:root{--lc-tool:#6366f1;--lc-tool-dark:#4f46e5;--lc-gradient:linear-gradient(135deg,#6366f1 0%,#8b5cf6 100%);--lc-light:#eef2ff}[data-theme="dark"]{--lc-light:rgba(99,102,241,0.15)}.lc-layout.tool-page-container{grid-template-columns:minmax(250px,300px) 1fr 300px}@media (max-width:1024px){.lc-layout.tool-page-container{grid-template-columns:minmax(240px,290px) 1fr}}@media (max-width:900px){.lc-layout.tool-page-container{grid-template-columns:1fr}}.lc-mode-toggle{display:flex;border:1.5px solid var(--border);border-radius:0.5rem;overflow:hidden;margin-bottom:0.75rem}.lc-mode-btn{flex:1;padding:0.5rem 0.25rem;font-weight:600;font-size:0.65rem;border:none;cursor:pointer;background:var(--bg-secondary);color:var(--text-secondary);transition:all 0.15s;font-family:var(--font-sans);text-align:center}.lc-mode-btn.active{background:var(--lc-gradient);color:#fff}.lc-mode-btn:hover:not(.active){background:var(--bg-tertiary)}[data-theme="dark"] .lc-mode-btn{background:var(--bg-tertiary)}[data-theme="dark"] .lc-mode-btn.active{background:var(--lc-gradient);color:#fff}.lc-input-label{display:block;font-size:0.6875rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:0.05em;margin-bottom:0.25rem}.lc-input{width:100%;padding:0.5rem;font-size:0.875rem;font-family:var(--font-mono);border:1.5px solid var(--border);border-radius:0.375rem;background:var(--bg-primary);color:var(--text-primary);text-align:center;transition:border-color 0.15s}.lc-input:focus{outline:none;border-color:var(--lc-tool);box-shadow:0 0 0 2px rgba(99,102,241,0.1)}.lc-select{width:100%;padding:0.5rem;font-size:0.8125rem;font-family:var(--font-sans);border:1.5px solid var(--border);border-radius:0.375rem;background:var(--bg-primary);color:var(--text-primary);cursor:pointer;transition:border-color 0.15s}.lc-select:focus{outline:none;border-color:var(--lc-tool)}.lc-slider-row{display:flex;align-items:center;gap:0.5rem}.lc-slider-row .lc-input{width:80px;flex-shrink:0}.lc-slider{flex:1;-webkit-appearance:none;appearance:none;height:4px;border-radius:2px;background:var(--border);outline:none}.lc-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--lc-tool);cursor:pointer;border:2px solid #fff;box-shadow:0 1px 3px rgba(0,0,0,0.2)}.lc-slider::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--lc-tool);cursor:pointer;border:2px solid #fff;box-shadow:0 1px 3px rgba(0,0,0,0.2)}.lc-2col{display:grid;grid-template-columns:1fr 1fr;gap:0.5rem}@media (max-width:400px){.lc-2col{grid-template-columns:1fr}}.lc-toggle-row{display:flex;align-items:center;gap:0.4rem;cursor:pointer}.lc-toggle-row input[type="checkbox"]{width:14px;height:14px;accent-color:var(--lc-tool);cursor:pointer}.lc-layout .tool-card-body{padding:0.75rem}.lc-layout .tool-card-header{padding:0.625rem 0.75rem;font-size:0.8125rem}.lc-hint{font-size:0.625rem;color:var(--text-muted);margin-top:0.15rem}.lc-chip-row{display:flex;flex-wrap:wrap;gap:0.25rem;margin-top:0.35rem}.lc-chip{padding:0.2rem 0.5rem;font-size:0.6rem;font-weight:600;border:1.5px solid var(--border);border-radius:1rem;background:var(--bg-primary);color:var(--text-secondary);cursor:pointer;transition:all 0.15s;font-family:var(--font-sans)}.lc-chip:hover{border-color:var(--lc-tool);color:var(--lc-tool);background:var(--lc-light)}.lc-shape-chip{padding:0.2rem 0.5rem;font-size:0.65rem;font-weight:700;border:1.5px solid var(--border);border-radius:1rem;background:var(--bg-primary);color:var(--text-secondary);cursor:pointer;transition:all 0.15s;font-family:var(--font-mono);letter-spacing:0.05em}.lc-shape-chip:hover,.lc-shape-chip.active{border-color:var(--lc-tool);color:var(--lc-tool);background:var(--lc-light)}.lc-diagram-wrap{width:100%;border:1px solid var(--border);border-radius:0.5rem;overflow:hidden;position:relative}.lc-diagram-wrap canvas{width:100%;height:auto;display:block}.lc-results-grid{display:grid;grid-template-columns:1fr 1fr;gap:0.5rem;margin-bottom:0.75rem}.lc-result-card{padding:0.625rem 0.75rem;background:var(--bg-secondary);border:1px solid var(--border);border-radius:0.5rem;border-left:3px solid var(--lc-tool)}.lc-result-label{font-size:0.6875rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:0.03em;margin-bottom:0.15rem}.lc-result-value{font-family:var(--font-mono);font-size:1rem;font-weight:600;color:var(--text-primary)}.lc-badges{display:flex;gap:0.375rem;flex-wrap:wrap;margin-bottom:0.75rem}.lc-badge{padding:0.25rem 0.625rem;font-size:0.6875rem;font-weight:600;border-radius:1rem;background:var(--lc-light);color:var(--lc-tool)}.lc-badge-converging{background:#dbeafe;color:#1e40af}.lc-badge-diverging{background:#fef3c7;color:#92400e}.lc-badge-contact{background:#d1fae5;color:#065f46}.lc-badge-separated{background:#fce7f3;color:#9d174d}.lc-step{display:flex;gap:0.75rem;margin-bottom:0.75rem;padding-bottom:0.75rem;border-bottom:1px solid var(--border)}.lc-step:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.lc-step-number{width:1.5rem;height:1.5rem;border-radius:50%;background:var(--lc-gradient);color:#fff;font-size:0.6875rem;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:0.1rem}.lc-step-content{flex:1;min-width:0}.lc-step-desc{font-size:0.8125rem;color:var(--text-secondary);margin-bottom:0.25rem}.lc-step-math{font-size:1rem;overflow-x:auto}.lc-edu-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:0.75rem}.lc-edu-card{padding:1rem;background:var(--bg-secondary);border:1px solid var(--border);border-radius:0.5rem;font-size:0.8125rem;line-height:1.6}.lc-edu-card h4{font-size:0.875rem;font-weight:600;color:var(--text-primary);margin:0 0 0.375rem}.lc-edu-card p{margin:0;color:var(--text-secondary)}.lc-callout{display:flex;gap:0.75rem;padding:1rem;border-radius:0.5rem;margin-top:1rem}.lc-callout-insight{background:var(--lc-light);border:1px solid rgba(99,102,241,0.2)}.lc-callout-icon{font-size:1.25rem;flex-shrink:0}.lc-callout-text{font-size:0.8125rem;line-height:1.6;color:var(--text-secondary)}.lc-examples{display:flex;flex-wrap:wrap;gap:0.375rem}.lc-example-chip{padding:0.35rem 0.75rem;font-size:0.6875rem;font-weight:600;border:1.5px solid var(--border);border-radius:1rem;background:var(--bg-primary);color:var(--text-secondary);cursor:pointer;transition:all 0.15s;font-family:var(--font-sans)}.lc-example-chip:hover{border-color:var(--lc-tool);color:var(--lc-tool);background:var(--lc-light)}.lc-error{padding:0.75rem 1rem;background:#fef2f2;border:1px solid #fecaca;border-radius:0.5rem;color:#991b1b;font-size:0.8125rem;font-weight:500}[data-theme="dark"] .lc-error{background:rgba(239,68,68,0.1);border-color:rgba(239,68,68,0.3);color:#fca5a5}.lc-anim{opacity:0;transform:translateY(20px);transition:opacity 0.5s,transform 0.5s}.lc-anim.lc-visible{opacity:1;transform:translateY(0)}.lc-anim-d1{transition-delay:0.1s}.lc-anim-d2{transition-delay:0.2s}.lc-anim-d3{transition-delay:0.3s}@media (max-width:640px){.lc-results-grid{grid-template-columns:1fr}.lc-edu-grid{grid-template-columns:1fr}.lc-shape-grid{grid-template-columns:1fr}}