* { box-sizing: border-box; } body {margin: 0;}#bn-header.scrolled{background:rgba(59, 130, 246, 0.95);box-shadow:0 4px 24px 0 rgba(59, 130, 246, 0.15);padding-top:0.5rem !important;padding-bottom:0.5rem !important;}#bn-plan-toggle button{transition:background 0.2s, color 0.2s;}#bn-plan-toggle button.active{background:linear-gradient(90deg, #6366f1 0%, #a78bfa 100%);color:#fff;}details[open] summary:after{content:"▲";margin-left:0.5em;color:#6366f1;}details summary:after{content:"▼";margin-left:0.5em;color:#a1a1aa;}#bn-butterfly-modal{transition:opacity 0.3s;}#bn-butterfly-modal.active{opacity:1 !important;pointer-events:auto !important;}#bn-butterfly-full-img{animation:butterfly-fadein 0.5s;}@keyframes float{0%{transform:translateY(0);}100%{transform:translateY(-24px);}}@keyframes butterfly-fadein{from{opacity:0;transform:scale(0.8);}to{opacity:1;transform:scale(1);}}@media (min-width: 768px){.animate-float{animation:float 4s ease-in-out infinite alternate;}}