@font-face{font-family:Vazirmatn;src:url('./fonts/Vazirmatn-Bold.woff2') format('woff2');font-weight:600 900;font-display:swap}
@font-face{font-family:Vazirmatn;src:url('./fonts/Vazirmatn-Regular.woff2') format('woff2');font-weight:400;font-display:swap}
:root{color-scheme:light;--paper:#fffaf0;--ink:#253334;--accent:#17645e;--wash:#e2efea;--line:#bdc9c2;--max:1080px;--gutter:22px;font-family:'Ysabeau Office',system-ui,sans-serif;color:var(--ink);background:#f6efe0;font-size:18px;line-height:1.6}
*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}a:focus-visible,summary:focus-visible{outline:3px solid #233e8b;outline-offset:5px}cocode-head,cocode-foot{display:block;--cocode-max:1080px;--cocode-gutter:22px}main,.page-nav{width:min(calc(100% - var(--gutter)*2),var(--max));margin-inline:auto}.page-nav{display:flex;align-items:center;gap:10px 22px;flex-wrap:wrap;padding-block:12px;border-bottom:1px solid var(--line);font-size:.94rem}.page-nav a{display:inline-flex;align-items:center;min-height:44px}.lang-switch{margin-inline-start:auto}.skip{position:absolute;top:10px;left:12px;padding:8px 14px;z-index:20;background:var(--paper);transform:translateY(-200%)}.skip:focus{transform:none}.hero{padding-block:48px 32px}.intro-label{color:var(--accent);font-weight:650;margin-block:0 18px}h1,h2{font-family:'Ibarra Real Nova',Georgia,serif;line-height:1.08;font-weight:600;letter-spacing:-.035em}h1{font-size:clamp(2.5rem,5.8vw,4.4rem);margin-block:0 24px;max-width:720px}h2{font-size:clamp(1.85rem,3.7vw,2.9rem);margin-block:0 22px}h3{font-size:1rem;margin-block:22px 8px}p{margin-block:0 18px}.lead{font-size:1.13rem;line-height:1.6}.primary{display:inline-flex;align-items:center;min-height:48px;background:var(--accent);color:var(--paper);padding:10px 20px;text-decoration:none;border-radius:4px;margin-block:6px}.primary:hover{background:#124c48}.branch{margin:30px 0 0;padding:10px 0 0}.branch svg{width:100%;height:auto;display:block;overflow:visible}.branch figcaption{font-size:.86rem;color:var(--accent);text-align:center}section:not(.hero){border-top:1px solid var(--line);padding-block:38px}.section-number{color:var(--accent);font-size:.9rem;margin-block:0 12px}pre{background:var(--paper);border:1px solid var(--line);border-inline-start:4px solid var(--accent);padding:18px;margin-block:10px 18px;overflow-x:auto;direction:ltr;text-align:left;font-size:.83rem;line-height:1.6;border-radius:0 4px 4px 0}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em;overflow-wrap:anywhere;direction:ltr;unicode-bidi:isolate}pre code{font-size:1em;overflow-wrap:normal}.tool-list{margin-block-start:26px;border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line)}summary{display:flex;flex-direction:column;gap:5px;min-height:64px;padding:18px 32px 18px 0;cursor:pointer;position:relative}summary::after{content:'+';position:absolute;inset-inline-end:6px;top:16px;font-size:1.3rem;color:var(--accent)}details[open] summary::after{content:'−'}summary code{font-weight:650;color:var(--accent);font-size:1rem}summary span{font-size:.95rem}.tool-body{padding-block:0 18px;max-width:820px}.tool-body p{font-size:.97rem}details[open]{background:linear-gradient(90deg,rgba(226,239,234,.35),transparent)}.reading{max-width:850px}.reading ol{padding-inline-start:26px}.reading li{padding-inline-start:6px;margin-block:12px}.credits{border-top:1px solid var(--line);padding-block:24px;font-size:.86rem}.credits p{margin-block:0 4px}[dir=rtl]{font-family:Vazirmatn,'Ysabeau Office',sans-serif}[dir=rtl] h1,[dir=rtl] h2{font-family:Vazirmatn,sans-serif;letter-spacing:0;line-height:1.5}[dir=rtl] h1{font-size:clamp(2rem,4.2vw,3.2rem)}[dir=rtl] h2{font-size:clamp(1.7rem,3vw,2.3rem)}[dir=rtl] summary{padding-inline:0 32px}[dir=rtl] .branch{direction:ltr}[dir=rtl] .branch text{font-family:Vazirmatn,sans-serif;font-size:15px}
@media(min-width:640px){:root{--gutter:32px}cocode-head,cocode-foot{--cocode-gutter:32px}.hero{padding-block:64px 44px}summary{display:grid;grid-template-columns:180px 1fr;gap:18px;align-items:baseline}section:not(.hero){padding-block:48px}}
@media(min-width:960px){.hero{display:grid;grid-template-columns:1.35fr 1fr;gap:25px;align-items:center}.hero h1{font-size:3.9rem}.branch{margin:0}.setup{display:grid;grid-template-columns:.85fr 1.35fr;gap:60px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}