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a:hover::after{width:100%}.theme-toggle{width:45px;height:45px;border-radius:50%;background:var(--bg-secondary);border:2px solid var(--border-color);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.3s;box-shadow:0 2px 8px var(--shadow-color)}.theme-toggle:hover{transform:scale(1.1);box-shadow:0 4px 12px var(--shadow-color)}.theme-toggle svg{color:var(--text-dark);transition:.3s}.theme-toggle .sun-icon{display:block;position:absolute}.theme-toggle .moon-icon{display:none;position:absolute}body.dark-mode .theme-toggle .sun-icon{display:none}body.dark-mode .theme-toggle .moon-icon{display:block}.header{background:linear-gradient(135deg,var(--bg-primary) 0,var(--bg-secondary) 100%);color:var(--text-dark);padding:90px 0 60px;border-bottom:1px solid var(--border-color);transition:background .3s}.profile-image-back,.profile-image-front{position:absolute;width:100%;height:100%;border-radius:50%;backface-visibility:hidden;display:flex;align-items:center;justify-content:center;border:4px solid var(--border-color);box-shadow:0 8px 20px var(--shadow-color);transition:border-color .3s,box-shadow .3s}.profile-image-front{background:var(--bg-primary)}.section{border-bottom:2px solid var(--border-color);padding-bottom:32px;transition:border-color .3s}.footer{background:var(--bg-secondary);padding:28px 0;border-top:1px solid var(--border-color);transition:background .3s,border-color .3s}@media (max-width:768px){.navbar{padding:0 15px;height:60px}.hamburger{display:flex}.nav-links{position:fixed;top:0;right:-100%;width:280px;height:100vh;background:var(--bg-primary);backdrop-filter:blur(10px);border-left:1px solid var(--border-color);flex-direction:column;gap:0;padding:80px 0 20px;transition:right .5s cubic-bezier(.68, -.55, .27, 1.55);box-shadow:-8px 0 24px rgba(0,0,0,.15);overflow-y:auto}.nav-links.active{right:0}.nav-links a{width:100%;padding:18px 30px;font-size:16px;font-weight:500;border-bottom:1px solid var(--border-color);transform:translateX(100px);opacity:0;transition:.3s}.nav-links.active a{transform:translateX(0);opacity:1}.nav-links.active a:first-child{transition-delay:0.1s}.nav-links.active a:nth-child(2){transition-delay:0.2s}.nav-links.active a:nth-child(3){transition-delay:0.3s}.nav-links a::after{display:none}.nav-links a:hover{background:var(--bg-secondary);padding-left:35px}.theme-toggle{width:40px;height:40px}.header{padding-top:80px}.projects-carousel-container{gap:8px}.carousel-btn{width:36px;height:36px}.carousel-btn i{font-size:14px}.project-item{min-height:auto;padding:16px}.project-item h3{font-size:16px}.view-more-btn{padding:10px 20px;font-size:14px}.certifications-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}.cert-card{padding:16px 12px;min-height:140px}.cert-icon{width:40px;height:40px;font-size:20px;margin-bottom:10px}.cert-card h4{font-size:12px;min-height:32px}.cert-issuer{font-size:10px}.cert-link{width:24px;height:24px;opacity:1;transform:scale(1)}}