@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

:root {
  /* Light Theme Defaults */
  --color-background: #f7f5f0;
  --color-surface: #fdfbf7;
  --color-border: #ddd9d0;
  --color-border-subtle: #ece9e2;
  --color-text-primary: #1a1814;
  --color-text-muted: #6b6760;
  --color-text-faint: #aaa79f;
  --color-accent-primary: #2a5caa;
  --color-accent-soft: #e8eef8;
  --color-hover-surface: #f0ede6;
  --color-selected-surface: #e8eef8;
  --color-danger: #c0392b;
  --color-search-match: #fff8e1;
  --color-search-current: #fff0b0;
  --color-overlay: rgba(20, 18, 14, 0.45);
  --color-success: #2e7d32;
  --color-error: #d32f2f;
  --color-synced: #4caf50;

  /* Typography */
  --font-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --text-size-base: 1rem;
  /* 14px ideally, but based on user settings */
  --text-size-description: 0.875rem;
  --text-size-code: 0.875em;
  --text-size-root: 1rem;
  --text-size-level-2: 0.9rem;
  --text-size-level-3: 0.85rem;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;

  /* Radius */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);

  /* Motion */
  --transition-base: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-background: #1a1714;
    --color-surface: #242220;
    --color-border: #3a3733;
    --color-border-subtle: #2e2c2a;
    --color-text-primary: #ede9e3;
    --color-text-muted: #9b9790;
    --color-text-faint: #605d58;
    --color-accent-primary: #5c8ed6;
    --color-accent-soft: #1c2c46;
    --color-hover-surface: #2e2c28;
    --color-selected-surface: #1c2c46;
    --color-danger: #e05c4a;
    --color-search-match: #473a18;
    --color-search-current: #6a5318;
    --color-overlay: rgba(0, 0, 0, 0.7);
  }
}

/* Theme Overrides */
[data-theme="dark"] {
  --color-background: #1a1714;
  --color-surface: #242220;
  --color-border: #3a3733;
  --color-border-subtle: #2e2c2a;
  --color-text-primary: #ede9e3;
  --color-text-muted: #9b9790;
  --color-text-faint: #605d58;
  --color-accent-primary: #5c8ed6;
  --color-accent-soft: #1c2c46;
  --color-hover-surface: #2e2c28;
  --color-selected-surface: #1c2c46;
  --color-danger: #e05c4a;
  --color-search-match: #473a18;
  --color-search-current: #6a5318;
  --color-overlay: rgba(0, 0, 0, 0.7);
}

body {
  margin: 0;
  font-size: 15px;
  font-family: var(--font-base);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Splash Screen */
#splash {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--color-background);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.7s var(--transition-base);
}

#splash.hidden {
  opacity: 0;
  pointer-events: none;
}

.logo {
  font-size: 1.875rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.tagline {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  font-family: var(--font-base);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1.4;
  user-select: none;
  transition: background-color var(--transition-base),
    border-color var(--transition-base),
    color var(--transition-base),
    box-shadow var(--transition-base),
    opacity var(--transition-base),
    filter var(--transition-base);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-accent-primary);
  color: #fff;
  border-color: transparent;
}

.btn-primary:hover:not(:disabled) {
  filter: brightness(1.1);
}

.btn-primary:active:not(:disabled) {
  filter: brightness(0.92);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-hover-surface);
}

.btn-secondary:active:not(:disabled) {
  background-color: var(--color-border-subtle);
}

/* ── Inputs ── */
.input-field {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-base);
  font-size: 1rem;
  color: var(--color-text-primary);
  box-sizing: border-box;
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.input-field:focus {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent-primary) 15%, transparent);
}

/* ── Auth card ── */
.auth-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
  max-width: 400px;
  margin: 10vh auto;
}

/* ── Nodes ── */
.node-content {
  display: flex;
  align-items: flex-start;
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-2);
  transition: background-color var(--transition-base);
}

.node-selected {
  background-color: var(--color-selected, #b3d4ff) !important;
}

.node-content:not([style*="background-color"]):hover {
  background-color: var(--color-hover-surface);
}

.node-focused:not([style*="background-color"]) {
  background-color: var(--color-accent-soft);
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--color-overlay);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-dialog {
  background: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-md);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-subtle);
  padding-bottom: var(--space-3);
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background-color var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  color: var(--color-text-primary);
  background-color: var(--color-hover-surface);
}

/* ── Toolbar buttons ── */
.toolbar-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-family: var(--font-base);
  line-height: 1.4;
  transition: color var(--transition-base), background-color var(--transition-base);
}

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

/* ── Keyboard keycaps ── */
kbd {
  display: inline-block;
  padding: 1px 6px;
  font-family: var(--font-base);
  font-size: 0.8em;
  font-weight: 500;
  background: var(--color-hover-surface);
  border: 1px solid var(--color-border);
  border-bottom: 2px solid var(--color-border);
  border-radius: var(--radius-xs);
  color: var(--color-text-primary);
  white-space: nowrap;
  vertical-align: middle;
}

/* ── Shortcut list in HelpModal ── */
.shortcut-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.shortcut-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-subtle);
  font-size: 0.875rem;
  gap: var(--space-3);
}

.shortcut-row:last-child {
  border-bottom: none;
}

.shortcut-desc {
  color: var(--color-text-muted);
}

/* ── Tree guide lines ── */
.children {
  position: relative;
}

.children::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 4px;
  bottom: 4px;
  border-left: 1px solid var(--color-border-subtle);
  pointer-events: none;
}

/* ── Bullet refinement ── */
.bullet {
  flex-shrink: 0;
  font-size: 0.65rem;
  line-height: 1.5rem;
  min-width: 1.25em;
  text-align: center;
  transition: color var(--transition-base), transform var(--transition-base);
}

.bullet:hover {
  transform: scale(1.3);
}

/* ── Collapse toggle: hidden by default, revealed on node hover (desktop) ── */
.collapse-toggle {
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  margin: auto;
}

.node-content:hover .collapse-toggle {
  opacity: 1;
  pointer-events: auto;
}

/* Always visible on touch/mobile */
@media (pointer: coarse) {
  .collapse-toggle {
    opacity: 1;
    pointer-events: auto;
  }
}

/* ── Breadcrumbs ── */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
  margin-bottom: var(--space-3);
}

.breadcrumb-item {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color var(--transition-base), background-color var(--transition-base);
}

.breadcrumb-item:hover {
  color: var(--color-text-primary);
  background-color: var(--color-hover-surface);
}

.breadcrumb-item.active {
  color: var(--color-text-primary);
  font-weight: 500;
}

.breadcrumb-item:not(.active)::after {
  content: '›';
  color: var(--color-text-faint);
  margin-left: 4px;
  font-size: 0.8rem;
  user-select: none;
  pointer-events: none;
}

.breadcrumb-sep {
  display: none;
}

/* ── Status toolbar brand ── */
.status-brand {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  text-transform: uppercase;
}

/* ── Options section heading ── */
.options-section-heading {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  margin: 0 0 var(--space-2) 0;
}

/* ── Sync status dot ── */
.sync-dot {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-full);
  display: inline-block;
  flex-shrink: 0;
}

/* ── Links ── */
a {
  color: var(--color-accent-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ── Auth views ── */
.auth-title {
  margin-bottom: var(--space-4);
  text-align: center;
  font-size: 1.5rem;
  font-weight: 600;
}

.auth-subtitle {
  margin-bottom: var(--space-5);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.5;
}

.auth-mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.auth-mode-btn {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  font-family: var(--font-base);
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition-base);
}

.auth-mode-btn:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-text-primary);
}

.auth-mode-btn.is-active {
  background: var(--color-accent-primary);
  color: #fff;
  border-color: transparent;
}

.auth-remote-session-hint {
  margin-bottom: var(--space-4);
}

.auth-secondary-actions {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.lock-submit-btn {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--color-accent-primary);
  color: #fff;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--space-2) auto 0;
  cursor: pointer;
  transition: filter var(--transition-base), opacity var(--transition-base);
}

.lock-submit-btn:hover:not(:disabled) {
  filter: brightness(1.08);
}

.lock-submit-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.form-error {
  color: var(--color-danger);
  margin-bottom: var(--space-4);
  font-size: 0.875rem;
}

.form-success {
  color: var(--color-success);
  margin-bottom: var(--space-4);
  font-size: 0.875rem;
}

/* ── Input group label ── */
.input-group {
  margin-bottom: var(--space-4);
}

.input-label {
  display: block;
  margin-bottom: var(--space-1);
  font-weight: 500;
  font-size: 0.875rem;
}

/* ── Node layout ── */
.outliner>.node {
  margin: 0 var(--space-2);
}

.node {
  margin-left: var(--space-4);
}

.node-body {
  flex: 1;
  min-width: 0;
  line-height: 1.5rem;
}

/* ── Node text: read mode (markdown) ── */
.node-text-md {
  line-height: 1.5rem;
  font-family: inherit;
  font-size: inherit;
  cursor: text;
  color: var(--color-text-primary);
  white-space: pre-wrap;
}

/* ── Node text: edit mode (input) ── */
.node-text-input {
  width: 100%;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: inherit;
  outline: none;
  padding: 0;
  margin: 0;
  color: inherit;
  line-height: 1.5rem;
}

/* ── Node description: read mode (markdown) ── */
.node-desc-md {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  cursor: text;
  white-space: pre-wrap;
}

/* ── Node description: edit mode (textarea, auto-grow) ── */
.node-desc-textarea {
  width: 100%;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  padding: 0;
  margin: 0;
  color: var(--color-text-muted);
  resize: none;
  display: block;
  min-height: 1.4em;
  height: auto;
  overflow-y: hidden;
  box-sizing: border-box;
}

/* ── Modal title ── */
.modal-title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

/* ── Status toolbar ── */
.status-toolbar {
  border-top: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: var(--color-surface);
  flex-shrink: 0;
}

.toolbar-actions {
  display: flex;
  gap: var(--space-1);
}

.toolbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ── Options modal ── */
.options-section {
  margin-bottom: var(--space-5);
}

.options-theme-buttons {
  display: flex;
  gap: var(--space-2);
}

.repo-link {
  color: var(--color-accent-primary);
  text-decoration: none;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.repo-link:hover {
  text-decoration: underline;
}

.options-hint {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-2);
}

.options-auth-form {
  margin-top: var(--space-2);
}

.options-auth-signed {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.options-auth-actions {
  display: flex;
  gap: var(--space-2);
}

.sync-conflict-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  max-height: 32vh;
  overflow-y: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.sync-conflict-item {
  background: var(--color-hover-surface);
}

.sync-conflict-item+.sync-conflict-item {
  border-top: 1px solid var(--color-border);
}

.sync-conflict-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 0.3rem var(--space-2);
  border-top: 1px solid var(--color-border-subtle);
}

.sync-conflict-row:first-child {
  border-top: none;
}

.sync-conflict-value {
  font-size: 0.875rem;
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.sync-conflict-meta {
  color: var(--color-text-muted);
  font-size: 0.78rem;
  margin-bottom: var(--space-1);
}

.sync-conflict-choice {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}

.btn-xs {
  padding: 0.15rem 0.45rem;
  font-size: 0.75rem;
  line-height: 1.4;
}

/* ── Raw view ── */
.raw-view {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.raw-container {
  padding: var(--space-4);
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.raw-toolbar {
  margin-bottom: var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.raw-title {
  font-size: 1.2rem;
  margin: 0;
}

.raw-toolbar-actions {
  display: flex;
  gap: var(--space-2);
}

.raw-editor {
  flex: 1;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  resize: none;
  outline: none;
  line-height: 1.5;
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  box-sizing: border-box;
}

/* ── Main view ── */
.main-view {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  overflow-y: auto;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.main-toolbar {
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.quick-unlock-banner {
  margin: var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
}

.quick-unlock-content {
  min-width: 0;
}

.quick-unlock-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.quick-unlock-text {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.quick-unlock-actions {
  display: flex;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* ── Search bar ── */
.search-bar {
  display: flex;
  gap: var(--space-2);
}

.search-bar-inner {
  display: flex;
  flex: 1;
  gap: var(--space-2);
  align-items: center;
}

.search-input {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-base);
  font-size: 0.9rem;
  background: var(--color-surface);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.search-counter {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  padding: 0 var(--space-1);
}

/* ── Debug panel ── */
.debug-panel {
  margin-top: var(--space-4);
  padding: var(--space-4);
  border: 2px solid var(--color-danger);
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 0.8rem;
  background: var(--color-surface);
  color: var(--color-text-primary);
}

/* ── Zoom description area ── */
.zoom-description-area {
  margin-bottom: var(--space-3);
}

.zoom-desc-display {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  cursor: text;
  white-space: pre-wrap;
  padding: 2px 0;
  border-radius: var(--radius-sm);
}

.zoom-desc-placeholder {
  color: var(--color-text-faint);
  font-style: italic;
}

.zoom-desc-textarea {
  width: 100%;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  padding: 0;
  margin: 0;
  color: var(--color-text-muted);
  resize: none;
  display: block;
  min-height: 1.4em;
  height: auto;
  overflow-y: hidden;
  box-sizing: border-box;
}

/* ── Empty state placeholder ── */
.empty-state {
  padding: var(--space-3) var(--space-2);
  color: var(--color-text-faint);
  font-style: italic;
  cursor: text;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
  outline: none;
}

.empty-state:hover,
.empty-state:focus {
  background-color: var(--color-hover-surface);
  color: var(--color-text-muted);
}

@media (max-width: 640px) {
  .quick-unlock-banner {
    flex-direction: column;
    align-items: stretch;
  }

  .quick-unlock-actions {
    width: 100%;
  }

  .quick-unlock-actions .btn {
    flex: 1;
  }
}