:root{--primary-color: #667eea;--primary-dark: #764ba2;--success-color: #10b981;--error-color: #ef4444;--warning-color: #f59e0b;--text-primary: #1f2937;--text-secondary: #6b7280;--border-color: #e5e7eb;--bg-gray: #f9fafb;--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;--spacing-unit: 1rem}*{box-sizing:border-box;margin:0;padding:0}body{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);line-height:1.6;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh}.dif-form-container{max-width:800px;margin:2rem auto;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);overflow:hidden;animation:slideUp .4s ease-out}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.dif-form-header{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-dark) 100%);color:#fff;padding:2.5rem 2rem;text-align:center;position:relative;overflow:hidden}.dif-form-header:before{content:"";position:absolute;top:-50%;right:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 70%);animation:pulse 8s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1);opacity:.5}50%{transform:scale(1.1);opacity:.8}}.practice-logo{max-width:180px;height:auto;margin-bottom:1rem;filter:drop-shadow(0 4px 6px rgba(0,0,0,.2));position:relative;z-index:1}.dif-form-header h1{font-size:1.875rem;font-weight:700;margin-bottom:.5rem;position:relative;z-index:1}.dif-form-header p{font-size:1rem;opacity:.95;font-weight:400;position:relative;z-index:1}.progress-indicator{display:flex;justify-content:space-between;padding:1.5rem 2rem;background:var(--bg-gray);border-bottom:1px solid var(--border-color)}.progress-step{flex:1;text-align:center;position:relative;padding:0 .5rem}.progress-step:before{content:"";position:absolute;top:1.25rem;left:0;width:100%;height:2px;background:var(--border-color);z-index:0}.progress-step:first-child:before{left:50%;width:50%}.progress-step:last-child:before{width:50%}.progress-step-circle{width:2.5rem;height:2.5rem;border-radius:50%;background:#fff;border:2px solid var(--border-color);display:flex;align-items:center;justify-content:center;margin:0 auto .5rem;position:relative;z-index:1;font-weight:600;transition:all .3s ease}.progress-step.active .progress-step-circle{background:var(--primary-color);border-color:var(--primary-color);color:#fff;transform:scale(1.1)}.progress-step.completed .progress-step-circle{background:var(--success-color);border-color:var(--success-color);color:#fff}.progress-step.completed:before{background:var(--success-color)}.progress-step-label{font-size:.875rem;color:var(--text-secondary);font-weight:500}.progress-step.active .progress-step-label{color:var(--primary-color);font-weight:600}.dif-form-body{padding:2.5rem 2rem}.form-section-header{margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:2px solid var(--border-color)}.form-section-header h2{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:.25rem}.form-section-header p{font-size:.875rem;color:var(--text-secondary)}.form-group{margin-bottom:1.5rem}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1rem;margin-bottom:1.5rem}label{display:block;font-size:.875rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem;transition:color .2s ease}.required:after{content:"*";color:var(--error-color);margin-left:.25rem}input[type=text],input[type=email],input[type=tel],input[type=date],input[type=number],textarea,select{width:100%;padding:.75rem 1rem;font-size:1rem;border:2px solid var(--border-color);border-radius:var(--radius-md);background:#fff;color:var(--text-primary);transition:all .2s ease;font-family:inherit}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #667eea1a}input:hover:not(:focus),textarea:hover:not(:focus),select:hover:not(:focus){border-color:var(--text-secondary)}textarea{min-height:120px;resize:vertical}input.error,textarea.error,select.error{border-color:var(--error-color)}input.error:focus,textarea.error:focus,select.error:focus{box-shadow:0 0 0 3px #ef44441a}input:disabled,textarea:disabled,select:disabled{background:var(--bg-gray);cursor:not-allowed;opacity:.6}.error-message{display:flex;align-items:center;gap:.5rem;color:var(--error-color);font-size:.875rem;margin-top:.5rem;animation:shake .4s ease}.error-message:before{content:"⚠";font-size:1rem}.helper-text{font-size:.875rem;color:var(--text-secondary);margin-top:.5rem}.checkbox-group,.radio-group{display:flex;flex-direction:column;gap:.75rem}.checkbox-wrapper,.radio-wrapper{display:flex;align-items:flex-start;gap:.75rem;padding:1rem;border:2px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease}.checkbox-wrapper:hover,.radio-wrapper:hover{border-color:var(--primary-color);background:#667eea05}.checkbox-wrapper input[type=checkbox],.radio-wrapper input[type=radio]{width:1.25rem;height:1.25rem;cursor:pointer;margin-top:.125rem;flex-shrink:0;accent-color:var(--primary-color)}.checkbox-label,.radio-label{flex:1;font-size:.9375rem;font-weight:500;line-height:1.5;color:var(--text-primary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.875rem 1.75rem;font-size:1rem;font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;font-family:inherit;text-decoration:none;position:relative;overflow:hidden}.btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#ffffff4d;transform:translate(-50%,-50%);transition:width .6s,height .6s}.btn:active:before{width:300px;height:300px}.btn-primary{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-dark) 100%);color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:#fff;color:var(--primary-color);border:2px solid var(--primary-color)}.btn-secondary:hover{background:var(--bg-gray)}.btn-success{background:var(--success-color);color:#fff}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn-loading{position:relative;color:transparent}.btn-loading:after{content:"";position:absolute;width:1.25rem;height:1.25rem;top:50%;left:50%;margin-left:-.625rem;margin-top:-.625rem;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}.button-group{display:flex;gap:1rem;margin-top:2rem;padding-top:2rem;border-top:1px solid var(--border-color)}.button-group.space-between{justify-content:space-between}.button-group.center{justify-content:center}.alert{padding:1rem 1.25rem;border-radius:var(--radius-md);margin-bottom:1.5rem;border-left:4px solid;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}.alert-info{background:#3b82f61a;border-color:#3b82f6;color:#1e40af}.alert-success{background:#10b9811a;border-color:var(--success-color);color:#065f46}.alert-warning{background:#f59e0b1a;border-color:var(--warning-color);color:#92400e}.alert-error{background:#ef44441a;border-color:var(--error-color);color:#991b1b}.success-screen{text-align:center;padding:3rem 2rem}.success-icon{width:5rem;height:5rem;margin:0 auto 1.5rem;background:var(--success-color);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:2.5rem;animation:scaleIn .5s ease-out}.success-screen h2{font-size:1.875rem;margin-bottom:1rem;color:var(--text-primary)}.success-screen p{font-size:1.125rem;color:var(--text-secondary);margin-bottom:2rem}@media (max-width: 768px){.dif-form-container{margin:0;border-radius:0;min-height:100vh}.dif-form-header{padding:2rem 1.5rem}.dif-form-header h1{font-size:1.5rem}.dif-form-body{padding:1.5rem 1rem}.form-row{grid-template-columns:1fr}.button-group{flex-direction:column}.button-group .btn{width:100%}.progress-indicator{padding:1rem}.progress-step-label{font-size:.75rem}}@media print{body{background:#fff}.dif-form-container{box-shadow:none;max-width:100%}.button-group,.btn{display:none}}.skeleton{background:linear-gradient(90deg,var(--bg-gray) 25%,#f3f4f6 50%,var(--bg-gray) 75%);background-size:200% 100%;animation:loading 1.5s ease-in-out infinite;border-radius:var(--radius-md)}@keyframes loading{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-text{height:1rem;margin-bottom:.5rem}.skeleton-input{height:2.75rem;margin-bottom:1.5rem}.patient-info-display{background:#f8f9fa;border:2px solid #dee2e6;border-radius:8px;padding:20px;margin:20px 0}.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px;margin-bottom:15px}.info-grid div{font-size:14px}.btn-link{background:none;border:none;color:#667eea;text-decoration:underline;cursor:pointer;font-size:14px}.pain-slider{width:100%;height:8px;border-radius:4px;background:linear-gradient(to right,#28a745,#ffc107,#dc3545);outline:none;-webkit-appearance:none}.pain-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:24px;height:24px;border-radius:50%;background:#fff;border:3px solid #667eea;cursor:pointer;box-shadow:0 2px 4px #0003}.pain-slider::-moz-range-thumb{width:24px;height:24px;border-radius:50%;background:#fff;border:3px solid #667eea;cursor:pointer;box-shadow:0 2px 4px #0003}.slider-labels{display:flex;justify-content:space-between;margin-top:8px;font-size:12px;color:#666}.radio-label{display:flex;align-items:center;padding:12px 16px;border:2px solid #e0e6ed;border-radius:8px;cursor:pointer;transition:all .2s}.radio-label:hover{border-color:#667eea;background:#f8f9fa}.radio-label input[type=radio]{margin-right:10px}.radio-label input[type=radio]:checked+span{font-weight:600;color:#667eea}.appointment-summary{background:#fff;border:2px solid #667eea;border-radius:8px;padding:20px;margin:20px 0}.appointment-summary p{margin:10px 0;font-size:16px}.next-steps{background:#e7f3ff;border-left:4px solid #0066cc;padding:15px;margin:20px 0;border-radius:4px}.info-box{background:#fff3cd;border-left:4px solid #ffc107;padding:15px;margin:20px 0;border-radius:4px}.info-box p{margin:8px 0}.appointment-form-container{max-width:800px;margin:0 auto;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Arial,sans-serif}.form-header{text-align:center;margin-bottom:40px;padding-bottom:30px;border-bottom:3px solid #667eea}.practice-logo{max-width:180px;max-height:80px;margin-bottom:20px;object-fit:contain}.form-header h2{color:#2c3e50;font-size:28px;font-weight:700;margin:10px 0}.form-header h3{color:#667eea;font-size:22px;font-weight:600;margin:15px 0 10px}.form-subtitle{color:#666;font-size:16px;margin:10px 0 0}.progress-steps{display:flex;align-items:center;justify-content:center;margin:40px 0;padding:0 20px}.step{display:flex;flex-direction:column;align-items:center;position:relative;flex:0 0 auto}.step-number{width:50px;height:50px;border-radius:50%;background:#e0e6ed;color:#8899a6;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;transition:all .3s ease;border:3px solid #e0e6ed;z-index:2}.step.active .step-number{background:#667eea;color:#fff;border-color:#667eea;box-shadow:0 0 0 4px #667eea33}.step.completed .step-number{background:#28a745;color:#fff;border-color:#28a745}.step-label{margin-top:12px;font-size:14px;font-weight:600;color:#8899a6;text-align:center;transition:color .3s ease}.step.active .step-label{color:#667eea}.step.completed .step-label{color:#28a745}.step-line{height:3px;width:100px;background:#e0e6ed;margin:-25px -10px 0;position:relative;z-index:1}.patient-info-display{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:12px;padding:25px;margin:30px 0;color:#fff;box-shadow:0 4px 12px #667eea4d}.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:15px;margin-bottom:15px}.info-grid div{font-size:15px;padding:8px 0}.info-grid strong{display:block;font-size:12px;text-transform:uppercase;opacity:.9;margin-bottom:4px;letter-spacing:.5px}.btn-link{background:#fff3;border:2px solid rgba(255,255,255,.3);color:#fff;padding:10px 20px;border-radius:6px;cursor:pointer;font-size:14px;font-weight:600;transition:all .2s;display:inline-block}.btn-link:hover{background:#ffffff4d;border-color:#ffffff80;transform:translateY(-1px)}.form-section{background:#fff;border-radius:12px;padding:30px;margin-bottom:25px;box-shadow:0 2px 8px #00000014;border:1px solid #e0e6ed}.form-section h3{color:#2c3e50;font-size:20px;font-weight:700;margin:0 0 8px;padding-bottom:12px;border-bottom:2px solid #f0f3f8}.section-note{color:#666;font-size:14px;margin:0 0 25px;font-style:italic}.form-group{margin-bottom:25px}.form-group label{display:block;font-weight:600;color:#2c3e50;margin-bottom:8px;font-size:15px}.form-group input[type=text],.form-group input[type=email],.form-group input[type=tel],.form-group input[type=date],.form-group select,.form-group textarea{width:100%;padding:12px 16px;border:2px solid #e0e6ed;border-radius:8px;font-size:15px;font-family:inherit;transition:all .2s ease;background:#fff}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.form-group input.error,.form-group select.error,.form-group textarea.error{border-color:#dc3545}.form-group textarea{resize:vertical;min-height:100px;line-height:1.6}.form-help{display:block;font-size:13px;color:#8899a6;margin-top:6px;font-style:italic}.error-message{display:block;color:#dc3545;font-size:13px;margin-top:6px;font-weight:600}.radio-group{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:10px}.radio-label{display:flex;align-items:center;padding:14px 18px;border:2px solid #e0e6ed;border-radius:8px;cursor:pointer;transition:all .2s;background:#fff}.radio-label:hover{border-color:#667eea;background:#f8f9fa;transform:translateY(-1px)}.radio-label input[type=radio]{width:20px;height:20px;margin-right:10px;cursor:pointer;accent-color:#667eea}.radio-label input[type=radio]:checked{background:#667eea}.radio-label span{font-size:15px;color:#2c3e50;font-weight:500}.radio-label input[type=radio]:checked~span{font-weight:700;color:#667eea}.pain-slider{width:100%;height:12px;border-radius:6px;background:linear-gradient(to 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#667eea}.btn-secondary:hover{background:#f8f9fa;transform:translateY(-1px)}.btn-submit{background:linear-gradient(135deg,#28a745,#20c997);color:#fff;box-shadow:0 4px 12px #28a74566;flex:1;max-width:300px;margin-left:auto}.btn-submit:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 16px #28a74580}.btn:disabled{opacity:.6;cursor:not-allowed}.success-container{max-width:600px;margin:60px auto;padding:40px;text-align:center;background:#fff;border-radius:16px;box-shadow:0 8px 24px #0000001f}.success-icon{width:80px;height:80px;background:linear-gradient(135deg,#28a745,#20c997);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 25px;font-size:48px;color:#fff;font-weight:700;box-shadow:0 4px 16px #28a7454d}.success-container h2{color:#2c3e50;font-size:28px;margin:20px 0;font-weight:700}.success-details{text-align:left;margin:30px 0}.appointment-summary{background:linear-gradient(135deg,#f8f9fa,#e9ecef);border:2px solid #667eea;border-radius:12px;padding:25px;margin:20px 0}.appointment-summary p{margin:12px 0;font-size:16px;color:#2c3e50}.appointment-summary strong{color:#667eea;font-weight:700}.next-steps{background:#e7f3ff;border-left:4px solid #0066cc;padding:18px 20px;margin:20px 0;border-radius:8px;font-size:15px;line-height:1.6;color:#004085}.confirmation-email{margin-top:25px;padding-top:25px;border-top:2px solid #e0e6ed}.confirmation-email p{font-size:14px;color:#666}.confirmation-email strong{color:#667eea;font-weight:600}@media (max-width: 768px){.appointment-form-container{padding:15px}.progress-steps{padding:0 10px}.step-line{width:60px}.step-number{width:40px;height:40px;font-size:18px}.step-label{font-size:12px}.form-section{padding:20px}.info-grid,.radio-group{grid-template-columns:1fr}.form-navigation{flex-direction:column}.btn-primary,.btn-submit{margin-left:0;max-width:100%}}.referral-form-container{max-width:800px;margin:0 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.2s}.btn-remove:hover{background:#c82333;transform:translateY(-1px)}.btn-add-friend{width:100%;background:#fff;color:#667eea;border:2px dashed #667eea;padding:16px;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s;margin-top:15px}.btn-add-friend:hover{background:#f8f9fa;border-color:#764ba2;color:#764ba2}.email-preview{background:#fff;border:2px solid #667eea;border-radius:12px;padding:25px;margin:25px 0;box-shadow:0 2px 8px #667eea1a}.email-preview h4{margin:0 0 15px;color:#667eea;font-size:18px;font-weight:700}.preview-content{background:#f8f9fa;border-radius:8px;padding:20px;font-size:15px;line-height:1.8;color:#2c3e50}.preview-content p{margin:12px 0}.personal-message-preview{background:#fff;border-left:4px solid #667eea;padding:15px;margin:20px 0;border-radius:4px}.personal-message-preview 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