:root{--green-900:#08372a;--green-800:#0a5239;--green-700:#0e7a52;--green-600:#129463;--green-500:#19a974;--green-300:#7fd3ad;--mint-100:#e9f6ef;--mint-50:#f4fbf7;--ink:#0c1813;--slate:#566860;--line:#e2ece7;--white:#fff;--paper:#fbfdfc;--amber:#b87514;--amber-bg:#fdf4e3;--radius:20px;--shadow-sm:0 1px 2px rgba(12,24,19,.04),0 4px 16px rgba(12,24,19,.05);--shadow-md:0 8px 30px rgba(8,55,42,.10);--shadow-lg:0 30px 70px -20px rgba(8,55,42,.28);--maxw:1180px;--ease:cubic-bezier(.22,1,.36,1)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Vazirmatn,system-ui,sans-serif;background:var(--paper);color:var(--ink);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}a{color:inherit;text-decoration:none}::selection{background:var(--green-500);color:#fff}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}header.nav{position:fixed;top:0;left:0;right:0;z-index:100}.nav-inner{max-width:var(--maxw);margin:14px auto 0;justify-content:space-between;padding:12px 22px;border-radius:18px;background:rgba(255,255,255,.82);backdrop-filter:blur(18px) saturate(150%);-webkit-backdrop-filter:blur(18px) saturate(150%);border:1px solid rgba(226,236,231,.9);box-shadow:var(--shadow-sm)}.brand,.nav-inner{display:flex;align-items:center}.brand{gap:12px}.logo{width:42px;height:42px;border-radius:13px;background:linear-gradient(145deg,var(--green-600),var(--green-800));display:grid;place-items:center;color:#fff;font-weight:900;font-size:1.4rem;box-shadow:0 6px 16px rgba(10,82,57,.35);overflow:hidden}.logo img{width:100%;height:100%;object-fit:contain;display:block}.logo-nobg{background:none;box-shadow:none}.brand b{font-size:1.2rem;font-weight:800}.brand small{display:block;font-size:.66rem;color:var(--slate);font-weight:500;margin-top:-3px}.nav-right{display:flex;gap:10px}.btn,.nav-right{align-items:center}.btn{display:inline-flex;justify-content:center;gap:9px;font-family:inherit;font-weight:700;font-size:.95rem;cursor:pointer;border:none;padding:12px 22px;border-radius:13px;transition:all .3s var(--ease)}.btn-primary{background:linear-gradient(145deg,var(--green-600),var(--green-800));color:#fff;box-shadow:0 8px 22px -6px rgba(10,82,57,.55)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px -8px rgba(10,82,57,.6)}.back-link{display:inline-flex;align-items:center;gap:7px;color:var(--slate);font-size:.92rem;font-weight:600;padding:9px 13px;border-radius:11px;transition:.25s}.back-link:hover{color:var(--green-800);background:var(--mint-100)}.page{padding:118px 0 90px}.crumb{display:flex;align-items:center;gap:8px;color:var(--slate);font-size:.88rem;font-weight:600;margin-bottom:20px;flex-wrap:wrap}.crumb a{transition:.25s}.crumb a:hover{color:var(--green-700)}.crumb svg{width:15px;height:15px;opacity:.6}.crumb .cur{color:var(--ink)}.video-head{margin-bottom:24px}.video-head .tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.tag{font-size:.76rem;font-weight:700;padding:5px 12px;border-radius:8px}.tag-cat{background:var(--mint-100);color:var(--green-800)}.tag-meta{background:#fff;border:1px solid var(--line);color:var(--slate);display:inline-flex;align-items:center;gap:6px}.tag-meta svg{width:14px;height:14px;color:var(--green-700)}.video-head h1{font-size:clamp(1.6rem,3.2vw,2.4rem);font-weight:800;letter-spacing:-.02em;text-wrap:balance}.player{position:relative;width:100%;aspect-ratio:16/9;border-radius:24px;overflow:hidden;background:linear-gradient(135deg,var(--green-800),var(--green-900));box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.08)}.player video{width:100%;height:100%;object-fit:cover;display:block}.player .poster{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;cursor:pointer;transition:.4s var(--ease)}.player .poster:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(135deg,rgba(255,255,255,.04),rgba(255,255,255,.04) 2px,transparent 0,transparent 12px);opacity:.7}.player .poster:after{content:"";position:absolute;top:-120px;right:-80px;width:360px;height:360px;border-radius:50%;background:rgba(25,169,116,.22);filter:blur(8px)}.poster .play{position:relative;z-index:2;width:88px;height:88px;border-radius:50%;background:rgba(255,255,255,.95);display:grid;place-items:center;color:var(--green-800);box-shadow:0 18px 44px -10px rgba(0,0,0,.5);transition:.35s var(--ease)}.poster .play svg{width:34px;height:34px;margin-right:4px}.player:hover .poster .play{transform:scale(1.08)}.poster .ptitle{position:relative;z-index:2;color:#fff;font-weight:800;font-size:1.1rem}.poster .pnote{position:relative;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.78rem;color:rgba(255,255,255,.62);background:rgba(0,0,0,.22);padding:5px 12px}.poster .dur,.poster .pnote{z-index:2;border-radius:8px;direction:ltr}.poster .dur{position:absolute;bottom:16px;left:16px;background:rgba(0,0,0,.55);color:#fff;font-weight:700;font-size:.82rem;padding:5px 11px}.player.playing .poster{opacity:0;visibility:hidden}.desc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px;box-shadow:var(--shadow-sm);margin-top:26px}.desc-card h2{font-size:1.2rem;font-weight:800;margin-bottom:12px}.desc-card .rich-content,.desc-card p{color:var(--slate);font-size:.98rem;line-height:1.95}.desc-card .rich-content p{margin:0 0 12px}.desc-card .rich-content h2{font-size:1.1rem;font-weight:800;color:var(--ink);margin:18px 0 8px}.desc-card .rich-content ol,.desc-card .rich-content ul{padding-right:22px;margin:12px 0;color:var(--ink)}.desc-card .rich-content li{margin:8px 0}.desc-card .rich-content b,.desc-card .rich-content strong{color:var(--ink)}.desc-card .rich-content a{color:var(--green-700);text-decoration:underline}.steps{margin-top:18px;display:flex;flex-direction:column;gap:12px}.steps .s{display:flex;gap:13px;align-items:flex-start}.steps .n{width:28px;height:28px;border-radius:9px;background:var(--mint-100);color:var(--green-800);font-weight:800;font-size:.86rem;display:grid;place-items:center;flex-shrink:0;margin-top:2px}.steps .s p{flex:1 1;font-size:.94rem;color:var(--ink)}.steps .s p span{color:var(--slate)}.tip{margin-top:22px;display:flex;gap:12px;align-items:flex-start;background:var(--amber-bg);border:1px solid #f0dcb4;border-radius:16px;padding:16px 20px;color:#7a5410;font-size:.92rem;line-height:1.85}.tip svg{width:21px;height:21px;color:var(--amber);flex-shrink:0;margin-top:3px}.tip b{color:#5e3f0c}footer{background:#fff;border-top:1px solid var(--line);padding:48px 0 28px;margin-top:70px}.foot-bottom{display:flex;justify-content:space-between;align-items:center;color:var(--slate);font-size:.85rem;flex-wrap:wrap;gap:12px}.foot-bottom .brand .logo{width:36px;height:36px;font-size:1.2rem;border-radius:11px}.foot-bottom .brand b{font-size:1.05rem}.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}.reveal.in{opacity:1;transform:none}@media(max-width:900px){.page{padding:104px 0 70px}.desc-card{padding:24px 22px}}@media(max-width:600px){.wrap{padding:0 16px}.nav-inner{padding:10px 14px}.brand small,.label-hide{display:none}.back-link{padding:9px 10px}.page{padding:96px 0 56px}.player{border-radius:18px}.poster .play{width:68px;height:68px}.poster .play svg{width:27px;height:27px}.poster .ptitle{font-size:.98rem;padding:0 16px;text-align:center}.poster .pnote{display:none}.desc-card{padding:22px 18px;border-radius:18px}.foot-bottom{justify-content:center;text-align:center}}