/* Same design language as the extension's settings page (src/options/index.css): VS Code's
   light/dark colors, square corners, flat controls, a colored left border for focus. */
:root {
  --bg: #ffffff;
  --bg-alt: #f8f8f8;
  --fg: #3b3b3b;
  --fg-strong: #1f1f1f;
  --muted: #6f6f6f;
  --line: #e5e5e5;
  --input-bg: #ffffff;
  --input-border: #cecece;
  --focus: #0090f1;
  --accent: #005fb8;
  --accent-hover: #0258a8;
  --link: #005fb8;
  --accent-fg: #ffffff;
  --hover: rgba(0, 0, 0, 0.04);
  --selected: rgba(0, 95, 184, 0.08);
  --button-bg: #e5e5e5;
  --button-hover: #cccccc;
  --code-bg: rgba(0, 0, 0, 0.06);
  /* Editor preview: the extension's wikidot-light theme. */
  --ed-bg: #ffffff;
  --ed-bar: #f3f3f3;
  --ed-fg: #000000;
  --ed-gutter: #237893;
  --ed-line: #f0f0f0;
  --ed-heading: #0451a5;
  --ed-tag: #800000;
  --ed-attr: #e50000;
  --ed-value: #0000ff;
  --ed-link: #006ab1;
  --ed-var: #795e26;
  --ed-suggest-bg: #f8f8f8;
  --ed-suggest-border: #c8c8c8;
  --ed-suggest-selected: #0060c0;
  --ed-match: #0066bf;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.16);
  --wd-button-top: #ffffff;
  --wd-button-bottom: #dcdcdc;
  --wd-button-border: #b4b4b4;
  --wd-button-fg: #333333;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1e1e1e;
    --bg-alt: #181818;
    --fg: #cccccc;
    --fg-strong: #e7e7e7;
    --muted: #9d9d9d;
    --line: #2b2b2b;
    --input-bg: #313131;
    --input-border: #3c3c3c;
    --focus: #007fd4;
    --accent: #0078d4;
    --accent-hover: #026ec1;
    --link: #4daafc;
    --accent-fg: #ffffff;
    --hover: rgba(255, 255, 255, 0.04);
    --selected: rgba(0, 120, 212, 0.18);
    --button-bg: #313131;
    --button-hover: #3c3c3c;
    --code-bg: rgba(255, 255, 255, 0.1);
    /* wikidot-dark */
    --ed-bg: #1e1e1e;
    --ed-bar: #252526;
    --ed-fg: #d4d4d4;
    --ed-gutter: #858585;
    --ed-line: #282828;
    --ed-heading: #569cd6;
    --ed-tag: #569cd6;
    --ed-attr: #9cdcfe;
    --ed-value: #ce9178;
    --ed-link: #4fc1ff;
    --ed-var: #dcdcaa;
    --ed-suggest-bg: #252526;
    --ed-suggest-border: #454545;
    --ed-suggest-selected: #04395e;
    --ed-match: #2aaaff;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.36);
    --wd-button-top: #4a4a4a;
    --wd-button-bottom: #353535;
    --wd-button-border: #555555;
    --wd-button-fg: #d4d4d4;
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
  border-radius: 0;
}

html {
  scroll-behavior: smooth;
  /* Anchored sections end up below the sticky top bar. */
  scroll-padding-top: 64px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe WPC', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei',
    'Ubuntu', 'Droid Sans', sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

/* Language: both texts are in the page, one is hidden. */
html:not(.en) .en,
html.en .zh {
  display: none;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible {
  outline: 1px solid var(--focus);
  outline-offset: 2px;
}

code {
  padding: 0 4px;
  background: var(--code-bg);
  color: var(--fg);
  font-family: Consolas, 'Droid Sans Mono', 'Courier New', monospace;
  font-size: 0.9em;
}

h2 {
  margin: 0 0 8px;
  color: var(--fg-strong);
  font-size: 28px;
  font-weight: 600;
}

h3 {
  margin: 0 0 6px;
  color: var(--fg-strong);
  font-size: 17px;
  font-weight: 600;
}

/* Top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.topbar-inner {
  display: flex;
  gap: 24px;
  align-items: center;
  height: 52px;
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--fg-strong);
  font-size: 17px;
  font-weight: 600;
}

.brand:hover {
  text-decoration: none;
}

.topnav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

/* Like the settings menu, a colored edge marks the hovered entry. */
.topnav a {
  padding: 4px 10px;
  border-bottom: 2px solid transparent;
  color: var(--fg);
  font-size: 15px;
}

.topnav a:hover {
  border-bottom-color: var(--accent);
  background: var(--hover);
  color: var(--fg-strong);
  text-decoration: none;
}

/* Buttons: flat, square, as on the settings page. */
button,
.button {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  height: 30px;
  padding: 0 14px;
  border: 0;
  background: var(--button-bg);
  color: var(--fg);
  font: inherit;
  font-size: 15px;
  cursor: pointer;
}

button:hover,
.button:hover {
  background: var(--button-hover);
  text-decoration: none;
}

.button {
  height: 38px;
  padding: 0 20px;
}

.button.primary {
  background: var(--accent);
  color: var(--accent-fg);
}

.button.primary:hover {
  background: var(--accent-hover);
}

.button svg {
  width: 16px;
  height: 16px;
}

.lang {
  flex: none;
}

/* Hero */
.hero {
  padding: 72px 0 80px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  padding-left: 10px;
  border-left: 2px solid var(--accent);
  color: var(--muted);
  font-size: 15px;
}

h1 {
  margin: 0;
  color: var(--fg-strong);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.25;
}

.lead {
  margin: 20px 0 28px;
  color: var(--muted);
  font-size: 17px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.actions.center {
  justify-content: center;
  margin-top: 32px;
}

.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 24px 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 14px;
  list-style: none;
}

.facts li::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  background: var(--accent);
  vertical-align: middle;
}

/* Editor preview */
.editor {
  margin: 0;
  border: 1px solid var(--ed-suggest-border);
  background: var(--ed-bg);
  box-shadow: var(--shadow);
}

/* wikidot's editor toolbar: three rows of small bevelled buttons above the text box. */
.wd-toolbar {
  padding: 6px 8px 4px;
  border-bottom: 1px solid var(--ed-suggest-border);
  background: var(--ed-bar);
  cursor: default;
  user-select: none;
}

.wd-toolbar div {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  align-items: center;
  margin-bottom: 2px;
}

.wd-toolbar span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--wd-button-border);
  border-radius: 3px;
  background: linear-gradient(var(--wd-button-top), var(--wd-button-bottom));
  color: var(--wd-button-fg);
  font-family: Verdana, Arial, Helvetica, sans-serif;
  font-size: 11px;
  line-height: 1;
}

.wd-toolbar span:hover {
  border-color: var(--wd-button-fg);
}

.wd-toolbar .small {
  width: auto;
  min-width: 22px;
  padding: 0 3px;
  font-size: 9px;
}

.wd-toolbar .mono {
  font-family: Consolas, 'Courier New', monospace;
  font-size: 13px;
  font-weight: bold;
}

.wd-toolbar sup,
.wd-toolbar sub {
  font-size: 8px;
}

.wd-toolbar svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.2;
}

/* The black bars between button groups. */
.wd-toolbar em {
  width: 2px;
  height: 20px;
  margin: 0 4px;
  background: var(--wd-button-fg);
  opacity: 0.6;
}

.editor-body {
  position: relative;
  overflow: hidden;
  /* Room below the last line for the suggest widget. */
  padding: 10px 0 84px;
  color: var(--ed-fg);
  font-family: Consolas, 'Droid Sans Mono', 'Courier New', monospace;
  font-size: 14px;
  line-height: 21px;
}

.code {
  margin: 0;
  padding: 0;
  counter-reset: line;
  list-style: none;
}

.code li {
  min-height: 21px;
  position: relative;
  padding-left: 56px;
  counter-increment: line;
  white-space: nowrap;
}

.code li::before {
  content: counter(line);
  /* Out of the flow, so the markup's leading whitespace collapses at the line start. */
  position: absolute;
  left: 0;
  width: 32px;
  color: var(--ed-gutter);
  text-align: right;
}

.code .cursor-line {
  background: var(--ed-line);
}

.code .h {
  color: var(--ed-heading);
  font-weight: bold;
}

.code .t {
  color: var(--ed-tag);
}

.code .a {
  color: var(--ed-attr);
}

.code .v {
  color: var(--ed-value);
}

.code .l {
  color: var(--ed-link);
  text-decoration: underline;
}

.code .var {
  color: var(--ed-var);
}

.caret {
  display: inline-block;
  width: 2px;
  height: 18px;
  margin-left: 1px;
  background: var(--ed-fg);
  vertical-align: -4px;
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .caret,
  .tick.shake {
    animation: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Suggest widget below the cursor, as Monaco draws it. */
.suggest {
  position: absolute;
  top: 241px;
  left: 76px;
  width: 300px;
  max-width: calc(100% - 88px);
  border: 1px solid var(--ed-suggest-border);
  background: var(--ed-suggest-bg);
  box-shadow: var(--shadow);
  font-size: 13px;
  line-height: 22px;
}

.suggest .item {
  display: flex;
  gap: 6px;
  align-items: center;
  overflow: hidden;
  padding: 0 8px;
  white-space: nowrap;
}

.suggest .item.selected {
  background: var(--ed-suggest-selected);
  color: #ffffff;
}

.suggest i {
  flex: none;
  width: 11px;
  height: 11px;
  margin-right: 2px;
  border: 1px solid currentColor;
  opacity: 0.7;
}

.suggest b {
  color: var(--ed-match);
}

.suggest .selected b {
  color: inherit;
}

.suggest em {
  overflow: hidden;
  margin-left: auto;
  padding-left: 12px;
  font-style: normal;
  opacity: 0.7;
  text-overflow: ellipsis;
}

/* Bands */
.band {
  padding: 72px 0;
}

.band.alt {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-alt);
}

.section-lead {
  max-width: 680px;
  margin: 0 0 32px;
  color: var(--muted);
  font-size: 17px;
}

/* Features: rows like the settings, with a hover background and colored left edge. */
.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.feature {
  padding: 24px 24px 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  box-shadow: inset 2px 0 0 transparent;
}

.feature:hover {
  background: var(--hover);
  box-shadow: inset 2px 0 0 var(--accent);
}

.feature svg {
  width: 24px;
  height: 24px;
  margin-bottom: 12px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-linecap: square;
}

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

/* Settings */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.split .section-lead {
  margin-bottom: 24px;
}

.checks {
  margin: 0;
  padding: 0;
  list-style: none;
}

.checks li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 4px 0;
}

/* Looks like a checked box and can be clicked, but only shakes: these stay on. */
.tick {
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  padding: 0;
  border: 0;
  background: var(--accent)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3 3 7-7' fill='none' stroke='%23fff' stroke-width='1.6'/%3E%3C/svg%3E")
    center / 14px no-repeat;
}

.tick:hover {
  background-color: var(--accent-hover);
}

.tick:focus-visible {
  outline-offset: 1px;
}

.tick.shake {
  animation: shake 0.4s;
}

@keyframes shake {
  20% {
    transform: translateX(-3px);
  }
  40% {
    transform: translateX(3px);
  }
  60% {
    transform: translateX(-2px);
  }
  80% {
    transform: translateX(2px);
  }
}

/* A copy of the settings page: the categories switch, the settings are only shown. */
.panel {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  border: 1px solid var(--line);
  background: var(--bg);
  box-shadow: var(--shadow);
  font-size: 15px;
}

.panel-nav {
  padding: 16px 0;
  border-right: 1px solid var(--line);
}

.panel-nav button {
  display: block;
  width: 100%;
  height: auto;
  padding: 6px 12px;
  border-left: 2px solid transparent;
  background: none;
  color: var(--fg);
  text-align: left;
}

.panel-nav button:hover {
  background: var(--hover);
  color: var(--fg-strong);
}

.panel-nav button[aria-current] {
  border-left-color: var(--accent);
  background: var(--selected);
  color: var(--fg-strong);
  font-weight: 600;
}

.panel-nav button:focus-visible {
  outline-offset: -1px;
}

/* All categories share one grid cell, so the panel keeps the height of the longest. */
.panel-body {
  display: grid;
  padding: 12px 16px;
  cursor: default;
}

.category {
  grid-area: 1 / 1;
}

.category[inert] {
  visibility: hidden;
}

.panel .description {
  margin: 2px 0 6px;
  color: var(--muted);
}

.setting {
  margin: 0 -16px;
  padding: 10px 14px 12px;
  border-left: 2px solid transparent;
}

.setting:hover {
  background: var(--hover);
}

.title {
  color: var(--fg-strong);
  font-weight: 600;
}

.select,
.number {
  height: 30px;
  margin-top: 4px;
  padding: 0 8px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  line-height: 28px;
}

.select {
  width: 200px;
  max-width: 100%;
  background: var(--input-bg)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4' fill='none' stroke='%238a8a8a' stroke-width='1.5'/%3E%3C/svg%3E")
    right 6px center / 16px no-repeat;
}

.number {
  width: 100px;
}

.check {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-top: 4px;
  color: var(--muted);
}

.box {
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
}

.box.on {
  border-color: var(--accent);
  background: var(--accent)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3 3 7-7' fill='none' stroke='%23fff' stroke-width='1.6'/%3E%3C/svg%3E")
    center / 14px no-repeat;
}

/* Install */
.install {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.install-card {
  padding: 24px 28px 26px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--accent);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.install-card > p {
  margin: 0 0 16px;
}

.install-card > .button {
  margin-top: auto;
}

details {
  align-self: stretch;
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

summary {
  padding: 12px 0 4px;
  color: var(--fg-strong);
  cursor: pointer;
}

summary:focus-visible {
  outline: 1px solid var(--focus);
}

.install-card details ol {
  margin: 8px 0 0;
}

.requires {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14px;
}

.install-card ol {
  margin: 0 0 20px;
  padding: 0;
  counter-reset: step;
  list-style: none;
}

.install-card li {
  position: relative;
  padding: 6px 0 6px 36px;
  counter-increment: step;
}

.install-card li::before {
  content: counter(step);
  position: absolute;
  top: 7px;
  left: 0;
  width: 22px;
  height: 22px;
  background: var(--selected);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  line-height: 22px;
  text-align: center;
}

/* Build from source */
.terminal {
  overflow-x: auto;
  margin: 0;
  padding: 20px 24px;
  border: 1px solid var(--line);
  background: #1e1e1e;
  color: #cccccc;
  font-family: Consolas, 'Droid Sans Mono', 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.7;
}

.terminal code {
  padding: 0;
  background: none;
  color: inherit;
  font-size: inherit;
}

.terminal .prompt {
  color: #569cd6;
  user-select: none;
}

.terminal .comment {
  color: #6a9955;
}

/* Footer */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  align-items: center;
}

.brand.small {
  font-size: 15px;
}

.site-footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.muted {
  margin: 0 0 0 auto;
  color: var(--muted);
}

/* Narrow screens */
@media (max-width: 960px) {
  .hero-inner,
  .split {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .wrap {
    padding: 0 16px;
  }

  .topbar-inner {
    gap: 12px;
  }

  /* Only GitHub and the language button stay in the bar. */
  .topnav a:not([target]) {
    display: none;
  }

  .hero {
    padding: 40px 0 48px;
  }

  h1 {
    font-size: 30px;
  }

  h2 {
    font-size: 24px;
  }

  .band {
    padding: 48px 0;
  }

  .features,
  .install {
    grid-template-columns: minmax(0, 1fr);
  }

  .editor-body {
    font-size: 12px;
  }

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

  .panel-nav {
    display: flex;
    overflow-x: auto;
    padding: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .panel-nav button {
    flex: none;
    width: auto;
    padding: 10px 12px;
    border-bottom: 2px solid transparent;
    border-left: 0;
  }

  .panel-nav button[aria-current] {
    border-bottom-color: var(--accent);
  }

  .muted {
    margin-left: 0;
  }
}