:root {
  --bg: #fbf7f2;
  --surface: #ffffff;
  --ink: #2a1f27;
  --muted: #5e5059;
  --brand: #5b2a4e;
  --brand-ink: #ffffff;
  --accent: #b8873b;
  --line: #e8ded6;
  --link: #7a2f66;
  --radius: 14px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1519;
    --surface: #251d23;
    --ink: #f3ece8;
    --muted: #c4b6bf;
    --brand: #3e1c35;
    --line: #3a2e36;
    --link: #e6a9d4;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.85 Vazirmatn, Tahoma, "Segoe UI", system-ui, sans-serif;
}
html[lang="en"] body { line-height: 1.7; }
a { color: var(--link); text-underline-offset: 3px; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; inset-inline-start: -9999px; }
.skip:focus { inset-inline-start: 16px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 9; }

.top { background: var(--brand); color: var(--brand-ink); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.logo { display: flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; font-weight: 800; font-size: 1.25rem; }
.top nav { display: flex; gap: 18px; flex-wrap: wrap; }
.top nav a { color: inherit; text-decoration: none; opacity: .92; }
.top nav a:hover, .top nav a:focus-visible { opacity: 1; text-decoration: underline; }

.hero { background: linear-gradient(160deg, var(--brand), #2f1229); color: #fff; padding: 56px 0 64px; }
.hero h1 { font-size: clamp(1.7rem, 4.5vw, 2.6rem); line-height: 1.35; margin: 0 0 14px; max-width: 22ch; }
.hero .lead { font-size: 1.12rem; max-width: 60ch; opacity: .95; margin: 0; }
.intro { margin: 36px 0 8px; }

.sec { margin: 40px 0; }
.sec > h2 { font-size: 1.35rem; margin: 0 0 16px; padding-bottom: 8px; border-bottom: 2px solid var(--accent); display: inline-block; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.card {
  display: flex; flex-direction: column; gap: 6px; padding: 18px 20px; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); text-decoration: none;
  transition: border-color .15s, transform .15s;
}
.card:hover, .card:focus-visible { border-color: var(--link); transform: translateY(-2px); }
.card h3 { margin: 0; font-size: 1.06rem; line-height: 1.5; }
.card p { margin: 0; color: var(--muted); font-size: .94rem; line-height: 1.7; flex: 1; }
.card span { color: var(--link); font-weight: 600; font-size: .92rem; }

.article { padding-top: 24px; padding-bottom: 48px; }
.article > article { max-width: 760px; }
.crumbs { font-size: .9rem; color: var(--muted); margin-bottom: 8px; }
.crumbs a { color: var(--muted); }
.art-head h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.4; margin: 0 0 12px; }
.art-head .lead { font-size: 1.12rem; color: var(--muted); margin: 0 0 8px; }
.meta { font-size: .88rem; color: var(--muted); }
.toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 20px; margin: 24px 0; }
.toc h2 { font-size: 1rem; margin: 0 0 6px; }
.toc ol { margin: 0; padding-inline-start: 22px; }

.prose h2 { font-size: 1.4rem; line-height: 1.5; margin: 2.2em 0 .6em; scroll-margin-top: 16px; }
.prose h3 { font-size: 1.12rem; margin: 1.6em 0 .4em; }
.prose p, .prose li { max-width: 70ch; }
.prose ul, .prose ol { padding-inline-start: 24px; }
.prose li { margin: .3em 0; }
.prose blockquote, .prose .note {
  margin: 1.4em 0; padding: 12px 18px; background: var(--surface);
  border-inline-start: 4px solid var(--accent); border-radius: 8px;
}
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: .95rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 12px; text-align: start; vertical-align: top; }
.prose th { background: var(--surface); }

.faq { margin-top: 40px; }
.faq h2 { font-size: 1.35rem; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 10px 16px; margin: 10px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 8px 0 2px; }

.related { margin-top: 48px; }
.related h2 { font-size: 1.25rem; }

.foot { background: var(--surface); border-top: 1px solid var(--line); margin-top: 48px; padding: 32px 0 24px; font-size: .94rem; color: var(--muted); }
.foot-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.foot h2 { font-size: 1rem; color: var(--ink); margin: 0 0 6px; }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { margin: 4px 0; line-height: 1.6; }
.foot a { color: var(--muted); }
.small { font-size: .85rem; }
html[lang="fa"] ol { list-style-type: persian; }