:root{--primary-color: #0078d4;--primary-hover: #106ebe;--secondary-color: #6c757d;--success-color: #28a745;--danger-color: #dc3545;--warning-color: #ffc107;--info-color: #17a2b8;--light-bg: #f8f9fa;--dark-bg: #343a40;--border-color: #dee2e6;--text-primary: #212529;--text-secondary: #6c757d;--shadow: 0 .125rem .25rem rgba(0,0,0,.075)}*{box-sizing:border-box}body{margin:0;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-primary);background-color:#fff}#root{min-height:100vh;display:flex;flex-direction:column}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.5rem 1rem;font-size:.875rem;font-weight:500;line-height:1.5;border-radius:.25rem;border:1px solid transparent;cursor:pointer;transition:all .15s ease-in-out;text-decoration:none}.btn:disabled{opacity:.65;cursor:not-allowed}.btn-primary{color:#fff;background-color:var(--primary-color);border-color:var(--primary-color)}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover);border-color:var(--primary-hover)}.btn-secondary{color:#fff;background-color:var(--secondary-color);border-color:var(--secondary-color)}.btn-secondary:hover:not(:disabled){background-color:#5a6268;border-color:#545b62}.btn-block{width:100%}.btn-sm{padding:.25rem .5rem;font-size:.75rem}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.25rem;font-weight:500;font-size:.875rem}.form-input{display:block;width:100%;padding:.375rem .75rem;font-size:.875rem;line-height:1.5;color:var(--text-primary);background-color:#fff;background-clip:padding-box;border:1px solid var(--border-color);border-radius:.25rem;transition:border-color .15s ease-in-out,box-shadow .15s ease-in-out}.form-input:focus{outline:0;border-color:var(--primary-color);box-shadow:0 0 0 .2rem #007bff40}.form-input.error{border-color:var(--danger-color)}.error-message{display:block;margin-top:.25rem;font-size:.75rem;color:var(--danger-color)}.alert{padding:.75rem 1.25rem;margin-bottom:1rem;border:1px solid transparent;border-radius:.25rem}.alert-error{color:#721c24;background-color:#f8d7da;border-color:#f5c6cb}.home-page{padding:2rem}.welcome-section{text-align:center;margin-bottom:3rem}.welcome-section h1{margin:0 0 .5rem;font-size:2rem;color:var(--primary-color)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin-bottom:3rem}.feature-card{padding:1.5rem;text-align:center;background-color:var(--light-bg);border-radius:.5rem;text-decoration:none;color:var(--text-primary);transition:transform .2s,box-shadow .2s}.feature-card:hover{transform:translateY(-2px);box-shadow:0 .5rem 1rem #00000026}.feature-icon{font-size:3rem;margin-bottom:.5rem}.feature-card h3{margin:0 0 .5rem;font-size:1.25rem}.feature-card p{margin:0;font-size:.875rem;color:var(--text-secondary)}.quick-tips{margin-bottom:2rem}.quick-tips h2{font-size:1.5rem;margin-bottom:1rem}.quick-tips ul{list-style:none;padding:0}.quick-tips li{padding:.5rem 0 .5rem 1.5rem;position:relative}.quick-tips li:before{content:"✓";position:absolute;left:0;color:var(--success-color);font-weight:700}.cta-section{text-align:center}.loading-spinner{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem}.spinner{width:40px;height:40px;position:relative}.spinner-circle{box-sizing:border-box;position:absolute;width:100%;height:100%;border:3px solid var(--border-color);border-radius:50%;border-top-color:var(--primary-color);animation:spin 1s linear infinite}.spinner-message{margin-top:1rem;color:var(--text-secondary);font-size:.875rem}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 768px){.features-grid{grid-template-columns:1fr}.home-page{padding:1rem}}