:root {
  --ink: #1c2333;
  --dim: #5b6472;
  --line: #e6e8ef;
  --bg: #ffffff;
  --soft: #f5f6fb;
  --indigo: #2E4374;
  --teal: #137C6C;
  --amber: #9E6B15;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Vazirmatn, Tahoma, system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  direction: rtl;
  line-height: 2.05;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--indigo); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

/* header */
.site-head {
  background: linear-gradient(135deg, var(--indigo), #243a66);
  color: #fff;
}
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; padding-block: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: #fff; }
.brand .logo { width: 30px; height: 30px; }
.site-head nav a { color: #dfe6f6; font-weight: 600; font-size: 14px; margin-inline-start: 16px; }
.site-head nav a:hover { color: #fff; }

/* article */
.post { padding-block: 34px 56px; }
.eyebrow { color: var(--teal); font-weight: 700; font-size: 13px; letter-spacing: .04em; }
h1 { font-size: clamp(26px, 5vw, 38px); line-height: 1.28; margin: 8px 0 6px; font-weight: 800; }
.meta { color: var(--dim); font-size: 13px; margin-bottom: 22px; }
.post h2 { font-size: clamp(20px, 4vw, 26px); margin: 34px 0 10px; font-weight: 800; line-height: 1.4; }
.post h3 { font-size: 18px; margin: 24px 0 8px; font-weight: 700; }
.post p, .post li { font-size: 17px; color: #23324a; }
.post ul, .post ol { padding-inline-start: 22px; }
.post li { margin: 6px 0; }
.lead { font-size: 19px; color: var(--dim); }
.callout {
  background: var(--soft);
  border: 1px solid var(--line);
  border-inline-start: 4px solid var(--teal);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 22px 0;
}
.callout strong { color: var(--teal); }
table.tbl { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 10px 12px; text-align: right; }
.tbl th { background: var(--soft); font-weight: 700; }
.cta {
  display: block;
  background: linear-gradient(135deg, var(--indigo), #34518c);
  color: #fff;
  border-radius: 16px;
  padding: 22px;
  margin: 34px 0 8px;
  text-align: center;
}
.cta h3 { color: #fff; margin: 0 0 6px; font-size: 20px; }
.cta p { color: #cfd8ef; margin: 0 0 14px; font-size: 15px; }
.btn {
  display: inline-block;
  background: #fff; color: var(--indigo);
  font-weight: 800; padding: 11px 24px; border-radius: 999px;
}
.btn:hover { text-decoration: none; opacity: .93; }

/* index cards */
.hero { padding-block: 40px 20px; }
.hero h1 { font-size: clamp(28px, 6vw, 40px); }
.cards { display: grid; gap: 16px; padding-bottom: 48px; }
.card {
  border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px;
  transition: box-shadow .2s, transform .2s; background: #fff;
}
.card:hover { box-shadow: 0 10px 30px rgba(20,25,45,.08); transform: translateY(-2px); }
.card h2 { margin: 0 0 6px; font-size: 20px; }
.card h2 a { color: var(--ink); }
.card p { margin: 0; color: var(--dim); font-size: 15px; }
.card .tag { color: var(--teal); font-weight: 700; font-size: 12px; }

/* footer */
.site-foot { border-top: 1px solid var(--line); background: var(--soft); }
.site-foot .wrap { padding-block: 24px; color: var(--dim); font-size: 14px; display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
.site-foot a { color: var(--dim); }
.crumbs { font-size: 13px; color: var(--dim); padding-top: 18px; }