:root{--tool-primary:#059669;--tool-primary-dark:#047857;--tool-gradient:linear-gradient(135deg,#059669 0%,#10b981 100%);--tool-light:#ecfdf5}[data-theme="dark"]{--tool-light:rgba(5,150,105,0.15)}.zt-mode-toggle{display:inline-flex;gap:2px;background:var(--ms-panel-bg-soft,var(--bg-secondary));padding:3px;border-radius:var(--ms-radius-pill,999px);border:1px solid var(--ms-line,var(--border))}.zt-mode-btn{padding:5px 14px;font-weight:600;font-size:12px;border:none;cursor:pointer;background:transparent;color:var(--ms-muted,var(--text-secondary));border-radius:var(--ms-radius-pill,999px);transition:color 0.15s,background 0.15s;font-family:var(--ms-font-sans,var(--font-sans));white-space:nowrap}.zt-mode-btn.active{background:var(--ms-panel-bg,var(--bg-primary));color:var(--ms-accent,var(--tool-primary));box-shadow:var(--ms-shadow-sm,0 1px 3px rgba(0,0,0,0.08))}.zt-mode-btn:hover:not(.active){color:var(--ms-ink,var(--text-primary))}[data-theme="dark"] .zt-mode-btn.active{background:var(--ms-panel-bg);color:var(--ms-accent)}.ic-hero--compact{padding:1.1rem 1.25rem 1rem}.ic-hero--compact .ic-hero-top{margin-bottom:0.75rem}.zt-hero-core{display:flex;flex-direction:column;gap:0.55rem;max-width:36rem}.zt-field-label{display:block;font:600 0.72rem var(--ms-font-sans,var(--font-sans));text-transform:uppercase;letter-spacing:0.05em;color:var(--ms-muted,var(--text-muted));margin-bottom:0.3rem}.zt-main-input,.ic-hero--compact .tool-input{width:100%;padding:0.55rem 0.75rem;font-size:0.9rem}.zt-preview-strip{display:flex;align-items:center;gap:0.55rem;padding:0.45rem 0.65rem;background:var(--ms-accent-softer,rgba(5,150,105,0.04));border-left:3px solid var(--ms-accent,var(--tool-primary));border-radius:0 var(--ms-radius-sm,6px) var(--ms-radius-sm,6px)0;min-height:2rem;overflow:hidden}.zt-preview-label{flex-shrink:0;font:600 0.65rem var(--ms-font-sans,var(--font-sans));text-transform:uppercase;letter-spacing:0.05em;color:var(--ms-muted,var(--text-muted))}.zt-preview{flex:1;min-width:0;overflow-x:auto;font-size:0.95rem}.zt-preview .katex-display{margin:0}.zt-preview-placeholder{font-size:0.8125rem;color:var(--ms-muted,var(--text-muted))}.zt-hero-cta-row{display:flex;align-items:center;gap:0.5rem}.zt-random-btn{flex-shrink:0;width:2.25rem;height:2.25rem;border:1px solid var(--ms-line,var(--border));border-radius:var(--ms-radius-sm,6px);background:var(--ms-panel-bg,var(--bg-primary));cursor:pointer;font-size:1rem;line-height:1}.zt-examples-body .zt-examples{display:flex;flex-wrap:wrap;gap:0.375rem}.zt-preview{background:var(--bg-secondary,#f8fafc);border:1px solid var(--border,#e2e8f0);border-radius:var(--radius-md,0.5rem);padding:0.75rem 1rem;min-height:48px;display:flex;align-items:center;justify-content:center;overflow-x:auto;font-size:1.1rem}.zt-preview .katex-display{margin:0}[data-theme="dark"] .zt-preview{background:var(--bg-tertiary);border-color:var(--border)}.zt-examples{display:flex;flex-wrap:wrap;gap:0.375rem}.zt-example-chip{padding:0.3rem 0.625rem;font-size:0.75rem;font-family:var(--font-mono);background:var(--bg-secondary,#f8fafc);border:1px solid var(--border,#e2e8f0);border-radius:var(--radius-full,9999px);cursor:pointer;transition:all 0.15s;color:var(--text-secondary);white-space:nowrap}.zt-example-chip:hover{background:var(--tool-primary);color:#fff;border-color:var(--tool-primary)}[data-theme="dark"] .zt-example-chip{background:var(--bg-tertiary);border-color:var(--border);color:var(--text-secondary)}[data-theme="dark"] .zt-example-chip:hover{background:var(--tool-primary);color:#fff}.zt-pairs-toggle{display:flex;align-items:center;justify-content:space-between;cursor:pointer;padding:0.5rem 0;font-size:0.8125rem;font-weight:600;color:var(--text-secondary);border:none;background:none;width:100%;font-family:var(--font-sans)}.zt-pairs-content{display:none;padding-bottom:0.5rem}.zt-pairs-content.open{display:block}.zt-pairs-chevron{transition:transform 0.2s;width:14px;height:14px;flex-shrink:0}.zt-pairs-table{width:100%;border-collapse:collapse;font-size:0.8125rem;margin-top:0.5rem}.zt-pairs-table th{background:var(--tool-light);color:var(--tool-primary);font-weight:600;padding:0.5rem 0.625rem;text-align:left;border-bottom:1.5px solid var(--border);font-size:0.75rem;text-transform:uppercase;letter-spacing:0.03em}.zt-pairs-table td{padding:0.4375rem 0.625rem;border-bottom:1px solid var(--border-light,#f1f5f9);color:var(--text-secondary);vertical-align:middle}.zt-pairs-table tr:last-child td{border-bottom:none}[data-theme="dark"] .zt-pairs-table th{background:var(--tool-light)}[data-theme="dark"] .zt-pairs-table td{border-bottom-color:var(--border)}.zt-syntax-toggle{display:flex;align-items:center;justify-content:space-between;cursor:pointer;padding:0.5rem 0;font-size:0.8125rem;font-weight:600;color:var(--text-secondary);border:none;background:none;width:100%;font-family:var(--font-sans)}.zt-syntax-content{display:none;font-size:0.75rem;font-family:var(--font-mono);color:var(--text-secondary);line-height:1.8;padding-bottom:0.5rem}.zt-syntax-content.open{display:block}.zt-syntax-chevron{transition:transform 0.2s;width:14px;height:14px;flex-shrink:0}.zt-output-tabs{display:flex;border:1.5px solid var(--border,#e2e8f0);border-radius:var(--radius-md,0.5rem);overflow:hidden}.zt-output-tab{flex:1;padding:0.5rem;font-weight:600;font-size:0.8125rem;border:none;cursor:pointer;background:var(--bg-secondary);color:var(--text-secondary);transition:all 0.15s;font-family:var(--font-sans);text-align:center}.zt-output-tab.active{background:var(--tool-gradient);color:#fff}.zt-output-tab:hover:not(.active){background:var(--bg-tertiary)}[data-theme="dark"] .zt-output-tab{background:var(--bg-tertiary)}[data-theme="dark"] .zt-output-tab.active{background:var(--tool-gradient);color:#fff}[data-theme="dark"] .zt-output-tab:hover:not(.active){background:rgba(255,255,255,0.08)}.zt-panel{display:none;flex:1;min-height:0}.zt-panel.active{display:flex;flex-direction:column}#zt-panel-result .tool-result-card{flex:1}.zt-result-math{padding:1.5rem;overflow-x:auto;max-width:100%;text-align:center}.zt-result-math .katex-display{margin:0.5rem 0;overflow-x:auto;overflow-y:hidden}.zt-result-label{font-size:0.75rem;font-weight:600;text-transform:uppercase;letter-spacing:0.05em;color:var(--text-muted);margin-bottom:0.25rem}.zt-result-main{font-size:1.3rem;padding:1rem 0}.zt-convergence-badge{display:inline-flex;align-items:center;gap:0.375rem;padding:0.3rem 0.75rem;background:var(--tool-light);color:var(--tool-primary);border-radius:9999px;font-size:0.75rem;font-weight:600;margin-top:0.5rem}.zt-result-detail{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-md);padding:0.75rem 1rem;margin-top:0.75rem;font-size:0.8125rem;color:var(--text-secondary)}[data-theme="dark"] .zt-result-detail{background:var(--bg-tertiary);border-color:var(--border)}.zt-method-badge{display:inline-block;background:var(--tool-light);color:var(--tool-primary);padding:0.2rem 0.625rem;border-radius:9999px;font-size:0.6875rem;font-weight:600}.zt-error{background:#fef3c7;border:1px solid #fbbf24;border-radius:var(--radius-md);padding:1.25rem;color:#92400e}.zt-error h4{margin:0 0 0.5rem;font-size:0.9375rem;font-weight:700}.zt-error ul{margin:0.5rem 0 0;padding-left:1.25rem;font-size:0.8125rem;line-height:1.7}[data-theme="dark"] .zt-error{background:rgba(251,191,36,0.15);border-color:rgba(251,191,36,0.3);color:#fbbf24}.zt-steps-btn{display:inline-flex;align-items:center;gap:0.375rem;padding:0.5rem 1rem;font-size:0.8125rem;font-weight:600;font-family:var(--font-sans);border:1.5px solid var(--tool-primary);border-radius:var(--radius-full);background:transparent;color:var(--tool-primary);cursor:pointer;transition:all 0.15s;margin-top:0.75rem}.zt-steps-btn:hover{background:var(--tool-primary);color:#fff}.zt-steps-container{margin-top:1rem;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}.zt-steps-header{display:flex;align-items:center;gap:0.5rem;padding:0.625rem 1rem;background:var(--tool-light);border-bottom:1px solid var(--border);font-size:0.8125rem;font-weight:600;color:var(--tool-primary)}.zt-step{padding:0.75rem 1rem;border-bottom:1px solid var(--border-light);display:flex;gap:0.75rem;align-items:flex-start}.zt-step:last-child{border-bottom:none}.zt-step-num{flex-shrink:0;width:24px;height:24px;border-radius:50%;background:var(--tool-gradient);color:#fff;font-size:0.6875rem;font-weight:700;display:flex;align-items:center;justify-content:center}.zt-step-body{flex:1;min-width:0}.zt-step-title{font-size:0.75rem;font-weight:600;color:var(--text-secondary);margin-bottom:0.25rem}.zt-step-math{font-size:1rem;overflow-x:auto;overflow-y:hidden}.zt-step-math .katex-display{margin:0;overflow-x:auto;overflow-y:hidden;white-space:nowrap;display:inline-block;min-width:min-content}.zt-steps-sympy-badge{font-size:0.625rem;font-weight:500;padding:0.125rem 0.5rem;border-radius:9999px;background:var(--bg-secondary);color:var(--text-muted);margin-left:auto}[data-theme="dark"] .zt-steps-container{border-color:var(--border)}[data-theme="dark"] .zt-steps-header{background:var(--tool-light);border-bottom-color:var(--border)}[data-theme="dark"] .zt-step{border-bottom-color:var(--border)}#zt-graph-container{width:100%;min-height:440px;border-radius:var(--radius-md)}#zt-panel-graph{min-height:480px}#zt-panel-python{min-height:540px}#zt-panel-result .tool-result-card{flex:1}.zt-action-row{display:flex;gap:0.5rem;margin-top:1rem}.zt-action-row .zt-compute-btn{flex:1;margin-top:0}.zt-random-btn{flex:0 0 auto;padding:0.75rem 1rem;font-weight:600;font-size:0.8125rem;font-family:var(--font-sans);border:1.5px solid var(--tool-primary);border-radius:var(--radius-md,0.5rem);background:var(--bg-primary);color:var(--tool-primary);cursor:pointer;transition:all 0.15s;display:inline-flex;align-items:center;gap:0.375rem}.zt-random-btn:hover{background:var(--tool-primary);color:#fff}.zt-random-btn:active{transform:scale(0.96)}[data-theme="dark"] .zt-random-btn{background:var(--bg-tertiary);border-color:var(--tool-primary);color:#34d399}[data-theme="dark"] .zt-random-btn:hover{background:var(--tool-primary);color:#fff}.zt-sep{border:none;border-top:1px solid var(--border,#e2e8f0);margin:0.75rem 0}@keyframes zt-spin{to{transform:rotate(360deg)}}.zt-spinner{width:14px;height:14px;border:2px solid var(--border);border-top-color:var(--tool-primary);border-radius:50%;animation:zt-spin 0.6s linear infinite}.zt-ai-group{margin-bottom:0.75rem;padding:0.75rem;background:linear-gradient(135deg,rgba(99,102,241,0.06),rgba(139,92,246,0.04));border:1px solid rgba(99,102,241,0.15);border-radius:0.5rem}.zt-ai-label{color:#6366f1!important;font-weight:600!important}.zt-ai-row{display:flex;gap:0.4rem;margin-top:0.4rem}.zt-ai-row .tool-input{flex:1;font-size:0.85rem}.zt-ai-btn{padding:0.45rem 0.9rem;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;border:none;border-radius:0.375rem;font-size:0.8rem;font-weight:600;cursor:pointer;white-space:nowrap;transition:transform 0.12s,box-shadow 0.12s}.zt-ai-btn:hover{transform:translateY(-1px);box-shadow:0 3px 10px rgba(99,102,241,0.3)}.zt-ai-btn:disabled{opacity:0.6;cursor:wait;transform:none;box-shadow:none}.zt-ai-status{margin-top:0.4rem;padding:0.35rem 0.5rem;border-radius:0.25rem;font-size:0.78rem}.zt-ai-status.loading{color:#6366f1;background:rgba(99,102,241,0.08)}.zt-ai-status.success{color:#16a34a;background:rgba(22,163,74,0.08)}.zt-ai-status.error{color:#dc2626;background:rgba(220,38,38,0.08)}.zt-ai-examples{display:flex;flex-wrap:wrap;gap:0.3rem;margin-top:0.5rem}.zt-ai-chip{padding:0.2rem 0.5rem;background:rgba(99,102,241,0.08);border:1px solid rgba(99,102,241,0.15);border-radius:12px;font-size:0.7rem;color:#6366f1;font-weight:500;cursor:pointer;transition:background 0.12s}.zt-ai-chip:hover{background:rgba(99,102,241,0.15)}[data-theme="dark"] .zt-ai-group{background:linear-gradient(135deg,rgba(99,102,241,0.08),rgba(139,92,246,0.05));border-color:rgba(99,102,241,0.2)}[data-theme="dark"] .zt-ai-label{color:#818cf8!important}[data-theme="dark"] .zt-ai-chip{background:rgba(99,102,241,0.12);border-color:rgba(99,102,241,0.2);color:#a5b4fc}[data-theme="dark"] .zt-ai-chip:hover{background:rgba(99,102,241,0.2)}