:root{--primary-color: #0077c5;--primary-hover: #005a9f;--success-color: #10b981;--error-color: #ef4444;--warning-color: #f59e0b;--text-primary: #1f2937;--text-secondary: #6b7280;--bg-primary: #ffffff;--bg-secondary: #f8fafc;--border-color: #e5e7eb;--border-radius: 8px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1)}.app{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;padding:1rem}.container{background:var(--bg-primary);border-radius:12px;box-shadow:var(--shadow-lg);padding:2rem;width:100%;max-width:480px}.header{text-align:center;margin-bottom:2rem}.header h1{font-size:1.875rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.header p{color:var(--text-secondary);font-size:1rem}.quickbooks-logo{width:64px;height:64px;margin:0 auto 1rem;background:linear-gradient(45deg,#0077c5,#00a651);border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;font-size:1.25rem}.connect-button{width:100%;background:var(--primary-color);color:#fff;border:none;border-radius:var(--border-radius);padding:.875rem 1.5rem;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:.5rem;margin-bottom:1rem}.connect-button:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.connect-button:disabled{background:var(--text-secondary);cursor:not-allowed;transform:none}.spinner{width:18px;height:18px;border:2px solid transparent;border-top:2px solid currentColor;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.progress-container{margin:2rem 0}.progress-steps{list-style:none;padding:0;margin:0}.progress-step{display:flex;align-items:center;padding:.75rem 0;position:relative}.progress-step:not(:last-child):after{content:"";position:absolute;left:11px;top:2.5rem;width:2px;height:100%;background:var(--border-color)}.progress-step.completed:after{background:var(--success-color)}.progress-step.active:after{background:var(--primary-color)}.step-icon{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-right:.75rem;font-size:.75rem;font-weight:600;flex-shrink:0}.step-icon.pending{background:var(--border-color);color:var(--text-secondary)}.step-icon.active{background:var(--primary-color);color:#fff}.step-icon.completed{background:var(--success-color);color:#fff}.step-text{color:var(--text-primary);font-weight:500}.step-text.pending{color:var(--text-secondary)}.error-message{background:#fef2f2;border:1px solid #fecaca;border-radius:var(--border-radius);padding:.875rem;margin:1rem 0;color:#991b1b;font-size:.875rem}.success-message{background:#ecfdf5;border:1px solid #a7f3d0;border-radius:var(--border-radius);padding:.875rem;margin:1rem 0;color:#065f46;font-size:.875rem}.info-section{background:var(--bg-secondary);border-radius:var(--border-radius);padding:1rem;margin-top:1.5rem;border-left:4px solid var(--primary-color)}.info-section h3{font-size:.875rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem}.info-section p{font-size:.8rem;color:var(--text-secondary);margin:0}.button-group{display:flex;gap:.75rem;margin-top:1.5rem}.button-secondary{flex:1;background:transparent;color:var(--text-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius);padding:.75rem 1rem;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease}.button-secondary:hover{background:var(--bg-secondary);color:var(--text-primary)}