/* mrzroot project site · shared stylesheet (logical properties: RTL and LTR share one layout) */
@font-face{font-family:'Inter';font-style:normal;font-weight:400 700;font-display:swap;src:url(fonts/inter-400-700-latin.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400 700;font-display:swap;src:url(fonts/jetbrains-mono-400-700-latin.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Vazirmatn';font-style:normal;font-weight:400 800;font-display:swap;src:url(fonts/vazirmatn-400-800-arabic.woff2) format('woff2');unicode-range:U+0600-06FF,U+0750-077F,U+0870-088E,U+0890-0891,U+0898-08E1,U+08E3-08FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE70-FE74,U+FE76-FEFC}
@font-face{font-family:'Vazirmatn';font-style:normal;font-weight:400 800;font-display:swap;src:url(fonts/vazirmatn-400-800-latin.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
:root,[data-theme=dark]{--bg:#070b1a;--bg2:#0b1124;--surface:#0e1428;--surface2:#121a33;--line:rgba(170,190,255,.10);--line2:rgba(170,190,255,.18);--text:#eceff7;--text2:#a9b1cc;--text3:#8a93b2;--accent:var(--p-dark);--accent-fg:var(--p-dark);--accent-ink:#06121a;--gold:#e8b04b;--ok:#6fe0a0;--err:#f29a8e;--warn:#e8b04b;--term:#080d1d;--term-line:rgba(170,190,255,.14);--glow:var(--p-glow);color-scheme:dark}
[data-theme=light]{--bg:#f7f5ef;--bg2:#efece3;--surface:#ffffff;--surface2:#fbfaf6;--line:rgba(20,30,60,.11);--line2:rgba(20,30,60,.2);--text:#10162b;--text2:#434b68;--text3:#5b6482;--accent:var(--p-light-bg);--accent-fg:var(--p-light);--accent-ink:#ffffff;--gold:#8a5c0c;--ok:#0b7a46;--err:#b4402f;--warn:#8a5c0c;--term:#0e1428;--term-line:rgba(170,190,255,.18);--glow:var(--p-glow-l);color-scheme:light}
body.p-whystuck{--p-dark:#f0be5e;--p-light:#8a5a05;--p-light-bg:#b97a0a;--p-glow:rgba(240,190,94,.10);--p-glow-l:rgba(185,122,10,.10)}
body.p-shellparity{--p-dark:#d0a03f;--p-light:#6e3c0a;--p-light-bg:#76400a;--p-glow:rgba(208,160,63,.10);--p-glow-l:rgba(118,64,10,.10)}
body.p-whystale{--p-dark:#f29a8e;--p-light:#a8392a;--p-light-bg:#b4402f;--p-glow:rgba(242,154,142,.10);--p-glow-l:rgba(180,64,47,.09)}
body[class*="p-"]{--accent:var(--p-dark);--accent-fg:var(--p-dark);--glow:var(--p-glow)}
[data-theme=light] body[class*="p-"]{--accent:var(--p-light-bg);--accent-fg:var(--p-light);--glow:var(--p-glow-l)}
html[lang=en] .brand .fa-name{display:none}
.findings,.tl,.steps,.limits{grid-template-columns:minmax(0,1fr)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--bg);color:var(--text);font:400 1rem/1.65 'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;overflow-x:hidden;background-image:radial-gradient(60% 40% at 80% -5%,var(--glow),transparent 70%),radial-gradient(50% 35% at 0% 30%,var(--glow),transparent 70%)}
html[lang=fa] body{font-family:'Vazirmatn','Inter',system-ui,sans-serif;line-height:1.95}
a{color:var(--accent-fg);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--accent-fg);outline-offset:3px;border-radius:4px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;inset-inline-start:12px;top:-60px;z-index:100;background:var(--accent);color:var(--accent-ink);padding:10px 16px;border-radius:10px;font-weight:600}.skip:focus{top:12px}
html:not([lang=fa]) .l-fa,html[lang=fa] .l-en{display:none!important}
.mono,code,pre{font-family:'JetBrains Mono',ui-monospace,Menlo,Consolas,monospace}
.wrap{width:min(1120px,100% - 2*clamp(18px,4vw,40px));margin-inline:auto}
/* header */
.top{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-block-end:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:14px;min-height:62px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:700;letter-spacing:-.02em}
.brand svg{width:28px;height:28px;flex:none;color:var(--accent-fg)}.brand .fa-name{font-weight:600;color:var(--text2);font-size:.9em}
.nav{display:flex;gap:2px;margin-inline:auto;padding:4px;border-radius:999px;background:color-mix(in srgb,var(--text) 4%,transparent);box-shadow:inset 0 0 0 1px var(--line)}
.nav a{padding:6px 14px;border-radius:999px;color:var(--text2);text-decoration:none;font-size:.9rem;font-weight:500;white-space:nowrap}.nav a:hover{color:var(--text);background:color-mix(in srgb,var(--text) 7%,transparent)}
.nav .nav-gh,.nav .nav-home{display:none}
.tools{display:flex;gap:6px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:0 16px;border-radius:12px;border:0;font:600 .92rem/1 inherit;font-family:inherit;color:var(--text);background:color-mix(in srgb,var(--text) 6%,transparent);box-shadow:inset 0 0 0 1px var(--line2);text-decoration:none;cursor:pointer;transition:background .2s,transform .2s}
.btn:hover{background:color-mix(in srgb,var(--text) 11%,transparent);text-decoration:none}
.btn.pri{background:var(--accent);color:var(--accent-ink);box-shadow:none}.btn.pri:hover{filter:brightness(1.08);background:var(--accent)}
.btn svg{width:18px;height:18px;flex:none}
.btn.icon{width:40px;padding:0;justify-content:center}
.tog{min-width:40px}.tog .t-moon{display:none}[data-theme=dark] .tog .t-sun{display:none}[data-theme=dark] .tog .t-moon{display:block}
.menu-btn{display:none}
@media(max-width:900px){.nav{position:fixed;inset:62px 0 auto;margin:0;border-radius:0;flex-direction:column;padding:12px 20px 20px;background:var(--bg);box-shadow:0 1px 0 var(--line),0 30px 50px rgba(0,0,0,.35);opacity:0;visibility:hidden;transform:translateY(-8px);transition:.25s}
 .menu-open .nav{opacity:1;visibility:visible;transform:none}.nav a{padding:15px 4px;font-size:1.15rem;border-radius:0;border-block-end:1px solid var(--line)}.nav .nav-gh{display:flex;align-items:center;gap:10px}.nav .nav-home{display:block}.nav .nav-gh svg{width:20px;height:20px}
 .menu-btn{display:inline-flex}.top .wrap{gap:8px}.brand{margin-inline-end:auto}.hd-gh .t{display:none}.hd-gh{width:40px;padding:0;justify-content:center}}
@media(max-width:380px){.hd-gh{display:none}}
/* hero */
.hero{padding:clamp(40px,7vw,90px) 0 clamp(30px,5vw,60px)}
.kicker{display:inline-flex;gap:10px;align-items:center;font-size:.8rem;font-weight:600;letter-spacing:.04em;color:var(--accent-fg);text-transform:uppercase;margin:0 0 18px}
html[lang=fa] .kicker{letter-spacing:0;text-transform:none;font-size:.9rem}
.kicker i{width:8px;height:8px;border-radius:50%;background:var(--accent-fg);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent-fg) 22%,transparent)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:center}
@media(max-width:960px){.hero-grid{grid-template-columns:minmax(0,1fr)}}
h1{font-size:clamp(2.3rem,1.4rem + 4.4vw,4.6rem);line-height:1.02;letter-spacing:-.045em;font-weight:700;margin:0 0 20px}
html[lang=fa] h1{line-height:1.3;letter-spacing:-.01em;font-weight:800}
h1 em{font-style:normal;color:var(--accent-fg)}
.lede{font-size:clamp(1.05rem,.95rem + .5vw,1.28rem);color:var(--text2);max-width:60ch;margin:0 0 26px}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-block-end:22px}
.emblem{display:flex;align-items:center;gap:14px;color:var(--text3);font-size:.85rem;margin-block-start:6px}
.emblem canvas{width:96px;height:96px;flex:none;border-radius:20px;background:radial-gradient(60% 60% at 50% 50%,var(--glow),transparent 72%);box-shadow:inset 0 0 0 1px var(--line)}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.badges li{font:600 .76rem/1 'JetBrains Mono',monospace;padding:7px 10px;border-radius:8px;background:color-mix(in srgb,var(--text) 5%,transparent);box-shadow:inset 0 0 0 1px var(--line);color:var(--text2)}
/* terminal */
.term{background:var(--term);color:#eceff7;border-radius:16px;box-shadow:0 0 0 1px var(--term-line),0 30px 60px -30px rgba(0,0,0,.6);overflow:hidden;direction:ltr;text-align:left}
.term-bar{display:flex;align-items:center;gap:8px;padding:10px 14px;border-block-end:1px solid var(--term-line);font:500 .76rem 'JetBrains Mono',monospace;color:#8a93b2}
.term-bar i{width:10px;height:10px;border-radius:50%;background:#2a3358}.term-bar span{margin-inline-start:8px}.term-bar b{margin-inline-start:auto;font-weight:500;color:var(--accent-fg)}
.term pre{margin:0;padding:16px 18px;font-size:.8rem;line-height:1.55;overflow-x:auto;white-space:pre;color:#d7dcf0;tab-size:4}
.term pre .c-dim{color:#7e88ab}.term pre .c-err{color:#f29a8e}.term pre .c-ok{color:#6fe0a0}.term pre .c-warn{color:#f0be5e}.term pre .c-acc{color:var(--p-dark)}.term pre .c-cmd{color:#fff;font-weight:600}
.term pre.hero-pre{min-height:19.2em;max-height:19.2em;overflow:hidden}
.caret{display:inline-block;width:.55em;height:1.05em;background:#eceff7;vertical-align:-.15em;margin-inline-start:1px;animation:blink 1s steps(2) infinite}@keyframes blink{50%{opacity:0}}
/* sections */
section{padding:clamp(44px,6vw,84px) 0;border-block-start:1px solid var(--line)}
.label{font:600 .78rem 'JetBrains Mono',monospace;color:var(--accent-fg);margin:0 0 10px;letter-spacing:.05em;text-transform:uppercase}html[lang=fa] .label{letter-spacing:0;text-transform:none;font-size:.9rem;font-family:inherit}
h2{font-size:clamp(1.7rem,1.2rem + 2.2vw,2.9rem);line-height:1.1;letter-spacing:-.035em;margin:0 0 18px;font-weight:700}html[lang=fa] h2{line-height:1.35;letter-spacing:-.01em;font-weight:800}
h3{font-size:1.1rem;margin:0 0 8px;letter-spacing:-.01em}
.sec-sub{color:var(--text2);max-width:70ch;margin:0 0 28px}
.card{background:var(--surface);border-radius:16px;box-shadow:inset 0 0 0 1px var(--line);padding:22px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(3,minmax(0,1fr))}@media(max-width:900px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.grid{grid-template-columns:minmax(0,1fr)}}
.feat .n{font:600 .75rem 'JetBrains Mono',monospace;color:var(--accent-fg);display:block;margin-block-end:10px}.feat p{margin:0;color:var(--text2);font-size:.96rem}
.problem{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(20px,4vw,48px)}@media(max-width:800px){.problem{grid-template-columns:minmax(0,1fr)}}
.problem p{margin:0;color:var(--text2)}
.kpis{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:28px 0 0;padding:0;list-style:none}@media(max-width:640px){.kpis{grid-template-columns:minmax(0,1fr)}}
.kpis li{background:var(--surface);border-radius:14px;padding:16px 18px;box-shadow:inset 0 0 0 1px var(--line);color:var(--text2);font-size:.9rem}.kpis b{display:block;font-size:2.1rem;line-height:1.1;color:var(--text);letter-spacing:-.04em}
/* demo */
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 14px}
.tab{font:600 .82rem 'JetBrains Mono',monospace;min-height:38px;padding:0 14px;border-radius:10px;border:0;background:color-mix(in srgb,var(--text) 5%,transparent);color:var(--text2);box-shadow:inset 0 0 0 1px var(--line);cursor:pointer}
.tab[aria-selected=true],.tab[aria-pressed=true]{background:var(--accent);color:var(--accent-ink);box-shadow:none}
.demo-desc{color:var(--text2);margin:0 0 12px;font-size:.95rem}
.demo-note{color:var(--text3);font-size:.84rem;margin:12px 0 0}
details.raw{margin-block-start:16px}details.raw summary{cursor:pointer;color:var(--accent-fg);font-weight:600}
details.raw .term pre{max-height:520px;overflow:auto}
/* split (shellparity) */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0;direction:ltr}.split>div+div{border-inline-start:1px solid var(--term-line)}
.split h4{margin:0;padding:10px 16px;font:600 .74rem 'JetBrains Mono',monospace;letter-spacing:.06em;text-transform:uppercase;border-block-end:1px solid var(--term-line)}
.split .h-h{color:#6fe0a0}.split .h-a{color:#f29a8e}
.split ul{margin:0;padding:10px 16px 14px;list-style:none;font:.78rem/1.5 'JetBrains Mono',monospace;color:#d7dcf0}.split li{padding:5px 0;border-block-end:1px dashed rgba(170,190,255,.1);overflow-wrap:anywhere}.split li:last-child{border:0}
.split li small{display:block;color:#7e88ab;font-size:.72rem}.split .bad{color:#f29a8e}.split .good{color:#6fe0a0}
.row-in{animation:rowin .5s both}@keyframes rowin{from{opacity:0;transform:translateY(6px)}}
@media(max-width:560px){.split{grid-template-columns:minmax(0,1fr)}.split>div+div{border-inline-start:0;border-block-start:1px solid var(--term-line)}}
.findings{display:grid;gap:10px}
.finding{background:var(--term);color:#d7dcf0;border-radius:14px;box-shadow:0 0 0 1px var(--term-line);overflow:hidden;direction:ltr;text-align:left}
.finding>button{all:unset;box-sizing:border-box;display:flex;width:100%;gap:12px;align-items:center;padding:12px 16px;cursor:pointer;font:600 .84rem 'JetBrains Mono',monospace}
.finding>button:focus-visible{outline:2px solid var(--accent-fg);outline-offset:-2px}
.sev{font-size:.7rem;padding:3px 7px;border-radius:6px;flex:none}.sev.e{background:rgba(242,154,142,.16);color:#f29a8e}.sev.w{background:rgba(240,190,94,.16);color:#f0be5e}.sev.n{background:rgba(143,180,255,.14);color:#9db8f5}
.finding pre{margin:0;padding:4px 18px 16px;font-size:.76rem;line-height:1.55;overflow-x:auto;white-space:pre;color:#d7dcf0;display:none}.finding[data-open=true] pre{display:block}
.finding>button::after{content:'+';margin-inline-start:auto;color:#8a93b2}.finding[data-open=true]>button::after{content:'−'}
/* timeline (whystale) */
.tl{display:grid;gap:14px;direction:ltr;text-align:left}
.tl-row{background:var(--term);color:#d7dcf0;border-radius:14px;padding:14px 16px;box-shadow:0 0 0 1px var(--term-line)}
.tl-row h4{margin:0 0 4px;font:600 .82rem 'JetBrains Mono',monospace;color:#fff}.tl-row h4 span{color:#f29a8e}
.tl-row p{margin:0 0 10px;font-size:.78rem;color:#9aa4c4;font-family:'JetBrains Mono',monospace;overflow-wrap:anywhere}
.tl-bar{position:relative;height:28px}.tl-bar:before{content:'';position:absolute;inset-inline:0;top:13px;height:2px;background:rgba(170,190,255,.18)}
.tl-bar .seg{position:absolute;top:11px;height:6px;border-radius:3px;background:linear-gradient(90deg,#6fe0a0,#f29a8e);width:0;transition:width 1.1s cubic-bezier(.22,1,.36,1)}
.tl-bar .pt{position:absolute;top:6px;width:16px;height:16px;border-radius:50%;margin-inline-start:-8px;background:var(--term);box-shadow:0 0 0 2px #6fe0a0}.tl-bar .pt.e{box-shadow:0 0 0 2px #f29a8e}
.tl-bar small{position:absolute;top:-8px;font:600 .68rem 'JetBrains Mono',monospace;color:#7e88ab;white-space:nowrap;margin-inline-start:-4px}.tl-bar small.r{top:20px}
.tl-fix{margin-block-start:10px;font:.78rem 'JetBrains Mono',monospace;color:#6fe0a0}
/* install, how, limits, compare, links */
.steps{display:grid;gap:14px;margin:0;padding:0;list-style:none;counter-reset:s}.steps>li{counter-increment:s}
.steps h3{display:flex;align-items:center;gap:10px}.steps h3:before{content:counter(s);display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:var(--accent);color:var(--accent-ink);font:700 .8rem 'JetBrains Mono',monospace;flex:none}
.code{position:relative;direction:ltr;text-align:left}.code pre{margin:0;padding:14px 52px 14px 16px;background:var(--term);color:#d7dcf0;border-radius:14px;box-shadow:0 0 0 1px var(--term-line);overflow-x:auto;font-size:.8rem;line-height:1.6}
.code .cp{position:absolute;top:8px;right:8px;width:34px;height:34px;border-radius:9px;border:0;background:rgba(170,190,255,.1);color:#cfd6ee;cursor:pointer;display:grid;place-items:center}.code .cp:hover{background:rgba(170,190,255,.2)}.code .cp svg{width:17px;height:17px}.code .cp .ok{display:none}.code .cp.done .ok{display:block}.code .cp.done .cpi{display:none}
.how{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr))}@media(max-width:700px){.how{grid-template-columns:minmax(0,1fr)}}
.how p,.limits li{color:var(--text2);margin:0}
.limits{margin:0;padding:0;list-style:none;display:grid;gap:10px}.limits li{padding:14px 18px;border-radius:14px;background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);border-inline-start:3px solid var(--warn)}
.claim{padding:18px 20px;border-radius:16px;background:color-mix(in srgb,var(--accent-fg) 9%,var(--surface));box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent-fg) 30%,transparent);margin:0 0 20px}.claim p{margin:0 0 8px}.claim p:last-child{margin:0;color:var(--text2);font-size:.92rem}
.tbl{width:100%;border-collapse:collapse;font-size:.92rem}.tbl th,.tbl td{text-align:start;padding:12px 14px;border-block-end:1px solid var(--line);vertical-align:top}.tbl th{color:var(--text3);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em}html[lang=fa] .tbl th{text-transform:none;letter-spacing:0;font-size:.85rem}.tbl td:first-child{white-space:nowrap}
@media(max-width:700px){.tbl,.tbl tbody,.tbl tr,.tbl td{display:block}.tbl thead{display:none}.tbl tr{padding:12px 0;border-block-end:1px solid var(--line)}.tbl td{border:0;padding:3px 0}.tbl td:first-child{white-space:normal;font-weight:600}}
.links{display:flex;flex-wrap:wrap;gap:10px}
.faq details{background:var(--surface);border-radius:14px;box-shadow:inset 0 0 0 1px var(--line);padding:4px 18px;margin-block-end:8px}.faq summary{cursor:pointer;padding:12px 0;font-weight:600}.faq details p{margin:0 0 14px;color:var(--text2)}
footer{border-block-start:1px solid var(--line);padding:30px 0 40px;color:var(--text3);font-size:.9rem}footer .wrap{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between}
footer a{color:var(--text2)}
.pp-vis{margin-block-start:10px}

/*mrz-theme-badge*/[data-theme-toggle]{position:relative}
html[data-theme-mode=system] [data-theme-toggle]::after{content:"A";position:absolute;inset-inline-end:-3px;bottom:-3px;min-width:13px;height:13px;padding:0 2px;box-sizing:border-box;border-radius:7px;font:700 8px/13px system-ui,sans-serif;letter-spacing:0;text-align:center;background:#14181f;color:#fff;box-shadow:0 0 0 1px rgba(255,255,255,.55);pointer-events:none}
html[data-theme=dark][data-theme-mode=system] [data-theme-toggle]::after{background:#f3f4f6;color:#14181f;box-shadow:0 0 0 1px rgba(0,0,0,.5)}