.site-header{position:fixed;top:0;width:100%;background-color:var(--header-bg);padding:1rem 2rem;box-shadow:0 2px 4px var(--header-shadow);z-index:1000;transition:background-color .3s ease,box-shadow .3s ease}.header-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap}.burger{display:none;font-size:1.5rem;background:none;border:none;cursor:pointer;margin-right:1rem;color:var(--text-color)}.nav ul{display:flex;list-style:none;gap:2rem;padding:0;margin:0}.nav a{color:var(--text-color);font-weight:500;transition:color .2s ease}.nav a:hover{color:var(--primary-color)}@media (max-width: 768px){.burger{display:block}.nav{width:100%;display:none}.nav.open{display:block}.nav ul{flex-direction:column;align-items:flex-start;gap:1rem;margin-top:1rem;background-color:var(--header-bg);padding:1rem;width:100%}}@media (max-width: 768px){.header-inner{align-items:flex-start}.language-selector{margin-left:auto;margin-top:.5rem}}.language-selector button{background:none;border:none;font-size:.9rem;cursor:pointer;transition:transform .2s ease,opacity .2s ease;opacity:.7;margin:0;padding:2px 4px}.language-selector button:hover{transform:scale(1.1);opacity:1}.theme-toggle{background:none;border:1px solid var(--border-color);border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.2rem;transition:all .3s ease;color:var(--text-color);background-color:var(--card-bg);box-shadow:0 2px 4px var(--shadow-color)}.theme-toggle:hover{background-color:var(--bg-alt);transform:scale(1.05)}.about{min-height:100vh;display:flex;justify-content:center;align-items:center;padding:4rem 2rem 2rem;background-color:var(--bg-color);transition:background-color .3s ease}.about-container{display:flex;flex-direction:row;gap:3rem;align-items:center;max-width:1000px;flex-wrap:wrap}.about-text{flex:1;min-width:300px}.about-text 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var(--primary-color);padding-left:.5rem;margin-bottom:1rem}.certifications-section{all:unset;display:block;padding:3rem 1rem;max-width:1000px;margin:0 auto}.cert-title{text-align:center!important;border:none!important;margin:0 auto 2rem;display:block}.certifications-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:2rem}.cert-card{background:var(--card-bg);border-radius:16px;overflow:hidden;box-shadow:0 8px 24px var(--shadow-color);text-align:center;display:flex;flex-direction:column;justify-content:space-between;padding:1rem;transition:transform .2s ease,background-color .3s ease}.cert-card:hover{transform:translateY(-4px)}.cert-image{width:100%;height:auto;aspect-ratio:4 / 3;object-fit:cover;border-radius:8px}.cert-name{font-size:1rem;font-weight:500;color:var(--text-color);margin:1rem 0 .5rem}.cert-button{background:var(--primary-color);color:#fff;padding:.4rem .9rem;font-size:.85rem;border:none;border-radius:6px;cursor:pointer;transition:background .2s 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p{margin:0;font-size:.95rem;font-weight:500}.notification-close{background:none;border:none;color:var(--secondary-color);font-size:1.5rem;cursor:pointer;padding:0;line-height:1}.notification-close:hover{color:var(--text-color)}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@media (max-width: 768px){.notification{bottom:1rem;right:1rem;left:1rem;width:auto}}.admin-login-container{display:flex;align-items:center;justify-content:center;min-height:80vh}.admin-card{background:var(--card-bg);padding:2rem;border-radius:12px;box-shadow:0 4px 12px var(--shadow-color);text-align:center;width:100%;max-width:400px;border:1px solid var(--border-color)}.admin-input{width:100%;padding:.8rem;margin:.5rem 0;border:1px solid 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