:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --paper: #ffffff;
  --ink: #24292f;
  --ink-soft: #40484f;
  --muted: #6b7280;
  --line: #e5e9ef;
  --line-soft: #eef1f5;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eef4ff;
  --note-bg: #e8effc;
  --note-line: #a4bdef;
  --note-ink: #3a5074;
  --code-bg: #0d1117;
  --code-text: #e6edf3;
  --radius: 10px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .05);
  --shadow-md: 0 1px 3px rgba(16, 24, 40, .05), 0 8px 24px rgba(16, 24, 40, .05);
  --font-text: "LXGW WenKai Screen", ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, "Cascadia Code", Menlo, Consolas, "Liberation Mono", "PingFang SC", "Microsoft YaHei", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(1100px 440px at 50% -140px, #e9f0ff 0%, rgba(233, 240, 255, 0) 72%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.9;
  text-rendering: optimizeLegibility;
}

::selection {
  background: #cfe0ff;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(820px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  padding: 44px 0 20px;
}

.site-title {
  display: inline-block;
  color: var(--ink);
  font-size: clamp(30px, 6vw, 42px);
  font-weight: 700;
  line-height: 1.2;
}

.site-title:hover {
  text-decoration: none;
  color: var(--accent);
}

/* Article shell */
.markdown {
  margin-bottom: 48px;
  padding: 10px 36px 36px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
}

.markdown section {
  padding: 28px 0;
  border-top: 1px solid var(--line-soft);
}

.markdown section:first-child {
  border-top: 0;
  padding-top: 20px;
}

h2,
h3,
h4 {
  margin: 0;
  line-height: 1.4;
  color: var(--ink);
  scroll-margin-top: 24px;
}

.markdown h2 {
  margin-bottom: 8px;
  font-size: clamp(22px, 4.4vw, 28px);
  font-weight: 700;
}

.markdown h3 {
  margin-top: 30px;
  font-size: 20px;
  font-weight: 700;
}

.markdown h3::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 0.9em;
  margin-right: 10px;
  vertical-align: -0.08em;
  border-radius: 2px;
  background: linear-gradient(180deg, #5b8def, var(--accent));
}

.markdown h4 {
  margin-top: 26px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ink-soft);
}

.markdown section > p {
  margin: 12px 0 0;
  color: var(--ink-soft);
  text-align: justify;
}

.markdown ul,
.markdown ol {
  margin: 14px 0 0;
  padding-left: 22px;
  color: var(--ink-soft);
  text-align: justify;
}

.markdown li + li {
  margin-top: 6px;
}

.markdown li::marker {
  color: var(--accent);
}

/* Buttons */
button {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}

button:hover {
  background: #f4f6f9;
  border-color: #d3dae4;
}

button:disabled {
  cursor: default;
}

button.copied {
  border-color: #86d29b;
  color: #1a7f37;
  background: #f2fbf5;
}

.primary-action {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.primary-action:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* Generator card */
.generator {
  margin-top: 18px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fafbfd;
}

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

.generator-status {
  min-height: 22px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 13.5px;
}

.generator-status.error {
  color: #b42318;
}

.field-grid {
  display: grid;
  gap: 14px;
  margin-top: 14px;
}

.field-grid label {
  display: grid;
  gap: 6px;
}

.field-grid label > span {
  color: var(--muted);
  font-size: 13.5px;
}

.field-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

input {
  min-width: 0;
  width: 100%;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Blockquote / callout */
blockquote {
  margin: 22px 0 0;
  padding: 8px 14px;
  border-left: 3px solid var(--note-line);
  border-radius: 0 8px 8px 0;
  background: var(--note-bg);
}

blockquote p {
  margin: 0;
  color: var(--note-ink);
  line-height: 1.7;
}

/* A callout acts as a label for the block that follows it */
.markdown blockquote + .code-block,
.markdown blockquote + p,
.markdown blockquote + .table-wrap {
  margin-top: 10px;
}

/* Inline code */
code {
  font-family: var(--font-mono);
}

p code,
li code,
td code,
blockquote code {
  padding: 1px 6px;
  border-radius: 6px;
  background: #eff1f5;
  color: #b3427a;
  font-size: .9em;
}

blockquote code {
  background: rgba(255, 255, 255, .75);
  color: var(--note-ink);
}

/* Code block */
.code-block {
  position: relative;
  overflow: hidden;
  margin: 18px 0 0;
  border-radius: var(--radius);
  background: var(--code-bg);
  box-shadow: var(--shadow-sm);
}

.copy-code {
  position: absolute;
  top: 7px;
  right: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  min-height: 28px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 6px;
  background: rgba(13, 17, 23, .6);
  color: #8b949e;
  cursor: pointer;
  opacity: 0;
  backdrop-filter: blur(2px);
  transition: color .15s ease, background .15s ease, border-color .15s ease, opacity .15s ease;
}

.code-block:hover .copy-code,
.copy-code:focus-visible,
.copy-code.copied {
  opacity: 1;
}

@media (hover: none) {
  .copy-code {
    opacity: .85;
  }
}

.copy-code:hover {
  border-color: #30363d;
  background: #21262d;
  color: #e6edf3;
}

.copy-code.copied {
  border-color: rgba(63, 185, 80, .5);
  background: rgba(46, 160, 67, .15);
  color: #3fb950;
  opacity: 1;
}

.copy-code .icon-check {
  display: none;
}

.copy-code.copied .icon-copy {
  display: none;
}

.copy-code.copied .icon-check {
  display: block;
}

pre {
  margin: 0;
  overflow-x: auto;
  background: transparent;
  color: var(--code-text);
  font-size: 13.5px;
  line-height: 1.5;
  tab-size: 2;
  scrollbar-width: thin;
  scrollbar-color: rgba(110, 118, 129, .35) transparent;
}

pre::-webkit-scrollbar {
  height: 6px;
}

pre::-webkit-scrollbar-thumb {
  border-radius: 3px;
  background: rgba(110, 118, 129, .35);
}

pre:hover::-webkit-scrollbar-thumb {
  background: rgba(110, 118, 129, .6);
}

pre::-webkit-scrollbar-track {
  background: transparent;
  margin: 0 8px;
}

pre code {
  display: block;
  min-width: max-content;
  padding: 14px 18px;
}

/* Syntax tokens */
.tok-comment { color: #7d8590; font-style: italic; }
.tok-string { color: #a5d6ff; }
.tok-keyword { color: #ff7b72; }
.tok-property { color: #79c0ff; }
.tok-number { color: #d2a8ff; }
.tok-operator { color: #ff9d6b; }
.tok-punctuation { color: #8b949e; }
.tok-section { color: #ffa657; font-weight: 600; }

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

th,
td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}

tbody tr:nth-child(even) {
  background: #fafbfd;
}

tr:last-child td {
  border-bottom: 0;
}

th {
  background: #f4f6fa;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .site-header {
    padding: 32px 0 14px;
  }

  .markdown {
    padding: 4px 18px 26px;
    border-radius: 12px;
  }

  .markdown section {
    padding: 22px 0;
  }

  .field-row {
    grid-template-columns: 1fr;
  }

  .generator-actions {
    display: grid;
  }

  pre {
    font-size: 12.5px;
  }
}