@font-face{font-family:SolaimanLipi;src:url(/fonts/SolaimanLipi.ttf)format("truetype");font-weight:400;font-style:normal;font-display:swap}:root{--brand:#12405e;--brand-dark:#0c2e44;--brand-light:#e8f0f6;--accent:#c99a2e;--bg:#f7f9fb;--surface:#fff;--text:#1d2733;--muted:#5c6b7a;--line:#e3e9ef;--danger:#b3261e;--ok:#188038;--radius:12px;--maxw:680px;--nav-h:60px;--shadow:0 2px 10px #12405e14;--font:"SolaimanLipi", "Hind Siliguri", "Noto Sans Bengali", "Vrinda", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{font-family:var(--font);color:var(--text);background:var(--bg);margin:0;line-height:1.7}img{max-width:100%;height:auto}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.skip-link{background:var(--brand);color:#fff;z-index:1000;padding:8px 12px;position:absolute;top:0;left:-9999px}.skip-link:focus{left:0}.site-header{z-index:50;background:var(--brand);color:#fff;box-shadow:var(--shadow);position:sticky;top:0}.header-inner{max-width:var(--maxw);align-items:center;gap:10px;margin:0 auto;padding:10px 16px;display:flex}.brand{display:inline-flex}.brand img{border-radius:8px}.brand-title{color:#fff;letter-spacing:.2px;font-size:1.05rem;font-weight:600}.header-search{color:#fff;border:1px solid #ffffff80;border-radius:999px;margin-left:auto;padding:4px 14px;font-size:.9rem}.header-search:hover{background:#ffffff1f;text-decoration:none}.breadcrumb{background:var(--surface);border-bottom:1px solid var(--line);color:var(--muted);white-space:nowrap;padding:8px 16px;font-size:.82rem;overflow-x:auto}.breadcrumb ol{max-width:var(--maxw);gap:6px;margin:0 auto;padding:0;list-style:none;display:flex}.breadcrumb li[aria-hidden=true]{color:var(--line)}.breadcrumb li[aria-current=page]{color:var(--text);font-weight:500}.content-wrap{max-width:var(--maxw);padding:20px 16px calc(var(--nav-h) + 32px);margin:0 auto}.article{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px}.article h1{color:var(--brand-dark);margin:0 0 8px;font-size:1.6rem;line-height:1.35}.lede{color:var(--muted);margin:0 0 16px;font-size:1rem}.article h2{color:var(--brand);border-bottom:2px solid var(--brand-light);margin:28px 0 10px;padding-bottom:6px;font-size:1.25rem}.article h3{color:var(--brand-dark);margin:20px 0 8px;font-size:1.05rem}.article p{margin:0 0 14px}.article ul,.article ol{margin:0 0 14px;padding-left:22px}.article li{margin-bottom:6px}.article blockquote{border-left:4px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;color:#4a3b12;background:#fdf6e7;margin:16px 0;padding:12px 16px}.article a{text-underline-offset:2px;text-decoration:underline}.faq details{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);margin-bottom:10px}.faq summary{cursor:pointer;color:var(--brand-dark);padding:12px 14px;font-weight:600}.faq details p{margin:0;padding:0 14px 12px}.sources{color:var(--muted);border-top:1px solid var(--line);margin-top:28px;padding-top:16px;font-size:.9rem}.sources ul{margin:8px 0 0;padding:0;list-style:none}.sources li{margin-bottom:6px}.siblings{margin-top:20px}.siblings-title{color:var(--brand);margin:0 0 10px;font-size:1rem}.siblings ul{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px;margin:0;padding:0;list-style:none;display:grid}.siblings li a{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--text);padding:10px 12px;font-weight:500;transition:border-color .15s;display:block}.siblings li a:hover{border-color:var(--accent);text-decoration:none}.card-grid{gap:12px;margin-top:16px;display:grid}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--text);box-shadow:var(--shadow);padding:16px;display:block}.card h3{color:var(--brand-dark);margin:0 0 6px;font-size:1.05rem}.card p{color:var(--muted);margin:0;font-size:.92rem}.card:hover{border-color:var(--accent);text-decoration:none}.notice{border-radius:var(--radius);margin:16px 0;padding:12px 14px;font-size:.95rem}.notice.warn{color:#4a3b12;background:#fdf6e7;border:1px solid #ecd9a4}.notice.info{background:var(--brand-light);color:var(--brand-dark);border:1px solid #c4d8e6}.notice.danger{color:#7a1c16;background:#fdecea;border:1px solid #f1b3ad}.search-form{gap:8px;margin:16px 0 4px;display:flex}.search-form input{flex:1}.search-hint{color:var(--muted);margin:8px 0 16px;font-size:.88rem}.search-results{gap:12px;display:grid}.search-result{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px}.search-result-link:hover{text-decoration:none}.search-result h2{color:var(--brand);margin:0 0 4px;font-size:1.05rem}.search-result p{color:var(--muted);margin:0 0 8px;font-size:.93rem}.search-meta{flex-wrap:wrap;gap:8px;display:flex}.status-tag{background:var(--brand-light);color:var(--brand);border-radius:999px;padding:2px 8px;font-size:.75rem;font-weight:600;display:inline-block}.status-tag.unverified{color:var(--danger);background:#fdecea}.site-footer{background:var(--brand-dark);color:#cdd9e2;font-size:.9rem}.footer-inner{max-width:var(--maxw);padding:28px 16px calc(var(--nav-h) + 24px);margin:0 auto}.footer-inner p{margin:0 0 8px}.footer-inner .disclaimer{color:#9fb4c3;font-size:.82rem}.footer-nav{flex-wrap:wrap;gap:10px 16px;margin:14px 0;display:flex}.footer-nav a{color:#cdd9e2;text-underline-offset:2px;text-decoration:underline}.copyright{color:#8aa0b0;font-size:.8rem}.bottom-nav{height:calc(var(--nav-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--surface);border-top:1px solid var(--line);z-index:100;display:flex;position:fixed;bottom:0;left:0;right:0}.bottom-nav a{color:var(--muted);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:2px;font-size:.7rem;font-weight:500;display:flex}.bottom-nav a.active{color:var(--brand);font-weight:700}.nav-icon{background:currentColor;border-radius:4px;width:22px;height:22px}.nav-icon[data-nav]{mask:none}.bar{bottom:calc(var(--nav-h) + env(safe-area-inset-bottom) + 8px);max-width:var(--maxw);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);z-index:200;margin:0 auto;padding:14px;position:fixed;left:12px;right:12px;box-shadow:0 -4px 20px #12405e26}.bar p{margin:0 0 10px;font-size:.9rem}.bar-actions{gap:8px;display:flex}.btn{font-family:var(--font);cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;padding:10px 14px;font-size:.9rem;font-weight:600;display:inline-flex}.btn.primary{background:var(--brand);color:#fff}.btn.secondary{background:var(--brand-light);color:var(--brand)}.btn:disabled{opacity:.5;cursor:not-allowed}.hero{background:linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);color:#fff;border-radius:var(--radius);text-align:center;margin-bottom:20px;padding:32px 22px}.hero-logo{background:#fff;border-radius:14px;width:clamp(140px,34vw,220px);height:auto;margin:0 auto 16px;padding:6px;display:block;box-shadow:0 8px 24px #00000047}.hero h1{margin:0 0 8px;font-size:1.7rem;line-height:1.3}.hero p{color:#cfe0ec;margin:0;font-size:1rem}.featured h2,.sections h2,.hub-group h2{color:var(--brand);margin:0 0 12px;font-size:1.2rem}.featured{margin-bottom:24px}.status-row{flex-wrap:wrap;gap:8px;margin:14px 0;display:flex}.ad-slot{border:1px dashed var(--line);border-radius:var(--radius);min-height:90px;color:var(--muted);justify-content:center;align-items:center;margin:16px 0;font-size:.8rem;display:flex}.ad-off,.ad-placeholder{color:var(--muted)}.next-page-card{min-height:64px;margin:20px 0}.next-page-link{background:var(--brand);color:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 16px;transition:background .15s;display:block}.next-page-link:hover{background:var(--brand-dark);text-decoration:none}.next-page-count{opacity:.85;font-size:.78rem}.next-page-label{margin-top:2px;font-size:1.05rem;font-weight:600}.consent-option{align-items:center;gap:8px;margin:6px 0;font-size:.9rem;display:flex}.hub-group{margin-top:28px}.hub-group h2{border-bottom:2px solid var(--brand-light);padding-bottom:6px}.hub-group ul{padding-left:20px}.hub-group li{margin-bottom:6px}.sample-structure{margin:16px 0 24px;overflow-x:auto}.sample-structure table{border-collapse:collapse;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);width:100%;font-size:.92rem}.sample-structure th,.sample-structure td{text-align:right;border-bottom:1px solid var(--line);padding:10px 12px}.sample-structure th{background:var(--brand-light);color:var(--brand-dark);font-weight:600}.sample-structure tr:last-child td{border-bottom:none}[hidden]{display:none!important}input,select,textarea{font-family:var(--font);border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:8px;width:100%;margin:4px 0 12px;padding:10px 12px;font-size:1rem}label{color:var(--brand-dark);font-weight:500;display:block}.login-msg{color:var(--danger);font-size:.9rem}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}@media (width>=768px){.content-wrap{padding-top:28px}.card-grid{grid-template-columns:repeat(2,1fr)}}