@font-face {
  font-family: Vazirmatn;
  src: url("../fonts/Vazirmatn.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vazir Code";
  src: url("../fonts/VazirCode.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --accent: #ff5c00;
  --accent-strong: #e04f00;
  --accent-soft: rgb(255 92 0 / 10%);
  --bg: #fff;
  --bg-alt: #f7f6f3;
  --surface: #fff;
  --text: #1b1a19;
  --muted: #5e5a55;
  --border: #e6e2dc;
  --code-bg: #16181d;
  --code-text: #e6e6e6;
  --code-border: #2a2d35;
  --tok-k: #ff8a3d;
  --tok-t: #6cc6ff;
  --tok-b: #c792ea;
  --tok-f: #ffd580;
  --tok-s: #a5d68a;
  --tok-n: #f78c6c;
  --tok-c: #7d8290;
  --shadow: 0 1px 2px rgb(0 0 0 / 4%), 0 8px 24px rgb(0 0 0 / 6%);
  --radius: 14px;
  --max: 1120px;
  --font: "Vazirmatn", system-ui, -apple-system, "Segoe UI", Tahoma, sans-serif;
  --font-code: "Vazir Code", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111214;
    --bg-alt: #17181b;
    --surface: #1b1c20;
    --text: #efedea;
    --muted: #a8a39c;
    --border: #2b2c31;
    --accent-soft: rgb(255 92 0 / 14%);
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 35%);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #111214;
  --bg-alt: #17181b;
  --surface: #1b1c20;
  --text: #efedea;
  --muted: #a8a39c;
  --border: #2b2c31;
  --accent-soft: rgb(255 92 0 / 14%);
  --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 35%);
  color-scheme: dark;
}

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

html {
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.9;
  text-rendering: optimizeLegibility;
}

:lang(en) body,
body:lang(en) {
  line-height: 1.7;
}

img,
svg {
  display: block;
  max-inline-size: 100%;
}

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

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

h1,
h2,
h3 {
  line-height: 1.35;
  margin-block: 0 0.6em;
  font-weight: 800;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
}

h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
}

h3 {
  font-size: 1.2rem;
  font-weight: 700;
}

p {
  margin-block: 0 1em;
}

code {
  font-family: var(--font-code);
  font-size: 0.9em;
  background: var(--accent-soft);
  color: var(--text);
  padding-block: 0.1em;
  padding-inline: 0.4em;
  border-radius: 6px;
  unicode-bidi: plaintext;
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  inset-block-start: -3rem;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  z-index: 100;
}

.skip-link:focus {
  inset-block-start: 1rem;
}

.container {
  inline-size: 100%;
  max-inline-size: var(--max);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-block-end: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-block-size: 4rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 800;
  font-size: 1.2rem;
}

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

.brand img {
  inline-size: 2rem;
  block-size: 2rem;
}

.site-nav {
  margin-inline-start: auto;
}

.site-nav ul {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  padding: 0.4rem 0.8rem;
  border-radius: 10px;
  color: var(--muted);
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--text);
  background: var(--bg-alt);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--accent-strong);
  background: var(--accent-soft);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.icon-button svg {
  inline-size: 1.15rem;
  block-size: 1.15rem;
}

.theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: block;
  }

  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: none;
  }
}

.nav-toggle {
  display: none;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.3rem;
  border-radius: 12px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    background 0.15s ease,
    border-color 0.15s ease;
}

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

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

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

.button-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

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

.button-small {
  padding: 0.45rem 0.9rem;
  font-size: 0.95rem;
}

.hero {
  padding-block: clamp(3rem, 8vw, 6rem);
  background:
    radial-gradient(60rem 30rem at 85% -10%, var(--accent-soft), transparent 70%),
    var(--bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.eyebrow {
  display: inline-block;
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 700;
  font-size: 0.9rem;
  margin-block-end: 1rem;
}

.hero h1 .accent {
  color: var(--accent);
}

.lead {
  font-size: 1.2rem;
  color: var(--muted);
  max-inline-size: 38rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-block-start: 1.75rem;
}

.meta-line {
  margin-block-start: 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.section-flush {
  padding-block-start: 0;
}

.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

.section-head {
  max-inline-size: 44rem;
  margin-block-end: 2.5rem;
}

.section-head p {
  color: var(--muted);
  font-size: 1.1rem;
}

.grid {
  display: grid;
  gap: 1.25rem;
}

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

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

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

.card-icon {
  display: inline-grid;
  place-items: center;
  inline-size: 2.75rem;
  block-size: 2.75rem;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 1.35rem;
  margin-block-end: 1rem;
}

.card a {
  font-weight: 700;
}

.code-window {
  background: var(--code-bg);
  color: var(--code-text);
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  min-inline-size: 0;
}

.code-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-block-end: 1px solid var(--code-border);
  font-size: 0.85rem;
  color: #a0a4ae;
}

.code-bar .dots {
  display: flex;
  gap: 0.35rem;
}

.code-bar .dots span {
  inline-size: 0.7rem;
  block-size: 0.7rem;
  border-radius: 50%;
  background: #3a3d46;
}

.code-bar .file {
  font-family: var(--font-code);
}

.copy-button {
  margin-inline-start: auto;
  background: transparent;
  border: 1px solid var(--code-border);
  color: #c6c9d1;
  border-radius: 8px;
  padding: 0.15rem 0.6rem;
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
}

.copy-button:hover {
  border-color: var(--accent);
  color: #fff;
}

pre.code {
  margin: 0;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  font-family: var(--font-code);
  font-size: 0.95rem;
  line-height: 1.75;
  tab-size: 4;
}

pre.code code {
  background: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
  unicode-bidi: normal;
  white-space: inherit;
}

.code-output {
  border-block-start: 1px dashed var(--code-border);
  padding: 0.8rem 1.25rem 1rem;
  font-family: var(--font-code);
  font-size: 0.9rem;
  color: #c6c9d1;
  white-space: pre-wrap;
  unicode-bidi: plaintext;
}

.code-output[dir="rtl"] {
  text-align: right;
}

.code-output[dir="ltr"] {
  text-align: left;
}

.code-output .label {
  display: block;
  font-family: var(--font);
  font-size: 0.8rem;
  color: #8a8f9a;
  margin-block-end: 0.25rem;
}

.tok-k {
  color: var(--tok-k);
  font-weight: 700;
}

.tok-t {
  color: var(--tok-t);
}

.tok-b {
  color: var(--tok-b);
}

.tok-f {
  color: var(--tok-f);
}

.tok-s {
  color: var(--tok-s);
}

.tok-n {
  color: var(--tok-n);
}

.tok-c {
  color: var(--tok-c);
  font-style: italic;
}

.twin {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  align-items: start;
}

.twin-label {
  display: block;
  font-weight: 700;
  margin-block-end: 0.6rem;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.step {
  counter-increment: step;
  position: relative;
}

.step::before {
  content: counter(step);
  display: inline-grid;
  place-items: center;
  inline-size: 2.25rem;
  block-size: 2.25rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  margin-block-end: 0.9rem;
}

.cmd {
  display: block;
  direction: ltr;
  text-align: start;
  unicode-bidi: isolate;
  margin-block-start: 0.75rem;
  padding: 0.7rem 0.9rem;
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: 10px;
  font-family: var(--font-code);
  font-size: 0.88rem;
  overflow-x: auto;
  white-space: pre;
}

.page-head {
  padding-block: clamp(2.5rem, 6vw, 4rem) 1rem;
}

.page-head p {
  color: var(--muted);
  font-size: 1.15rem;
  max-inline-size: 44rem;
}

.doc {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
  padding-block-end: 4rem;
}

.toc {
  position: sticky;
  inset-block-start: 5.5rem;
  border-inline-start: 2px solid var(--border);
  padding-inline-start: 1rem;
}

.toc strong {
  display: block;
  margin-block-end: 0.5rem;
}

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

.toc a {
  display: block;
  color: var(--muted);
  padding-block: 0.2rem;
}

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

.lesson {
  scroll-margin-block-start: 5.5rem;
  margin-block-end: 3.5rem;
}

.lesson > p {
  max-inline-size: 46rem;
}

.note {
  border-inline-start: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 1rem 1.25rem;
  border-radius: 10px;
  margin-block: 1.5rem;
}

.note p:last-child {
  margin: 0;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

table {
  border-collapse: collapse;
  inline-size: 100%;
}

th,
td {
  text-align: start;
  padding: 0.75rem 1rem;
  border-block-end: 1px solid var(--border);
  vertical-align: top;
}

tr:last-child td {
  border-block-end: 0;
}

th {
  background: var(--bg-alt);
  font-weight: 700;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.chips li {
  unicode-bidi: plaintext;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
}

.cta {
  text-align: center;
  background: var(--code-bg);
  color: #fff;
  border-radius: calc(var(--radius) * 1.5);
  padding: clamp(2rem, 6vw, 3.5rem);
  box-shadow: var(--shadow);
}

.cta p {
  color: #c6c9d1;
  max-inline-size: 36rem;
  margin-inline: auto;
}

.cta .actions {
  justify-content: center;
}

.cta .button-ghost {
  background: transparent;
  color: #fff;
  border-color: #3a3d46;
}

.site-footer {
  border-block-start: 1px solid var(--border);
  background: var(--bg-alt);
  padding-block: 3rem 2rem;
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 2rem;
}

.footer-grid h4 {
  margin-block: 0 0.75rem;
  font-size: 1rem;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-grid li {
  margin-block-end: 0.35rem;
}

.footer-grid a {
  color: var(--muted);
}

.footer-grid a:hover {
  color: var(--accent-strong);
}

.footer-about p {
  color: var(--muted);
  max-inline-size: 22rem;
}

.footer-bottom {
  margin-block-start: 2.5rem;
  padding-block-start: 1.5rem;
  border-block-start: 1px solid var(--border);
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

.not-found {
  text-align: center;
  padding-block: clamp(4rem, 12vw, 8rem);
}

.not-found .big {
  font-size: clamp(4rem, 14vw, 8rem);
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-block-end: 1rem;
}

.not-found .lead {
  margin-inline: auto;
}

.not-found .actions {
  justify-content: center;
}

@media (max-width: 960px) {
  .hero-grid,
  .twin,
  .doc {
    grid-template-columns: minmax(0, 1fr);
  }

  .grid-3,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .toc {
    position: static;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-grid;
  }

  .site-nav {
    display: none;
    position: absolute;
    inset-inline: 0;
    inset-block-start: 100%;
    background: var(--bg);
    border-block-end: 1px solid var(--border);
    padding: 0.75rem 1.25rem 1.25rem;
    margin: 0;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
  }

  .header-actions {
    margin-inline-start: auto;
  }

  .header-actions .button {
    display: none;
  }

  .grid-3,
  .grid-2,
  .steps,
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }

  .button:hover {
    transform: none;
  }
}