@font-face{font-family:Vazirmatn;src:url(/fonts/Vazirmatn.woff2) format("woff2");font-style:normal;font-weight:100 900;font-display:swap}:root{--bg: #f2f2f2;--panel: #ffffff;--text: #111111;--muted: #555555;--border: #cfcfcf;--accent: #2b6cb0;--danger: #c53030;--canvas-bg: #ffffff;--canvas-stroke: #111111;--chord-short: rgba(0,0,0,.22);--chord-long: rgba(197,48,48,.4);--hist-bar: rgba(43,108,176,.65);--hist-frame: rgba(0,0,0,.75);--tick: rgba(0,0,0,.55);--shadow: rgba(0,0,0,.08)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Vazirmatn,Tahoma,Arial,sans-serif;text-align:right}.ltr{direction:ltr;unicode-bidi:isolate;display:inline-block}bdi[dir=ltr]{direction:ltr;unicode-bidi:isolate;display:inline-block}.math{display:inline-block;direction:ltr;unicode-bidi:isolate;color:var(--danger);font-weight:800}.tex{display:inline-block;direction:ltr;unicode-bidi:isolate}header{max-width:1200px;margin:0 auto;padding:16px 14px 10px}.headerTop{display:flex;align-items:center;justify-content:space-between;gap:14px;direction:ltr}.logoGroup{flex:0 0 auto;display:flex;align-items:center;gap:12px}.logo{display:inline-block;text-decoration:none;background:transparent;border:none;padding:0;line-height:0}.logo img{width:100px;height:auto;display:block;object-fit:contain;filter:drop-shadow(0 3px 10px rgba(0,0,0,.18))}.headerText{flex:1 1 auto;direction:rtl;min-width:0;padding-top:6px}h1{margin:0;font-family:Vazirmatn,Tahoma,Arial,sans-serif;font-size:28px;font-weight:900;line-height:1.35}.katex{font-size:1.05em}.controls{margin-top:14px;display:flex;flex-wrap:wrap;gap:10px 12px;align-items:center;padding:12px;background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:0 4px 10px var(--shadow)}label{display:inline-flex;align-items:center;gap:8px;font-size:14px;white-space:nowrap}input[type=number]{width:170px;padding:8px 10px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text);outline:none;font-family:inherit;font-size:14px;direction:ltr;unicode-bidi:plaintext}input[type=number]:focus{border-color:var(--accent)}button{padding:9px 14px;border-radius:8px;border:1px solid var(--border);background:var(--panel);color:var(--text);cursor:pointer;font-family:inherit;font-weight:800;font-size:14px}button:hover{border-color:var(--accent)}.hint{flex:1 1 100%;color:var(--muted);font-size:12px;line-height:1.8;margin-top:2px}main{max-width:1200px;margin:12px auto 24px;padding:0 14px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}@media(max-width:1000px){.grid{grid-template-columns:1fr}}.card{min-width:0;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:10px;box-shadow:0 4px 10px var(--shadow)}.card h2{margin:6px 0 10px;font-size:16px;font-weight:900;text-align:center}.canvWrap{display:flex;flex-direction:column;gap:10px;align-items:center}.histSection{width:100%;display:flex;flex-direction:column;align-items:center;gap:6px}.histCaption{font-size:12px;color:var(--muted);text-align:center}canvas{display:block;border-radius:8px;border:1px solid var(--border);background:var(--canvas-bg)}.stats{margin-top:10px;font-size:13px;line-height:1.9;text-align:center}.statsRow{display:flex;justify-content:center;align-items:baseline;gap:28px;flex-wrap:wrap}.statsRowInner{gap:18px;margin-top:6px}.statItem{display:inline-flex;align-items:baseline;gap:8px;white-space:nowrap}.statLabel{color:var(--muted);font-weight:800}footer{max-width:1200px;margin:0 auto;padding:0 14px 18px;color:var(--muted);font-size:12px;line-height:1.9;text-align:center}@media(max-width:560px){.headerTop{direction:rtl;flex-direction:column;align-items:flex-start}.headerText{padding-top:0}.logo img{width:88px}h1{font-size:24px}}