:root{--enh-blue:#3b82f6;--enh-gold:#facc15;--enh-dark-1:#111827;--enh-dark-2:#1a2235;--enh-dark-3:#1f2d3d}
body{font-family:'Poppins','Noto Sans Bengali','Hind Siliguri','SolaimanLipi',sans-serif;line-height:1.75;letter-spacing:0.01em;background-color:#1a2235;background-image:radial-gradient(circle at 15% 15%,rgba(59,130,246,0.08) 0%,transparent 35%),radial-gradient(circle at 85% 85%,rgba(250,204,21,0.05) 0%,transparent 30%);color:#e2e8f0}
h1,h2,h3,h4,h5,h6,.display-6,.section-title{font-family:'Poppins','Noto Sans Bengali','Hind Siliguri','SolaimanLipi',sans-serif;letter-spacing:-0.01em;line-height:1.4;color:#f8fafc}
.section-title{text-shadow:0 2px 12px rgba(59,130,246,0.35)}
.text-warning,[class*="gold"]{color:#facc15;text-shadow:0 1px 3px rgba(250,204,21,0.4)}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:#111827}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#3b82f6,#1d4ed8);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:#facc15}
*{scrollbar-width:thin;scrollbar-color:#3b82f6 #111827}
.navbar{background:rgba(17,24,39,0.85);backdrop-filter:blur(12px);border-bottom:1px solid rgba(59,130,246,0.2);box-shadow:0 4px 20px rgba(0,0,0,0.3)}
.navbar .nav-link{color:#cbd5e1;transition:color 0.3s ease,text-shadow 0.3s ease;border-radius:8px;padding:0.5rem 0.9rem}
.navbar .nav-link:hover,.navbar .nav-link:focus,.navbar .nav-link.active{color:#facc15;text-shadow:0 0 8px rgba(250,204,21,0.5)}
main > section,section.py-5{padding-top:72px;padding-bottom:72px}
@media (max-width:767.98px){main > section,section.py-5{padding-top:48px;padding-bottom:48px}}
main .card,main .info-card,main .feature-card,main .hero-card,.author-card{background:linear-gradient(145deg,rgba(31,45,61,0.95),rgba(26,34,53,0.95));border:1px solid rgba(59,130,246,0.15);border-radius:16px;padding:24px;box-shadow:0 8px 24px rgba(0,0,0,0.25);transition:transform 0.3s ease,box-shadow 0.3s ease,border-color 0.3s ease}
main .card:hover,main .info-card:hover,main .feature-card:hover,main .hero-card:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(0,0,0,0.35);border-color:rgba(59,130,246,0.4)}
.btn,.site-btn{border-radius:10px;font-weight:600;transition:transform 0.25s ease,box-shadow 0.25s ease,background-color 0.25s ease,color 0.25s ease}
.btn-ice,.btn-neon,.cta-register{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#ffffff;border:1px solid #3b82f6;box-shadow:0 4px 15px rgba(59,130,246,0.3)}
.btn-ice:hover,.btn-neon:hover,.cta-register:hover{transform:scale(1.03);box-shadow:0 8px 20px rgba(59,130,246,0.5);background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#ffffff}
.btn-outline-ice,.btn-outline-neon,.cta-login{background:transparent;color:#facc15;border:1px solid #facc15;box-shadow:0 0 0 rgba(250,204,21,0)}
.btn-outline-ice:hover,.btn-outline-neon:hover,.cta-login:hover{transform:scale(1.03);background:rgba(250,204,21,0.1);box-shadow:0 0 15px rgba(250,204,21,0.3);color:#fde047}
.author-box{background:linear-gradient(90deg,rgba(17,24,39,0.9),rgba(31,45,61,0.9),rgba(17,24,39,0.9));border:1px solid rgba(59,130,246,0.2);border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,0.3);padding:24px}
.bd-hot-links a{color:#94a3b8;transition:color 0.25s ease,padding-left 0.25s ease}
.bd-hot-links a:hover{color:#facc15;padding-left:4px;text-shadow:0 0 5px rgba(250,204,21,0.4)}
.form-control,input[type="text"],input[type="email"],input[type="password"],textarea{background-color:rgba(15,23,42,0.8);border:1px solid rgba(59,130,246,0.2);color:#e2e8f0;border-radius:8px;transition:border-color 0.25s ease,box-shadow 0.25s ease}
.form-control:focus,input:focus,textarea:focus{border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,0.2);background-color:rgba(15,23,42,0.95);color:#ffffff}
footer,.footer{background:#111827;border-top:1px solid rgba(59,130,246,0.15);padding-top:48px}
footer a,.footer a{transition:color 0.25s ease;text-decoration:none}
footer a:hover,.footer a:hover{color:#facc15}
.small-muted,.text-muted{color:#94a3b8}
img{border-radius:12px}
.rounded-pill{box-shadow:0 2px 8px rgba(0,0,0,0.2)}