:root{--primary-color: #4CAF50;--secondary-color: #f44336;--accent-color: #FFEB3B;--background-color: #1a1a2e;--text-color: #e0e0e0;--card-background: #16213e;--button-hover-bg: #0f3460;--border-color: #0f3460;--game-area-bg: #0f1a2e;--enemy-basic-color: #2ecc71;--enemy-fast-color: #e74c3c;--enemy-tank-color: #9b59b6;--bullet-color: #f1c40f;--building-color: #bdc3c7;--hero-selected-border: #8e44ad;--hero-locked-overlay: rgba(0, 0, 0, .7);--hud-bg: rgba(26, 26, 46, .8);--neon-glow: 0 0 5px #0f3460, 0 0 10px #0f3460, 0 0 15px #0f3460;--neon-text-glow: 0 0 8px rgba(76, 175, 80, .7)}body,html{margin:0;padding:0;width:100%;height:100%;background-color:var(--background-color);color:var(--text-color);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;overflow:hidden}.app-wrapper{position:relative;width:100%;height:100%;display:flex;justify-content:center;align-items:center;overflow:hidden}.cloud-sync-indicator{position:absolute;bottom:10px;right:10px;background-color:#00000080;color:#999;padding:5px 10px;border-radius:5px;font-size:.8em;z-index:1000}.start-screen{text-align:center;padding:40px;background:linear-gradient(135deg,var(--background-color) 0%,var(--card-background) 100%);border-radius:15px;box-shadow:0 10px 30px #00000080;animation:fadeIn 1s ease-out}.start-screen h1{font-size:3.5em;color:var(--primary-color);margin-bottom:15px;text-shadow:var(--neon-text-glow)}.start-screen .tagline{font-size:1.2em;color:var(--text-color);margin-bottom:30px;opacity:.8}.start-screen button{padding:15px 30px;font-size:1.2em;background-color:var(--primary-color);color:#fff;border:none;border-radius:8px;cursor:pointer;transition:background-color .3s ease,transform .2s ease;box-shadow:0 4px 15px #4caf5066}.start-screen button:hover{background-color:var(--button-hover-bg);transform:translateY(-2px);box-shadow:0 6px 20px #0f346099}.loading-screen{text-align:center;padding:50px;background:#1a212ecc;border-radius:15px;box-shadow:0 5px 20px #0006}.loading-screen p{font-size:1.5em;color:var(--text-color);margin-bottom:20px}.spinner{border:8px solid rgba(255,255,255,.3);border-top:8px solid var(--primary-color);border-radius:50%;width:60px;height:60px;animation:spin 1s linear infinite;margin:0 auto}.hero-selection-screen{width:90%;max-width:1200px;text-align:center;padding:30px;background:var(--hud-bg);border-radius:15px;box-shadow:0 8px 25px #0009;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);overflow-y:auto;max-height:85vh}.hero-selection-screen h1{font-size:2.8em;color:var(--accent-color);margin-bottom:30px;text-shadow:0 0 10px var(--accent-color)}.race-section{margin-bottom:40px;border-bottom:1px solid var(--border-color);padding-bottom:20px}.race-section h2{font-size:2em;color:var(--primary-color);margin-bottom:20px;text-shadow:var(--neon-text-glow)}.heroes-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:25px}.hero-card{background-color:var(--card-background);border-radius:12px;padding:20px;cursor:pointer;transition:transform .3s ease,box-shadow .3s ease,background-color .3s ease;border:3px solid transparent;position:relative;overflow:hidden}.hero-card:hover{transform:translateY(-8px);background-color:#2a3a5e;box-shadow:0 12px 35px #000000b3}.hero-card.selected{border-color:var(--hero-selected-border);box-shadow:0 0 20px var(--hero-selected-border),0 12px 35px #000000b3}.hero-card.locked{filter:grayscale(80%);opacity:.7}.hero-card.locked:before{content:"🔒";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:3em;color:#ffffff80}.hero-image{width:80px;height:80px;border-radius:8px;margin-bottom:15px;object-fit:cover}.hero-card h3{font-size:1.6em;color:var(--accent-color);margin-bottom:8px}.hero-card p{font-size:.95em;line-height:1.5;opacity:.85}.hero-card .unlock-cost{font-weight:700;color:var(--accent-color);margin-top:10px}.start-game-button{margin-top:30px;padding:12px 25px;font-size:1.1em;background-color:var(--primary-color);color:#fff;border:none;border-radius:6px;cursor:pointer;transition:background-color .3s ease,transform .2s ease}.start-game-button:hover:not(:disabled){background-color:var(--button-hover-bg);transform:translateY(-2px)}.start-game-button:disabled{background-color:#555;cursor:not-allowed}.game-container{position:relative;width:100%;height:100%;background-color:var(--game-area-bg);overflow:hidden;cursor:crosshair}.game-elements{position:relative;width:100%;height:100%}.player,.enemy,.bullet,.building{position:absolute;box-sizing:border-box}.player{background-color:var(--primary-color);border-radius:50%;transform:translate(-50%,-50%);transition:left .1s linear,top .1s linear}.enemy{transform:translate(-50%,-50%)}.enemy.enemy-basic{background-color:var(--enemy-basic-color)}.enemy.enemy-fast{background-color:var(--enemy-fast-color)}.enemy.enemy-tank{background-color:var(--enemy-tank-color)}.bullet{background-color:var(--bullet-color);width:8px;height:8px;border-radius:50%;transform:translate(-50%,-50%)}.building{transform:translate(-50%,-50%);background-color:var(--building-color);border-radius:5px}.hud{position:absolute;top:15px;left:15px;right:15px;display:flex;justify-content:space-between;align-items:flex-start;background:var(--hud-bg);padding:15px;border-radius:10px;box-shadow:0 4px 15px #00000080;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:10}.hud-section{display:flex;align-items:center;margin-right:25px}.hud-section:last-child{margin-right:0}.hud-label{font-size:1.1em;color:#bbb;margin-right:8px;font-weight:700;text-shadow:1px 1px 3px rgba(0,0,0,.5)}.hud-value{font-size:1.3em;font-weight:700;color:var(--accent-color);text-shadow:0 0 8px var(--accent-color)}.hud-value.score{color:var(--primary-color);text-shadow:0 0 8px var(--primary-color)}.hud-value.lives{color:var(--secondary-color);text-shadow:0 0 8px var(--secondary-color)}.hud-value.resources{color:var(--accent-color);text-shadow:0 0 8px var(--accent-color)}.hero-hud{display:flex;align-items:center;background-color:#0006;padding:10px 15px;border-radius:8px;border:1px solid var(--border-color)}.hero-hud-image{width:50px;height:50px;border-radius:50%;margin-right:15px;object-fit:cover;border:2px solid var(--accent-color)}.hero-hud-info{margin-right:20px}.hero-hud-info p{margin:0;font-size:.9em;line-height:1.4}.hero-hud-info p:first-child{font-weight:700;color:var(--accent-color)}.hero-skills{display:flex;gap:5px}.skill-button{background-color:#333;color:#fff;border:1px solid #555;border-radius:4px;width:30px;height:30px;font-size:.9em;cursor:pointer;transition:background-color .2s ease}.skill-button:hover{background-color:#555}.game-over-screen{text-align:center;padding:50px;background:#000000b3;border-radius:15px;box-shadow:0 10px 30px #000000b3;animation:fadeIn 1s ease-out}.game-over-screen h1{font-size:4em;color:var(--secondary-color);margin-bottom:15px;text-shadow:0 0 15px var(--secondary-color)}.game-over-screen p{font-size:1.5em;margin-bottom:10px}.game-over-screen p:last-child{font-size:1.8em;font-weight:700;color:var(--accent-color);margin-top:25px}.game-over-screen button{padding:12px 25px;font-size:1.1em;background-color:var(--primary-color);color:#fff;border:none;border-radius:6px;cursor:pointer;margin:10px;transition:background-color .3s ease,transform .2s ease}.game-over-screen button:hover{background-color:var(--button-hover-bg);transform:translateY(-2px)}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media (max-width: 768px){.start-screen h1{font-size:2.5em}.hero-selection-screen{width:95%;padding:20px}.heroes-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px}.hero-card{padding:15px}.hero-card h3{font-size:1.3em}.hud{flex-direction:column;align-items:flex-start}.hud-section{margin-bottom:10px}.hero-hud{flex-direction:column;align-items:center;width:100%}.hero-hud-image{margin-right:0;margin-bottom:10px}.hero-skills{margin-top:10px}.game-over-screen h1{font-size:3em}}@media (max-width: 480px){.start-screen button,.start-game-button,.game-over-screen button{padding:10px 20px;font-size:1em}.hud{top:10px;left:10px;right:10px;padding:10px}.hud-label{font-size:.9em}.hud-value{font-size:1.1em}.hero-hud-image{width:40px;height:40px}.hero-hud-info p{font-size:.8em}}