:root{--primary: #6366f1;--red: #ef4444;--black: #1f2937;--glass: rgba(255, 255, 255, .8)}body{margin:0;background:#f0f2f5;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:#1e293b}.app-container{display:flex;flex-direction:column;align-items:center;min-height:100vh;padding:20px}.glass-header{width:100%;max-width:1000px;background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding:15px 30px;border-radius:20px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 10px 25px #0000000d;margin-bottom:30px}.brand h1{margin:0;font-size:20px;display:flex;align-items:baseline;gap:10px}.brand span{font-size:14px;color:#64748b;font-weight:400}.sync-tag{font-size:11px;display:flex;align-items:center;gap:4px;margin-top:4px}.sync-tag.saved{color:#10b981}.sync-tag.saving{color:var(--primary)}.turn-badge{padding:8px 20px;border-radius:12px;font-weight:700;font-size:14px;box-shadow:0 4px 12px #0000001a}.turn-badge.red{background:#fee2e2;color:var(--red)}.turn-badge.black{background:#f3f4f6;color:var(--black)}.game-layout{display:flex;gap:40px;width:100%;max-width:1100px;justify-content:center}.board-container{padding:15px;background:#fff;border-radius:12px;box-shadow:0 20px 50px #00000026}.chess-board-art{position:relative;width:540px;height:600px;background-size:cover;background-position:center;border-radius:4px;overflow:hidden;transition:background-image .5s ease}.board-lines-svg{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1}.pieces-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(9,60px);grid-template-rows:repeat(10,60px)}.cell{width:60px;height:60px;display:flex;justify-content:center;align-items:center;cursor:pointer}.piece-disc{width:50px;height:50px;border-radius:50%;background:#f8fafc;display:flex;justify-content:center;align-items:center;box-shadow:0 4px 8px #0003,inset 0 -2px 4px #0000001a;border:2px solid #cbd5e1}.piece-disc.red{color:var(--red);border-color:var(--red)}.piece-disc.black{color:var(--black);border-color:var(--black)}.piece-char{font-size:28px;font-weight:700;font-family:Kaiti,STKaiti,serif}.sidebar{width:300px;display:flex;flex-direction:column;gap:20px}.skin-panel,.action-panel{background:var(--glass);padding:20px;border-radius:20px;box-shadow:0 4px 15px #0000000d}.skin-panel h3{margin:0 0 15px;display:flex;align-items:center;gap:8px;font-size:16px}.skin-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px}.skin-options button{padding:8px;border:1px solid #e2e8f0;background:#fff;border-radius:8px;font-size:13px;cursor:pointer;transition:all .2s}.skin-options button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.ai-generator{display:flex;flex-direction:column;gap:10px}.input-wrapper{position:relative;display:flex;align-items:center}.sparkle-icon{position:absolute;left:10px;color:var(--primary)}.ai-generator input{width:100%;padding:10px 10px 10px 35px;border:1px solid #e2e8f0;border-radius:10px;font-size:13px;outline:none}.gen-btn{background:linear-gradient(135deg,#6366f1,#a855f7);color:#fff;border:none;padding:12px;border-radius:10px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px}.gen-btn:disabled{opacity:.7;cursor:not-allowed}.reset-btn{width:100%;padding:12px;background:#fff;border:1px solid #fecaca;color:#ef4444;border-radius:10px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px}.win-modal{position:fixed;top:0;right:0;bottom:0;left:0;background:#000c;display:flex;justify-content:center;align-items:center;z-index:100}.win-content{background:#fff;padding:40px;border-radius:30px;text-align:center;max-width:400px}.trophy-icon{color:#fbbf24;margin-bottom:20px}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}