.nav{position:sticky;top:0;background:#0e1116;border-bottom:1px solid #242a38}.nav-inner{max-width:1200px;margin:0 auto;padding:.75rem 1.5rem;display:flex;justify-content:space-between}.nav-title{font-weight:600;color:#e6e8eb}.nav-links a{margin-left:1.25rem;padding:.35rem .6rem;border-radius:6px;color:#aeb4c0;text-decoration:none}.nav-links a.active{background:#4ea1ff1f;color:#4ea1ff}.content{max-width:1200px;margin:0 auto;padding:2rem 1.5rem}.nav .brand{display:flex;align-items:center;gap:.6rem}.nav .brand img{width:22px;height:22px;border-radius:4px}:root{--bg-root: #0e1116;--bg-panel: #131720;--bg-hover: #1a1f2b;--border-subtle: #242a38;--text-primary: #e6e8eb;--text-secondary: #aeb4c0;--text-tertiary: #7f8796;--accent: #4ea1ff}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg-root);color:var(--text-primary);font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Ubuntu,sans-serif;line-height:1.6}h1,h2,h3{font-weight:600;letter-spacing:.2px;color:var(--text-primary)}p{color:var(--text-secondary);max-width:75ch}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}table{width:100%;border-collapse:collapse}th{text-align:left;font-weight:500;color:var(--text-secondary);padding:.5rem;border-bottom:1px solid var(--border-subtle)}td{padding:.5rem;border-bottom:1px solid var(--border-subtle)}tr:hover td{background:var(--bg-hover)}section{margin:2rem 0}.math{margin:1rem 0;font-size:1.05rem}.math-inline{font-family:serif}.section-intro{color:var(--text-tertiary);margin-bottom:1rem}.closing-note{margin-top:3rem;color:var(--text-tertiary)}ul{margin-left:1.25rem;color:var(--text-secondary)}li{margin:.4rem 0}.topbar{display:flex;align-items:center;justify-content:space-between;padding:.5rem 1rem;border-bottom:1px solid var(--border-subtle);background:var(--bg-panel)}.brand{display:flex;align-items:center;gap:.6rem;font-weight:600;color:var(--text-primary)}.brand img{width:24px;height:24px;border-radius:4px}.brand span{font-size:.95rem}.topbar nav a{margin-left:1rem;color:var(--text-secondary)}.topbar nav a:hover{color:var(--text-primary)}.brand img{filter:grayscale(100%);transition:filter .15s ease}.brand:hover img{filter:none}