:root{--primary:#3b82f6;--primary-dark:#2563eb;--primary-light:#60a5fa;--white:#fff;--gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;--gray-300:#d1d5db;--gray-400:#9ca3af;--gray-500:#6b7280;--gray-600:#4b5563;--gray-700:#374151;--gray-800:#1f2937;--gray-900:#111827;--success:#22c55e;--success-bg:#f0fdf4;--success-text:#166534;--spacing-xs:0.5rem;--spacing-sm:0.75rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:2rem;--radius-sm:0.375rem;--radius-md:0.5rem;--radius-lg:0.75rem;--radius-xl:1rem;--transition-fast:150ms ease-in-out;--transition-base:200ms ease-in-out}*{box-sizing:border-box}body{background-color:var(--gray-50);color:var(--gray-800);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.5;margin:0;padding:0}main{background:var(--white);border-radius:var(--radius-xl);box-shadow:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -1px rgba(0,0,0,.06);padding:var(--spacing-lg);transition:box-shadow var(--transition-base)}main:hover{box-shadow:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05)}#invisibleChar{border-radius:var(--radius-lg);display:inline-block;min-height:60px;min-width:60px;transition:all var(--transition-base);user-select:all;-webkit-user-select:all;-moz-user-select:all;-ms-user-select:all}#invisibleChar:hover{background-color:var(--gray-200);transform:scale(1.05)}#invisibleChar:focus{outline:2px solid var(--primary);outline-offset:2px}.bg-gray-100{background-color:var(--gray-100)}.border-dashed{border-style:dashed}.border-gray-300{border-color:var(--gray-300)}.border-gray-400{border-color:var(--gray-400)}#copyBtn{align-items:center;background-color:var(--primary);border:none;border-radius:var(--radius-lg);color:var(--white);cursor:pointer;display:flex;font-size:1rem;font-weight:600;justify-content:center;min-height:48px;padding:var(--spacing-md) var(--spacing-lg);transition:all var(--transition-base);width:100%}#copyBtn:hover{background-color:var(--primary-dark);transform:translateY(-1px)}#copyBtn:active{transform:translateY(0)}#copyBtn:focus{outline:2px solid var(--primary-light);outline-offset:2px}#successMessage{animation:slideIn .3s ease-out;background-color:var(--success-bg);border:1px solid var(--success);border-radius:var(--radius-md);color:var(--success-text);font-size:.875rem;font-weight:500;padding:var(--spacing-sm) var(--spacing-md)}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}#langToggle{background:none;border:none;border-radius:var(--radius-sm);color:var(--gray-600);cursor:pointer;font-size:.875rem;padding:var(--spacing-xs);transition:all var(--transition-base)}#langToggle:hover{background-color:var(--gray-100);color:var(--primary)}#langToggle:focus{outline:2px solid var(--primary);outline-offset:2px}.instructions-section h3{color:var(--gray-700);font-weight:600;margin-bottom:var(--spacing-sm)}.instructions-section ol{margin:0;padding-left:var(--spacing-lg)}.instructions-section li{color:var(--gray-600);margin-bottom:var(--spacing-xs)}h1{color:var(--gray-800);font-size:1.5rem;font-weight:700;margin-bottom:var(--spacing-sm)}.header-description{color:var(--gray-600);font-size:.875rem;margin:0}footer{color:var(--gray-500);font-size:.75rem;margin-top:var(--spacing-lg);text-align:center}@media (max-width:640px){main{margin:var(--spacing-xs);padding:var(--spacing-md)}h1{font-size:1.25rem}#invisibleChar{font-size:2rem;min-height:50px;min-width:50px}.character-container{padding:var(--spacing-lg)}}@media (max-width:480px){.container{padding:var(--spacing-xs)}main{padding:var(--spacing-sm)}#copyBtn{font-size:.875rem;padding:var(--spacing-sm) var(--spacing-md)}}.hidden{display:none!important}.text-center{text-align:center}.text-left{text-align:left}.text-sm{font-size:.875rem}.text-xs{font-size:.75rem}.mb-2{margin-bottom:var(--spacing-xs)}.mb-4{margin-bottom:var(--spacing-md)}.mb-6{margin-bottom:var(--spacing-lg)}.mb-8{margin-bottom:var(--spacing-xl)}.mt-6{margin-top:var(--spacing-lg)}.p-4{padding:var(--spacing-md)}.p-6{padding:var(--spacing-lg)}.p-8{padding:var(--spacing-xl)}.rounded-lg{border-radius:var(--radius-lg)}.rounded-xl{border-radius:var(--radius-xl)}.shadow-lg{box-shadow:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05)}.transition-colors{transition:color var(--transition-base),background-color var(--transition-base),border-color var(--transition-base)}.transition-all{transition:all var(--transition-base)}.space-y-1>*+*{margin-top:var(--spacing-xs)}.list-decimal{list-style-type:decimal}.list-inside{list-style-position:inside}.focus\:outline-none:focus{outline:none}.focus\:ring-2:focus{box-shadow:0 0 0 2px var(--primary-light)}.focus\:ring-offset-2:focus{outline-offset:2px}.sr-only{height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;clip:rect(0,0,0,0);border:0;white-space:nowrap}@media print{body{background:#fff}main{border:1px solid var(--gray-300);box-shadow:none}#copyBtn,#langToggle{display:none}}