/* =============================================================================
   TERMINAL SHELL STYLES
   Layout, pill header, grid, viewport, auth screen, toasts.
   Zero hardcoded colors — all via Chiaroscuro tokens.
   ============================================================================= */

/* ── App Layout ────────────────────────────────────────────────────────────── */

#app {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4);
}

/* ── App Header (Clockwork-style nav bar) ──────────────────────────────────── */

#app-header {
  margin-bottom: var(--space-4);
}

.app-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-5);
  margin-top: var(--space-4);
  margin-bottom: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.app-nav__brand-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  position: relative;
}

.app-nav__brand {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-white);
  text-decoration: none;
  letter-spacing: -0.04em;
}

.app-nav__brand:hover {
  color: var(--color-blue);
}

.app-nav__brand:focus-visible {
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-blue-glow);
  border-radius: var(--radius-xs);
}

.app-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.app-nav__link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: var(--font-weight-medium);
  padding: var(--space-2) var(--space-3);
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius-xs);
}

.app-nav__link:hover {
  color: var(--color-text);
  filter: brightness(1.3);
}

.app-nav__link:active {
  opacity: 0.8;
}

.app-nav__link:focus-visible {
  box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 4px var(--color-blue-glow);
}

.app-nav__link.active {
  color: var(--color-text);
  background: radial-gradient(ellipse at bottom, var(--white-8) 0%, var(--white-5) 80%);
}

.app-nav__settings {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-left: var(--space-2);
  padding-right: var(--space-2);
}

.app-nav__settings svg {
  width: 16px;
  height: 16px;
}

.app-nav__settings:hover {
  color: var(--color-text);
  filter: brightness(1.3);
}

/* ── Version Dropdown ──────────────────────────────────────────────────────── */

.version-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 220px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-3);
  padding: var(--space-2);
  z-index: 100;
}

.version-dropdown__header {
  font-size: 11px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-2) var(--space-3);
}

.version-dropdown__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-xs);
}

.version-dropdown__item:hover {
  background: var(--color-surface-hover);
}

.version-dropdown__name {
  font-size: 13px;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.version-dropdown__ver {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-text-muted);
}

/* ── Module Grid ───────────────────────────────────────────────────────────── */

#grid {
  flex: 1;
  padding-bottom: var(--space-8);
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.grid-cell {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 200px;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  position: relative;
}

.grid-cell:hover {
  border-color: var(--color-border-strong);
  filter: brightness(1.3);
  box-shadow: var(--shadow-2);
}

.grid-cell:focus-visible {
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-blue-glow);
}

.grid-cell:active {
  transform: scale(0.98);
}

.grid-cell[data-size="1"] { grid-column: span 1; }
.grid-cell[data-size="2"] { grid-column: span 2; }

/* Drag states */
.grid-cell.dragging { opacity: 0.4; }
.grid-cell.drag-over { border-color: var(--color-blue); border-style: dashed; }

/* Placeholder cells (LG, PM) */
.grid-cell.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
}
.grid-cell.placeholder:hover {
  border-color: var(--color-border);
  box-shadow: none;
  transform: none;
}

.placeholder-tag {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-disabled);
  opacity: 0.3;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Cell header */
.cell-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
}
.cell-header .cell-icon { font-size: var(--font-size-base); }
.cell-header .cell-name { flex: 1; }

.cell-content {
  padding: var(--space-4);
}

/* Legacy placeholder (used in settings/design stubs) */
.grid-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-align: center;
  gap: var(--space-3);
}

.grid-placeholder-icon {
  font-size: var(--font-size-3xl);
  opacity: 0.5;
}

/* ── Viewport (full module view) ───────────────────────────────────────────── */

#viewport {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  background: var(--color-bg);
  overflow-y: auto;
}

#viewport.expanding {
  animation: viewport-expand 250ms ease-out forwards;
}
#viewport.collapsing {
  animation: viewport-collapse 250ms ease-in forwards;
}

@keyframes viewport-expand {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes viewport-collapse {
  from { opacity: 1; transform: scale(1); }
  to { opacity: 0; transform: scale(0.95); }
}

.viewport-module-host {
  min-height: 100%;
}

/* ── Auth Screen ───────────────────────────────────────────────────────────── */

#auth-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  z-index: 100;
}

.auth-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-4);
  max-width: 420px;
  padding: var(--space-8);
}

.auth-content h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  letter-spacing: -0.04em;
}

.auth-status {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.auth-instructions {
  color: var(--color-text-placeholder);
  font-size: var(--font-size-sm);
  max-width: 65ch;
}

.auth-content code {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-blue);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.auth-retry-btn {
  margin-top: var(--space-2);
}

.auth-spinner {
  margin-bottom: var(--space-2);
}

/* ── Toast Container ───────────────────────────────────────────────────────── */

#toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: 200;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-3);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  min-width: 280px;
  max-width: 420px;
  animation: toast-in var(--transition-normal) ease forwards;
}

.toast-success {
  border-left: 3px solid var(--color-success);
}

.toast-error {
  border-left: 3px solid var(--color-error);
}

.toast-warning {
  border-left: 3px solid var(--color-warning);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(var(--space-4));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(var(--space-4));
  }
}

/* ── Rich Toast (from toast.js) ───────────────────────────────────────────── */

.toast-rich {
  flex-direction: row;
  align-items: flex-start;
  gap: var(--space-3);
}

.toast-info {
  border-left: 3px solid var(--color-info);
}

.toast-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--space-5);
  height: var(--space-5);
  margin-top: 2px;
}

.toast-success .toast-icon { color: var(--color-success); }
.toast-error .toast-icon { color: var(--color-error); }
.toast-warning .toast-icon { color: var(--color-warning); }
.toast-info .toast-icon { color: var(--color-info); }

.toast-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.toast-title {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: var(--line-height-snug);
}

.toast-body {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
}

.toast-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.toast-action-btn {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-blue);
  background: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.toast-action-btn:hover {
  filter: brightness(1.3);
  background: var(--color-surface-hover);
  color: var(--color-blue-hover);
}

.toast-action-btn:focus-visible {
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-blue-glow);
}

.toast-action-btn:active {
  transform: scale(0.97);
}

.toast-dismiss {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--space-6);
  height: var(--space-6);
  padding: 0;
  margin-top: -2px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-text-placeholder);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toast-dismiss:hover {
  color: var(--color-text);
  filter: brightness(1.3);
  background: var(--color-surface-hover);
}

.toast-dismiss:focus-visible {
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-blue-glow);
}

.toast-dismiss:active {
  transform: scale(0.97);
}

.toast-exiting {
  animation: toast-out 150ms ease forwards;
}

/* ── Command Palette ──────────────────────────────────────────────────────── */

.palette-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 20dvh;
  background: var(--color-overlay);
  animation: palette-backdrop-in 150ms ease forwards;
}

.palette-overlay.palette-exiting {
  animation: palette-backdrop-out 150ms ease forwards;
}

.palette-overlay.palette-exiting .palette-panel {
  animation: palette-panel-out 150ms ease forwards;
}

@keyframes palette-backdrop-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes palette-backdrop-out {
  from { opacity: 1; }
  to { opacity: 0; }
}

.palette-panel {
  width: 100%;
  max-width: 560px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-3);
  overflow: hidden;
  animation: palette-panel-in 200ms ease forwards;
}

@keyframes palette-panel-in {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(calc(-1 * var(--space-2)));
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes palette-panel-out {
  from {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
  to {
    opacity: 0;
    transform: scale(0.95) translateY(calc(-1 * var(--space-2)));
  }
}

.palette-search-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.palette-search-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  color: var(--color-text-placeholder);
}

.palette-search {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  color: var(--color-text);
  line-height: var(--line-height-normal);
}

.palette-search::placeholder {
  color: var(--color-text-placeholder);
}

.palette-results {
  max-height: 320px;
  overflow-y: auto;
  padding: var(--space-2);
}

.palette-result {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.palette-result:hover,
.palette-result.selected {
  background: var(--color-surface-hover);
}

.palette-result-icon {
  flex-shrink: 0;
  width: var(--space-6);
  text-align: center;
  font-size: var(--font-size-lg);
}

.palette-result-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.palette-result-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  line-height: var(--line-height-snug);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.palette-result-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-placeholder);
  line-height: var(--line-height-normal);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.palette-result-type {
  flex-shrink: 0;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-disabled);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.palette-empty {
  padding: var(--space-8) var(--space-4);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-placeholder);
}

/* ── Palette Remote Search ──────────────────────────────────────────────── */

.palette-search-divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  margin-top: var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-top: 1px solid var(--color-border);
}

.palette-search-result .palette-result-icon {
  opacity: 0.8;
}

.palette-search-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-placeholder);
  animation: palette-search-pulse 1.5s ease-in-out infinite;
}

@keyframes palette-search-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ── Update Banner ────────────────────────────────────────────────────────── */

#update-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-raised);
  border-bottom: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-2);
  animation: update-banner-in 200ms ease forwards;
}

@keyframes update-banner-in {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.update-banner-text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.update-banner-btn {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-white);
  background: radial-gradient(ellipse at bottom, var(--color-blue-light) 0%, var(--color-blue) 80%);
  border: 1px solid var(--white-15);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.update-banner-btn:hover {
  filter: brightness(1.2);
  border-color: var(--white-20);
}

.update-banner-btn:focus-visible {
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-blue-glow);
}

.update-banner-btn:active {
  transform: scale(0.97);
}

.update-banner-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ── Responsive ────────────────────────────────────────────────────────────── */

@media (max-width: 1024px) {
  .module-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  #app {
    padding: var(--space-3);
  }

  .app-nav {
    margin-top: var(--space-2);
    margin-bottom: var(--space-2);
    padding: var(--space-2) var(--space-3);
  }

  .module-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .grid-cell[data-size="2"] {
    grid-column: span 2;
  }

  #toast-container {
    right: var(--space-3);
    bottom: var(--space-3);
    left: var(--space-3);
  }

  .toast {
    min-width: unset;
    max-width: unset;
  }

  .palette-overlay {
    padding-top: var(--space-4);
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }

  .palette-panel {
    max-width: unset;
  }
}

@media (max-width: 480px) {
  #app {
    padding: var(--space-2);
  }

  .app-nav {
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-3);
  }

  .app-nav__links {
    flex-wrap: wrap;
    justify-content: center;
  }

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

  .grid-cell[data-size="2"] {
    grid-column: span 1;
  }

  .auth-content {
    padding: var(--space-4);
  }
}

/* =============================================================================
   SETTINGS PAGE
   ============================================================================= */

.settings-page {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-4);
}

.settings-header {
  margin-bottom: var(--space-8);
}

.settings-header h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  letter-spacing: -0.04em;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-2);
}

.settings-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

.settings-sections {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* ── Settings Section Card ────────────────────────────────────────────────── */

.settings-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.settings-section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

/* ── Settings Row ─────────────────────────────────────────────────────────── */

.settings-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

.settings-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.settings-row:first-of-type {
  padding-top: 0;
}

.settings-row-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
  flex: 1;
}

.settings-row-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  line-height: var(--line-height-normal);
}

.settings-row-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
}

/* ── Module Visibility Toggles ────────────────────────────────────────────── */

.settings-module-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
  width: 100%;
}

.settings-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-element);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  cursor: default;
  transition: all var(--transition-fast);
}

.settings-toggle input[type="checkbox"] {
  accent-color: var(--color-blue);
  width: var(--space-4);
  height: var(--space-4);
}

.settings-toggle-label {
  white-space: nowrap;
}

/* ── Session Info ─────────────────────────────────────────────────────────── */

.settings-session-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  margin-bottom: var(--space-3);
}

.settings-session-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.settings-session-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  min-width: 80px;
}

.settings-session-value {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-text);
  background: var(--color-surface-element);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  word-break: break-all;
}

/* ── Radio Group ──────────────────────────────────────────────────────────── */

.settings-radio-group {
  display: inline-flex;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: 0;
  padding: 0;
  flex-shrink: 0;
}

.settings-radio {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
  border-right: 1px solid var(--color-border);
  user-select: none;
  min-height: 36px;
}

.settings-radio:last-child {
  border-right: none;
}

.settings-radio:hover {
  color: var(--color-text);
  background: var(--color-surface-hover);
}

.settings-radio:focus-within {
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-blue-glow);
  z-index: 1;
}

.settings-radio--active {
  color: var(--color-text-white);
  background: var(--color-blue);
}

.settings-radio--active:hover {
  background: var(--color-blue-hover);
  color: var(--color-text-white);
}

/* ── Shortcuts Table ──────────────────────────────────────────────────────── */

.settings-table {
  width: 100%;
  border-collapse: collapse;
}

.settings-table th {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border-strong);
}

.settings-table td {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.settings-table tbody tr:last-child td {
  border-bottom: none;
}

.settings-table tbody tr:hover {
  background: var(--color-surface-hover);
}

.settings-kbd {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.9em;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  background: var(--color-surface-element);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-2);
  white-space: nowrap;
}

.settings-scope {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: capitalize;
}

/* =============================================================================
   DESIGN WORKBENCH
   ============================================================================= */

.workbench-page {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-4);
}

.workbench-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-16) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.workbench-header {
  margin-bottom: var(--space-8);
}

.workbench-header-text h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  letter-spacing: -0.04em;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-2);
}

.workbench-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
}

/* ── Workbench Controls ───────────────────────────────────────────────────── */

.workbench-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ── Workbench Sections ───────────────────────────────────────────────────── */

.workbench-sections {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.workbench-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.workbench-section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.workbench-group-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: var(--line-height-normal);
}

.workbench-subsection {
  margin-top: var(--space-5);
}

.workbench-subsection:first-child {
  margin-top: 0;
}

/* ── Color Token Rows ─────────────────────────────────────────────────────── */

.workbench-color-group {
  margin-bottom: var(--space-5);
}

.workbench-color-group:last-child {
  margin-bottom: 0;
}

.workbench-color-group > .workbench-group-title {
  margin-bottom: var(--space-3);
}

.workbench-color-rows {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.token-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.token-row:hover {
  background: var(--color-surface-hover);
}

.token-row--overridden {
  background: var(--color-surface-hover);
  border-left: 2px solid var(--color-blue);
}

.token-swatch {
  width: var(--space-8);
  height: var(--space-8);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-strong);
  flex-shrink: 0;
  transition: background-color var(--transition-fast);
}

.token-color-picker {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

.token-name {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-text-muted);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.token-input {
  width: 120px;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: var(--space-1) var(--space-2);
  min-height: 32px;
}

/* ── Typography Samples ───────────────────────────────────────────────────── */

.type-sample {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

.type-sample:last-of-type {
  border-bottom: none;
}

.type-sample-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-2);
}

.type-sample-preview {
  color: var(--color-text);
}

.workbench-weight-ref {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.type-weight-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin-top: var(--space-3);
  font-size: var(--font-size-lg);
  color: var(--color-text);
}

/* ── Spacing Rulers ───────────────────────────────────────────────────────── */

.spacing-rulers {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.spacing-ruler {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.spacing-ruler-label {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-text-muted);
  min-width: 200px;
  flex-shrink: 0;
}

.spacing-ruler-bar {
  height: var(--space-5);
  background: var(--color-blue);
  border-radius: var(--radius-sm);
  min-width: var(--space-1);
  transition: width var(--transition-fast);
}

/* ── Border Radius Preview ────────────────────────────────────────────────── */

.radius-preview-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
}

.radius-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.radius-preview-box {
  width: var(--space-16);
  height: var(--space-16);
  background: var(--color-surface-element);
  border: 1px solid var(--color-border-strong);
}

.radius-preview-label {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-text-muted);
  text-align: center;
}

/* ── Shadow Preview ───────────────────────────────────────────────────────── */

.shadow-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
}

.shadow-preview {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
}

.shadow-preview-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  text-align: center;
}

.shadow-preview-label code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-text);
}

.shadow-preview-label span {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ── Component Preview ────────────────────────────────────────────────────── */

.preview-card {
  background: var(--color-surface-hover);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
}

.preview-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.preview-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.preview-form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.preview-form-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* =============================================================================
   RESPONSIVE — Settings & Workbench
   ============================================================================= */

@media (max-width: 768px) {
  .settings-page,
  .workbench-page {
    padding: var(--space-6) var(--space-3);
  }

  .settings-row {
    flex-direction: column;
    gap: var(--space-3);
  }

  .settings-radio-group {
    width: 100%;
  }

  .settings-radio {
    flex: 1;
    text-align: center;
  }

  .token-row {
    flex-wrap: wrap;
  }

  .token-name {
    flex-basis: 100%;
    order: 3;
  }

  .token-input {
    width: 100px;
  }

  .spacing-ruler {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }

  .spacing-ruler-label {
    min-width: unset;
  }

  .preview-form-grid {
    grid-template-columns: 1fr;
  }

  .shadow-preview-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .settings-page,
  .workbench-page {
    padding: var(--space-4) var(--space-2);
  }

  .settings-section,
  .workbench-section {
    padding: var(--space-4);
  }

  .workbench-controls {
    flex-direction: column;
  }

  .shadow-preview-grid {
    grid-template-columns: 1fr;
  }

  .radius-preview-grid {
    justify-content: center;
  }
}

/* ── Reduced Motion ───────────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .toast,
  .toast-exiting,
  .palette-overlay,
  .palette-panel,
  .palette-overlay.palette-exiting,
  .palette-overlay.palette-exiting .palette-panel,
  #update-banner,
  #viewport.expanding,
  #viewport.collapsing {
    animation: none;
  }

  .toast-exiting {
    opacity: 0;
  }

  .palette-search-loading {
    animation: none;
  }

  .palette-result,
  .toast-action-btn,
  .toast-dismiss,
  .update-banner-btn,
  .app-nav__link,
  .app-nav__brand,
  .grid-cell,
  .token-row,
  .token-swatch,
  .settings-radio,
  .settings-toggle {
    transition: none;
  }
}