:root {
  --bg: #F7F6F2;
  --surface: #FFFFFF;
  --surface-2: #EFEDE6;
  --ink: #16181D;
  --ink-2: #4B4F58;
  --ink-3: #80848D;
  --line: #E1DED5;
  --accent: #0B6BCB;
  --accent-soft: #DCEBFA;
  --code-bg: #14161B;
  --code-ink: #E6E8EE;
  --ok: #1E8E4E;
  --warn: #B26A00;
  --no: #C2362F;
  --radius: 14px;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'IBM Plex Sans Arabic', 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0F1115; --surface: #171A20; --surface-2: #1E222A; --ink: #ECEEF2; --ink-2: #B3B8C2;
    --ink-3: #7D838F; --line: #2A2F38; --accent: #5AA9F5; --accent-soft: #15283D; --code-bg: #0B0D11;
    --ok: #4CC07D; --warn: #E0A23A; --no: #F07069; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0F1115; --surface: #171A20; --surface-2: #1E222A; --ink: #ECEEF2; --ink-2: #B3B8C2;
  --ink-3: #7D838F; --line: #2A2F38; --accent: #5AA9F5; --accent-soft: #15283D; --code-bg: #0B0D11;
  --ok: #4CC07D; --warn: #E0A23A; --no: #F07069; color-scheme: dark;
}

/* Language: every translated piece has lang="ar" and lang="en" twins. */
html[data-lang="ar"] body [lang="en"],
html[data-lang="en"] body [lang="ar"] { display: none !important; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.75 var(--sans); -webkit-font-smoothing: antialiased;
}
html[data-lang="en"] body { line-height: 1.65; }
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: var(--mono); }
:not(pre) > code {
  font-size: .86em; background: var(--surface-2); border: 1px solid var(--line);
  padding: .05em .4em; border-radius: 6px; direction: ltr; unicode-bidi: isolate; overflow-wrap: anywhere;
}
td :not(pre) > code, td > code { white-space: nowrap; overflow-wrap: normal; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* Code blocks */
.code { position: relative; direction: ltr; text-align: left; min-width: 0; }
.grid > *, .two > *, .stack > * { min-width: 0; }
.code pre {
  margin: 0; background: var(--code-bg); color: var(--code-ink); padding: 18px 20px; border-radius: var(--radius);
  overflow-x: auto; font-size: 13.5px; line-height: 1.65; tab-size: 2;
}
.code .label {
  position: absolute; top: 0; left: 16px; translate: 0 -50%; font: 600 11px var(--mono);
  background: var(--surface); color: var(--ink-2); border: 1px solid var(--line); padding: 1px 8px; border-radius: 6px;
}
.code .copy {
  position: absolute; top: 10px; right: 10px; border: 0; cursor: pointer;
  background: rgba(255,255,255,.08); color: #C9CDD6; font: 600 11.5px var(--sans); padding: 4px 9px; border-radius: 6px;
  opacity: 0; transition: opacity .15s;
}
.code:hover .copy, .code .copy:focus-visible { opacity: 1; }
@media (hover: none) { .code .copy { opacity: 1; } }
.token.comment { color: #6B7280; font-style: italic; }
.token.string, .token.attr-value { color: #9ECE6A; }
.token.keyword, .token.boolean { color: #FF9E64; }
.token.class-name, .token.builtin { color: #7DCFFF; }
.token.metadata, .token.annotation, .token.function { color: #BB9AF7; }
.token.number { color: #F7768E; }
.token.key, .token.atrule { color: #7DCFFF; }
.token.punctuation, .token.operator { color: #A9B1D6; }

/* Nav */
header.nav {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
header.nav .wrap { display: flex; align-items: center; gap: 14px; height: 60px; }
.brand { font-family: var(--mono); font-weight: 600; font-size: 15px; color: var(--ink); direction: ltr; white-space: nowrap; }
.brand span { color: var(--accent); }
.brand:hover { text-decoration: none; }
.pages { display: flex; gap: 4px; margin-inline-start: auto; }
.pages a { color: var(--ink-2); padding: 6px 12px; border-radius: 8px; font-size: 14.5px; font-weight: 500; white-space: nowrap; }
.pages a:hover { color: var(--ink); background: var(--surface); text-decoration: none; }
.pages a[aria-current="page"] { color: var(--ink); background: var(--surface); box-shadow: inset 0 0 0 1px var(--line); }
.tools { display: flex; gap: 6px; }
.tool {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-2); border-radius: 8px;
  height: 34px; min-width: 34px; padding: 0 9px; cursor: pointer; font: 600 13px var(--sans);
}
.tool:hover { color: var(--ink); border-color: var(--ink-3); }
@media (max-width: 720px) {
  header.nav .wrap { flex-wrap: wrap; height: auto; padding-top: 10px; padding-bottom: 10px; row-gap: 8px; }
  .tools { margin-inline-start: auto; }
  .pages { order: 3; width: 100%; margin: 0; overflow-x: auto; }
  .brand { font-size: 13.5px; }
}

/* Page head */
.page-head { padding: 56px 0 40px; }
.eyebrow { font-size: 13.5px; font-weight: 600; color: var(--accent); letter-spacing: .02em; }
h1 { font-size: clamp(30px, 4.6vw, 48px); line-height: 1.25; margin: 10px 0 16px; font-weight: 700; letter-spacing: -.01em; }
.lead { font-size: 18px; color: var(--ink-2); margin: 0; max-width: 40em; }

section { padding: 56px 0; border-top: 1px solid var(--line); }
h2 { font-size: clamp(23px, 3vw, 30px); margin: 0 0 8px; line-height: 1.35; }
h3 { font-size: 18px; margin: 0 0 6px; line-height: 1.45; }
h4 { font-size: 15px; margin: 0 0 4px; }
.sub { color: var(--ink-2); margin: 0 0 28px; max-width: 48em; }
p { margin: 0 0 12px; }
.muted { color: var(--ink-2); }
.small { font-size: 14.5px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 11px 18px; border-radius: 10px; font-weight: 600; font-size: 15px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
}
.btn:hover { text-decoration: none; border-color: var(--ink-3); }
.btn.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card p:last-child { margin-bottom: 0; }
.grid { display: grid; gap: 14px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 900px) { .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .g2, .g3 { grid-template-columns: minmax(0, 1fr); } }
.two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; align-items: start; }
@media (max-width: 860px) { .two { grid-template-columns: minmax(0, 1fr); } }

.tag { display: inline-block; font: 500 12px var(--sans); padding: 2px 9px; border-radius: 999px; background: var(--surface-2); color: var(--ink-2); margin: 2px 0; }
.tag.code { font-family: var(--mono); font-size: 11.5px; direction: ltr; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
th, td { padding: 11px 16px; text-align: start; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; color: var(--ink-3); font-weight: 600; background: var(--surface-2); }
tr:last-child td { border-bottom: 0; }
td.c, th.c { text-align: center; white-space: nowrap; }
.ok { color: var(--ok); font-weight: 600; }
.warn { color: var(--warn); font-weight: 600; }
.no { color: var(--no); font-weight: 600; }

.note { border-inline-start: 3px solid var(--accent); background: var(--accent-soft); padding: 12px 16px; border-radius: 0 10px 10px 0; font-size: 14.5px; }
html[dir="rtl"] .note { border-radius: 10px 0 0 10px; }
.note.warn-note { border-color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent); }

/* Steps */
.steps { display: grid; gap: 34px; counter-reset: step; }
.step { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 28px; align-items: start; }
.step > .txt::before {
  counter-increment: step; content: counter(step);
  display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: 14px; margin-bottom: 8px;
}
.step .txt p, .step .txt li { color: var(--ink-2); font-size: 15px; }
.step .txt ul { margin: 6px 0 0; padding-inline-start: 20px; }
.step .stack { display: grid; gap: 16px; min-width: 0; }
@media (max-width: 860px) { .step { grid-template-columns: minmax(0, 1fr); gap: 12px; } }

.footer { border-top: 1px solid var(--line); padding: 34px 0 56px; color: var(--ink-3); font-size: 14px; }
.footer .wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; }

.next { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 8px; }

/* Walkthrough player */
.wt-wrap { margin: 0 0 48px; }
#walkthrough { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 14px; display: grid; gap: 12px; }
.wt-stage {
  height: clamp(320px, 42vw, 430px); border-radius: 12px; overflow: hidden; display: grid; place-items: center; padding: 18px;
  background: radial-gradient(120% 120% at 0% 0%, #2A3350 0%, #161A26 55%, #10131B 100%);
}
@media (max-width: 640px) { .wt-stage { height: 400px; padding: 10px; } }
.wt-window {
  width: 100%; height: 100%; max-width: 860px; display: grid; grid-template-rows: auto 1fr; border-radius: 10px; overflow: hidden;
  background: #0D0F14; box-shadow: 0 20px 50px -20px rgba(0,0,0,.6), inset 0 0 0 1px rgba(255,255,255,.06); direction: ltr; text-align: left;
}
.wt-bar { display: flex; align-items: center; gap: 6px; padding: 9px 12px; background: #1A1D25; }
.wt-bar i { width: 10px; height: 10px; border-radius: 50%; background: #3A3F4B; }
.wt-bar i:nth-child(1) { background: #FF5F57; } .wt-bar i:nth-child(2) { background: #FEBC2E; } .wt-bar i:nth-child(3) { background: #28C840; }
.wt-file { margin-left: 10px; font: 600 12px var(--mono); color: #9AA3B5; }
.wt-body { position: relative; min-height: 0; overflow: hidden; display: grid; }
.wt-body.term { grid-template-columns: minmax(0, 1fr) auto; }
.wt-term, .wt-code { margin: 0; padding: 16px 18px; font: 13px/1.7 var(--mono); color: #D6DAE3; overflow: hidden; white-space: pre-wrap; word-break: break-word; background: none; }
.wt-code { white-space: pre; font-size: 12.5px; overflow: auto; }
@media (max-width: 640px) { .wt-term, .wt-code { font-size: 10.5px; padding: 12px; } }
.wt-line.cmd { color: #fff; margin-top: 6px; } .wt-line.cmd:first-child { margin-top: 0; }
.wt-line .p { color: #28C840; }
.wt-line.add { color: #9ECE6A; } .wt-line.ok { color: #7DCFFF; }
.wt-line .cur { display: inline-block; width: 8px; height: 1.1em; vertical-align: text-bottom; background: #D6DAE3; animation: wt-blink 1s steps(1) infinite; }
@keyframes wt-blink { 50% { opacity: 0; } }
.wt-tree {
  align-self: start; margin: 16px; padding: 12px 14px; border-radius: 8px; background: #161A22; border: 1px solid #262B36;
  font: 12.5px/1.8 var(--mono); color: #9AA3B5; white-space: pre; opacity: 0; transform: translateY(6px); transition: .4s;
}
.wt-tree.show { opacity: 1; transform: none; }
.wt-tree .new { color: #fff; } .wt-tree em { font-style: normal; font-size: 10px; color: #0D0F14; background: #7DCFFF; padding: 0 5px; border-radius: 4px; margin-left: 6px; }
@media (max-width: 640px) { .wt-body.term { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto auto; } .wt-tree { margin: 0 12px 12px; } }
.wt-mark { display: inline-block; background: rgba(125, 207, 255, .14); box-shadow: -6px 0 0 rgba(125, 207, 255, .14), 6px 0 0 rgba(125, 207, 255, .14); border-radius: 3px; }
.wt-body.video { place-items: center; background: #0D0F14; }
.wt-body.video video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; display: block; }
.wt-caption { display: flex; gap: 12px; align-items: flex-start; padding: 2px 4px; min-height: 64px; }
.wt-step { flex: none; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; }
.wt-title { display: block; font-size: 16px; }
.wt-text { margin: 2px 0 0; color: var(--ink-2); font-size: 14.5px; }
.wt-controls { display: flex; gap: 10px; align-items: stretch; }
.wt-play { flex: none; width: 42px; border-radius: 10px; border: 1px solid var(--line); background: var(--ink); color: var(--bg); font-size: 13px; cursor: pointer; }
.wt-chapters { flex: 1; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 6px; }
.wt-ch {
  position: relative; overflow: hidden; display: flex; align-items: center; gap: 6px; padding: 7px 9px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--surface-2); color: var(--ink-2); font: 500 12.5px var(--sans); cursor: pointer; text-align: start;
}
.wt-ch .wt-fill { position: absolute; inset: auto 0 0 0; height: 3px; background: var(--accent); transform-origin: left; transform: scaleX(var(--p, 0)); }
html[dir="rtl"] .wt-ch .wt-fill { transform-origin: right; }
.wt-ch.done .wt-fill { transform: scaleX(1); opacity: .45; }
.wt-ch.on { color: var(--ink); border-color: var(--accent); background: var(--surface); }
.wt-n { font-weight: 700; font-family: var(--mono); }
.wt-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
@media (max-width: 760px) { .wt-name { display: none; } .wt-ch { justify-content: center; } }
@media (max-width: 640px) { .wt-code { font-size: 9.5px; } .wt-term { font-size: 10.5px; } }