:root{--ink:#1a1a2e;--muted:#5b6472;--accent:#5b21b6;--accent-2:#7c3aed;--bg:#fdfdfc;--soft:#f4f2f8;--line:#e6e3ee;--radius:10px}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:17px}
.wrap{max-width:1040px;margin:0 auto;padding:0 1.25rem}
.wrap.narrow{max-width:720px}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
h1{font-size:2.4rem;line-height:1.15;letter-spacing:-.02em;font-weight:800}
h2{font-size:1.5rem;letter-spacing:-.01em;margin:2.2rem 0 .8rem;font-weight:700}
h3{font-size:1.1rem;font-weight:700;margin-bottom:.4rem}
/* header */
.site-header{position:sticky;top:0;background:rgba(253,253,252,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;font-size:1.25rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.brand span{color:var(--accent-2)}
.main-nav{display:flex;gap:1.6rem}
.main-nav a{color:var(--muted);text-decoration:none;font-weight:600;font-size:.95rem}
.main-nav a:hover{color:var(--ink)}
.main-nav a.active{color:var(--accent-2)}
.menu-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--ink)}
/* hero */
.hero{padding:5rem 0 4.5rem}
.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-2);margin-bottom:1rem}
.hero h1{max-width:640px}
.lede{font-size:1.2rem;color:var(--muted);max-width:620px;margin:1.2rem 0 1.8rem}
.cta-row{display:flex;gap:.8rem;flex-wrap:wrap}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:.7rem 1.4rem;border-radius:var(--radius);text-decoration:none;font-weight:700;font-size:.95rem;transition:background .15s}
.btn:hover{background:#4c1d95}
.btn.ghost{background:transparent;color:var(--accent);border:1.5px solid var(--accent)}
.btn.ghost:hover{background:var(--soft)}
/* sections */
.section{padding:3.2rem 0}
.section.alt{background:var(--soft)}
.section h2{margin-top:0}
.grid{display:grid;gap:1.2rem}
.grid.three{grid-template-columns:repeat(3,1fr)}
.grid.posts{grid-template-columns:repeat(2,1fr)}
.feature h3::before{content:"";display:block;width:34px;height:4px;border-radius:2px;background:var(--accent-2);margin-bottom:.7rem}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem}
.feature p{color:var(--muted);font-size:.95rem}
/* cards */
.post-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .15s,box-shadow .15s}
.post-card:hover{transform:translateY(-3px);box-shadow:0 10px 28px rgba(26,26,46,.09)}
.card-link{display:block;text-decoration:none;color:inherit}
.post-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.card-body{padding:1.2rem 1.3rem 1.4rem}
.cat{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-2)}
.post-card h3{margin:.45rem 0 .5rem;font-size:1.12rem;line-height:1.3}
.post-card p{color:var(--muted);font-size:.92rem;margin-bottom:.7rem}
time{font-size:.82rem;color:#9aa1ac}
/* article */
.article{max-width:720px}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:1rem}
.breadcrumb a{color:var(--muted)}
.meta{color:var(--muted);font-size:.9rem;margin:.8rem 0 1.6rem}
.post-hero{border-radius:var(--radius);margin-bottom:2rem}
.prose p{margin-bottom:1.15rem}
.prose .intro{font-size:1.15rem;color:var(--ink)}
.toc{background:var(--soft);border-radius:var(--radius);padding:1.1rem 1.4rem;margin:1.8rem 0}
.toc strong{font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.toc ul{list-style:none;margin-top:.5rem}
.toc a{text-decoration:none;font-weight:600;font-size:.95rem}
.toc a:hover{color:var(--accent-2)}
.contact-mail a{font-size:1.3rem;font-weight:700}
/* footer */
.site-footer{border-top:1px solid var(--line);padding:2rem 0;margin-top:2rem}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;color:var(--muted);font-size:.9rem}
.footer-inner nav{display:flex;gap:1.2rem}
.footer-inner a{color:var(--muted);text-decoration:none}
.footer-inner a:hover{color:var(--ink)}
/* responsive */
@media (max-width:820px){.grid.three,.grid.posts{grid-template-columns:1fr}.hero{padding:3.5rem 0 3rem}h1{font-size:2rem}
.menu-toggle{display:block}
.main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;padding:1rem 1.25rem;gap:.9rem}
.main-nav.open{display:flex}}