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h3{margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid var(--border-color);color:var(--gray-700);flex-shrink:0}@media (max-width: 1024px){.side-by-side{grid-template-columns:1fr;gap:1.5rem}}@media (max-width: 768px){.view-controls{flex-direction:column;align-items:stretch}.paste-content{padding:1rem;min-height:300px}.text-box{font-size:1rem}}.account-container{max-width:800px;margin:0 auto;background-color:var(--bg-color);border:1px solid var(--border-color);border-radius:.5rem;padding:2rem}.account-container h2{margin-bottom:1rem;color:var(--gray-900)}.header{background-color:var(--bg-color);border-bottom:1px solid var(--border-color);padding:1rem 0}.header-container{max-width:1200px;margin:0 auto;padding:0 1rem;display:flex;justify-content:space-between;align-items:center}.logo h1{font-size:1.5rem;color:var(--primary-color);font-weight:700}.logo:hover{text-decoration:none;opacity:.8}.nav{display:flex;gap:1.5rem}.nav a{color:var(--gray-700);font-weight:500;transition:color .2s}.nav a:hover{color:var(--primary-color);text-decoration:none}*{box-sizing:border-box;margin:0;padding:0}:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--text-color: #1f2937;--bg-color: #ffffff;--border-color: #e5e7eb;--error-color: #ef4444;--success-color: #10b981;--warning-color: #f59e0b;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-600: #4b5563;--gray-700: #374151;--gray-900: #111827}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--text-color);background-color:var(--gray-50);line-height:1.6}.app{min-height:100vh;display:flex;flex-direction:column}.container{max-width:1600px;margin:0 auto;padding:2rem;flex:1;width:100%}@media (max-width: 768px){.container{padding:1rem}}button{font-family:inherit;cursor:pointer;border:none;outline:none;transition:all .2s}button:disabled{opacity:.6;cursor:not-allowed}input,textarea,select{font-family:inherit;border:1px solid var(--border-color);border-radius:.375rem;padding:.5rem .75rem;outline:none;transition:border-color .2s}input:focus,textarea:focus,select:focus{border-color:var(--primary-color)}a{color:var(--primary-color);text-decoration:none}a:hover{text-decoration:underline}