:root {
  --bg: #11161d;
  --panel: #171d25;
  --panel-2: #1d2530;
  --panel-3: #202a36;
  --ink: #edf2f7;
  --muted: #95a2b3;
  --line: rgba(173, 189, 204, 0.14);
  --accent: #4fb3ff;
  --accent-soft: rgba(79, 179, 255, 0.16);
  --success: #6ecb8b;
  --status: #10151b;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
  --sidebar-width: 280px;
  --assistant-width: 360px;
  color-scheme: dark;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at top left, rgba(79, 179, 255, 0.12), transparent 26%),
    radial-gradient(circle at bottom right, rgba(110, 203, 139, 0.12), transparent 24%),
    linear-gradient(180deg, #0b1016 0%, #121922 100%);
  color: var(--ink);
}

body {
  overflow: hidden;
}

button {
  font: inherit;
}

.app {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: rgba(17, 22, 29, 0.96);
}

.window-titlebar {
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent), var(--panel);
  border-bottom: 1px solid var(--line);
  -webkit-app-region: drag;
  app-region: drag;
}

.window-titlebar-menu-bar,
.window-titlebar-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  -webkit-app-region: no-drag;
  app-region: no-drag;
}

.window-titlebar-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.window-titlebar-menu-button,
.window-titlebar-action-button,
.panel-tab,
.tab,
.sidebar-item,
.activity-bar-item {
  border: none;
  cursor: pointer;
}

.window-titlebar-menu-button,
.window-titlebar-action-button {
  min-height: 26px;
  padding: 0 10px;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
}

.window-titlebar-menu-button:hover,
.window-titlebar-action-button:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
}

.app-main {
  flex: 1;
  display: flex;
  min-height: 0;
}

.activity-bar {
  width: 56px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: #0d1319;
  border-right: 1px solid var(--line);
}

.activity-bar-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 0;
  gap: 4px;
}

.activity-bar-item {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: transparent;
  color: var(--muted);
  border-radius: 12px;
  position: relative;
}

.activity-bar-item:hover,
.activity-bar-item.active {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.06);
}

.activity-bar-item.active::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 999px;
  background: var(--accent);
}

.activity-bar-glyph {
  font-size: 12px;
  font-weight: 700;
}

.sidebar-shell,
.assistant-sidebar-shell {
  display: flex;
  min-width: 0;
}

.sidebar-shell {
  width: var(--sidebar-width);
}

.assistant-sidebar-shell {
  width: var(--assistant-width);
}

.sidebar,
.assistant-sidebar,
.panel-shell,
.editor-shell {
  background: var(--panel);
}

.sidebar,
.assistant-sidebar {
  width: 100%;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sidebar {
  border-right: 1px solid var(--line);
}

.assistant-sidebar {
  border-left: 1px solid var(--line);
}

.resizable-panel-divider {
  width: 1px;
  background: var(--line);
}

.sidebar-shell.is-hidden,
.assistant-sidebar-shell.is-hidden {
  width: 0;
  overflow: hidden;
}

.sidebar-shell.is-hidden .resizable-panel-divider,
.assistant-sidebar-shell.is-hidden .resizable-panel-divider {
  display: none;
}

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

.tab-bar {
  height: 40px;
  display: flex;
  align-items: center;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
  padding: 0 10px;
}

.tab-bar-tabs {
  display: flex;
  align-items: stretch;
  gap: 6px;
  overflow-x: auto;
}

.tab-bar-empty {
  font-size: 12px;
  color: var(--muted);
}

.tab {
  min-width: 140px;
  max-width: 200px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--panel);
  color: var(--muted);
  border-radius: 10px 10px 0 0;
}

.tab.active {
  color: var(--ink);
  background: #121922;
  box-shadow: inset 0 2px 0 var(--accent);
}

.tab.transient .tab-title {
  font-style: italic;
}

.tab-title,
.sidebar-item strong,
.sidebar-item span,
.status-bar-item {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tab-close {
  font-size: 11px;
  color: var(--muted);
}

.editor-shell {
  flex: 1;
  min-height: 0;
  padding: 22px;
  overflow: auto;
}

.editor-frame {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 20px;
}

.editor-main,
.editor-meta-card,
.assistant-card,
.panel-entry,
.dashboard-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent), var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.editor-main {
  padding: 24px;
}

.editor-kicker,
.sidebar-eyebrow,
.sidebar-section-header,
.assistant-header,
.panel-header,
.sidebar-subtitle {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.editor-title {
  margin: 10px 0 8px;
  font-size: 34px;
  line-height: 1.1;
}

.editor-subtitle {
  margin: 0 0 22px;
  color: var(--muted);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.dashboard-card {
  padding: 18px;
}

.dashboard-card span,
.assistant-card span,
.panel-entry span,
.editor-meta-card span,
.sidebar-item span,
.sidebar-subtitle {
  color: var(--muted);
}

.dashboard-card strong {
  display: block;
  margin: 8px 0;
  font-size: 32px;
}

.editor-section {
  margin-top: 22px;
}

.editor-section ul {
  margin: 12px 0 0;
  padding-left: 18px;
}

.editor-toolbar {
  display: flex;
  gap: 10px;
}

.editor-toolbar button {
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-3);
  color: var(--ink);
}

.editor-meta {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.editor-meta-card,
.assistant-card,
.panel-entry {
  padding: 16px;
}

.sidebar-header,
.assistant-header,
.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.sidebar-content,
.assistant-content,
.panel-content {
  flex: 1;
  overflow: auto;
  min-height: 0;
}

.sidebar-section {
  padding: 14px 14px 0;
}

.sidebar-section-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}

.sidebar-section-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  width: 100%;
  padding: 12px;
  border-radius: 14px;
  background: var(--panel-2);
  color: var(--ink);
}

.sidebar-item:hover,
.panel-tab:hover {
  background: var(--accent-soft);
}

.sidebar-item.active {
  outline: 1px solid var(--accent);
  background: rgba(79, 179, 255, 0.12);
}

.sidebar-badge {
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(110, 203, 139, 0.16);
  color: var(--success);
  font-size: 11px;
}

.panel-shell {
  min-height: 160px;
  max-height: 160px;
  border-top: 1px solid var(--line);
}

.panel-shell.is-hidden {
  display: none;
}

.panel-tabs {
  display: flex;
  gap: 8px;
}

.panel-tab {
  padding: 8px 10px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
}

.panel-tab.active {
  background: var(--accent-soft);
  color: var(--ink);
}

.assistant-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
}

.status-bar {
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 12px;
  background: var(--status);
  border-top: 1px solid var(--line);
}

.status-bar-left,
.status-bar-right {
  display: flex;
  gap: 8px;
  min-width: 0;
}

.status-bar-item {
  max-width: 180px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 11px;
}

@media (max-width: 1100px) {
  .editor-frame {
    grid-template-columns: 1fr;
  }

  .assistant-sidebar-shell {
    display: none;
  }

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