/* mobile-first UI */ 
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#0f1223;color:#eaf0ff}
a{color:#fff;text-decoration:none}
.auth,.app{min-height:100vh;display:flex;flex-direction:column;align-items:center}
.auth-card{margin-top:6vh;background:#15183a;border:1px solid #2a2e59;border-radius:18px;padding:20px;width:92%;max-width:420px;box-shadow:0 10px 40px rgba(0,0,0,.35)}
h1,h2{margin:8px 0}h1{font-size:24px;text-align:center}h2{font-size:18px}
label{display:block;margin:8px 0 6px}
input{width:100%;padding:12px;border-radius:12px;border:1px solid #2a2e59;background:#0c1030;color:#fff}
button{padding:10px 14px;border:0;border-radius:12px;background:#3944f7;color:#fff;font-weight:600}
button.secondary{background:#2a2e59}button:active{transform:scale(.98)}
.alert{background:#2a2e59;padding:10px;border-radius:8px;margin:8px 0}
.tabs{display:flex;gap:8px;margin-bottom:10px}.tab{display:none}.tab.active{display:block}
.tab-btn{flex:1;background:#2a2e59}.foot-note{opacity:.7;text-align:center;margin-top:10px}
.topbar{position:sticky;top:0;z-index:10;background:#111536;border-bottom:1px solid #2a2e59;width:100%;padding:10px}
.topbar .balances{display:flex;gap:10px;flex-wrap:wrap}.topbar .logout{float:right}
.content{flex:1;width:100%;max-width:900px;padding:12px}
.panel{background:#15183a;border:1px solid #2a2e59;border-radius:16px;padding:12px;margin-bottom:12px}
.list .item{display:flex;justify-content:space-between;align-items:center;padding:10px;border:1px solid #2a2e59;border-radius:12px;margin:8px 0}
.inline{display:inline}.tag{padding:4px 8px;border-radius:12px;background:#2a2e59}.tag.success{background:#00c853}
.bottombar{position:sticky;bottom:0;z-index:10;display:flex;gap:10px;justify-content:space-around;background:#111536;border-top:1px solid #2a2e59;width:100%;padding:10px}
.bottombar a{padding:8px 10px;border-radius:12px}.bottombar a.active{background:#3944f7}
.controls{display:flex;gap:6px;justify-content:center;margin-top:8px}
canvas#game{width:100%;height:auto;background:linear-gradient(180deg,#0f1223,#111536)}
.payinfo{opacity:.9;margin-top:10px}
@media (min-width:700px){ .content{padding:20px} }