:root {
  color-scheme: light;
  --pg-canvas: #ffffff;
  --pg-surface: #ffffff;
  --pg-soft: #f7f7f7;
  --pg-text: #111111;
  --pg-muted: #6b6b6b;
  --pg-line: #dedede;
  --pg-line-strong: #a3a3a3;
  --pg-accent: #111111;
  --pg-accent-hover: #333333;
  --pg-danger: #b42318;
  --ink: var(--pg-text);
  --muted: var(--pg-muted);
  --paper: var(--pg-canvas);
  --panel: var(--pg-surface);
  --soft: var(--pg-soft);
  --line: var(--pg-line);
  --line-strong: var(--pg-line-strong);
  --accent: var(--pg-accent);
  --accent-dark: var(--pg-accent-hover);
  --accent-soft: #eeeeee;
  --code: var(--pg-soft);
  --danger: var(--pg-danger);
  --gutter: var(--pg-soft);
  --added: #eef7f0;
  --added-strong: #cfe8d4;
  --removed: #fdf0ef;
  --removed-strong: #f1cecb;
  --shadow: none;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { min-width: 320px; background: var(--pg-canvas); }

body {
  margin: 0;
  background: var(--pg-canvas);
  color: var(--pg-text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-color: var(--pg-line-strong);
  text-underline-offset: 3px;
}

a:hover { text-decoration-color: var(--pg-text); }

h1 {
  margin: 0;
  color: var(--pg-text);
  font-family: inherit;
  font-size: clamp(26px, 4vw, 32px);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.hint,
.status,
.muted,
.intro,
.privacy,
.count,
.stats { color: var(--pg-muted); }

button,
input,
textarea,
select { color: var(--pg-text); font: inherit; }

button,
.file-button,
select {
  min-height: 34px;
  border: 1px solid var(--pg-line);
  border-radius: 2px;
  background: var(--pg-surface);
  color: var(--pg-text);
  cursor: pointer;
  font-weight: 550;
  transition: none;
}

button:hover,
.file-button:hover,
select:hover {
  border-color: var(--pg-line-strong);
  background: var(--pg-soft);
  color: var(--pg-text);
}

button:active,
.file-button:active { transform: none; }

button:disabled { cursor: not-allowed; opacity: 0.4; }

button.primary,
.primary {
  border-color: var(--pg-text);
  background: var(--pg-text);
  color: #ffffff;
}

button.primary:hover,
.primary:hover {
  border-color: var(--pg-accent-hover);
  background: var(--pg-accent-hover);
  color: #ffffff;
}

button:focus-visible,
textarea:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 2px solid var(--pg-text);
  outline-offset: 2px;
}

textarea,
input[type="text"],
select {
  border-color: var(--pg-line);
  border-radius: 2px;
  background: var(--pg-surface);
}

textarea:focus,
input[type="text"]:focus,
select:focus { border-color: var(--pg-line-strong); }

textarea::placeholder,
input::placeholder { color: #9a9a9a; }

input[type="checkbox"],
input[type="radio"],
input[type="range"] { accent-color: var(--pg-text); }

code,
kbd,
textarea,
input[type="text"] {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

body.pg-home {
  min-height: 100vh;
  padding: 0 24px;
  background:
    radial-gradient(circle at 50% 0, #f5f5f5 0, rgba(245, 245, 245, 0) 420px),
    var(--pg-canvas);
}

.pg-home main {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 64px 0 36px;
}

.home-hero { margin-bottom: 38px; }

.home-brand {
  display: flex;
  margin-bottom: 40px;
  align-items: center;
  gap: 9px;
  color: #555555;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.home-brand-mark {
  display: grid;
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: var(--pg-text);
  color: #ffffff;
  font-size: 12px;
  letter-spacing: 0;
  place-items: center;
}

.pg-home h1 {
  margin-bottom: 10px;
  font-size: clamp(36px, 6vw, 52px);
  font-weight: 680;
  letter-spacing: -0.055em;
}

.home-hero > p {
  margin: 0;
  color: var(--pg-muted);
  font-size: 15px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.tool-card {
  --tool-color: #315cea;
  --tool-tint: #eef2ff;
  position: relative;
  display: grid;
  min-height: 174px;
  padding: 22px;
  overflow: hidden;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: start;
  gap: 17px;
  border: 1px solid var(--pg-line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--pg-text);
  text-decoration: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.tool-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: var(--tool-color);
  content: "";
  opacity: 0;
  transition: opacity 160ms ease;
}

.tool-card:hover {
  border-color: #b8b8b8;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.07);
  transform: translateY(-2px);
}

.tool-card:hover::before { opacity: 1; }

.tool-card--transform {
  --tool-color: #b54708;
  --tool-tint: #fff4e8;
}

.tool-card--qrcode {
  --tool-color: #08765d;
  --tool-tint: #e8f7f2;
}

.tool-card--diff {
  --tool-color: #9b2c66;
  --tool-tint: #fbeef5;
}

.tool-card--markdown {
  --tool-color: #6d3bc1;
  --tool-tint: #f3edff;
}

.tool-icon {
  display: grid;
  width: 48px;
  height: 48px;
  border-radius: 11px;
  background: var(--tool-tint);
  color: var(--tool-color);
  place-items: center;
}

.tool-icon svg {
  width: 30px;
  height: 30px;
  overflow: visible;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.2;
}

.tool-card--qrcode .tool-icon svg {
  fill: currentColor;
  stroke: none;
}

.tool-content { display: grid; min-width: 0; }

.tool-name {
  margin-top: 1px;
  font-size: 19px;
  font-weight: 650;
  letter-spacing: -0.025em;
}

.tool-description {
  margin-top: 4px;
  color: var(--pg-muted);
  font-size: 13px;
}

.tool-tags {
  display: flex;
  margin-top: 24px;
  flex-wrap: wrap;
  gap: 6px;
}

.tool-tags span {
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--pg-soft);
  color: #626262;
  font-size: 11px;
}

.tool-arrow {
  color: #9a9a9a;
  font-size: 18px;
  line-height: 1;
  transition: color 160ms ease, transform 160ms ease;
}

.tool-card:hover .tool-arrow {
  color: var(--tool-color);
  transform: translate(2px, -2px);
}

.home-footer {
  display: flex;
  margin-top: 28px;
  align-items: center;
  justify-content: space-between;
  color: #888888;
  font-size: 12px;
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 7px;
  border-radius: 50%;
  background: #2c9b69;
  vertical-align: 1px;
}

body.pg-base64,
body.pg-text-transform,
body.pg-qrcode {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 48px 24px;
}

.pg-base64 header,
.pg-text-transform header {
  display: flex;
  margin-bottom: 20px;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.pg-base64 header a,
.pg-text-transform header a {
  color: var(--pg-muted);
  font-size: 13px;
  white-space: nowrap;
}

.pg-base64 .hint,
.pg-text-transform .hint,
.pg-qrcode .muted { font-size: 13px; }

.pg-base64 .workspace { gap: 16px; }

.pg-base64 textarea,
.pg-text-transform textarea,
.pg-qrcode textarea {
  border: 1px solid var(--pg-line);
  border-radius: 2px;
  background: var(--pg-surface);
  color: var(--pg-text);
}

.pg-base64 textarea { min-height: 360px; }
.pg-base64 .actions { gap: 6px; }
.pg-base64 .footer { color: var(--pg-muted); }
.status.error,
.error { color: var(--pg-danger); }

.pg-text-transform .controls {
  margin-top: 24px;
  padding: 24px 0;
  gap: 22px 28px;
  border: 0;
  border-top: 1px solid var(--pg-line);
  border-bottom: 1px solid var(--pg-line);
  border-radius: 0;
  background: transparent;
}

.pg-text-transform .control {
  display: grid;
  gap: 8px;
}

.pg-text-transform .control label { margin-bottom: 0; }

.pg-text-transform input[type="text"] {
  min-height: 42px;
  padding: 9px 11px;
}

.pg-text-transform .options {
  padding-top: 2px;
  gap: 24px;
}

.pg-text-transform .field { margin-top: 32px; }

.pg-text-transform .field-head {
  margin-bottom: 10px;
  align-items: center;
}

.pg-text-transform .result-head { gap: 12px; }

.pg-text-transform button {
  min-height: 38px;
  padding: 0 14px;
}

.pg-text-transform .preview {
  border-color: var(--pg-line);
  border-radius: 2px;
  background: var(--pg-surface);
}

.pg-text-transform .preview li { border-bottom-color: var(--pg-line); }
.pg-text-transform .empty { color: var(--pg-muted); }

@media (max-width: 600px) {
  .pg-text-transform .controls {
    margin-top: 20px;
    padding: 20px 0;
    gap: 18px;
  }

  .pg-text-transform .field { margin-top: 26px; }
}

body.pg-qrcode { width: min(100%, 680px); }
.pg-qrcode h1 { margin-bottom: 8px; }
.pg-qrcode .intro { margin-bottom: 28px; }

.pg-qrcode textarea {
  min-height: 100px;
  padding: 12px;
  line-height: 1.55;
}

.pg-qrcode .preview {
  min-height: 220px;
  margin: 24px 0 12px;
  align-content: center;
}

.pg-qrcode .actions { margin: 12px 0; }

.pg-qrcode button,
.pg-qrcode select { min-height: 36px; padding: 0 12px; }

.pg-qrcode details { margin-top: 24px; border-top: 1px solid var(--pg-line); }

.pg-qrcode summary {
  padding: 14px 0;
  color: var(--pg-text);
  cursor: pointer;
  font-weight: 550;
}

.pg-qrcode fieldset { margin: 0; padding: 4px 0 0; border: 0; }

.pg-qrcode legend {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

body.pg-markdown,
body.pg-text-diff {
  background: var(--pg-canvas);
  color: var(--pg-text);
  font-family: inherit;
}

.pg-markdown .shell,
.pg-text-diff .shell { padding: 24px; }

.pg-markdown .masthead,
.pg-text-diff .masthead {
  min-height: 40px;
  margin: 0 0 20px;
  gap: 14px;
}

.pg-markdown h1,
.pg-text-diff h1 {
  color: var(--pg-text);
  font-family: inherit;
  font-size: 26px;
  font-weight: 650;
}

.pg-markdown h1 span,
.pg-text-diff h1 span { color: inherit; }

.pg-markdown h1::before,
.pg-text-diff h1::before { content: none; }

.pg-markdown .intro,
.pg-text-diff .intro { font-size: 12px; }

.pg-markdown .home {
  display: inline-grid;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--pg-muted);
  place-items: center;
}

.pg-markdown .home:hover { background: transparent; color: var(--pg-text); }

.pg-markdown .privacy::before,
.pg-markdown .dot,
.pg-text-diff .dot { display: none; }

.pg-markdown .workspace,
.pg-text-diff .workspace {
  overflow: hidden;
  border: 1px solid var(--pg-line);
  border-radius: 2px;
  background: var(--pg-surface);
  box-shadow: none;
}

.pg-markdown .toolbar,
.pg-markdown .pane-head,
.pg-markdown .footer,
.pg-text-diff .toolbar,
.pg-text-diff .editor-head,
.pg-text-diff .result-head { background: var(--pg-surface); }

.pg-markdown .toolbar,
.pg-text-diff .toolbar { min-height: 48px; padding: 7px 10px; }

.pg-markdown button,
.pg-markdown .file-button,
.pg-text-diff button {
  border-radius: 2px;
  font-family: inherit;
  font-weight: 550;
}

.pg-markdown .quiet,
.pg-text-diff .text-button {
  border-color: transparent;
  background: transparent;
  color: var(--pg-muted);
}

.pg-markdown .quiet:hover,
.pg-text-diff .text-button:hover {
  border-color: var(--pg-line);
  background: var(--pg-soft);
  color: var(--pg-text);
}

.pg-markdown .switch,
.pg-markdown .mode-select,
.pg-text-diff .switch,
.pg-text-diff .select-all { color: var(--pg-muted); font-weight: 500; }

.pg-markdown .mode-select select,
.pg-markdown .tabs,
.pg-text-diff .merge-all,
.pg-text-diff kbd {
  border-color: var(--pg-line);
  border-radius: 2px;
  background: var(--pg-surface);
}

.pg-markdown .tabs { padding: 2px; }
.pg-markdown .tab { border-radius: 1px; }

.pg-markdown .tab[aria-selected="true"] {
  background: var(--pg-text);
  color: #ffffff;
}

.pg-markdown .pane-head,
.pg-text-diff .editor-head,
.pg-text-diff .result-head { background: var(--pg-soft); }

.pg-markdown #markdown-input,
.pg-markdown #html-source,
.pg-text-diff textarea,
.pg-text-diff textarea:focus,
.pg-text-diff .result-panel,
.pg-text-diff .diff-wrap {
  background: var(--pg-surface);
  color: var(--pg-text);
}

.pg-markdown #markdown-input,
.pg-markdown #html-source { padding: 20px; }

.pg-markdown .drop-overlay {
  border-color: var(--pg-text);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--pg-text);
}

.pg-markdown .toast {
  border: 0;
  border-radius: 2px;
  background: var(--pg-text);
  color: #ffffff;
  box-shadow: none;
}

.pg-text-diff .badge {
  border: 1px solid var(--pg-line);
  border-radius: 2px;
  background: var(--pg-surface);
  color: var(--pg-muted);
}

.pg-text-diff .badge.add {
  border-color: #cfe3d3;
  background: var(--added);
  color: #256b35;
}

.pg-text-diff .badge.remove {
  border-color: #efd2cf;
  background: var(--removed);
  color: #9d332b;
}

.pg-text-diff .badge.modify {
  border-color: var(--pg-line);
  background: var(--pg-soft);
  color: var(--pg-muted);
}

.pg-text-diff .cell { border-bottom-color: #eeeeee; }

.pg-text-diff .merge-cell,
.pg-text-diff .empty-cell,
.pg-text-diff .number { background: var(--pg-soft); }

.pg-text-diff .inline-del,
.pg-text-diff .inline-add { border-radius: 0; }

@media (max-width: 760px) {
  body.pg-home { padding: 0 18px; }

  .pg-home main { padding-top: 36px; }
  .home-brand { margin-bottom: 32px; }
  .home-hero { margin-bottom: 30px; }

  body.pg-base64,
  body.pg-text-transform,
  body.pg-qrcode { padding: 28px 16px; }

  .pg-base64 header,
  .pg-text-transform header {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .pg-base64 textarea { min-height: 220px; }

  .pg-markdown .shell,
  .pg-text-diff .shell { padding: 12px; }

  .pg-markdown .masthead,
  .pg-text-diff .masthead { margin-bottom: 12px; }
}

@media (max-width: 640px) {
  .tool-grid { grid-template-columns: 1fr; }
  .tool-card { min-height: 148px; }
  .tool-tags { margin-top: 18px; }
}

@media (max-width: 420px) {
  .pg-home h1 { font-size: 34px; }

  .tool-card {
    padding: 18px;
    grid-template-columns: 44px minmax(0, 1fr) auto;
    gap: 14px;
  }

  .tool-icon { width: 44px; height: 44px; }
  .home-footer span:last-child { display: none; }
}

@media (max-width: 480px) {
  .pg-markdown .toolbar-group.options {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 7px;
  }

  .pg-markdown .toolbar-group.options .switch,
  .pg-markdown .toolbar-group.options .mode-select { grid-column: 1 / -1; }

  .pg-markdown .mode-select {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
  }

  .pg-markdown .mode-select select { width: 100%; }
  .pg-markdown #copy-button { justify-self: stretch; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}