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button{background-color:var(--primary-blue);color:var(--white);border:none;border-radius:50%;width:3rem;height:3rem;font-size:1.25rem;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px #0003;transition:all .3s ease;opacity:.9}.scroll-to-top button:hover{background-color:var(--primary-blue-dark);transform:translateY(-3px);opacity:1}@media(max-width:768px){.scroll-to-top{bottom:1.5rem;right:1.5rem}}.App{min-height:100vh;display:flex;flex-direction:column}main{flex:1}section{padding:80px 20px;max-width:1200px;margin:0 auto;width:100%}@media(max-width:768px){section{padding:60px 20px}}section[id]{scroll-margin-top:80px}*{margin:0;padding:0;box-sizing:border-box}:root{--primary-blue: #0050FF;--primary-blue-dark: #003CC0;--primary-blue-light: #4D85FF;--gray-dark: #111111;--gray-medium: #666666;--gray-light: #AAAAAA;--gray-lighter: #E5E5E5;--white: #ffffff;--background: #ffffff;--text-primary: #111111;--text-secondary: #555555;--font-heading: "Space 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