@import"https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap";:root{--bg-deep: #060913;--bg-panel: #0b0f19;--bg-card: rgba(15, 23, 42, .45);--bg-card-hover: rgba(30, 41, 59, .6);--bg-border: rgba(255, 255, 255, .06);--bg-border-active: rgba(255, 255, 255, .12);--primary: #2563eb;--primary-start: #3b82f6;--primary-end: #4f46e5;--primary-glow: rgba(37, 99, 235, .15);--primary-muted: rgba(37, 99, 235, .08);--secondary: #10b981;--secondary-light: #34d399;--secondary-muted: rgba(16, 185, 129, .08);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--token-number: #0ea5e9;--token-number-bg: rgba(14, 165, 233, .06);--token-number-border: rgba(14, 165, 233, .15);--token-operator: #f43f5e;--token-operator-bg: rgba(244, 63, 94, .06);--token-operator-border: rgba(244, 63, 94, .15);--token-paren: #8b5cf6;--token-paren-bg: rgba(139, 92, 246, .06);--token-paren-border: rgba(139, 92, 246, .15);--error: #ef4444;--error-bg: rgba(239, 68, 68, .05);--error-glow: rgba(239, 68, 68, .1);--success: #10b981;--success-bg: rgba(16, 185, 129, .05);--font-en: "Inter", system-ui, -apple-system, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", "Courier New", monospace;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-pill: 9999px;--transition: .2s cubic-bezier(.4, 0, .2, 1);--transition-fast: .1s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-deep)}::-webkit-scrollbar-thumb{background:#ffffff14;border-radius:var(--radius-pill)}::-webkit-scrollbar-thumb:hover{background:#ffffff26}body{font-family:var(--font-en);background:var(--bg-deep);color:var(--text-primary);min-height:100vh;line-height:1.5;overflow-x:hidden;position:relative}.bg-gradient-mesh{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;overflow:hidden;pointer-events:none;background:radial-gradient(ellipse 60% 40% at 50% -10%,rgba(37,99,235,.12),transparent),radial-gradient(ellipse 40% 30% at 20% 80%,rgba(99,102,241,.03),transparent)}.app-container{max-width:1100px;margin:0 auto;padding:0 var(--space-lg);position:relative;z-index:1}.glass-card{background:var(--bg-card);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--bg-border);border-radius:var(--radius-lg);padding:var(--space-lg);box-shadow:0 8px 32px #00000059;transition:border-color var(--transition),box-shadow var(--transition)}.glass-card:hover{border-color:var(--bg-border-active);box-shadow:0 8px 32px #0000006b,0 0 24px #2563eb08}.header{border-bottom:1px solid var(--bg-border);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);position:sticky;top:0;z-index:50;background:#060913d9}.header-content{display:flex;align-items:center;justify-content:space-between;height:52px}.brand-link{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text-primary)}.brand-logo-icon{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:var(--radius-sm);background:var(--primary-muted);color:var(--primary-start);border:1px solid rgba(37,99,235,.15)}.brand-title{font-weight:600;font-size:.95rem;letter-spacing:-.01em;color:var(--text-primary);transition:color var(--transition)}.brand-link:hover .brand-title{color:var(--primary-start)}.header-nav{display:flex;align-items:center}.github-link{display:flex;align-items:center;gap:6px;text-decoration:none;font-size:.8rem;font-weight:500;color:var(--text-secondary);padding:5px 10px;border-radius:var(--radius-sm);border:1px solid transparent;transition:all var(--transition)}.github-link:hover{color:var(--text-primary);background:#ffffff0a;border-color:var(--bg-border)}.page-header{padding:var(--space-xl) 0 var(--space-lg);display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-xs)}.page-badge-pill{font-size:.7rem;font-weight:600;text-transform:uppercase;color:var(--primary-start);background:var(--primary-muted);border:1px solid rgba(37,99,235,.15);padding:4px 10px;border-radius:var(--radius-pill);letter-spacing:.05em;display:flex;align-items:center}.online-indicator{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--success);margin-right:6px;box-shadow:0 0 6px var(--success)}.page-title-text{font-size:clamp(2rem,4vw,2.5rem);font-weight:800;letter-spacing:-.03em;margin-top:var(--space-xs);background:linear-gradient(135deg,#fff 30%,#a5b4fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.page-subtitle-text{font-size:.92rem;color:var(--text-secondary);max-width:600px;line-height:1.6}.pipeline-flow{display:flex;flex-direction:column;gap:0;margin-bottom:var(--space-xl)}.pipeline-connector{display:flex;flex-direction:column;align-items:center;height:32px}.pipeline-connector-line{width:1.5px;flex:1;background:repeating-linear-gradient(to bottom,var(--primary-glow) 0px,var(--primary-glow) 3px,transparent 3px,transparent 7px)}.pipeline-connector-arrow{width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-top:6px solid rgba(37,99,235,.3);flex-shrink:0}.pipeline-section{border-radius:var(--radius-lg);overflow:hidden}.pipeline-header{display:flex;align-items:center;justify-content:space-between;width:100%;background:#ffffff04;border:1px solid var(--bg-border);border-radius:var(--radius-md);padding:10px var(--space-lg);cursor:pointer;transition:all var(--transition);text-align:left;color:var(--text-primary);font-family:inherit;font-size:inherit}.pipeline-header:hover{background:#ffffff09;border-color:#ffffff1f}.pipeline-header:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.pipeline-header-left{display:flex;align-items:center;gap:var(--space-md)}.pipeline-badge{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary-start),var(--primary-end));color:#fff;font-weight:800;font-size:.82rem;flex-shrink:0;box-shadow:0 2px 10px #2563eb33}.pipeline-title{font-size:.95rem;font-weight:600;display:flex;align-items:baseline;gap:var(--space-sm)}.pipeline-collapse-icon{display:flex;align-items:center;color:var(--text-muted);transition:color var(--transition);flex-shrink:0}.pipeline-header:hover .pipeline-collapse-icon{color:var(--text-primary)}.pipeline-content{max-height:2000px;opacity:1;overflow:visible;transition:max-height .45s cubic-bezier(.4,0,.2,1),opacity .35s ease,margin .35s ease;margin-top:var(--space-sm)}.pipeline-content.collapsed{max-height:0;opacity:0;overflow:hidden;margin-top:0;pointer-events:none}.fade-in-section{opacity:0;transform:translateY(20px);transition:opacity .5s cubic-bezier(.4,0,.2,1),transform .5s cubic-bezier(.4,0,.2,1)}.fade-in-section.visible{opacity:1;transform:translateY(0)}.parser-section{display:grid;grid-template-columns:1fr;gap:var(--space-lg)}.input-label{font-size:.92rem;font-weight:600;display:block}.input-sub-label{font-size:.78rem;color:var(--text-muted);font-weight:400}.input-wrapper{position:relative;display:flex;align-items:center}.input-prefix-icon{position:absolute;left:14px;display:flex;align-items:center;color:var(--text-muted);pointer-events:none;transition:color var(--transition)}.input-field:focus+.input-prefix-icon,.input-wrapper:focus-within .input-prefix-icon{color:var(--primary-start)}.input-field{width:100%;font-family:var(--font-en);font-size:1.1rem;font-weight:500;background:#0f172a73;border:1px solid var(--bg-border);border-radius:var(--radius-md);color:var(--text-primary);padding:12px var(--space-lg) 12px 2.6rem;padding-right:3rem;outline:none;transition:border-color var(--transition),box-shadow var(--transition),background var(--transition)}.input-field:hover{border-color:#ffffff26}.input-field:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-muted)}.input-field.has-error{border-color:var(--error);box-shadow:0 0 0 3px #ef44441f;animation:shake .4s ease}.clear-btn{position:absolute;right:10px;background:none;border:none;color:var(--text-muted);cursor:pointer;padding:4px;border-radius:var(--radius-sm);display:flex;align-items:center;transition:color var(--transition),background var(--transition)}.clear-btn:hover{color:var(--text-primary);background:#ffffff0f}@keyframes shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-3px)}40%,80%{transform:translate(3px)}}.preset-section{margin-top:var(--space-sm)}.preset-title{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:var(--space-xs)}.chips-container{display:flex;flex-wrap:wrap;gap:6px}.chip{font-family:var(--font-en);font-size:.8rem;font-weight:500;background:var(--bg-card);border:1px solid var(--bg-border);color:var(--text-muted);border-radius:var(--radius-pill);padding:4px 10px;cursor:pointer;transition:all var(--transition)}.chip:hover{background:var(--primary-muted);border-color:#2563eb4d;color:var(--text-primary)}.chip.active{background:var(--primary-muted);border-color:var(--primary);color:#fff}.result-card{background:#10b98108;border:1px solid rgba(16,185,129,.15);border-radius:var(--radius-md);padding:14px var(--space-lg);display:flex;align-items:center;justify-content:space-between;box-shadow:0 4px 20px #10b9810d}.result-info{display:flex;flex-direction:column;gap:2px}.result-label{font-size:.72rem;font-weight:700;color:var(--secondary-light);text-transform:uppercase;letter-spacing:.05em}.result-val{font-family:var(--font-mono);font-size:clamp(2rem,5vw,2.6rem);font-weight:700;color:var(--secondary-light);line-height:1.1}.action-icon-btn{background:#ffffff08;border:1px solid var(--bg-border);color:var(--text-secondary);border-radius:var(--radius-sm);padding:8px;cursor:pointer;display:flex;align-items:center;transition:all var(--transition)}.action-icon-btn:hover{background:#ffffff0f;color:var(--text-primary);border-color:#ffffff26}.error-card{background:#ef444408;border:1px solid rgba(239,68,68,.15);border-radius:var(--radius-md);padding:14px var(--space-lg);display:flex;align-items:center;gap:var(--space-sm);color:#fca5a5;box-shadow:0 4px 20px #ef444408}.error-icon{flex-shrink:0;color:var(--error)}.error-text{font-size:.85rem;font-family:var(--font-en);font-weight:500}.tokenizer-visualizer{display:flex;flex-direction:column;gap:var(--space-md)}.terminal-window{border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--bg-border);background:#040711;box-shadow:0 12px 30px #00000080;margin-bottom:var(--space-xs)}.terminal-header{display:flex;align-items:center;padding:10px 14px;background:#ffffff03;border-bottom:1px solid 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var(--transition)}.control-btn-sm:hover:not(:disabled){background:#ffffff12;border-color:#ffffff2e}.control-btn-sm:disabled{opacity:.3;cursor:not-allowed}.step-counter{font-size:.72rem;font-weight:600;color:var(--text-muted);margin-left:4px;font-variant-numeric:tabular-nums}.scanner-log{font-size:.82rem;color:var(--text-secondary);flex:1;min-width:0;font-family:var(--font-en);padding:6px 10px;background:#ffffff05;border-radius:var(--radius-sm);border-left:2px solid var(--primary)}.scanner-log.error{color:var(--error);border-left-color:var(--error);background:var(--error-bg)}.scanner-log.done{color:var(--success);border-left-color:var(--success);background:var(--success-bg)}.token-output{display:flex;flex-wrap:wrap;gap:6px;min-height:44px;align-content:flex-start}.token-empty{color:var(--text-muted);font-size:.82rem;display:flex;align-items:center}.token-pill{display:flex;flex-direction:column;align-items:center;padding:4px 10px 3px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:default;transition:transform var(--transition-fast)}.token-pill:hover{transform:translateY(-1px)}.token-pill-value{font-family:var(--font-en);font-size:.9rem;font-weight:600;line-height:1.2}.token-pill-type{font-size:.6rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;line-height:1;margin-top:1px}.token-badge-number{background:var(--token-number-bg);color:var(--token-number);border-color:#00d4ff26}.token-badge-operator{background:var(--token-operator-bg);color:var(--token-operator);border-color:#ff6b3526}.token-badge-paren{background:var(--token-paren-bg);color:var(--token-paren);border-color:#a855f726}.token-fly-in{animation:tokenFlyIn .25s cubic-bezier(.175,.885,.32,1.275) both}@keyframes tokenFlyIn{0%{opacity:0;transform:translateY(8px) scale(.9)}to{opacity:1;transform:translateY(0) scale(1)}}.control-btn{background:#ffffff08;border:1px solid var(--bg-border);color:var(--text-primary);font-size:.82rem;font-weight:600;padding:6px 12px;border-radius:var(--radius-sm);cursor:pointer;display:flex;align-items:center;gap:5px;transition:all var(--transition)}.control-btn:hover:not(:disabled){background:#ffffff12;border-color:#ffffff2e}.control-btn:disabled{opacity:.3;cursor:not-allowed}.tokenizer-controls{display:flex;align-items:center;justify-content:space-between;gap:var(--space-md)}.ast-guide-box{background:#ffffff04;border:1px solid var(--bg-border);border-radius:var(--radius-md);padding:var(--space-md) var(--space-lg);font-family:var(--font-en)}.ast-guide-header{display:flex;align-items:center;gap:8px;font-weight:700;font-size:.78rem;color:var(--text-primary);text-transform:uppercase;letter-spacing:.04em;margin-bottom:var(--space-xs)}.ast-guide-dot{width:6px;height:6px;border-radius:50%;background:var(--primary-start);box-shadow:0 0 6px var(--primary-start)}.ast-guide-content>p{font-size:.84rem;color:var(--text-secondary);line-height:1.5;margin:0 0 var(--space-md) 0}.ast-guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md)}.ast-guide-item{background:#ffffff03;border:1px solid rgba(255,255,255,.03);border-radius:var(--radius-sm);padding:var(--space-md);display:flex;flex-direction:column;gap:var(--space-xs)}.ast-guide-item p{font-size:.8rem;color:var(--text-secondary);line-height:1.4;margin:0}.ast-guide-badge{align-self:flex-start;font-size:.62rem;font-weight:700;text-transform:uppercase;letter-spacing:.02em;padding:2px 6px;border-radius:4px}.ast-badge-high{background:#2563eb14;color:var(--primary-start);border:1px solid rgba(37,99,235,.15)}.ast-badge-low{background:#10b98114;color:var(--secondary-light);border:1px solid rgba(16,185,129,.15)}.ast-guide-item code{font-family:var(--font-mono);font-size:.75rem;background:#ffffff0a;padding:1px 4px;border-radius:3px;color:var(--text-primary)}@media (max-width: 640px){.ast-guide-grid{grid-template-columns:1fr;gap:var(--space-sm)}}.ast-visualizer-container{display:flex;flex-direction:column;gap:var(--space-md);align-items:center}.ast-canvas{width:100%;height:380px;background-color:#040711;background-image:radial-gradient(rgba(255,255,255,.05) 1.2px,transparent 0);background-size:20px 20px;border-radius:var(--radius-md);border:1px solid var(--bg-border);position:relative;overflow:auto}.ast-svg-overlay{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:1}.ast-svg-line{stroke:#ffffff0f;stroke-width:1.5px;fill:none;transition:stroke var(--transition),stroke-width var(--transition)}.ast-svg-line.active{stroke:var(--primary-start);stroke-width:2.5px;stroke-dasharray:5;animation:lineDashFlow .8s linear infinite}@keyframes lineDashFlow{to{stroke-dashoffset:-10}}.ast-nodes-layer{position:absolute;top:0;left:0;width:100%;height:100%;z-index:2}.ast-node-circle{position:absolute;transform:translate(-50%,-50%);width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;border:1.5px solid transparent;box-shadow:0 4px 12px #0006;cursor:default;transition:all var(--transition)}.ast-node-circle:hover{transform:translate(-50%,-50%) scale(1.08);z-index:10;border-color:#fff3!important}.ast-node-circle.active{border-color:#fff!important;box-shadow:0 0 16px currentColor,0 4px 16px #00000080;transform:translate(-50%,-50%) scale(1.12);z-index:10}.ast-node-circle-number{background:var(--token-number-bg);color:var(--token-number);border-color:var(--token-number-border)}.ast-node-circle-binary{background:var(--primary-muted);color:#93c5fd;border-color:#2563eb4d;font-family:var(--font-en)}.ast-node-circle-grouping{background:var(--token-paren-bg);color:#c084fc;border-color:var(--token-paren-border)}.ast-node-tooltip{position:absolute;bottom:48px;left:50%;transform:translate(-50%);background:#0b0f19;color:var(--text-primary);font-size:.68rem;padding:4px 8px;border-radius:4px;border:1px solid var(--bg-border);white-space:nowrap;pointer-events:none;opacity:0;transition:opacity .2s;box-shadow:0 4px 10px #00000080;font-family:var(--font-mono)}.ast-node-circle:hover .ast-node-tooltip{opacity:1}.evaluator-visualizer{display:flex;flex-direction:column;gap:var(--space-md)}.stepper-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-sm)}.stepper-progress{font-size:.82rem;font-weight:600;color:var(--text-secondary)}.stepper-progress-bar{flex-grow:1;height:4px;background:#ffffff0a;border-radius:var(--radius-pill);overflow:hidden;margin:0 var(--space-md)}.stepper-progress-fill{height:100%;background:linear-gradient(90deg,var(--primary-start),var(--primary-end));transition:width .3s ease}.step-card-active{background:#ffffff05;border:1px solid var(--primary-muted);border-radius:var(--radius-md);padding:var(--space-md);display:flex;flex-direction:column;gap:var(--space-sm);animation:stepAppear .3s ease-out;box-shadow:0 4px 20px #0000004d}.step-card-active.complete{border-color:#10b98133;background:#10b98105}@keyframes stepAppear{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:.5}50%{opacity:1}}.step-row-top{display:flex;justify-content:space-between;align-items:center}.step-num-badge{background:var(--primary-muted);color:var(--primary-start);font-size:.68rem;font-weight:700;padding:3px 8px;border-radius:var(--radius-pill);text-transform:uppercase;border:1px solid rgba(37,99,235,.15)}.step-num-badge.complete{background:var(--secondary-muted);color:var(--secondary-light);border-color:#10b98126}.step-operation-math{font-size:1.6rem;font-weight:700;font-family:var(--font-mono);text-align:center;padding:var(--space-sm) 0;letter-spacing:-.01em}.step-explanation{font-size:.85rem;color:var(--text-secondary);line-height:1.5}.steps-collapsed-list{display:flex;flex-direction:column;gap:4px}.step-small-row{display:flex;align-items:center;font-size:.82rem;padding:8px 12px;border-radius:var(--radius-sm);background:#ffffff03;border:1px solid var(--bg-border);transition:all var(--transition)}.step-small-row.active{border-color:#2563eb40;background:#2563eb0a}.step-small-row.completed{border-color:#10b9811f;background:#10b98103}.step-small-result{margin-left:auto;font-weight:600;color:var(--token-number)}.footer{text-align:center;padding:var(--space-lg) 0;border-top:1px solid rgba(255,255,255,.04);margin-top:var(--space-2xl);font-size:.8rem;color:var(--text-muted)}.footer-link{color:var(--primary-end);text-decoration:none;transition:color var(--transition)}.footer-link:hover{color:#fff}.scroll-hint-badge{font-size:.62rem;font-weight:700;text-transform:uppercase;color:var(--primary-start);background:#2563eb0d;border:1px solid rgba(37,99,235,.15);padding:2px 6px;border-radius:var(--radius-sm);letter-spacing:.04em;display:none}@media (max-width: 768px){.app-container{padding:0 var(--space-md)}.pipeline-header{padding:8px var(--space-md)}.pipeline-badge{width:32px;height:32px;font-size:.75rem;border-radius:8px}.pipeline-title{font-size:.88rem}.stepper-header{flex-wrap:wrap;gap:var(--space-xs)}.stepper-progress-bar{order:3;width:100%;margin:var(--space-xs) 0}.tokenizer-toolbar{flex-direction:column;align-items:flex-start;gap:var(--space-sm)}.scanner-log{width:100%}.scroll-hint-badge{display:inline-block}}@media (max-width: 480px){.hero{padding:var(--space-xl) 0 var(--space-md)}.brand-title{font-size:.82rem}.glass-card{padding:var(--space-md)}.chips-container{flex-wrap:nowrap;overflow-x:auto;padding-bottom:var(--space-xs);-webkit-overflow-scrolling:touch;scrollbar-width:none}.chips-container::-webkit-scrollbar{display:none}.chip{flex-shrink:0}.stepper-controls{gap:4px;width:100%;justify-content:space-between}.stepper-controls .control-btn{padding:6px var(--space-xs);font-size:.75rem;flex:1;justify-content:center}.stepper-controls .control-btn span{display:none}.char-stream{font-size:1.1rem}.char-cell{padding:1px 2px}.step-operation-math{font-size:1.25rem;word-break:break-all}}