 540px;
  margin: 0 auto 2rem auto;
}

.placeholder-features {
  text-align: left;
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
}

.feature-status {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-elevated);
  color: var(--text-muted);
  text-transform: uppercase;
}

.feature-name {
  color: var(--text-main);
  font-weight: 500;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-elevated);
  color: var(--text-main);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border-subtle);
  transition: background-color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   8. Footer
   -------------------------------------------------------------------------- */
.dashboard-footer {
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-sidebar);
  padding: 1.25rem 1.5rem;
  margin-top: auto;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* --------------------------------------------------------------------------
   8b. AI Workspace Layout & Components
   -------------------------------------------------------------------------- */
.ai-view-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.ai-top-toolbar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-card);
}

@media (min-width: 860px) {
  .ai-top-toolbar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.ai-title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.ai-page-title {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.badge-accent {
  background-color: var(--accent-ai-bg);
  color: var(--accent-ai);
  border: 1px solid rgba(168, 85, 247, 0.25);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-full);
}

.ai-page-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.ai-toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.ai-model-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ai-model-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.ai-select {
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  padding: 0.45rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 500;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.ai-select:focus {
  border-color: var(--color-primary);
}

.ai-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Privacy & Provider Notice Banner */
.ai-sandbox-notice {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent-ai);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.notice-icon {
  color: var(--accent-ai);
  flex-shrink: 0;
  margin-top: 2px;
}

.notice-text code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--bg-elevated);
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius-sm);
  color: var(--text-main);
}

/* Workspace Two-Column Layout */
.ai-workspace-layout {
  display: flex;
  height: 640px;
  max-height: calc(100vh - 220px);
  min-height: 520px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}

.ai-mobile-nav-bar {
  display: none;
}

/* Left Conversations Panel */
.ai-conversations-panel {
  width: 280px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform var(--transition-normal);
}

.ai-panel-header {
  height: 50px;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.ai-panel-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ai-panel-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.ai-count-pill {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
}

#ai-close-conv-drawer {
  display: none;
}

.ai-conversations-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.ai-conv-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
  position: relative;
  gap: 0.5rem;
  width: 100%;
}

.ai-conv-item:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-main);
}

.ai-conv-item.active {
  background-color: var(--accent-ai-bg);
  border-color: rgba(168, 85, 247, 0.25);
  color: var(--text-main);
  font-weight: 600;
}

.ai-conv-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.ai-conv-item-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 0.84rem;
}

.ai-conv-item-time {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.ai-conv-delete-btn {
  opacity: 0;
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 0.2rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.ai-conv-item:hover .ai-conv-delete-btn,
.ai-conv-item.active .ai-conv-delete-btn {
  opacity: 1;
}

.ai-conv-delete-btn:hover {
  color: var(--color-primary);
  background: var(--bg-elevated);
}

.ai-panel-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border-subtle);
}

.ai-add-chat-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-ai);
  cursor: pointer;
}

.ai-add-chat-link:hover {
  text-decoration: underline;
}

/* Right Chat Panel */
.ai-chat-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-card);
  min-width: 0;
}

.ai-chat-header {
  height: 50px;
  padding: 0 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ai-chat-header-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.ai-active-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ai-active-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--bg-elevated);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

/* Messages Log Wrapper */
.ai-messages-wrapper {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  scroll-behavior: smooth;
}

/* Empty State */
.ai-empty-state {
  margin: auto;
  max-width: 580px;
  text-align: center;
  padding: 2rem 1rem;
}

.ai-empty-icon-box {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem auto;
}

.ai-empty-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.ai-empty-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.ai-suggestion-box {
  text-align: left;
  background: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
}

.ai-suggestion-title {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.ai-suggestions-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.ai-suggestion-chip {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.ai-suggestion-chip:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-ai);
  color: var(--text-main);
  transform: translateX(2px);
}

/* Messages List */
.ai-messages-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.ai-message {
  display: flex;
  gap: 0.85rem;
  max-width: 88%;
  animation: fadeIn 0.2s ease-in-out;
}

.ai-message.user {
  margin-left: auto;
  flex-direction: row-reverse;
}

.ai-msg-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 700;
}

.ai-message.user .ai-msg-avatar {
  background: var(--color-primary);
  color: #ffffff;
}

.ai-message.assistant .ai-msg-avatar {
  background: var(--accent-ai-bg);
  color: var(--accent-ai);
  border: 1px solid rgba(168, 85, 247, 0.25);
}

.ai-msg-body {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.ai-msg-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.ai-message.user .ai-msg-meta {
  justify-content: flex-end;
}

.ai-demo-tag {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  background: var(--accent-ai-bg);
  color: var(--accent-ai);
  border: 1px solid rgba(168, 85, 247, 0.2);
}

.ai-msg-bubble {
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-lg);
  font-size: 0.88rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.ai-message.user .ai-msg-bubble {
  background-color: var(--color-primary);
  color: #ffffff;
  border-bottom-right-radius: var(--radius-sm);
}

.ai-message.assistant .ai-msg-bubble {
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  border-bottom-left-radius: var(--radius-sm);
}

.ai-msg-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.2rem;
}

.ai-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ai-copy-btn:hover {
  background: var(--bg-elevated);
  color: var(--text-main);
  border-color: var(--border-subtle);
}

.ai-copy-btn.copied {
  color: #10b981;
}

/* Typing Indicator */
.ai-typing-indicator {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
}

.typing-bubble {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0.5rem 0.85rem;
  background-color: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-ai);
  animation: typingPulse 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes typingPulse {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1.1); opacity: 1; }
}

.typing-caption {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Input Form & Bar */
.ai-input-form {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-sidebar);
}

.ai-input-container {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.75rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.ai-input-container:focus-within {
  border-color: var(--accent-ai);
  box-shadow: 0 0 0 2px var(--accent-ai-bg);
}

.ai-prompt-textarea {
  width: 100%;
  min-height: 48px;
  max-height: 160px;
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.88rem;
  line-height: 1.5;
}

.ai-prompt-textarea::placeholder {
  color: var(--text-muted);
}

.ai-input-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.4rem;
  border-top: 1px solid rgba(125, 125, 125, 0.1);
  gap: 0.5rem;
}

.ai-input-hints {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ai-kbd-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.ai-input-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-sm {
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
}

/* Responsive Overrides for AI Workspace */
@media (max-width: 900px) {
  .ai-workspace-layout {
    flex-direction: column;
    height: auto;
    max-height: none;
  }

  .ai-mobile-nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-sidebar);
  }

  .ai-mobile-conv-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    padding: 0.35rem 0.65rem;
  }

  .ai-mobile-current-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
  }

  .ai-conversations-panel {
    display: none;
    width: 100%;
    max-height: 220px;
  }

  .ai-conversations-panel.open {
    display: flex;
  }

  #ai-close-conv-drawer {
    display: flex;
  }

  .ai-messages-wrapper {
    height: 400px;
  }
}

/* --------------------------------------------------------------------------
   9. Responsive Breakpoints (Mobile & Tablet)
   -------------------------------------------------------------------------- */
@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.4);
  }

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

  .main-wrapper {
    margin-left: 0;
    width: 100%;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .topbar-search {
    max-width: 320px;
  }
}

@media (max-width: 640px) {
  .topbar {
    padding: 0 1rem;
  }

  .search-kbd {
    display: none;
  }

  .view-breadcrumb {
    display: none;
  }

  .content-stage {
    padding: 1.25rem 1rem;
  }

  .dashboard-hero {
    padding: 1.5rem;
  }

  .hero-heading {
    font-size: 1.4rem;
  }

  .hero-metrics {
    flex-wrap: wrap;
  }

  .metric-card {
    flex: 1 1 calc(50% - 0.5rem);
  }

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