:root{--bg:#f3f6fb;--panel:#fff;--text:#0f172a;--muted:#64748b;--line:#e2e8f0;--accent:#2563eb;--accent-d:#1d4ed8;--danger:#b91c1c;--ok:#15803d;
font-family:Vazirmatn,Tahoma,system-ui,-apple-system,"Segoe UI",sans-serif}
@media(prefers-color-scheme:dark){:root{--bg:#0b1220;--panel:#121a2b;--text:#e5e9f2;--muted:#94a3b8;--line:#243049;--accent:#3b82f6;--accent-d:#60a5fa}}
*{box-sizing:border-box}
body{margin:0;min-height:100dvh;background:var(--bg);color:var(--text);line-height:1.7}
.shell{width:min(860px,calc(100vw - 24px));margin:0 auto;padding:20px 0 48px}
.hero{padding:20px 0 12px}.eyebrow{margin:0;color:var(--accent);font-weight:700}
h1{margin:4px 0 8px;font-size:clamp(26px,6vw,40px)}h2{margin:0 0 6px;font-size:18px}
.summary,.hint{color:var(--muted);margin:0 0 12px;font-size:14px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;margin-top:14px}
.head{display:flex;justify-content:space-between;align-items:center;gap:8px}
.grid{display:grid;gap:12px;margin:12px 0}.two{grid-template-columns:repeat(2,1fr)}.three{grid-template-columns:repeat(3,1fr)}
.span-two{grid-column:span 2}
label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted)}
input,select{font:inherit;padding:10px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--text);min-width:0}
input:disabled,select:disabled{opacity:.5}
.toggle{flex-direction:row;align-items:center;gap:8px;color:var(--text)}.toggle input{width:auto}
button{font:inherit;border:0;border-radius:10px;padding:10px 16px;cursor:pointer}
button:disabled{opacity:.5;cursor:wait}
.primary{background:var(--accent);color:#fff}.primary:hover{background:var(--accent-d)}
.secondary{background:var(--line);color:var(--text)}.small{padding:4px 10px;font-size:13px}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.buttons{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.result{color:var(--muted);font-size:14px;word-break:break-word}.result.success{color:var(--ok)}.result.error{color:var(--danger)}
.linkbox{display:flex;gap:8px;align-items:center;margin-top:12px;padding:10px;border:1px dashed var(--accent);border-radius:10px}
.linkbox code{flex:1;overflow-x:auto;white-space:nowrap;text-align:left}
summary{cursor:pointer;font-weight:700}
pre{margin:8px 0 0;min-height:90px;max-height:300px;overflow:auto;padding:10px;border-radius:10px;background:var(--bg);font-size:12px;white-space:pre-wrap}
.hidden{display:none}
@media(max-width:640px){.two,.three{grid-template-columns:1fr}.span-two{grid-column:auto}}