:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;color:#333}.app-container{max-width:800px;margin:0 auto;padding:2rem 1rem;min-height:100vh}.app-header{text-align:center;margin-bottom:3rem;color:#fff}.app-header h1{font-size:2.5rem;font-weight:700;margin-bottom:.5rem;text-shadow:0 2px 4px rgba(0,0,0,.1)}.app-header p{font-size:1.1rem;opacity:.9}.app-main{background:#fff;border-radius:16px;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a;overflow:hidden}.test-section{padding:2rem;border-bottom:1px solid #e5e7eb}.test-section h2{font-size:1.5rem;font-weight:600;margin-bottom:1rem;color:#1f2937!important}.instruction{color:#6b7280;margin-bottom:2rem;line-height:1.6}.button-group{display:flex;gap:1rem;flex-wrap:wrap}.test-button{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;min-width:180px;display:flex;align-items:center;justify-content:center;gap:.5rem}.test-button:disabled{cursor:not-allowed;opacity:.6}.test-button.primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.test-button.primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 10px 20px #667eea66}.test-button.secondary{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff}.test-button.secondary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 10px 20px #f093fb66}.result-section{padding:2rem;border-bottom:1px solid #e5e7eb}.error-box,.success-box{border-radius:8px;padding:1.5rem;margin-bottom:1rem}.error-box{background:#fef2f2;border:1px solid #fecaca;color:#dc2626}.success-box{background:#f0fdf4;border:1px solid #bbf7d0;color:#16a34a}.error-box h3,.success-box h3{margin-bottom:.75rem;font-size:1.1rem}.error-box pre,.success-box pre{background:#0000000d;padding:1rem;border-radius:6px;font-size:.875rem;overflow-x:auto;white-space:pre-wrap;word-break:break-word}.info-section{padding:2rem}.info-section h3{font-size:1.25rem;font-weight:600;margin-bottom:1rem;color:#1f2937}.info-section ol{padding-left:1.5rem;line-height:1.8;color:#4b5563}.info-section li{margin-bottom:.5rem}@media (max-width: 640px){.app-container{padding:1rem .5rem}.app-header h1{font-size:2rem}.button-group{flex-direction:column}.test-button{min-width:100%}.test-section,.result-section,.info-section{padding:1.5rem}}@keyframes spin{to{transform:rotate(360deg)}}.test-button:disabled .loading-icon{animation:spin 1s linear infinite}.input-group{display:flex;flex-direction:column;gap:1.5rem}.input-field{display:flex;flex-direction:column;gap:.5rem}.input-field label{font-weight:600;color:#1f2937!important;font-size:.875rem;text-transform:uppercase;letter-spacing:.5px;margin-bottom:.25rem}.input-field input{padding:.75rem 1rem;border:2px solid #d1d5db;border-radius:8px;font-size:1rem;transition:all .2s ease;background:#fff;color:#1f2937}.input-field input:focus{outline:none;border-color:#667eea;background:#fff;box-shadow:0 0 0 3px #667eea1a}.input-field input::placeholder{color:#9ca3af}@media (max-width: 640px){.input-group{gap:1rem}.input-field input{font-size:16px}}