:root {
  color-scheme: dark;
  --bg: var(--color-bg-primary);
  --surface: var(--color-bg-secondary);
  --surface-muted: var(--color-bg-tertiary);
  --surface-hover: var(--color-bg-tertiary);
  --text: var(--color-text-primary);
  --muted: var(--color-text-secondary);
  --border: var(--color-border);
  --border-strong: var(--color-text-primary);
  --accent: var(--color-accent-blue);
  --accent-contrast: #fff;
  --danger: var(--color-error);
  --shadow: rgb(0 0 0 / 45%);
  --pulse: rgb(10 132 255 / 24%);
  --code-bg: #0d0f12;
  --code-text: var(--color-text-primary);
  --tok-comment: #8b949e;
  --tok-string: #a5d6ff;
  --tok-number: #f0b072;
  --tok-keyword: #ff7b72;
  --tok-literal: #79c0ff;
  --tok-func: #d2a8ff;
  --tok-tag: #7ee787;
  --tok-attr: #79c0ff;
  --tok-var: #ffa657;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
}

:root[data-theme="light"] {
  color-scheme: light;
  --shadow: rgb(32 33 36 / 8%);
  --pulse: rgb(32 33 36 / 24%);
  --code-bg: #15171a;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

body.is-dragging::after {
  content: "Drop the Markdown file to preview it";
  position: fixed;
  inset: 16px;
  display: grid;
  place-items: center;
  border: 2px dashed var(--accent);
  border-radius: 12px;
  background: var(--surface);
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 700;
  pointer-events: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.shell {
  display: flex;
  flex-direction: column;
  flex: 1;
  width: 100%;
  margin: 0;
  padding: 0;
}

.section.no-border {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  padding: 4.5rem 0 1.25rem;
}

.section.no-border > .container {
  display: flex;
  flex-direction: column;
  flex: 1;
  width: 100%;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 0 0 12px;
}

.toolbar-note {
  margin-top: 2px;
  font-size: 0.8rem;
}

.status {
  margin-top: 8px;
  color: var(--accent);
  font-weight: 600;
}

.text-size {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  overflow: hidden;
}

.text-size-button {
  min-height: 42px;
  min-width: 44px;
  padding: 0 10px;
  border: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.text-size-button:hover:not(:disabled),
.text-size-button:focus-visible {
  background: var(--surface-hover);
  outline: none;
}

.text-size-button:disabled {
  color: var(--border-strong);
  opacity: 0.45;
  cursor: default;
}

.shortcuts {
  flex-basis: 100%;
  color: var(--muted);
  font-size: 0.9rem;
}

.shortcuts summary {
  cursor: pointer;
  font-weight: 600;
}

.shortcuts dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 6px 20px;
  margin: 10px 0 0;
}

.shortcut {
  display: flex;
  gap: 8px;
}

.shortcut dt {
  min-width: 72px;
  color: var(--text);
  font-weight: 700;
}

.shortcut dd {
  margin: 0;
}

.toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.doc-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.doc-actions[hidden] {
  display: none;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 6px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
}

.toolbar p {
  margin-bottom: 0;
  color: var(--muted);
}

.toolbar .toolbar-hint {
  margin-top: 4px;
  font-size: 0.9rem;
}

.upload-error {
  margin-top: 8px;
  color: var(--danger);
  font-weight: 600;
}

.upload-button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-contrast);
  font-weight: 700;
  cursor: pointer;
}

.upload-button.is-uploading {
  animation: upload-pulse 480ms ease-out;
}

.upload-button input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.icon-button:hover,
.icon-button:focus-visible {
  border-color: var(--border-strong);
  outline: none;
}

.icon-button[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
}

.icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-moon,
.icon-sun {
  display: none;
}

:root[data-theme="light"] .theme-toggle .icon-moon,
:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

@keyframes upload-pulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 var(--pulse);
  }

  45% {
    transform: scale(1.06);
    box-shadow: 0 0 0 8px var(--shadow);
  }

  100% {
    transform: scale(1);
    box-shadow: 0 0 0 14px transparent;
  }
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  flex: 1;
  min-height: 0;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 18px 40px var(--shadow);
}

.workspace[data-outline="visible"] {
  grid-template-columns: 220px minmax(0, 1fr);
}

.workspace:has(.examples) {
  align-content: safe center;
}

.outline {
  position: sticky;
  top: 5.5rem;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding-right: 4px;
}

.outline-title {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.outline-list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.9rem;
}

.outline-item {
  margin: 2px 0;
}

.outline-item.outline-depth-1 {
  padding-left: 12px;
}

.outline-item a {
  display: block;
  padding: 4px 8px;
  border-left: 2px solid var(--border);
  color: var(--muted);
  text-decoration: none;
}

.outline-item a:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.outline-item a.is-active {
  border-left-color: var(--accent);
  color: var(--accent);
  font-weight: 700;
}

.preview {
  max-width: 760px;
  margin: 0 auto;
  font-size: var(--preview-font-size, 1rem);
  line-height: 1.65;
  min-width: 0;
}

:root[data-font-size="small"] {
  --preview-font-size: 0.875rem;
}

:root[data-font-size="medium"] {
  --preview-font-size: 1rem;
}

:root[data-font-size="large"] {
  --preview-font-size: 1.15rem;
}

:root[data-font-size="xlarge"] {
  --preview-font-size: 1.35rem;
}

.preview h1,
.preview h2,
.preview h3,
.preview h4,
.preview h5,
.preview h6 {
  margin: 1.2em 0 0.35em;
  line-height: 1.15;
  scroll-margin-top: 6rem;
}

.preview h1:first-child,
.preview h2:first-child,
.preview h3:first-child,
.preview h4:first-child,
.preview h5:first-child,
.preview h6:first-child {
  margin-top: 0;
}

.preview blockquote {
  margin: 1em 0;
  padding: 0.1em 0 0.1em 16px;
  border-left: 4px solid var(--border);
  color: var(--muted);
}

.preview a {
  color: var(--accent);
}

.preview table {
  width: 100%;
  margin: 1em 0;
  border-collapse: collapse;
}

.preview th,
.preview td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
}

.preview thead th {
  background: var(--surface-muted);
}

.preview .align-left {
  text-align: left;
}

.preview .align-center {
  text-align: center;
}

.preview .align-right {
  text-align: right;
}

.preview ul,
.preview ol {
  padding-left: 1.4em;
}

.preview .task-item {
  list-style: none;
  margin-left: -1.4em;
}

.preview .task-checkbox {
  margin-right: 6px;
  accent-color: var(--accent);
}

.frontmatter {
  margin-bottom: 24px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: var(--surface-muted);
}

.frontmatter-title {
  margin-bottom: 8px;
  font-size: 1.05rem;
  font-weight: 700;
}

.frontmatter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.frontmatter-tags .tag {
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-contrast);
  font-size: 0.8rem;
  font-weight: 700;
}

.frontmatter-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px 20px;
  margin: 0;
}

.frontmatter-field dt {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.frontmatter-field dd {
  margin: 2px 0 0;
}

.frontmatter-field ul {
  margin: 0;
  padding-left: 1.1em;
}

.examples {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.examples h3 {
  margin-bottom: 12px;
}

.example-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.example-actions button {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.example-actions button:hover,
.example-actions button:focus-visible {
  border-color: var(--border-strong);
  outline: none;
}

.preview code {
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--surface-muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.92em;
}

.preview pre {
  overflow-x: auto;
  padding: 16px;
  border-radius: 6px;
  background: var(--code-bg);
  color: var(--code-text);
}

.preview pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.tok-comment {
  color: var(--tok-comment);
  font-style: italic;
}

.tok-string {
  color: var(--tok-string);
}

.tok-number {
  color: var(--tok-number);
}

.tok-keyword {
  color: var(--tok-keyword);
}

.tok-literal {
  color: var(--tok-literal);
}

.tok-func {
  color: var(--tok-func);
}

.tok-tag {
  color: var(--tok-tag);
}

.tok-attr {
  color: var(--tok-attr);
}

.tok-var {
  color: var(--tok-var);
}

@media (max-width: 768px) {
  .section.no-border {
    padding-top: 4.25rem;
  }

  .toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .toolbar-actions,
  .upload-button {
    width: 100%;
    justify-content: center;
  }

  .workspace {
    padding: 20px;
  }

  .workspace[data-outline="visible"] {
    grid-template-columns: minmax(0, 1fr);
  }

  .outline {
    position: static;
    max-height: none;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
  }
}

@media print {
  .navbar,
  .footer,
  .hero,
  .skip-link,
  #contact,
  .section-header,
  .toolbar,
  .outline,
  .shortcuts,
  .examples,
  .upload-button {
    display: none !important;
  }

  :root {
    --preview-font-size: 11pt;
  }

  body {
    background: #ffffff;
  }

  .section.no-border,
  .shell {
    display: block;
    min-height: 0;
    width: 100%;
    padding: 0;
  }

  .workspace {
    display: block;
    min-height: 0;
    padding: 0;
    border: 0;
    box-shadow: none;
  }

  .preview {
    max-width: none;
  }

  .preview pre {
    background: #f3f4f6;
    color: #111111;
    border: 1px solid var(--border);
    white-space: pre-wrap;
  }

  .preview a {
    color: #111111;
  }
}