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+ 1rem);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;max-width:100vw;overflow-x:clip}body{font-family:var(--font-body);color:var(--color-ink);background-color:var(--color-paper);max-width:100vw;min-height:100dvh;font-size:1rem;line-height:1.6;overflow-x:clip}h1,h2,h3,h4,h5,h6{letter-spacing:-.02em;line-height:1.1}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}button{cursor:pointer;background:0 0;border:none;font-family:inherit}:lang(bn),[lang=bn],.font-bengali,.lang-bn{font-family:var(--font-bengali-body)}:lang(bn) h1,:lang(bn) h2,:lang(bn) h3,:lang(bn) h4,[lang=bn] h1,[lang=bn] h2,[lang=bn] h3,[lang=bn] h4{font-family:var(--font-bengali-display)}.section-shell{max-width:var(--max-width);padding:var(--space-20) var(--space-6);margin:0 auto}@media (max-width:640px){.section-shell{padding:var(--space-16) var(--space-4)}}.section-kicker{align-items:center;gap:var(--space-2);text-transform:uppercase;letter-spacing:.08em;color:var(--color-ink-3);font-size:.75rem;font-weight:600;display:inline-flex}.section-index{min-width:1.75rem;height:1.75rem;padding:0 var(--space-2);border-radius:var(--radius-full);background:var(--color-paper-3);color:var(--color-ink-2);justify-content:center;align-items:center;font-size:.6875rem;font-weight:700;display:inline-flex}.section-headline{font-family:var(--font-body);color:var(--color-ink);margin-top:var(--space-4);font-size:clamp(1.75rem,4vw,2.75rem);font-weight:700}.section-headline .serif-accent{font-family:var(--font-display);color:var(--brand-strong);font-weight:800}.btn{justify-content:center;align-items:center;gap:var(--space-2);border-radius:var(--radius-xl);letter-spacing:.04em;text-transform:uppercase;white-space:nowrap;cursor:pointer;-webkit-user-select:none;user-select:none;border:none;padding:.85rem 1.85rem;font-size:.9375rem;font-weight:700;transition:all .1s cubic-bezier(.34,1.56,.64,1);display:inline-flex}.btn:active{transform:translateY(4px)}.btn-primary{background:var(--brand);color:#fff;box-shadow:0 4px 0 var(--brand-shadow)}.btn-primary:hover{background:var(--brand);box-shadow:0 6px 0 var(--brand-shadow);transform:translateY(-2px)}.btn-primary:active{transform:translateY(4px);box-shadow:0 0 #0000}.btn-secondary{background:var(--color-card,#fff);color:var(--color-ink,#0f172a);border:2px solid var(--color-line,#e2e8f0);box-shadow:0 4px 0 var(--color-line-2,#cbd5e1)}.btn-secondary:hover{border-color:var(--color-line-2,#cbd5e1);box-shadow:0 6px 0 var(--color-line-2,#cbd5e1);background:var(--color-paper-2,#f8fafc);transform:translateY(-2px)}.btn-secondary:active{transform:translateY(4px);box-shadow:0 0 #0000}.card{border-radius:var(--radius-2xl);border:1.5px solid var(--dash-card-border,#e2e8f0);background:var(--dash-card-bg,#fff);transition:border-color .15s,box-shadow .15s;box-shadow:0 1px 3px #0f172a0a}.card:hover{border-color:var(--dash-card-border-hover,#cbd5e1);box-shadow:0 2px 6px #0f172a0f}.card:active{transform:none}[data-tactile],.tactile-3d{transition:all .12s cubic-bezier(.34,1.56,.64,1)}[data-tactile]:active,.tactile-3d:active{transform:translateY(3px)!important}.dot{border-radius:var(--radius-full);background:var(--color-brand);width:.375rem;height:.375rem;display:inline-block}.reveal{opacity:0;transition:opacity .6s var(--ease-out), transform .6s var(--ease-out);transform:translateY(24px)}.reveal.revealed{opacity:1;transform:translateY(0)}.graph-paper{background-image:linear-gradient(#e2e8f080 1px,#0000 1px),linear-gradient(90deg,#e2e8f080 1px,#0000 1px);background-size:40px 40px}.tnum{font-variant-numeric:tabular-nums}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@keyframes smoothShimmerWave{0%{background-position:-200% 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