:root{--background-light:#fdfdfd;--text-light:#3a3a3a;--primary-light:#007bff;--background-dark:#2a2a2a;--text-dark:#fdfdfd;--primary-dark:#007bff}@media(prefers-color-scheme:light){body{background-color:var(--background-light);color:var(--text-light)}a{color:var(--primary-light)}}@media(prefers-color-scheme:dark){body{background-color:var(--background-dark);color:var(--text-dark)}a{color:var(--primary-dark)}}body{max-width:75ch;font-family:sans-serif;margin:0;line-height:1.6;min-height:100vh;display:flex;flex-direction:column;margin:0 auto}.container{padding:0 2rem}main{}p{margin-bottom:1.25em}header{}.header-container{margin:0 auto;padding:0 2rem;display:flex;justify-content:space-between;align-items:center}.logo a{font-weight:700;font-size:1.5rem;text-decoration:none;color:inherit}nav ul{list-style:none;margin:0;padding:0;display:flex}nav li{margin-left:1.5rem}@media(max-width:600px){.container{padding:0 1rem 1rem}header{flex-direction:column;align-items:flex-start;margin-bottom:1rem}nav ul{flex-direction:column;margin-top:1rem}nav li{margin-left:0;margin-bottom:.5rem}}.collapsible-section{margin-bottom:1rem}.collapsible-section summary{cursor:pointer;font-weight:700;font-size:1.2rem;padding:.5rem 0;user-select:none;list-style:none;display:flex;align-items:center}.collapsible-section summary::-webkit-details-marker{display:none}.collapsible-section summary::before{content:'▼';display:inline-block;margin-right:.5rem;transition:transform .2s ease;font-size:.8em}.collapsible-section:not([open]) summary::before{transform:rotate(-90deg)}.collapsible-section summary a{text-decoration:none;color:inherit}.collapsible-section summary a:hover{text-decoration:underline}.collapsible-section ul{margin-top:.5rem;margin-bottom:0;padding-left:1.5rem}.section-link{margin-bottom:.5rem}.section-link a{font-size:1.1rem;text-decoration:none}.section-link a:hover{text-decoration:underline}