:root{color-scheme:dark;--bg:#0b1020;--panel:#111a2d;--panel2:#151f35;--line:rgba(174,190,220,.14);--text:#edf2ff;--muted:#9aa8c1;--accent:#8b9cff;--mint:#75e0c1;--max:1120px}
    *{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:radial-gradient(ellipse at 12% 0%,rgba(91,111,220,.17),transparent 34rem),radial-gradient(ellipse at 90% 24%,rgba(58,180,155,.09),transparent 30rem),var(--bg);color:var(--text);font-family:"Vazirmatn","DM Sans",sans-serif;line-height:1.8}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible{outline:2px solid var(--mint);outline-offset:4px}.wrap{width:min(var(--max),calc(100% - 40px));margin:auto}.topbar{position:sticky;top:0;z-index:10;background:rgba(11,16,32,.82);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font:700 1.05rem "DM Sans",sans-serif;letter-spacing:.08em}.brand span{color:var(--accent)}.navlinks{display:flex;align-items:center;gap:24px;color:var(--muted);font-size:.9rem}.navlinks a:hover{color:var(--text)}.actions{display:flex;align-items:center;gap:10px}.lang,.portal{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:999px;padding:9px 14px;font:600 .85rem "Vazirmatn","DM Sans",sans-serif;cursor:pointer}.portal{background:var(--text);color:var(--bg);border-color:var(--text)}.hero{padding:104px 0 76px;max-width:850px}.eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--mint);font-size:.82rem;font-weight:700;letter-spacing:.04em}.dot{width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 16px var(--mint)}h1{font-size:clamp(2.6rem,7vw,5.5rem);line-height:1.17;letter-spacing:-.055em;margin:22px 0 20px;font-weight:800}.hero p{font-size:clamp(1rem,2vw,1.2rem);color:var(--muted);max-width:720px;margin:0}.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid var(--line);padding:12px 18px;border-radius:12px;font-weight:700;font-size:.9rem;transition:transform .2s,border-color .2s}.btn:hover{transform:translateY(-2px);border-color:var(--accent)}.btn.primary{background:var(--accent);color:#0b1020;border-color:var(--accent)}.section{padding:58px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:26px}.kicker{color:var(--mint);font:700 .75rem "DM Sans",sans-serif;letter-spacing:.14em;text-transform:uppercase}.section h2{font-size:clamp(1.7rem,4vw,2.5rem);line-height:1.3;margin:8px 0 0;letter-spacing:-.03em}.section-intro{color:var(--muted);max-width:570px;margin:0}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.project{padding:26px;background:linear-gradient(145deg,rgba(255,255,255,.035),transparent 70%),var(--panel);border:1px solid var(--line);border-radius:18px;min-height:245px;display:flex;flex-direction:column;transition:transform .2s,border-color .2s}.project:hover{transform:translateY(-4px);border-color:rgba(139,156,255,.5)}.project-top{display:flex;justify-content:space-between;align-items:center;gap:12px}.project-icon{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:rgba(139,156,255,.12);color:var(--accent);font:700 1rem "DM Sans",sans-serif}.tag{font-size:.72rem;color:var(--mint);border:1px solid rgba(117,224,193,.22);background:rgba(117,224,193,.06);padding:4px 9px;border-radius:99px}.project h3{font-size:1.25rem;margin:18px 0 7px}.project p{color:var(--muted);font-size:.92rem;margin:0 0 22px}.project-link{margin-top:auto;color:var(--accent);font-weight:700;font-size:.86rem;display:inline-flex;gap:8px;align-items:center}.about-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}.panel{padding:28px;background:var(--panel);border:1px solid var(--line);border-radius:18px}.panel p{color:var(--muted);margin:10px 0 0}.focus-list{display:grid;gap:13px;margin-top:17px}.focus-item{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:.9rem}.focus-item:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--mint);flex:none}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.principle{padding:22px;border:1px solid var(--line);border-radius:16px;background:rgba(17,26,45,.7)}.principle h3{margin:0 0 8px;font-size:1rem}.principle p{margin:0;color:var(--muted);font-size:.86rem}.contact{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:32px;border-radius:20px;background:linear-gradient(115deg,rgba(139,156,255,.16),rgba(117,224,193,.07)),var(--panel);border:1px solid var(--line)}.contact h2{margin:0;font-size:1.7rem}.contact p{margin:8px 0 0;color:var(--muted)}footer{padding:34px 0 46px;color:var(--muted);font-size:.82rem;border-top:1px solid var(--line);margin-top:60px}.footer-row{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}.social{display:flex;gap:18px}.social a:hover{color:var(--text)}[hidden]{display:none!important}
    @media(max-width:760px){.navlinks{display:none}.hero{padding:78px 0 56px}.grid,.about-grid{grid-template-columns:1fr}.principles{grid-template-columns:1fr}.section{padding:42px 0}.section-head{display:block}.section-intro{margin-top:12px}.contact{display:block}.contact .btn{margin-top:20px}}
    @media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}
    html[dir="ltr"] body{font-family:"DM Sans","Vazirmatn",sans-serif}html[dir="ltr"] .project-link{flex-direction:row-reverse}html[dir="ltr"] .hero h1{letter-spacing:-.06em}

/* Phase 2: navigation, case studies and responsive refinements. */
.skip-link{position:absolute;inset-inline-start:16px;top:-80px;z-index:30;padding:10px 14px;background:var(--text);color:var(--bg);border-radius:10px}
.skip-link:focus{top:12px}
.menu-toggle{display:none;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:10px;padding:9px 12px;font:inherit;font-size:.85rem;cursor:pointer}
.case-hero{padding:76px 0 38px;max-width:900px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:9px;color:var(--muted);font-size:.85rem;margin-bottom:28px}
.breadcrumb a{color:var(--accent)}
.case-hero h1{font-size:clamp(2.3rem,6vw,4.4rem)}
.case-lead{font-size:clamp(1.05rem,2vw,1.25rem);color:var(--muted);max-width:800px}
.case-meta{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.case-meta span{border:1px solid var(--line);border-radius:99px;padding:5px 11px;color:var(--muted);font-size:.78rem}
.case-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(230px,.7fr);gap:18px;align-items:start}
.case-content{display:grid;gap:16px}
.case-content h2{font-size:1.45rem;margin:0 0 10px}
.case-content p,.case-content li{color:var(--muted)}
.case-content ul{padding-inline-start:22px}
.case-aside{position:sticky;top:96px}
.architecture{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;align-items:stretch;margin:20px 0}
.arch-step{position:relative;min-height:112px;padding:15px;border:1px solid var(--line);border-radius:14px;background:var(--panel2);display:flex;flex-direction:column;justify-content:center;gap:7px;text-align:center}
.arch-step strong{font-size:.95rem}
.arch-step span{font-size:.78rem;color:var(--muted)}
.arch-step:not(:nth-child(3n)):after{content:"←";position:absolute;inset-inline-end:-13px;top:40%;z-index:1;color:var(--mint);font-size:1.1rem}
.architecture-note{font-size:.82rem;color:var(--muted)}
.source-note{padding:15px;border-inline-start:3px solid var(--mint);background:rgba(117,224,193,.06);border-radius:8px;color:var(--muted);font-size:.88rem}
.case-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.case-actions .btn{font-size:.82rem}
@media(max-width:760px){
  .menu-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav{position:relative;flex-wrap:wrap;padding:10px 0}
  .navlinks{display:none;order:4;width:100%;padding:10px 0 14px;flex-direction:column;align-items:stretch;gap:0}
  .navlinks.is-open{display:flex}
  .navlinks a{padding:10px 4px;border-top:1px solid var(--line)}
  .case-layout{grid-template-columns:1fr}
  .case-aside{position:static}
  .architecture{grid-template-columns:1fr}
  .arch-step{min-height:82px}
  .arch-step:not(:last-child):after{content:"↓";inset-inline-end:50%;top:auto;bottom:-17px}
}
@media(min-width:761px){.menu-toggle{display:none}}

/* Technical notes and contribution guidance. */
.article-hero{padding:68px 0 30px;max-width:900px}
.article-hero h1{font-size:clamp(2.1rem,5.5vw,3.8rem)}
.article-lead{font-size:clamp(1.02rem,2vw,1.2rem);color:var(--muted);max-width:820px}
.article-layout{max-width:900px;margin-inline:auto;min-width:0}
.article-body{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;min-width:0}
.article-body > .panel{min-width:0;max-width:100%}
.article-body h2{font-size:1.35rem;margin:0 0 10px}
.article-body p,.article-body li{color:var(--muted)}
.article-body ul,.article-body ol{padding-inline-start:22px}
.article-body pre{direction:ltr;text-align:left;min-width:0;max-width:100%;width:100%;overflow-x:auto;overflow-y:hidden;padding:16px;border:1px solid var(--line);border-radius:12px;background:#080d19;color:#e2e8f0;font: .82rem/1.7 ui-monospace,SFMono-Regular,Consolas,monospace}
.article-body code{overflow-wrap:anywhere}
.article-body a{overflow-wrap:anywhere}
.article-meta{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px;color:var(--muted);font-size:.8rem}
.article-meta span{border:1px solid var(--line);border-radius:99px;padding:5px 10px}
.note-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.note-card{padding:22px;border:1px solid var(--line);border-radius:16px;background:var(--panel);display:flex;flex-direction:column;gap:10px}
.note-card p{color:var(--muted);font-size:.9rem;margin:0}
.note-card a{margin-top:auto;color:var(--accent);font-weight:700;font-size:.86rem}
.contribution-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.contribution-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}
.contribution-links a{color:var(--accent);font-size:.86rem;font-weight:700}
@media(max-width:760px){.note-grid,.contribution-grid{grid-template-columns:1fr}.article-hero{padding:54px 0 24px}}