:root{
  --font: 'Vazirmatn', ui-sans-serif, system-ui, sans-serif;
  --radius:20px; --radius-sm:14px; --radius-xs:10px;
  --accent:#6366f1; --accent-2:#818cf8; --accent-rgb:99,102,241; --accent-glow:rgba(99,102,241,.35);
  --accent-soft:rgba(var(--accent-rgb),.13); --accent-line:rgba(var(--accent-rgb),.24);
  --success:#22c55e; --warning:#f59e0b; --danger:#ef4444; --info:#0ea5e9;
  --ease:cubic-bezier(.4,0,.2,1);
}
html[data-theme="dark"]{
  color-scheme:dark;
  --bg-body:linear-gradient(165deg,#0a0f20 0%,#070a15 46%,#0e0a1e 100%);
  --bg-card:rgba(26,35,56,.60);
  --bg-sunken:rgba(12,18,33,.55);
  --bg-input:rgba(10,15,28,.78);
  --pop-bg:#182134;
  --modal-grad:linear-gradient(180deg,rgba(28,37,58,.97),rgba(12,18,32,.97));
  --border:rgba(148,163,184,.14);
  --border-strong:rgba(148,163,184,.26);
  --text-primary:#f1f5f9; --text-secondary:#9aa8bd; --text-muted:#68758c;
  --shadow:0 10px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 50px rgba(99,102,241,.18);
  --aurora-1:rgba(99,102,241,.38); --aurora-2:rgba(14,165,233,.28); --aurora-3:rgba(168,85,247,.26);
  --grid:rgba(148,163,184,.05);
  --theme-color:#0a0f20;
}
html[data-theme="pink"]{
  color-scheme:dark;
  --bg-body:linear-gradient(165deg,#1d0b30 0%,#150824 46%,#2b0d35 100%);
  --bg-card:rgba(74,28,110,.40);
  --bg-sunken:rgba(45,15,72,.52);
  --bg-input:rgba(40,13,66,.72);
  --pop-bg:#2a1145;
  --modal-grad:linear-gradient(180deg,rgba(63,23,96,.97),rgba(28,10,46,.97));
  --border:rgba(244,114,182,.17);
  --border-strong:rgba(244,114,182,.34);
  --text-primary:#fce7f3; --text-secondary:#dcbde8; --text-muted:#ab8fc4;
  --shadow:0 10px 40px rgba(35,5,45,.55);
  --shadow-glow:0 0 50px rgba(236,72,153,.22);
  --accent:#ec4899; --accent-2:#f472b6; --accent-rgb:236,72,153; --accent-glow:rgba(236,72,153,.4);
  --info:#c084fc;
  --aurora-1:rgba(236,72,153,.38); --aurora-2:rgba(168,85,247,.34); --aurora-3:rgba(244,63,94,.26);
  --grid:rgba(244,114,182,.055);
  --theme-color:#1d0b30;
}
html[data-theme="blue"]{
  color-scheme:dark;
  --bg-body:linear-gradient(165deg,#05192f 0%,#031324 46%,#062338 100%);
  --bg-card:rgba(13,56,92,.42);
  --bg-sunken:rgba(5,28,49,.55);
  --bg-input:rgba(5,26,46,.74);
  --pop-bg:#0d2942;
  --modal-grad:linear-gradient(180deg,rgba(14,54,88,.97),rgba(4,20,36,.97));
  --border:rgba(56,189,248,.17);
  --border-strong:rgba(56,189,248,.33);
  --text-primary:#e0f2fe; --text-secondary:#a5c8de; --text-muted:#6f95b1;
  --shadow:0 10px 40px rgba(2,17,32,.55);
  --shadow-glow:0 0 50px rgba(14,165,233,.22);
  --accent:#0ea5e9; --accent-2:#38bdf8; --accent-rgb:14,165,233; --accent-glow:rgba(14,165,233,.4);
  --info:#22d3ee;
  --aurora-1:rgba(14,165,233,.38); --aurora-2:rgba(6,182,212,.32); --aurora-3:rgba(59,130,246,.30);
  --grid:rgba(56,189,248,.055);
  --theme-color:#05192f;
}
html[data-theme="light"]{
  color-scheme:light;
  --bg-body:linear-gradient(165deg,#f2f4fb 0%,#eceff8 46%,#f4f0fa 100%);
  --modal-grad:linear-gradient(180deg,rgba(255,255,255,.99),rgba(246,248,253,.99));
  --theme-color:#f2f4fb;
  --bg-card:rgba(255,255,255,.78);
  --bg-sunken:rgba(241,244,251,.85);
  --bg-input:rgba(255,255,255,.9);
  --pop-bg:#ffffff;
  --border:rgba(15,23,42,.09);
  --border-strong:rgba(15,23,42,.18);
  --text-primary:#101828; --text-secondary:#4a5568; --text-muted:#78849a;
  --shadow:0 10px 34px rgba(16,24,40,.10);
  --shadow-glow:0 0 40px rgba(99,102,241,.10);
  --aurora-1:rgba(99,102,241,.26); --aurora-2:rgba(14,165,233,.20); --aurora-3:rgba(236,72,153,.18);
  --grid:rgba(15,23,42,.045);
}
*{font-family:var(--font);box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg-body);color:var(--text-primary);min-height:100vh;position:relative;overflow-x:hidden;
  padding:26px 18px calc(40px + env(safe-area-inset-bottom));transition:background .4s var(--ease),color .3s var(--ease)}
.bg-layer{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;
  transform:translate3d(0,0,0);backface-visibility:hidden;-webkit-backface-visibility:hidden}
.bg-grid{position:absolute;inset:0;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 78%)}
.blob{position:absolute;border-radius:50%;filter:blur(90px);will-change:transform}
.blob-1{width:52vw;height:52vw;min-width:340px;min-height:340px;background:var(--aurora-1);top:-16vw;right:-10vw;animation:drift1 26s ease-in-out infinite}
.blob-2{width:44vw;height:44vw;min-width:300px;min-height:300px;background:var(--aurora-2);top:32vh;left:-14vw;animation:drift2 32s ease-in-out infinite}
.blob-3{width:38vw;height:38vw;min-width:260px;min-height:260px;background:var(--aurora-3);bottom:-14vw;right:18vw;animation:drift3 38s ease-in-out infinite}
@keyframes drift1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-6vw,8vh) scale(1.12)}}
@keyframes drift2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(7vw,-6vh) scale(1.1)}}
@keyframes drift3{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-5vw,-7vh) scale(1.15)}}
.bg-noise{position:absolute;inset:0;opacity:.035;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E")}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.blob{animation:none!important}}

.wrap{max-width:760px;margin:0 auto;position:relative;z-index:1}
.wrap-wide{max-width:1020px}
.skip-link{position:absolute;top:-60px;right:0;background:var(--accent);color:#fff;padding:10px 18px;z-index:10000;border-radius:0 0 0 10px;font-weight:700;text-decoration:none;transition:top .25s}
.skip-link:focus{top:0}

.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:26px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text-primary)}
.logo svg{width:32px;height:32px;color:var(--accent);filter:drop-shadow(0 0 14px var(--accent-glow))}
.logo b{font-size:16px;font-weight:900;letter-spacing:-.3px}
.topbar-actions{display:flex;gap:8px;flex-wrap:wrap}
.btn{padding:11px 19px;border:none;border-radius:var(--radius-sm);cursor:pointer;font-size:13.5px;font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;gap:7px;text-decoration:none;
  transition:transform .2s var(--ease),box-shadow .2s,filter .2s,background .2s,border-color .2s}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:0 6px 22px var(--accent-glow)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.07)}
.btn-ghost{background:var(--bg-card);color:var(--text-secondary);border:1px solid var(--border);backdrop-filter:blur(10px)}
.btn-ghost:hover{color:var(--text-primary);border-color:var(--border-strong);transform:translateY(-1px)}

.crumbs{font-size:12.5px;color:var(--text-muted);margin-bottom:14px;font-weight:600}
.crumbs a{color:var(--text-secondary);text-decoration:none}
.crumbs a:hover{color:var(--accent)}
.crumbs span{margin:0 6px;opacity:.5}

.page-head{text-align:center;margin-bottom:34px}
.page-head .kicker{font-size:44px;line-height:1;margin-bottom:12px;display:block}
.page-head h1{font-size:clamp(23px,4.4vw,36px);font-weight:900;line-height:1.5;letter-spacing:-.4px;
  background:linear-gradient(135deg,var(--text-primary),var(--text-secondary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.page-head p{color:var(--text-secondary);font-size:14.5px;line-height:2;margin-top:12px;max-width:600px;margin-inline:auto}
.meta{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:16px}
.pill{background:var(--accent-soft);border:1px solid var(--accent-line);color:var(--accent);
  font-size:12px;font-weight:700;padding:6px 13px;border-radius:999px}

.prose{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  padding:clamp(20px,4vw,40px);box-shadow:var(--shadow);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px)}
.prose p{font-size:15.5px;line-height:2.15;color:var(--text-secondary);margin-bottom:17px}
.prose h2{font-size:clamp(18px,3.2vw,22px);font-weight:900;color:var(--text-primary);margin:38px 0 14px;
  padding-bottom:11px;border-bottom:1px solid var(--border);line-height:1.6}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:16.5px;font-weight:800;color:var(--accent);margin:26px 0 10px;line-height:1.7}
.prose strong{color:var(--text-primary);font-weight:800}
.prose a{color:var(--accent);text-decoration:none;border-bottom:1px solid var(--accent-line);font-weight:700}
.prose a:hover{border-bottom-color:var(--accent)}
.prose ul,.prose ol{margin:6px 0 20px;padding-inline-start:0;list-style:none}
.prose ol{counter-reset:li}
.prose li{font-size:15px;line-height:2.05;color:var(--text-secondary);padding:5px 28px 5px 0;position:relative}
.prose ul li::before{content:'';position:absolute;right:8px;top:19px;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.prose ol li{counter-increment:li}
.prose ol li::before{content:counter(li);position:absolute;right:0;top:8px;width:22px;height:22px;border-radius:7px;
  background:var(--accent-soft);color:var(--accent);font-size:11.5px;font-weight:800;display:flex;align-items:center;justify-content:center}
.prose blockquote{border-inline-start:3px solid var(--accent);background:var(--bg-sunken);
  padding:14px 18px;border-radius:0 12px 12px 0;margin:20px 0}
.prose blockquote p{margin:0;font-size:14.5px}
.prose code{background:var(--bg-sunken);border:1px solid var(--border);border-radius:7px;padding:2px 7px;font-size:13px}
.prose hr{border:none;border-top:1px solid var(--border);margin:30px 0}
.table-scroll{overflow-x:auto;margin:20px 0;border-radius:14px;border:1px solid var(--border)}
.prose table{width:100%;border-collapse:collapse;font-size:14px;min-width:400px}
.prose th{background:var(--bg-sunken);color:var(--text-primary);font-weight:800;padding:13px 15px;text-align:right;font-size:13.5px}
.prose td{padding:13px 15px;color:var(--text-secondary);border-top:1px solid var(--border);line-height:1.9}

.cta{margin-top:26px;background:linear-gradient(135deg,var(--accent-soft),transparent);
  border:1px solid var(--accent-line);border-radius:var(--radius);padding:26px 24px;text-align:center}
.cta h3{font-size:18px;font-weight:900;margin-bottom:9px;color:var(--text-primary)}
.cta p{font-size:14px;color:var(--text-secondary);line-height:1.95;margin-bottom:17px}

.next-nav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:26px}
.next-nav a{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:16px 18px;text-decoration:none;display:block;transition:border-color .2s,transform .2s}
.next-nav a:hover{border-color:var(--accent);transform:translateY(-2px)}
.next-nav .lbl{font-size:11.5px;color:var(--text-muted);font-weight:700;display:block;margin-bottom:6px}
.next-nav .ttl{font-size:14px;color:var(--text-primary);font-weight:800;line-height:1.7}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(288px,1fr));gap:16px;margin-top:8px}
.card-link{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px 22px;
  text-decoration:none;display:flex;flex-direction:column;gap:9px;position:relative;overflow:hidden;
  box-shadow:var(--shadow);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  transition:transform .25s var(--ease),border-color .25s,box-shadow .25s}
.card-link::after{content:'';position:absolute;top:0;inset-inline:0;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));opacity:0;transition:opacity .25s}
.card-link:hover{transform:translateY(-4px);border-color:var(--border-strong);box-shadow:var(--shadow),var(--shadow-glow)}
.card-link:hover::after{opacity:1}
.card-link .ico{font-size:30px;line-height:1}
.card-link h2{font-size:16.5px;font-weight:900;color:var(--text-primary);line-height:1.75}
.card-link p{font-size:13.5px;color:var(--text-secondary);line-height:1.95;flex:1}
.card-link .foot{font-size:11.5px;color:var(--text-muted);font-weight:700;display:flex;justify-content:space-between;align-items:center;margin-top:4px}
.card-link .go{color:var(--accent)}

.site-footer{max-width:1020px;margin:44px auto 0;padding:24px 18px 0;border-top:1px solid var(--border);
  text-align:center;color:var(--text-muted);font-size:12.5px;line-height:2.1;position:relative;z-index:1}
.site-footer a{color:var(--text-secondary);text-decoration:none}
.site-footer a:hover{color:var(--accent)}
@media (max-width:560px){
  .next-nav{grid-template-columns:1fr}
  .topbar{justify-content:center}
  .prose table{min-width:0;font-size:13px}
  .prose th,.prose td{padding:10px 9px;line-height:1.75}
  .prose p,.prose li{font-size:14.5px;line-height:2}
  .prose ol li::before{top:6px}
}