:root{color-scheme:light dark}
*{box-sizing:border-box} body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,"Noto Sans",sans-serif;line-height:1.6}
a{color:inherit}
.wrap{max-width:1100px;margin:0 auto;padding:24px}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700}
.small{opacity:.8;font-size:14px}
.hero{padding:54px 0;border-top:1px solid rgba(127,127,127,.25);border-bottom:1px solid rgba(127,127,127,.25)}
.kicker{opacity:.8;font-size:14px;letter-spacing:.08em;text-transform:uppercase}
.h1{font-size:42px;line-height:1.1;margin:14px 0 10px}
.sub{font-size:18px;opacity:.9;max-width:860px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:26px 0}
.card{border:1px solid rgba(127,127,127,.25);border-radius:16px;padding:18px;background:rgba(127,127,127,.06)}
.card h3{margin:0 0 8px;font-size:16px}
.card p{margin:0;opacity:.9}
.section{padding:28px 0}
.h2{font-size:22px;margin:0 0 14px}
.btnrow{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:12px;text-decoration:none;border:1px solid rgba(127,127,127,.35);background:rgba(127,127,127,.08)}
.btn:hover{background:rgba(127,127,127,.14)}
.footer{padding:22px 0;border-top:1px solid rgba(127,127,127,.25);opacity:.85;font-size:14px}
@media (max-width:900px){.grid3{grid-template-columns:1fr}.h1{font-size:34px}}

/* --- Simple grid helpers (used on index Core Principles) --- */
.grid{
  display:grid;
  grid-template-columns: 1fr;
  gap:14px;
}
@media (min-width: 900px){
  .grid{
    grid-template-columns: repeat(3, 1fr);
  }
}