:root{--primary-color:#2563eb;--primary-hover:#1d4ed8;--secondary-color:#64748b;--success-color:#10b981;--danger-color:#ef4444;--background-color:#f3f4f6;--surface-color:#fff;--text-main:#111827;--text-secondary:#4b5563;--border-color:#e5e7eb;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--radius-md:.5rem;--radius-lg:.75rem;--font-family:"Inter", system-ui, -apple-system, sans-serif}body{font-family:var(--font-family);background-color:var(--background-color);color:var(--text-main);-webkit-font-smoothing:antialiased;margin:0;line-height:1.5;overflow-y:auto}.App{flex-direction:column;gap:2rem;max-width:1440px;margin:0 auto;padding:2rem 2rem 4rem;display:flex}header{text-align:center;margin-bottom:1rem}header h1{color:var(--text-main);letter-spacing:-.025em;background:linear-gradient(135deg, var(--primary-color), 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(max-width:1200px){.mapping-interface{height:auto;min-height:auto}.data-sources,.document-preview{height:600px}}@media (max-width:768px){.mapping-interface{grid-template-columns:1fr}.data-sources{height:400px}}.data-sources{flex-direction:column;height:100%;display:flex;overflow:hidden}.data-sources ul{flex:1;margin:0;padding:0 5px 0 0;list-style:none;overflow-y:auto}.data-sources li{margin-bottom:.5rem}.field-button{text-align:left;border:1px solid var(--border-color);width:100%;color:var(--text-main);border-radius:var(--radius-md);background-color:#fff;padding:.75rem 1rem;font-size:.9rem;transition:all .2s}.field-button:hover:not(.selected){border-color:var(--primary-color);background-color:#f9fafb}.field-button.selected{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color);box-shadow:var(--shadow-md)}.tabs-container{flex-direction:column;gap:0;display:flex}.tabs-header{gap:10px;margin-bottom:-1px;padding-left:10px;display:flex}.tab-button{color:var(--text-secondary);border-top-left-radius:var(--radius-md);border-top-right-radius:var(--radius-md);cursor:pointer;box-shadow:none;background-color:#e5e7eb;border:none;padding:12px 24px;font-weight:600;transition:all .2s}.tab-button:hover{background-color:#d1d5db;transform:none}.tab-button.active{color:var(--primary-color);z-index:1;background-color:#fff;position:relative;box-shadow:0 -2px 4px 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