:root{--bg:#fff;--bg-alt:#f4f6fb;--text:#1a2233;--muted:#5b6577;--brand:#2f6bff;--brand-dark:#1f4fd1;--border:#e3e7f0;--radius:12px;--maxw:1080px;color:var(--text);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#0f1420;--bg-alt:#161d2e;--text:#e8ecf5;--muted:#9aa6bd;--brand:#5c8bff;--brand-dark:#3f6de0;--border:#26304a}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;line-height:1.6}a{color:inherit;text-decoration:none}.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}.site{flex-direction:column;min-height:100vh;display:flex}.site-main{flex:1}.site-header{border-bottom:1px solid var(--border);background:color-mix(in srgb, var(--bg) 88%, transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:10;position:sticky;top:0}.header-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;min-height:64px;display:flex}.brand{align-items:center;gap:10px;font-size:1.05rem;font-weight:700;display:flex}.brand-mark{background:var(--brand);color:#fff;letter-spacing:.5px;border-radius:8px;place-items:center;width:32px;height:32px;font-size:.8rem;display:inline-grid}.nav{flex-wrap:wrap;gap:4px;display:flex}.nav-link{color:var(--muted);border-radius:8px;padding:8px 12px;font-size:.95rem;font-weight:500}.nav-link:hover{color:var(--text);background:var(--bg-alt)}.nav-link.active{color:var(--brand);background:color-mix(in srgb, var(--brand) 12%, transparent)}.hero{background:var(--bg-alt);border-bottom:1px solid var(--border);padding:72px 0 48px}.eyebrow{text-transform:uppercase;letter-spacing:1.5px;color:var(--brand);margin:0 0 12px;font-size:.75rem;font-weight:700}h1{margin:0 0 16px;font-size:clamp(1.9rem,4vw,2.8rem);line-height:1.2}h2{margin:0 0 20px;font-size:clamp(1.4rem,3vw,1.9rem)}.lead{color:var(--muted);max-width:60ch;font-size:1.1rem}.cta-row{flex-wrap:wrap;gap:12px;margin-top:24px;display:flex}.btn{cursor:pointer;border:1px solid #0000;border-radius:10px;padding:11px 20px;font-size:.95rem;font-weight:600;transition:background .15s,border-color .15s;display:inline-block}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark)}.btn-ghost{border-color:var(--border);color:var(--text)}.btn-ghost:hover{background:var(--bg-alt)}.section{padding:56px 0}.section-alt{background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;display:grid}.card{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);padding:22px}.card h3{margin:0 0 8px}.card p{color:var(--muted);margin:0}.tag{color:var(--brand);font-size:.85rem;font-weight:600;margin:0 0 8px!important}.band{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;display:flex}.muted{color:var(--muted)}.prose{max-width:68ch}.prose h2{margin-top:32px}.prose ul{padding-left:20px}.prose li{margin-bottom:6px}.post-list{flex-direction:column;gap:16px;margin-top:8px;display:flex}.post{border:1px solid var(--border);border-radius:var(--radius);padding:22px}.post h3{margin:0 0 8px}.post h3 a{color:var(--brand)}.post h3 a:hover{text-decoration:underline}.material-group{margin-top:36px}.material-group h2{border-bottom:1px solid var(--border);margin-bottom:14px;padding-bottom:6px}.btn-sm{margin-top:4px;padding:7px 14px;font-size:.85rem}.book-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px;display:grid}.book-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);gap:16px;padding:16px;display:flex}.book-cover{background:var(--bg-alt);border:1px solid var(--border);border-radius:8px;flex:0 0 90px;place-items:center;height:126px;display:grid;overflow:hidden}.book-cover img{object-fit:cover;width:100%;height:100%}.book-cover-fallback{letter-spacing:1px;color:var(--muted);font-size:.8rem;font-weight:700}.book-body{flex-direction:column;gap:6px;display:flex}.book-body h3{margin:0;font-size:1.02rem}.book-body h3 a{color:var(--brand)}.book-body p{color:var(--muted);margin:0;font-size:.92rem}.video-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;display:grid}.video-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);overflow:hidden}.video-frame{aspect-ratio:16/9;background:#000;width:100%;position:relative}.video-frame iframe{border:0;width:100%;height:100%;position:absolute;inset:0}.video-frame-fallback{color:#fff;place-items:center;font-size:.9rem;display:grid;position:absolute;inset:0}.video-body{flex-direction:column;gap:6px;padding:16px;display:flex}.video-body h3{margin:0;font-size:1.02rem}.video-body p{color:var(--muted);margin:0;font-size:.92rem}.home-section-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:16px;display:flex}.home-section-head h2{margin:0}.see-all{color:var(--brand);white-space:nowrap;font-size:.9rem;font-weight:600}.see-all:hover{text-decoration:underline}.home-section-head+.post-list,.home-section-head+.book-grid,.home-section-head+.video-thumb-grid{margin-top:20px}.video-thumb-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;display:grid}.video-thumb{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);flex-direction:column;gap:6px;display:flex;overflow:hidden}.video-thumb:hover{border-color:var(--brand)}.video-thumb-img{aspect-ratio:16/9;background:#000;display:block;position:relative}.video-thumb-img img{object-fit:cover;width:100%;height:100%;display:block}.video-thumb-play{color:#fff;background:#0009;border-radius:50%;place-items:center;width:46px;height:46px;margin:auto;padding-left:3px;font-size:1rem;display:grid;position:absolute;inset:0}.video-thumb-title{color:var(--text);padding:0 14px;font-size:.95rem;font-weight:600}.video-thumb-summary{color:var(--muted);padding:0 14px 14px;font-size:.88rem}.post p:last-child{color:var(--muted);margin:0}.form{flex-direction:column;gap:16px;margin:24px 0;display:flex}.form label{flex-direction:column;gap:6px;font-size:.9rem;font-weight:600;display:flex}.form input,.form textarea{font:inherit;border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:8px;padding:10px 12px}.form input:focus,.form textarea:focus{outline:2px solid var(--brand);outline-offset:1px}.notice{background:color-mix(in srgb, var(--brand) 12%, transparent);color:var(--text);border-radius:10px;padding:14px 16px}.site-footer{border-top:1px solid var(--border);background:var(--bg-alt);padding:28px 0}.footer-inner p{margin:4px 0;font-size:.9rem}