:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --panel: #ffffff;
  --panel-alt: #f0f5fb;
  --text: #172033;
  --muted: #5f6d80;
  --border: #d8e0eb;
  --code-bg: #101827;
  --code-text: #f7fafc;
  --accent: #2367c8;
  --accent-dark: #174f9e;
  --accent-soft: #e9f2ff;
  --pass-bg: #e9f7ef;
  --pass: #17663a;
  --fail-bg: #fde8e8;
  --fail: #9b1c1c;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 62px;
  padding: 0 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
}

.site-logo {
  color: var(--text);
  font-size: 21px;
  font-weight: 750;
  text-decoration: none;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.topnav a,
.nav a {
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
}

.topnav a {
  padding: 8px 10px;
}

.topnav a:hover,
.nav a:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: calc(100vh - 62px);
}

.sidebar {
  position: sticky;
  top: 62px;
  height: calc(100vh - 62px);
  padding: 28px 22px;
  border-right: 1px solid var(--border);
  background: var(--panel);
  overflow: auto;
}

.sidebar h2 {
  margin: 0 0 16px;
  font-size: 18px;
}

.nav {
  display: grid;
  gap: 5px;
}

.nav a {
  display: block;
  padding: 7px 8px;
}

.content {
  width: min(100%, 1320px);
  padding: 42px 42px 84px;
}

.hero {
  padding: 54px 0 44px;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 750;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 900px;
  margin: 0 0 16px;
  font-size: 52px;
  line-height: 1.06;
  letter-spacing: 0;
}

.hero p {
  max-width: 880px;
  margin: 0;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
}

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

.button:hover,
button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

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

section {
  padding: 34px 0;
  border-bottom: 1px solid var(--border);
}

section:last-child {
  border-bottom: 0;
}

h2 {
  margin: 0 0 14px;
  font-size: 29px;
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin: 24px 0 10px;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: 0;
}

p {
  margin: 0 0 14px;
}

.quick-panels,
.feature-grid,
.cheat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 16px 0 24px;
}

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

.quick-panels article,
.feature-grid article,
.cheat-grid > div,
.example-pair > div {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
}

.quick-panels h2,
.feature-grid h3,
.cheat-grid strong,
.example-pair h3 {
  display: block;
  margin: 0 0 8px;
}

.cheat-grid code {
  display: block;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.example-pair,
.playground-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  margin-top: 16px;
}

code {
  border-radius: 4px;
  background: #eef2f7;
  padding: 1px 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}

pre {
  margin: 14px 0 20px;
  padding: 16px;
  border-radius: 8px;
  background: var(--code-bg);
  color: var(--code-text);
  overflow: auto;
}

pre code {
  display: block;
  padding: 0;
  background: transparent;
  color: inherit;
  font-size: 14px;
  line-height: 1.45;
}

table {
  width: 100%;
  margin: 14px 0 22px;
  border-collapse: collapse;
  background: var(--panel);
}

th,
td {
  padding: 10px 12px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: #eef2f7;
}

.syntax-table {
  table-layout: fixed;
}

.syntax-table code {
  overflow-wrap: anywhere;
}

.sample-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
}

.editor-pane,
.preview-pane,
.html-pane {
  display: grid;
  gap: 8px;
}

.editor-pane span,
.preview-pane span,
.html-pane span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

#playground-input {
  min-height: 380px;
  resize: vertical;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font: 14px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

#playground-preview {
  width: 100%;
  min-height: 380px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #ffffff;
}

.html-pane {
  grid-column: 1 / -1;
}

.html-pane pre {
  min-height: 180px;
  margin-top: 0;
}

.table-scroll {
  margin: 14px 0 22px;
  overflow-x: auto;
}

.comparison-table {
  min-width: 1210px;
  table-layout: fixed;
}

/* Columns: Feature | Preview | PHP | Go | TypeScript | Remarkd source | Expected HTML */
.comparison-table th:nth-child(1),
.comparison-table td:nth-child(1) {
  width: 140px;
}

.comparison-table th:nth-child(2),
.comparison-table td:nth-child(2) {
  width: 300px;
}

.comparison-table th:nth-child(3),
.comparison-table td:nth-child(3),
.comparison-table th:nth-child(4),
.comparison-table td:nth-child(4) {
  width: 64px;
  text-align: center;
}

.comparison-table th:nth-child(5),
.comparison-table td:nth-child(5) {
  width: 100px;
  text-align: center;
}

.comparison-table th:nth-child(6),
.comparison-table td:nth-child(6) {
  width: 220px;
}

.comparison-table th:nth-child(7),
.comparison-table td:nth-child(7) {
  width: 320px;
}

/* Source + Expected HTML columns hidden by default (toggled on demand). */
.comparison-table.hide-extra {
  min-width: 660px;
}

.comparison-table.hide-extra th:nth-child(6),
.comparison-table.hide-extra td:nth-child(6),
.comparison-table.hide-extra th:nth-child(7),
.comparison-table.hide-extra td:nth-child(7) {
  display: none;
}

.table-controls {
  margin: 4px 0 12px;
}

.col-toggle {
  min-height: 32px;
  padding: 6px 14px;
  font-size: 13px;
}

.comparison-table pre {
  margin: 0;
  padding: 10px;
  border-radius: 6px;
}

.comparison-table pre code {
  overflow-wrap: normal;
  white-space: pre;
}

.preview-frame {
  display: block;
  width: 100%;
  min-height: 150px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #ffffff;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 12px 0;
  color: var(--muted);
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.status-cell {
  text-align: center;
  vertical-align: middle;
}

.status-pass,
.status-fail {
  display: inline-block;
  min-width: 28px;
  padding: 3px 7px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.2;
}

.status-pass {
  background: var(--pass-bg);
  color: var(--pass);
}

.status-fail {
  background: var(--fail-bg);
  color: var(--fail);
}

@media (max-width: 980px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 12px 18px;
  }

  .layout {
    display: block;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

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

  .content {
    padding: 30px 20px 60px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .quick-panels,
  .feature-grid,
  .cheat-grid,
  .example-pair,
  .playground-grid,
  .fe-grid,
  .lang-panels,
  .next-steps {
    grid-template-columns: 1fr;
  }
}

/* ---- Shared chrome injected by site.js ---------------------------------- */
.topnav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 700;
}

/* Pages with no table of contents render without a sidebar; center them. */
.content--full {
  margin-left: auto;
  margin-right: auto;
}

.toc a {
  padding: 4px 8px;
  font-size: 14px;
  color: var(--muted);
  border-left: 2px solid transparent;
  border-radius: 0 6px 6px 0;
}

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

.toc a.active {
  border-left-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.site-footer {
  padding: 28px 42px 48px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

/* ---- Prose lead + next steps -------------------------------------------- */
.lead {
  font-size: 18px;
  color: var(--muted);
}

.next-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}

.next-steps a.card {
  display: block;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  text-decoration: none;
  color: var(--text);
}

.next-steps a.card:hover {
  border-color: var(--accent);
}

.next-steps a.card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--accent);
}

.note-callout {
  margin: 16px 0;
  padding: 12px 16px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
}

/* ---- Language panels (Getting Started) ---------------------------------- */
.lang-panels {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 16px 0 24px;
}

.lang-panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel);
}

.lang-panel h3 {
  margin: 0;
  padding: 10px 14px;
  background: var(--panel-alt);
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}

.lang-panel pre {
  margin: 0;
  border-radius: 0;
}

.lang-panel .panel-note {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
}

/* ---- Feature reference -------------------------------------------------- */
.feature-group {
  padding-top: 12px;
}

.group-blurb {
  max-width: 760px;
  color: var(--muted);
}

.feature-entry {
  padding: 18px 0 8px;
}

.feature-entry h3 {
  margin-top: 0;
  scroll-margin-top: 78px;
}

.feature-desc {
  max-width: 760px;
  color: var(--muted);
}

.feature-example {
  margin: 12px 0 6px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  overflow: hidden;
}

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

.fe-pane {
  padding: 14px 16px;
  min-width: 0;
}

.fe-source {
  border-right: 1px solid var(--border);
  background: var(--panel-alt);
}

.fe-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.fe-source pre {
  margin: 0;
}

.fe-actions {
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  background: var(--panel-alt);
}

.fe-toggle {
  min-height: 32px;
  padding: 5px 12px;
  font-size: 13px;
}

.fe-html {
  border-top: 1px solid var(--border);
  padding: 0 16px 4px;
}

.fe-html pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

@media (max-width: 720px) {
  .fe-grid {
    grid-template-columns: 1fr;
  }
  .fe-source {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
}

/* ---- Full-page playground ----------------------------------------------- */
.content--playground {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  height: calc(100vh - 63px); /* viewport minus the sticky top bar */
  min-height: 520px;
}

.pg-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 20px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.pg-toolbar-title strong {
  font-size: 18px;
  margin-right: 10px;
}

.pg-toolbar-title span {
  color: var(--muted);
  font-size: 13px;
}

.pg-toolbar .sample-actions {
  margin: 0;
}

.pg-split {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  min-height: 0;
}

.pg-input,
.pg-output {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
}

.pg-input {
  border-right: 1px solid var(--border);
}

.pg-pane-label,
.pg-tabs {
  flex: 0 0 auto;
  border-bottom: 1px solid var(--border);
  background: var(--panel-alt);
}

.pg-pane-label {
  padding: 9px 16px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

#playground-input {
  flex: 1;
  min-height: 0;
  width: 100%;
  padding: 16px;
  border: 0;
  border-radius: 0;
  resize: none;
  background: var(--panel);
  color: var(--text);
  font: 14px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.pg-tabs {
  display: flex;
  gap: 4px;
  padding: 6px 10px;
}

.pg-tabs button {
  min-height: 30px;
  padding: 4px 14px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

.pg-tabs button.active {
  background: var(--panel);
  border-color: var(--border);
  color: var(--accent);
}

.pg-pane {
  flex: 1;
  min-height: 0;
  width: 100%;
}

#playground-preview {
  overflow: auto;
  padding: 20px;
  background: #ffffff;
}

#playground-html-pane {
  margin: 0;
  border-radius: 0;
  overflow: auto;
}

@media (max-width: 820px) {
  .content--playground {
    height: auto;
    min-height: 0;
  }
  .pg-split {
    display: block;
  }
  .pg-input {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
  #playground-input {
    min-height: 300px;
  }
  .pg-pane {
    min-height: 380px;
  }
}

/* ---- Parser support table ----------------------------------------------- */
.support-table td.yes,
.support-table td.no,
.support-table td.warn,
.support-table th:nth-child(n + 3) {
  text-align: center;
  width: 64px;
}

.support-table td.yes,
.support-table td.no,
.support-table td.warn {
  font-weight: 700;
}

.support-table td.yes {
  color: var(--pass);
}

.support-table td.no {
  color: var(--muted);
}

.support-table td.warn {
  color: #9a6b00;
}

.support-legend {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.status-unknown {
  display: inline-block;
  min-width: 28px;
  padding: 3px 7px;
  border-radius: 6px;
  background: #eef2f7;
  color: var(--muted);
  font-size: 16px;
  font-weight: 700;
}