/* =====================================================================
   دربني · design-system page (v2) — the spec sheet itself
   Reads the SAME tokens as the app (variables.css), so the documentation
   can never drift from what ships. Layout: a quiet rail + a single reading
   column; specimens live in "benches" that can flip language, direction and
   theme independently of the page.
   ===================================================================== */
body.ds{background:var(--bg);color:var(--fg)}
.ds a{color:inherit}
.ds-shell{display:grid;grid-template-columns:268px minmax(0,1fr);min-height:100vh}

/* ---------- rail ---------- */
.ds-rail{position:sticky;top:0;align-self:start;height:100vh;overflow:auto;padding:22px 18px 28px;border-inline-end:1px solid var(--line);background:var(--surface);scrollbar-width:thin;display:flex;flex-direction:column;gap:18px}
.ds-brand{display:flex;align-items:center;gap:10px}
.ds-brand img{width:38px;height:38px;border-radius:11px}
.ds-brand b{display:block;font-family:var(--font-display);font-size:19px;font-weight:700;line-height:1.1}
.ds-brand small{display:block;font-size:12px;color:var(--muted);margin-top:2px}
.ds-nav{display:flex;flex-direction:column;gap:1px}
.ds-nav h6{margin:14px 10px 4px;font-size:12px;font-weight:600;color:var(--muted)}
.ds-nav a{display:block;padding:7px 10px;border-radius:8px;font-size:14px;font-weight:500;color:var(--fg-2);transition:background-color var(--dur-1) var(--ease),color var(--dur-1) var(--ease)}
.ds-nav a:hover{background:var(--surface-3)}
.ds-nav a.on{background:var(--pri-soft);color:var(--pri-ink);font-weight:600}
.ds-rail-foot{margin-top:auto;display:flex;flex-direction:column;gap:8px}

/* ---------- top bar (mobile only) ---------- */
.ds-top{display:none}

/* ---------- reading column ---------- */
.ds-main{padding:40px clamp(20px,4vw,56px) 120px;max-width:1120px;width:100%}
.ds-sec{padding-top:72px;scroll-margin-top:8px}
.ds-sec:first-of-type{padding-top:8px}
.ds-sec>header{display:grid;gap:10px;margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.ds-sec>header>h2{font-size:clamp(26px,3vw,34px);font-weight:700;line-height:1.25}
.ds-sec>h3{font-size:19px;font-weight:600;margin:40px 0 12px}
.ds-sec h4{font-size:15px;font-weight:600;margin:0 0 8px;color:var(--fg-2)}
.ds-sec>h4{margin:20px 0 8px}
.ds-lead{font-size:17px;line-height:1.8;color:var(--fg-2);max-width:68ch}
.ds-p{max-width:68ch;color:var(--fg-2);line-height:1.8}
.cap{font-size:12.5px;color:var(--muted);line-height:1.5}
.mono{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:12.5px;direction:ltr;unicode-bidi:isolate}
code.k{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:12.5px;background:var(--tint);border-radius:5px;padding:2px 6px;direction:ltr;unicode-bidi:isolate;display:inline-block}
.stack{display:flex;flex-direction:column;gap:12px}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.cols2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.cols3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.cols4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}

/* ---------- hero ---------- */
.ds-hero{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:48px;align-items:center;padding:12px 0 8px}
.ds-hero h1{font-size:clamp(34px,4.6vw,56px);font-weight:700;line-height:1.2;max-width:14ch}
.ds-hero p{margin-top:18px;font-size:18px;line-height:1.8;color:var(--fg-2);max-width:46ch}
.ds-hero .meta{margin-top:22px;display:flex;gap:8px;flex-wrap:wrap}
.ds-hero .meta span{font-size:13px;font-weight:500;color:var(--fg-2);padding:6px 10px;border:1px solid var(--line-2);border-radius:var(--r-tag);background:var(--surface)}
.ds-phones{display:flex;gap:20px}
.pf{width:calc(390px * .56);height:calc(844px * .56);border-radius:26px;overflow:hidden;position:relative;background:var(--surface);border:1px solid var(--line-2);flex:none}
.pf iframe{position:absolute;top:0;left:0;right:auto;width:390px;height:844px;border:0;transform:scale(.56);transform-origin:top left;background:var(--bg)}   /* physical on purpose: an iframe is a fixed 390px device, not text */
.pf-cap{margin-top:8px;text-align:center;font-size:12.5px;color:var(--muted)}

/* ---------- bench: a framed specimen with its own language / direction / theme ---------- */
.bench{border:1px solid var(--line-2);border-radius:var(--r-xl);background:var(--surface);overflow:hidden;margin:14px 0 4px}
.bench>.bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 14px;border-bottom:1px solid var(--line);background:var(--surface-3)}
.bench>.bar .t{font-size:13px;font-weight:600;color:var(--fg-2);margin-inline-end:auto}
.bench .tg2{display:inline-flex;padding:3px;gap:2px;background:var(--tint);border-radius:9px}
.bench .tg2 button{min-height:30px;padding:0 10px;border-radius:7px;font-size:12.5px;font-weight:600;color:var(--muted);transition:background-color var(--dur-1),color var(--dur-1)}
.bench .tg2 button[aria-pressed="true"]{background:var(--surface);color:var(--fg);box-shadow:0 1px 2px rgba(7,26,62,.12)}
.bench>.body{padding:24px;background:var(--bg);color:var(--fg)}
.bench>.body.on-surface{background:var(--surface)}
.bench>.body .grid{display:grid;gap:20px}
.bench .lab{font-size:12px;font-weight:600;color:var(--muted);margin-bottom:8px;display:block}
.bench .cell{display:flex;flex-direction:column;gap:6px;min-width:0}
.bench .wrap{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.bench .phone-slot{width:100%;max-width:390px;margin-inline:auto}
.phone.demo{position:relative;height:640px;width:100%;max-width:340px;border-radius:30px;border:1px solid var(--line-2);overflow:hidden;background:var(--bg);margin-inline:auto}

/* ---------- tables ---------- */
.tw{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface)}
.dt{width:100%;border-collapse:collapse;font-size:14px}
.dt th{text-align:start;font-size:12.5px;font-weight:600;color:var(--muted);padding:10px 14px;border-bottom:1px solid var(--line);background:var(--surface-3);white-space:nowrap}
.dt td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.6}
.dt tr:last-child td{border-bottom:0}
.dt td.m{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:12.5px;direction:ltr;text-align:start;unicode-bidi:isolate;white-space:nowrap}
.ok-t{color:var(--ok-ink);font-weight:600}.no-t{color:var(--bad-ink);font-weight:600}
.ratio{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:12.5px;direction:ltr;unicode-bidi:isolate;display:inline-block}
.dt td.ar{direction:rtl;text-align:start}
.dt td.en{direction:ltr;text-align:start;unicode-bidi:isolate}
.ratio.fail{color:var(--bad-ink);font-weight:600}.ratio.pass{color:var(--ok-ink)}

/* ---------- callouts (full border, no side stripes) ---------- */
.rule{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border:1px solid var(--line-2);border-radius:var(--r-lg);background:var(--surface);font-size:14.5px;line-height:1.7;color:var(--fg-2)}
.rule svg.i{width:20px;height:20px;margin-top:3px;color:var(--info)}
.rule.do{background:var(--ok-soft);border-color:var(--ok-line)} .rule.do svg.i{color:var(--ok-ink)}
.rule.dont{background:var(--bad-soft);border-color:var(--bad-line)} .rule.dont svg.i{color:var(--bad-ink)}
.rule b{color:var(--fg)}
.rules{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}

/* ---------- swatches ---------- */
.sw{border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--surface)}
.sw .chipc{height:76px;display:flex;align-items:flex-end;padding:10px 12px;font-size:13px;font-weight:600}
.sw .info{padding:9px 12px 11px;display:flex;flex-direction:column;gap:2px}
.sw .info b{font-size:13px;font-weight:600;direction:ltr;unicode-bidi:isolate;text-align:start;font-family:ui-monospace,"SF Mono",Menlo,monospace}
.ramp{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line)}
.ramp>div{padding:26px 8px 8px;display:flex;flex-direction:column;gap:2px;font-size:12px}
.ramp b{font-size:13px;font-weight:600}
.ramp small{font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:10.5px;direction:ltr;text-align:start;opacity:.85}

/* ---------- type specimens ---------- */
.tspec{display:grid;grid-template-columns:150px minmax(0,1fr);gap:8px 24px;padding:16px 0;border-bottom:1px solid var(--line);align-items:baseline}
.tspec:last-child{border-bottom:0}
.tspec .lab{font-size:12.5px;color:var(--muted);line-height:1.6}
.tspec .lab b{display:block;color:var(--fg);font-weight:600;font-size:13.5px}
.pairing{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.pairing .p{border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);padding:20px;display:flex;flex-direction:column;gap:10px}
.pairing .big{font-size:64px;line-height:1.1;font-weight:600}
.glyphs{font-size:20px;line-height:1.9;overflow-wrap:anywhere}
.glyphs.run{overflow-wrap:break-word}

/* ---------- foundations ---------- */
.sp-row{display:grid;grid-template-columns:130px 1fr 1.2fr;gap:14px;align-items:center;padding:7px 0;border-bottom:1px solid var(--line)}
.sp-row i{display:block;height:14px;background:var(--pri);border-radius:3px}
.rd{display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.rd i{display:block;width:100%;height:72px;background:var(--pri-soft);border:1.5px solid var(--pri)}
.elev{height:92px;border-radius:var(--r-xl);background:var(--surface);display:grid;place-items:center;font-size:13px;font-weight:600;border:1px solid transparent}
.icons{display:grid;grid-template-columns:repeat(auto-fill,minmax(88px,1fr));gap:8px}
.icons button{display:flex;flex-direction:column;align-items:center;gap:6px;padding:12px 4px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);font-size:11px;color:var(--muted);min-width:0;overflow:hidden;transition:border-color var(--dur-1),background-color var(--dur-1)}
.icons button:hover{border-color:var(--pri);background:var(--pri-tint)}
.icons button span{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.icons svg.i{color:var(--fg)}

/* ---------- motion lab ---------- */
.mlab{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.mcard{border:1px solid var(--line-2);border-radius:var(--r-xl);background:var(--surface);padding:16px;display:flex;flex-direction:column;gap:12px}
.mcard h4{margin:0;font-size:15px;font-weight:600;color:var(--fg)}
.mcard .stage{height:120px;border-radius:var(--r-md);background:var(--bg);border:1px solid var(--line);position:relative;overflow:hidden;display:grid;place-items:center}
.track{position:absolute;inset-inline:16px;top:50%;height:2px;background:var(--line-2);transform:translateY(-50%)}
.ball{position:absolute;inset-inline-start:0;top:50%;width:26px;height:26px;margin-top:-13px;border-radius:50%;background:var(--pri)}
.mcard .play .ball{transform:translateX(var(--run,200px))}
[dir="rtl"] .mcard .play .ball{transform:translateX(calc(var(--run,200px) * -1))}
.stg-item{height:14px;border-radius:5px;background:var(--line-2);margin:4px 18px}
.curve{width:100%;max-height:150px;height:auto;display:block}
.curve path.c{fill:none;stroke:var(--pri);stroke-width:3}
.curve path.g{fill:none;stroke:var(--line-2);stroke-width:1}

/* ---------- misc ---------- */
.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:-1px;margin-inline-end:6px}
pre.code{margin:0;padding:16px;border:1px solid var(--line-2);border-radius:var(--r-lg);background:#08142f;color:#d8e2f7;font-size:12px;line-height:1.65;overflow:auto;max-height:420px;direction:ltr;text-align:left;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;white-space:pre}
.ba{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.ba figure{margin:0;display:flex;flex-direction:column;gap:8px}
.ba img{width:100%;border:1px solid var(--line-2);border-radius:var(--r-lg);background:var(--surface)}
.ba figcaption{font-size:13px;color:var(--muted)}
.finding{display:grid;grid-template-columns:34px minmax(0,1fr) auto;gap:14px;align-items:start;padding:14px 0;border-bottom:1px solid var(--line)}
.finding:last-child{border-bottom:0}
.finding .n{width:34px;height:34px;border-radius:10px;background:var(--tint);display:grid;place-items:center;font-weight:700;font-size:14px}
.finding b{display:block;font-weight:600;margin-bottom:2px}
.finding p{color:var(--fg-2);font-size:14.5px;line-height:1.7}
.sev{font-size:12px;font-weight:600;padding:3px 9px;border-radius:var(--r-tag);white-space:nowrap}
.sev.hi{background:var(--bad-soft);color:var(--bad-ink)}.sev.md{background:var(--warn-soft);color:var(--warn-ink)}.sev.lo{background:var(--info-soft);color:var(--info-ink)}

@media (max-width:1100px){
  .ds-hero{grid-template-columns:1fr}
  .ds-phones{justify-content:flex-start}
  .cols4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .ds-shell{grid-template-columns:1fr}
  .ds-rail{position:fixed;inset:0 auto 0 0;inset-inline-start:0;inset-inline-end:auto;width:min(86vw,300px);height:100dvh;z-index:60;transform:translateX(-102%);transition:transform var(--dur-3) var(--ease-drawer);border-inline-end:1px solid var(--line-2)}
  [dir="rtl"] .ds-rail{transform:translateX(102%);inset-inline-start:auto;inset-inline-end:0;right:0;left:auto}
  body.nav-open .ds-rail{transform:none}
  .ds-top{display:flex;position:sticky;top:0;z-index:30;align-items:center;gap:10px;padding:8px 14px;background:var(--surface);border-bottom:1px solid var(--line)}
  .ds-top b{font-family:var(--font-display);font-size:17px}
  .cols2,.cols3,.pairing,.rules,.ba{grid-template-columns:1fr}
  .tspec{grid-template-columns:1fr}
  .ramp{grid-template-columns:repeat(5,minmax(0,1fr))}
  .sp-row{grid-template-columns:90px 1fr}
  .sp-row .cap{display:none}
}
@media (max-width:520px){
  .ds-main{padding-inline:16px}
  .pf{width:calc(390px * .46);height:calc(844px * .46)}
  .pf iframe{transform:scale(.46)}
}
@media print{.ds-rail,.ds-top{display:none}.ds-shell{display:block}.ds-sec{break-inside:avoid-page}}