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12px}}:root{--primary-bg:#2d3748;--secondary-bg:#1a202c;--accent-bg:#4a5568;--primary-blue:#4299e1;--primary-blue-dark:#3182ce;--success-green:#48bb78;--danger-red:#e53e3e;--text-white:#fff;--text-gray-light:#e2e8f0;--text-gray:#a0aec0;--text-gray-dark:#718096;--border-gray:#4a5568;--spacing-xs:0.25rem;--spacing-sm:0.5rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:2rem;--spacing-2xl:3rem;--font-sm:0.875rem;--font-base:1rem;--font-lg:1.125rem;--font-xl:1.25rem;--font-2xl:1.5rem;--font-3xl:2rem;--border-radius-sm:4px;--border-radius:8px;--border-radius-lg:12px;--shadow-sm:0 1px 2px rgba(0,0,0,.1);--shadow:0 4px 6px rgba(0,0,0,.1);--shadow-lg:0 10px 15px rgba(0,0,0,.1);--transition-fast:0.15s ease;--transition:0.3s ease;--transition-slow:0.5s ease}.page-container{position:fixed;top:0;left:0;width:100%;height:100%;background-color:var(--primary-bg);color:var(--text-white);overflow-y:auto}.tool-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:var(--spacing-xl);max-width:600px;margin:0 auto}.tool-container.large{max-width:1000px}.tool-title{font-size:var(--font-3xl);margin-bottom:var(--spacing-xl);text-align:center;color:var(--text-gray-light)}.form-group{margin-bottom:var(--spacing-lg);width:100%}.form-label{display:block;margin-bottom:var(--spacing-sm);font-weight:500;color:var(--text-white)}.form-input{width:100%;padding:12px var(--spacing-md);border:2px solid var(--border-gray);border-radius:var(--border-radius);background-color:var(--secondary-bg);color:var(--text-white);font-size:var(--font-base);transition:border-color var(--transition);box-sizing:border-box}.form-input:focus{outline:none;border-color:var(--primary-blue);box-shadow:0 0 0 3px rgba(66,153,225,.1)}.form-input::-moz-placeholder{color:var(--text-gray-dark)}.form-input::placeholder{color:var(--text-gray-dark)}.card{background-color:var(--secondary-bg);padding:var(--spacing-lg);border-radius:var(--border-radius);box-shadow:var(--shadow);margin-bottom:var(--spacing-lg)}.error-message{background-color:var(--danger-red)}.error-message,.success-message{color:var(--text-white);padding:var(--spacing-md);border-radius:var(--border-radius);text-align:center;margin-top:var(--spacing-md);font-size:var(--font-sm)}.success-message{background-color:var(--success-green)}@media (max-width:768px){.tool-container{padding:var(--spacing-md);min-height:100vh}.tool-title{font-size:var(--font-2xl);margin-bottom:var(--spacing-lg)}}@media (max-width:480px){.tool-container{padding:var(--spacing-sm)}.tool-title{font-size:var(--font-xl);margin-bottom:var(--spacing-md)}.form-input{font-size:16px;padding:14px var(--spacing-md)}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.text-center{text-align:center}.mb-0{margin-bottom:0}.mb-1{margin-bottom:var(--spacing-xs)}.mb-2{margin-bottom:var(--spacing-sm)}.mb-3{margin-bottom:var(--spacing-md)}.mb-4{margin-bottom:var(--spacing-lg)}.mb-5{margin-bottom:var(--spacing-xl)}.mt-0{margin-top:0}.mt-1{margin-top:var(--spacing-xs)}.mt-2{margin-top:var(--spacing-sm)}.mt-3{margin-top:var(--spacing-md)}.mt-4{margin-top:var(--spacing-lg)}.mt-5{margin-top:var(--spacing-xl)}