:root { --accent:#F97316; --ink:#0F172A; --bg:#EFF6FF; }
*{box-sizing:border-box}
body{margin:0;font-family:ui-sans-serif,system-ui,Segoe UI,Roboto,Ubuntu;background:var(--bg);color:var(--ink);}
a.button{background:var(--accent);color:#fff;padding:.8rem 1.2rem;border-radius:.75rem;text-decoration:none;font-weight:700;transition:transform 0.2s,box-shadow 0.2s}
a.button:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(249,115,22,0.4)}
.container{max-width:1000px;margin:0 auto;padding:2rem}
.card{background:#fff;border-radius:1.25rem;box-shadow:0 6px 24px rgba(2,6,23,.08);padding:1.25rem}
.product-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(2,6,23,.15)}
.grid{display:grid;gap:1.25rem}
.center{text-align:center}
.nav{padding:1rem 0;border-bottom:1px solid rgba(203,213,225,0.3);margin-bottom:1rem}
.nav a{color:#1D4ED8;text-decoration:none;margin-right:1.5rem;font-weight:500;transition:color 0.2s}
.nav a:hover{color:#F97316}
.cover{width:min(100%,22rem);border-radius:1rem;box-shadow:0 8px 24px rgba(2,6,23,.12)}
.badge{display:inline-block;background:#1D4ED8;color:#fff;padding:.25rem .6rem;border-radius:.6rem;font-size:.8rem;margin-left:.4rem}
.hero{display:grid;gap:1rem;align-items:center;justify-items:center}
.hero img.banner{max-width:100%;border-radius:1rem;box-shadow:0 8px 32px rgba(2,6,23,.2);transition:transform 0.3s}
.hero img.banner:hover{transform:scale(1.02)}
.pricing{font-size:1.1rem;color:#334155}
footer{color:#64748B;text-align:center;padding:2rem 0}

/* Animations */
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.05)}}
@keyframes fadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}

/* Interactive Bingo Card Styles */
.bingo-demo{display:grid;grid-template-columns:repeat(auto-fit,minmax(80px,1fr));gap:0.5rem;max-width:500px;margin:2rem auto}
.bingo-card{aspect-ratio:1;background:transparent;border-radius:0.5rem;cursor:pointer;transition:transform 0.6s;position:relative;transform-style:preserve-3d;perspective:1000px}
.bingo-card:hover{transform:scale(1.05)}
.bingo-card.flipped{transform:rotateY(180deg)}
.bingo-card.flipped:hover{transform:rotateY(180deg) scale(1.05)}
.bingo-card.free{background:#1D4ED8;color:#fff;border:2px solid #1D4ED8;font-weight:700;display:flex;align-items:center;justify-content:center;text-align:center;font-size:0.75rem;padding:0.5rem}
.bingo-card-front,.bingo-card-back{backface-visibility:hidden;position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:0.5rem;border-radius:0.5rem;font-size:0.75rem;text-align:center;border:2px solid #CBD5E1;background:#fff}
.bingo-card-front{z-index:2}
.bingo-card-back{transform:rotateY(180deg);background:#10B981;color:#fff;border-color:#10B981;font-size:1rem;font-weight:700}