:root{--bg:#f6f8fb;--surface:#ffffff;--surface-2:#f1f5f9;--text:#0f172a;--text-2:#64748b;--primary:#4f46e5;--primary-600:#4338ca;--primary-soft:#eef2ff;--border:#e2e8f0;--border-strong:#cbd5e1;--success:#059669;--danger:#dc2626;--warning:#d97706;--warning-soft:#fffbeb;--warning-border:#fde68a;--radius:16px;--radius-sm:10px;--radius-lg:24px;--shadow-sm:0 1px 2px rgba(15,23,42,0.06);--shadow-md:0 4px 16px rgba(15,23,42,0.08);--shadow-lg:0 12px 40px rgba(79,70,229,0.14);--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Vazirmatn,Roboto,"Helvetica Neue",Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,monospace}*{box-sizing:border-box;margin:0;padding:0}body,html{height:100%}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}.num{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;unicode-bidi:plaintext}.container{max-width:1080px;margin-inline:auto;padding-inline:20px}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.site-header .container{gap:16px;height:64px}.brand,.site-header .container{display:flex;align-items:center}.brand{gap:10px;font-weight:800;font-size:17px;letter-spacing:-.3px;text-decoration:none;color:var(--text)}.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--primary),#7c3aed);color:#fff;display:grid;place-items:center;font-size:15px;box-shadow:0 4px 12px rgba(79,70,229,.35)}.header-actions{-webkit-margin-start:auto;margin-inline-start:auto;display:flex}.btn,.header-actions{align-items:center;gap:8px}.btn{display:inline-flex;justify-content:center;min-height:44px;padding:10px 20px;border-radius:12px;border:1px solid transparent;font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;text-decoration:none;transition:background .15s ease,box-shadow .15s ease,transform .05s ease}.btn:focus-visible{outline:3px solid rgba(79,70,229,.4);outline-offset:2px}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(79,70,229,.35)}.btn-primary:hover{background:var(--primary-600)}.btn-ghost{background:transparent;color:var(--text-2);border-color:var(--border)}.btn-ghost:hover{background:var(--surface-2);color:var(--text)}.btn-danger{background:#fef2f2;color:var(--danger);border-color:#fecaca}.btn-danger:hover{background:#fee2e2}.btn-sm{min-height:36px;padding:6px 12px;font-size:13px}.btn[disabled]{opacity:.55;cursor:not-allowed}.hero{padding:72px 0 40px;text-align:center}.hero h1{font-size:clamp(30px,5vw,46px);font-weight:800;letter-spacing:-1px;line-height:1.2;max-width:720px;margin-inline:auto}.hero p{margin:16px auto 28px;max-width:560px;color:var(--text-2);font-size:17px}.hero-badges{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:24px}.badge{display:inline-flex;align-items:center;gap:6px;background:var(--primary-soft);color:var(--primary-600);border:1px solid #e0e7ff;border-radius:999px;padding:4px 14px;font-size:13px;font-weight:600}.calc-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:28px;max-width:560px;margin:0 auto 64px}@media (max-width:480px){.calc-card{padding:20px 16px;border-radius:var(--radius)}}.segmented{display:grid;grid-template-columns:1fr 1fr;grid-gap:4px;gap:4px;background:var(--surface-2);border-radius:12px;padding:4px;margin-bottom:20px}.segmented button{border:0;background:transparent;border-radius:9px;padding:9px 12px;font-family:inherit;font-size:14px;font-weight:600;color:var(--text-2);cursor:pointer;min-height:44px;transition:background .15s,color .15s,box-shadow .15s}.segmented button[aria-pressed=true]{background:var(--surface);color:var(--primary);box-shadow:var(--shadow-sm)}.segmented button:focus-visible{outline:3px solid rgba(79,70,229,.4);outline-offset:1px}.mode-hint{text-align:center;font-size:13px;color:var(--text-2);margin:-12px 0 16px;min-height:20px}.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}.chip{border:1px solid var(--border-strong);background:var(--surface);border-radius:999px;padding:8px 18px;font-family:inherit;font-size:14px;font-weight:600;color:var(--text-2);cursor:pointer;min-height:40px;transition:all .15s ease}.chip:hover{border-color:var(--primary);color:var(--primary)}.chip[aria-pressed=true]{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 3px 10px rgba(79,70,229,.35)}.chip:focus-visible{outline:3px solid rgba(79,70,229,.4);outline-offset:2px}.field-label{display:block;font-size:14px;font-weight:700;margin-bottom:8px}.amount-wrap{position:relative;display:flex;align-items:center}.amount-wrap .suffix{position:absolute;inset-inline-end:16px;font-size:13px;font-weight:600;color:var(--text-2);pointer-events:none}.amount-input{width:100%;font-family:inherit;font-size:clamp(20px,4vw,26px);font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;padding:14px 64px 14px 16px;border-radius:14px;border:2px solid var(--border-strong);background:var(--surface);color:var(--text);transition:border-color .15s,box-shadow .15s}[dir=rtl] .amount-input{padding:14px 16px 14px 64px}.amount-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(79,70,229,.12)}.amount-input[aria-invalid=true]{border-color:var(--danger)}.input-error{display:flex;align-items:center;gap:6px;color:var(--danger);font-weight:600;min-height:20px}.hint,.input-error{font-size:13px;margin-top:8px}.hint{color:var(--text-2)}.result{margin-top:24px;border-radius:var(--radius);border:1px solid var(--border);background:linear-gradient(180deg,var(--primary-soft),var(--surface));padding:20px}.result-row{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:8px 0;font-size:15px;color:var(--text-2)}.result-row strong{color:var(--text);font-feature-settings:"tnum";font-variant-numeric:tabular-nums;unicode-bidi:plaintext}.result-total{border-top:2px solid var(--border-strong);margin-top:8px;padding-top:14px;display:flex;justify-content:space-between;align-items:center;gap:16px}.result-total .label{font-size:15px;font-weight:700;color:var(--text)}.result-total .value{font-size:clamp(22px,5vw,30px);font-weight:800;color:var(--primary-600);font-feature-settings:"tnum";font-variant-numeric:tabular-nums;unicode-bidi:plaintext;letter-spacing:-.5px}.result-total .toman{display:block;text-align:end;font-size:13px;font-weight:600;color:var(--text-2);margin-top:2px}.status-pill{display:flex;align-items:center;gap:10px;border-radius:var(--radius-sm);padding:12px 14px;font-size:14px}.status-pill.warn{background:var(--warning-soft);border:1px solid var(--warning-border);color:#92400e}.status-pill.info{background:var(--primary-soft);color:var(--primary-600)}.status-pill.error{background:#fef2f2;border:1px solid #fecaca;color:var(--danger)}.spinner{width:18px;height:18px;border:2.5px solid rgba(79,70,229,.25);border-top:2.5px solid var(--primary);border-radius:50%;animation:spin .8s linear infinite;flex-shrink:0}@keyframes spin{to{transform:rotate(1turn)}}.features{padding:8px 0 72px}.features h2{text-align:center;font-size:26px;font-weight:800;letter-spacing:-.5px;margin-bottom:32px}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:16px;gap:16px}.feature{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm)}.feature .icon{width:40px;height:40px;border-radius:10px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-size:18px;margin-bottom:12px}.feature h3{font-size:15px;font-weight:700;margin-bottom:4px}.feature p,.site-footer{font-size:14px;color:var(--text-2)}.site-footer{border-top:1px solid var(--border);padding:24px 0}.site-footer .container{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}.admin-shell{max-width:960px;margin:40px auto;padding:0 20px}.admin-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:24px;margin-bottom:24px}.admin-card h2{font-size:18px;font-weight:800;margin-bottom:16px}.login-box{max-width:400px;margin:80px auto}.input{width:100%;font-family:inherit;font-size:15px;padding:11px 14px;border-radius:10px;border:2px solid var(--border-strong);background:var(--surface);color:var(--text)}.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(79,70,229,.12)}label{font-size:14px;font-weight:600}.form-row{display:grid;grid-gap:6px;gap:6px;margin-bottom:16px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:14px}th{text-align:start;font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-2);padding:10px 12px;border-bottom:2px solid var(--border);white-space:nowrap}td{padding:12px;border-bottom:1px solid var(--border);vertical-align:middle}tr:last-child td{border-bottom:0}.pill-active{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:700}.pill-active.on{background:#ecfdf5;color:var(--success)}.pill-active.off{background:var(--surface-2);color:var(--text-2)}.alert{border-radius:var(--radius-sm);padding:12px 16px;font-size:14px;font-weight:600;margin-bottom:16px}.alert.error{background:#fef2f2;border:1px solid #fecaca;color:var(--danger)}.alert.success{background:#ecfdf5;color:var(--success);border:1px solid #a7f3d0}.muted{color:var(--text-2);font-size:13px}details.json details,details.json summary{cursor:pointer}details.json pre{background:#0f172a;color:#e2e8f0;padding:12px;border-radius:8px;font-family:var(--mono);font-size:12px;overflow-x:auto;direction:ltr;text-align:left}