: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}}*{box-sizing:border-box}#root{min-height:100vh;margin:0;padding:0}.app{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);padding:2rem}.header{text-align:center;color:#fff;margin-bottom:3rem}.header h1{font-size:2.5rem;margin-bottom:.5rem;font-weight:700}.header p{font-size:1.1rem;opacity:.9}.container{max-width:800px;margin:0 auto;background:#fff;border-radius:20px;box-shadow:0 20px 40px #0000001a;padding:3rem}.progress-bar{height:8px;background:#e2e8f0;border-radius:4px;margin-bottom:2rem;overflow:hidden}.progress{height:100%;background:linear-gradient(90deg,#667eea,#764ba2);transition:width .3s ease;border-radius:4px}.step-indicator{display:flex;justify-content:space-between;margin-bottom:3rem;position:relative}.step-indicator:before{content:"";position:absolute;top:50%;left:0;right:0;height:2px;background:#e2e8f0;z-index:0}.step-dot{width:40px;height:40px;border-radius:50%;background:#e2e8f0;display:flex;align-items:center;justify-content:center;font-weight:600;cursor:pointer;transition:all .3s ease;position:relative;z-index:1;color:#64748b}.step-dot.active{background:#667eea;color:#fff}.step-dot.current{transform:scale(1.2);box-shadow:0 0 0 8px #667eea1a}.form-section{margin-bottom:2rem}.step-content h2{color:#1e293b;margin-bottom:.5rem;font-size:1.5rem}.step-content p{color:#64748b;margin-bottom:1.5rem}.input-field,.select-field{width:100%;padding:12px 16px;border:2px solid #e2e8f0;border-radius:8px;font-size:16px;transition:border-color .3s ease;margin-bottom:1rem}.input-field:focus,.select-field:focus{outline:none;border-color:#667eea}.helper-text{font-size:14px;color:#64748b;margin-top:-.5rem;margin-bottom:1rem}.option-group{margin-bottom:1.5rem}.option-group label{display:block;margin-bottom:.5rem;color:#475569;font-weight:500}.navigation-buttons{display:flex;gap:1rem;justify-content:center;margin-bottom:2rem}.btn{padding:12px 24px;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 16px #667eea4d}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:#f1f5f9;color:#475569}.btn-secondary:hover{background:#e2e8f0}.formula-output{background:#f8fafc;border-radius:12px;padding:2rem;margin-top:2rem}.formula-output h3{color:#1e293b;margin-bottom:1rem;font-size:1.2rem}.formula-display{display:flex;align-items:center;gap:1rem;background:#fff;border:2px solid #e2e8f0;border-radius:8px;padding:1rem}.formula-display code{flex:1;font-family:Courier New,monospace;font-size:16px;color:#1e293b;word-break:break-all}.copy-btn{padding:8px 16px;background:#667eea;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;transition:all .3s ease;white-space:nowrap}.copy-btn:hover{background:#5a67d8;transform:translateY(-1px)}.copy-btn.copied{background:#10b981}@media (max-width: 768px){.app{padding:1rem}.container{padding:2rem}.header h1{font-size:2rem}.formula-display{flex-direction:column}.copy-btn{width:100%}}