/* ===== فردا سیستم — استایل مشترک وبلاگ و مقالات ===== */
:root{
  --font:'Vazirmatn', system-ui, -apple-system, 'Segoe UI', Tahoma, sans-serif;
  --bg:#070b14; --bg-2:#0b1120; --surface-solid:#121a2b; --card:rgba(20,29,48,.6);
  --mock-head:#0a1120; --line:rgba(148,170,210,.12); --line-strong:rgba(148,170,210,.22);
  --text:#eef2fb; --muted:#9aa8c6; --faint:#64769c;
  --brand:#10b981; --brand-2:#14c9a6; --brand-ink:#04120d; --brand-glow:rgba(16,185,129,.35);
  --accent:#f5b544; --accent-soft:rgba(245,181,68,.14);
  --radius:22px; --radius-sm:14px; --radius-lg:30px;
  --shadow-sm:0 2px 8px rgba(0,0,0,.25);
  --shadow:0 18px 50px -18px rgba(0,0,0,.6), 0 6px 18px -8px rgba(0,0,0,.45);
  --shadow-brand:0 20px 60px -20px var(--brand-glow);
  --nav-bg:rgba(9,14,24,.62);
  --mesh-1:rgba(16,185,129,.16); --mesh-2:rgba(37,99,235,.16); --mesh-3:rgba(245,181,68,.10);
}
:root[data-theme="light"]{
  --bg:#f5f8fe; --bg-2:#eef3fb; --surface-solid:#ffffff; --card:rgba(255,255,255,.8);
  --mock-head:#e9f0fa; --line:rgba(16,34,74,.1); --line-strong:rgba(16,34,74,.16);
  --text:#0c1830; --muted:#4a5a7a; --faint:#7585a5;
  --brand:#0e9f73; --brand-2:#10b981; --brand-ink:#ffffff; --brand-glow:rgba(16,185,129,.3);
  --accent:#c98a15; --accent-soft:rgba(201,138,21,.12);
  --shadow-sm:0 2px 8px rgba(16,34,74,.08);
  --shadow:0 20px 50px -20px rgba(16,34,74,.22), 0 6px 16px -10px rgba(16,34,74,.14);
  --shadow-brand:0 24px 60px -24px var(--brand-glow);
  --nav-bg:rgba(255,255,255,.7);
  --mesh-1:rgba(16,185,129,.14); --mesh-2:rgba(37,99,235,.12); --mesh-3:rgba(245,181,68,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:2;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(60vw 50vh at 85% -5%,var(--mesh-2),transparent 60%),radial-gradient(55vw 55vh at 10% 10%,var(--mesh-1),transparent 60%),radial-gradient(40vw 40vh at 60% 100%,var(--mesh-3),transparent 65%)}
a{color:inherit;text-decoration:none}
img{max-width:100%}
h1,h2,h3,h4{line-height:1.4;margin:0;letter-spacing:-.01em}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:8px}
.wrap{max-width:1180px;margin-inline:auto;padding-inline:24px}
.num{font-variant-numeric:tabular-nums}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:22px;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.18rem}
.brand .logo{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(140deg,var(--brand),var(--brand-2));color:var(--brand-ink);box-shadow:var(--shadow-brand);flex:none}
.brand small{color:var(--muted);font-weight:500;font-size:.72rem}
.nav-links{display:flex;gap:4px;margin-inline-start:14px}
.nav-links a{padding:9px 14px;border-radius:12px;color:var(--muted);font-weight:500;font-size:.95rem;transition:.2s}
.nav-links a:hover{color:var(--text);background:var(--card)}
.nav-right{margin-inline-start:auto;display:flex;align-items:center;gap:10px}
.icon-btn{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--text);display:grid;place-items:center;transition:.2s}
.icon-btn:hover{border-color:var(--line-strong);transform:translateY(-1px)}
.btn{display:inline-flex;align-items:center;gap:8px;border:none;border-radius:14px;padding:12px 20px;font-weight:700;font-size:.97rem;transition:.22s;white-space:nowrap;cursor:pointer;font-family:inherit}
.btn-primary{background:linear-gradient(140deg,var(--brand),var(--brand-2));color:var(--brand-ink);box-shadow:var(--shadow-brand)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06)}
.btn-ghost{background:var(--card);color:var(--text);border:1px solid var(--line-strong)}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--brand)}
.btn-lg{padding:16px 30px;font-size:1.05rem;border-radius:16px}

/* breadcrumb */
.crumb{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.86rem;padding:26px 0 0}
.crumb a:hover{color:var(--brand)}
.crumb svg{opacity:.5}

/* article header */
.art-head{padding:26px 0 10px;max-width:760px}
.art-head .cat{display:inline-block;color:var(--brand);font-weight:700;font-size:.85rem;margin-bottom:14px}
.art-head h1{font-size:clamp(1.8rem,4vw,2.7rem);font-weight:900;line-height:1.35}
.art-head .sub{color:var(--muted);font-size:1.15rem;margin-top:16px}
.art-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:22px;color:var(--faint);font-size:.9rem}
.art-meta .who{display:flex;align-items:center;gap:9px;color:var(--text)}
.art-meta .av{width:36px;height:36px;border-radius:50%;background:linear-gradient(140deg,var(--brand),var(--brand-2));color:var(--brand-ink);display:grid;place-items:center;font-weight:800;font-size:.9rem}
.art-meta .sep{width:4px;height:4px;border-radius:50%;background:var(--faint)}

/* hero banner */
.art-banner{height:220px;border-radius:var(--radius-lg);margin:26px 0 8px;display:grid;place-items:center;color:var(--brand-ink);position:relative;overflow:hidden}
.art-banner svg{width:78px;height:78px;position:relative;z-index:1;opacity:.95}
.art-banner::after{content:"";position:absolute;inset:0;background:radial-gradient(60% 90% at 82% 8%,rgba(255,255,255,.28),transparent 60%)}
.bn1{background:linear-gradient(140deg,#10b981,#14c9a6)}
.bn2{background:linear-gradient(140deg,#2563eb,#14c9a6)}
.bn3{background:linear-gradient(140deg,#0f766e,#10b981)}

/* prose */
.prose{max-width:760px;margin:30px auto 0;font-size:1.08rem}
.prose h2{font-size:1.6rem;font-weight:800;margin:40px 0 14px;scroll-margin-top:90px}
.prose h3{font-size:1.22rem;font-weight:700;margin:28px 0 10px}
.prose p{margin:0 0 18px;color:var(--text)}
.prose a{color:var(--brand);font-weight:600;border-bottom:1px solid var(--brand-glow)}
.prose ul,.prose ol{margin:0 0 20px;padding-inline-start:0;list-style:none;display:grid;gap:12px}
.prose ul li{display:flex;gap:11px;align-items:flex-start;color:var(--text)}
.prose ul li::before{content:"";margin-top:11px;width:8px;height:8px;border-radius:50%;background:var(--brand);flex:none}
.prose ol{counter-reset:li}
.prose ol li{display:flex;gap:12px;align-items:flex-start}
.prose ol li::before{counter-increment:li;content:counter(li);width:26px;height:26px;border-radius:9px;background:var(--accent-soft);color:var(--brand);font-weight:800;font-size:.85rem;display:grid;place-items:center;flex:none;margin-top:4px}
.prose strong{font-weight:700}
.callout{display:flex;gap:14px;padding:18px 20px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);background:var(--card);margin:24px 0}
.callout .ic{width:40px;height:40px;border-radius:12px;background:linear-gradient(140deg,var(--brand),var(--brand-2));color:var(--brand-ink);display:grid;place-items:center;flex:none}
.callout b{display:block;margin-bottom:4px}
.callout p{margin:0;color:var(--muted);font-size:.96rem}
.prose figure{margin:26px 0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px}
.prose table{width:100%;border-collapse:collapse;font-size:.95rem}
.prose table th{text-align:start;color:var(--muted);font-weight:600;padding:9px 10px;border-bottom:1px solid var(--line-strong)}
.prose table td{padding:10px;border-bottom:1px solid var(--line)}
.prose figcaption{color:var(--faint);font-size:.82rem;text-align:center;margin-top:12px}

/* TOC */
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px 22px;margin:4px 0 10px}
.toc b{display:block;margin-bottom:10px;font-size:.95rem}
.toc a{display:block;color:var(--muted);padding:5px 0;font-size:.94rem;transition:.2s}
.toc a:hover{color:var(--brand);padding-inline-start:4px}

/* share + cta end */
.art-cta{max-width:760px;margin:44px auto 0;border-radius:var(--radius-lg);padding:34px;text-align:center;border:1px solid var(--line-strong);background:radial-gradient(60% 120% at 50% 0%,var(--brand-glow),transparent 60%),var(--surface-solid);box-shadow:var(--shadow)}
.art-cta h3{font-size:1.5rem;font-weight:900}
.art-cta p{color:var(--muted);margin:12px 0 0}
.art-cta .btn{margin-top:22px}

/* related */
.related{max-width:1180px;margin:60px auto 0}
.related h2{font-size:1.4rem;font-weight:800;margin-bottom:22px}

/* blog grid (index + related) */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface-solid);box-shadow:var(--shadow-sm);transition:.3s}
.post:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--line-strong)}
.post .cover{height:150px;position:relative;overflow:hidden;display:grid;place-items:center;color:var(--brand-ink)}
.post .cover svg{width:52px;height:52px;opacity:.95;position:relative;z-index:1}
.post .cover.c1{background:linear-gradient(140deg,#10b981,#14c9a6)}
.post .cover.c2{background:linear-gradient(140deg,#2563eb,#14c9a6)}
.post .cover.c3{background:linear-gradient(140deg,#0f766e,#10b981)}
.post .cover::after{content:"";position:absolute;inset:0;background:radial-gradient(60% 80% at 80% 10%,rgba(255,255,255,.25),transparent 60%)}
.post .pbody{padding:20px;display:flex;flex-direction:column;flex:1}
.post .cat{color:var(--brand);font-size:.78rem;font-weight:700;margin-bottom:9px}
.post h3{font-size:1.1rem;font-weight:700;line-height:1.5;margin-bottom:9px}
.post p{color:var(--muted);font-size:.92rem;flex:1}
.post .pmeta{display:flex;align-items:center;gap:10px;margin-top:16px;color:var(--faint);font-size:.8rem}
.post .pmeta .read{margin-inline-start:auto;color:var(--brand);font-weight:700;display:inline-flex;align-items:center;gap:5px}

/* blog index hero */
.blog-hero{text-align:center;padding:56px 0 10px;max-width:40em;margin-inline:auto}
.blog-hero .sec-tag{display:inline-block;color:var(--brand);font-weight:700;font-size:.9rem;margin-bottom:12px}
.blog-hero h1{font-size:clamp(2rem,4.4vw,3rem);font-weight:900}
.blog-hero p{color:var(--muted);font-size:1.12rem;margin-top:14px}

/* footer */
footer{border-top:1px solid var(--line);background:var(--bg-2);padding:46px 0 28px;margin-top:70px}
.foot-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;color:var(--muted);font-size:.88rem}
.foot-bottom a:hover{color:var(--brand)}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

@media(max-width:960px){.blog-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){
  .nav-links{display:none}
  .blog-grid{grid-template-columns:1fr}
  .art-banner{height:160px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}