@import"https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Orbitron:wght@500;700;900&display=swap";:root{--bg: #0A0014;--surface: #1A0028;--primary: #00F5FF;--primary-dark: #00C2D1;--accent: #FF006E;--text: #F0F0FF;--text-muted: #A8A8C8;--text-dark: #0A0A0A;--border: #2A1845;--success: #10B981;--warning: #F59E0B;--danger: #FF006E;--radius: 4px;--shadow: 0 12px 36px rgba(0,0,0,.4), 0 0 28px #00F5FF26}body{margin:0;padding:0;background:linear-gradient(135deg,#0a0014,#1a0028),repeating-linear-gradient(0deg,transparent,transparent 39px,#00F5FF11 40px),repeating-linear-gradient(90deg,transparent,transparent 39px,#FF006E08 40px),var(--bg);color:var(--text);font-family:JetBrains Mono,SF Mono,Consolas,monospace;display:flex;justify-content:center;align-items:center;min-height:100vh;overflow:hidden;position:relative}.app-container{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;max-width:900px;max-height:95vh;overflow-y:auto;box-sizing:border-box;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem;position:relative;border:1px solid var(--border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background-color:#1a0028d9}button{background:var(--primary);color:var(--text);border:none;border-radius:var(--radius);padding:.8rem 1.5rem;font-size:1.1rem;cursor:pointer;transition:all .2s ease-in-out;box-shadow:0 0 15px var(--primary);display:flex;align-items:center;gap:.5rem;font-family:JetBrains Mono,monospace;text-transform:uppercase}button:hover{background:var(--primary-dark);box-shadow:0 0 20px var(--primary-dark);transform:translateY(-2px)}button:active{transform:translateY(0);box-shadow:0 0 10px var(--primary)}button.active{background:var(--accent);color:var(--text);box-shadow:0 0 15px var(--accent)}.back-button{background:none;border:1px solid var(--border);color:var(--text-muted);padding:.6rem 1rem;font-size:1rem;box-shadow:none}.back-button:hover{background:#00f5ff1a;color:var(--text);transform:translateY(-1px);box-shadow:0 0 8px var(--primary)}.start-screen{display:flex;flex-direction:column;align-items:center;gap:1.5rem;width:100%;padding:1rem}.game-title{font-family:Orbitron,JetBrains Mono,monospace;font-size:3.5rem;color:var(--primary);text-shadow:0 0 20px var(--accent);margin-bottom:1rem;letter-spacing:2px}.cloud-status{font-size:.9rem;color:var(--text-muted);margin-top:-1rem;margin-bottom:1rem}.game-mode-selection{text-align:center;margin-bottom:1.5rem}.game-mode-selection h3{font-family:Orbitron,monospace;font-size:1.5rem;color:var(--text);margin-bottom:1rem}.mode-buttons{display:flex;flex-wrap:wrap;justify-content:center;gap:.8rem}.mode-buttons button{background:var(--border);color:var(--text-muted);font-size:.95rem;padding:.6rem 1.2rem;box-shadow:inset 0 1px 3px #0003,0 0 5px #00f5ff1a}.mode-buttons button:hover{background:#00f5ff1a;color:var(--text);box-shadow:inset 0 1px 3px #0003,0 0 10px var(--primary)}.mode-buttons button.active{background:var(--primary);color:var(--text);box-shadow:0 0 15px var(--primary)}.start-button{background:var(--primary);font-size:1.3rem;padding:1rem 2.5rem;margin-top:1rem}.shop-button{background:var(--accent);color:var(--text);font-size:1.1rem;padding:.8rem 2rem;box-shadow:0 0 15px var(--accent)}.shop-button:hover{background:#e60064;box-shadow:0 0 20px #e60064}.score-display{display:flex;align-items:center;gap:.5rem;font-size:1.1rem;color:var(--text-muted);margin-top:1.5rem}.game-container{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:100%;flex-grow:1;flex-shrink:1;overflow-y:auto;padding:.5rem}.game-header{display:flex;justify-content:space-between;align-items:center;width:100%;padding:.5rem 1rem;background:var(--border);border-radius:var(--radius);box-shadow:var(--shadow);flex-shrink:0;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background-color:#2a1845b3}.player-info{display:flex;align-items:center;gap:.5rem;font-size:1.1rem;color:var(--text)}.current-player-piece-wrapper{width:28px;height:28px;vertical-align:middle;display:flex;justify-content:center;align-items:center}.ai-thinking{font-size:.9rem;color:var(--text-muted);margin-left:.5rem;animation:pulse 1.5s infinite alternate}@keyframes pulse{0%{opacity:.6}to{opacity:1}}.score-info{display:flex;align-items:center;gap:.5rem;font-size:1rem;color:var(--text-muted)}.gobang-board{display:grid;grid-template-columns:repeat(15,1fr);grid-template-rows:repeat(15,1fr);width:min(750px,90vw);height:min(750px,90vw);max-width:calc(95vh - 200px);max-height:calc(95vh - 200px);aspect-ratio:1 / 1;border:2px solid var(--border);border-radius:var(--radius);overflow:hidden;position:relative;box-shadow:inset 0 0 15px #00000080,0 0 20px var(--primary-dark);margin:1rem 0;flex-shrink:0;background-color:#1a002899;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.board-classic{background-image:linear-gradient(to right,rgba(0,245,255,.1) 1px,transparent 1px),linear-gradient(to bottom,rgba(0,245,255,.1) 1px,transparent 1px);background-size:calc(100% / 15) calc(100% / 15);background-origin:content-box;background-position:center center}.board-row{display:contents}.board-cell{width:100%;height:100%;display:flex;justify-content:center;align-items:center;position:relative;box-sizing:border-box}.gobang-board:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background-image:linear-gradient(to right,var(--border) 1px,transparent 1px),linear-gradient(to bottom,var(--border) 1px,transparent 1px);background-size:calc(100% / 14) calc(100% / 14);background-position:calc(100% / 28) calc(100% / 28);pointer-events:none;z-index:1}.board-cell:not(.occupied):hover:after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:80%;height:80%;border-radius:50%;background-color:#00f5ff26;pointer-events:none;z-index:2}.piece-wrapper{width:100%;height:100%;display:flex;justify-content:center;align-items:center}.piece-wrapper img{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 0 8px rgba(0,245,255,.5))}.game-controls{margin-top:1rem;flex-shrink:0}.restart-button{background:var(--warning);color:var(--text-dark);box-shadow:0 0 15px var(--warning)}.restart-button:hover{background:#d18900;box-shadow:0 0 20px #d18900}.game-over-screen{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:1rem;text-align:center}.game-over-title{font-family:Orbitron,JetBrains Mono,monospace;font-size:3rem;color:var(--primary);text-shadow:0 0 15px var(--primary);margin-bottom:1rem}.winner-display{display:flex;flex-direction:column;align-items:center;gap:.8rem;font-size:1.8rem;color:var(--text);margin-bottom:1.5rem}.winner-piece{margin-top:.5rem;width:60px;height:60px;display:flex;justify-content:center;align-items:center}.game-over-actions{display:flex;gap:1rem;margin-top:1rem}.play-again-button{background:var(--primary)}.back-to-menu-button{background:var(--border);color:var(--text-muted);box-shadow:0 0 10px var(--border)}.back-to-menu-button:hover{background:#2a184580;box-shadow:0 0 15px var(--border)}.shop-screen{width:100%;padding:1rem;flex-grow:1;overflow-y:auto}.shop-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;border-bottom:1px solid var(--border);flex-shrink:0}.shop-header h2{font-family:Orbitron,monospace;font-size:2rem;color:var(--accent);text-shadow:0 0 10px var(--accent);display:flex;align-items:center;gap:.8rem}.current-score{display:flex;align-items:center;gap:.5rem;font-size:1.1rem;color:var(--text-muted)}.shop-items-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1.5rem}.shop-item-card{background:var(--border);border-radius:var(--radius);padding:1.5rem 1rem;display:flex;flex-direction:column;align-items:center;gap:.8rem;box-shadow:var(--shadow);transition:all .2s ease-in-out;border:1px solid rgba(0,245,255,.1);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background-color:#2a184599}.shop-item-card:hover{box-shadow:0 0 20px var(--primary);transform:translateY(-5px)}.item-preview{display:flex;gap:10px;margin-bottom:.5rem;height:60px;align-items:center}.item-preview svg{width:50px;height:50px}.board-preview{width:120px;height:60px;border-radius:var(--radius);display:flex;justify-content:center;align-items:center;font-size:2rem;overflow:hidden;box-shadow:inset 0 0 5px #0000004d;background-color:#0003;color:var(--text-muted);border:1px solid var(--border)}.board-preview img{width:100%;height:100%;object-fit:cover}.shop-item-card h3{font-size:1.3rem;color:var(--text);margin:0}.buy-button{background:var(--success);color:var(--text);font-size:.9rem;padding:.6rem 1rem;box-shadow:0 0 10px var(--success)}.buy-button:hover{background:#0c8a60;box-shadow:0 0 15px #0c8a60}.equip-button{background:var(--primary-dark);font-size:.9rem;padding:.6rem 1rem;box-shadow:0 0 10px var(--primary-dark)}.equip-button.equipped{background:var(--text-muted);color:var(--surface);cursor:default;box-shadow:none}.equip-button.equipped:hover{background:var(--text-muted);transform:none;box-shadow:none}.toast-message{position:fixed;bottom:2rem;left:50%;transform:translate(-50%);background:#000000b3;color:var(--text);padding:.8rem 1.5rem;border-radius:var(--radius);box-shadow:var(--shadow);z-index:1000;font-size:1rem;white-space:nowrap;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;position:fixed;top:0;left:0;width:100%;height:100%;background:var(--bg);color:var(--text);font-size:1.2rem;z-index:9999}.spinner{border:4px solid rgba(255,255,255,.3);border-top:4px solid var(--accent);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin-bottom:1rem}.spinner.small{width:20px;height:20px;border-width:3px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.saving-indicator{position:absolute;top:1rem;right:1rem;display:flex;align-items:center;gap:.5rem;color:var(--text-muted);font-size:.9rem}@media (max-width: 768px){.app-container{padding:1rem}.game-title{font-size:2.5rem}.gobang-board{width:min(600px,95vw);height:min(600px,95vw);max-width:calc(98vh - 180px);max-height:calc(98vh - 180px)}.game-header,.game-controls{padding:.3rem .5rem}.player-info,.score-info{font-size:.9rem}.shop-items-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}.shop-header h2{font-size:1.5rem}}@media (max-width: 480px){.game-title{font-size:1.8rem}.gobang-board{width:min(400px,98vw);height:min(400px,98vw);max-width:calc(98vh - 150px);max-height:calc(98vh - 150px)}button{font-size:.9rem;padding:.5rem .8rem}.player-info,.score-info{font-size:.9rem}.shop-item-card h3{font-size:1.1rem}}