:root{--color-bg-primary: #0f171a;--color-bg-secondary: #16262e;--color-bg-card: #1c2e36;--color-bg-card-hover: #233942;--color-bg-input: #132026;--color-bg-overlay: rgba(15, 23, 26, .85);--gradient-accent: linear-gradient(135deg, #14b8a6, #0d9488, #0f766e);--gradient-accent-hover: linear-gradient(135deg, #2dd4bf, #14b8a6, #0d9488);--gradient-subtle: linear-gradient(135deg, rgba(20, 184, 166, .1), rgba(13, 148, 136, .05));--gradient-glow: linear-gradient(135deg, rgba(45, 212, 191, .25), rgba(20, 184, 166, .1));--gradient-success: linear-gradient(135deg, #10b981, #34d399);--gradient-warning: linear-gradient(135deg, #f59e0b, #fbbf24);--color-text-primary: #f0f9ff;--color-text-secondary: #94a3b8;--color-text-muted: #64748b;--color-text-accent: #2dd4bf;--color-border: rgba(148, 163, 184, .1);--color-border-active: rgba(45, 212, 191, .5);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-glow: 0 0 40px rgba(45, 212, 191, .15);--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--space-3xl: 64px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background:var(--color-bg-primary);color:var(--color-text-primary);min-height:100vh;overflow-x:hidden}#root{min-height:100vh;display:flex;flex-direction:column}body:before{content:"";position:fixed;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 25% 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var(--transition-fast)}.nav-link:hover{color:var(--color-text-primary);background:var(--gradient-subtle)}.header-nav-tabs{display:flex;gap:var(--space-sm);background:var(--color-bg-secondary);padding:6px;border-radius:var(--radius-lg);border:1px solid var(--color-border)}.nav-tab-btn{display:flex;align-items:center;gap:8px;padding:8px 16px;border-radius:var(--radius-md);background:transparent;color:var(--color-text-secondary);font-family:var(--font-sans);font-weight:600;font-size:.9rem;border:none;cursor:pointer;transition:all var(--transition-fast)}.nav-tab-btn:hover{color:var(--color-text-primary);background:var(--color-bg-card-hover)}.nav-tab-btn.active{background:var(--gradient-accent);color:#fff;box-shadow:var(--shadow-sm)}.tab-icon{font-size:1.1em}.upload-section{max-width:800px;margin:0 auto}.hero-area{text-align:center;margin-bottom:var(--space-2xl)}.hero-badge{display:inline-flex;align-items:center;gap:var(--space-sm);padding:6px 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rgba(239,68,68,.2);color:#f87171;cursor:pointer;transition:all var(--transition-fast)}.file-remove-btn:hover{background:#ef444433;color:#fca5a5}.options-row{display:grid;grid-template-columns:1fr auto;gap:var(--space-lg);margin-top:var(--space-xl)}.option-group{display:flex;flex-direction:column;gap:var(--space-sm)}.option-label{display:flex;align-items:center;gap:var(--space-sm);font-size:.82rem;font-weight:600;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.04em}.option-input{padding:10px 14px;background:var(--color-bg-input);border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text-primary);font-family:var(--font-mono);font-size:.85rem;transition:all var(--transition-fast);outline:none}.option-input:focus{border-color:var(--color-border-active);box-shadow:0 0 0 3px 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var(--transition-fast)}.stat-card:hover{border-color:var(--color-border-active);background:var(--color-bg-card-hover)}.stat-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-md);flex-shrink:0}.stat-icon-pages{background:#2dd4bf1a;color:#5eead4}.stat-icon-regions{background:#0ea5e91a;color:#38bdf8}.stat-icon-time{background:#10b9811a;color:#34d399}.stat-icon-chars{background:#f59e0b1a;color:#fbbf24}.stat-info{display:flex;flex-direction:column}.stat-value{font-size:1.3rem;font-weight:700;color:var(--color-text-primary);font-family:var(--font-mono)}.stat-label{font-size:.72rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em;font-weight:500}.page-selector{display:flex;gap:var(--space-sm);margin-bottom:var(--space-lg);overflow-x:auto;padding-bottom:var(--space-xs)}.page-tab{padding:8px 16px;background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-full);color:var(--color-text-secondary);font-size:.82rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;font-family:var(--font-sans)}.page-tab:hover{border-color:var(--color-border-active);color:var(--color-text-primary)}.page-tab.active{background:var(--gradient-accent);border-color:transparent;color:#fff}.tabs{display:flex;gap:2px;background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:4px;margin-bottom:var(--space-lg)}.tab{flex:1;display:flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:10px var(--space-md);background:none;border:none;border-radius:var(--radius-md);color:var(--color-text-muted);font-family:var(--font-sans);font-size:.82rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.tab:hover{color:var(--color-text-primary);background:#ffffff08}.tab.active{background:var(--gradient-subtle);color:var(--color-text-accent);border:1px solid var(--color-border-active)}.tab-content{min-height:300px}.overview-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-lg);margin-bottom:var(--space-lg)}.overview-card{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden}.card-title{font-size:.85rem;font-weight:600;color:var(--color-text-secondary);padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--color-border);text-transform:uppercase;letter-spacing:.03em}.image-viewer{padding:var(--space-md);display:flex;justify-content:center;background:var(--color-bg-secondary)}.page-image{max-width:100%;max-height:500px;object-fit:contain;border-radius:var(--radius-sm)}.regions-detail{background:var(--color-bg-card);border:1px solid 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var(--transition-fast);flex-shrink:0}.browse-btn:hover{border-color:var(--color-border-active);background:var(--color-bg-card-hover)}.browse-btn:active{transform:scale(.96)}@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr)}.overview-grid{grid-template-columns:1fr}.tabs{flex-wrap:wrap}.tab{flex:1 1 calc(50% - 2px);font-size:.75rem}.save-input-group{flex-direction:column}.step-stats-grid,.comparison-metrics,.region-comparison-cols,.preprocess-images-grid{grid-template-columns:1fr}}.compare-content{display:flex;flex-direction:column;gap:var(--space-lg)}.no-steps-message{text-align:center;padding:var(--space-3xl) var(--space-xl);background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg)}.no-steps-icon{font-size:3rem;margin-bottom:var(--space-lg)}.no-steps-message h4{font-size:1.1rem;font-weight:700;color:var(--color-text-primary);margin-bottom:var(--space-sm)}.no-steps-message 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.card-title{display:flex;align-items:center;gap:var(--space-sm)}.comparison-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-md);padding:var(--space-lg)}.comp-metric{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);border-radius:var(--radius-md);background:var(--color-bg-secondary)}.comp-metric-icon{font-size:1.5rem}.comp-metric-value{font-size:1.3rem;font-weight:700;color:var(--color-text-primary);font-family:var(--font-mono);display:block}.comp-metric-label{font-size:.72rem;color:var(--color-text-muted);display:block}.comp-metric-common{border:1px solid rgba(45,212,191,.15)}.comp-metric-recovered{border:1px solid rgba(99,102,241,.15)}.comp-metric-unique{border:1px solid rgba(245,158,11,.15)}.step-content-viewer{background:var(--color-bg-card);border:1px solid 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solid;background:var(--color-bg-secondary)}.region-col-chars{font-weight:400;font-size:.68rem;color:var(--color-text-muted);margin-left:auto}.region-col-text{padding:var(--space-md);margin:0;font-family:var(--font-mono);font-size:.78rem;line-height:1.6;color:var(--color-text-primary);white-space:pre-wrap;word-break:break-word;max-height:200px;overflow-y:auto;background:var(--color-bg-card)}.tab-compare.active{background:linear-gradient(135deg,#6366f126,#2dd4bf1a)!important;color:#818cf8!important;border-color:#6366f14d!important}.layout-image-full{flex-direction:column}.footer{border-top:1px solid var(--color-border);background:var(--color-bg-secondary);margin-top:auto}.footer-container{display:flex;align-items:center;justify-content:space-between;height:52px}.footer-left{display:flex;align-items:center;gap:var(--space-sm)}.footer-brand{font-size:.78rem;font-weight:700;background:var(--gradient-accent);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.footer-separator{color:var(--color-text-muted);font-size:.75rem}.footer-text{font-size:.75rem;color:var(--color-text-muted)}.footer-tech{font-size:.72rem;color:var(--color-text-muted);font-family:var(--font-mono)}@media(max-width:640px){.footer-container{flex-direction:column;height:auto;padding:var(--space-md) var(--space-lg);gap:var(--space-xs)}}.api-doc-section{padding:var(--space-xl) 0;max-width:1000px;margin:0 auto}.api-doc-header{margin-bottom:var(--space-xl);text-align:center}.api-doc-header h2{font-size:2rem;font-weight:800;background:var(--gradient-accent);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:var(--space-sm)}.api-doc-header p{color:var(--color-text-secondary);font-size:1.1rem}.api-security-card{display:flex;gap:var(--space-md);background:#f59e0b0d;border:1px solid rgba(245,158,11,.2);border-radius:var(--radius-lg);padding:var(--space-lg);margin-bottom:var(--space-xl);align-items:flex-start}.security-icon{font-size:2rem;background:#f59e0b1a;width:48px;height:48px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-md)}.security-content h3{color:#fbbf24;font-size:1.2rem;margin-bottom:var(--space-sm)}.security-content p{color:var(--color-text-secondary);line-height:1.6;margin-bottom:var(--space-md)}.api-tabs{display:flex;gap:var(--space-sm);margin-bottom:var(--space-lg);border-bottom:2px solid var(--color-bg-card);padding-bottom:var(--space-md);overflow-x:auto}.api-tab{background:var(--color-bg-card);border:1px solid var(--color-border);color:var(--color-text-secondary);padding:var(--space-sm) var(--space-lg);border-radius:var(--radius-sm);font-weight:600;font-size:.95rem;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap}.api-tab:hover{color:var(--color-text-primary);background:var(--color-bg-card-hover)}.api-tab.active{color:#fff;background:var(--color-bg-card-hover);border-color:var(--color-text-accent);box-shadow:var(--shadow-glow)}.api-content-box{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-xl)}.endpoint-header{display:flex;align-items:center;gap:var(--space-md);margin-bottom:var(--space-md);padding-bottom:var(--space-md);border-bottom:1px solid var(--color-border)}.method{font-weight:800;padding:4px 12px;border-radius:var(--radius-sm);font-size:.9rem;letter-spacing:.05em}.method-post{background:#10b98126;color:#34d399;border:1px solid rgba(16,185,129,.3)}.method-get{background:#3b82f626;color:#60a5fa;border:1px solid rgba(59,130,246,.3)}.url{font-family:var(--font-mono);font-size:1.1rem;color:var(--color-text-primary)}.endpoint-desc{color:var(--color-text-secondary);margin-bottom:var(--space-xl);font-size:1.05rem}.api-endpoint h4{font-size:1.1rem;margin-bottom:var(--space-md);color:var(--color-text-primary)}.table-container{overflow-x:auto;margin-bottom:var(--space-xl)}.api-table{width:100%;border-collapse:collapse;background:var(--color-bg-secondary);border-radius:var(--radius-md);overflow:hidden}.api-table th{background:#ffffff05;text-align:left;padding:var(--space-md);color:var(--color-text-secondary);font-weight:600;border-bottom:1px solid var(--color-border)}.api-table td{padding:var(--space-md);border-bottom:1px solid var(--color-border);color:var(--color-text-primary)}.api-table code{font-family:var(--font-mono);color:var(--color-text-accent);background:#2dd4bf1a;padding:2px 6px;border-radius:4px;font-size:.9em}.badge{font-size:.75rem;padding:2px 8px;border-radius:var(--radius-full);font-weight:600;text-transform:uppercase}.badge.required{background:#ef444426;color:#f87171;border:1px solid rgba(239,68,68,.3)}.badge.optional{background:#94a3b826;color:#94a3b8;border:1px solid rgba(148,163,184,.3)}.code-block{background:#0d1117;border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-md);overflow-x:auto}.code-block.single-line{padding:var(--space-sm) var(--space-md)}.code-block pre,.code-block code{margin:0;font-family:var(--font-mono);color:#e2e8f0;font-size:.95rem;line-height:1.5}.code-label{position:absolute;top:0;right:0;background:var(--color-bg-secondary);color:var(--color-text-muted);padding:2px 10px;font-size:.75rem;border-bottom-left-radius:var(--radius-sm);border-top-right-radius:var(--radius-sm);font-family:var(--font-sans);font-weight:500}.app{min-height:100vh;display:flex;flex-direction:column;position:relative;z-index:1}.main-content{flex:1;padding:var(--space-2xl) 0}.error-banner{display:flex;align-items:flex-start;gap:var(--space-md);background:linear-gradient(135deg,#ef44441a,#dc26260d);border:1px solid rgba(239,68,68,.25);border-radius:var(--radius-lg);padding:var(--space-lg);margin-top:var(--space-lg)}.error-icon{font-size:1.5rem;flex-shrink:0}.error-content h4{color:#fca5a5;font-size:.95rem;font-weight:600;margin-bottom:var(--space-xs)}.error-content p{color:#f87171;font-size:.85rem;line-height:1.5}.error-close{background:none;border:none;color:var(--color-text-muted);font-size:1.1rem;cursor:pointer;padding:var(--space-xs);margin-left:auto;flex-shrink:0;transition:color var(--transition-fast)}.error-close:hover{color:var(--color-text-primary)}