:root{--blue: #60a5fa;--purple: #a855f7;--gold: #fbbf24;--dark: #0f172a}.app-container{width:100vw;height:100vh;background:#000;display:flex;justify-content:center;align-items:center;font-family:Inter,system-ui,sans-serif;color:#fff}.game-screen{width:600px;height:800px;background:var(--dark);position:relative;overflow:hidden;border:1px solid rgba(255,255,255,.1);box-shadow:0 0 40px #000c;touch-action:none}.stars-bg{position:absolute;top:0;right:0;bottom:0;left:0;background-image:radial-gradient(1px 1px at 20px 30px,#fff,#0000),radial-gradient(1px 1px at 100px 150px,#fff,#0000),radial-gradient(2px 2px at 200px 400px,#fff,#0000);background-size:300px 300px;opacity:.4;animation:scrollBg 20s linear infinite}@keyframes scrollBg{0%{background-position:0 0}to{background-position:0 800px}}.hud{position:absolute;top:0;width:100%;padding:20px;display:flex;justify-content:space-between;align-items:flex-start;z-index:10}.score-box{font-size:1.5rem;font-weight:800;display:flex;align-items:center;gap:8px}.high-score{font-size:.8rem;opacity:.5;margin-top:4px}.wave-tag{background:#ffffff1a;padding:4px 12px;border-radius:20px;font-weight:700}.xp-bar-outer{position:absolute;top:80px;left:20px;right:20px;height:6px;background:#ffffff1a;border-radius:3px;z-index:10}.xp-bar-inner{height:100%;background:var(--blue);box-shadow:0 0 10px var(--blue);transition:width .3s ease}.level-tag{position:absolute;right:0;top:-20px;color:var(--blue);font-weight:700;font-size:.8rem}.player{position:absolute;width:60px;height:60px;transform:translate(-50%,-50%);z-index:5;filter:drop-shadow(0 0 10px var(--blue))}.player img{width:100%;height:100%;object-fit:contain}.bullet{position:absolute;width:4px;height:20px;background:#fff;border-radius:2px;box-shadow:0 0 10px var(--blue);transform:translate(-50%)}.enemy{position:absolute;width:50px;height:50px;display:flex;flex-direction:column;align-items:center}.enemy img{width:100%;height:100%;object-fit:contain}.hp-mini{width:30px;height:3px;background:#ff00004d;margin-top:5px}.hp-mini div{height:100%;background:#f44}.boss-unit{position:absolute;width:120px;height:120px;filter:drop-shadow(0 0 20px var(--gold))}.boss-unit img{width:100%;height:100%}.boss-hp-bar{width:100%;height:6px;background:#333;margin-top:10px;border-radius:3px}.boss-hp-bar div{height:100%;background:var(--gold)}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#0f172af2;display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:100;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.title{font-size:4rem;font-weight:900;background:linear-gradient(to bottom,#fff,#666);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.subtitle{margin-bottom:40px;opacity:.7}.skill-list{display:flex;flex-direction:column;gap:15px;width:80%}.skill-item{padding:20px;border-radius:12px;cursor:pointer;border:1px solid rgba(255,255,255,.1);transition:all .2s}.skill-item.advanced{background:#a855f726;border-color:var(--purple)}.skill-item.super{background:#fbbf2426;border-color:var(--gold)}.skill-item:hover{transform:scale(1.02);background:#ffffff1a}.skill-badge{font-size:.6rem;padding:2px 8px;border-radius:4px;margin-bottom:8px;display:inline-block;background:#444}.advanced .skill-badge{background:var(--purple)}.super .skill-badge{background:var(--gold);color:#000}.start-btn{padding:15px 40px;font-size:1.2rem;font-weight:700;background:var(--blue);border:none;border-radius:30px;color:#fff;cursor:pointer;box-shadow:0 0 20px var(--blue)}