:root{--color-bg-main: #f5fbf9;--color-bg-dark: #1c2143;--color-bg-medium: #2f5972;--color-accent: #5dcad1;--color-accent-soft: #f3cd74;--color-text-main: #1c2143;--color-text-muted: #4f5b6a;--color-white: #ffffff;--radius-md: 12px;--radius-lg: 20px;--shadow-soft: 0 10px 25px rgba(0, 0, 0, .08)}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Roboto,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background-color:var(--color-bg-main);color:var(--color-text-main);line-height:1.6}.container{width:min(1100px,100% - 2.5rem);margin-inline:auto}.section{padding:4rem 0;background-color:var(--color-bg-main)}.section-light{padding:4rem 0;background-color:#fff}.section h2{font-family:Poppins,system-ui,sans-serif;font-size:2rem;margin-bottom:1.5rem}.section-intro{max-width:650px;color:var(--color-text-muted)}.site-header{position:sticky;top:0;z-index:20;background-color:#1c2143f5;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:var(--color-white)}.header-content{display:flex;align-items:center;justify-content:space-between;height:64px}.logo{font-family:Poppins,system-ui,sans-serif;font-weight:700;color:var(--color-white);text-decoration:none;font-size:1.2rem}.logo span{color:var(--color-accent)}.main-nav{display:flex}.main-nav ul{display:flex;gap:2rem;list-style:none;margin:0;padding:0}.main-nav a{color:var(--color-white);text-decoration:none;font-size:.95rem;transition:color .2s ease,border-color .2s ease;border-bottom:2px solid transparent;padding-bottom:.1rem}.main-nav a:hover{color:var(--color-accent);border-color:var(--color-accent-soft)}.nav-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:inherit;padding:.5rem}.lang-switcher{display:flex;align-items:center;gap:.4rem;margin-right:1rem;font-size:.85rem}.lang-switcher .lang-link,.lang-switcher .lang-current{display:inline-flex;align-items:center;gap:.2rem;padding:.1rem .4rem;border-radius:999px;border:1px solid transparent;min-width:fit-content}.lang-switcher .lang-link{color:var(--color-white);text-decoration:none;opacity:.8;transition:opacity .2s ease,border-color .2s ease,background .2s ease}.lang-switcher .lang-link:hover{opacity:1;border-color:var(--color-accent-soft);background-color:#00000026}.lang-switcher .lang-current{opacity:1;font-weight:600;background-color:transparent;border:1px solid transparent;transition:background-color .2s ease,border-color .2s ease}.lang-switcher .lang-current.active{background-color:#5dcad133;border:1px solid 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solid rgba(93,202,209,.2)}.main-nav.active{max-height:500px}.main-nav ul{flex-direction:column;gap:0;padding:1rem 0}.main-nav li{padding:.75rem 1rem;border-bottom:1px solid rgba(255,255,255,.08)}.main-nav li:last-child{border-bottom:none}.main-nav a{color:var(--color-white);font-size:.95rem}.main-nav a:hover{color:var(--color-accent-soft)}body.nav-open .main-nav{transform:translateY(0);opacity:1;pointer-events:auto}}@media(max-width:480px){.hero-actions{flex-direction:column;align-items:flex-start}.projects-grid{grid-template-columns:1fr}.cert-card{padding:1.2rem 1.1rem}}.project-slider{margin-top:1rem;display:flex;gap:1rem;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;-ms-overflow-style:none;scrollbar-width:none}.project-slider::-webkit-scrollbar{display:none}.project-slide{flex:0 0 100%;scroll-snap-align:start}.project-slide img{width:100%;height:auto;display:block;border-radius:.75rem}.project-hint{margin-top:.75rem;font-size:.85rem;opacity:.7}