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4px 15px #2d6a4f4d}.auth-signup-btn:hover{transform:translateY(-3px);box-shadow:0 6px 25px #2d6a4f66;background:linear-gradient(135deg,#1b4332,#2d6a4f)}.auth-signup-btn:active{transform:translateY(-1px)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}@media(max-width:768px){.auth-required-box{margin:2rem 1rem;padding:2rem 1.5rem}.auth-icon{font-size:3rem}.auth-title{font-size:1.5rem}.auth-message{font-size:1rem;padding:0}.auth-signup-btn{padding:.875rem 2rem;font-size:1rem}}@media(max-width:480px){.auth-required-box{padding:1.5rem 1rem}.auth-icon{font-size:2.5rem}.auth-title{font-size:1.3rem}.auth-message{font-size:.95rem}}.card-icon{width:80px;height:80px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1rem;box-shadow:0 4px 15px #0000001a;transition:transform .3s ease}.card-icon img{width:50px;height:50px;object-fit:contain}.card-icon img.keep-original-color{filter:none}.disease-card:hover .card-icon{transform:scale(1.1)}.card-icon span{font-size:2.5rem}.about-page{min-height:100vh;background:linear-gradient(135deg,#f5f7fa,#c3cfe2)}.about-container{max-width:1400px;margin:0 auto;padding:40px 20px}.about-hero{text-align:center;margin-bottom:50px;padding:60px 20px;background:linear-gradient(135deg,#1b4332,#2d6a4f);border-radius:20px;color:#fff;box-shadow:0 10px 30px #0003}.about-hero h1{font-size:3rem;margin-bottom:15px;font-weight:700}.tab-navigation{display:flex;justify-content:center;gap:10px;margin-bottom:40px;flex-wrap:wrap}.tab-btn{padding:15px 30px;background:#fff;border:2px solid #1b4332;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;color:#1b4332}.tab-btn:hover{background:#e8f5e9;transform:translateY(-2px)}.tab-btn.active{background:linear-gradient(135deg,#1b4332,#2d6a4f);color:#fff;box-shadow:0 5px 15px 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p{font-size:1rem;margin:0;opacity:.95}.disease-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:25px;margin-top:30px}.disease-card{background:#fff;border-radius:15px;padding:30px;box-shadow:0 5px 15px #0000001a;transition:all .3s ease;border:3px solid transparent}.disease-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px #00000026}.disease-card.diabetes{border-color:#4a90e2}.disease-card.heart{border-color:#e74c3c}.disease-card.kidney{border-color:#f39c12}.disease-card.parkinson{border-color:#9b59b6}.disease-card.cancer{border-color:#e91e63}.disease-icon{font-size:3rem;margin-bottom:15px}.disease-card h3{color:#1b4332;font-size:1.5rem;margin-bottom:10px}.disease-card p{color:#666;font-size:1rem;margin-bottom:15px}.accuracy-badge{display:inline-block;background:linear-gradient(135deg,#1b4332,#2d6a4f);color:#fff;padding:8px 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h3{color:#1b4332;font-size:1.8rem;margin-bottom:25px}.metric-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}.metric-card{background:linear-gradient(135deg,#e8f5e9,#c8e6c9);padding:25px;border-radius:12px;border-left:5px solid #1b4332}.metric-card h4{color:#1b4332;font-size:1.2rem;margin-bottom:10px}.metric-card p{color:#333;font-size:.95rem;line-height:1.6;margin:0}.federated-section{background:#fff;border-radius:20px;padding:40px;box-shadow:0 5px 20px #0000001a}.federated-section h2{color:#1b4332;font-size:2rem;margin-bottom:20px}.fl-explanation{background:linear-gradient(135deg,#e3f2fd,#bbdefb);padding:30px;border-radius:15px;border-left:5px solid #2196f3;margin-bottom:40px}.fl-explanation p{font-size:1.1rem;line-height:1.8;color:#333;margin:0}.fl-process{margin:50px 0}.fl-process h3{color:#1b4332;font-size:1.8rem;margin-bottom:30px;text-align:center}.process-steps{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px}.step{flex:1;min-width:200px;background:#fff;padding:25px;border-radius:15px;box-shadow:0 5px 15px #0000001a;text-align:center;border:3px solid #1b4332}.step-number{width:50px;height:50px;background:linear-gradient(135deg,#1b4332,#2d6a4f);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;margin:0 auto 15px}.step h4{color:#1b4332;font-size:1.2rem;margin-bottom:10px}.step p{color:#666;font-size:.95rem;line-height:1.6;margin:0}.step-arrow{font-size:2rem;color:#1b4332;font-weight:700}.fl-comparison{margin:50px 0}.fl-comparison h3{color:#1b4332;font-size:1.8rem;margin-bottom:30px;text-align:center}.comparison-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:30px}.comparison-card{padding:30px;border-radius:15px;box-shadow:0 5px 15px #0000001a}.comparison-card.traditional{background:linear-gradient(135deg,#ffebee,#ffcdd2);border:3px solid #e53935}.comparison-card.federated{background:linear-gradient(135deg,#e8f5e9,#c8e6c9);border:3px solid #43a047}.comparison-card h4{font-size:1.3rem;margin-bottom:20px}.comparison-card ul{list-style:none;padding:0}.comparison-card li{padding:10px 0;font-size:1rem;line-height:1.6;border-bottom:1px solid rgba(0,0,0,.1)}.comparison-card li:last-child{border-bottom:none}.technical-details{margin:50px 0}.technical-details h3{color:#1b4332;font-size:1.8rem;margin-bottom:30px;text-align:center}.tech-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:25px}.tech-card{background:linear-gradient(135deg,#fff3e0,#ffe0b2);padding:30px;border-radius:15px;border-left:5px solid #ff9800;box-shadow:0 5px 15px #0000001a}.tech-card h4{color:#1b4332;font-size:1.3rem;margin-bottom:15px}.tech-card p{color:#333;font-size:.95rem;line-height:1.6;margin:10px 0}.tech-card strong{color:#ff9800}.benefits-section{background:#fff;border-radius:20px;padding:40px;box-shadow:0 5px 20px #0000001a}.benefits-section h2{color:#1b4332;font-size:2rem;margin-bottom:30px}.benefits-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:30px;margin-bottom:50px}.benefit-card{background:linear-gradient(135deg,#f5f5f5,#e8e8e8);padding:30px;border-radius:15px;box-shadow:0 5px 15px #0000001a;transition:all .3s ease;border:3px solid transparent}.benefit-card:hover{transform:translateY(-5px);border-color:#1b4332;box-shadow:0 8px 25px #00000026}.benefit-icon{font-size:3rem;margin-bottom:15px}.benefit-card h3{color:#1b4332;font-size:1.3rem;margin-bottom:15px}.benefit-card p{color:#333;font-size:1rem;line-height:1.7;margin:0}.use-cases{margin:50px 0}.use-cases h3{color:#1b4332;font-size:1.8rem;margin-bottom:30px}.use-case-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}.use-case{background:linear-gradient(135deg,#e1f5fe,#b3e5fc);padding:25px;border-radius:12px;border-left:5px solid #0288d1}.use-case h4{color:#1b4332;font-size:1.2rem;margin-bottom:10px}.use-case p{color:#333;font-size:.95rem;line-height:1.6;margin:0}.impact-stats{margin-top:50px;padding:40px;background:linear-gradient(135deg,#f3e5f5,#e1bee7);border-radius:15px}.impact-stats h3{color:#1b4332;font-size:1.8rem;margin-bottom:30px;text-align:center}.impact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:25px}.impact-item{background:#fff;padding:25px;border-radius:12px;box-shadow:0 3px 10px #0000001a}.impact-item h4{color:#7b1fa2;font-size:1.3rem;margin-bottom:10px}.impact-item p{color:#333;font-size:.95rem;line-height:1.6;margin:0}.about-footer{margin-top:60px;padding:30px;background:linear-gradient(135deg,#1b4332,#2d6a4f);border-radius:15px;text-align:center;color:#fff}.about-footer p{margin:10px 0;font-size:1rem}.footer-note{font-size:.9rem;opacity:.9}@media(max-width:1024px){.process-steps{flex-direction:column}.step-arrow{transform:rotate(90deg);margin:10px 0}.comparison-grid{grid-template-columns:1fr}}@media(max-width:768px){.about-hero h1{font-size:2rem}.hero-subtitle{font-size:1rem}.tab-btn{padding:12px 20px;font-size:.9rem}.stats-grid{grid-template-columns:repeat(2,1fr)}.disease-cards,.benefits-grid{grid-template-columns:1fr}}@media(max-width:480px){.about-container{padding:20px 10px}.about-hero{padding:40px 15px}.stats-grid{grid-template-columns:1fr}.tab-navigation{flex-direction:column;gap:10px}.tab-btn{width:100%}}.contact-page{min-height:100vh;background:linear-gradient(135deg,#f5f7fa,#c3cfe2)}.contact-container{max-width:1400px;margin:0 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