:root{--primary-color: #0d6efd;--secondary-color: #6c757d;--success-color: #198754;--danger-color: #dc3545;--warning-color: #ffc107;--info-color: #0dcaf0;--light-color: #f8f9fa;--dark-color: #212529;--purple-color: #6f42c1;--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-danger: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);--gradient-success: linear-gradient(135deg, #00b894 0%, #00a085 100%);--gradient-warning: linear-gradient(135deg, #fdcb6e 0%, #e17055 100%);--shadow-sm: 0 .125rem .25rem rgba(0, 0, 0, .075);--shadow: 0 .5rem 1rem rgba(0, 0, 0, .15);--shadow-lg: 0 1rem 3rem rgba(0, 0, 0, .175);--border-radius: .5rem;--border-radius-lg: 1rem;--border-radius-xl: 1.5rem}*{box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe 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pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.how-it-works-visual{position:relative}.cell-stage{transition:all .3s ease;position:relative;overflow:hidden}.cell-stage:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.6),transparent);transition:left .5s ease}.cell-stage:hover:before{left:100%}.cell-stage:hover{transform:translate(10px);box-shadow:var(--shadow)}.thermometer-container{position:relative}.thermo-bg{position:relative;overflow:hidden}.thermo-mercury{background:var(--gradient-danger);animation:mercury-rise 3s ease-out}@keyframes mercury-rise{0%{height:0%}to{height:60%}}.temp-item{transition:all .3s ease}.temp-item:hover{background-color:var(--light-color)!important;transform:translate(5px)}.chat-simulation{border-radius:var(--border-radius);overflow:hidden;box-shadow:var(--shadow)}.user-message{border-radius:18px 18px 4px}.ai-message{border-radius:18px 18px 18px 4px}.typing-indicator{padding:.5rem 1rem;background-color:var(--light-color)}.typing-indicator i{animation:typing 1.5s infinite}@keyframes typing{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-10px)}}.testimonial-card{transition:all .3s ease;position:relative;overflow:hidden}.testimonial-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary);transform:scaleX(0);transition:transform .3s ease}.testimonial-card:hover:before{transform:scaleX(1)}.testimonial-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.author-avatar{font-size:1.2rem;font-weight:700}.pricing-card{transition:all .3s ease;position:relative}.pricing-card:hover{transform:translateY(-10px);box-shadow:var(--shadow-lg)}.pricing-card.bg-primary{background:var(--gradient-primary)!important;transform:scale(1.05)}.pricing-card.bg-primary:hover{transform:scale(1.08) translateY(-5px)}.price{position:relative}.bg-gradient-primary{background:var(--gradient-primary)!important}.bg-gradient-danger{background:var(--gradient-danger)!important}.bg-gradient-success{background:var(--gradient-success)!important}.bg-gradient-warning{background:var(--gradient-warning)!important}.btn{border-radius:var(--border-radius);font-weight:600;transition:all .3s ease;position:relative;overflow:hidden}.btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s 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ease;padding:.5rem;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px}.social-links a:hover{background-color:var(--primary-color);transform:translateY(-3px)}@media (max-width: 768px){.hero-section{padding:3rem 0!important}.display-4{font-size:2rem!important}.hero-stats .stat-item h3{font-size:1.5rem}.pricing-card.bg-primary{transform:none;margin-top:1rem}.step-badge{font-size:1.2rem;width:50px!important;height:50px!important}}@media (max-width: 576px){.hero-cta .btn{display:block;width:100%;margin-bottom:.5rem}.hero-cta .btn:last-child{margin-bottom:0}.immune-card{margin-bottom:1rem}.antibody-card{margin-bottom:.5rem}}.loading-spinner{width:40px;height:40px;border:4px solid #f3f3f3;border-top:4px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--light-color)}::-webkit-scrollbar-thumb{background:var(--primary-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#0056b3}.btn:focus,.nav-link:focus{outline:2px solid var(--primary-color);outline-offset:2px}@media (prefers-contrast: high){.hero-section:before{opacity:.1}.shadow,.shadow-sm,.shadow-lg{box-shadow:0 0 0 2px var(--dark-color)!important}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}html{scroll-behavior:auto}}@media print{.hero-section,footer,.navbar{display:none!important}body{font-size:12pt;line-height:1.4;color:#000}.container{max-width:100%!important}}