*{margin:0;padding:0;box-sizing:border-box}:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}body{margin:0;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);padding:20px}.playground-root{min-height:100vh}.container{max-width:1400px;margin:0 auto}header{text-align:center;color:#fff;margin-bottom:30px}header h1{font-size:3em;font-weight:700;margin-bottom:10px;text-shadow:2px 2px 4px rgba(0,0,0,.2);display:flex;align-items:center;justify-content:center;gap:10px}.subtitle{font-size:1.2em;opacity:.9}.main-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:20px}.panel{background:#fff;border-radius:12px;box-shadow:0 8px 32px #0000001a;overflow:hidden;display:flex;flex-direction:column}.panel-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:15px 20px;font-weight:600;font-size:1.1em;display:flex;justify-content:space-between;align-items:center}.panel-content{padding:20px;height:500px;display:flex;flex-direction:column}textarea{flex:1;width:100%;border:2px solid #e0e0e0;border-radius:8px;padding:15px;font-family:Consolas,Monaco,Courier New,monospace;font-size:14px;resize:none;outline:none;transition:border-color .3s}textarea:focus{border-color:#667eea}.stats{display:flex;align-items:center;gap:12px;font-size:.9em;color:#fff}.stat{background:#fff3;padding:4px 12px;border-radius:4px;white-space:nowrap}.compactness-indicator{display:flex;align-items:center;gap:8px;padding:6px 10px;border-radius:6px;font-size:12px;font-weight:600;cursor:help;transition:all .2s ease;min-width:140px}.compactness-bar{width:60px;height:6px;background:#e5e7eb;border-radius:3px;overflow:hidden}.compactness-fill{height:100%;border-radius:3px;transition:width .3s ease}.compactness-text{display:flex;align-items:center;gap:4px;white-space:nowrap}.efficiency-badge{font-size:10px;padding:2px 6px;border-radius:10px;background:#fff3;text-transform:capitalize}.compactness-indicator.positive.excellent{background:#10b9811a;color:#10b981;border:1px solid rgba(16,185,129,.3)}.compactness-indicator.positive.good{background:#22c55e1a;color:#22c55e;border:1px solid rgba(34,197,94,.3)}.compactness-indicator.positive.moderate{background:#eab3081a;color:#eab308;border:1px solid rgba(234,179,8,.3)}.compactness-indicator.positive.slight{background:#f59e0b1a;color:#f59e0b;border:1px solid rgba(245,158,11,.3)}.compactness-indicator.negative{background:#ef44441a;color:#dc2626;border:1px solid rgba(239,68,68,.3)}.compactness-indicator:hover{transform:scale(1.02)}.controls{background:#fff;border-radius:12px;box-shadow:0 8px 32px #0000001a;padding:20px;display:flex;flex-direction:column;gap:15px;margin-bottom:20px}.conversion-buttons,.file-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.file-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 20px;border-radius:8px;font-size:.9em;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 12px #667eea66;display:inline-block}.file-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea80}.options{display:flex;gap:20px;align-items:center;justify-content:center;flex-wrap:wrap}.performance{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.performance .stat{background:#f3f4f6;color:#374151;font-family:Consolas,Monaco,Courier New,monospace;font-size:.8em}button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 30px;border-radius:8px;font-size:1em;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 12px #667eea66}button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea80}button:active{transform:translateY(0)}button.secondary{background:#fff;color:#667eea;border:2px solid #667eea;box-shadow:0 4px 12px #667eea33}label{display:flex;align-items:center;gap:8px;font-weight:500;color:#333;cursor:pointer}input[type=checkbox]{width:18px;height:18px;cursor:pointer}select{padding:8px 12px;border:2px solid #e0e0e0;border-radius:6px;font-size:1em;cursor:pointer;outline:none;transition:border-color .3s;margin-left:8px}select:focus{border-color:#667eea}.history{background:#fff;border-radius:12px;box-shadow:0 8px 32px #0000001a;padding:20px;margin-bottom:20px}.history h3{color:#667eea;margin-bottom:15px;font-size:1.3em}.history-list{display:flex;flex-direction:column;gap:10px;max-height:200px;overflow-y:auto}.history-item{display:flex;align-items:center;gap:15px;padding:10px 15px;background:#f8fafc;border-radius:8px;border-left:4px solid #667eea}.history-direction{background:#667eea;color:#fff;padding:4px 8px;border-radius:4px;font-size:.8em;font-weight:600;min-width:80px;text-align:center}.history-preview{flex:1;font-family:Consolas,Monaco,Courier New,monospace;font-size:.9em;color:#64748b}.history-time{font-size:.8em;color:#94a3b8;min-width:80px;text-align:right}.examples{background:#fff;border-radius:12px;box-shadow:0 8px 32px #0000001a;padding:20px}.examples h3{color:#667eea;margin-bottom:15px;font-size:1.3em}.example-buttons{display:flex;gap:10px;flex-wrap:wrap}.example-btn{background:#f5f5f5;color:#333;border:2px solid #e0e0e0;padding:8px 16px;border-radius:6px;font-size:.9em;cursor:pointer;transition:all .2s}.example-btn:hover{background:#667eea;color:#fff;border-color:#667eea}.alert{margin-top:10px;padding:15px;border-radius:8px;font-family:Consolas,Monaco,Courier New,monospace;font-size:13px;white-space:pre-wrap}.alert.error{background:#fee;border:2px solid #fcc;color:#c00}.alert.success{background:#efe;border:2px solid #cfc;color:#060;text-align:center;font-weight:600}@media(max-width:1024px){.main-grid{grid-template-columns:1fr}header h1{font-size:2em}.options{flex-direction:column;gap:10px}}@media(max-width:768px){body{padding:10px}.controls{gap:10px}.conversion-buttons,.file-actions{flex-direction:column;align-items:center}.options{width:100%;flex-direction:column;align-items:flex-start}.compactness-indicator{min-width:120px;font-size:11px}.compactness-bar{width:40px}.history-item{flex-direction:column;align-items:flex-start;gap:8px}.history-direction{align-self:flex-start}.history-time{align-self:flex-end}}.history-list::-webkit-scrollbar{width:6px}.history-list::-webkit-scrollbar-track{background:#f1f1f1;border-radius:3px}.history-list::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:3px}.history-list::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.converting-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#ffffffe6;padding:10px 20px;border-radius:8px;font-weight:600;color:#667eea;z-index:10;box-shadow:0 4px 12px #0000001a}.panel-content{position:relative}button:disabled,.file-btn:disabled,label:has(input:disabled){opacity:.6;cursor:not-allowed;transform:none!important}button:disabled:hover,.file-btn:disabled:hover{transform:none;box-shadow:0 4px 12px #667eea66}textarea:disabled{background-color:#f8f9fa;cursor:not-allowed}.file-btn:disabled{background:#9ca3af;box-shadow:0 4px 12px #9ca3af66}.alert.success{background:#f0fdf4;border:2px solid #bbf7d0;color:#166534;text-align:left;font-weight:600;display:flex;align-items:center;gap:8px}.alert.success:before{content:"✓";font-weight:700;font-size:16px}.alert.error{background:#fef2f2;border:2px solid #fecaca;color:#dc2626;text-align:left}.alert.error:before{content:"⚠";font-weight:700;margin-right:8px}.performance{border-top:1px solid #e5e7eb;padding-top:10px;margin-top:10px}.performance .stat{background:#f8fafc;border:1px solid #e2e8f0;color:#475569;font-family:Consolas,Monaco,Courier New,monospace;font-size:.8em}
