/* p-track Help Center — static, responsive, and dependency-free. */

:root {
  color-scheme: dark;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-synthesis: none;
  --night: #080b11;
  --surface: #10151e;
  --surface-raised: #151c27;
  --surface-soft: #0d1219;
  --surface-hover: #1a2230;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #e8ecf3;
  --text-soft: #b9c2d4;
  --muted: #8a93a8;
  --accent: #3dd6a3;
  --accent-strong: #62e8ba;
  --accent-rgb: 61, 214, 163;
  --ink: #06231a;
  --info: #5fafff;
  --todo: #a89fff;
  --doing: #ffd75f;
  --blocked: #ff5f87;
  --done: #5fff87;
  --code-bg: #090d12;
  --topbar: rgba(8, 11, 17, 0.9);
  --body-glow:
    radial-gradient(60rem 40rem at -8% -18%, rgba(61, 214, 163, 0.09), transparent 60%),
    radial-gradient(70rem 50rem at 112% 118%, rgba(99, 102, 241, 0.07), transparent 60%);
  --shadow: 0 18px 56px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --content: 76rem;
}

:root[data-theme="light"] {
  color-scheme: light;
  --night: #f5f6f8;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --surface-soft: #f0f2f6;
  --surface-hover: #eef1f6;
  --line: rgba(15, 23, 42, 0.12);
  --line-strong: rgba(15, 23, 42, 0.22);
  --text: #1a2230;
  --text-soft: #3d4757;
  --muted: #617089;
  --accent: #0d9668;
  --accent-strong: #0a7a54;
  --accent-rgb: 13, 150, 104;
  --ink: #ffffff;
  --info: #1d6fc5;
  --todo: #6d5fd3;
  --doing: #8a5306;
  --blocked: #c52b58;
  --done: #147d3a;
  --code-bg: #eef1f6;
  --topbar: rgba(245, 246, 248, 0.92);
  --body-glow:
    radial-gradient(60rem 40rem at -8% -18%, rgba(13, 150, 104, 0.1), transparent 60%),
    radial-gradient(70rem 50rem at 112% 118%, rgba(99, 102, 241, 0.06), transparent 60%);
  --shadow: 0 18px 56px rgba(15, 23, 42, 0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    color-scheme: light;
    --night: #f5f6f8;
    --surface: #ffffff;
    --surface-raised: #ffffff;
    --surface-soft: #f0f2f6;
    --surface-hover: #eef1f6;
    --line: rgba(15, 23, 42, 0.12);
    --line-strong: rgba(15, 23, 42, 0.22);
    --text: #1a2230;
    --text-soft: #3d4757;
    --muted: #617089;
    --accent: #0d9668;
    --accent-strong: #0a7a54;
    --accent-rgb: 13, 150, 104;
    --ink: #ffffff;
    --info: #1d6fc5;
    --todo: #6d5fd3;
    --doing: #8a5306;
    --blocked: #c52b58;
    --done: #147d3a;
    --code-bg: #eef1f6;
    --topbar: rgba(245, 246, 248, 0.92);
    --body-glow:
      radial-gradient(60rem 40rem at -8% -18%, rgba(13, 150, 104, 0.1), transparent 60%),
      radial-gradient(70rem 50rem at 112% 118%, rgba(99, 102, 241, 0.06), transparent 60%);
    --shadow: 0 18px 56px rgba(15, 23, 42, 0.12);
  }
}

* {
  box-sizing: border-box;
}

html {
  min-width: 20rem;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--body-glow), var(--night);
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: var(--accent-strong);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.14em;
}

button,
input {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  color: var(--ink);
  background: var(--accent);
  border-radius: 0.5rem;
  font-weight: 750;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: var(--topbar);
  backdrop-filter: blur(18px);
}

.header-inner,
.page-shell,
.site-footer-inner {
  width: min(calc(100% - 2rem), var(--content));
  margin-inline: auto;
}

.header-inner {
  display: grid;
  gap: 0.7rem 1.25rem;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  padding-block: 0.9rem;
}

.brand {
  display: inline-flex;
  gap: 0.65rem;
  align-items: center;
  color: var(--text);
  font-weight: 800;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  color: var(--ink);
  background: linear-gradient(145deg, var(--accent-strong), var(--accent));
  border-radius: 0.55rem;
  box-shadow: 0 0 0 1px rgba(var(--accent-rgb), 0.35);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.9rem;
}

.version-badge,
.eyebrow {
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.version-badge {
  padding: 0.15rem 0.5rem;
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  border-radius: 999px;
  background: rgba(var(--accent-rgb), 0.08);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.primary-nav ul,
.card-grid,
.search-results,
.page-toc ul,
.breadcrumbs ol,
.plain-list {
  padding: 0;
  margin: 0;
  list-style: none;
}

.primary-nav ul {
  display: flex;
  gap: 0.15rem;
  justify-content: center;
  flex-wrap: wrap;
}

.primary-nav a {
  display: block;
  padding: 0.42rem 0.62rem;
  color: var(--text-soft);
  border-radius: 0.45rem;
  font-size: 0.88rem;
  font-weight: 650;
  text-decoration: none;
}

.primary-nav a:hover,
.primary-nav a[aria-current="page"] {
  color: var(--text);
  background: rgba(var(--accent-rgb), 0.11);
}

.theme-toggle {
  min-width: 2.65rem;
  min-height: 2.65rem;
  padding: 0.4rem 0.65rem;
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: 0.55rem;
  background: var(--surface);
  cursor: pointer;
}

.theme-toggle:hover {
  background: var(--surface-hover);
}

.page-shell {
  padding-block: clamp(2.5rem, 7vw, 6rem);
}

.hero {
  max-width: 54rem;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(18rem, 0.8fr) minmax(28rem, 1.2fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.home-preview {
  min-width: 0;
  margin: 0;
}

.home-preview img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.home-preview figcaption {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.hero h1,
.article h1 {
  max-width: 20ch;
  margin: 0.2rem 0 1rem;
  font-size: clamp(2.2rem, 7vw, 4.8rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.article h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
}

.lede {
  max-width: 47rem;
  margin: 0;
  color: var(--text-soft);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.release-note {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  margin-top: 1.5rem;
  padding: 0.45rem 0.7rem;
  color: var(--text-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  font-size: 0.86rem;
}

.search-panel {
  max-width: 52rem;
  margin-block: 2.5rem 3rem;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(var(--accent-rgb), 0.08), transparent 55%), var(--surface);
  box-shadow: var(--shadow);
}

.search-label {
  display: block;
  margin-bottom: 0.45rem;
  font-weight: 750;
}

.search-input {
  width: 100%;
  min-height: 3.15rem;
  padding: 0.65rem 0.85rem;
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: 0.6rem;
  background: var(--night);
}

.search-help,
.search-status,
.meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.search-help {
  margin: 0.45rem 0 0;
}

.search-status {
  min-height: 1.5rem;
  margin: 0.8rem 0 0;
}

.search-results {
  display: grid;
  gap: 0.6rem;
}

.search-results a {
  display: block;
  padding: 0.8rem;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background: var(--surface-raised);
  text-decoration: none;
}

.search-results a:hover {
  border-color: rgba(var(--accent-rgb), 0.45);
}

.search-results span {
  display: block;
  margin-top: 0.1rem;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.section-heading {
  margin: 3.5rem 0 1.2rem;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  display: block;
  height: 100%;
  min-height: 12rem;
  padding: 1.2rem;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(var(--accent-rgb), 0.045), transparent 45%), var(--surface);
  text-decoration: none;
}

.card:hover {
  border-color: rgba(var(--accent-rgb), 0.42);
  background-color: var(--surface-hover);
  transform: translateY(-2px);
}

.card-kicker {
  color: var(--accent-strong);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
}

.card h3 {
  margin: 0.65rem 0 0.35rem;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--text-soft);
}

.package-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
  gap: 0.9rem;
  margin-block: 1rem 1.5rem;
}

.package {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1rem 1.1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(var(--accent-rgb), 0.045), transparent 45%), var(--surface);
}

.package.recommended {
  border-color: rgba(var(--accent-rgb), 0.45);
  background: linear-gradient(160deg, rgba(var(--accent-rgb), 0.11), transparent 55%), var(--surface);
}

.package-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.article .package-head h4 {
  margin: 0;
  color: var(--text);
  font-size: 1.02rem;
}

.package-badge {
  padding: 0.14rem 0.55rem;
  color: var(--ink);
  border-radius: 999px;
  background: var(--accent);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

.package-file {
  display: block;
  padding: 0.4rem 0.55rem;
  color: var(--accent-strong);
  font-size: 0.78rem;
  overflow-wrap: anywhere;
}

.article .package p {
  margin: 0;
  font-size: 0.93rem;
}

.package-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: auto 0 0;
  padding: 0.2rem 0 0;
  list-style: none;
}

.article .package-facts li {
  margin: 0;
  padding: 0.1rem 0.55rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.75rem;
}

.breadcrumbs {
  margin-bottom: 1.5rem;
}

.breadcrumbs ol {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumbs li:not(:last-child)::after {
  margin-left: 0.35rem;
  content: "/";
  color: var(--muted);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 16rem;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.article {
  min-width: 0;
  max-width: 50rem;
}

.article h2 {
  margin: 3rem 0 0.7rem;
  padding-top: 0.7rem;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.article h3 {
  margin: 2rem 0 0.5rem;
  font-size: 1.18rem;
}

.article p,
.article li {
  color: var(--text-soft);
}

.article strong {
  color: var(--text);
}

.article img {
  display: block;
  width: 100%;
  height: auto;
  margin-block: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.screenshot-pair {
  margin: 2rem 0;
}

.screenshot-pair img {
  margin-block: 0;
}

.screenshot-pair .screenshot-light {
  display: none;
}

:root[data-theme="light"] .screenshot-pair .screenshot-dark {
  display: none;
}

:root[data-theme="light"] .screenshot-pair .screenshot-light {
  display: block;
}

.screenshot-pair figcaption {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.86rem;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) .screenshot-pair .screenshot-dark {
    display: none;
  }

  :root:not([data-theme]) .screenshot-pair .screenshot-light {
    display: block;
  }
}

.page-toc {
  position: sticky;
  top: 7.5rem;
  padding: 1rem;
  border-left: 1px solid var(--line);
}

.page-toc strong {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.85rem;
}

.page-toc a {
  display: block;
  padding-block: 0.28rem;
  color: var(--muted);
  font-size: 0.88rem;
  text-decoration: none;
}

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

.callout {
  margin-block: 1.5rem;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  border-left: 0.3rem solid var(--accent);
  border-radius: 0.45rem;
  background: rgba(var(--accent-rgb), 0.07);
}

.callout.warning {
  border-color: color-mix(in srgb, var(--doing) 45%, transparent);
  border-left-color: var(--doing);
  background: color-mix(in srgb, var(--doing) 8%, transparent);
}

.callout.danger {
  border-color: color-mix(in srgb, var(--blocked) 45%, transparent);
  border-left-color: var(--blocked);
  background: color-mix(in srgb, var(--blocked) 8%, transparent);
}

.callout > :first-child {
  margin-top: 0;
}

.callout > :last-child {
  margin-bottom: 0;
}

pre,
code,
kbd {
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

code,
kbd {
  padding: 0.12rem 0.32rem;
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  background: var(--code-bg);
  font-size: 0.88em;
}

kbd {
  color: var(--text);
  border-bottom-width: 2px;
}

pre {
  max-width: 100%;
  padding: 1rem;
  overflow-x: auto;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: var(--code-bg);
  line-height: 1.55;
}

pre code {
  padding: 0;
  border: 0;
  background: transparent;
}

.table-wrap {
  max-width: 100%;
  margin-block: 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--text);
  background: var(--surface-soft);
}

td {
  color: var(--text-soft);
}

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

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: var(--surface-soft);
}

.site-footer-inner {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  padding-block: 1.5rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 68rem) {
  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .primary-nav {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .primary-nav ul {
    justify-content: flex-start;
  }

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

  .home-hero {
    grid-template-columns: 1fr;
  }

  .home-preview {
    max-width: 54rem;
  }
}

@media (max-width: 48rem) {
  .site-header {
    position: static;
  }

  .header-inner,
  .page-shell,
  .site-footer-inner {
    width: min(calc(100% - 1.25rem), var(--content));
  }

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

  .primary-nav a {
    padding: 0.5rem;
  }

  .card-grid,
  .article-layout {
    grid-template-columns: 1fr;
  }

  .page-toc {
    position: static;
    grid-row: 1;
    border-left: 0;
    border-bottom: 1px solid var(--line);
    background: var(--surface-soft);
  }

  .site-footer-inner {
    display: grid;
  }
}

@media (max-width: 30rem) {
  .version-badge {
    display: none;
  }

  .primary-nav ul,
  .card-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  :root {
    color-scheme: light;
  }

  .site-header,
  .page-toc,
  .theme-toggle,
  .search-panel,
  .skip-link {
    display: none;
  }

  body {
    color: #111827;
    background: #ffffff;
  }

  .page-shell {
    width: 100%;
    padding: 0;
  }

  .article {
    max-width: none;
  }

  a {
    color: #065f46;
  }
}