:root{--primary-bg: #ffffff;--secondary-bg: #f8f9fa;--border-color: #dee2e6;--text-color: #212529;--text-muted: #6c757d;--header-color: #343a40;--accent-color: #007bff;--accent-color-hover: #0056b3;--highlight-bg: rgba(40, 167, 69, .1);--highlight-border: #28a745;--unmatched-bg: rgba(220, 53, 69, .1);--unmatched-border: #dc3545;--inserted-bg: rgba(23, 162, 184, .1);--inserted-border: #17a2b8;--updated-bg: rgba(255, 193, 7, .15);--updated-border: #ffc107;--cell-updated-border: #e8a800;--code-bg: #f1f3f5;--code-border: #ced4da;--shadow-color: rgba(0, 0, 0, .05);--theme-toggle-bg: #f1f3f5;--theme-toggle-icon: #495057}[data-theme=dark]{--primary-bg: #1a202c;--secondary-bg: #171923;--border-color: #2d3748;--text-color: #e2e8f0;--text-muted: #a0aec0;--header-color: #cbd5e0;--accent-color: #4299e1;--accent-color-hover: #2b6cb0;--highlight-bg: rgba(72, 187, 120, .15);--highlight-border: #48bb78;--unmatched-bg: rgba(245, 101, 101, .15);--unmatched-border: #f56565;--inserted-bg: rgba(45, 206, 221, .15);--inserted-border: #2dcedd;--updated-bg: rgba(246, 173, 85, .15);--updated-border: #f6ad55;--cell-updated-border: #dd6b20;--code-bg: #2d3748;--code-border: #4a5568;--shadow-color: rgba(0, 0, 0, .2);--theme-toggle-bg: #2d3748;--theme-toggle-icon: #e2e8f0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;padding:0;background-color:var(--secondary-bg);color:var(--text-color);line-height:1.6;transition:background-color .2s ease-in-out,color .2s ease-in-out}#root{max-width:900px;margin:2rem auto;padding:1rem}h1,h2{color:var(--header-color);text-align:center;margin-bottom:1.5rem}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}header h1{margin-bottom:0;font-size:2rem}.theme-toggle{background-color:var(--theme-toggle-bg);border:1px solid var(--border-color);border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background-color .2s ease,border-color .2s ease}.theme-toggle:hover{border-color:var(--accent-color)}.theme-toggle svg{color:var(--theme-toggle-icon);width:20px;height:20px}footer p{text-align:center;margin-top:3rem;color:var(--text-muted)}.tabs{display:flex;gap:.5rem;border-bottom:2px solid var(--border-color);margin-bottom:2.5rem}.tab-button{padding:.75rem 1.5rem;border:none;background-color:transparent;color:var(--text-muted);cursor:pointer;font-size:1.1rem;font-weight:600;border-bottom:3px solid transparent;transform:translateY(2px);transition:color .2s ease,border-color .2s ease}.tab-button:hover{color:var(--text-color)}.tab-button.active{color:var(--accent-color);border-bottom-color:var(--accent-color)}.tab-content{animation:fadeIn .5s ease-out forwards}.controls{display:flex;gap:1.5rem;margin-bottom:2.5rem;background-color:var(--primary-bg);padding:1.5rem;border-radius:12px;border:1px solid var(--border-color);box-shadow:0 4px 6px -1px var(--shadow-color);flex-wrap:wrap}.control-group{flex:1;min-width:250px;display:flex;flex-direction:column}label{font-weight:600;margin-bottom:.5rem;font-size:.9rem;color:var(--text-muted)}select{padding:.75rem 1rem;border-radius:8px;border:1px solid var(--border-color);background-color:var(--primary-bg);color:var(--text-color);font-size:1rem;width:100%;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right 1rem center;background-size:1em;transition:border-color .2s ease,box-shadow .2s ease}select:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 3px #007bff40}.visualization{margin-top:2rem}.step{background-color:var(--primary-bg);border:1px solid var(--border-color);border-left:4px solid var(--accent-color);border-radius:8px;margin-bottom:2rem;padding:1.5rem 2rem;box-shadow:0 4px 6px -1px var(--shadow-color);opacity:0;transform:translateY(20px);transition:opacity .5s ease-out,transform .5s ease-out}.step.visible{opacity:1;transform:translateY(0)}.step-explanation{font-size:1.1rem;margin-bottom:1rem;color:var(--text-color)}.step-query{background-color:var(--code-bg);border:1px solid var(--code-border);border-radius:6px;padding:1rem;margin-bottom:1.5rem;white-space:pre-wrap;word-wrap:break-word}.step-query code{font-family:JetBrains Mono,SFMono-Regular,Consolas,Liberation Mono,Menlo,Courier,monospace;font-size:.95rem;color:var(--text-color)}.step-message{text-align:center;font-size:1.1rem;font-style:italic;color:var(--text-muted);padding:1rem;background-color:var(--secondary-bg);border-radius:8px}.tables-container{display:flex;gap:2rem;overflow-x:auto;flex-wrap:wrap;justify-content:center}.table-wrapper{margin-bottom:1rem;opacity:0;transform:translateY(20px) scale(.98);transition:opacity .4s ease-out,transform .4s ease-out}.step.visible .table-wrapper{opacity:1;transform:translateY(0) scale(1)}h3{text-align:center;font-weight:600;margin-bottom:1rem;color:var(--header-color)}table{border-collapse:collapse;width:100%;min-width:300px;font-size:.95rem;box-shadow:0 2px 4px var(--shadow-color);border-radius:8px;overflow:hidden}th,td{border:none;border-bottom:1px solid var(--border-color);padding:.85rem 1rem;text-align:left}th{background-color:var(--secondary-bg);font-weight:600}tbody tr:last-child td{border-bottom:none}tr.highlight{background-color:var(--highlight-bg)}tr.highlight td{border-left:3px solid var(--highlight-border)}tr.highlight td:first-child{border-top-left-radius:3px;border-bottom-left-radius:3px}tr.unmatched{background-color:var(--unmatched-bg)}tr.unmatched td{border-left:3px solid var(--unmatched-border)}tr.unmatched td:first-child{border-top-left-radius:3px;border-bottom-left-radius:3px}tr.inserted{background-color:var(--inserted-bg)}tr.inserted td{border-left:3px solid var(--inserted-border)}tr.inserted td:first-child{border-top-left-radius:3px;border-bottom-left-radius:3px}tr.updated{background-color:var(--updated-bg)}tr.updated td{border-left:3px solid var(--updated-border)}tr.updated td:first-child{border-top-left-radius:3px;border-bottom-left-radius:3px}td.cell-updated{box-shadow:inset 0 0 0 2px var(--cell-updated-border);border-radius:4px}td.null-value{color:var(--text-muted);font-style:italic}.topic-description{background-color:var(--primary-bg);border:1px solid var(--border-color);border-left:4px solid var(--accent-color);border-radius:8px;margin-bottom:2.5rem;padding:1.5rem 2rem;box-shadow:0 4px 6px -1px var(--shadow-color);opacity:0;animation:fadeIn .5s ease-out forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.topic-description h3{margin-top:0;color:var(--header-color)}.topic-description h4{margin-top:1.5rem;margin-bottom:.5rem;color:var(--text-muted);font-weight:600;font-size:.9rem;text-transform:uppercase}.topic-description p{margin-bottom:0}.topic-description pre{background-color:var(--code-bg);border:1px solid var(--code-border);border-radius:6px;padding:1rem;white-space:pre-wrap;word-wrap:break-word;margin-top:.5rem}.topic-description pre code{font-family:JetBrains Mono,SFMono-Regular,Consolas,Liberation Mono,Menlo,Courier,monospace;font-size:.95rem;color:var(--text-color)}.ai-explanation-content{margin-top:2rem;padding:1.5rem 2rem;background-color:var(--primary-bg);border:1px solid var(--border-color);border-radius:12px;animation:fadeIn .4s ease-out;box-shadow:0 4px 6px -1px var(--shadow-color)}.ai-explanation-content>h3:first-of-type{margin-top:0;margin-bottom:1rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color);text-align:left}.ai-explanation-content div h1,.ai-explanation-content div h2,.ai-explanation-content div h3{margin-top:2rem;margin-bottom:1rem;padding-top:1.5rem;border-top:1px solid var(--border-color);color:var(--header-color);text-align:left}.ai-explanation-content div>*:first-child{margin-top:0;padding-top:0;border-top:none}.ai-explanation-content p{margin:0 0 1.25rem;line-height:1.7;color:var(--text-color)}.ai-explanation-content ul{padding-left:2rem;margin:0 0 1.25rem;list-style:disc}.ai-explanation-content li{margin-bottom:.75rem;padding-left:.5rem}.ai-explanation-content li::marker{color:var(--accent-color)}.ai-explanation-content p:last-child,.ai-explanation-content ul:last-child{margin-bottom:0}.ai-explanation-content code{font-family:JetBrains Mono,SFMono-Regular,Consolas,Liberation Mono,Menlo,Courier,monospace;background-color:var(--code-bg);padding:.2em .4em;margin:0;font-size:85%;border-radius:3px;border:1px solid var(--code-border)}.ai-explanation-content pre{background-color:var(--code-bg);border:1px solid var(--code-border);border-radius:6px;padding:1rem;white-space:pre-wrap;word-wrap:break-word;margin:1.25rem 0}.ai-explanation-content pre code{background-color:transparent;padding:0;margin:0;font-size:inherit;border:none}.error-message{margin-top:1rem;color:var(--unmatched-border);font-size:.9rem}.query-explainer{background-color:var(--primary-bg);border:1px solid var(--border-color);border-radius:12px;padding:2rem;box-shadow:0 4px 6px -1px var(--shadow-color)}.query-explainer h2{margin-top:0}.query-explainer>p{text-align:center;color:var(--text-muted);margin-bottom:1.5rem;max-width:60ch;margin-left:auto;margin-right:auto}.explainer-input-area{display:flex;flex-direction:column;gap:1rem;margin-bottom:1.5rem}.query-explainer textarea{width:100%;padding:1rem;border-radius:8px;border:1px solid var(--border-color);background-color:var(--secondary-bg);color:var(--text-color);font-family:JetBrains Mono,SFMono-Regular,Consolas,Liberation Mono,Menlo,Courier,monospace;font-size:1rem;resize:vertical;min-height:100px;box-sizing:border-box;transition:border-color .2s ease,box-shadow .2s ease}.query-explainer textarea:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 3px #007bff40}.explainer-input-area button{background-color:var(--accent-color);color:#fff;border:none;padding:.8rem 1.5rem;font-size:1rem;font-weight:600;border-radius:8px;cursor:pointer;transition:background-color .2s ease;align-self:center}.explainer-input-area button:hover:not(:disabled){background-color:var(--accent-color-hover)}.explainer-input-area button:disabled{background-color:var(--text-muted);cursor:not-allowed}.query-explainer .error-message{text-align:center}.loading-container{display:flex;flex-direction:column;align-items:center;gap:1rem;margin:2rem 0;color:var(--text-muted)}.spinner{width:40px;height:40px;border:4px solid var(--border-color);border-top-color:var(--accent-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.dynamic-visualizer{margin-top:3rem;background-color:var(--primary-bg);border:1px solid var(--border-color);border-radius:12px;padding:1.5rem 2rem;box-shadow:0 4px 6px -1px var(--shadow-color)}.dynamic-visualizer-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.dynamic-visualizer h2{text-align:left;margin:0;padding:0;border:none}.start-animation-btn{background-color:var(--accent-color);color:#fff;border:none;padding:.6rem 1.2rem;font-size:.95rem;font-weight:600;border-radius:8px;cursor:pointer;transition:background-color .2s ease,transform .2s ease;display:flex;align-items:center;gap:.5rem}.start-animation-btn:hover{background-color:var(--accent-color-hover);transform:translateY(-2px)}.dynamic-tables-container{display:flex;gap:2rem;overflow-x:auto;padding:1rem .5rem;min-height:250px;scroll-behavior:smooth}.dynamic-table-wrapper{flex-shrink:0;opacity:0;animation:slideInFromRight .8s ease-out forwards}.dynamic-table-wrapper .table-wrapper{opacity:1;transform:none;transition:none;animation:none;margin-bottom:0}@keyframes slideInFromRight{0%{opacity:0;transform:translate(50px)}to{opacity:1;transform:translate(0)}}