:root {
  color-scheme: light;
  --paper: #fbfaf7;
  --paper-strong: #ffffff;
  --sidebar: #f1f0eb;
  --ink: #262722;
  --muted: #72736d;
  --line: #deddd6;
  --line-soft: #ebeae4;
  --brand: #6257c8;
  --brand-strong: #4d43aa;
  --brand-soft: #eeebff;
  --accent: #e69645;
  --danger: #b94d4d;
  --shadow: 0 12px 36px rgba(38, 39, 34, 0.08);
  --radius: 14px;
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body,
#app {
  width: 100%;
  min-width: 0;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background: var(--paper);
  color: var(--ink);
}

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

button {
  border: 0;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
[contenteditable]:focus-visible {
  outline: 2px solid rgba(98, 87, 200, 0.4);
  outline-offset: 2px;
}

.app-shell {
  display: grid;
  grid-template-columns: 272px 1fr;
  height: 100%;
}

.sidebar {
  display: flex;
  height: 100%;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  border-right: 1px solid var(--line);
  background: var(--sidebar);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 22px 20px 18px;
  flex-shrink: 0;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  overflow: hidden;
  place-items: center;
  background: transparent;
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-name {
  margin: 0;
  font-size: 20px;
  font-weight: 750;
  letter-spacing: -0.4px;
}

.brand-name span {
  color: var(--brand);
}

.brand-subtitle {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
}

.new-note-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin: 0 16px 16px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--ink);
  color: white;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease;
  flex-shrink: 0;
}

.new-note-button:hover {
  background: #151612;
  transform: translateY(-1px);
}

.secondary-new-button {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  color: var(--ink);
}

.secondary-new-button:hover {
  border-color: #c8c6be;
  background: white;
  color: var(--ink);
}

.sidebar-heading-row {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-right: 14px;
}

.sidebar-trash-link {
  padding: 4px 6px;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
}

.sidebar-trash-link:hover {
  background: rgba(255, 255, 255, 0.65);
  color: var(--brand-strong);
}

.sidebar-label {
  padding: 4px 20px 8px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.notebook-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 0 10px 16px;
}

.notebook-item {
  width: 100%;
  margin-bottom: 4px;
  padding: 11px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.notebook-item:hover {
  background: rgba(255, 255, 255, 0.62);
}

.notebook-item.active {
  border-color: var(--line);
  background: var(--paper-strong);
  box-shadow: 0 3px 10px rgba(38, 39, 34, 0.04);
}

.notebook-item-title {
  overflow: hidden;
  font-size: 14px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.notebook-item-meta {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
}

.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 12px 14px 16px;
  border-top: 1px solid var(--line);
  flex-shrink: 0;
}

.sidebar-data-menu {
  position: relative;
}

.sidebar-data-menu > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  list-style: none;
}

.sidebar-data-menu > summary::-webkit-details-marker,
.topbar-action-menu > summary::-webkit-details-marker {
  display: none;
}

.sidebar-data-menu > summary::after {
  margin-left: 7px;
  content: "⌃";
  color: var(--muted);
  font-size: 11px;
}

.sidebar-data-menu:not([open]) > summary::after {
  content: "⌄";
}

.sidebar-data-state {
  margin-left: auto;
  color: var(--muted);
  font-size: 10px;
}

.sidebar-data-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  padding-top: 7px;
}

.sidebar-data-grid .secondary-button {
  min-width: 0;
  padding: 7px 6px;
  font-size: 11px;
}

.sidebar-data-grid .wide-button {
  grid-column: 1 / -1;
}

.compact-install-button {
  padding: 7px 9px;
  font-size: 11px;
}

.sidebar-version {
  padding-top: 3px;
  color: var(--muted);
  font-size: 10px;
  text-align: center;
}

.library-quick-button {
  display: grid;
  width: 100%;
  gap: 2px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.62);
  text-align: left;
  cursor: pointer;
}

.library-quick-button span {
  color: var(--ink);
  font-size: 12px;
  font-weight: 650;
}

.library-quick-button small {
  overflow: hidden;
  color: var(--muted);
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.library-quick-button:hover,
.library-quick-button.reconnect:hover {
  border-color: rgba(98, 87, 200, 0.42);
  background: var(--brand-soft);
}

.library-quick-button.connected {
  border-color: rgba(99, 161, 109, 0.28);
}

.library-quick-button.reconnect span {
  color: var(--brand-strong);
}

.sidebar-empty {
  padding: 20px 10px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.secondary-button {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.55);
  cursor: pointer;
}

.secondary-button:hover {
  border-color: #c8c6be;
  background: white;
}

.secondary-button.active-button {
  border-color: rgba(98, 87, 200, 0.38);
  background: var(--brand-soft);
  color: var(--brand-strong);
}

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

.sidebar-footer .secondary-button {
  width: 100%;
}

.workspace {
  min-width: 0;
  height: 100%;
  overflow: auto;
  background:
    radial-gradient(circle at 100% 0, rgba(98, 87, 200, 0.05), transparent 28rem),
    var(--paper);
}

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 62px;
  height: auto;
  gap: 14px;
  padding: 10px 28px;
  border-bottom: 1px solid rgba(222, 221, 214, 0.8);
  background: rgba(251, 250, 247, 0.88);
  backdrop-filter: blur(14px);
}

.status-cluster {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 9px;
}

.connectivity-status {
  padding: 3px 7px;
  border-radius: 999px;
  background: #fff3df;
  color: #8c5a18;
  font-size: 10px;
  font-weight: 700;
}

.connectivity-status[hidden] {
  display: none;
}

.save-status {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
}

.save-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #63a16d;
}

.save-status[data-status="saving"] .save-dot {
  background: var(--accent);
}

.save-status[data-status="dirty"] {
  color: #8c5a18;
}

.save-status[data-status="dirty"] .save-dot {
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(230, 150, 69, 0.14);
}

.save-status[data-status="error"] {
  color: var(--danger);
  font-weight: 650;
}

.save-status[data-status="error"] .save-dot {
  background: var(--danger);
  box-shadow: 0 0 0 3px rgba(185, 77, 77, 0.12);
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  align-items: center;
}

.topbar-action-menu {
  position: relative;
}

.topbar-action-menu > summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  list-style: none;
}

.menu-chevron {
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform 140ms ease;
}

.topbar-action-menu[open] .menu-chevron {
  transform: translateY(2px) rotate(-135deg);
}

.topbar-action-menu[open] > summary,
.topbar-action-menu > summary:hover {
  border-color: #c8c6be;
  background: white;
}

.topbar-action-popover {
  position: absolute;
  z-index: 80;
  top: calc(100% + 7px);
  right: 0;
  display: grid;
  width: 154px;
  gap: 4px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper-strong);
  box-shadow: var(--shadow);
}

.topbar-action-popover button {
  padding: 8px 9px;
  border-radius: 7px;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.topbar-action-popover button:hover {
  background: var(--brand-soft);
}

.readonly-blocks,
.readonly-blocks + .add-block-row {
  pointer-events: none;
  opacity: 0.72;
}

.trashed-document {
  pointer-events: none;
  opacity: 0.76;
}

.modal-backdrop {
  position: fixed;
  z-index: 200;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(28, 29, 26, 0.34);
  backdrop-filter: blur(4px);
}

.history-dialog {
  display: flex;
  min-height: 0;
  flex-direction: column;
  width: min(620px, 100%);
  max-height: min(720px, calc(100vh - 48px));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper-strong);
  box-shadow: 0 24px 80px rgba(38, 39, 34, 0.22);
}

.midi-import-dialog {
  width: min(680px, 100%);
}

.library-dialog {
  width: min(660px, 100%);
}

.install-dialog {
  width: min(600px, 100%);
}

.install-help-body {
  display: grid;
  min-height: 0;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  padding: 24px;
  overflow: auto;
}

.install-help-body img {
  width: 112px;
}

.install-help-body h3 {
  margin: 0 0 10px;
}

.install-help-body ol {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.install-note {
  margin: 12px 0 0;
  color: var(--brand-strong);
  font-size: 12px;
  line-height: 1.6;
}

.install-button {
  border-color: rgba(98, 87, 200, 0.32);
  color: var(--brand-strong);
}

.library-import-body {
  display: grid;
  min-height: 0;
  gap: 16px;
  overflow: auto;
  padding: 22px 24px;
}

.library-file-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 13px 14px;
  border-radius: 10px;
  background: var(--sidebar);
}

.library-file-summary strong {
  width: 100%;
}

.library-file-summary span {
  color: var(--muted);
  font-size: 11px;
}

.library-choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.library-choice {
  display: grid;
  gap: 7px;
  min-height: 112px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--paper-strong);
  text-align: left;
  cursor: pointer;
}

.library-choice:hover {
  border-color: rgba(98, 87, 200, 0.48);
  background: var(--brand-soft);
}

.library-choice span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.library-choice.danger-choice {
  border-color: rgba(185, 77, 77, 0.35);
}

.midi-import-body {
  display: grid;
  min-height: 0;
  gap: 18px;
  overflow: auto;
  padding: 22px 24px;
}

.import-field {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
}

.import-field > span {
  color: var(--ink);
  font-weight: 650;
}

.import-field select,
.import-field input {
  min-width: 0;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-strong);
}

.import-field small {
  font-size: 11px;
}

.import-range {
  display: grid;
  align-items: end;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 12px;
}

.import-range > span {
  padding-bottom: 10px;
  color: var(--muted);
}

.import-summary,
.import-warning {
  padding: 11px 12px;
  border-radius: 8px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-size: 12px;
  line-height: 1.6;
}

.import-track-list {
  display: grid;
  max-height: 230px;
  gap: 7px;
  overflow: auto;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.import-track-list legend {
  padding: 0 5px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

.import-track-actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  padding: 0 2px 5px;
}

.import-track-actions button {
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper-strong);
  color: var(--brand-strong);
  font-size: 11px;
  cursor: pointer;
}

.import-track-option {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  padding: 7px 8px;
  border-radius: 7px;
  cursor: pointer;
}

.import-track-option:hover {
  background: var(--sidebar);
}

.import-track-option > span:last-child {
  display: grid;
  min-width: 0;
}

.import-track-option small {
  color: var(--muted);
  font-size: 11px;
}

.import-warning {
  background: #fff3df;
  color: #8c5a18;
}

.dialog-actions {
  display: flex;
  flex-shrink: 0;
  justify-content: flex-end;
  gap: 8px;
  padding: 14px 24px 20px;
  border-top: 1px solid var(--line-soft);
}

.track-select {
  max-width: 150px;
  border-color: rgba(98, 87, 200, 0.4);
  background: var(--brand-soft);
  color: var(--brand-strong);
}

.midi-block {
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

.midi-block.midi-file-dragover {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(98, 87, 200, 0.14), var(--shadow);
}

.midi-block.midi-file-dragover::after {
  position: absolute;
  z-index: 12;
  inset: 10px;
  display: grid;
  place-items: center;
  border: 2px dashed var(--brand);
  border-radius: 10px;
  background: rgba(238, 235, 255, 0.92);
  color: var(--brand-strong);
  content: "松开以导入 MIDI 文件";
  font-size: 16px;
  font-weight: 700;
  pointer-events: none;
}

.dialog-header {
  display: flex;
  flex-shrink: 0;
  align-items: flex-start;
  justify-content: space-between;
  padding: 22px 24px 16px;
  border-bottom: 1px solid var(--line-soft);
}

.dialog-header h2 {
  margin: 0 0 5px;
  font-size: 20px;
}

.dialog-header p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.history-list {
  max-height: 310px;
  overflow: auto;
  padding: 0;
}

.backup-center-body {
  display: grid;
  max-height: calc(100vh - 160px);
  gap: 16px;
  overflow: auto;
  padding: 18px 20px 20px;
}

.backup-summary {
  flex-shrink: 0;
}

.backup-action-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.history-section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-top: 2px;
}

.history-section-title span {
  color: var(--muted);
  font-size: 11px;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 8px;
  border-bottom: 1px solid var(--line-soft);
}

.history-item strong,
.history-item span {
  display: block;
}

.history-item span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

.dialog-empty {
  padding: 48px 20px;
  color: var(--muted);
  text-align: center;
}

.workspace-layout {
  display: grid;
  width: min(1220px, calc(100% - 40px));
  margin: 0 auto;
  grid-template-columns: minmax(0, 980px);
  justify-content: center;
}

.workspace-layout.with-outline {
  grid-template-columns: minmax(0, 1fr) 204px;
  gap: 22px;
  justify-content: stretch;
}

.document {
  width: 100%;
  margin: 48px auto 0;
  padding-bottom: 60vh;
}

.document-title {
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  font-size: 38px;
  font-weight: 760;
  letter-spacing: -1.3px;
}

.document-title::placeholder {
  color: #aaa9a2;
}

.document-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 14px 0 30px;
  color: var(--muted);
  font-size: 12px;
}

.notebook-settings {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.compact-field {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-strong);
}

.compact-field span {
  color: var(--muted);
  font-size: 11px;
}

.compact-field input,
.compact-field select {
  width: 54px;
  padding: 0;
  border: 0;
  background: transparent;
  font-size: 12px;
}

.compact-field select {
  width: 62px;
}

.block {
  position: relative;
  margin: 0 0 16px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: border-color 120ms ease, box-shadow 120ms ease;
  scroll-margin-top: 78px;
}

.block:hover,
.block:focus-within {
  border-color: var(--line);
  box-shadow: 0 5px 18px rgba(38, 39, 34, 0.035);
}

.block-tools {
  position: absolute;
  z-index: 5;
  top: 8px;
  right: 8px;
  display: flex;
  gap: 3px;
  opacity: 0;
  transition: opacity 120ms ease;
}

.block:hover .block-tools,
.block:focus-within .block-tools {
  opacity: 1;
}

.icon-button {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--muted);
  cursor: pointer;
}

.icon-button:hover {
  color: var(--ink);
}

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

.text-block {
  padding: 20px 46px 20px 22px;
  background: rgba(255, 255, 255, 0.34);
  line-height: 1.72;
}

.text-editor {
  min-height: 60px;
}

.rich-toolbar {
  display: flex;
  gap: 4px;
  margin: -8px 0 8px;
  opacity: 0;
  transition: opacity 120ms ease;
}

.rich-toolbar select {
  height: 26px;
  padding: 0 25px 0 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--muted);
  font-size: 11px;
}

.toolbar-divider {
  width: 1px;
  height: 20px;
  margin: 3px 2px;
  background: var(--line);
}

.text-block:hover .rich-toolbar,
.text-block:focus-within .rich-toolbar {
  opacity: 1;
}

.rich-toolbar button {
  min-width: 28px;
  height: 26px;
  padding: 0 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
}

.text-editor blockquote {
  margin: 1em 0;
  padding: 2px 0 2px 16px;
  border-left: 3px solid var(--brand);
  color: #5e5f59;
}

.text-editor a {
  color: var(--brand);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.text-editor h1,
.text-editor h2,
.text-editor h3 {
  margin: 0.5em 0 0.35em;
  line-height: 1.25;
}

.text-editor h2 {
  font-size: 23px;
}

.text-editor p {
  margin: 0.5em 0;
}

.text-editor:empty::before {
  color: #aaa9a2;
  content: "输入文字，或在下方添加一个 MIDI 块……";
}

.midi-block {
  overflow: hidden;
  border-color: var(--line);
  background: var(--paper-strong);
  box-shadow: var(--shadow);
}

.midi-header {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  padding: 11px 142px 11px 14px;
  border-bottom: 1px solid var(--line);
}

.play-button {
  display: grid;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  background: var(--brand);
  color: white;
  cursor: pointer;
}

.play-button:hover {
  background: var(--brand-strong);
}

.play-button.playing {
  background: var(--accent);
}

.midi-title {
  min-width: 130px;
  max-width: 210px;
  padding: 5px 7px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  font-weight: 700;
}

.midi-title:hover,
.midi-title:focus {
  background: var(--sidebar);
}

.midi-controls {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-left: auto;
}

.midi-track-panel {
  margin: 0;
  border-bottom: 1px solid var(--line);
  background: #faf9f6;
}

.track-panel-summary {
  display: flex;
  min-height: 42px;
  align-items: center;
  gap: 12px;
  padding: 7px 14px;
}

.track-panel-toggle {
  flex: 0 0 auto;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper-strong);
  color: var(--brand-strong);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.active-track-summary {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 7px;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-panel-list {
  display: grid;
  max-height: 286px;
  gap: 6px;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 4px 14px 10px;
  scrollbar-gutter: stable;
}

.track-row {
  display: grid;
  grid-template-columns: 22px minmax(110px, 1fr) 104px minmax(120px, 1.2fr) 56px 38px;
  align-items: center;
  gap: 7px;
  min-height: 42px;
  padding: 5px 7px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid transparent;
  border-radius: 9px;
  background: var(--paper-strong);
}

.track-row.active {
  border-color: color-mix(in srgb, var(--track-color) 44%, var(--line));
  border-left-color: var(--track-color);
  box-shadow: 0 2px 10px color-mix(in srgb, var(--track-color) 10%, transparent);
}

.track-enabled-checkbox {
  width: 16px;
  height: 16px;
  accent-color: var(--track-color);
  cursor: pointer;
}

.track-activate-button {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 7px;
  padding: 5px 4px;
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.track-activate-button strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-activate-button em {
  flex: 0 0 auto;
  padding: 2px 5px;
  border-radius: 5px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-size: 9px;
  font-style: normal;
}

.track-instrument-select,
.track-row-memo,
.new-track-instrument {
  min-width: 0;
  height: 30px;
  padding: 0 7px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  font-size: 11px;
}

.track-row-memo {
  width: 100%;
  background: var(--paper-strong);
}

.track-note-count {
  color: var(--muted);
  font-size: 10px;
  text-align: right;
  white-space: nowrap;
}

.track-panel-footer {
  display: flex;
  justify-content: flex-end;
  gap: 7px;
  padding: 8px 14px 10px;
  border-top: 1px solid var(--line-soft);
}

.new-track-instrument {
  width: 124px;
}

.track-add-button {
  padding: 0 10px;
  border: 1px dashed color-mix(in srgb, var(--brand) 60%, var(--line));
  border-radius: 7px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-size: 11px;
  cursor: pointer;
}

.track-delete-button {
  padding: 5px 4px;
  border-radius: 6px;
  background: transparent;
  color: var(--danger);
  font-size: 10px;
  cursor: pointer;
}

.track-color-dot {
  display: inline-block;
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--track-color, var(--brand));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--track-color, var(--brand)) 18%, transparent);
}

.with-outline .midi-header {
  flex-wrap: wrap;
}

.with-outline .midi-controls {
  width: calc(100% - 46px);
  margin-left: 46px;
  justify-content: flex-start;
}

.mini-select,
.mini-input {
  height: 30px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  font-size: 12px;
}

.mini-input {
  width: 60px;
}

.toggle-button {
  height: 30px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
}

.toggle-button.active {
  border-color: rgba(98, 87, 200, 0.45);
  background: var(--brand-soft);
  color: var(--brand-strong);
}

.piano-roll-shell {
  position: relative;
  height: 390px;
  overflow: auto;
  background: #faf9f6;
  overscroll-behavior: contain;
}

.playhead-ruler {
  position: sticky;
  z-index: 4;
  top: 0;
  left: 0;
  width: 100%;
  height: 24px;
  margin-bottom: -24px;
  overflow: hidden;
  border-bottom: 1px solid #d5d2c9;
  background: rgba(247, 245, 239, 0.96);
  cursor: col-resize;
  backdrop-filter: blur(4px);
}

.playhead-ruler-grid {
  position: absolute;
  inset: 0 auto 0 0;
  pointer-events: none;
  will-change: transform;
}

.playhead-ruler-grid i {
  position: absolute;
  bottom: 0;
  width: 1px;
  height: 7px;
  background: #d8d5cc;
}

.playhead-ruler-grid i.beat {
  height: 12px;
  background: #aaa79f;
}

.playhead-ruler-grid i.bar {
  height: 18px;
  background: #77756e;
}

.playhead-ruler-grid .bar-number {
  position: absolute;
  top: 3px;
  color: #686760;
  font-size: 9px;
  font-weight: 650;
  pointer-events: none;
}

.playhead-ruler-label {
  position: absolute;
  left: 8px;
  top: 5px;
  color: var(--muted);
  font-size: 10px;
  pointer-events: none;
}

.playhead-ruler-marker {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
  pointer-events: none;
}

.playhead-ruler-marker::after {
  position: absolute;
  top: 0;
  left: -4px;
  width: 0;
  height: 0;
  border-top: 6px solid var(--accent);
  border-right: 5px solid transparent;
  border-left: 5px solid transparent;
  content: "";
}

.playhead-position-label {
  position: absolute;
  top: 3px;
  left: 7px;
  padding: 1px 4px;
  border-radius: 4px;
  background: rgba(224, 95, 86, 0.9);
  color: white;
  font-size: 9px;
  line-height: 14px;
  white-space: nowrap;
}

.piano-roll-shell canvas {
  position: sticky;
  z-index: 1;
  top: 0;
  left: 0;
  display: block;
  cursor: default;
  touch-action: none;
}

.piano-roll-spacer {
  position: absolute;
  z-index: 0;
  top: 0;
  left: 0;
  pointer-events: none;
}

.midi-navigator {
  display: grid;
  min-width: 0;
  height: 62px;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: stretch;
  border-top: 1px solid var(--line);
  background: #f4f2ec;
}

.midi-navigator canvas {
  display: block;
  width: 100%;
  min-width: 0;
  height: 61px;
  cursor: crosshair;
  touch-action: none;
}

.navigator-button {
  padding: 0 13px;
  border-left: 1px solid var(--line);
  background: rgba(255,255,255,.58);
  color: var(--brand-strong);
  font-size: 11px;
  cursor: pointer;
}

.navigator-button:hover {
  background: var(--brand-soft);
}

.preferences-dialog {
  width: min(640px, 100%);
}

.preferences-body {
  display: grid;
  min-height: 0;
  gap: 18px;
  overflow: auto;
  padding: 22px 24px;
}

.settings-section {
  display: grid;
  gap: 12px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
}

.settings-section:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.settings-section h3 {
  margin: 0;
  font-size: 14px;
}

.settings-note {
  margin: -3px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
}

.browser-capability-notice {
  display: grid;
  gap: 5px;
  padding: 13px 14px;
  border: 1px solid rgba(98, 87, 200, 0.2);
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--ink);
  line-height: 1.55;
}

.browser-capability-notice strong {
  font-size: 13px;
}

.browser-capability-notice span,
.browser-capability-notice small {
  color: var(--muted);
  font-size: 11px;
}

.browser-capability-notice code,
.install-note code {
  font-family: inherit;
  font-weight: 700;
}

.settings-data-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.settings-data-grid .wide-button {
  grid-column: 1 / -1;
}

.preference-toggle {
  grid-template-columns: auto minmax(0, 1fr);
}

.library-setting-actions {
  justify-content: flex-start;
  flex-wrap: wrap;
  padding: 0;
  border-top: 0;
}

.piano-roll-hint {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  gap: 14px;
}

.midi-hint-actions,
.transpose-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.transpose-controls {
  padding: 2px 5px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
}

.transpose-controls button {
  padding: 1px 4px;
  border-radius: 4px;
  background: transparent;
  color: var(--brand-strong);
  cursor: pointer;
}

.midi-tool-button {
  padding: 3px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--brand-strong);
  font-size: 11px;
  cursor: pointer;
}

.midi-tool-button:hover {
  border-color: rgba(98, 87, 200, 0.45);
  background: var(--brand-soft);
}

.transpose-controls button:hover {
  background: var(--brand-soft);
}

.image-block {
  min-height: 180px;
  padding: 20px 46px 18px 20px;
  border-color: var(--line-soft);
  background: rgba(255, 255, 255, 0.5);
}

.image-dropzone {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 150px;
  align-items: center;
  justify-content: center;
  border: 1px dashed #c9c7bf;
  border-radius: 10px;
  color: var(--muted);
  cursor: pointer;
}

.image-dropzone:hover,
.image-dropzone:focus {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand-strong);
}

.paste-illustration {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 10px;
  background: white;
  color: var(--brand);
  font-size: 22px;
}

.dropzone-actions {
  display: flex;
  gap: 7px;
}

.primary-small-button {
  padding: 8px 11px;
  border-radius: 8px;
  background: var(--brand);
  color: white;
  cursor: pointer;
}

.primary-small-button:hover {
  background: var(--brand-strong);
}

.image-preview {
  display: block;
  max-width: 100%;
  max-height: 580px;
  margin: 0 auto;
  border-radius: 8px;
}

.image-caption {
  width: 100%;
  margin-top: 10px;
  padding: 7px 8px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  text-align: center;
}

.image-options {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 11px;
}

.image-options label {
  display: flex;
  align-items: center;
  gap: 7px;
}

.image-options input[type="range"] {
  width: 110px;
  accent-color: var(--brand);
}

.link-button {
  padding: 0;
  background: transparent;
  color: var(--brand);
  cursor: pointer;
}

.mini-labelled {
  display: flex;
  align-items: center;
  height: 30px;
  padding-left: 7px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  color: var(--muted);
  font-size: 10px;
}

.mini-labelled .mini-input {
  width: 42px;
  border: 0;
  background: transparent;
}

.add-block-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 22px 0;
}

.add-block-button {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.add-block-button:hover {
  border-color: #bbb9b0;
  background: white;
  color: var(--ink);
}

.collapsed-block {
  height: 54px;
  min-height: 54px;
}

.collapsed-block > :not(.block-tools):not(.collapsed-label) {
  display: none;
}

.collapsed-label {
  display: flex;
  height: 52px;
  align-items: center;
  padding: 0 18px;
  color: var(--muted);
  font-size: 13px;
}

.empty-state {
  display: grid;
  height: 100%;
  place-items: center;
  color: var(--muted);
}

.outline-pane {
  position: sticky;
  top: 86px;
  align-self: start;
  max-height: calc(100vh - 112px);
  margin-top: 48px;
  overflow: auto;
  padding: 14px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.64);
  box-shadow: 0 6px 20px rgba(38, 39, 34, 0.035);
  backdrop-filter: blur(10px);
}

.outline-heading {
  padding: 2px 7px 7px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.outline-title {
  overflow: hidden;
  padding: 3px 7px 10px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.outline-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: 8px;
}

.outline-item {
  display: grid;
  width: 100%;
  min-width: 0;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 5px;
  padding: 6px 7px;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  text-align: left;
  cursor: pointer;
}

.outline-item span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.outline-item:hover {
  background: var(--brand-soft);
  color: var(--brand-strong);
}

.outline-item.depth-2 {
  padding-left: 12px;
}

.outline-item.depth-3 {
  padding-left: 20px;
  font-size: 11px;
}

#toast-region {
  position: fixed;
  z-index: 400;
  right: 24px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

#pwa-banner-region {
  position: fixed;
  z-index: 150;
  right: 24px;
  bottom: 24px;
}

.pwa-update-banner {
  display: grid;
  width: min(430px, calc(100vw - 48px));
  grid-template-columns: 42px minmax(0, 1fr) auto auto;
  gap: 10px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--paper-strong);
  box-shadow: 0 18px 48px rgba(38, 39, 34, 0.2);
}

.pwa-update-banner img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

.pwa-update-banner strong,
.pwa-update-banner span {
  display: block;
}

.pwa-update-banner span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

.toast {
  width: min(620px, calc(100vw - 48px));
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--ink);
  box-shadow: var(--shadow);
  color: white;
  font-size: 13px;
  line-height: 1.5;
  overflow-wrap: anywhere;
  animation: toast-in 180ms ease-out;
}

.preference-error {
  padding: 11px 13px;
  border-radius: 9px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.release-summary span:last-child {
  width: 100%;
  line-height: 1.5;
}

@keyframes toast-in {
  from {
    transform: translateY(6px);
    opacity: 0;
  }
}

@media (max-width: 1120px) {
  .app-shell {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .workspace-layout,
  .workspace-layout.with-outline {
    width: calc(100% - 28px);
    grid-template-columns: minmax(0, 1fr);
  }

  .outline-pane {
    display: none;
  }

  .topbar [data-action="toggle-nav"] {
    display: none;
  }

  .document {
    width: 100%;
    margin-top: 34px;
  }

  .midi-header,
  .with-outline .midi-header {
    flex-wrap: wrap;
    padding-right: 118px;
  }

  .midi-controls,
  .with-outline .midi-controls {
    width: calc(100% - 46px);
    margin-left: 46px;
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .track-panel-summary {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .track-row {
    grid-template-columns: 22px minmax(120px, 1fr) 108px 38px;
  }

  .track-row-memo {
    grid-column: 2 / 4;
  }

  .track-note-count {
    grid-column: 2;
    text-align: left;
  }

  .track-delete-button {
    grid-column: 4;
    grid-row: 1;
  }

  .midi-controls {
    gap: 4px;
  }

  .toggle-button {
    white-space: nowrap;
  }

  .piano-roll-hint {
    flex-wrap: wrap;
  }
}

@media (max-width: 820px) {
  .settings-data-grid {
    grid-template-columns: 1fr;
  }

  .settings-data-grid .wide-button {
    grid-column: auto;
  }

  .backup-action-grid {
    grid-template-columns: 1fr;
  }

  .app-shell {
    grid-template-columns: 176px minmax(0, 1fr);
  }

  .brand {
    padding-right: 14px;
    padding-left: 14px;
  }

  .brand-subtitle,
  .notebook-item-meta {
    display: none;
  }

  .install-help-body {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 14px;
  }

  .install-help-body img {
    width: 72px;
    border-radius: 17px;
  }

  .new-note-button {
    margin-right: 10px;
    margin-left: 10px;
  }

  .topbar {
    padding: 0 14px;
  }

  .save-status {
    max-width: 48%;
  }

  .save-status span:last-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .document-title {
    font-size: 31px;
  }

  .document-meta {
    flex-wrap: wrap;
    gap: 8px 14px;
  }

  .notebook-settings {
    width: 100%;
    margin-left: 0;
  }

  .midi-header,
  .with-outline .midi-header {
    padding-right: 104px;
  }

  .midi-title {
    min-width: 100px;
    max-width: 150px;
  }

  .midi-controls,
  .with-outline .midi-controls {
    width: 100%;
    margin-left: 0;
  }

  .rich-toolbar {
    flex-wrap: wrap;
  }
}