/* Layout: one working tool up top (drop zone + settings), then the page's guide, a reference table and FAQ. */
:root{
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --ink:#0E1B33;
  --muted:#5A6782;
  --line:#DDE4F0;
  --accent:#1F5FD6;
  --accent-ink:#FFFFFF;
  --accent-soft:#E7EFFE;
  --ok:#14804A;
  --ok-soft:#E3F5EB;
  --warn:#B4540A;
  --warn-soft:#FDF0E2;
  --font-ui:"Figtree", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-ar:"IBM Plex Sans Arabic", "Figtree", system-ui, sans-serif;
  --font-num:"IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --r:14px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0B1220;--surface:#121B2E;--ink:#E8EEF9;--muted:#9AA8C2;--line:#24314A;
    --accent:#5B8EF0;--accent-ink:#0B1220;--accent-soft:#18284A;
    --ok:#4CC488;--ok-soft:#123326;--warn:#F0A35B;--warn-soft:#3A2614;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0B1220;--surface:#121B2E;--ink:#E8EEF9;--muted:#9AA8C2;--line:#24314A;
  --accent:#5B8EF0;--accent-ink:#0B1220;--accent-soft:#18284A;
  --ok:#4CC488;--ok-soft:#123326;--warn:#F0A35B;--warn-soft:#3A2614;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:16px/1.6 var(--font-ui);-webkit-font-smoothing:antialiased}
[dir="rtl"] body,[dir="rtl"] button,[dir="rtl"] input,[dir="rtl"] select{font-family:var(--font-ar)}
[hidden]{display:none!important}
img{max-width:100%;display:block}
.wrap{max-width:1040px;margin:0 auto;padding-inline:20px}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

/* header */
header.top{padding-block:16px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.02em;color:var(--ink);text-decoration:none}
.brand-mark{width:28px;height:28px;border-radius:8px;background:var(--accent);display:grid;place-items:center}
.brand-mark svg{width:16px;height:16px}
.nav{display:flex;align-items:center;gap:18px;margin-inline-start:auto}
.nav a{color:var(--muted);text-decoration:none;font-weight:600;font-size:15px}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink)}
@media (max-width:700px){.nav{display:none}}
.lang{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:7px 14px;font:600 14px var(--font-ui);cursor:pointer;flex-shrink:0}
.lang span{font-family:var(--font-ar)}

/* hero */
.hero{padding-block:24px 20px;max-width:700px}
.hero h1{font-size:clamp(30px,5vw,44px);line-height:1.1;letter-spacing:-.03em;margin:0 0 12px;font-weight:800;text-wrap:balance}
[dir="rtl"] .hero h1{letter-spacing:0;line-height:1.35}
.hero p{margin:0;color:var(--muted);font-size:17px;max-width:60ch}
.private{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:14px;color:var(--ok);background:var(--ok-soft);padding:6px 12px;border-radius:999px;font-weight:600}

/* tool */
.tool{display:grid;grid-template-columns:1.15fr 1fr;gap:18px;padding-block:8px 36px;align-items:start}
@media (max-width:820px){.tool{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;min-width:0}
.drop{border:2px dashed var(--line);border-radius:12px;min-height:280px;display:grid;place-items:center;text-align:center;padding:24px;cursor:pointer;transition:border-color .15s,background .15s;position:relative}
.drop:hover,.drop.over{border-color:var(--accent);background:var(--accent-soft)}
.drop-icon{width:48px;height:48px;border-radius:12px;background:var(--accent-soft);display:grid;place-items:center;margin:0 auto 12px;color:var(--accent)}
.drop strong{display:block;font-size:18px;margin-bottom:4px}
.drop small{color:var(--muted);font-size:14px}
.sample{background:none;border:0;color:var(--accent);font-weight:600;font-size:14px;font-family:inherit;cursor:pointer;margin-top:10px;text-decoration:underline;text-underline-offset:3px}
#file{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.loaded{display:flex;flex-direction:column;gap:14px}
.thumb{background:repeating-conic-gradient(var(--line) 0 25%,transparent 0 50%) 0 0/16px 16px;border-radius:10px;overflow:hidden;display:grid;place-items:center;max-height:340px}
.thumb img{max-height:340px;object-fit:contain}
.fileline{display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:14px;color:var(--muted)}
.fileline b{color:var(--ink);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.ghost{background:none;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:6px 12px;font-weight:600;font-size:13px;font-family:inherit;cursor:pointer;flex-shrink:0}
.settings{display:flex;flex-direction:column;gap:16px}
.label{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:8px;display:block}
[dir="rtl"] .label{letter-spacing:0;font-size:13px}
.presets{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:7px 13px;font-weight:500;font-size:14px;font-family:inherit;cursor:pointer}
.chip[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}
@media (max-width:420px){.row{grid-template-columns:1fr 1fr}}
.field{display:flex;flex-direction:column;gap:4px;min-width:0}
.field label{font-size:13px;color:var(--muted)}
.field input,.field select{width:100%;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:8px;padding:9px 10px;font:500 15px var(--font-num)}
.field select{font-family:inherit}
.hint{font-size:13px;color:var(--muted);margin:0;background:var(--accent-soft);padding:10px 12px;border-radius:8px}
.go{background:var(--accent);color:var(--accent-ink);border:0;border-radius:10px;padding:14px;font-weight:700;font-size:16px;font-family:inherit;cursor:pointer;width:100%}
.go:disabled{opacity:.45;cursor:not-allowed}
.result{display:flex;flex-direction:column;gap:12px;border-top:1px solid var(--line);padding-top:16px}
.status{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px;padding:8px 12px;border-radius:8px}
.status.ok{color:var(--ok);background:var(--ok-soft)}
.status.warn{color:var(--warn);background:var(--warn-soft)}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.stat{background:var(--bg);border-radius:8px;padding:10px;min-width:0}
.stat span{display:block;font-size:12px;color:var(--muted)}
.stat b{font:500 16px var(--font-num);font-variant-numeric:tabular-nums}
.meter{height:8px;background:var(--bg);border-radius:99px;overflow:hidden;border:1px solid var(--line)}
.meter i{display:block;height:100%;background:var(--ok);border-radius:99px;transition:width .4s}
.meter.over i{background:var(--warn)}
.dl{display:block;text-align:center;background:var(--ok);color:#fff;border-radius:10px;padding:13px;font-weight:700;text-decoration:none}
.busy{color:var(--muted);font-size:14px}

/* content sections */
section.ref{padding-block:28px;border-top:1px solid var(--line)}
section.ref h2{font-size:24px;letter-spacing:-.02em;margin:0 0 10px;text-wrap:balance}
.prose{max-width:68ch}
.prose p,.prose li{color:var(--ink)}
.prose p{margin:0 0 14px}
.prose ol,.prose ul{padding-inline-start:22px;margin:0 0 14px}
.prose li{margin-bottom:6px}
.muted{color:var(--muted)}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--surface);margin-top:14px}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:15px}
th,td{padding:11px 14px;text-align:start;border-bottom:1px solid var(--line)}
th{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:700}
tr:last-child td{border-bottom:0}
td.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
.faq{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px}
.faq h3{font-size:17px;margin:0 0 4px}
.faq p{margin:0;color:var(--muted);font-size:15px}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;margin-top:12px}
.tools-grid a{display:block;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--surface);text-decoration:none;color:var(--ink);font-weight:600}
.tools-grid a span{display:block;font-weight:400;font-size:13px;color:var(--muted)}
.tools-grid a:hover{border-color:var(--accent)}

/* plain pages (privacy, about, contact) */
.doc{padding-block:24px 48px}
.doc h1{font-size:clamp(28px,4vw,38px);letter-spacing:-.02em;margin:0 0 8px}
.doc h2{font-size:20px;margin:28px 0 8px}
.copybox{display:flex;flex-wrap:wrap;gap:10px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:8px 0 16px}
.copybox code{font:500 16px var(--font-num);user-select:all;overflow-wrap:anywhere;min-width:0}

footer{padding-block:28px;color:var(--muted);font-size:14px;border-top:1px solid var(--line)}
.foot{display:flex;flex-wrap:wrap;gap:20px 40px;justify-content:space-between}
.foot nav{display:flex;flex-wrap:wrap;gap:8px 18px}
.foot a{color:var(--muted)}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}