:root {
            --neon-cyan: #00f3ff;
            --neon-blue: #0066ff;
            --neon-red: #ff0055;
            --neon-amber: #ffaa00;
            --neon-purple: #b537f2;
            --neon-green: #00ff88;
        }

        * {
            user-select: none;
            -webkit-user-select: none;
            box-sizing: border-box;
        }

        body, html {
            margin: 0;
            padding: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            background-color: #04070f;
            font-family: 'Noto Sans TC', 'JetBrains Mono', sans-serif;
            color: #e2f1ff;
        }

        .font-cyber {
            font-family: 'Orbitron', 'Noto Sans TC', sans-serif;
        }

        .font-mono-code {
            font-family: 'JetBrains Mono', monospace;
        }

        /* 全螢幕畫布 */
        #gameCanvas {
            display: block;
            width: 100vw;
            height: 100vh;
            background: radial-gradient(circle at center, #081226 0%, #03060c 100%);
        }

        /* 掃描線與 CRT 數位濾鏡 */
        .crt-overlay {
            background: linear-gradient(
                rgba(18, 16, 16, 0) 50%,
                rgba(0, 0, 0, 0.28) 50%
            ), linear-gradient(
                90deg,
                rgba(255, 0, 0, 0.02),
                rgba(0, 255, 0, 0.01),
                rgba(0, 0, 255, 0.02)
            );
            background-size: 100% 3px, 6px 100%;
            pointer-events: none;
        }

        /* 霓虹邊框與發光效果 */
        .cyber-panel {
            background: rgba(6, 13, 28, 0.86);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 243, 255, 0.35);
            box-shadow: 0 0 20px rgba(0, 243, 255, 0.12), inset 0 0 15px rgba(0, 243, 255, 0.05);
        }

        .cyber-panel-red {
            background: rgba(24, 6, 16, 0.88);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 0, 85, 0.5);
            box-shadow: 0 0 25px rgba(255, 0, 85, 0.25), inset 0 0 15px rgba(255, 0, 85, 0.08);
        }

        .cyber-btn {
            position: relative;
            background: linear-gradient(135deg, rgba(0, 243, 255, 0.16) 0%, rgba(0, 102, 255, 0.24) 100%);
            border: 1px solid rgba(0, 243, 255, 0.55);
            color: #e2f1ff;
            transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
            text-shadow: 0 0 8px rgba(0, 243, 255, 0.6);
        }

        .cyber-btn:hover {
            background: linear-gradient(135deg, rgba(0, 243, 255, 0.35) 0%, rgba(0, 102, 255, 0.45) 100%);
            border-color: #00f3ff;
            box-shadow: 0 0 18px rgba(0, 243, 255, 0.45), inset 0 0 8px rgba(0, 243, 255, 0.3);
            transform: translateY(-1px);
        }

        .cyber-btn:active {
            transform: translateY(1px);
        }

        .cyber-btn-active {
            background: linear-gradient(135deg, #00f3ff 0%, #0077ff 100%) !important;
            color: #02060d !important;
            font-weight: 800;
            text-shadow: none !important;
            box-shadow: 0 0 20px rgba(0, 243, 255, 0.75);
        }

        /* 晶片選擇卡片動畫 */
        .chip-card {
            background: linear-gradient(160deg, rgba(8, 20, 42, 0.95) 0%, rgba(4, 10, 22, 0.98) 100%);
            border: 1px solid rgba(0, 243, 255, 0.3);
            transition: all 0.22s ease;
        }
        .chip-card:hover {
            transform: translateY(-6px) scale(1.015);
            border-color: #00f3ff;
            box-shadow: 0 12px 30px -5px rgba(0, 243, 255, 0.35), inset 0 0 20px rgba(0, 243, 255, 0.12);
        }
        .chip-card.passive-card {
            border-color: rgba(0, 255, 136, 0.35);
        }
        .chip-card.passive-card:hover {
            border-color: #00ff88;
            box-shadow: 0 12px 30px -5px rgba(0, 255, 136, 0.35), inset 0 0 20px rgba(0, 255, 136, 0.12);
        }

        /* Glitch 閃爍文字動畫 */
        @keyframes glitchPulse {
            0%, 100% { text-shadow: -2px 0 #ff0055, 2px 0 #00f3ff; }
            25% { text-shadow: 2px 0 #ff0055, -2px 0 #00f3ff; }
            50% { text-shadow: -1px -1px #00ff88, 1px 1px #ff0055; }
            75% { text-shadow: 2px -1px #00f3ff, -2px 1px #ffaa00; }
        }

        .glitch-title {
            animation: glitchPulse 2.5s infinite;
        }

        /* 自訂捲軸 */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: rgba(4, 10, 22, 0.8);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 243, 255, 0.4);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 243, 255, 0.8);
        }