:root{color-scheme:dark;}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,"PingFang SC","Microsoft YaHei";background:#0b0f14;color:#e6edf3}
.wrap{max-width:720px;margin:0 auto;padding:22px}
h1{margin:0 0 12px;font-size:22px}
.card{background:#0f1621;border:1px solid #1f2a3a;border-radius:14px;padding:16px;box-shadow:0 10px 22px rgba(0,0,0,.25)}
label{display:block;font-size:13px;opacity:.9;margin-bottom:8px}
input{width:100%;box-sizing:border-box;background:#0b1220;color:#e6edf3;border:1px solid #22324a;border-radius:10px;padding:11px 12px;outline:none}
button{margin-top:12px;width:100%;padding:12px;border-radius:10px;border:1px solid #1b4dff;background:#1b4dff;color:#fff;font-weight:800;cursor:pointer}
button:disabled{opacity:.6;cursor:not-allowed}
.muted{opacity:.75;font-size:12px;line-height:1.6}
.msg{margin-top:10px;color:#ffdd57;font-size:13px}
.result{margin-top:12px}
.win{font-size:16px;font-weight:900;color:#7ee787;margin-bottom:10px}
.lose{font-size:16px;font-weight:900;color:#ff7b72;margin-bottom:10px}
.img{width:100%;border-radius:12px;border:1px solid #22324a}