*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#1e3c72,#2a5298);color:#fff;min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:2rem}.header{text-align:center;margin-bottom:3rem}.header h1{font-size:3rem;margin-bottom:1rem;background:linear-gradient(45deg,gold,#ffed4e);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header p{font-size:1.2rem;opacity:.9}.button{background:linear-gradient(45deg,#667eea,#764ba2);border:none;border-radius:8px;color:#fff;cursor:pointer;font-size:1rem;font-weight:600;padding:12px 24px;transition:all .3s ease;text-transform:uppercase;letter-spacing:1px}.button:hover{transform:translateY(-2px);box-shadow:0 8px 25px #0000004d}.button:disabled{opacity:.6;cursor:not-allowed;transform:none}.button.primary{background:linear-gradient(45deg,#ff6b6b,#ee5a52)}.button.secondary{background:linear-gradient(45deg,#4ecdc4,#44a08d)}.card{background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px;border:1px solid rgba(255,255,255,.2);padding:2rem;margin:1rem 0;box-shadow:0 8px 32px #0000004d}.character-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin:2rem 0}.character-card{background:#ffffff26;border-radius:12px;padding:1.5rem;text-align:center;transition:transform .3s ease;cursor:pointer;border:2px solid transparent}.character-card:hover{transform:translateY(-5px);border-color:gold}.character-card.selected{border-color:#ff6b6b;background:#ff6b6b33}.character-image{width:100px;height:100px;border-radius:50%;margin:0 auto 1rem;background:linear-gradient(45deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;font-size:2rem}.health-bar{width:100%;height:20px;background:#0000004d;border-radius:10px;overflow:hidden;margin:1rem 0}.health-fill{height:100%;background:linear-gradient(90deg,#4ecdc4,#44a08d);transition:width .5s ease;border-radius:10px}.health-fill.low{background:linear-gradient(90deg,#ff6b6b,#ee5a52)}.battle-arena{display:grid;grid-template-columns:1fr 1fr;gap:3rem;margin:2rem 0;align-items:center}.vs-indicator{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:2rem;font-weight:700;background:#ffd700e6;color:#1e3c72;padding:1rem;border-radius:50%;width:80px;height:80px;display:flex;align-items:center;justify-content:center}.battle-log{background:#0000004d;border-radius:8px;padding:1rem;height:200px;overflow-y:auto;font-family:monospace;font-size:.9rem;line-height:1.5}.loading{display:flex;align-items:center;justify-content:center;gap:.5rem}.spinner{width:20px;height:20px;border:2px solid rgba(255,255,255,.3);border-top:2px solid white;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.wallet-info{background:#ffffff1a;border-radius:8px;padding:1rem;margin-bottom:2rem;display:flex;justify-content:space-between;align-items:center}.wallet-address{font-family:monospace;background:#0000004d;padding:.5rem;border-radius:4px}.error{background:#ff6b6b33;border:1px solid #ff6b6b;border-radius:8px;padding:1rem;margin:1rem 0;color:#ffcdd2}.success{background:#4caf5033;border:1px solid #4caf50;border-radius:8px;padding:1rem;margin:1rem 0;color:#c8e6c9}@media (max-width: 768px){.battle-arena{grid-template-columns:1fr;gap:2rem}.character-grid{grid-template-columns:1fr}.header h1{font-size:2rem}}