:root {
  color-scheme: dark;
  --bg: #101216;
  --panel: #171a20;
  --panel-raised: #20242c;
  --ink: #eceff4;
  --muted: #9aa3af;
  --line: #323844;
  --control: #242934;
  --control-hover: #303746;
  --accent: #6bd0b1;
  --accent-ink: #071511;
  --code-bg: #0c0f14;
  --code-ink: #e8edf6;
  --focus: #7bd9c1;
  --link: #8bbcff;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 0%, rgba(107, 208, 177, 0.12), transparent 32rem),
    var(--bg);
  color: var(--ink);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow: hidden;
}

button,
select,
textarea {
  font: inherit;
}

.app {
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100%;
  overflow: hidden;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset;
}

.tool-group {
  display: inline-flex;
  gap: 4px;
  padding-right: 10px;
  border-right: 1px solid var(--line);
}

.icon-button,
.mode-button,
.block-select {
  height: 34px;
  border: 1px solid var(--line);
  background: var(--control);
  color: var(--ink);
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 36px;
  padding: 0;
  border-radius: 7px;
  cursor: pointer;
}

.button-icon {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.help-button {
  font-weight: 800;
}

.icon-button:hover,
.block-select:hover,
.mode-button:hover {
  background: var(--control-hover);
}

.icon-button:focus-visible,
.mode-button:focus-visible,
.block-select:focus-visible,
.visual-editor:focus-visible,
.code-editor:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.strike-icon {
  text-decoration: line-through;
  font-weight: 700;
}

.block-select {
  min-width: 112px;
  padding: 0 30px 0 10px;
  border-radius: 7px;
  cursor: pointer;
}

.file-actions {
  padding-right: 12px;
}

.spacer {
  flex: 1 1 auto;
  min-width: 12px;
}

.file-status {
  min-width: 120px;
  max-width: 280px;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.9rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mode-switch {
  display: inline-flex;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--control);
}

.mode-button {
  min-width: 76px;
  border: 0;
  border-radius: 0;
  cursor: pointer;
}

.mode-button + .mode-button {
  border-left: 1px solid var(--line);
}

.mode-button.is-active {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 650;
}

.editor-shell {
  min-height: 0;
  background: var(--panel);
  display: grid;
  grid-template-rows: 1fr;
}

.visual-editor,
.code-editor {
  width: 100%;
  height: 100%;
  border: 0;
}

.visual-editor {
  overflow: auto;
  padding: 26px clamp(18px, 4vw, 56px);
  background: var(--panel);
  caret-color: var(--accent);
}

.visual-editor:empty::before {
  content: "Start writing...";
  color: var(--muted);
}

.visual-editor h1,
.visual-editor h2,
.visual-editor h3,
.visual-editor h4,
.visual-editor h5,
.visual-editor h6 {
  line-height: 1.2;
  margin: 1em 0 0.45em;
}

.visual-editor h1 {
  font-size: 2rem;
}

.visual-editor h2 {
  font-size: 1.65rem;
}

.visual-editor h3 {
  font-size: 1.35rem;
}

.visual-editor p,
.visual-editor ul,
.visual-editor ol,
.visual-editor blockquote,
.visual-editor pre {
  margin: 0 0 1em;
}

.visual-editor blockquote {
  padding-left: 14px;
  border-left: 4px solid var(--accent);
  color: #c5d8d1;
}

.visual-editor pre {
  overflow: auto;
  padding: 14px;
  border-radius: 7px;
  background: var(--code-bg);
  color: var(--code-ink);
  border: 1px solid var(--line);
}

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

.visual-editor a {
  color: var(--link);
}

.visual-editor table {
  margin: 0 0 1em;
  border-collapse: collapse;
}

.visual-editor th,
.visual-editor td {
  padding: 6px 12px;
  border: 1px solid var(--line);
  text-align: left;
}

.visual-editor th {
  background: var(--panel-raised);
}

.visual-editor li:has(input[type="checkbox"]) {
  list-style: none !important;
  margin-left: -20px;
}

.visual-editor li input[type="checkbox"] {
  margin-right: 6px;
  vertical-align: middle;
  cursor: pointer;
  accent-color: var(--accent);
}

.code-editor {
  display: none;
  resize: none;
  padding: 22px clamp(16px, 4vw, 48px);
  background: var(--panel);
  color: var(--ink);
  line-height: 1.6;
  caret-color: var(--accent);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(5, 7, 10, 0.68);
  z-index: 20;
}

.modal-backdrop[hidden] {
  display: none;
}

.shortcut-modal {
  width: min(420px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-raised);
  box-shadow: var(--shadow);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 14px 10px 18px;
  border-bottom: 1px solid var(--line);
}

.modal-header h2 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.2;
}

.shortcut-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 14px 18px 18px;
}

.shortcut-list div {
  display: grid;
  grid-template-columns: 112px 1fr;
  align-items: center;
  gap: 18px;
}

.shortcut-list dt {
  min-height: 30px;
  display: inline-grid;
  place-items: center;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--code-bg);
  color: var(--code-ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
}

.shortcut-list dd {
  margin: 0;
  color: var(--muted);
}

.link-form {
  display: grid;
  gap: 10px;
  padding: 14px 18px 18px;
}

.link-form label {
  color: var(--muted);
  font-size: 0.9rem;
}

.link-form input {
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--control);
  color: var(--ink);
}

.link-form input:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.link-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 4px;
}

.link-actions .mode-button {
  min-width: 0;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
}

.app[data-mode="code"] .visual-editor {
  display: none;
}

.app[data-mode="code"] .code-editor {
  display: block;
}

@media (max-width: 1080px) {
  .toolbar {
    flex-wrap: wrap;
    row-gap: 8px;
  }

  .spacer {
    display: none;
  }

  .mode-switch {
    margin-left: auto;
  }
}