:root{color-scheme:light;--paper:#f5f1e8;--paper-deep:#eee8dc;--ink:#292821;--muted:#777367;--line:#d9d2c5;--accent:#a34b35;--accent-soft:#e7d7ca;--olive:#68715a;--serif:"Playfair Display", Georgia, serif;--sans:"DM Sans", "Segoe UI", sans-serif;--bengali-serif:"Noto Serif Bengali", "Nirmala UI", serif;--bengali-sans:"Noto Sans Bengali", "Nirmala UI", sans-serif;font-family:var(--sans);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--paper);color:var(--ink);scroll-behavior:smooth}:root[data-theme=dark]{color-scheme:dark;--paper:#24241f;--paper-deep:#2e2d26;--ink:#eee9de;--muted:#aaa596;--line:#49473e;--accent:#dc9476;--accent-soft:#514239;--olive:#bbc49f}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--paper:#24241f;--paper-deep:#2e2d26;--ink:#eee9de;--muted:#aaa596;--line:#49473e;--accent:#dc9476;--accent-soft:#514239;--olive:#bbc49f}}*{box-sizing:border-box}:lang(bn){font-family:var(--bengali-sans), var(--sans);line-height:1.9}:lang(bn) :is(h1,h2,h3){font-family:var(--bengali-serif), var(--serif);line-height:1.5}body{background:var(--paper);color:var(--ink);margin:0;transition:background-color .22s,color .22s}a{color:inherit}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:4px}::selection{background:var(--accent-soft);color:var(--ink)}.site-header{z-index:10;border-bottom:1px solid var(--line);background:color-mix(in srgb, var(--paper) 94%, transparent);backdrop-filter:blur(12px);position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:28px;width:min(1280px,100% - 64px);min-height:76px;margin-inline:auto;display:flex}.wordmark{color:var(--ink);letter-spacing:0;flex-shrink:0;align-items:center;gap:10px;font-size:13px;font-weight:700;text-decoration:none;display:inline-flex}.wordmark-mark{background:var(--accent);width:31px;height:31px;color:var(--paper);font-family:var(--serif);border-radius:50%;place-items:center;font-size:17px;font-weight:600;display:grid}.wordmark-subtitle{color:var(--muted);font-weight:400}.site-nav{align-items:center;gap:clamp(14px,2.2vw,30px);display:flex}.site-nav a,.back-to-top{color:var(--muted);font-size:11px;font-weight:600;text-decoration:none;transition:color .16s}.site-nav a:hover,.back-to-top:hover{color:var(--accent)}.theme-toggle{border:1px solid var(--line);width:38px;height:38px;color:var(--ink);cursor:pointer;background:0 0;border-radius:50%;flex-shrink:0;place-items:center;transition:border-color .16s,background-color .16s;display:grid}.theme-toggle:hover{border-color:var(--accent);background:var(--paper-deep)}.theme-toggle svg{fill:none;stroke:currentColor;stroke-width:1.5px;stroke-linecap:round;stroke-linejoin:round;width:17px;height:17px}.moon-icon,:root[data-theme=dark] .sun-icon{display:none}:root[data-theme=dark] .moon-icon{display:block}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .sun-icon{display:none}:root:not([data-theme=light]) .moon-icon{display:block}}.site-footer{padding:29px max(32px,50% - 560px) 18px}.footer-inner{justify-content:space-between;align-items:center;gap:24px;padding-bottom:24px;display:flex}.footer-inner>p{color:var(--muted);margin:0;font-size:10px}.back-to-top{align-items:center;gap:8px;display:inline-flex}.back-to-top span{color:var(--accent);font-size:14px}.footer-bottom{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;gap:20px;padding-top:14px;font-size:9px;display:flex}@media (width<=900px){.header-inner{gap:18px}.site-nav{gap:15px}.site-nav a{font-size:10px}}@media (width<=700px){.header-inner{grid-template-columns:minmax(0,1fr) auto;gap:0 12px;width:calc(100% - 40px);min-height:auto;padding-top:15px;display:grid}.site-nav{scrollbar-width:none;grid-area:2/1/auto/-1;gap:21px;padding:14px 0 13px;overflow-x:auto}.site-nav::-webkit-scrollbar{display:none}.site-nav a{flex:none;font-size:10px}.theme-toggle{grid-area:1/2}.footer-inner{flex-wrap:wrap;align-items:flex-start}.footer-inner>p{order:3;width:100%}}@media (width<=420px){.header-inner{width:calc(100% - 32px)}.wordmark-subtitle{display:none}.footer-bottom{flex-wrap:wrap}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}