:root{--bg: #0e1014;--surface: #161a22;--surface-elevated: #1f2530;--text-primary: #e9eaec;--text-secondary: #9ba2ae;--accent: #c8a86a;--accent-muted: #8b764a;--tier-1: #6bb99a;--tier-2: #a0c4db;--tier-3: #d4b86a;--tier-4: #d4806a;--font-sans: ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", sans-serif;--font-serif: ui-serif, "Iowan Old Style", "Apple Garamond", serif}*{box-sizing:border-box;margin:0;padding:0}html{color-scheme:dark}body{background:var(--bg);color:var(--text-primary);font-family:var(--font-sans);font-size:17px;line-height:1.6;max-width:760px;margin:0 auto;padding:32px 20px}h1,h2,h3{font-family:var(--font-serif);font-weight:400;letter-spacing:-.01em}h1{font-size:2rem;margin-bottom:.5rem}h2{font-size:1.4rem;margin:2rem 0 .6rem}h3{font-size:1.15rem;margin:1.4rem 0 .4rem}p{margin-bottom:.9rem;color:var(--text-primary)}.muted{color:var(--text-secondary)}.small{font-size:.85rem;color:var(--text-secondary)}a{color:var(--accent);text-decoration:none;border-bottom:1px solid var(--accent-muted)}a:hover{color:#fff;border-bottom-color:var(--accent)}.banner{border-left:3px solid var(--accent);background:var(--surface);padding:18px 20px;margin:20px 0 32px;border-radius:4px}.banner blockquote{font-size:1.1rem;font-family:var(--font-serif)}.banner cite{display:block;margin-top:6px;font-size:.85rem;color:var(--text-secondary);font-style:normal}.lecture-list{list-style:none}.lecture-card{display:block;padding:16px 18px;margin:8px 0;background:var(--surface);border-radius:6px;border:none}.lecture-card:hover{background:var(--surface-elevated);border-bottom:none}.lecture-card .lnum{color:var(--accent);font-weight:500;margin-right:.6rem}.lecture-card .meta{font-size:.85rem;color:var(--text-secondary);margin-top:6px}video,audio{width:100%;max-width:100%}footer{margin-top:80px;padding-top:24px;border-top:1px solid var(--surface-elevated);color:var(--text-secondary);font-size:.85rem}.tier{display:flex;gap:14px;padding:14px;border-radius:6px;margin:8px 0;background:var(--surface)}.tier .badge{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-weight:500;flex-shrink:0}.tier-1 .badge{background:#6bb99a40;color:var(--tier-1)}.tier-2 .badge{background:#a0c4db40;color:var(--tier-2)}.tier-3 .badge{background:#d4b86a40;color:var(--tier-3)}.tier-4 .badge{background:#d4806a40;color:var(--tier-4)}