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15px 35px rgba(1,179,148,.4)}.btn-secondary{background:0 0;color:var(--primary-color);border:2px solid var(--primary-color)}.btn-secondary:hover{background:var(--primary-color);color:var(--white);transform:translateY(-3px)}.features{padding:2rem 0;position:relative}.error-logo,.section-header{text-align:center;margin-bottom:2rem}.section-title{font-size:clamp(2.5rem, 5vw, 4rem);font-weight:800;margin-bottom:1.5rem;color:var(--white)}.section-subtitle{font-size:1.3rem;color:var(--text-muted);max-width:600px;margin:0 auto}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:2.5rem}.feature-card{padding:1.5rem;position:relative}.feature-icon{width:80px;height:80px;margin:0 auto 1rem;background:linear-gradient(135deg,var(--primary-color),var(--primary-dark));border-radius:50%;display:flex;justify-content:center;font-size:2rem;color:var(--white);z-index:2;box-shadow:0 10px 30px 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2.5rem;font-size:1.2rem;background:linear-gradient(135deg,#f96854,#ff6b35)}.support-btn:hover{background:linear-gradient(135deg,#ff6b35,#f96854);transform:translateY(-3px);box-shadow:0 15px 35px rgba(249,104,84,.4)}.support-btn i,.support-btn svg{font-size:1.3rem;margin-right:.8rem;vertical-align:middle}.support-note{font-size:.95rem;color:var(--text-light);font-style:italic;margin-top:1rem}footer{padding:2rem 0;border-top:1px solid rgba(1,179,148,.2)}.footer-bottom{max-width:600px;margin:0 auto}.footer-links{display:flex;justify-content:center;align-items:center;gap:1rem;margin-bottom:.5rem;font-size:.9rem}.footer-links a{transition:color .3s}.footer-bottom p{font-size:.85rem;line-height:1.5}.back-to-top{position:fixed;bottom:30px;right:30px;width:60px;height:60px;background:linear-gradient(135deg,var(--primary-color),var(--primary-dark));border-radius:50%;cursor:pointer;justify-content:center;font-size:1.5rem;color:var(--white);box-shadow:0 8px 25px rgba(1,179,148,.4);opacity:0;visibility:hidden;transform:translateY(100px);z-index:1000}.back-to-top::before,.floating-elements{width:100%;height:100%;position:absolute}.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}.back-to-top:hover{transform:translateY(-5px) scale(1.1);box-shadow:0 15px 35px rgba(1,179,148,.6);background:linear-gradient(135deg,var(--primary-dark),var(--primary-color))}.back-to-top:active{transform:translateY(-2px) scale(1.05)}.back-to-top::before{content:'';top:0;left:0;border-radius:50%;background:linear-gradient(135deg,rgba(255,255,255,.2),transparent);opacity:0;transition:opacity .3s}.back-to-top:hover::before{opacity:1;animation:1.5s ease-out infinite pulse-ring}@keyframes pulse-ring{0%{transform:scale(1);opacity:.3}50%{transform:scale(1.2);opacity:.1}100%{transform:scale(1.4);opacity:0}}.error-container{max-width:600px;padding:2rem}.error-logo img{height:200px;animation:2s ease-in-out infinite pulse}.error-code{font-size:clamp(4rem, 15vw, 8rem);font-weight:800;background:linear-gradient(135deg,var(--white),var(--primary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:1rem}.floating-elements::after,.floating-elements::before,.home-button{background:linear-gradient(135deg,var(--primary-color),var(--primary-dark))}.error-title{font-size:clamp(1.5rem, 4vw, 2.5rem);font-weight:700;color:var(--white);margin-bottom:1rem}.error-message{font-size:1.2rem;color:var(--text-muted);margin-bottom:2rem;line-height:1.6}.home-button{display:inline-flex;align-items:center;gap:.8rem;color:var(--white);padding:1rem 2rem;border-radius:50px;font-weight:600;font-size:1.1rem;transition:.3s;box-shadow:0 8px 25px rgba(1,179,148,.3)}.floating-elements{overflow:hidden;z-index:-1}.floating-elements::after,.floating-elements::before{content:'';position:absolute;width:200px;height:200px;border-radius:50%;opacity:.1;animation:6s ease-in-out infinite 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pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.05)}}.cursor-trail{position:fixed;width:20px;height:20px;background:radial-gradient(circle,var(--primary-color),transparent);z-index:9999;transition:transform .1s}.ripple{position:absolute;background:rgba(1,179,148,.3);transform:scale(0);animation:.6s linear ripple-animation}@keyframes ripple-animation{to{transform:scale(4);opacity:0}}