.app{min-height:100vh;display:flex;flex-direction:column}.app-header{background:var(--text-primary);color:#fff;padding:2rem;text-align:center;box-shadow:0 4px 6px #0000001a}.app-header h1{font-size:2.5rem;margin-bottom:.5rem;font-weight:700}.app-header p{font-size:1.1rem;opacity:.9}.app-content{flex:1;max-width:1400px;width:100%;margin:0 auto;padding:2rem}.app-footer{background:var(--text-primary);color:#fff;text-align:center;padding:1.5rem;margin-top:3rem}.app-footer p{margin:0;font-size:.9rem;opacity:.8}.btn{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 2px 4px #0000001a}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:var(--primary-color);color:#fff}.btn-primary:hover:not(:disabled){background:#357abd;transform:translateY(-2px);box-shadow:0 4px 8px #00000026}.btn-secondary{background:var(--secondary-color);color:#fff}.btn-secondary:hover:not(:disabled){background:#45b369;transform:translateY(-2px);box-shadow:0 4px 8px #00000026}.controls-section{background:var(--card-background);padding:2rem;border-radius:12px;box-shadow:var(--shadow);margin-bottom:2rem}.controls-section h2{margin-bottom:1rem;color:var(--text-primary)}.controls-section p{color:var(--text-secondary);margin-bottom:1.5rem}.control-group{display:flex;gap:1.5rem;margin-bottom:1.5rem;flex-wrap:wrap}.control-group label{display:flex;flex-direction:column;gap:.5rem;font-weight:500;flex:1;min-width:200px}.control-group select,.control-group input{padding:.6rem;border:1px solid var(--border-color);border-radius:6px;font-size:1rem;font-family:inherit;background:#fff}.control-group select:focus,.control-group input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #4a90e21a}.button-group{display:flex;gap:1rem;flex-wrap:wrap}.error-message{background:#fee;color:var(--danger-color);padding:1rem;border-radius:8px;margin-bottom:1rem;border-left:4px solid var(--danger-color)}.info-box{background:#e3f2fd;padding:1rem;border-radius:8px;margin-bottom:1rem;border-left:4px solid var(--primary-color)}.loading-indicator{text-align:center;padding:3rem}.spinner{border:4px solid #f3f3f3;border-top:4px solid var(--primary-color);border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite;margin:0 auto 1rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.canvas-container{display:flex;gap:2rem;flex-wrap:wrap;justify-content:center;margin-top:2rem}@media (max-width: 768px){.app-header h1{font-size:1.8rem}.control-group,.canvas-container{flex-direction:column}}.tabs-navigation{display:flex;background:var(--card-background);padding:.5rem;border-radius:12px;box-shadow:var(--shadow);max-width:800px;margin:-1rem auto 2rem;gap:.5rem}.tab-button{flex:1;padding:1rem 2.5rem;min-width:180px;border:none;background:transparent;color:var(--text-secondary);font-size:1rem;font-weight:600;cursor:pointer;border-radius:8px;transition:all .3s ease;position:relative;white-space:nowrap}.tab-button:hover{background:#4a90e21a;color:var(--primary-color)}.tab-button.active{background:var(--primary-color);color:#fff;box-shadow:0 2px 8px #4a90e24d}@media (max-width: 768px){.tabs-navigation{flex-direction:column;margin:1rem}.tab-button{width:100%}}.puzzle-canvas{background:var(--card-background);padding:1.5rem;border-radius:12px;box-shadow:var(--shadow);flex:1;min-width:400px;max-width:600px;animation:fadeIn .4s ease-in}.puzzle-canvas h3{margin-bottom:1rem;color:var(--text-primary);text-align:center;font-size:1.2rem;font-weight:600}.image-container{border:2px solid var(--border-color);border-radius:8px;overflow:hidden;background:#fafafa;display:flex;align-items:center;justify-content:center;min-height:300px}.image-container img{width:100%;height:auto;display:block;transition:transform .3s ease}.image-container img:hover{transform:scale(1.02)}@keyframes fadeIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@media (max-width: 768px){.puzzle-canvas{min-width:100%}}.simulation-tab{animation:fadeIn .3s ease-in}.solution-steps{background:var(--card-background);padding:1.5rem;border-radius:12px;box-shadow:var(--shadow);margin-bottom:2rem}.solution-steps h3{margin-bottom:1rem;color:var(--text-primary)}.progress-bar{height:8px;background:#e0e0e0;border-radius:4px;overflow:hidden;margin-bottom:1rem}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));transition:width .5s ease;border-radius:4px}.steps-list{list-style:none;padding:0}.steps-list li{padding:.75rem;margin-bottom:.5rem;border-radius:6px;background:#f9f9f9;color:var(--text-secondary);transition:all .3s ease;border-left:3px solid transparent}.steps-list li.completed{background:#e8f5e9;color:var(--secondary-color);border-left-color:var(--secondary-color);font-weight:500}.benchmark-tab{animation:fadeIn .3s ease-in}.results-section{animation:slideUp .4s ease-out}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-bottom:2rem}.stat-card{background:var(--card-background);padding:2rem;border-radius:12px;box-shadow:var(--shadow);text-align:center;border-top:4px solid var(--primary-color);transition:transform .3s ease}.stat-card:hover{transform:translateY(-4px);box-shadow:0 4px 12px #00000026}.stat-label{font-size:.9rem;color:var(--text-secondary);margin-bottom:.5rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.stat-value{font-size:2.5rem;font-weight:700;color:var(--primary-color);margin-bottom:.5rem}.stat-detail{font-size:.85rem;color:var(--text-secondary)}.runs-table{background:var(--card-background);padding:2rem;border-radius:12px;box-shadow:var(--shadow);margin-top:2rem;overflow-x:auto}.runs-table h4{margin-bottom:1rem;color:var(--text-primary)}.runs-table table{width:100%;border-collapse:collapse}.runs-table th,.runs-table td{padding:1rem;text-align:left;border-bottom:1px solid var(--border-color)}.runs-table th{background:#f9f9f9;font-weight:600;color:var(--text-primary)}.runs-table tr:hover{background:#f9f9f9}.runs-table .status{padding:.25rem .75rem;border-radius:20px;font-size:.85rem;font-weight:600}.runs-table .status.success{background:#e8f5e9;color:var(--secondary-color)}.runs-table .status.failed{background:#ffebee;color:var(--danger-color)}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.file-upload{margin:1.5rem 0}.drop-zone{border:3px dashed var(--border-color);border-radius:12px;padding:3rem 2rem;text-align:center;cursor:pointer;transition:all .3s ease;background:#fafafa}.drop-zone:hover{border-color:var(--primary-color);background:#f0f7ff}.drop-zone.drag-over{border-color:var(--primary-color);background:#e3f2fd;transform:scale(1.02)}.drop-zone-content{display:flex;flex-direction:column;align-items:center;gap:1rem}.upload-icon{width:64px;height:64px;color:var(--primary-color);opacity:.7}.drop-zone-text{font-size:1.1rem;font-weight:600;color:var(--text-primary)}.drop-zone-hint{font-size:.9rem;color:var(--text-secondary)}.drop-zone:hover .upload-icon{opacity:1;transform:translateY(-4px);transition:all .3s ease}.photo-input-tab{animation:fadeIn .3s ease-in}.pieces-info{background:var(--card-background);padding:2rem;border-radius:12px;box-shadow:var(--shadow);margin-bottom:2rem}.pieces-info h3{margin-bottom:1.5rem;color:var(--text-primary)}.pieces-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}.piece-card{background:#f9f9f9;padding:1rem;border-radius:8px;border:2px solid var(--border-color);transition:all .3s ease}.piece-card:hover{border-color:var(--primary-color);box-shadow:0 2px 8px #4a90e233;transform:translateY(-2px)}.piece-header{font-weight:700;font-size:1.1rem;color:var(--primary-color);margin-bottom:.75rem;padding-bottom:.5rem;border-bottom:2px solid var(--border-color)}.piece-details{font-size:.9rem;color:var(--text-secondary)}.piece-details p{margin-bottom:.25rem}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}:root{--primary-color: #4a90e2;--secondary-color: #50c878;--danger-color: #e74c3c;--background: #f5f7fa;--card-background: #ffffff;--text-primary: #2c3e50;--text-secondary: #7f8c8d;--border-color: #e0e0e0;--shadow: 0 2px 8px rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--background);color:var(--text-primary);line-height:1.6}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}button{font-family:inherit}