/**
 * base.css — F2 Extract
 *
 * CSS variables (:root light + dark), resets, body grid layout,
 * header, sidebar (aside), nav buttons, dark mode overrides for
 * structural elements, settings modal dark overrides, CodeMirror dark.
 *
 * Lines 1-473 from original <style> block.
 */


:root {
  --native-color-scheme: light;
  --bg: #2e2e2e;
  --bg-soft: #363636;
  --panel: rgba(216,214,210,0.96);
  --panel-2: rgba(224,222,218,0.97);
  --line: rgba(15,23,42,0.10);
  --line-strong: rgba(15,23,42,0.18);
  --text: #1a1a1a;
  --fg: #1a1a1a;
  --muted: #5a5a5a;
  --brand: #f97316;
  --brand-2: #c2410c;
  --ok: #16a34a;
  --warn: #d18b19;
  --err: #dc2626;
  /* flame accent */
  --flame: #f97316;
  --flame-mid: #fb923c;
  --flame-glow: rgba(251,146,60,0.22);
  --flame-border: rgba(249,115,22,0.45);
  /* sidebar tokens (always dark) */
  --sidebar-bg: #2e2e2e;
  --sidebar-text: #e8e6e1;
  --sidebar-muted: #9a9890;
  --sidebar-icon-bg: rgba(255,255,255,0.08);
  --sidebar-icon-border: rgba(255,255,255,0.12);
  --sidebar-item-bg: rgba(255,255,255,0.05);
  --sidebar-item-hover: rgba(255,255,255,0.10);
  --sidebar-active-bg: rgba(255,255,255,0.12);
  --sidebar-search-bg: rgba(255,255,255,0.07);
  --sidebar-seg-bg: rgba(255,255,255,0.07);
  --sidebar-seg-active: rgba(255,255,255,0.15);
  --sidebar-w: 240px;
  --right-w: 380px;
  --log-bg: #fbfdff;
  --log-text: #5f6f86;
  --log-info: #2d5fb3;
  --progress-bg: linear-gradient(180deg, #ffffff 0%, #f4f6fb 100%);
  --progress-border: #dbe3ee;
  --progress-shadow: 0 10px 26px rgba(16, 32, 64, 0.08);
  --progress-header-text: #0f172a;
  --progress-chevron: #5f6f86;
  --progress-empty-border: rgba(132, 152, 183, 0.35);
  --progress-empty-text: #5f6f86;
  --progress-empty-bg: rgba(237, 243, 255, 0.55);
  --progress-text-base: #0f172a;
  --progress-text-pending: #5f6f86;
  --progress-text-done: #5f6f86;
  --progress-text-failed: #8b1f2f;
  --progress-text-active: #0f172a;
  --progress-dot-pending-bg: #eef2f8;
  --progress-dot-pending-text: #5f6f86;
  --progress-dot-pending-border: #dbe3ee;
  --progress-dot-done-bg: #1f8fff;
  --progress-dot-done-text: #f8fbff;
  --progress-dot-done-border: #3da1ff;
  --progress-dot-failed-bg: #8b1f2f;
  --progress-dot-failed-text: #fff0f2;
  --progress-dot-failed-border: #b43a4f;
  --progress-dot-active-bg: #f0f5ff;
  --progress-dot-active-text: #0f172a;
  --progress-dot-active-border: #b9cae6;
  --progress-spinner-track: rgba(61, 161, 255, 0.22);
  --progress-spinner-head: #3da1ff;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --shadow-sm: 0 2px 6px rgba(16, 32, 64, 0.06);
  --shadow-md: 0 8px 24px rgba(16, 32, 64, 0.08);
}

:root[data-theme="dark"] {
  --native-color-scheme: dark;
  --bg: #1a1a1a;
  --bg-soft: #222222;
  --panel: #2a2a2a;
  --panel-2: #313131;
  --line: rgba(255,255,255,0.10);
  --line-strong: rgba(255,255,255,0.16);
  --text: #e8e6e1;
  --fg: #e8e6e1;
  --muted: #9a9890;
  --brand: #f97316;
  --brand-2: #c2410c;
  --ok: #4ade80;
  --warn: #fbbf24;
  --err: #f87171;
  --log-bg: #242c39;
  --log-text: #b8c4da;
  --log-info: #82adff;
  --progress-bg: linear-gradient(180deg, #2a313d 0%, #242b36 100%);
  --progress-border: #3d4656;
  --progress-shadow: 0 10px 26px rgba(4, 7, 12, 0.3);
  --progress-header-text: #e8edf6;
  --progress-chevron: #aeb9cb;
  --progress-empty-border: rgba(61, 70, 86, 0.8);
  --progress-empty-text: #aeb9cb;
  --progress-empty-bg: rgba(50, 58, 71, 0.5);
  --progress-text-base: #e8edf6;
  --progress-text-pending: #aeb9cb;
  --progress-text-done: #aeb9cb;
  --progress-text-failed: #f2bbc4;
  --progress-text-active: #e8edf6;
  --progress-dot-pending-bg: #323a47;
  --progress-dot-pending-text: #aeb9cb;
  --progress-dot-pending-border: #3d4656;
  --progress-dot-done-bg: #1f8fff;
  --progress-dot-done-text: #f8fbff;
  --progress-dot-done-border: #3da1ff;
  --progress-dot-failed-bg: #8b1f2f;
  --progress-dot-failed-text: #fff0f2;
  --progress-dot-failed-border: #b43a4f;
  --progress-dot-active-bg: #141822;
  --progress-dot-active-text: #f4f6fb;
  --progress-dot-active-border: #323c4f;
  --progress-spinner-track: rgba(61, 161, 255, 0.22);
  --progress-spinner-head: #3da1ff;
  --shadow-sm: 0 2px 8px rgba(4, 7, 12, 0.28);
  --shadow-md: 0 10px 30px rgba(4, 7, 12, 0.36);
  --sidebar-bg: rgba(20, 20, 19, 0.78);
  --sidebar-icon-bg: rgba(255,255,255,0.07);
  --sidebar-icon-border: rgba(255,255,255,0.10);
  --sidebar-item-bg: rgba(255,255,255,0.045);
  --sidebar-item-hover: rgba(249,115,22,0.10);
  --sidebar-active-bg: rgba(249,115,22,0.14);
  --sidebar-search-bg: rgba(255,255,255,0.055);
  --sidebar-seg-bg: rgba(255,255,255,0.055);
  --sidebar-seg-active: rgba(249,115,22,0.13);
}

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

body {
  height: 100vh;
  font-family: 'Manrope', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(249,115,22,0.06), transparent 32%),
    radial-gradient(circle at bottom right, rgba(251,146,60,0.04), transparent 28%),
    var(--bg);
  display: flex;
  flex-direction: row;
  overflow: hidden;
}

.app {
  height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: row;
  overflow: hidden;
}

/* ── Topbar (slim, inside center column) ── */
.topbar {
  height: 56px;
  background: transparent;
  border-bottom: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  gap: 10px;
  flex-shrink: 0;
  position: relative;
  z-index: 20;
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.page-title {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-title strong {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.page-title span {
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(255,255,255,0.65);
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}
.icon-btn:hover { color: var(--text); border-color: var(--line-strong); background: rgba(255,255,255,0.9); }
.icon-btn svg { width: 16px; height: 16px; }
.icon-btn .theme-icon { display: none; }
.icon-btn[data-theme-state="light"] .theme-icon.sun { display: block; }
.icon-btn[data-theme-state="dark"] .theme-icon.moon { display: block; }

.status-pill {
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,0.65);
  border-radius: 999px;
  padding: 6px 11px;
  font-size: 12px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 7px;
}
.status-pill.stat-compact {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
}

body.right-canvas-open #model-pill,
body.right-canvas-open #system-pill {
  display: none !important;
}

body.right-canvas-open .sidebar:not(.collapsed) ~ .workspace .page-title {
  display: none !important;
}

body.right-canvas-open.browser-surface-active .page-title {
  display: none !important;
}

body.right-creative-canvas-open .page-title {
  display: none !important;
}

.dot { width: 8px; height: 8px; border-radius: 50%; background: #a9b4c5; }
.dot.online { background: var(--ok); box-shadow: 0 0 0 4px rgba(22,163,74,0.16); }
.dot.offline { background: var(--err); box-shadow: 0 0 0 4px rgba(220,38,38,0.14); }

/* Panel toggle (opens right drawer) */
.panel-toggle-btn {
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,0.65);
  color: var(--muted);
  border-radius: 10px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: .18s ease;
  flex-shrink: 0;
}
.panel-toggle-btn:hover { background: rgba(255,255,255,0.9); color: var(--text); }
.panel-toggle-btn.active {
  background: linear-gradient(145deg, #f97316, #c2410c);
  border-color: #ea580c;
  color: white;
  box-shadow: 0 4px 14px rgba(249,115,22,0.36);
}
.panel-toggle-btn svg { width: 16px; height: 16px; }

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  height: 100vh;
  background: var(--sidebar-bg);
  border-right: 1px solid rgba(249,115,22,0.20);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  transition: width .22s ease, min-width .22s ease;
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
  z-index: 100;
}

:root[data-theme="dark"] .sidebar,
:root[data-theme="dark"] .topbar {
  overflow: hidden;
  isolation: isolate;
  --pm-angle: 0deg;
  --pm-shell-spin: 20s;
  --pm-glow: rgba(249, 115, 22, 0.18);
  background:
    linear-gradient(
      135deg,
      rgba(20, 20, 19, 0.78),
      color-mix(in srgb, rgba(20, 20, 19, 0.78), transparent 14%)
    );
  border-color: rgba(255,255,255,0.08);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08),
    inset 0 0 0 1px rgba(255,255,255,0.08);
  backdrop-filter: blur(18px) saturate(1.12);
  -webkit-backdrop-filter: blur(18px) saturate(1.12);
}

:root[data-theme="dark"] .sidebar {
  overflow: visible;
  border-right-color: transparent;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08),
    inset 1px 0 0 rgba(255,255,255,0.08);
}

:root[data-theme="dark"] .topbar {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08);
}

:root[data-theme="dark"] .sidebar::before {
  inset: 0;
}

:root[data-theme="dark"] .sidebar::before,
:root[data-theme="dark"] .topbar::before {
  content: "";
  position: absolute;
  inset: -45%;
  z-index: 0;
  pointer-events: none;
  background:
    conic-gradient(
      from var(--pm-angle),
      transparent 0deg,
      color-mix(in srgb, #f97316, transparent 88%) 52deg,
      color-mix(in srgb, #f59e0b, transparent 92%) 95deg,
      transparent 150deg,
      color-mix(in srgb, #7c2d12, transparent 82%) 225deg,
      transparent 310deg,
      color-mix(in srgb, #fb5607, transparent 89%) 360deg
    );
  filter: blur(36px);
  opacity: 0.46;
  animation: prometheus-liquid-spin var(--pm-shell-spin) linear infinite;
}

:root[data-theme="dark"] .sidebar::after,
:root[data-theme="dark"] .topbar::after {
  content: "";
  position: absolute;
  inset: 0;
  padding: 1px;
  z-index: 0;
  pointer-events: none;
  background:
    conic-gradient(
      from var(--pm-angle),
      rgba(255,255,255,0.18),
      color-mix(in srgb, #f97316, transparent 58%),
      rgba(255,255,255,0.04),
      color-mix(in srgb, #f59e0b, transparent 70%),
      rgba(255,255,255,0.16)
    );
  mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  mask-composite: exclude;
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  opacity: 0.42;
  animation: prometheus-liquid-spin var(--pm-shell-spin) linear infinite;
}

:root[data-theme="dark"] .sidebar > *,
:root[data-theme="dark"] .topbar > * {
  position: relative;
  z-index: 1;
}

:root[data-theme="dark"] .sidebar:hover,
:root[data-theme="dark"] .topbar:hover,
:root[data-theme="dark"] .topbar:focus-within {
  --pm-glow: rgba(249, 115, 22, 0.24);
  box-shadow:
    0 0 24px var(--pm-glow),
    inset 0 1px 0 rgba(255,255,255,0.10),
    inset 0 0 0 1px rgba(255,255,255,0.10);
}

.sidebar.collapsed {
  width: 64px;
  min-width: 64px;
}

/* Hide sessions, pinned chats, and hamburger when sidebar collapsed */
.sidebar.collapsed #sidebar-sessions-section,
.sidebar.collapsed #sidebar-pinned-section {
  display: none !important;
}

.sidebar.collapsed #sidebarToggle {
  display: none !important;
}

/* Show hamburger only when sidebar is not collapsed */
.sidebar:not(.collapsed) #sidebarToggle {
  display: flex;
}

/* Fixed top: logo + new chat + search */
.sidebar-fixed {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 8px 6px;
  border-bottom: 1px solid rgba(249,115,22,0.10);
}

/* Scrollable body */
.sidebar-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: visible;
  padding: 8px 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(249,115,22,0.35) transparent;
}
.sidebar-scroll::-webkit-scrollbar { width: 4px; }
.sidebar-scroll::-webkit-scrollbar-thumb { background: rgba(249,115,22,0.35); border-radius: 999px; }

.sidebar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 2px 4px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.logo {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: transparent;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  overflow: hidden;
}
.logo img { width: 30px; height: 30px; object-fit: contain; display: block; }

.brand { gap: 8px; }
.brand-copy { min-width: 0; }
.brand-title { font-size: 13px; font-weight: 700; letter-spacing: -0.02em; white-space: nowrap; color: var(--sidebar-text); }
.brand-sub { font-size: 9px; color: var(--sidebar-muted); margin-top: 0; white-space: nowrap; }

.sidebar .icon-btn {
  background: var(--sidebar-icon-bg);
  border-color: var(--sidebar-icon-border);
  color: var(--sidebar-text);
}
.sidebar .icon-btn:hover { background: rgba(255,255,255,0.14); border-color: rgba(255,255,255,0.22); }

/* New chat button */
.new-chat {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--flame-border);
  background: rgba(249,115,22,0.10);
  border-radius: 10px;
  padding: 7px 10px;
  font-weight: 600;
  cursor: pointer;
  color: var(--sidebar-text);
  font-size: 12px;
  font-family: 'Manrope', sans-serif;
  box-shadow: 0 0 8px rgba(249,115,22,0.10);
  transition: .18s ease;
}
.new-chat:hover { background: rgba(249,115,22,0.18); border-color: var(--flame); }
.new-chat .nav-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 6px;
}

/* Search row in sidebar */
.sidebar-search {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--sidebar-search-bg);
  border: 1px solid rgba(255,255,255,0.08);
}
.sidebar-search input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--sidebar-text);
  font-size: 11px;
  font-family: 'Manrope', sans-serif;
  outline: none;
}
.sidebar-search input::placeholder { color: var(--sidebar-muted); }
.sidebar-search svg { color: var(--sidebar-muted); flex-shrink: 0; }

/* Nav group */
.nav-group { display: flex; flex-direction: column; gap: 2px; }
.section-title {
  padding: 8px 6px 4px;
  font-size: 9px;
  font-weight: 700;
  color: var(--sidebar-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* Nav items */
.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 6px 8px;
  cursor: pointer;
  transition: .15s ease;
  color: var(--sidebar-text);
  font-size: 12px;
  font-weight: 500;
  position: relative;
}
.nav-item:hover { background: var(--sidebar-item-hover); border-color: transparent; }
.nav-item.active {
  background: var(--sidebar-active-bg);
  border-color: transparent;
  box-shadow: none;
}

.nav-icon {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--sidebar-icon-bg);
  border: 1px solid var(--sidebar-icon-border);
  display: grid;
  place-items: center;
  color: var(--sidebar-text);
  flex-shrink: 0;
  font-size: 12px;
}
.nav-icon svg { width: 12px; height: 12px; }

/* Nav badge */
.nav-badge {
  margin-left: auto;
  min-width: 16px;
  height: 16px;
  border-radius: 8px;
  background: #e05c5c;
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  line-height: 16px;
  text-align: center;
  padding: 0 4px;
}

/* Segmented tabs */
.seg-tabs {
  display: flex;
  background: var(--sidebar-seg-bg);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 2px;
  gap: 2px;
}
.seg-btn {
  flex: 1;
  border: 1px solid transparent;
  background: transparent;
  color: var(--sidebar-muted);
  border-radius: 6px;
  padding: 4px 2px;
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: .18s ease;
  white-space: nowrap;
  text-align: center;
  font-family: 'Manrope', sans-serif;
}
.seg-btn.active {
  background: var(--sidebar-seg-active);
  border-color: var(--flame-border);
  color: var(--sidebar-text);
  box-shadow: 0 2px 8px rgba(249,115,22,0.12);
}
.seg-btn:hover:not(.active) { background: rgba(255,255,255,0.08); }

/* Session/item lists */
.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.session-list { display: flex; flex-direction: column; gap: 5px; }

.session-item,
.project-card,
.skill-card-v2 {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  border: 1px solid rgba(249,115,22,0.20);
  border-radius: 8px;
  padding: 7px 8px;
  cursor: pointer;
  transition: .18s ease;
  background: var(--sidebar-item-bg);
  box-shadow: 0 0 7px rgba(249,115,22,0.07);
  color: var(--sidebar-text);
}
.session-item:hover, .project-card:hover, .skill-card-v2:hover {
  background: var(--sidebar-item-hover);
  border-color: var(--flame);
  box-shadow: 0 0 12px rgba(249,115,22,0.18);
}
.session-item.active {
  background: var(--sidebar-active-bg);
  border-color: var(--flame-border);
  box-shadow: 0 0 12px rgba(249,115,22,0.18);
}

.session-icon, .project-icon, .skill-icon-v2 {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--sidebar-icon-bg);
  border: 1px solid var(--sidebar-icon-border);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--sidebar-muted);
}

.session-copy, .project-mini, .skill-copy-v2 { min-width: 0; flex: 1; }

.session-title, .project-name, .skill-name-v2 {
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--sidebar-text);
}

.session-meta, .project-meta, .skill-meta-v2 {
  font-size: 11px;
  color: var(--sidebar-muted);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* More popover (from nav "More" item) */
.nav-more-wrap { position: relative; }
.more-popover {
  position: fixed;
  width: 190px;
  background: #262626;
  border: 1px solid rgba(249,115,22,0.28);
  border-radius: 16px;
  box-shadow: 0 12px 36px rgba(0,0,0,0.40), 0 0 14px rgba(249,115,22,0.10);
  padding: 5px;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-6px);
  transition: opacity .16s ease, transform .16s ease;
}
.more-popover.open { opacity: 1; pointer-events: auto; transform: translateX(0); }
.more-popover-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  border-radius: 8px;
  border: 1px solid transparent;
  color: var(--sidebar-text);
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  transition: .15s ease;
  font-family: 'Manrope', sans-serif;
}
.more-popover-item:hover { background: rgba(255,255,255,0.08); border-color: rgba(249,115,22,0.30); }
.more-popover-item.active { background: var(--sidebar-active-bg); border-color: var(--flame-border); }

/* Sidebar footer */
.sidebar-footer {
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid rgba(249,115,22,0.18);
}

/* ── Workspace (center + right) ── */
.workspace {
  min-width: 0;
  flex: 1;
  height: 100vh;
  display: flex;
  flex-direction: row;
  overflow: hidden;
}

/* Center column */
.center-col {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

body.immersive-center-hidden .center-col {
  display: none;
}

/* Main shell wrap (the light grey panel) */
.main-shell-wrap {
  min-height: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #d8d6d2;
  border-left: none;
  overflow: hidden;
}

:root[data-theme="dark"] .main-shell-wrap {
  background: var(--panel);
}

/* Main shell (content area below topbar) */
main,
.main-shell {
  min-height: 0;
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Right panel (inline drawer) */
.right-panel {
  position: relative; /* canvas-panel absolute positioning is relative to this */
  width: 0;
  min-width: 0;
  height: 100vh;
  overflow: hidden;
  transition: width .24s ease, min-width .24s ease;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: #2e2e2e;
  border-left: 1px solid rgba(249,115,22,0.20);
  color: var(--sidebar-text);
  /* Always-dark CSS variable scope (overrides light theme vars for all descendants) */
  --panel:   #333333;
  --panel-2: #3d3d3d;
  --bg:      #2e2e2e;
  --bg-soft: #363636;
  --line:    rgba(255,255,255,0.09);
  --line-strong: rgba(255,255,255,0.15);
  --text:    #e8e6e1;
  --fg:      #e8e6e1;
  --muted:   #9a9890;
  --border:  rgba(255,255,255,0.09);
  /* Progress card dark values */
  --progress-bg:            linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.03) 100%);
  --progress-border:        rgba(255,255,255,0.10);
  --progress-shadow:        0 4px 16px rgba(0,0,0,0.25);
  --progress-header-text:   #e8e6e1;
  --progress-chevron:       #9a9890;
  --progress-empty-border:  rgba(255,255,255,0.10);
  --progress-empty-text:    #9a9890;
  --progress-empty-bg:      rgba(255,255,255,0.04);
  --progress-text-base:     #e8e6e1;
  --progress-text-pending:  #9a9890;
  --progress-text-done:     #666460;
  --progress-text-active:   #f1ede8;
  --progress-text-failed:   #f87171;
  --progress-dot-pending-bg:     rgba(255,255,255,0.07);
  --progress-dot-pending-text:   #9a9890;
  --progress-dot-pending-border: rgba(255,255,255,0.12);
  --progress-dot-done-bg:        #1f8fff;
  --progress-dot-done-text:      #f8fbff;
  --progress-dot-done-border:    #3da1ff;
  --progress-dot-failed-bg:      #8b1f2f;
  --progress-dot-failed-text:    #fff0f2;
  --progress-dot-failed-border:  #b43a4f;
  --progress-dot-active-bg:      rgba(249,115,22,0.12);
  --progress-dot-active-text:    #f97316;
  --progress-dot-active-border:  rgba(249,115,22,0.40);
  --progress-spinner-track: rgba(61,161,255,0.22);
  --progress-spinner-head:  #3da1ff;
  /* Log */
  --log-bg:   rgba(0,0,0,0.28);
  --log-text: #9aa8b8;
  --log-info: #82adff;
}
.right-panel.open {
  width: var(--right-w);
  min-width: var(--right-w);
  overflow-y: auto;
  overflow-x: hidden;
}
.right-panel.open.canvas-open {
  overflow: hidden;
}
.right-panel.open.canvas-open > *:not(#canvas-panel):not(.rp-resize-handle) {
  display: none !important;
}

/* Right panel resize handle */
.rp-resize-handle {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  cursor: col-resize;
  z-index: 100;
  background: transparent;
  transition: background .18s ease;
}
.rp-resize-handle:hover,
.rp-resize-handle.dragging {
  background: rgba(249,115,22,0.40);
}

/* Collapsed sidebar states */
.sidebar.collapsed .brand-copy,
.sidebar.collapsed .new-chat span,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .section-title,
.sidebar.collapsed .sidebar-search,
.sidebar.collapsed .session-copy,
.sidebar.collapsed .seg-tabs,
.sidebar.collapsed .project-mini,
.sidebar.collapsed .skill-copy-v2,
.sidebar.collapsed .sidebar-footer .nav-item span {
  display: none;
}
.sidebar.collapsed .new-chat { justify-content: center; padding: 10px 0; border-radius: 12px; }
.sidebar.collapsed .sidebar-top { justify-content: center; padding-left: 0; padding-right: 0; }
.sidebar.collapsed .nav-item { justify-content: center; }
.sidebar.collapsed .session-item, .sidebar.collapsed .project-card { width: 44px; padding: 8px; justify-content: center; }

/* sidebar action btn (used in old code but kept for compat) */
.sidebar-action {
  border: 1px solid rgba(255,255,255,0.15);
  background: var(--sidebar-icon-bg);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 11px;
  color: var(--sidebar-text);
  cursor: pointer;
  font-family: 'Manrope', sans-serif;
  transition: .15s ease;
}
.sidebar-action:hover { background: rgba(255,255,255,0.14); }

/* Keep old mode-btn for compatibility but hide it */
.mode-toggle { display: none !important; }
.mode-btn { display: none; }
.more-menu { display: none; }
.status-bar { display: none; }
:root[data-theme="dark"] .sidebar-action { background: var(--panel); color: var(--text); }

:root[data-theme="dark"] #settings-modal > div {
  background: var(--panel) !important;
  color: var(--text);
  border-color: var(--line) !important;
}
:root[data-theme="dark"] .topbar {
  border-bottom-color: rgba(255,255,255,0.08);
}
:root[data-theme="dark"] .main-shell-wrap { background: #1f1f1f; }
:root[data-theme="dark"] .icon-btn,
:root[data-theme="dark"] .panel-toggle-btn {
  background:
    linear-gradient(
      145deg,
      rgba(255,255,255,0.075),
      rgba(255,255,255,0.035)
    );
  border-color: rgba(255,255,255,0.11);
  color: #e8e6e1;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.10),
    0 8px 18px rgba(0,0,0,0.16);
}
:root[data-theme="dark"] .icon-btn:hover,
:root[data-theme="dark"] .panel-toggle-btn:hover {
  background: rgba(249,115,22,0.11);
  border-color: rgba(249,115,22,0.34);
  color: #ffffff;
}
:root[data-theme="dark"] .status-pill {
  background: rgba(255,255,255,0.055);
  border-color: rgba(255,255,255,0.10);
  color: #b9b4ac;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
}
:root[data-theme="dark"] main { background: transparent; }
:root[data-theme="dark"] .job-item,
:root[data-theme="dark"] .skill-item,
:root[data-theme="dark"] .skill-result,
:root[data-theme="dark"] .task-card,
:root[data-theme="dark"] .approval-card,
:root[data-theme="dark"] .progress-card,
:root[data-theme="dark"] .artifact-card,
:root[data-theme="dark"] .artifact-preview {
  background: var(--panel-2);
  border-color: var(--line);
}
:root[data-theme="dark"] .msg {
  /* dark theme message styling */
}
:root[data-theme="dark"] .msg-body {
  background: rgba(90,90,90,0.6);
  border-color: var(--line);
  color: #e8edf6;
}
:root[data-theme="dark"] .msg.user .msg-body {
  background: #2e2e2e;
  color: #ffffff;
  border-color: var(--flame-border, rgba(249,115,22,0.45));
}
:root[data-theme="dark"] .msg-role { color: #c1cde0; }
:root[data-theme="dark"] .msg-channel-tag { color: #95a9c5; opacity: 0.9; }
:root[data-theme="dark"] .msg-content { color: #e8edf6; }
:root[data-theme="dark"] .msg.user .msg-content { color: #ffffff; }
:root[data-theme="dark"] .msg.user .msg-avatar { background: #2a4a7c; border-color: #5a7fafd; }
:root[data-theme="dark"] .msg-action-btn { color: #9aa4b2; }
:root[data-theme="dark"] .msg-action-btn:hover:not(:disabled) {
  background: rgba(255,255,255,0.08);
  color: #f4f7fb;
}
:root[data-theme="dark"] .msg-edit-btn { border-color: rgba(255,255,255,0.18); }
:root[data-theme="dark"] .msg-edit-btn-primary {
  background: #f4f4f5;
  border-color: #f4f4f5;
  color: #18181b;
}
:root[data-theme="dark"] .chat-welcome h2 { color: #c8dbff; }
:root[data-theme="dark"] .progress-card {
  background: var(--progress-bg);
  border-color: var(--progress-border);
}
:root[data-theme="dark"] #process-log,
:root[data-theme="dark"] #log-panel {
  background: var(--log-bg);
  border-color: var(--line);
  color: var(--log-text);
}
:root[data-theme="dark"] .log-line { color: var(--log-text); }
:root[data-theme="dark"] .log-line.info { color: var(--log-info); }
:root[data-theme="dark"] .mission-bar {
  background: linear-gradient(180deg, #313947, #2a313d);
}
:root[data-theme="dark"] .chat-input-area {
  background: #272f3d;
  border-color: #3a4455;
  box-shadow: 0 4px 28px rgba(0,0,0,0.35), 0 1px 4px rgba(0,0,0,0.2);
}
:root[data-theme="dark"] .queued-prompts-panel {
  background: linear-gradient(180deg, #2c3442, #272f3a);
}
:root[data-theme="dark"] .queued-item {
  background: var(--panel);
  border-color: var(--line);
  color: var(--text);
}
:root[data-theme="dark"] .queued-item-btn,
:root[data-theme="dark"] .queued-clear-btn {
  background: var(--panel-2);
  border-color: var(--line);
  color: var(--text);
}
:root[data-theme="dark"] .skill-card.enabled .skill-card-dot {
  background: #31b884;
  box-shadow: 0 0 0 3px rgba(49, 184, 132, 0.22);
}
:root[data-theme="dark"] .skill-mini-btn {
  background: var(--panel);
  border-color: var(--line);
  color: #c8d4e8;
}
:root[data-theme="dark"] .skill-mini-btn:hover {
  border-color: #64738e;
  color: #e8edf6;
}
:root[data-theme="dark"] .skill-remove-btn { color: #aeb9cc; }
:root[data-theme="dark"] .skill-remove-btn:hover { color: #f09999; }
:root[data-theme="dark"] .toggle-track {
  background: #3a4454;
  border-color: #546177;
}
:root[data-theme="dark"] .toggle-track::after { background: #b6c2d8; }
:root[data-theme="dark"] .toggle-switch input:checked + .toggle-track {
  background: #334c77;
  border-color: #4b73b3;
}
:root[data-theme="dark"] #chat-input,
:root[data-theme="dark"] #mission-input,
:root[data-theme="dark"] #skill-search-input {
  background: var(--panel-2);
  border-color: rgba(0,0,0,0.04);
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.10);
}
:root[data-theme="dark"] #chat-input::placeholder,
:root[data-theme="dark"] #mission-input::placeholder,
:root[data-theme="dark"] #skill-search-input::placeholder {
  color: #a9b5ca;
}
:root[data-theme="dark"] #settings-modal input,
:root[data-theme="dark"] #settings-modal select,
:root[data-theme="dark"] #settings-modal textarea,
:root[data-theme="dark"] .settings-input {
  background: var(--panel-2) !important;
  color: var(--text) !important;
  border-color: var(--line) !important;
}
:root[data-theme="dark"] #settings-modal [style*="background:#fff"],
:root[data-theme="dark"] #settings-modal [style*="background: #fff"] {
  background: var(--panel-2) !important;
  color: var(--text) !important;
}
:root[data-theme="dark"] #settings-modal [style*="linear-gradient(180deg,#fff"],
:root[data-theme="dark"] #settings-modal [style*="linear-gradient(180deg, #fff"] {
  background: linear-gradient(180deg, #323a47 0%, #2b3340 100%) !important;
}
:root[data-theme="dark"] #settings-modal #tg-status-bar {
  background: #2a313d !important;
  border: 1px solid var(--line);
}
:root[data-theme="dark"] #settings-modal .info-row {
  border-bottom-color: var(--line);
}
:root[data-theme="dark"] #settings-modal button[style*="background:#fff"],
:root[data-theme="dark"] #settings-modal button[style*="background: #fff"] {
  background: var(--panel) !important;
  color: var(--text) !important;
  border-color: var(--line) !important;
}
:root[data-theme="dark"] #settings-modal code {
  background: #232a35 !important;
  color: #d8e2f1;
}
:root[data-theme="dark"] .CodeMirror {
  background: #1f242d;
  color: #e8edf6;
}
:root[data-theme="dark"] .CodeMirror-gutters {
  background: #232a35;
  border-right: 1px solid var(--line);
}

/* ─── Page views: fill center column ─────────────────────────── */
/* These views overlay the center column at body level (position:fixed) */
.page-view {
  position: fixed !important;
  top: 56px !important;
  bottom: 0 !important;
  left: 288px !important;
  right: 0 !important;
  z-index: 5;
  background: #d8d6d2;
  overflow: hidden;
  border-radius: 0;
  border: none;
}
.sidebar.collapsed ~ .workspace .page-view,
.page-view.sidebar-collapsed {
  left: 64px !important;
}
:root[data-theme="dark"] .page-view { background: var(--panel); }

/* ─── Panel Collapse Toggle Buttons ─────────────────────────── */
.panel-collapse-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 52px;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 15;
  transition: color 0.15s ease, background 0.15s ease;
  flex-shrink: 0;
}
.panel-collapse-btn:hover {
  color: var(--brand);
  background: rgba(22, 104, 227, 0.08);
}
:root[data-theme="dark"] .panel-collapse-btn:hover {
  background: rgba(76, 141, 255, 0.12);
}

/* Sidebar toggle: sits at right inner edge of aside */
.sidebar-collapse-btn {
  right: 4px;
}
/* Right panel toggle: sits at left inner edge of .right-panel */
.right-collapse-btn {
  left: 4px;
}

/* Arrow direction — sidebar: ‹ open → › collapsed */
.sidebar-collapse-btn svg {
  transform: rotate(0deg);
  transition: transform 0.28s ease;
}
body.left-collapsed .sidebar-collapse-btn svg {
  transform: rotate(180deg);
}

/* Arrow direction — right panel: › open → ‹ collapsed */
.right-collapse-btn svg {
  transform: rotate(0deg);
  transition: transform 0.28s ease;
}
body.right-collapsed .right-collapse-btn svg {
  transform: rotate(180deg);
}

/* Sidebar inner content wrapper */
.sidebar-inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: opacity 0.18s ease;
}
body.left-collapsed .sidebar-inner {
  opacity: 0;
  pointer-events: none;
}

/* Right panel content fade when collapsed */
.right-panel:not(.open) > *:not(.panel-collapse-btn) {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}