/* ===================================================================
   Capora Articles — style.css
   طراحی ادیتوریال هم‌راستا با هویت بصری اپ کاپورا
   (رنگ‌ها و فونت از app.min.css گرفته شده، لایه خواندنی مستقل ساخته شده)
   =================================================================== */

:root{
  --bg:#f8fafc;
  --surface:#ffffff;
  --card:#f1f5f9;
  --primary:#6366f1;
  --primary-dark:#4338ca;
  --green:#10b981;
  --amber:#f59e0b;
  --gold:#c9971f;
  --red:#ef4444;
  --text:#1e293b;
  --secondary:#64748b;
  --border:#e2e8f0;
  --display-bg:#0b1220;
  --display-text:#34d399;
  --display-text-dim:#64748b;
  --shadow:0 10px 30px rgba(30,41,59,.06);
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0f172a;--surface:#1a2438;--card:#1e293b;--text:#f1f5f9;
    --secondary:#94a3b8;--border:#324054;--shadow:0 10px 30px rgba(0,0,0,.35);
  }
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:'Vazirmatn',Tahoma,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;}

.wrap{max-width:1040px;margin:0 auto;padding:0 20px;}
.readwrap{max-width:720px;margin:0 auto;padding:0 20px;}

/* ---------- HEADER ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;}
.logo{display:flex;align-items:center;gap:7px;font-weight:900;font-size:17px;color:var(--primary);text-decoration:none;}
.logo-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(150deg,#6366f1,#4338ca);color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;box-shadow:0 4px 10px rgba(99,102,241,.35);}
.site-nav{display:flex;align-items:center;gap:4px;}
.site-nav a{font-size:12.5px;font-weight:700;color:var(--secondary);text-decoration:none;padding:8px 12px;border-radius:9px;transition:.15s;}
.site-nav a:hover,.site-nav a.active{color:var(--primary);background:rgba(99,102,241,.1);}
.nav-cta{background:var(--primary) !important;color:#fff !important;}
.nav-cta:hover{background:var(--primary-dark) !important;color:#fff !important;}

/* ---------- HERO (hub) ---------- */
.hub-hero{padding:52px 0 34px;text-align:center;}
.hub-kicker{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:800;color:var(--primary);background:rgba(99,102,241,.1);padding:6px 14px;border-radius:20px;margin-bottom:16px;}
.hub-hero h1{font-size:clamp(26px,4.5vw,38px);font-weight:900;letter-spacing:-.02em;margin-bottom:14px;}
.hub-hero h1 span{color:var(--primary);}
.hub-hero p{color:var(--secondary);font-size:15px;max-width:560px;margin:0 auto;line-height:1.9;}

.chip-row{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:22px;}
.chip{font-size:11.5px;font-weight:700;padding:7px 13px;border-radius:20px;border:1px solid var(--border);color:var(--secondary);background:var(--surface);}

/* ---------- SEARCH BOX (hub) ---------- */
.articles-search-wrap{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:16px;
  padding:14px 18px;
  margin-bottom:8px;
  box-shadow:var(--shadow);
  transition:border-color .15s, box-shadow .15s;
}
.articles-search-wrap:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(99,102,241,.12);
}
.articles-search-icon{ font-size:15px; opacity:.6; flex-shrink:0; }
.articles-search-input{
  flex:1;
  border:none;
  outline:none;
  background:transparent;
  font-family:'Vazirmatn',Tahoma,sans-serif;
  font-size:14px;
  font-weight:600;
  color:var(--text);
  min-width:0;
}
.articles-search-input::placeholder{ color:var(--secondary); font-weight:500; }
.articles-search-clear{
  cursor:pointer;
  font-size:12px;
  color:var(--secondary);
  background:var(--card);
  width:22px;height:22px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
  transition:.15s;
}
.articles-search-clear:hover{ background:var(--red); color:#fff; }
.articles-search-count{
  font-size:12px;
  color:var(--secondary);
  font-weight:700;
  margin-bottom:14px;
  padding:0 4px;
}
.articles-no-results{
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  gap:6px;
  padding:60px 20px;
  color:var(--secondary);
}
.articles-no-results-icon{ font-size:34px; opacity:.5; margin-bottom:6px; }
.articles-no-results p{ font-size:14px; font-weight:800; color:var(--text); }
.articles-no-results span{ font-size:12.5px; }

/* ---------- ARTICLE GRID (hub) ---------- */
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;padding:8px 0 60px;}
.acard{
  background:var(--surface);border:1px solid var(--border);border-radius:18px;
  padding:20px;display:flex;flex-direction:column;gap:12px;text-decoration:none;color:var(--text);
  box-shadow:var(--shadow);transition:transform .18s, box-shadow .18s;position:relative;overflow:hidden;
}
.acard:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(30,41,59,.12);}
.acard::before{content:'';position:absolute;top:0;right:0;width:70px;height:70px;border-radius:50%;background:var(--cat-color,var(--primary));opacity:.08;transform:translate(20px,-30px);}
.acard-cat{display:inline-flex;align-items:center;gap:5px;font-size:10.5px;font-weight:800;color:var(--cat-color,var(--primary));width:fit-content;}
.acard h2{font-size:16.5px;font-weight:800;line-height:1.5;}
.acard p{font-size:12.5px;color:var(--secondary);line-height:1.8;flex:1;}
.acard-meta{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--secondary);border-top:1px dashed var(--border);padding-top:10px;}
.acard-arrow{font-weight:900;color:var(--cat-color,var(--primary));}

/* ---------- ARTICLE PAGE ---------- */
.breadcrumb{font-size:11.5px;color:var(--secondary);padding:18px 0 0;display:flex;gap:6px;flex-wrap:wrap;}
.breadcrumb a{text-decoration:none;color:var(--secondary);}
.breadcrumb a:hover{color:var(--primary);}

.article-head{padding:18px 0 26px;border-bottom:1px solid var(--border);margin-bottom:28px;}
.cat-badge{display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:800;color:#fff;background:var(--cat-color,var(--primary));padding:6px 13px;border-radius:20px;margin-bottom:16px;}
.article-head h1{font-size:clamp(24px,4vw,33px);font-weight:900;line-height:1.55;letter-spacing:-.01em;margin-bottom:14px;}
.article-sub{color:var(--secondary);font-size:14.5px;line-height:1.9;}
.article-meta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:18px;font-size:11.5px;color:var(--secondary);}
.article-meta-row span{display:flex;align-items:center;gap:5px;}

.toc{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px 20px;margin-bottom:32px;}
.toc-title{font-size:12.5px;font-weight:800;color:var(--secondary);margin-bottom:10px;display:flex;align-items:center;gap:6px;}
.toc ol{list-style:none;display:flex;flex-direction:column;gap:7px;counter-reset:toc;}
.toc li{counter-increment:toc;font-size:13px;}
.toc li a{text-decoration:none;color:var(--text);display:flex;gap:8px;}
.toc li a::before{content:counter(toc);font-size:10.5px;font-weight:800;color:var(--cat-color,var(--primary));background:var(--surface);border:1px solid var(--border);width:20px;height:20px;border-radius:6px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.toc li a:hover{color:var(--primary);}

.prose{font-size:15.5px;}
.prose h2{font-size:21px;font-weight:900;margin:38px 0 14px;letter-spacing:-.01em;scroll-margin-top:80px;}
.prose h3{font-size:16.5px;font-weight:800;margin:24px 0 10px;color:var(--text);scroll-margin-top:80px;}
.prose p{margin-bottom:16px;color:var(--text);}
.prose ul,.prose ol{margin:0 0 16px;padding-inline-start:22px;}
.prose li{margin-bottom:8px;}
.prose strong{font-weight:800;}

/* signature element: calculator "digital display" formula box */
.formula-box{
  background:var(--display-bg);border-radius:16px;padding:22px 22px 20px;margin:22px 0 26px;
  position:relative;overflow:hidden;box-shadow:0 14px 30px rgba(2,6,23,.35);
}
.formula-box::before{content:'';position:absolute;inset:0;background:radial-gradient(600px 200px at 10% 0%, rgba(99,102,241,.18), transparent 60%);}
.formula-led{display:flex;align-items:center;gap:7px;font-size:10.5px;font-weight:800;color:#64748b;letter-spacing:.06em;margin-bottom:12px;position:relative;}
.formula-dot{width:7px;height:7px;border-radius:50%;background:var(--display-text);box-shadow:0 0 8px var(--display-text);animation:blink 2.4s infinite;}
@keyframes blink{0%,100%{opacity:1;}50%{opacity:.35;}}
.formula-readout{
  font-family:'Vazirmatn',monospace;direction:ltr;text-align:left;
  font-size:clamp(14px,3vw,18px);font-weight:700;color:var(--display-text);
  letter-spacing:.02em;line-height:1.9;position:relative;overflow-x:auto;white-space:pre;
}
.formula-note{margin-top:12px;font-size:12px;color:#94a3b8;position:relative;line-height:1.8;}

.example-box{background:var(--card);border-inline-start:4px solid var(--green);border-radius:12px;padding:18px 20px;margin:20px 0;}
.example-box .example-tag{font-size:11px;font-weight:800;color:var(--green);margin-bottom:8px;display:block;}

.tip-box{background:var(--card);border-inline-start:4px solid var(--amber);border-radius:12px;padding:18px 20px;margin:20px 0;}
.tip-box .tip-tag{font-size:11px;font-weight:800;color:var(--amber);margin-bottom:8px;display:block;}

.warn-box{background:var(--card);border-inline-start:4px solid var(--red);border-radius:12px;padding:18px 20px;margin:20px 0;}
.warn-box .warn-tag{font-size:11px;font-weight:800;color:var(--red);margin-bottom:8px;display:block;}

table{width:100%;border-collapse:collapse;margin:18px 0 24px;font-size:13px;border-radius:12px;overflow:hidden;border:1px solid var(--border);}
thead th{background:var(--card);font-weight:800;padding:11px 12px;text-align:right;border-bottom:1px solid var(--border);}
tbody td{padding:10px 12px;border-bottom:1px solid var(--border);color:var(--text);}
tbody tr:last-child td{border-bottom:none;}

/* CTA */
.cta-box{
  margin:38px 0;padding:28px 26px;border-radius:20px;color:#fff;
  background:linear-gradient(140deg,var(--primary) 0%, var(--primary-dark) 100%);
  box-shadow:0 16px 32px rgba(99,102,241,.3);position:relative;overflow:hidden;
}
.cta-box::after{content:'';position:absolute;width:160px;height:160px;border-radius:50%;background:rgba(255,255,255,.08);top:-60px;left:-50px;}
.cta-box h3{font-size:18px;font-weight:900;margin-bottom:8px;position:relative;}
.cta-box p{font-size:13.5px;opacity:.92;line-height:1.9;margin-bottom:16px;position:relative;}
.cta-btn{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--primary-dark);font-weight:800;font-size:13.5px;padding:11px 20px;border-radius:12px;text-decoration:none;position:relative;transition:.15s;}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(0,0,0,.2);}

/* FAQ */
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:14px;margin-bottom:10px;overflow:hidden;}
.faq-item summary{list-style:none;cursor:pointer;padding:16px 18px;font-weight:700;font-size:13.5px;display:flex;justify-content:space-between;align-items:center;gap:12px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:'+';font-size:20px;font-weight:400;color:var(--primary);flex-shrink:0;transition:.2s;}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item .faq-a{padding:0 18px 16px;font-size:13px;color:var(--secondary);line-height:1.9;}

/* related / internal links */
.related-title{font-size:15px;font-weight:800;margin:44px 0 14px;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-bottom:20px;}
.related-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px 16px;text-decoration:none;color:var(--text);font-size:12.5px;font-weight:700;display:flex;align-items:center;justify-content:space-between;transition:.15s;}
.related-card:hover{border-color:var(--primary);color:var(--primary);}
.tool-pill-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:40px;}
.tool-pill{font-size:11.5px;font-weight:700;background:var(--card);border:1px solid var(--border);padding:8px 14px;border-radius:20px;text-decoration:none;color:var(--secondary);}
.tool-pill:hover{color:var(--primary);border-color:var(--primary);}

/* footer */
.site-footer{border-top:1px solid var(--border);padding:34px 0;margin-top:20px;}
.site-footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;}
.site-footer p{font-size:11.5px;color:var(--secondary);}
.footer-links{display:flex;gap:16px;}
.footer-links a{font-size:11.5px;color:var(--secondary);text-decoration:none;}
.footer-links a:hover{color:var(--primary);}

@media (max-width:600px){
  .site-nav a:not(.nav-cta){display:none;}
  .hub-hero{padding:34px 0 24px;}
}