:root {
  color-scheme: light;
  --bg: #f3f5f7;
  --bg-strong: #e7edf1;
  --surface: #fbfcfd;
  --surface-strong: #ffffff;
  --surface-muted: #eef2f6;
  --border: #d8dde4;
  --border-strong: #c7cfd8;
  --text: #15202b;
  --text-muted: #5f6b78;
  --accent: #365fc0;
  --accent-soft: #dde6ff;
  --success: #2d8458;
  --success-soft: #dff0e6;
  --danger: #b74848;
  --danger-soft: #f5e0e0;
  --warning: #8e6428;
  --warning-soft: #f5ead7;
  --shadow: 0 14px 30px rgba(18, 28, 45, 0.08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
}

body {
  line-height: 1.45;
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
input,
textarea,
select {
  border: 1px solid var(--border);
  border-radius: 6px;
}

button {
  background: var(--surface-strong);
  color: var(--text);
  cursor: pointer;
}

input,
textarea,
select {
  background: var(--surface-strong);
  color: var(--text);
}

textarea {
  resize: none;
}

.is-hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.boot-screen,
.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 20px;
}

.boot-screen {
  gap: 14px;
  background: linear-gradient(180deg, #f7f9fb 0%, #edf2f5 100%);
  text-align: center;
}

.boot-wordmark,
.auth-wordmark,
.brand-wordmark {
  display: block;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

.boot-wordmark,
.auth-wordmark {
  height: 44px;
}

.boot-copy {
  margin: 0;
  color: var(--text-muted);
}

.auth-panel {
  width: min(100%, 430px);
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-strong);
  box-shadow: var(--shadow);
}

.auth-panel h1 {
  margin: 8px 0 0;
  font-size: 1.5rem;
}

.eyebrow,
.pane-meta {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.auth-mode-switch {
  display: flex;
  gap: 8px;
  margin-top: 20px;
}

.mode-button,
.ghost-button,
.toolbar-button,
.tag-toggle,
.nav-main,
.tab-main,
.tag-main {
  transition: border-color 120ms ease, background-color 120ms ease, color 120ms ease;
}

.mode-button {
  flex: 1;
  padding: 10px 12px;
  background: var(--surface-muted);
}

.mode-button.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 18px;
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.auth-field input {
  width: 100%;
  padding: 11px 12px;
}

.auth-error {
  margin: 0;
  padding: 10px 12px;
  border: 1px solid #efc2c2;
  border-radius: 6px;
  background: var(--danger-soft);
  color: var(--danger);
}

.primary-button {
  padding: 10px 14px;
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.primary-button:disabled,
.ghost-button:disabled,
.toolbar-button:disabled,
.mode-button:disabled {
  cursor: default;
  opacity: 0.55;
}

.auth-submit {
  width: 100%;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.topbar {
  display: grid;
  grid-template-columns: auto minmax(240px, 1fr) auto;
  align-items: center;
  gap: 20px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-strong);
}

.brand-wordmark {
  height: 38px;
  max-width: min(100%, 240px);
}

.search input {
  width: 100%;
  min-width: 0;
  padding: 10px 14px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  min-width: 0;
}

.account-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 4px 4px 4px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-muted);
  min-width: 0;
}

.account-pill span {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ghost-button {
  padding: 8px 10px;
  background: var(--surface-muted);
}

.ghost-button-danger {
  color: var(--danger);
}

.workspace {
  min-height: 0;
  display: grid;
  grid-template-columns: 260px 320px minmax(360px, 1fr) minmax(340px, 1fr);
}

.pane {
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--surface);
}

.pane + .pane {
  border-left: 1px solid var(--border);
}

.library-pane {
  background: #f7f9fb;
}

.pane-section,
.pane-header,
.editor-toolbar,
.editor-meta,
.tabs,
.statusbar {
  padding-left: 16px;
  padding-right: 16px;
}

.pane-section {
  padding-top: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.pane-section h2,
.section-heading h2,
.pane-header h1,
.pane-header h2,
.editor-meta h2,
.empty-panel h2 {
  margin: 0;
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.pane-header h1,
.pane-header h2,
.editor-meta h2 {
  font-size: 1rem;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 10px;
}

.section-heading h2,
.pane-section > h2 {
  font-size: 0.84rem;
  color: var(--text-muted);
  font-weight: 600;
}

.nav-list,
.tag-list,
.notes-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-row,
.tag-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.nav-main,
.tag-main {
  width: 100%;
  min-width: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  text-align: left;
  background: transparent;
}

.nav-main.is-active,
.tag-main.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.nav-main-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-main-count {
  color: var(--text-muted);
}

.nav-actions,
.tag-actions {
  display: flex;
  gap: 6px;
}

.tag-main {
  justify-content: flex-start;
  font-weight: 600;
}

.notes-pane,
.preview-pane {
  overflow: hidden;
}

.notes-list,
.preview {
  padding: 16px;
  overflow: auto;
}

.notes-group-label {
  margin: 10px 0 2px;
  color: var(--text-muted);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
}

.note-row {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  padding: 12px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  text-align: left;
}

.note-row.is-active {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.note-row-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.note-row-title {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.95rem;
  font-weight: 600;
}

.note-row-snippet {
  color: var(--text-muted);
  font-size: 0.88rem;
  overflow-wrap: anywhere;
}

.note-row-pills,
.tag-editor {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 8px;
  background: var(--surface-muted);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.tabs {
  display: flex;
  gap: 8px;
  padding-top: 14px;
  padding-bottom: 14px;
  overflow: auto;
  border-bottom: 1px solid var(--border);
}

.mobile-pane-toggle {
  display: none;
  gap: 8px;
  padding: 12px 16px 0;
}

.pane-toggle-button {
  flex: 1;
  padding: 9px 12px;
  background: var(--surface-muted);
}

.pane-toggle-button.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.tab {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-muted);
}

.tab.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.tab-main,
.tab-close {
  border: 0;
  background: transparent;
}

.tab-main {
  min-width: 0;
  padding: 9px 10px;
  text-align: left;
}

.tab-main span {
  display: block;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tab-close {
  padding: 9px 10px;
  color: var(--text-muted);
}

.editor-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.toolbar-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.toolbar-selects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  width: min(100%, 420px);
}

.toolbar-button {
  padding: 8px 11px;
  background: var(--surface-muted);
}

.toolbar-button.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.toolbar-button-danger {
  color: var(--danger);
}

.toolbar-selects select {
  min-width: 0;
  padding: 8px 10px;
  width: 100%;
}

.editor-content {
  min-height: 0;
  display: flex;
  flex: 1;
  flex-direction: column;
}

.editor-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.editor-input {
  flex: 1;
  min-height: 340px;
  border: 0;
  border-radius: 0;
  background: var(--surface-strong);
  overflow: hidden;
}

.tag-toggle {
  padding: 7px 10px;
  background: var(--surface-strong);
}

.tag-toggle.is-active {
  border-color: var(--accent);
}

.preview {
  color: var(--text);
  overflow-wrap: anywhere;
}

.preview > :first-child {
  margin-top: 0;
}

.preview pre,
.preview code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.preview pre {
  overflow: auto;
  padding: 12px;
  border-radius: 6px;
  background: #0f1721;
  color: #f8fbff;
}

.preview blockquote {
  margin-left: 0;
  padding-left: 12px;
  border-left: 3px solid var(--border-strong);
  color: var(--text-muted);
}

.editor-input .cm-editor {
  height: 100%;
  background: var(--surface-strong);
  color: var(--text);
}

.editor-input .cm-focused {
  outline: none;
}

.editor-input .cm-scroller {
  overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.editor-input .cm-gutters {
  border-right: 1px solid var(--border);
  background: var(--surface-muted);
  color: var(--text-muted);
}

.editor-input .cm-lineNumbers .cm-gutterElement {
  padding-top: 16px;
}

.editor-input .cm-content,
.editor-input .cm-gutter {
  min-height: 340px;
  padding-top: 16px;
  padding-bottom: 28px;
}

.editor-input .cm-content {
  padding-left: 16px;
  padding-right: 16px;
}

.editor-input .cm-activeLine,
.editor-input .cm-activeLineGutter {
  background: rgba(54, 95, 192, 0.08);
}

.editor-input .cm-selectionBackground,
.editor-input .cm-content ::selection {
  background: rgba(54, 95, 192, 0.18);
}

.editor-input .cm-placeholder {
  color: var(--text-muted);
}

.empty-panel {
  margin: 16px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-strong);
}

.empty-panel p:last-child {
  margin-bottom: 0;
}

.empty-copy {
  color: var(--text-muted);
}

.statusbar {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding-top: 12px;
  padding-bottom: 12px;
  border-top: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text-muted);
  font-size: 0.84rem;
}

.auth-panel h1,
.eyebrow,
.pane-meta,
.empty-panel h2,
.empty-copy,
.statusbar,
.auth-error {
  overflow-wrap: anywhere;
}

.topbar > *,
.pane-header > *,
.section-heading > *,
.note-row-header > *,
.editor-meta > *,
.statusbar > * {
  min-width: 0;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  color: var(--text-muted);
}

.status-pill-saving {
  border-color: #e7d4b0;
  background: var(--warning-soft);
  color: var(--warning);
}

.status-pill-saved {
  border-color: #cfe7d7;
  background: var(--success-soft);
  color: var(--success);
}

.status-pill-error,
.status-pill-conflict {
  border-color: #efc2c2;
  background: var(--danger-soft);
  color: var(--danger);
}

@media (max-width: 1260px) {
  .workspace {
    grid-template-columns: 250px 300px minmax(320px, 1fr);
  }

  .preview-pane {
    grid-column: 2 / -1;
    border-top: 1px solid var(--border);
  }
}

@media (max-width: 980px) {
  .topbar {
    grid-template-columns: 1fr;
  }

  .topbar-actions {
    justify-content: space-between;
  }

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

  .mobile-pane-toggle {
    display: flex;
  }

  .pane.is-mobile-hidden {
    display: none;
  }

  .pane + .pane {
    border-left: 0;
    border-top: 1px solid var(--border);
  }

  .editor-toolbar,
  .editor-meta,
  .statusbar {
    flex-direction: column;
    align-items: stretch;
  }

  .statusbar {
    gap: 10px;
  }
}

@media (max-width: 640px) {
  .auth-panel {
    padding: 22px;
  }

  .topbar,
  .pane-header,
  .pane-section,
  .mobile-pane-toggle,
  .editor-toolbar,
  .editor-meta,
  .tabs,
  .statusbar,
  .notes-list,
  .preview {
    padding-left: 12px;
    padding-right: 12px;
  }

  .account-pill {
    width: 100%;
    justify-content: space-between;
  }

  .toolbar-selects {
    width: 100%;
  }

  .nav-row,
  .tag-row {
    grid-template-columns: 1fr;
  }

  .nav-actions,
  .tag-actions {
    justify-content: flex-end;
  }

  .note-row-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .editor-input .cm-content {
    padding-left: 12px;
    padding-right: 12px;
  }
}