*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #4F46E5;--primary-dark: #4338CA;--primary-light: #6366F1;--secondary-color: #10B981;--accent-color: #F59E0B;--text-primary: #1F2937;--text-secondary: #6B7280;--bg-primary: #FFFFFF;--bg-secondary: #F9FAFB;--bg-tertiary: #F3F4F6;--border-color: #E5E7EB;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:var(--text-primary);background-color:var(--bg-secondary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;text-decoration:none}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background-color:var(--bg-tertiary);color:var(--text-primary)}.btn-secondary:hover:not(:disabled){background-color:var(--border-color)}.btn-success{background-color:var(--secondary-color);color:#fff}.btn-success:hover:not(:disabled){background-color:#059669;transform:translateY(-1px);box-shadow:var(--shadow-md)}.card{background:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:2rem;margin-bottom:2rem}.input-group{margin-bottom:1.5rem}.input-group label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--text-primary)}.input-group input[type=text],.input-group input[type=number],.input-group input[type=file],.input-group select{width:100%;padding:.75rem;border:2px solid var(--border-color);border-radius:var(--radius-md);font-size:1rem;transition:border-color .2s ease}.input-group input[type=text]:focus,.input-group input[type=number]:focus,.input-group input[type=file]:focus,.input-group select:focus{outline:none;border-color:var(--primary-color)}.input-group input[type=range]{width:100%;height:8px;border-radius:var(--radius-sm);background:var(--bg-tertiary);outline:none}.input-group input[type=range]::-webkit-slider-thumb{appearance:none;width:20px;height:20px;border-radius:50%;background:var(--primary-color);cursor:pointer}.input-group input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--primary-color);cursor:pointer;border:none}.range-value{display:inline-block;min-width:60px;padding:.25rem .75rem;background:var(--bg-tertiary);border-radius:var(--radius-sm);font-weight:600;text-align:center}.loading{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.fade-in{animation:fadeIn .3s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.container{padding:0 .75rem}.card{padding:1.5rem}}