:root{--bg-dark: #090807;--panel-dark: #151312;--border-color: #2a2522;--text-light: #f5f5f4;--text-muted: #a8a29e;--color-red: #ef4444;--color-blue: #3b82f6;--color-yellow: #f59e0b;--color-purple: #a855f7;--color-cyan: #22d3ee}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-dark);color:var(--text-light);-webkit-user-select:none;user-select:none;overflow:hidden}.app-container{display:flex;flex-direction:column;height:100vh;width:100vw}.game-header{display:flex;justify-content:space-between;align-items:center;background-color:var(--panel-dark);border-bottom:2px solid var(--border-color);padding:10px 20px;height:60px;box-sizing:border-box;z-index:10}.header-left,.header-right{display:flex;align-items:center;gap:12px}.brand-logo{font-size:1.2rem;font-weight:900;letter-spacing:1.5px;background:linear-gradient(135deg,#f59e0b,#ef4444);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin:0 15px 0 0;cursor:pointer}.status-badge{display:flex;align-items:center;gap:6px;background-color:#1e1b19;padding:6px 12px;border-radius:8px;font-size:.9rem;border:1px solid #332e2a}.status-badge.sandbox-badge{border-color:var(--color-cyan);background-color:#22d3ee1a;color:var(--color-cyan);font-weight:700}.status-badge strong{font-size:1rem}.icon{width:16px;height:16px}.text-red{color:var(--color-red)}.text-blue{color:var(--color-blue)}.text-yellow{color:var(--color-yellow)}.text-purple{color:var(--color-purple)}.text-cyan{color:var(--color-cyan)}.icon-btn{background:none;border:1px solid var(--border-color);color:var(--text-light);padding:8px;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.icon-btn:hover{background-color:#1e1b19;border-color:#574f4a}.game-main{display:flex;flex:1;overflow:hidden;position:relative}.canvas-wrapper{flex:1;display:flex;align-items:center;justify-content:center;background-color:#080706;position:relative}canvas{border-radius:12px;box-shadow:0 15px 40px #000c;cursor:crosshair;background-color:#0f0d0c;border:2px solid var(--border-color)}.wave-countdown-overlay{position:absolute;top:20px;left:50%;transform:translate(-50%);z-index:5}.countdown-box{background-color:#151312f2;border:2px solid #f59e0b;padding:12px 24px;border-radius:12px;text-align:center;box-shadow:0 8px 24px #0009;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.countdown-title{margin:0;font-size:.85rem;color:var(--text-muted)}.countdown-number{font-size:1.8rem;font-weight:900;color:#f59e0b;margin:4px 0}.btn-skip-countdown{background-color:#f59e0b;color:#151312;border:none;border-radius:6px;padding:6px 12px;font-size:.8rem;font-weight:700;cursor:pointer;transition:all .2s}.btn-skip-countdown:hover{background-color:#d97706;transform:scale(1.03)}.sidebar{width:350px;background-color:var(--panel-dark);border-left:2px solid var(--border-color);display:flex;flex-direction:column;padding:20px;box-sizing:border-box;overflow-y:auto;gap:20px}.sidebar.empty{justify-content:center;align-items:center;text-align:center}.empty-tip{color:var(--text-muted)}.empty-icon{width:48px;height:48px;color:#332e2a;margin-bottom:15px}.empty-tip p{margin:5px 0;font-size:.95rem}.empty-tip .sub{font-size:.8rem;color:#78716c}.sandbox-quick-panel{margin-top:30px;background-color:#22d3ee0d;border:1px dashed var(--color-cyan);border-radius:12px;padding:15px;display:flex;flex-direction:column;gap:10px}.sandbox-quick-panel h4{margin:0 0 5px;font-size:.9rem;display:flex;align-items:center;justify-content:center;gap:6px}.btn-sandbox-cmd{background-color:#1e1b19;border:1px solid #332e2a;color:var(--text-light);padding:8px 12px;border-radius:8px;font-size:.8rem;font-weight:700;cursor:pointer;transition:all .2s;text-align:left}.btn-sandbox-cmd:hover{background-color:var(--color-cyan);color:#000;border-color:var(--color-cyan)}.tower-info-card{display:flex;flex-direction:column;gap:15px}.card-header{display:flex;justify-content:space-between;align-items:center}.card-header h3{margin:0;font-size:1.1rem;color:var(--text-light)}.level-badge{padding:3px 10px;border-radius:12px;font-size:.8rem;font-weight:700}.level-badge.lv-1{background-color:#78716c;color:#fff}.level-badge.lv-2{background-color:#3b82f6;color:#fff}.level-badge.lv-3{background-color:#d97706;color:#fff}.exp-bar-container{background-color:#1e1b19;padding:10px;border-radius:8px}.exp-label{display:flex;justify-content:space-between;font-size:.8rem;color:var(--text-muted);margin-bottom:6px}.exp-track{height:8px;background-color:#0f0d0c;border-radius:4px;overflow:hidden}.exp-fill{height:100%;background:linear-gradient(90deg,#10b981,#3b82f6);transition:width .3s ease}.exp-tip-text{margin:6px 0 0;font-size:.7rem;color:#78716c;line-height:1.2}.slots-section h4{margin:0 0 10px;font-size:.85rem;color:var(--text-muted)}.slots-grid{display:flex;gap:10px}.slot-box{flex:1;aspect-ratio:1;border:2px dashed #332e2a;border-radius:8px;display:flex;align-items:center;justify-content:center;position:relative;background-color:#0f0d0c}.slot-box.filled{border-style:solid}.slot-content{width:100%;height:100%;border-radius:6px;display:flex;align-items:center;justify-content:center;position:relative}.slot-content.mod-arrow{background-color:#ef444426;border:1.5px solid var(--color-red)}.slot-content.mod-frost{background-color:#3b82f626;border:1.5px solid var(--color-blue)}.slot-content.mod-fire{background-color:#f9731626;border:1.5px solid #f97316}.slot-content.mod-lightning{background-color:#22d3ee26;border:1.5px solid var(--color-cyan)}.mod-name{font-size:1.2rem}.btn-remove-mod{position:absolute;top:-4px;right:-4px;background-color:#ef4444;border:none;color:#fff;border-radius:50%;width:16px;height:16px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:10px;font-weight:700}.slot-empty-plus{color:#332e2a;font-size:1.2rem}.resonance-card{background-color:#1e1b19;border-radius:8px;padding:12px;border-left:4px solid}.resonance-card.res-multi{border-left-color:var(--color-yellow)}.resonance-card.res-steam{border-left-color:var(--color-purple)}.resonance-card.res-ice{border-left-color:var(--color-blue)}.resonance-card.res-firearrow{border-left-color:var(--color-red)}.resonance-card.res-steam-field{border-left-color:var(--color-purple)}.resonance-card.res-thunder{border-left-color:var(--color-cyan)}.resonance-card.res-plasma{border-left-color:#f97316}.resonance-card.res-superconduct{border-left-color:var(--color-blue)}.resonance-card.res-thor{border-left-color:var(--color-cyan)}.resonance-card.res-prismatic{border-left-color:#a855f7;background:linear-gradient(90deg,rgba(168,85,247,.05),transparent)}.resonance-card.res-none{border-left-color:#78716c}.resonance-title{display:flex;align-items:center;gap:6px;font-weight:700;font-size:.85rem;margin-bottom:4px}.text-rainbow{background:linear-gradient(90deg,#ef4444,#3b82f6,#22d3ee,#f59e0b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;font-weight:900}.resonance-desc{margin:0;font-size:.75rem;color:var(--text-muted);line-height:1.3}.shop-section h4{margin:0 0 10px;font-size:.85rem;color:var(--text-muted)}.shop-grid{display:flex;flex-direction:column;gap:8px}.shop-item{background-color:#1e1b19;border:1px solid #332e2a;border-radius:8px;padding:10px;text-align:left;cursor:pointer;transition:all .2s;color:var(--text-light)}.shop-item:hover:not(.disabled){border-color:#f59e0b;background-color:#2a2522}.shop-item.disabled{opacity:.4;cursor:not-allowed}.shop-item-header{display:flex;justify-content:space-between;font-weight:700;font-size:.85rem;margin-bottom:4px}.shop-item-cost{color:var(--color-yellow)}.shop-item-desc{margin:0;font-size:.75rem;color:var(--text-muted)}.btn-dismantle{background-color:#ef444414;border:1px solid rgba(239,68,68,.2);color:#f87171;border-radius:8px;padding:10px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;font-weight:700;transition:all .2s;margin-top:10px}.btn-dismantle:hover{background-color:#ef444426}.game-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#080706f5;display:flex;justify-content:center;align-items:center;z-index:100}.menu-card{background-color:var(--panel-dark);border:2px solid var(--border-color);border-radius:20px;padding:40px;width:460px;max-width:90%;text-align:center;box-shadow:0 20px 50px #000000e6}.logo-container{position:relative;margin-bottom:25px}.logo-glow{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:180px;height:180px;background:radial-gradient(circle,rgba(245,158,11,.15) 0%,transparent 70%);filter:blur(20px)}.game-title{font-size:2.2rem;font-weight:900;line-height:1.2;margin:0;letter-spacing:2px}.gradient-text{background:linear-gradient(135deg,#f59e0b,#ef4444);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.game-subtitle{color:var(--text-muted);font-size:.85rem;margin-top:8px;letter-spacing:1px}.stats-preview{display:flex;justify-content:center;margin-bottom:25px}.menu-buttons{display:flex;flex-direction:column;gap:12px;margin-bottom:25px}.btn-primary{background:linear-gradient(135deg,#f59e0b,#ef4444);color:#fff;border:none;border-radius:12px;padding:14px 28px;font-size:1.1rem;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:10px;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 15px #ef444466}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ef444499}.btn-sandbox{background:linear-gradient(135deg,#06b6d4,#0891b2);color:#fff;border:none;border-radius:12px;padding:14px 28px;font-size:1.1rem;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:10px;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 15px #06b6d466}.btn-sandbox:hover{transform:translateY(-2px);box-shadow:0 6px 20px #06b6d499}.btn-secondary{background-color:#1e1b19;border:1px solid #332e2a;color:var(--text-light);border-radius:12px;padding:12px 28px;font-size:1rem;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:10px;transition:all .2s}.btn-secondary:hover{background-color:#2a2522;border-color:#574f4a}.btn-icon{width:18px;height:18px}.quick-tips{background-color:#1e1b19;border-radius:10px;padding:12px;border:1px solid #332e2a}.tip-title{margin:0 0 4px;font-size:.8rem;color:var(--color-yellow);font-weight:700}.tip-desc{margin:0;font-size:.75rem;color:var(--text-muted);line-height:1.4}.guide-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#000000d9;display:flex;justify-content:center;align-items:center;z-index:200}.guide-modal{background-color:var(--panel-dark);border:2px solid var(--border-color);border-radius:16px;width:600px;max-width:95%;max-height:85vh;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 25px 50px #000000e6}.guide-modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;border-bottom:1px solid var(--border-color)}.guide-modal-header h2{margin:0;font-size:1.3rem;color:var(--color-yellow)}.btn-close-modal{background:none;border:none;color:var(--text-muted);cursor:pointer}.guide-tabs{display:flex;background-color:#151312;border-bottom:1px solid var(--border-color)}.tab-btn{flex:1;padding:12px;background:none;border:none;color:var(--text-muted);font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;font-size:.9rem;border-bottom:2px solid transparent}.tab-btn.active{color:var(--color-yellow);border-bottom-color:var(--color-yellow);background-color:#1e1b19}.guide-content{padding:24px;overflow-y:auto;flex:1}.guide-pane h3{margin-top:0;font-size:1.1rem;color:var(--text-light);border-left:4px solid var(--color-yellow);padding-left:8px}.guide-pane ul{padding-left:20px;color:var(--text-muted);line-height:1.6}.guide-pane li{margin-bottom:8px}.recipe-list{display:flex;flex-direction:column;gap:12px}.recipe-item{display:flex;align-items:center;gap:15px;background-color:#1e1b19;padding:12px;border-radius:8px;border:1px solid #332e2a}.recipe-icons{font-size:1.4rem;background-color:#0f0d0c;padding:8px;border-radius:8px;min-width:90px;text-align:center}.recipe-detail h4{margin:0 0 4px;font-size:.95rem;color:var(--text-light)}.recipe-detail p{margin:0;font-size:.8rem;color:var(--text-muted)}.enemy-list{display:flex;flex-direction:column;gap:12px}.enemy-profile{display:flex;align-items:center;gap:15px;background-color:#1e1b19;padding:12px;border-radius:8px;border:1px solid #332e2a}.enemy-avatar{width:24px;height:24px;border-radius:50%;display:inline-block;flex-shrink:0}.enemy-detail h4{margin:0 0 4px;font-size:.95rem;color:var(--text-light)}.enemy-detail p{margin:0;font-size:.8rem;color:var(--text-muted)}.guide-modal-footer{padding:16px 24px;border-top:1px solid var(--border-color);display:flex;justify-content:flex-end}.gameover-header{margin-bottom:25px}.gameover-icon{width:64px;height:64px;margin-bottom:15px}.results-box{background-color:#1e1b19;border-radius:12px;padding:20px;margin-bottom:25px}.result-row{display:flex;justify-content:space-between;font-size:1.1rem;margin-bottom:10px}.result-row:last-child{margin-bottom:0}.result-val{font-weight:700}.new-record{display:flex;align-items:center;justify-content:center;gap:8px;color:var(--color-yellow);font-weight:700;margin-top:15px;font-size:.95rem}@keyframes pop{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}.animate-pop{animation:pop .3s cubic-bezier(.34,1.56,.64,1) forwards}