*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--blue:#2563EB;--pink:#EC4899;--yellow:#FBBF24;--white:#FFFFFF;--gray:#F3F4F6;--dark:#1E293B;--text:#334155;--radius:12px;--shadow:0 4px 24px rgba(0,0,0,.08)}
html{scroll-behavior:smooth}
body{font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;color:var(--text);background:var(--white);line-height:1.6;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
/* NAV */
.nav{background:var(--blue);color:#fff;padding:0 1.5rem;position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(37,99,235,.3)}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:60px}
.nav-logo{font-weight:800;font-size:1.5rem;color:#fff;text-decoration:none;letter-spacing:-.02em}
.nav-logo span{color:var(--yellow)}
.nav-links{display:flex;gap:1.5rem;list-style:none}
.nav-links a{color:#fff;font-weight:500;font-size:.95rem;text-decoration:none;opacity:.9;transition:opacity .2s}
.nav-links a:hover{opacity:1;text-decoration:none}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:4px}
.nav-toggle svg{width:28px;height:28px;fill:#fff}
/* HERO */
.hero{background:linear-gradient(135deg,var(--blue) 0%,#1E40AF 50%,var(--pink) 100%);color:#fff;text-align:center;padding:5rem 1.5rem 4rem;position:relative;overflow:hidden}
.hero::after{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");pointer-events:none}
.hero h1{font-size:clamp(2.2rem,5vw,3.8rem);font-weight:900;margin-bottom:.75rem;position:relative;z-index:1}
.hero h1 span{color:var(--yellow)}
.hero p{font-size:clamp(1rem,2vw,1.3rem);opacity:.92;max-width:640px;margin:0 auto 2rem;position:relative;z-index:1}
.hero-cta{display:inline-flex;gap:1rem;flex-wrap:wrap;justify-content:center;position:relative;z-index:1}
.btn{display:inline-block;padding:.85rem 2rem;border-radius:50px;font-weight:700;font-size:1rem;text-decoration:none;transition:transform .2s,box-shadow .2s;cursor:pointer;border:none}
.btn:hover{transform:translateY(-2px);text-decoration:none}
.btn-primary{background:var(--yellow);color:var(--dark);box-shadow:0 4px 16px rgba(251,191,36,.4)}
.btn-secondary{background:rgba(255,255,255,.15);color:#fff;border:2px solid rgba(255,255,255,.3)}
.btn-pink{background:var(--pink);color:#fff;box-shadow:0 4px 16px rgba(236,72,153,.4)}
/* SECTIONS */
.section{padding:4rem 1.5rem}
.section-inner{max-width:1200px;margin:0 auto}
.section-title{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;text-align:center;margin-bottom:.5rem;color:var(--dark)}
.section-subtitle{text-align:center;color:#64748B;margin-bottom:2.5rem;font-size:1.05rem}
.section-alt{background:var(--gray)}
/* CARDS */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}
.card{background:var(--white);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:0 8px 32px rgba(0,0,0,.12)}
.card-icon{width:56px;height:56px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:1rem;font-size:1.5rem}
.card-icon-blue{background:rgba(37,99,235,.1);color:var(--blue)}
.card-icon-pink{background:rgba(236,72,153,.1);color:var(--pink)}
.card-icon-yellow{background:rgba(251,191,36,.15);color:#B45309}
.card h3{font-size:1.15rem;font-weight:700;margin-bottom:.5rem;color:var(--dark)}
.card p{color:#64748B;font-size:.95rem}
/* GAME MODES */
.modes{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}
.mode-card{border-radius:var(--radius);padding:2.5rem 2rem;text-align:center;color:#fff;box-shadow:var(--shadow);transition:transform .2s}
.mode-card:hover{transform:translateY(-4px)}
.mode-card h3{font-size:1.3rem;margin-bottom:.5rem}
.mode-card p{opacity:.9;font-size:.95rem;margin-bottom:1.25rem}
.mode-classic{background:linear-gradient(135deg,var(--blue),#1E40AF)}
.mode-speed{background:linear-gradient(135deg,var(--pink),#BE185D)}
.mode-team{background:linear-gradient(135deg,#8B5CF6,#6D28D9)}
/* LEADERBOARD */
.leaderboard{max-width:640px;margin:0 auto;background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.leaderboard-row{display:flex;align-items:center;padding:1rem 1.5rem;border-bottom:1px solid #E2E8F0;gap:1rem}
.leaderboard-row:last-child{border-bottom:none}
.lb-rank{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.85rem;flex-shrink:0}
.lb-gold{background:var(--yellow);color:#78350F}
.lb-silver{background:#CBD5E1;color:#334155}
.lb-bronze{background:#FDBA74;color:#7C2D12}
.lb-other{background:#F1F5F9;color:#64748B}
.lb-name{flex:1;font-weight:600;color:var(--dark)}
.lb-score{font-weight:700;color:var(--blue)}
/* DAILY GAME */
.game-container{max-width:720px;margin:0 auto;padding:2rem 0}
.game-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;gap:1rem}
.game-stat{text-align:center}
.game-stat-value{font-size:1.8rem;font-weight:800;color:var(--blue)}
.game-stat-label{font-size:.8rem;color:#64748B;text-transform:uppercase;letter-spacing:.05em}
.bingo-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-bottom:1.5rem}
.bingo-cell{aspect-ratio:1;border-radius:8px;display:flex;align-items:center;justify-content:center;text-align:center;font-size:.8rem;font-weight:600;cursor:pointer;transition:all .2s;border:2px solid #E2E8F0;background:var(--white);padding:4px;line-height:1.2;position:relative}
.bingo-cell:hover{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.bingo-cell.solved{background:var(--blue);color:#fff;border-color:var(--blue)}
.bingo-cell.bingo-win{background:var(--yellow);color:#78350F;border-color:var(--yellow);animation:pulse .6s ease infinite}
.bingo-cell.free-cell{background:var(--pink);color:#fff;border-color:var(--pink);cursor:default}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.05)}}
/* MODAL */
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);z-index:200;display:flex;align-items:center;justify-content:center;padding:1.5rem;opacity:0;pointer-events:none;transition:opacity .25s}
.modal-overlay.active{opacity:1;pointer-events:auto}
.modal{background:var(--white);border-radius:var(--radius);padding:2rem;max-width:420px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.modal h3{font-size:1.2rem;margin-bottom:.5rem;color:var(--dark)}
.modal p{color:#64748B;margin-bottom:1rem;font-size:.95rem}
.modal input{width:100%;padding:.75rem 1rem;border:2px solid #E2E8F0;border-radius:8px;font-size:1rem;font-family:inherit;outline:none;transition:border-color .2s}
.modal input:focus{border-color:var(--blue)}
.modal-actions{display:flex;gap:.75rem;margin-top:1rem}
.modal-close{background:#F1F5F9;color:var(--text);padding:.6rem 1.25rem;border-radius:8px;border:none;cursor:pointer;font-weight:600}
.modal-submit{background:var(--blue);color:#fff;padding:.6rem 1.25rem;border-radius:8px;border:none;cursor:pointer;font-weight:600}
.modal-feedback{margin-top:.75rem;padding:.5rem;border-radius:6px;text-align:center;font-weight:600;font-size:.9rem}
.feedback-correct{background:#D1FAE5;color:#065F46}
.feedback-wrong{background:#FEE2E2;color:#991B1B}
/* CONFETTI */
.confetti-container{position:fixed;top:0;left:0;right:0;bottom:0;pointer-events:none;z-index:300;overflow:hidden}
.confetti-piece{position:absolute;width:10px;height:10px;top:-10px;animation:confettiFall linear forwards}
@keyframes confettiFall{0%{transform:translateY(0) rotate(0deg);opacity:1}100%{transform:translateY(100vh) rotate(720deg);opacity:0}}
/* WIN BANNER */
.win-banner{background:linear-gradient(135deg,var(--yellow),#F59E0B);color:#78350F;text-align:center;padding:2rem;border-radius:var(--radius);margin-bottom:1.5rem;display:none}
.win-banner.show{display:block;animation:slideDown .4s ease}
@keyframes slideDown{from{transform:translateY(-20px);opacity:0}to{transform:translateY(0);opacity:1}}
.win-banner h2{font-size:1.5rem;margin-bottom:.25rem}
/* CLASSIC GAME */
.classic-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;max-width:600px;margin:0 auto 1.5rem}
.classic-cell{aspect-ratio:1;border-radius:8px;display:flex;align-items:center;justify-content:center;text-align:center;font-size:.75rem;font-weight:600;cursor:pointer;border:2px solid #E2E8F0;background:var(--white);padding:6px;line-height:1.2;transition:all .2s}
.classic-cell:hover{border-color:var(--pink)}
.classic-cell .cell-type{font-size:.6rem;color:var(--pink);text-transform:uppercase;display:block;margin-bottom:2px}
.classic-cell.marked{background:var(--pink);color:#fff;border-color:var(--pink)}
.classic-cell.free{background:var(--yellow);color:#78350F;border-color:var(--yellow);cursor:default}
/* PRINTABLE */
.print-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}
.print-card{border:3px solid var(--blue);border-radius:var(--radius);padding:1.5rem;background:var(--white)}
.print-card h3{text-align:center;font-size:1.1rem;color:var(--blue);margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid var(--gray)}
.print-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:4px}
.print-cell{aspect-ratio:1;border:1px solid #CBD5E1;border-radius:4px;display:flex;align-items:center;justify-content:center;text-align:center;font-size:.7rem;padding:2px;font-weight:500}
.print-cell.header{background:var(--blue);color:#fff;font-weight:700;font-size:.8rem;aspect-ratio:auto;padding:.25rem}
.print-btn{display:block;margin:2rem auto;background:var(--blue);color:#fff}
@media print{.nav,.footer,.print-btn,.no-print{display:none!important}.print-cards{display:grid;grid-template-columns:1fr 1fr}.print-card{break-inside:avoid;page-break-inside:avoid;border:2px solid #000}.section{padding:1rem 0}}
/* HOW TO PLAY */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;counter-reset:step}
.step{position:relative;padding:2rem 2rem 2rem 2rem;background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow)}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-12px;left:20px;width:36px;height:36px;background:var(--blue);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1rem}
.step h3{margin-bottom:.5rem;color:var(--dark)}
/* FOOTER */
.footer{background:var(--dark);color:#94A3B8;padding:3rem 1.5rem 1.5rem;margin-top:0}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem}
.footer h4{color:#fff;margin-bottom:.75rem;font-size:1rem}
.footer ul{list-style:none}
.footer li{margin-bottom:.4rem}
.footer a{color:#94A3B8;text-decoration:none;font-size:.9rem}
.footer a:hover{color:#fff}
.footer-bottom{max-width:1200px;margin:2rem auto 0;padding-top:1.5rem;border-top:1px solid #334155;text-align:center;font-size:.8rem}
.footer-bottom a{color:#94A3B8}
/* GWN FOOTER */
.gwn{text-align:center;padding:1rem;background:#111827;color:#64748B;font-size:.75rem}
.gwn a{color:#94A3B8}
/* RESPONSIVE */
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:60px;left:0;right:0;background:var(--blue);flex-direction:column;padding:1rem 1.5rem;gap:.75rem;box-shadow:0 8px 24px rgba(0,0,0,.15)}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .hero{padding:3.5rem 1.5rem 3rem}
  .bingo-cell{font-size:.65rem}
  .section{padding:3rem 1rem}
}