*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:1rem;line-height:1.5;color:#0f172a;background:#fff}*:focus-visible{outline:2px solid var(--primary);outline-offset:2px}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}:root,:root[data-theme="light"]{--primary:#6366f1;--primary-dark:#4f46e5;--primary-light:#818cf8;--primary-50:#eef2ff;--primary-100:#e0e7ff;--bg-primary:#fff;--bg-secondary:#f8fafc;--bg-tertiary:#f1f5f9;--bg-hover:#f8fafc;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--text-inverse:#fff;--border:#e2e8f0;--border-light:#f1f5f9;--border-dark:#cbd5e1;--success:#10b981;--warning:#f59e0b;--error:#ef4444;--info:#3b82f6;--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:"JetBrains Mono","Fira Code","SF Mono",Consolas,monospace;--text-xs:0.75rem;--text-sm:0.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--leading-tight:1.25;--leading-normal:1.5;--font-normal:400;--font-medium:500;--font-semibold:600;--font-bold:700;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--shadow-sm:0 1px 2px 0 rgba(0,0,0,0.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -2px rgba(0,0,0,0.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -4px rgba(0,0,0,0.1);--radius-sm:0.375rem;--radius-md:0.5rem;--radius-lg:0.75rem;--radius-xl:1rem;--radius-full:9999px;--z-dropdown:1000;--z-sticky:1020;--z-fixed:1030;--z-modal-backdrop:1040;--z-modal:1050;--transition-fast:150ms ease-in-out;--transition-base:200ms ease-in-out;--transition-slow:300ms ease-in-out;--header-height-mobile:64px;--header-height-desktop:72px;--container-max-width:1280px;--tool-primary:#4f46e5;--tool-primary-dark:#4338ca;--tool-gradient:linear-gradient(135deg,#4f46e5 0%,#6366f1 100%);--tool-light:#eef2ff}@media (prefers-color-scheme:dark){:root{--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-tertiary:#334155;--bg-hover:#1e293b;--text-primary:#f1f5f9;--text-secondary:#cbd5e1;--text-muted:#94a3b8;--border:#334155;--border-light:#475569;--border-dark:#64748b}}[data-theme="dark"]{--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-tertiary:#334155;--bg-hover:#1e293b;--text-primary:#f1f5f9;--text-secondary:#cbd5e1;--text-muted:#94a3b8;--border:#334155;--border-light:#475569;--border-dark:#64748b;--tool-light:rgba(79,70,229,0.15)}[data-theme="dark"] body{background-color:var(--bg-primary);color:var(--text-primary)}@media (min-width:768px){:root{--header-height-mobile:72px}}.modern-nav{position:fixed;top:0;left:0;right:0;z-index:var(--z-fixed,1030);background:var(--bg-primary,#fff);border-bottom:1px solid var(--border,#e2e8f0);box-shadow:var(--shadow-sm);height:var(--header-height-desktop,72px)}.nav-container{max-width:1400px;margin:0 auto;padding:0 var(--space-4,1rem);display:flex;align-items:center;justify-content:space-between;height:100%}.nav-logo{display:flex;align-items:center;gap:var(--space-3,0.75rem);text-decoration:none;font-weight:700;font-size:var(--text-lg,1.125rem)}.nav-logo img{width:32px;height:32px;border-radius:var(--radius-md,0.5rem)}.nav-logo span{background:linear-gradient(135deg,#6366f1 0%,#8b5cf6 50%,#ec4899 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:700;letter-spacing:-0.02em}[data-theme="dark"] .nav-logo span{background:linear-gradient(135deg,#818cf8 0%,#a78bfa 50%,#f472b6 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-items{display:flex;align-items:center;gap:var(--space-6,1.5rem);list-style:none;margin:0;padding:0}.nav-link{color:var(--text-secondary,#475569);text-decoration:none;font-weight:500;font-size:var(--text-base,1rem);padding:var(--space-2,0.5rem) var(--space-3,0.75rem);border-radius:var(--radius-md,0.5rem);display:flex;align-items:center;gap:var(--space-2,0.5rem)}.nav-actions{display:flex;align-items:center;gap:var(--space-3,0.75rem)}.btn-nav{padding:var(--space-2,0.5rem) var(--space-4,1rem);border-radius:var(--radius-md,0.5rem);font-size:var(--text-sm,0.875rem);font-weight:500;text-decoration:none;border:none;cursor:pointer;display:inline-flex;align-items:center;gap:var(--space-2,0.5rem);font-family:var(--font-sans)}.btn-nav-primary{background:var(--primary,#6366f1);color:#fff}.btn-nav-secondary{background:var(--bg-secondary,#f8fafc);color:var(--text-secondary,#475569);border:1px solid var(--border,#e2e8f0)}.mobile-menu-toggle,.mobile-search-toggle{display:none;background:none;border:none;padding:var(--space-2,0.5rem);cursor:pointer;color:var(--text-primary)}.mobile-menu-toggle{font-size:var(--text-xl,1.25rem);width:40px;height:40px;align-items:center;justify-content:center;border-radius:var(--radius-md,0.5rem)}.nav-search{position:relative;flex:1;max-width:500px;margin:0 var(--space-6,1.5rem)}.search-input{width:100%;padding:var(--space-2,0.5rem) var(--space-10,2.5rem) var(--space-2,0.5rem) var(--space-4,1rem);border:2px solid var(--border,#e2e8f0);border-radius:var(--radius-full,9999px);font-size:var(--text-sm,0.875rem);background:var(--bg-secondary,#f8fafc);font-family:var(--font-sans)}.search-icon{position:absolute;right:var(--space-4,1rem);top:50%;transform:translateY(-50%);color:var(--text-muted,#94a3b8);pointer-events:none}@media (max-width:991px){.modern-nav{height:var(--header-height-mobile,64px)}.nav-container{padding:0 var(--space-3,0.75rem)}.nav-search,.nav-items{display:none}.nav-actions{gap:var(--space-2,0.5rem)}.btn-nav{padding:var(--space-2,0.5rem) var(--space-3,0.75rem);font-size:var(--text-xs,0.75rem)}.mobile-menu-toggle,.mobile-search-toggle{display:flex}.btn-nav .nav-text{display:none}}.tool-page-header{background:var(--bg-primary,#fff);border-bottom:1px solid var(--border,#e2e8f0);padding:1.25rem 1.5rem;margin-top:72px}.tool-page-header-inner{max-width:1600px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}.tool-page-title{font-size:1.5rem;font-weight:700;color:var(--text-primary,#0f172a);margin:0}.tool-page-badges{display:flex;gap:0.5rem;flex-wrap:wrap}.tool-badge{display:inline-flex;align-items:center;gap:0.25rem;padding:0.25rem 0.625rem;font-size:0.6875rem;font-weight:500;border-radius:9999px;background:var(--tool-light);color:var(--tool-primary)}.tool-breadcrumbs{font-size:0.8125rem;color:var(--text-secondary,#475569);margin-top:0.5rem}.tool-breadcrumbs a{color:var(--text-secondary,#475569);text-decoration:none}.tool-description-section{background:var(--tool-light);border-bottom:1px solid var(--border,#e2e8f0);padding:1.25rem 1.5rem}.tool-description-inner{max-width:1600px;margin:0 auto;display:flex;align-items:center;gap:2rem}.tool-description-content{flex:1}.tool-description-content p{margin:0;font-size:0.9375rem;line-height:1.6;color:var(--text-secondary,#475569)}@media (max-width:767px){.tool-description-section{padding:1rem}.tool-description-content p{font-size:0.875rem}}.tool-page-container{display:grid;grid-template-columns:minmax(320px,400px) minmax(0,1fr) 300px;gap:1.5rem;max-width:1600px;margin:0 auto;padding:1.5rem;min-height:calc(100vh - 180px)}@media (max-width:1024px){.tool-page-container{grid-template-columns:minmax(300px,380px) minmax(0,1fr)}.tool-ads-column{display:none}}@media (max-width:900px){.tool-page-container{grid-template-columns:1fr;gap:1rem;display:flex;flex-direction:column}.tool-input-column{position:relative;top:auto;max-height:none;overflow-y:visible;order:1}.tool-output-column{min-width:0;display:flex!important;min-height:350px;order:2}.tool-ads-column{order:3}}.tool-input-column{position:sticky;top:90px;height:fit-content;max-height:calc(100vh - 110px);overflow-y:auto}.tool-output-column{min-width:0;display:flex;flex-direction:column;gap:1rem}.tool-ads-column{height:fit-content}.tool-card{background:var(--bg-primary,#fff);border:1px solid var(--border,#e2e8f0);border-radius:0.75rem;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,0.05)}.tool-card-header{background:var(--tool-gradient);color:#fff;padding:0.875rem 1rem;font-weight:600;font-size:0.9375rem;display:flex;align-items:center;gap:0.5rem}.tool-card-body{padding:1rem}.tool-form-group{margin-bottom:0.875rem}.tool-form-label{display:block;font-weight:500;margin-bottom:0.375rem;color:var(--text-primary,#0f172a);font-size:0.8125rem}.tool-form-hint{font-size:0.6875rem;color:var(--text-secondary,#475569);margin-top:0.25rem}.tool-action-btn{width:100%;padding:0.75rem;font-weight:600;font-size:0.875rem;border:none;border-radius:0.5rem;cursor:pointer;background:var(--tool-gradient);color:#fff;margin-top:1rem;transition:opacity .15s,transform .15s}.tool-result-card{min-width:0;overflow:hidden;display:flex;flex-direction:column;height:100%}.tool-result-header{display:flex;align-items:center;gap:0.5rem;padding:1rem 1.25rem;background:var(--bg-secondary,#f8fafc);border-bottom:1px solid var(--border,#e2e8f0);border-radius:0.75rem 0.75rem 0 0}.tool-result-header h4{margin:0;font-size:0.95rem;font-weight:600;color:var(--text-primary,#0f172a);flex:1}.tool-result-content{min-width:0;flex:1;padding:1.25rem;min-height:300px;overflow-y:auto}.tool-result-actions{display:none;gap:0.5rem;padding:1rem 1.25rem;border-top:1px solid var(--border,#e2e8f0);background:var(--bg-secondary,#f8fafc);border-radius:0 0 0.75rem 0.75rem;flex-wrap:wrap}.tool-result-actions.visible{display:flex}.tool-result-actions .tool-action-btn{flex:1;min-width:90px;margin-top:0}.tool-empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:3rem 1.5rem;color:var(--text-muted,#94a3b8)}.tool-empty-state h3{font-size:1rem;font-weight:600;margin-bottom:0.5rem;color:var(--text-secondary,#475569)}.tool-empty-state p{font-size:0.875rem;max-width:280px}[data-theme="dark"] .tool-page-header{background:var(--bg-secondary,#1e293b);border-bottom-color:var(--border,#334155)}[data-theme="dark"] .tool-page-title{color:var(--text-primary,#f1f5f9)}[data-theme="dark"] .tool-breadcrumbs,[data-theme="dark"] .tool-breadcrumbs a{color:var(--text-secondary,#94a3b8)}[data-theme="dark"] .tool-badge{background:var(--tool-light);color:var(--tool-primary)}[data-theme="dark"] .tool-description-section{background:var(--bg-secondary,#1e293b);border-bottom-color:var(--border,#334155)}[data-theme="dark"] .tool-description-content p{color:var(--text-secondary,#cbd5e1)}[data-theme="dark"] .tool-card{background:var(--bg-secondary,#1e293b);border-color:var(--border,#334155)}[data-theme="dark"] .tool-form-label{color:var(--text-primary,#f1f5f9)}[data-theme="dark"] .tool-action-btn{box-shadow:0 4px 12px rgba(79,70,229,0.3)}.tool-input{width:100%;padding:0.625rem 0.75rem;border:1.5px solid var(--border,#e2e8f0);border-radius:var(--radius-md,0.5rem);font-size:0.875rem;font-family:var(--font-sans);background:var(--bg-primary,#fff);color:var(--text-primary,#0f172a);transition:border-color var(--transition-fast)}.tool-input:focus{outline:none;border-color:var(--tool-primary);box-shadow:0 0 0 3px rgba(79,70,229,0.1)}.tool-input-mono{font-family:var(--font-mono);font-size:0.9375rem;letter-spacing:-0.02em}.tool-select{width:100%;padding:0.5rem 0.75rem;border:1.5px solid var(--border,#e2e8f0);border-radius:var(--radius-md,0.5rem);font-size:0.8125rem;font-family:var(--font-sans);background:var(--bg-primary,#fff);color:var(--text-primary,#0f172a);cursor:pointer}[data-theme="dark"] .tool-input,[data-theme="dark"] .tool-select{background:var(--bg-tertiary);border-color:var(--border);color:var(--text-primary)}[data-theme="dark"] .tool-input:focus{box-shadow:0 0 0 3px rgba(79,70,229,0.25)}.ic-mode-toggle{display:flex;border:1.5px solid var(--border,#e2e8f0);border-radius:var(--radius-md,0.5rem);overflow:hidden;margin-bottom:0.875rem}.ic-mode-btn{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}.ic-mode-btn.active{background:var(--tool-gradient);color:#fff}.ic-mode-btn:hover:not(.active){background:var(--bg-tertiary)}[data-theme="dark"] .ic-mode-btn{background:var(--bg-tertiary)}[data-theme="dark"] .ic-mode-btn.active{background:var(--tool-gradient);color:#fff}[data-theme="dark"] .ic-mode-btn:hover:not(.active){background:rgba(255,255,255,0.08)}.ic-expr-label-row{display:flex;align-items:center;justify-content:space-between;gap:0.5rem;margin-bottom:0.375rem;flex-wrap:wrap}.ic-expr-label-row .ic-expr-label{margin:0;flex:0 0 auto}.ic-expr-label-actions{display:inline-flex;align-items:center;gap:0.375rem}.ic-input-mode-toggle{display:inline-flex;gap:2px;padding:2px;background:var(--bg-secondary,#f8fafc);border:1px solid var(--border,#e2e8f0);border-radius:var(--radius-full,9999px)}.ic-input-mode-btn{display:inline-flex;align-items:center;justify-content:center;gap:4px;padding:0.25rem 0.625rem;font-size:0.6875rem;font-weight:600;color:var(--text-secondary,#475569);background:transparent;border:none;border-radius:var(--radius-full,9999px);cursor:pointer;transition:all 0.15s;font-family:var(--font-sans);line-height:1}.ic-input-mode-btn:hover:not(.active):not(:disabled){color:var(--text-primary)}.ic-input-mode-btn.active{background:var(--bg-primary,#fff);color:var(--tool-primary,#4f46e5);box-shadow:0 1px 2px rgba(15,23,42,0.08),0 0 0 1px rgba(79,70,229,0.2)}.ic-input-mode-btn>span:first-child{font-size:0.95em;opacity:0.9}[data-theme="dark"] .ic-input-mode-toggle{background:var(--bg-tertiary);border-color:var(--border)}[data-theme="dark"] .ic-input-mode-btn{color:var(--text-secondary)}[data-theme="dark"] .ic-input-mode-btn.active{background:var(--bg-secondary);color:var(--primary-light,#818cf8);box-shadow:0 1px 2px rgba(0,0,0,0.3),0 0 0 1px rgba(129,140,248,0.3)}[data-theme="dark"] .ic-input-mode-btn:hover:not(.active):not(:disabled){color:var(--text-primary)}@media (max-width:380px){.ic-mode-label{display:none}.ic-input-mode-btn{padding:0.25rem 0.5rem}}.ic-mathfield{display:block;width:100%;min-height:48px;padding:0.625rem 0.75rem;background:var(--bg-primary,#fff);color:var(--text-primary,#0f172a);border:1.5px solid var(--border,#e2e8f0);border-radius:var(--radius-md,0.5rem);font-size:1.0625rem;line-height:1.4;transition:border-color 0.15s,box-shadow 0.15s;--selection-background-color:rgba(79,70,229,0.25);--selection-color:var(--text-primary,#0f172a);--caret-color:var(--tool-primary,#4f46e5);--contains-highlight-background-color:rgba(79,70,229,0.08)}.ic-mathfield:focus,.ic-mathfield:focus-within{outline:none;border-color:var(--tool-primary,#4f46e5);box-shadow:0 0 0 3px rgba(79,70,229,0.15)}.ic-mathfield:not(:defined){min-height:48px;background:var(--bg-secondary,#f8fafc);color:transparent}[data-theme="dark"] .ic-mathfield{background:var(--bg-tertiary);border-color:var(--border);color:var(--text-primary);--selection-background-color:rgba(129,140,248,0.28);--caret-color:var(--primary-light,#818cf8);--contains-highlight-background-color:rgba(129,140,248,0.12)}[data-theme="dark"] .ic-mathfield:focus,[data-theme="dark"] .ic-mathfield:focus-within{border-color:var(--primary-light,#818cf8);box-shadow:0 0 0 3px rgba(129,140,248,0.2)}.ic-expr-wrap[data-input-mode="visual"] #ic-expr,.ic-expr-wrap[data-input-mode="visual"] #ic-autocomplete,.ic-expr-wrap:not([data-input-mode]) #ic-expr,.ic-expr-wrap:not([data-input-mode]) #ic-autocomplete{display:none}.ic-expr-wrap[data-input-mode="text"] #ic-mathfield{display:none}.ic-expr-wrap .ic-expr-hint{display:block;margin-top:0.375rem;font-size:0.6875rem;color:var(--text-secondary,#475569);line-height:1.4}.ic-expr-wrap .ic-expr-hint>span{display:none}.ic-expr-wrap[data-input-mode="visual"] .ic-expr-hint .ic-hint-visual,.ic-expr-wrap:not([data-input-mode]) .ic-expr-hint .ic-hint-visual,.ic-expr-wrap[data-input-mode="text"] .ic-expr-hint .ic-hint-text{display:inline}.ic-expr-wrap .ic-expr-hint code{font-family:var(--font-mono);background:var(--bg-secondary,#f8fafc);border:1px solid var(--border,#e2e8f0);border-radius:3px;padding:1px 4px;font-size:0.95em}[data-theme="dark"] .ic-expr-wrap .ic-expr-hint code{background:var(--bg-tertiary);border-color:var(--border)}.tool-card-body[data-input-mode="visual"] .tool-form-group:has(>#ic-preview),.tool-card-body:not([data-input-mode]) .tool-form-group:has(>#ic-preview){display:none}.ic-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}.ic-preview .katex-display{margin:0}[data-theme="dark"] .ic-preview{background:var(--bg-tertiary);border-color:var(--border)}.ic-bounds{display:none;gap:0.75rem;padding-top:0.5rem}.ic-bounds.visible{display:grid;grid-template-columns:1fr 1fr}.ic-examples{display:flex;flex-wrap:wrap;gap:0.375rem}.ic-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}.ic-example-chip:hover{background:var(--tool-primary);color:#fff;border-color:var(--tool-primary)}[data-theme="dark"] .ic-example-chip{background:var(--bg-tertiary);border-color:var(--border);color:var(--text-secondary)}[data-theme="dark"] .ic-example-chip:hover{background:var(--tool-primary);color:#fff}.ic-expr-wrap{position:relative}.ic-image-btn{display:inline-flex;align-items:center;gap:3px;padding:2px 8px;background:rgba(99,102,241,0.08);color:var(--primary,#6366f1);border:1px solid rgba(99,102,241,0.2);border-radius:4px;font-size:0.6875rem;font-weight:500;cursor:pointer;transition:all 0.12s;vertical-align:middle;line-height:1.2}.ic-image-btn:hover{background:rgba(99,102,241,0.15);border-color:rgba(99,102,241,0.4)}.ic-autocomplete{display:none;position:absolute;left:0;right:0;top:100%;z-index:var(--z-dropdown,1000);background:var(--bg-primary,#fff);border:1.5px solid var(--border,#e2e8f0);border-top:none;border-radius:0 0 var(--radius-md,0.5rem) var(--radius-md,0.5rem);box-shadow:var(--shadow-lg);max-height:260px;overflow-y:auto}.ic-autocomplete.active{display:block}.ic-autocomplete-item{display:flex;align-items:center;gap:0.5rem;padding:0.5rem 0.75rem;cursor:pointer;font-family:var(--font-mono);font-size:0.8125rem;color:var(--text-primary,#0f172a);transition:background 0.1s}.ic-autocomplete-item:hover,.ic-autocomplete-item.selected{background:var(--tool-light,#eef2ff)}.ic-autocomplete-cat{margin-left:auto;flex-shrink:0;font-family:var(--font-sans);font-size:0.625rem;font-weight:600;padding:0.125rem 0.5rem;border-radius:9999px;background:var(--bg-secondary,#f8fafc);color:var(--text-muted,#94a3b8);text-transform:uppercase;letter-spacing:0.04em}[data-theme="dark"] .ic-autocomplete{background:var(--bg-secondary,#1e293b);border-color:var(--border,#334155)}[data-theme="dark"] .ic-autocomplete-item:hover,[data-theme="dark"] .ic-autocomplete-item.selected{background:var(--tool-light)}[data-theme="dark"] .ic-autocomplete-cat{background:var(--bg-tertiary);color:var(--text-muted)}.ic-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)}.ic-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}.ic-syntax-content.open{display:block}.ic-syntax-chevron{transition:transform 0.2s;width:14px;height:14px;flex-shrink:0}.ic-syntax-content.open~.ic-syntax-toggle .ic-syntax-chevron,.open>.ic-syntax-toggle .ic-syntax-chevron{transform:rotate(180deg)}.ic-output-tabs{display:flex;border:1.5px solid var(--border,#e2e8f0);border-radius:var(--radius-md,0.5rem);overflow:hidden}.ic-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}.ic-output-tab.active{background:var(--tool-gradient);color:#fff}.ic-output-tab:hover:not(.active){background:var(--bg-tertiary)}[data-theme="dark"] .ic-output-tab{background:var(--bg-tertiary)}[data-theme="dark"] .ic-output-tab.active{background:var(--tool-gradient);color:#fff}[data-theme="dark"] .ic-output-tab:hover:not(.active){background:rgba(255,255,255,0.08)}.ic-panel{display:none;flex:1;min-height:0}.ic-panel.active{display:flex;flex-direction:column}#ic-panel-result .tool-result-card{flex:1}#ic-panel-graph{min-height:480px}#ic-panel-python{min-height:540px}.ic-result-math{padding:1.5rem;overflow-x:auto;max-width:100%;text-align:center}.ic-result-math .katex-display{margin:0.5rem 0;overflow-x:auto;overflow-y:hidden}.ic-result-label{font-size:0.75rem;font-weight:600;text-transform:uppercase;letter-spacing:0.05em;color:var(--text-muted);margin-bottom:0.25rem}.ic-result-main{font-size:1.3rem;padding:1rem 0}.ic-result-numeric{background:var(--tool-gradient);color:#fff;padding:1rem;border-radius:var(--radius-md);text-align:center;font-size:1.25rem;font-weight:700;margin:0.75rem 0}.ic-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"] .ic-result-detail{background:var(--bg-tertiary);border-color:var(--border)}.ic-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}.ic-error{background:#fef3c7;border:1px solid #fbbf24;border-radius:var(--radius-md);padding:1.25rem;color:#92400e}.ic-error h4{margin:0 0 0.5rem;font-size:0.9375rem;font-weight:700}.ic-error ul{margin:0.5rem 0 0;padding-left:1.25rem;font-size:0.8125rem;line-height:1.7}[data-theme="dark"] .ic-error{background:rgba(251,191,36,0.15);border-color:rgba(251,191,36,0.3);color:#fbbf24}#ic-graph-container{width:100%;min-height:440px;border-radius:var(--radius-md)}.js-plotly-plot .plotly .modebar{top:4px!important;right:4px!important}.ic-sep{border:none;border-top:1px solid var(--border,#e2e8f0);margin:0.75rem 0}.ic-edu-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin-top:1rem}.ic-edu-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-md);padding:1.25rem}.ic-edu-card h4{font-size:0.875rem;font-weight:700;color:var(--text-primary);margin-bottom:0.375rem}.ic-edu-card p{font-size:0.8125rem;color:var(--text-secondary);line-height:1.6;margin:0}[data-theme="dark"] .ic-edu-card{background:var(--bg-tertiary);border-color:var(--border)}.ic-rules-table{width:100%;border-collapse:collapse;font-size:0.8125rem;margin-top:0.75rem}.ic-rules-table th,.ic-rules-table td{padding:0.5rem 0.75rem;text-align:left;border-bottom:1px solid var(--border)}.ic-rules-table th{font-weight:600;color:var(--text-primary);background:var(--bg-secondary)}.ic-rules-table td{color:var(--text-secondary);font-family:var(--font-mono);font-size:0.75rem}[data-theme="dark"] .ic-rules-table th{background:var(--bg-tertiary)}.ic-diagram{max-width:100%;height:auto;display:block;margin:1rem auto}.ic-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}.ic-steps-btn:hover{background:var(--tool-primary);color:#fff}.ic-steps-btn.loading{opacity:0.7;pointer-events:none}.ic-steps-container{margin-top:1rem;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}.ic-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)}.ic-step{padding:0.75rem 1rem;border-bottom:1px solid var(--border-light);display:flex;gap:0.75rem;align-items:flex-start}.ic-step:last-child{border-bottom:none}.ic-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}.ic-step-body{flex:1;min-width:0}.ic-step-title{font-size:0.75rem;font-weight:600;color:var(--text-secondary);margin-bottom:0.25rem}.ic-step-math{font-size:1rem;overflow-x:auto;overflow-y:hidden}.ic-step-math .katex-display{margin:0;overflow-x:auto;overflow-y:hidden;white-space:nowrap;display:inline-block;min-width:min-content}[data-theme="dark"] .ic-steps-container{border-color:var(--border)}[data-theme="dark"] .ic-steps-header{background:var(--tool-light);border-bottom-color:var(--border)}[data-theme="dark"] .ic-step{border-bottom-color:var(--border)}.ic-steps-ai-badge,.ic-steps-cas-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}.ic-steps-tabs{display:flex;flex-wrap:wrap;gap:0.25rem;padding:0.5rem 1rem;background:var(--bg-secondary);border-bottom:1px solid var(--border-light)}.ic-step-tab{font-size:0.75rem;font-weight:500;padding:0.25rem 0.625rem;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-secondary);cursor:pointer}.ic-step-tab:hover{background:var(--bg-hover);color:var(--text-primary)}.ic-step-tab.active{background:var(--tool-gradient);color:#fff;border-color:transparent}.ic-steps-panel{display:none}.ic-steps-panel.active{display:block}.ic-steps-scroll{max-height:600px;overflow-y:auto;scroll-behavior:smooth}.ic-steps-scroll.collapsed .ic-step.ic-step-hidden{display:none}.ic-steps-expand-btn{display:flex;align-items:center;justify-content:center;gap:0.375rem;width:100%;padding:0.5rem 1rem;border:none;border-bottom:1px solid var(--border-light);background:var(--bg-secondary);color:var(--tool-primary);font-size:0.8125rem;font-weight:600;cursor:pointer;transition:background 0.15s}.ic-steps-expand-btn:hover{background:var(--tool-light)}.ic-steps-expand-btn svg{width:14px;height:14px;transition:transform 0.2s}.ic-steps-scroll:not(.collapsed) .ic-steps-expand-btn svg{transform:rotate(180deg)}[data-theme="dark"] .ic-steps-expand-btn{background:var(--bg-secondary)}[data-theme="dark"] .ic-steps-expand-btn:hover{background:var(--tool-light)}@keyframes ic-spin{to{transform:rotate(360deg)}}.ic-spinner{width:14px;height:14px;border:2px solid var(--border);border-top-color:var(--tool-primary);border-radius:50%;animation:ic-spin 0.6s linear infinite}.faq-item{border-bottom:1px solid var(--border,#e2e8f0)}.faq-item:last-child{border-bottom:none}.faq-question{display:flex;align-items:center;justify-content:space-between;width:100%;padding:0.875rem 0;background:none;border:none;font-size:0.875rem;font-weight:600;color:var(--text-primary,#0f172a);cursor:pointer;text-align:left;font-family:var(--font-sans);gap:0.75rem}.faq-answer{display:none;padding:0 0 0.875rem;font-size:0.8125rem;line-height:1.7;color:var(--text-secondary)}.faq-item.open .faq-answer{display:block}.faq-chevron{transition:transform 0.2s;flex-shrink:0}.faq-item.open .faq-chevron{transform:rotate(180deg)}