@font-face{font-family:VazirmatnFallback;src:local("Tahoma"),local("Arial");font-weight:600 900;size-adjust:88%}@font-face{font-family:VazirmatnFallback;src:local("Tahoma"),local("Arial");font-weight:100 500;size-adjust:100%}@font-face{font-family:Vazirmatn;src:url('/assets/vazirmatn.woff2') format('woff2');font-weight:100 500;font-display:swap}@font-face{font-family:Vazirmatn;src:url(/assets/vazirmatn-bold.woff2) format("woff2");font-weight:600 900;font-display:swap}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:#101211;color:#f2f3ef;font-family:Vazirmatn,VazirmatnFallback,Tahoma,sans-serif;font-size:16px;line-height:1.9}a{color:inherit;text-decoration:none}button{font:inherit}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid #c4f45b;outline-offset:6px}::selection{background:#c4f45b;color:#101211}.wrap{width:min(1200px,calc(100% - 64px));margin:auto}.notice{background:#c4f45b;color:#192014;text-align:center;font-size:13px;padding:7px 20px}.notice span{margin-right:22px;opacity:.7}.header{display:flex;align-items:center;justify-content:space-between;gap:32px;min-height:106px;border-bottom:1px solid #2b2e29}.brand{display:flex;align-items:center;gap:12px;font-size:23px;white-space:nowrap;line-height:1.5}.brand strong{color:#c4f45b;font-weight:700}.brand small{display:block;font-size:10px;letter-spacing:3px;color:#8f968b;text-align:right;margin-top:3px}.brand-symbol{font:bold 46px/1 Arial;position:relative;color:#c4f45b}.brand-symbol span{position:absolute;top:-4px;right:-6px;font-size:26px;background:#101211}.header nav{display:flex;gap:25px;font-size:14px;color:#b9bdb6}.header nav a:hover,.text-link:hover{color:#c4f45b}.button{display:inline-flex;align-items:center;justify-content:center;gap:23px;background:#c4f45b;color:#151b11;border:1px solid #c4f45b;padding:14px 25px;border-radius:8px;font-weight:700;line-height:1.6;transition:background .2s,transform .2s}.button:hover{background:#d2ff73;transform:translateY(-2px)}.button.small{padding:11px 18px;font-size:14px;gap:18px}.menu-toggle{display:none}.hero{padding-top:76px;padding-bottom:78px;display:grid;grid-template-columns:1.25fr 1fr;gap:85px;align-items:center}.eyebrow{font-size:14px;color:#c4f45b;margin-bottom:18px;display:flex;align-items:center;gap:10px}.eyebrow>span{width:20px;height:2px;background:#c4f45b}.hero h1{font-size:clamp(37px,4vw,56px);line-height:1.65;letter-spacing:-1.7px;margin:0 0 21px;font-weight:900}.hero h1 em{font-style:normal;color:#c4f45b}.hero-copy>p{font-size:18px;color:#aeb4a8;line-height:2.1;margin:0 0 31px}.hero-actions{display:flex;align-items:center;gap:28px}.text-link{font-size:14px}.hero-note{display:flex;align-items:center;gap:11px;margin-top:28px;color:#969d90;font-size:12px}.hero-note i{height:3px;width:3px;background:#737d69;border-radius:50%}.learning-board{background:linear-gradient(145deg,#252e1d,#181c16 70%);border:1px solid #3e4930;border-radius:16px;padding:25px;box-shadow:-15px 18px 0 -1px #101211,-15px 18px 0 0 #272f21;transform:rotate(-2deg)}.learning-board>*{transform:rotate(0deg)}.board-heading{display:flex;justify-content:space-between;gap:12px;color:#bec8b0;font-size:13px}.mono{font-family:monospace;letter-spacing:1px;color:#869674;font-size:11px;direction:ltr}.board-title{font-size:31px;font-weight:800;line-height:1.6;margin:24px 0}.step{display:flex;align-items:center;gap:17px;background:#23281f;border:1px solid #39412f;border-radius:9px;margin-top:10px;padding:14px 17px;transition:background .2s}.step:hover{background:#303b24}.step>b{font-size:23px;color:#c4f45b;font-weight:400}.step>div{flex:1}.step strong{display:block;font-size:16px}.step small{font-size:12px;color:#a2ac95}.step>span{color:#a5bd85}.step.featured{background:#c4f45b;color:#161f0d;border-color:#c4f45b}.step.featured>b,.step.featured>span{color:#405c1b}.step.featured small{color:#4c622f}.board-foot{display:flex;justify-content:space-between;font-size:12px;color:#9ca88f;margin-top:24px}.quick-strip{border-block:1px solid #2b2e29;background:#151714}.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);padding-block:24px}.quick-grid>a{display:flex;gap:14px;align-items:center;border-left:1px solid #30342d;padding:8px 24px}.quick-grid>a:first-child{padding-right:0}.quick-grid>a:last-child{border:0}.quick-grid b{font-size:27px;color:#c4f45b;font-weight:400}.quick-grid a>span:nth-child(2){flex:1;font-size:15px}.quick-grid small{display:block;font-size:12px;color:#90998a}.quick-grid a>span:last-child{color:#747e6c}.section{padding-block:80px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:32px}.muted{color:#98a28f;margin-bottom:8px}h2{font-size:30px;line-height:1.6;margin:0 0 12px}h3{line-height:1.8}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.course-card{border:1px solid #30352b;background:#181b16;border-radius:12px;padding:25px;transition:border-color .2s,transform .2s;display:flex;flex-direction:column}.course-card:hover{border-color:#819c60;transform:translateY(-4px)}.card-top{display:flex;align-items:center;justify-content:space-between}.category{font-size:12px;color:#bace9d;background:#2b3522;border-radius:5px;padding:3px 10px;display:inline-block}.lesson-number{font-family:Arial,sans-serif;font-size:34px;color:#525e45;font-weight:700}.course-card h3{font-size:19px;margin:26px 0 10px;max-width:290px}.course-card p{font-size:14px;color:#a0a796;margin:0 0 28px;flex:1}.card-bottom{border-top:1px solid #30352b;display:flex;justify-content:space-between;padding-top:17px;font-size:12px;color:#88937d;gap:10px}.card-bottom span:last-child{color:#c4f45b}.start-banner{border:1px solid #47582e;background:#202a18;display:flex;align-items:center;justify-content:space-between;gap:30px;border-radius:14px;padding:37px 40px}.start-banner p{color:#acb79f;font-size:14px;margin:0}.start-banner .eyebrow{margin-bottom:9px}.start-banner .button{flex-shrink:0}.faq-layout{display:grid;grid-template-columns:1fr 1.65fr;gap:90px}.faq-layout>div>p{color:#949f89;font-size:15px;max-width:270px}.faqs details{border-bottom:1px solid #33392d}.faqs summary{cursor:pointer;list-style:none;padding:20px 0;display:flex;justify-content:space-between;gap:20px;font-size:16px}.faqs summary::-webkit-details-marker{display:none}.faqs summary:after{content:'+';color:#b6c49d;font-size:23px}.faqs details[open] summary:after{content:'−'}.faqs details p{color:#a3ac9a;font-size:14px;margin:0 0 20px;line-height:2.1}footer{border-top:1px solid #30352b;background:#151714;padding-top:48px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:65px;padding-bottom:38px}.footer-grid p{font-size:14px;color:#8f9985;max-width:450px}.footer-grid h3{font-size:14px;margin:0 0 15px}.footer-grid>div>a:not(.brand){display:block;color:#a2aa9a;font-size:13px;margin-top:9px}.footer-bottom{border-top:1px solid #2b3025;display:flex;justify-content:space-between;padding-block:21px;gap:20px;font-size:12px;color:#808b75}.skip{position:absolute;right:20px;top:-80px;background:#c4f45b;color:#111;padding:12px;z-index:5}.skip:focus{top:10px}.page-title{font-size:38px;line-height:1.7;max-width:750px}.intro{color:#a7b09d;font-size:18px;margin-bottom:35px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:75px;padding-block:45px 80px}.breadcrumbs{font-size:13px;color:#8f9b81;margin-bottom:40px}.article-layout h1{font-size:38px;line-height:1.7;margin:20px 0}.article-meta{font-size:13px;color:#849077;border-bottom:1px solid #333b2b;padding-bottom:25px;display:flex;gap:18px}.article-body section{margin-block:35px}.article-body h2{font-size:24px}.article-body p,.prose p{color:#bbc3b2;line-height:2.25}.article-layout aside{padding-top:54px}.toc{position:sticky;top:25px;border:1px solid #35402c;border-radius:10px;padding:22px;background:#191e15}.toc h3{margin-top:0;font-size:17px}.toc a{display:block;color:#a5b296;font-size:14px;padding:10px 0;border-top:1px solid #303c26}.aside-cta{margin-top:25px;background:#26341b;border-radius:10px;padding:22px}.aside-cta h3{font-size:18px}.aside-cta p{font-size:14px;color:#b2bfa4}.aside-cta .button{font-size:14px;padding:12px}.source-box{padding:22px;border-right:3px solid #c4f45b;background:#1b2416;font-size:14px;margin:35px 0}.source-box a,.prose a{color:#c4f45b;text-decoration:underline}.source-box p{font-size:13px;margin-bottom:0}.prose{max-width:850px;min-height:55vh}.prose h1{font-size:38px}.prose h2{font-size:24px;margin-top:32px}@media(min-width:1500px){.hero{padding-block:95px}}@media(max-width:1050px){.header{gap:20px}.header nav{gap:15px;font-size:13px}.hero{gap:45px}.hero h1{font-size:41px}.hero-note{flex-wrap:wrap}.quick-grid>a{padding:8px 15px}.start-banner{align-items:start;flex-direction:column}.article-layout{gap:35px}.faq-layout{gap:45px}}@media(max-width:800px){.wrap{width:calc(100% - 36px)}.notice{font-size:12px}.notice span{display:none}.header{min-height:85px;gap:12px;flex-wrap:wrap;position:relative}.brand{font-size:20px}.brand-symbol{font-size:36px}.brand small{font-size:9px}.header .button{margin-right:auto;font-size:12px;padding:10px 12px;gap:8px}.menu-toggle{display:block;background:none;border:1px solid #3d4535;color:#eef4e7;padding:4px 11px;border-radius:6px;order:3}.header nav{display:none;order:4;flex-basis:100%;padding:16px;background:#1e2518;margin-bottom:16px;border-radius:8px}.header nav.open{display:flex;flex-direction:column;gap:15px}.hero{grid-template-columns:1fr;gap:46px;padding-block:45px 60px}.hero h1{font-size:43px;letter-spacing:-1px}.hero-copy>p{font-size:16px}.hero-actions{gap:20px}.hero-actions .button{padding:13px 18px;font-size:14px}.learning-board{max-width:500px;width:calc(100% - 12px);margin:auto;transform:rotate(-1deg)}.quick-grid{grid-template-columns:1fr 1fr;gap:16px;padding-block:23px}.quick-grid>a{padding:8px 12px!important}.quick-grid>a:nth-child(2){border:0}.cards{grid-template-columns:1fr 1fr}.section{padding-block:52px}h2{font-size:25px}.section-heading{align-items:start}.section-heading>.text-link{font-size:12px;white-space:nowrap;margin-top:28px}.faq-layout{grid-template-columns:1fr;gap:15px}.faq-layout h2 br{display:none}.faq-layout>div>p{max-width:none}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{flex-direction:column;gap:5px}.article-layout{grid-template-columns:1fr;gap:10px}.article-layout aside{padding-top:0}.toc{position:static}.article-layout h1,.page-title,.prose h1{font-size:30px}.start-banner{padding:25px}.start-banner .button{font-size:14px;white-space:normal}.intro{font-size:16px}}@media(max-width:480px){.cards{grid-template-columns:1fr}.hero h1{font-size:37px}.hero-note{font-size:11px;gap:7px}.hero-actions{gap:16px}.hero-actions .text-link{font-size:13px}.quick-grid a>span:nth-child(2){font-size:13px}.quick-grid b{font-size:23px}.section-heading{display:block}.section-heading>.text-link{display:inline-block;margin-top:0}.header .button{font-size:11px}.brand{gap:8px;font-size:17px}.brand-symbol{font-size:31px}.menu-toggle{font-size:17px;padding:3px 8px}.course-card h3{max-width:none}.board-title{font-size:28px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;transform:none!important}}

/* Keep navigation and registration available while reading. */
.site-header{position:sticky;top:0;z-index:100;background:#101211;box-shadow:0 6px 18px #0002}
html{scroll-padding-top:122px}
body .toc{top:122px}
@media(max-width:800px){html{scroll-padding-top:101px}.site-header .header{flex-wrap:nowrap;gap:8px}.site-header .header nav{position:absolute;top:100%;left:0;right:0;margin:0;max-height:calc(100dvh - 100px);overflow:auto;box-shadow:0 10px 18px #0005}.site-header .header .button{white-space:nowrap;padding:10px 8px;gap:4px}}
@media(max-width:360px){.site-header .brand img{width:112px!important}.site-header .header{gap:6px}.site-header .header .button{font-size:10px}}
