:root{--oxford-blue: #002147;--text-primary: #1a1a1a;--text-secondary: #4a4a4a;--bg-primary: #ffffff;--bg-secondary: #f5f7fa;--accent: #002147;--font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{text-decoration:none;color:inherit;transition:color .2s ease}ul{list-style:none}h1,h2,h3,h4,h5,h6{color:var(--oxford-blue);font-weight:700;line-height:1.2}.container{max-width:896px;margin:0 auto;padding:0 2rem}.text-center{text-align:center}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-4{margin-top:2rem}.mb-4{margin-bottom:2rem}.btn{display:inline-block;padding:.75rem 1.5rem;background-color:var(--oxford-blue);color:#fff;border-radius:4px;font-weight:500;border:none;cursor:pointer}.btn:hover{opacity:.9}@media(max-width:1280px){.toc-container{display:none!important}}