/* ============================================
   FRANKLIN UI — Design Tokens & Component Styles
   Typography: DM Sans (UI) + Instrument Serif (logo only)
   Palette: Nexus Design System
   ============================================ */

/* --- Type Scale (Fluid) --- */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  /* --- Spacing (4px grid) --- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* --- Fonts --- */
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
  --font-display: 'Instrument Serif', 'Georgia', serif;

  /* --- Radius --- */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* --- Transitions --- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-enter: 300ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-exit: 200ms cubic-bezier(0.4, 0, 1, 1);

  /* --- Sidebar --- */
  --sidebar-width: 280px;
}

/* ============================================
   LIGHT MODE (default)
   ============================================ */
:root, [data-theme="light"] {
  --color-bg:             #f7f6f2;
  --color-surface:        #f9f8f5;
  --color-surface-2:      #fbfbf9;
  --color-surface-offset: #f3f0ec;
  --color-surface-offset-2: #edeae5;
  --color-surface-dynamic: #e6e4df;
  --color-divider:        #dcd9d5;
  --color-border:         #d4d1ca;

  --color-text:           #28251d;
  --color-text-muted:     #7a7974;
  --color-text-faint:     #bab9b4;
  --color-text-inverse:   #f9f8f4;

  --color-primary:        #01696f;
  --color-primary-hover:  #0c4e54;
  --color-primary-active: #0f3638;
  --color-primary-highlight: #cedcd8;

  --color-warning:        #964219;
  --color-warning-hover:  #713417;
  --color-warning-active: #4b2614;
  --color-warning-highlight: #ddcfc6;

  --color-error:          #a12c7b;
  --color-error-hover:    #7d1e5e;
  --color-error-active:   #561740;
  --color-error-highlight: #e0ced7;

  --color-notification:   #a13544;
  --color-notification-hover: #782b33;
  --color-notification-active: #521f24;
  --color-notification-highlight: #dececb;

  --color-orange:         #da7101;
  --color-orange-hover:   #c55700;
  --color-orange-active:  #ac3e00;
  --color-orange-highlight: #e7d7c4;

  --color-gold:           #d19900;
  --color-gold-hover:     #b07a00;
  --color-gold-active:    #8a5b00;
  --color-gold-highlight: #e9e0c6;

  --color-success:        #437a22;
  --color-success-hover:  #2e5c10;
  --color-success-active: #1e3f0a;
  --color-success-highlight: #d4dfcc;

  --color-blue:           #006494;
  --color-blue-hover:     #0b5177;
  --color-blue-active:    #0b3751;
  --color-blue-highlight: #c6d8e4;

  --color-purple:         #7a39bb;
  --color-purple-hover:   #5f2699;
  --color-purple-active:  #431673;
  --color-purple-highlight: #dacfde;

  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
}

/* ============================================
   DARK MODE
   ============================================ */
[data-theme="dark"] {
  --color-bg:             #171614;
  --color-surface:        #1c1b19;
  --color-surface-2:      #201f1d;
  --color-surface-offset: #1d1c1a;
  --color-surface-offset-2: #22211f;
  --color-surface-dynamic: #2d2c2a;
  --color-divider:        #262523;
  --color-border:         #393836;

  --color-text:           #cdccca;
  --color-text-muted:     #797876;
  --color-text-faint:     #5a5957;
  --color-text-inverse:   #2b2a28;

  --color-primary:        #4f98a3;
  --color-primary-hover:  #227f8b;
  --color-primary-active: #1a626b;
  --color-primary-highlight: #313b3b;

  --color-warning:        #bb653b;
  --color-warning-hover:  #b95525;
  --color-warning-active: #993d10;
  --color-warning-highlight: #564942;

  --color-error:          #d163a7;
  --color-error-hover:    #b9478f;
  --color-error-active:   #9b2f76;
  --color-error-highlight: #4c3d46;

  --color-notification:   #dd6974;
  --color-notification-hover: #c24a59;
  --color-notification-active: #a53142;
  --color-notification-highlight: #574848;

  --color-orange:         #fdab43;
  --color-orange-hover:   #fec47e;
  --color-orange-active:  #fdd1a4;
  --color-orange-highlight: #564b3e;

  --color-gold:           #e8af34;
  --color-gold-hover:     #fdc551;
  --color-gold-active:    #feda74;
  --color-gold-highlight: #4d4332;

  --color-success:        #6daa45;
  --color-success-hover:  #4d8f25;
  --color-success-active: #387015;
  --color-success-highlight: #3a4435;

  --color-blue:           #5591c7;
  --color-blue-hover:     #3b78ab;
  --color-blue-active:    #275f8e;
  --color-blue-highlight: #3a4550;

  --color-purple:         #a86fdf;
  --color-purple-hover:   #9250d0;
  --color-purple-active:  #7537ba;
  --color-purple-highlight: #4e4652;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #171614;
    --color-surface:        #1c1b19;
    --color-surface-2:      #201f1d;
    --color-surface-offset: #1d1c1a;
    --color-surface-offset-2: #22211f;
    --color-surface-dynamic: #2d2c2a;
    --color-divider:        #262523;
    --color-border:         #393836;
    --color-text:           #cdccca;
    --color-text-muted:     #797876;
    --color-text-faint:     #5a5957;
    --color-text-inverse:   #2b2a28;
    --color-primary:        #4f98a3;
    --color-primary-hover:  #227f8b;
    --color-primary-active: #1a626b;
    --color-primary-highlight: #313b3b;
    --color-warning:        #bb653b;
    --color-warning-hover:  #b95525;
    --color-warning-active: #993d10;
    --color-warning-highlight: #564942;
    --color-error:          #d163a7;
    --color-error-hover:    #b9478f;
    --color-error-active:   #9b2f76;
    --color-error-highlight: #4c3d46;
    --color-notification:   #dd6974;
    --color-notification-hover: #c24a59;
    --color-notification-active: #a53142;
    --color-notification-highlight: #574848;
    --color-orange:         #fdab43;
    --color-orange-hover:   #fec47e;
    --color-orange-active:  #fdd1a4;
    --color-orange-highlight: #564b3e;
    --color-gold:           #e8af34;
    --color-gold-hover:     #fdc551;
    --color-gold-active:    #feda74;
    --color-gold-highlight: #4d4332;
    --color-success:        #6daa45;
    --color-success-hover:  #4d8f25;
    --color-success-active: #387015;
    --color-success-highlight: #3a4435;
    --color-blue:           #5591c7;
    --color-blue-hover:     #3b78ab;
    --color-blue-active:    #275f8e;
    --color-blue-highlight: #3a4550;
    --color-purple:         #a86fdf;
    --color-purple-hover:   #9250d0;
    --color-purple-active:  #7537ba;
    --color-purple-highlight: #4e4652;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
  }
}

/* ============================================
   ICON HELPERS
   ============================================ */
.icon-14 { width: 14px; height: 14px; }
.icon-16 { width: 16px; height: 16px; }
.icon-18 { width: 18px; height: 18px; }
.icon-20 { width: 20px; height: 20px; }
.icon-24 { width: 24px; height: 24px; }

/* ============================================
   DASHBOARD LAYOUT
   ============================================ */
html, body {
  height: 100%;
  overflow: hidden;
  margin: 0;
}

.dashboard {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: 1fr;
  height: 100dvh;
  background: var(--color-bg);
}

/* ============================================
   MOBILE HEADER
   ============================================ */
.mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
  position: sticky;
  top: 0;
  z-index: 20;
}
.mobile-header .mobile-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
}
.mobile-menu-btn {
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: background var(--transition-interactive);
}
.mobile-menu-btn:hover { background: var(--color-surface-dynamic); }

@media (max-width: 767px) {
  .dashboard {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }
  .mobile-header { display: flex; }
  .desktop-only { display: none !important; }
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
  grid-row: 1 / -1;
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border-right: 1px solid var(--color-divider);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.sidebar-close-btn {
  display: none;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.sidebar-close-btn:hover { background: var(--color-surface-dynamic); color: var(--color-text); }

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: oklch(0 0 0 / 0.4);
  z-index: 29;
  opacity: 0;
  transition: opacity var(--transition-enter);
}
.sidebar-overlay.visible {
  display: block;
  opacity: 1;
}

@media (max-width: 767px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    z-index: 30;
    transform: translateX(-100%);
    transition: transform var(--transition-enter);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-close-btn { display: flex; }
}

/* Sidebar Header */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-4) var(--space-3);
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.brand-monogram {
  color: var(--color-primary);
  display: flex;
}
.brand-wordmark {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

/* New Chat Button */
.new-chat-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin: var(--space-2) var(--space-4) var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: var(--text-sm);
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}
.new-chat-btn:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.new-chat-btn:active { background: var(--color-primary-active); transform: translateY(0); }

/* Sidebar Nav Tabs */
.sidebar-nav {
  display: flex;
  margin: 0 var(--space-4) var(--space-3);
  gap: var(--space-1);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  padding: var(--space-1);
}
.nav-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: calc(var(--radius-md) - var(--space-1));
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.nav-tab:hover { color: var(--color-text); }
.nav-tab.active {
  background: var(--color-surface-2);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

/* Thread List */
.thread-list {
  flex: 1;
  padding: 0 var(--space-2);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.thread-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  margin: var(--space-1) 0;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-interactive);
  border-left: 3px solid transparent;
}
.thread-item:hover { background: var(--color-surface-offset); }
.thread-item.active {
  background: var(--color-primary-highlight);
  border-left-color: var(--color-primary);
}
.thread-item-content {
  flex: 1;
  min-width: 0;
}
.thread-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.thread-time {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}
.thread-menu-btn {
  opacity: 0;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: opacity var(--transition-interactive), background var(--transition-interactive);
}
.thread-item:hover .thread-menu-btn { opacity: 1; }
.thread-menu-btn:hover { background: var(--color-surface-dynamic); }

/* Thread Context Menu */
.thread-context-menu {
  position: absolute;
  right: var(--space-2);
  top: 100%;
  z-index: 50;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-1);
  min-width: 160px;
  opacity: 0;
  transform: scale(0.95);
  transition: opacity var(--transition-enter), transform var(--transition-enter);
  pointer-events: none;
}
.thread-context-menu.visible {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}
.context-menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: calc(var(--radius-lg) - var(--space-1));
  font-size: var(--text-sm);
  color: var(--color-text);
  text-align: left;
  transition: background var(--transition-interactive);
}
.context-menu-item:hover { background: var(--color-surface-offset); }
.context-menu-item.danger { color: var(--color-notification); }
.context-menu-item.danger:hover { background: var(--color-notification-highlight); }

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}
@media (max-width: 767px) {
  .main-content { grid-column: 1; }
}

.view {
  display: none;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}
.view.active {
  display: flex;
}

/* ============================================
   CHAT VIEW
   ============================================ */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface);
  flex-shrink: 0;
}
.chat-header-left { display: flex; align-items: baseline; gap: var(--space-3); min-width: 0; }
.chat-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-2);
  margin: calc(-1 * var(--space-1)) calc(-1 * var(--space-2));
  transition: background var(--transition-interactive);
  outline: none;
  cursor: text;
}
.chat-title:hover { background: var(--color-surface-offset); }
.chat-title:focus { background: var(--color-surface-offset); }
.chat-date { font-size: var(--text-xs); color: var(--color-text-faint); white-space: nowrap; }

/* Theme Toggle */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.theme-toggle-btn:hover { background: var(--color-surface-dynamic); color: var(--color-text); }

/* Messages Area */
.messages-area {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* Empty State */
.chat-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  flex: 1;
  padding: var(--space-8);
}
.empty-greeting {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.empty-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}
.suggestion-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  max-width: 600px;
}
.suggestion-chip {
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-interactive), border-color var(--transition-interactive), transform var(--transition-interactive);
}
.suggestion-chip:hover {
  background: var(--color-primary-highlight);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}
.suggestion-chip:active { transform: translateY(0); }

/* Message Bubbles */
.message {
  display: flex;
  flex-direction: column;
  max-width: 75%;
}
.message.new {
  animation: msg-enter 300ms cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes msg-enter {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.message.user {
  align-self: flex-end;
}
.message.assistant {
  align-self: flex-start;
}
.message-bubble {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.6;
  word-break: break-word;
  white-space: pre-line;
}
.message.user .message-bubble {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-sm) var(--radius-lg);
}
.message.assistant .message-bubble {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid oklch(from var(--color-text) l c h / 0.06);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) var(--radius-sm);
}
.message-time {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
  opacity: 0;
  transition: opacity var(--transition-interactive);
}
.message:hover .message-time { opacity: 1; }
.message.user .message-time { text-align: right; }

/* Thinking indicator — live activity log */
.thinking-indicator {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.06);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) var(--radius-sm);
  align-self: flex-start;
  max-width: 75%;
}
.thinking-indicator.new {
  animation: msg-enter 300ms cubic-bezier(0.16, 1, 0.3, 1) both;
}
.thinking-current {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.thinking-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  animation: pulse-dot 1.4s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.1); }
}
.thinking-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: italic;
}
.thinking-elapsed {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-variant-numeric: tabular-nums;
  min-width: 2em;
}
.thinking-log:empty { display: none; }
.thinking-log {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.thinking-log-step {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  padding-left: calc(8px + var(--space-3));
}

/* Streaming cursor — blinking caret while tokens arrive */
.message-bubble.streaming::after {
  content: '\25CF';
  color: var(--color-primary);
  animation: pulse-dot 1.4s ease-in-out infinite;
  margin-left: 2px;
}

/* Thinking disclosure — collapsible tool-call summary */
.thinking-disclosure {
  margin-bottom: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.thinking-disclosure summary {
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  padding: var(--space-1) 0;
  font-style: italic;
}
.thinking-disclosure summary:hover {
  color: var(--color-text);
}
.thinking-disclosure summary::marker {
  font-size: 0.7em;
}
.thinking-steps {
  padding: var(--space-2) 0 var(--space-1) var(--space-4);
  border-left: 2px solid var(--color-divider);
}
.thinking-step {
  padding: var(--space-1) 0;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.thinking-step-detail {
  font-size: 0.6875rem;
  color: var(--color-text-faint);
  white-space: pre-wrap;
  word-break: break-all;
  padding: var(--space-1) var(--space-3);
  margin: var(--space-1) 0;
  background: var(--color-surface-offset);
  border-radius: var(--radius-sm);
  max-height: 120px;
  overflow-y: auto;
  line-height: 1.4;
}
.thinking-step-args {
  border-left: 2px solid var(--color-primary);
}
.thinking-step-result {
  border-left: 2px solid var(--color-success);
}

/* Input Area */
.input-area {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-divider);
  background: var(--color-surface);
  flex-shrink: 0;
}
.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: var(--space-2);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-3);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.input-wrapper:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.12);
}
.chat-input {
  flex: 1;
  border: none;
  background: transparent;
  resize: none;
  padding: var(--space-2);
  font-size: var(--text-base);
  line-height: 1.5;
  min-height: 24px;
  max-height: 160px;
  outline: none;
  color: var(--color-text);
}
.chat-input::placeholder { color: var(--color-text-faint); }
.send-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  flex-shrink: 0;
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}
.send-btn:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.send-btn:active { background: var(--color-primary-active); transform: translateY(0); }
.attach-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.attach-btn:hover { color: var(--color-primary); background: var(--color-bg-hover); }
.image-preview-strip:not([hidden]) {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  overflow-x: auto;
  margin-bottom: var(--space-2);
}
.preview-thumb {
  position: relative;
  flex-shrink: 0;
}
.preview-thumb img {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  display: block;
}
.preview-thumb-remove {
  position: absolute;
  top: -6px;
  right: -6px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-bg);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  padding: 0;
  line-height: 1;
  font-size: 12px;
}
.preview-thumb-remove:hover { background: var(--color-danger); color: var(--color-text-inverse); border-color: var(--color-danger); }
.message-images {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}
.message-image {
  max-width: 300px;
  max-height: 200px;
  border-radius: var(--radius-md);
  display: block;
}
.input-helper {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
  text-align: center;
}

/* ============================================
   TASKS VIEW
   ============================================ */
.tasks-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface);
  flex-shrink: 0;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.tasks-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}
.tasks-header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.new-task-btn {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-surface);
  transition: background var(--transition-interactive), border-color var(--transition-interactive);
}
.new-task-btn:hover { background: var(--color-surface-dynamic); border-color: var(--color-text-faint); }
.new-task-hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-style: italic;
}
@media (max-width: 767px) {
  .new-task-hint { display: none; }
}

/* Filter Bar */
.filter-bar {
  padding: var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  background: var(--color-surface);
  flex-shrink: 0;
}
.filter-status {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
}
.filter-pill {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid transparent;
  transition: background var(--transition-interactive), color var(--transition-interactive), border-color var(--transition-interactive);
  white-space: nowrap;
}
.filter-pill:hover { background: var(--color-surface-offset); color: var(--color-text); }
.filter-pill.active {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-color: oklch(from var(--color-primary) l c h / 0.2);
}
.filter-dropdowns {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  flex-wrap: wrap;
}
.filter-select {
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text);
  background: var(--color-surface);
  cursor: pointer;
  transition: border-color var(--transition-interactive);
  -webkit-appearance: none;
  appearance: none;
  padding-right: var(--space-6);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%237a7974' stroke-width='2'%3E%3Cpath d='M3 5l3 3 3-3'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}
.filter-select:hover { border-color: var(--color-text-faint); }
.filter-select:focus { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.clear-filters-btn {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 500;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: background var(--transition-interactive);
}
.clear-filters-btn:hover { background: var(--color-primary-highlight); }

/* Task List */
.task-list {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--space-4) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* Task Card */
.task-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.06);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: box-shadow var(--transition-interactive), border-color var(--transition-interactive), transform var(--transition-interactive);
}
.task-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-highlight);
  transform: translateY(-1px);
}
.task-card:active { transform: translateY(0); }

/* Task completion checkbox — custom circle */
.task-done-check {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: border-color var(--transition-interactive), background var(--transition-interactive);
}
.task-done-check:hover {
  border-color: var(--color-success);
}
.task-done-check:checked {
  border-color: var(--color-success);
  background: var(--color-success);
}
.task-done-check:checked::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 5px;
  width: 5px;
  height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.task-done-check:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.task-title-done {
  text-decoration: line-through;
  color: var(--color-text-faint);
}

.priority-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  margin-top: var(--space-1);
}
.priority-dot.p1 { background: var(--color-notification); }
.priority-dot.p2 { background: var(--color-orange); }
.priority-dot.p3 { background: var(--color-gold); }
.priority-dot.p4 { background: var(--color-blue); }
.priority-dot.p5 { background: var(--color-text-faint); }

/* New Task inline form */
.new-task-form {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 2px solid var(--color-primary-highlight);
  border-radius: var(--radius-lg);
}
.new-task-title-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: var(--text-sm);
  color: var(--color-text);
  font-family: inherit;
}
.new-task-title-input::placeholder { color: var(--color-text-faint); }
.new-task-form-actions { display: flex; gap: var(--space-2); flex-shrink: 0; }
.new-task-save-btn {
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
}
.new-task-save-btn:hover { opacity: 0.9; }
.new-task-save-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.new-task-cancel-btn {
  padding: var(--space-1) var(--space-3);
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  cursor: pointer;
}
.new-task-cancel-btn:hover { background: var(--color-surface-offset); }

.task-card-content { flex: 1; min-width: 0; }
.task-card-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: var(--space-1);
}
.task-card-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-3);
  line-height: 1.5;
}
.task-card-meta {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  align-items: center;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 500;
  white-space: nowrap;
  line-height: 1.5;
}
.badge-open { background: var(--color-primary-highlight); color: var(--color-primary); }
.badge-in_progress { background: var(--color-blue-highlight); color: var(--color-blue); }
.badge-blocked { background: var(--color-orange-highlight); color: var(--color-orange); }
.badge-done { background: var(--color-success-highlight); color: var(--color-success); }
.badge-cancelled { background: var(--color-surface-offset); color: var(--color-text-faint); }
.badge-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}
.badge-role {
  background: var(--color-purple-highlight);
  color: var(--color-purple);
}
.badge-date {
  font-size: 0.6875rem;
  color: var(--color-text-faint);
  padding: 0;
}

/* Empty state for tasks */
.tasks-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16) var(--space-8);
  color: var(--color-text-muted);
  flex: 1;
}
.tasks-empty-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  color: var(--color-text-faint);
}
.tasks-empty h3 {
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.tasks-empty p {
  font-size: var(--text-sm);
  max-width: 36ch;
  margin-bottom: var(--space-4);
}

/* ============================================
   TASK DETAIL PANEL (Slide-over)
   ============================================ */
.task-panel-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: oklch(0 0 0 / 0.3);
  z-index: 39;
  opacity: 0;
  transition: opacity var(--transition-enter);
}
.task-panel-overlay.visible {
  display: block;
  opacity: 1;
}

.task-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(480px, 90vw);
  background: var(--color-bg);
  border-left: 1px solid var(--color-divider);
  box-shadow: var(--shadow-lg);
  z-index: 40;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-enter);
  overflow: hidden;
}
.task-panel.open {
  transform: translateX(0);
}
.task-panel[hidden] { display: none; }

.panel-header {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-divider);
  flex-shrink: 0;
}
.panel-back-btn {
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.panel-back-btn:hover { background: var(--color-surface-dynamic); color: var(--color-text); }

.panel-body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--space-5);
}

/* Panel form fields */
.panel-field { margin-bottom: var(--space-5); }
.panel-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.panel-title-input {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  border: none;
  background: transparent;
  width: 100%;
  padding: var(--space-1) 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-interactive);
  outline: none;
}
.panel-title-input:focus { border-bottom-color: var(--color-primary); }

.panel-select {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  background: var(--color-surface);
  width: 100%;
  transition: border-color var(--transition-interactive);
  -webkit-appearance: none;
  appearance: none;
  padding-right: var(--space-8);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%237a7974' stroke-width='2'%3E%3Cpath d='M3 5l3 3 3-3'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}
.panel-select:focus { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.panel-textarea {
  width: 100%;
  min-height: 80px;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  background: var(--color-surface);
  resize: vertical;
  line-height: 1.6;
  transition: border-color var(--transition-interactive);
  outline: none;
}
.panel-textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.1); }

/* Franklin's Thoughts */
.thoughts-section {
  margin-bottom: var(--space-5);
}
.thoughts-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
  width: 100%;
  text-align: left;
  transition: color var(--transition-interactive);
}
.thoughts-toggle:hover { color: var(--color-text); }
.thoughts-toggle .chevron {
  transition: transform var(--transition-interactive);
}
.thoughts-toggle.expanded .chevron { transform: rotate(90deg); }
.thoughts-content {
  display: none;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary-highlight);
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.thoughts-content.visible { display: block; }

/* Source & Meta */
.panel-source {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
}
.panel-source-icon { color: var(--color-text-faint); }

/* Feedback */
.feedback-section {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.feedback-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive), border-color var(--transition-interactive);
}
.feedback-btn:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-highlight); }
.feedback-btn.active { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-highlight); }
.feedback-btn.active-negative { border-color: var(--color-notification); color: var(--color-notification); background: var(--color-notification-highlight); }
.feedback-btn.active-negative:hover { border-color: var(--color-notification-hover); color: var(--color-notification-hover); }

/* Negative Feedback Form */
.feedback-form {
  display: none;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  animation: feedback-form-enter 250ms cubic-bezier(0.16, 1, 0.3, 1) both;
}
.feedback-form.visible { display: flex; }
@keyframes feedback-form-enter {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.feedback-form-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
}
.feedback-reasons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.feedback-reason {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--transition-interactive), color var(--transition-interactive), border-color var(--transition-interactive);
}
.feedback-reason:hover { background: var(--color-surface-dynamic); color: var(--color-text); }
.feedback-reason.selected {
  background: var(--color-notification-highlight);
  color: var(--color-notification);
  border-color: oklch(from var(--color-notification) l c h / 0.3);
}
.feedback-textarea {
  width: 100%;
  min-height: 60px;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  background: var(--color-surface);
  resize: vertical;
  line-height: 1.5;
  transition: border-color var(--transition-interactive);
  outline: none;
}
.feedback-textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.1); }
.feedback-textarea::placeholder { color: var(--color-text-faint); }
.feedback-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}
.feedback-cancel-btn {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.feedback-cancel-btn:hover { background: var(--color-surface-dynamic); color: var(--color-text); }
.feedback-submit-btn {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 500;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}
.feedback-submit-btn:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.feedback-submit-btn:active { background: var(--color-primary-active); transform: translateY(0); }
.feedback-submitted {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-success-highlight);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-success);
  font-weight: 500;
  animation: feedback-form-enter 250ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.panel-dates {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--color-surface-dynamic);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-border);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 767px) {
  .chat-header, .tasks-header, .filter-bar {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
  .messages-area { padding: var(--space-4); }
  .input-area { padding: var(--space-3) var(--space-4); }
  .task-list { padding: var(--space-3) var(--space-4); }
  .message { max-width: 90%; }
}