/* PDF Free — "Soft Structuralism": silver light mode, graphite dark mode, coral signal colour. */
:root{
  --bg:#eceef2;--bg-2:#e4e7ec;--surface:#ffffff;--surface-2:#f4f5f8;--shell:rgba(20,24,40,.04);
  --ink:#101217;--ink-2:#4a4f5c;--muted:#878d9b;--line:rgba(20,24,40,.08);--line-2:rgba(20,24,40,.14);
  --brand:#ff4f2e;--brand-2:#ff7a5c;--brand-ink:#ffffff;--mint:#1f9d6b;--accent:#2b5cff;--danger:#d93a2b;
  --glow-1:rgba(255,79,46,.12);--glow-2:rgba(43,92,255,.08);
  --shadow:0 1px 2px rgba(20,24,40,.04),0 30px 60px -30px rgba(20,24,40,.22);
  --hi:inset 0 1px 0 rgba(255,255,255,.95);
  --r:30px;--r-in:24px;
  --ease:cubic-bezier(.32,.72,0,1);
  --font:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --display:"Bricolage Grotesque","Geist",ui-sans-serif,sans-serif;
  --serif:"Bricolage Grotesque",sans-serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0c0d10;--bg-2:#111317;--surface:#15171c;--surface-2:#1b1e24;--shell:rgba(255,255,255,.035);
  --ink:#f3f4f6;--ink-2:#b3b8c3;--muted:#7d8391;--line:rgba(255,255,255,.07);--line-2:rgba(255,255,255,.13);
  --brand:#ff6a4a;--brand-2:#ff9a80;--brand-ink:#170805;--mint:#4fd6a0;--accent:#7d9bff;--danger:#ff7a6b;
  --glow-1:rgba(255,106,74,.14);--glow-2:rgba(125,155,255,.08);
  --shadow:0 30px 70px -30px rgba(0,0,0,.8);--hi:inset 0 1px 0 rgba(255,255,255,.05);color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0c0d10;--bg-2:#111317;--surface:#15171c;--surface-2:#1b1e24;--shell:rgba(255,255,255,.035);
  --ink:#f3f4f6;--ink-2:#b3b8c3;--muted:#7d8391;--line:rgba(255,255,255,.07);--line-2:rgba(255,255,255,.13);
  --brand:#ff6a4a;--brand-2:#ff9a80;--brand-ink:#170805;--mint:#4fd6a0;--accent:#7d9bff;--danger:#ff7a6b;
  --glow-1:rgba(255,106,74,.14);--glow-2:rgba(125,155,255,.08);
  --shadow:0 30px 70px -30px rgba(0,0,0,.8);--hi:inset 0 1px 0 rgba(255,255,255,.05);color-scheme:dark}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font);-webkit-font-smoothing:antialiased;overflow-x:hidden}
/* ambient mesh glow, fixed so it never repaints on scroll */
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(40rem 28rem at 12% -6%,var(--glow-1),transparent 70%),radial-gradient(36rem 26rem at 92% 8%,var(--glow-2),transparent 70%)}
a{color:var(--brand)}
img{max-width:100%}
::selection{background:var(--brand);color:var(--brand-ink)}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
main.wrap{padding-top:96px}

/* ---------- floating island nav ---------- */
.top{position:fixed;top:14px;left:0;right:0;z-index:30;pointer-events:none}
.top .wrap{pointer-events:auto;display:flex;align-items:center;gap:10px;height:58px;max-width:1180px;
  background:color-mix(in srgb,var(--surface) 72%,transparent);backdrop-filter:blur(22px) saturate(1.4);-webkit-backdrop-filter:blur(22px) saturate(1.4);
  border:1px solid var(--line);border-radius:999px;box-shadow:var(--shadow),var(--hi);padding:0 8px 0 20px;margin:0 auto;width:calc(100% - 32px)}
[dir="rtl"] .top .wrap{padding:0 20px 0 8px}
.logo{font:800 1.22rem/1 var(--display);color:var(--ink);text-decoration:none;letter-spacing:-.03em;display:inline-flex;align-items:center;gap:0;direction:ltr;font-family:"Bricolage Grotesque",sans-serif}
.logo::before{content:"";width:18px;height:22px;border-radius:5px;background:var(--brand);box-shadow:5px -4px 0 -1px var(--surface),5px -4px 0 0 var(--ink);margin-right:13px;margin-left:2px}
.logo span{color:var(--brand)}
.nav{display:flex;gap:2px;margin-inline-start:auto;align-items:center}
.nav a{color:var(--ink-2);text-decoration:none;padding:8px 12px;border-radius:999px;font-size:.88rem;transition:background .5s var(--ease),color .5s var(--ease)}
.nav a:hover,.nav a[aria-current="page"]{background:var(--shell);color:var(--ink)}
.tools-bar{display:flex;gap:6px;align-items:center}
.icon-btn{border:1px solid var(--line);background:var(--shell);color:var(--ink);border-radius:999px;width:40px;height:40px;cursor:pointer;font-size:1rem;flex:none;
  display:grid;place-items:center;transition:transform .5s var(--ease),background .5s var(--ease)}
.icon-btn:hover{background:var(--line)}.icon-btn:active{transform:scale(.94)}
.mini-sel{width:auto;min-height:40px;height:40px;padding:0 28px 0 12px;font-size:.82rem;background-color:var(--shell);border:1px solid var(--line);border-radius:999px;
  -webkit-appearance:none;appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 15px) 52%,calc(100% - 10px) 52%;background-size:5px 5px;background-repeat:no-repeat;cursor:pointer}
[dir="rtl"] .mini-sel{padding:0 12px 0 28px;background-position:15px 52%,10px 52%}
.i-sun{display:none}
:root[data-theme="dark"] .i-sun{display:inline}:root[data-theme="dark"] .i-moon{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .i-sun{display:inline}:root:not([data-theme="light"]) .i-moon{display:none}}
/* hamburger morphs into an X */
.menu-btn{display:none;position:relative}
.menu-btn i{position:absolute;left:12px;right:12px;top:50%;height:1.5px;background:var(--ink);border-radius:2px;transition:transform .6s var(--ease)}
.menu-btn i:nth-child(1){transform:translateY(-4px)}.menu-btn i:nth-child(2){transform:translateY(4px)}
.menu-open .menu-btn i:nth-child(1){transform:rotate(45deg)}.menu-open .menu-btn i:nth-child(2){transform:rotate(-45deg)}
@media (max-width:1080px){
  .menu-btn{display:grid}
  .tools-bar{margin-inline-start:auto}
  .nav{position:fixed;inset:0;z-index:-1;flex-direction:column;justify-content:center;align-items:stretch;gap:6px;padding:100px 28px 40px;margin:0;
    background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);
    opacity:0;visibility:hidden;transition:opacity .6s var(--ease),visibility .6s}
  .nav a{font:600 1.7rem/1.2 var(--display);letter-spacing:-.02em;color:var(--ink);padding:12px 4px;border-radius:0;border-bottom:1px solid var(--line);
    transform:translateY(32px);opacity:0;transition:transform .8s var(--ease),opacity .8s var(--ease)}
  .nav a:hover,.nav a[aria-current="page"]{background:none;color:var(--brand-2)}
  /* the pill's backdrop-filter would trap the fixed overlay inside it, so drop it while open */
  .menu-open .top .wrap{backdrop-filter:none;-webkit-backdrop-filter:none;background:var(--surface)}
  .menu-open .nav{opacity:1;visibility:visible}
  .menu-open{overflow:hidden}
  .menu-open .nav a{transform:none;opacity:1}
  .menu-open .nav a:nth-child(2){transition-delay:.05s}.menu-open .nav a:nth-child(3){transition-delay:.1s}.menu-open .nav a:nth-child(4){transition-delay:.15s}
  .menu-open .nav a:nth-child(5){transition-delay:.2s}.menu-open .nav a:nth-child(6){transition-delay:.25s}.menu-open .nav a:nth-child(7){transition-delay:.3s}
  .top .wrap{padding:0 6px 0 16px}[dir="rtl"] .top .wrap{padding:0 16px 0 6px}
}
@media (max-width:520px){.top .wrap{gap:5px}.logo{font-size:1.05rem}.mini-sel{padding:0 20px 0 9px;font-size:.76rem;background-position:calc(100% - 12px) 52%,calc(100% - 7px) 52%}
  [dir="rtl"] .mini-sel{padding:0 9px 0 20px;background-position:12px 52%,7px 52%}#lang-sel{max-width:88px}}

/* ---------- type helpers ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line-2);background:var(--shell);border-radius:999px;padding:5px 12px;
  font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-2);font-weight:500;margin-bottom:22px}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 10px var(--mint)}

/* ---------- hero ---------- */
.hero{padding:72px 0 40px;max-width:920px}
.hero h1{font:800 clamp(2.7rem,7.4vw,5.6rem)/.94 var(--display);letter-spacing:-.05em;margin:0 0 24px}
.hero h1 em{font-style:normal;color:var(--brand);position:relative;white-space:nowrap}
.hero p{color:var(--ink-2);font-size:clamp(1.05rem,2vw,1.2rem);max-width:56ch;margin:0}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:32px}

/* ---------- bento grid of tools (double-bezel cards) ---------- */
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:14px;margin:8px 0 96px}
.card{grid-column:span 4;display:block;background:var(--shell);border:1px solid var(--line);border-radius:var(--r);padding:6px;text-decoration:none;color:var(--ink);
  transition:transform .7s var(--ease),border-color .7s var(--ease)}
.card>.in{height:100%;background:var(--surface);border-radius:var(--r-in);box-shadow:var(--hi);padding:26px;display:flex;flex-direction:column;gap:10px;position:relative;overflow:hidden}
.card:hover{transform:translateY(-4px);border-color:var(--line-2)}
.card .ico{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;color:var(--brand-2);
  background:linear-gradient(160deg,var(--glow-1),transparent);border:1px solid var(--line);margin-bottom:8px}
.card .ico svg{width:24px;height:24px}
.card h3{margin:0;font:600 1.15rem/1.25 var(--display);letter-spacing:-.02em}
.card p{margin:0;color:var(--ink-2);font-size:.93rem}
.card .go{margin-top:auto;padding-top:14px;display:inline-flex;align-items:center;gap:10px;font-size:.85rem;color:var(--ink-2)}
.card .go b{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--shell);border:1px solid var(--line);font-weight:400;
  transition:transform .7s var(--ease),background .7s var(--ease),color .7s var(--ease)}
.card:hover .go b{transform:translate(3px,-2px) scale(1.06);background:var(--brand);color:var(--brand-ink);border-color:transparent}
[dir="rtl"] .card .go b{transform:scaleX(-1)}[dir="rtl"] .card:hover .go b{transform:scaleX(-1) translate(3px,-2px) scale(1.06)}
.grid.bento .card:nth-child(1){grid-column:span 7;grid-row:span 2}
.grid.bento .card:nth-child(1)>.in{background:radial-gradient(30rem 18rem at 100% 0%,var(--glow-1),transparent 60%),radial-gradient(20rem 14rem at 0% 100%,var(--glow-2),transparent 60%),var(--surface);padding:34px}
.grid.bento .card:nth-child(1) h3{font-size:clamp(1.6rem,3vw,2.3rem);letter-spacing:-.035em;max-width:14ch}
.grid.bento .card:nth-child(1) p{font-size:1.02rem;max-width:40ch}
.grid.bento .card:nth-child(1) .ico{width:60px;height:60px;border-radius:20px}
.grid.bento .card:nth-child(2),.grid.bento .card:nth-child(3){grid-column:span 5}
.grid.bento .card:nth-child(4),.grid.bento .card:nth-child(5),.grid.bento .card:nth-child(6){grid-column:span 4}
.grid.guides .card{grid-column:span 6}
@media (max-width:900px){.grid .card,.grid.bento .card:nth-child(n),.grid.guides .card{grid-column:span 6;grid-row:auto}}
@media (max-width:620px){.grid{grid-template-columns:1fr}.grid .card,.grid.bento .card:nth-child(n),.grid.guides .card{grid-column:1/-1}}
.section-h{font:600 clamp(1.6rem,3.4vw,2.4rem)/1.1 var(--display);letter-spacing:-.035em;margin:0 0 22px}

/* ---------- buttons: pill with nested icon ---------- */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:12px;font:600 .95rem var(--font);border:0;border-radius:999px;
  padding:7px 7px 7px 22px;cursor:pointer;background:var(--ink);color:var(--bg);min-height:48px;text-decoration:none;
  transition:transform .6s var(--ease),box-shadow .6s var(--ease)}
.btn::after{content:"↗";width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:color-mix(in srgb,var(--bg) 18%,transparent);
  font-weight:400;transition:transform .6s var(--ease)}
.btn:hover::after{transform:translate(2px,-2px) scale(1.06)}
.btn:active{transform:scale(.98)}
[dir="rtl"] .btn{padding:7px 22px 7px 7px}[dir="rtl"] .btn::after{content:"↖"}
.btn.ghost{background:var(--shell);color:var(--ink);border:1px solid var(--line);padding:7px 18px}
.btn.ghost::after{display:none}
.btn.ghost:hover{border-color:var(--line-2)}

/* ---------- tool page ---------- */
.crumbs{font-size:.82rem;color:var(--muted);padding-top:18px}
.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--ink)}
.tool-head{padding:22px 0 30px;max-width:880px}
.tool-head h1{font:600 clamp(2rem,5vw,3.4rem)/1.02 var(--display);margin:0 0 14px;letter-spacing:-.04em}
.tool-head p{margin:0;color:var(--ink-2);max-width:62ch;font-size:1.05rem}
.tool{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:22px;align-items:start}
@media (max-width:900px){.tool{grid-template-columns:minmax(0,1fr)}}
.panel{background:var(--surface);border-radius:var(--r-in);padding:26px;box-shadow:var(--hi),0 0 0 6px var(--shell),0 0 0 7px var(--line),var(--shadow);margin:7px}
.fields{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px}
.fields .full{grid-column:1/-1}
@media (max-width:340px){.fields{grid-template-columns:minmax(0,1fr)}}
label{display:block;font-size:.78rem;font-weight:500;color:var(--muted);margin-bottom:7px;letter-spacing:.01em}
.field{position:relative}
input,select{width:100%;min-width:0;text-overflow:ellipsis;font:500 1rem var(--font);color:var(--ink);background:var(--surface-2);border:1px solid var(--line);border-radius:14px;padding:12px 14px;min-height:50px;
  font-variant-numeric:tabular-nums;transition:border-color .5s var(--ease),box-shadow .5s var(--ease),background .5s var(--ease)}
input:hover,select:hover{border-color:var(--line-2)}
input:focus,select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--glow-1);background:var(--surface)}
.pre input{padding-inline-start:30px}.post input{padding-inline-end:36px}
.pre::before{content:attr(data-pre);position:absolute;inset-inline-start:14px;bottom:25px;transform:translateY(50%);line-height:1;color:var(--muted);pointer-events:none;font-size:.95rem}
.post::after{content:attr(data-post);position:absolute;inset-inline-end:14px;bottom:25px;transform:translateY(50%);line-height:1;color:var(--muted);pointer-events:none;font-size:.95rem}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
.result-main{position:relative;overflow:hidden;border-radius:20px;padding:24px;margin-bottom:12px;color:#fff;
  background:radial-gradient(22rem 14rem at 100% 0%,rgba(255,214,170,.45),transparent 60%),linear-gradient(135deg,#ff3d1f,#ff6a3d 55%,#ff9a62);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.3),0 24px 50px -24px rgba(255,79,46,.7)}
.result-main .lbl{font-size:.8rem;opacity:.85;letter-spacing:.02em}
.result-main .big{font:600 clamp(2.2rem,6vw,3.3rem)/1.05 var(--display);letter-spacing:-.04em;font-variant-numeric:tabular-nums;margin-top:6px}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.stat{background:var(--surface-2);border:1px solid var(--line);border-radius:16px;padding:13px 15px}
.stat .lbl{font-size:.75rem;color:var(--muted)}
.stat .val{font-weight:600;font-size:1.06rem;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.chart{margin-top:18px}
.chart svg{width:100%;height:auto;display:block}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:.8rem;color:var(--ink-2);margin-top:8px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-inline-end:6px;vertical-align:-1px}
details>summary{cursor:pointer;font-weight:600}
.table-wrap{overflow:auto;margin-top:14px;border:1px solid var(--line);border-radius:16px;max-height:380px}
table{width:100%;border-collapse:collapse;font-size:.86rem;font-variant-numeric:tabular-nums}
th,td{padding:9px 12px;text-align:end;border-bottom:1px solid var(--line);white-space:nowrap}
th:first-child,td:first-child{text-align:start}
tbody tr:last-child td{border-bottom:0}
thead th{position:sticky;top:0;background:var(--surface-2);font-weight:500;color:var(--muted);font-size:.78rem}
.note{font-size:.8rem;color:var(--muted);margin-top:14px}
.err{color:var(--danger);font-size:.86rem;margin-top:10px;min-height:1em}

/* ---------- article ---------- */
.article{max-width:760px;margin:96px auto 0}
.article h2{font:600 clamp(1.5rem,3vw,2rem)/1.15 var(--display);margin:2.4em 0 .6em;letter-spacing:-.03em}
.article>h2:first-child{margin-top:0}
.article h3{font:600 1.08rem/1.3 var(--display);margin:1.6em 0 .4em;letter-spacing:-.01em}
.article p,.article li{color:var(--ink-2);font-size:1.03rem}
.article strong{color:var(--ink);font-weight:600}
.article ol,.article ul{padding-inline-start:1.3em}
.article li{margin:.35em 0}
.formula{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px 20px;font:500 .95rem/1.7 var(--mono);overflow-x:auto;color:var(--ink);
  box-shadow:var(--hi),0 0 0 5px var(--shell);margin:18px 5px}
.example{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:20px 24px;margin:20px 0;box-shadow:var(--hi)}
.example::before{content:"";position:absolute;inset-inline-start:0;top:22px;bottom:22px;width:3px;border-radius:3px;background:linear-gradient(var(--brand),var(--mint))}
.example h3{margin-top:0}
.faq details{border:1px solid var(--line);border-radius:18px;background:var(--surface);margin:8px 0;padding:0 20px;box-shadow:var(--hi);transition:border-color .5s var(--ease)}
.faq details[open]{border-color:var(--line-2)}
.faq summary{padding:18px 28px 18px 0;color:var(--ink);position:relative;list-style:none}
.faq summary::-webkit-details-marker{display:none}
[dir="rtl"] .faq summary{padding:18px 0 18px 28px}
.faq summary::after{content:"+";position:absolute;inset-inline-end:0;top:13px;font-size:1.4rem;font-weight:300;color:var(--muted);transition:transform .6s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin-top:0}
.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;margin:24px 0}
.related .card{grid-column:auto}
.guide h1{font:600 clamp(2rem,5vw,3.2rem)/1.05 var(--display);letter-spacing:-.04em;margin:18px 0 6px}
.article.guide{margin-top:20px}

/* ---------- static pages ---------- */
.page{max-width:760px;margin:0 auto;padding:40px 0 40px}
.page h1{font:600 clamp(2rem,5vw,3rem)/1.05 var(--display);letter-spacing:-.04em;margin:0 0 20px}
.page h2{font:600 1.3rem var(--display);letter-spacing:-.02em;margin-top:2em}
.page p,.page li{color:var(--ink-2)}

/* ---------- trust strip ---------- */
.strip{display:flex;flex-wrap:wrap;gap:8px 22px;color:var(--muted);font-size:.86rem;margin:26px 0 0}
.strip span{display:inline-flex;align-items:center;gap:8px}
.strip span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand-2)}

/* ---------- footer ---------- */
.foot{margin-top:120px;padding:56px 0 40px;color:var(--muted);font-size:.9rem;border-top:1px solid var(--line)}
.foot .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
@media (max-width:700px){.foot .cols{grid-template-columns:1fr}}
.foot a{color:var(--ink-2);text-decoration:none;display:block;padding:4px 0;transition:color .4s var(--ease)}
.foot a:hover{color:var(--ink)}
.foot h4,.foot .fh{color:var(--ink);margin:0 0 10px;font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;font-weight:500}
.foot .logo{display:inline-flex;margin-bottom:6px}

/* ---------- scroll reveal (JS adds .reveal, then .in) ---------- */
.reveal{opacity:0;transform:translateY(20px);filter:blur(4px);transition:opacity .7s var(--ease),transform .7s var(--ease),filter .7s var(--ease)}
.reveal.in{opacity:1;transform:none;filter:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;filter:none;transition:none}html{scroll-behavior:auto}}

/* ---------- Arabic ---------- */
[dir="rtl"]{--font:"Readex Pro","Geist",ui-sans-serif,system-ui,Tahoma,sans-serif;--display:"Readex Pro","Bricolage Grotesque",Tahoma,sans-serif}
[dir="rtl"] body{line-height:1.85}
[dir="rtl"] .hero h1,[dir="rtl"] .tool-head h1,[dir="rtl"] .guide h1,[dir="rtl"] .page h1{letter-spacing:0;line-height:1.3;font-weight:700}
[dir="rtl"] .article h2,[dir="rtl"] .section-h,[dir="rtl"] .card h3,[dir="rtl"] .result-main .big{letter-spacing:0}
[dir="rtl"] .eyebrow{letter-spacing:.02em}
[dir="rtl"] .formula{direction:ltr;text-align:left}


.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
@media print{.top,.foot,.actions,.article,.crumbs,body::before{display:none}main.wrap{padding-top:0}.panel{box-shadow:none}.result-main{color:#000;background:none;border:1px solid #999}}

/* ================= PDF Free components ================= */
/* editorial split hero */
.hero-split{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:40px;align-items:center;padding:64px 0 40px}
.hero-split .hero{padding:0}
.stack{position:relative;height:340px}
.stack .chip{position:absolute;display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:16px 20px;
  box-shadow:var(--shadow),var(--hi);font:600 1rem var(--display);color:var(--ink);text-decoration:none;transition:transform .8s var(--ease)}
.stack .chip svg{width:26px;height:26px;color:var(--brand)}
.stack .chip small{display:block;font:400 .78rem var(--font);color:var(--muted)}
.stack .chip:nth-child(1){top:0;left:8%;transform:rotate(-3deg)}
.stack .chip:nth-child(2){top:92px;left:34%;transform:rotate(2deg)}
.stack .chip:nth-child(3){top:184px;left:2%;transform:rotate(-1deg)}
.stack .chip:nth-child(4){top:262px;left:40%;transform:rotate(3deg)}
.stack .chip:hover{transform:rotate(0) translateY(-4px)}
[dir="rtl"] .stack .chip:nth-child(odd){left:auto;right:8%}[dir="rtl"] .stack .chip:nth-child(even){left:auto;right:34%}
@media (max-width:860px){.hero-split{grid-template-columns:1fr;padding-top:40px}.stack{height:auto;display:grid;gap:10px}
  .stack .chip,.stack .chip:nth-child(n){position:static;transform:none}}

/* workspace */
.work{background:var(--surface);border-radius:var(--r-in);box-shadow:var(--hi),0 0 0 6px var(--shell),0 0 0 7px var(--line),var(--shadow);margin:7px;padding:10px}
.drop{color:var(--ink);font-size:1rem;font-weight:400;letter-spacing:0;margin:0;position:relative;display:grid;place-items:center;text-align:center;gap:10px;min-height:280px;border-radius:20px;padding:36px 20px;cursor:pointer;
  border:1.5px dashed var(--line-2);background:radial-gradient(28rem 16rem at 50% 0%,var(--glow-1),transparent 70%),var(--surface-2);
  transition:border-color .5s var(--ease),background .5s var(--ease),transform .5s var(--ease)}
.drop:hover,.drop.over{border-color:var(--brand)}
.drop.over{transform:scale(.995)}
.drop input{position:absolute;inset:0;opacity:0;cursor:pointer}
.drop .big-ico{width:68px;height:68px;border-radius:22px;display:grid;place-items:center;background:var(--brand);color:var(--brand-ink);box-shadow:0 18px 40px -16px var(--brand)}
.drop .big-ico svg{width:30px;height:30px}
.drop h2{margin:6px 0 0;font:700 clamp(1.3rem,3vw,1.7rem)/1.15 var(--display);letter-spacing:-.03em}
.drop p{margin:0;color:var(--muted);font-size:.9rem}
.drop .pick{display:inline-flex;margin-top:6px;border-radius:999px;padding:10px 20px;background:var(--ink);color:var(--bg);font-weight:600;font-size:.92rem;pointer-events:none}
.safe{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;color:var(--mint)}
.safe::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--mint)}
.queue{padding:14px 10px 6px}
.files{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.files li{display:flex;align-items:center;gap:12px;background:var(--surface-2);border:1px solid var(--line);border-radius:16px;padding:10px 12px}
.files .thumb{width:44px;height:44px;border-radius:10px;flex:none;background:var(--bg-2) center/cover no-repeat;display:grid;place-items:center;font:700 .62rem var(--mono);color:var(--brand);letter-spacing:.05em}
.files .meta{min-width:0;flex:1}
.files .name{font-weight:600;font-size:.92rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.files .size{font-size:.78rem;color:var(--muted);font-variant-numeric:tabular-nums}
.files .ctl{display:flex;gap:4px}
.files .ctl button{width:32px;height:32px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--ink-2);cursor:pointer;font-size:.9rem;transition:background .4s var(--ease)}
.files .ctl button:hover{background:var(--line)}
.files .ctl button:disabled{opacity:.3;cursor:default}
.add-more{margin-top:10px;font-size:.85rem}
.opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-top:18px}
.opts .full{grid-column:1/-1}
input[type=range]{padding:0;min-height:auto;height:6px;border:0;background:var(--line-2);border-radius:6px;accent-color:var(--brand);margin:20px 0 10px}
.range-val{font:600 .9rem var(--mono);color:var(--ink)}
.check{display:flex;align-items:center;gap:10px;font-size:.9rem;color:var(--ink-2);margin:0}
.check input{width:20px;height:20px;min-height:0;accent-color:var(--brand)}
.progress{height:8px;border-radius:8px;background:var(--line);overflow:hidden;margin-top:18px}
.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--brand-2));border-radius:8px;transition:width .35s var(--ease)}
.result{padding:18px 10px 10px}
.result .summary{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.result .pill{background:var(--surface-2);border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:.85rem;font-variant-numeric:tabular-nums}
.result .pill b{color:var(--mint)}
.out{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.out li{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:16px;padding:10px 12px;background:var(--surface-2)}
.out a.dl{margin-inline-start:auto;text-decoration:none;font-weight:600;font-size:.85rem;color:var(--brand)}
textarea{width:100%;min-height:260px;font:1rem/1.6 var(--font);color:var(--ink);background:var(--surface-2);border:1px solid var(--line);border-radius:16px;padding:14px;resize:vertical}
textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--glow-1)}
[hidden]{display:none!important}
.tool-head{padding-bottom:26px}
.card .ico{color:var(--brand)}
.grid.bento .card:nth-child(1)>.in{background:radial-gradient(30rem 18rem at 100% 0%,var(--glow-1),transparent 60%),var(--surface)}
.btn{background:var(--brand);color:var(--brand-ink)}
.btn::after{background:rgba(255,255,255,.22)}

/* reserved ad spaces (3 per page); empty until AdSense is approved */
.ad-slot{display:block;min-height:120px;margin:28px 0;clear:both}
.ad-slot ins{margin:0!important}
@media (min-width:900px){.ad-slot{min-height:100px}}

.foot .fh{font-family:inherit}
.netlist{list-style:none;padding:0;display:grid;gap:12px}.netlist li{padding:14px 16px;border:1px solid var(--line);border-radius:12px}.netlist span{color:var(--ink-2)}.netlist small{color:var(--muted)}

.pbox{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 16px;align-items:center;margin:18px 0 0;padding:16px 18px;border:1px dashed var(--line-2);border-radius:14px;background:var(--surface)}
.pbox p{margin:2px 0 0;color:var(--ink-2)}.pbox-k{font-size:.74rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.pbox small{grid-column:1/-1;color:var(--muted);font-size:.76rem}
@media (max-width:600px){.pbox{grid-template-columns:minmax(0,1fr)}.pbox .btn{justify-self:start}}

/* nav-fit: keep top-bar links on one line */
.nav a{white-space:nowrap}
@media (max-width:1320px){.nav a{padding:8px 9px;font-size:.84rem}}

/* nav-fit: same as the mobile menu, used when the links do not fit */
html.nav-tight .menu-btn{display:grid}
html.nav-tight .tools-bar{margin-inline-start:auto}
html.nav-tight .nav{position:fixed;inset:0;z-index:-1;flex-direction:column;justify-content:center;align-items:stretch;gap:6px;padding:100px 28px 40px;margin:0;
    background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);
    opacity:0;visibility:hidden;transition:opacity .6s var(--ease),visibility .6s}
html.nav-tight .nav a{font:600 1.7rem/1.2 var(--display);letter-spacing:-.02em;color:var(--ink);padding:12px 4px;border-radius:0;border-bottom:1px solid var(--line);
    transform:translateY(32px);opacity:0;transition:transform .8s var(--ease),opacity .8s var(--ease)}
html.nav-tight .nav a:hover,html.nav-tight .nav a[aria-current="page"]{background:none;color:var(--brand-2)}
html.nav-tight /* the pill's backdrop-filter would trap the fixed overlay inside it,html.nav-tight so drop it while open */
  .menu-open .top .wrap{backdrop-filter:none;-webkit-backdrop-filter:none;background:var(--surface)}
html.nav-tight .menu-open .nav{opacity:1;visibility:visible}
html.nav-tight .menu-open{overflow:hidden}
html.nav-tight .menu-open .nav a{transform:none;opacity:1}
html.nav-tight .menu-open .nav a:nth-child(2){transition-delay:.05s}
html.nav-tight .menu-open .nav a:nth-child(3){transition-delay:.1s}
html.nav-tight .menu-open .nav a:nth-child(4){transition-delay:.15s}
html.nav-tight .menu-open .nav a:nth-child(5){transition-delay:.2s}
html.nav-tight .menu-open .nav a:nth-child(6){transition-delay:.25s}
html.nav-tight .menu-open .nav a:nth-child(7){transition-delay:.3s}
html.nav-tight .top .wrap{padding:0 6px 0 16px}
html.nav-tight[dir="rtl"] .top .wrap{padding:0 16px 0 6px}