:root{
  --brand-1:#00d07e;
  --brand-2:#00b8c8;
  --ink:#0b1220;
  --muted:#6b7280;
  --border:#e6ebf2;
  --bg:#ffffff;
  --bg-soft:#f4f7fb;
  --link:#009e8f;
  --ring:#e2e8f0;
  --radius-btn:999px; /* unificado */
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(1400px 900px at 100% -10%, rgba(0,184,200,.12) 0%, rgba(255,255,255,0) 60%),
    radial-gradient(1200px 800px at -10% 20%, rgba(0,208,126,.10) 0%, rgba(255,255,255,0) 55%),
    var(--bg-soft);
}
.container{max-width:1100px;margin:0 auto;padding:0 24px}
/* HEADER — centered */
.site-header{
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--ring);
  position:sticky;top:0;z-index:50
}
.site-header .wrap{display:flex;align-items:center;justify-content:center;height:76px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);user-select:none}
.brand img{width:40px;height:40px;display:block;border-radius:12px;box-shadow:0 1px 0 rgba(0,0,0,.03)}
.brand .name{font-weight:800;letter-spacing:.2px;font-size:18px}
/* PAGE */
.ppage{padding:44px 0 72px}
.card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:24px;
  margin:0 auto;
  max-width:980px;
  box-shadow:0 24px 50px rgba(2,8,23,.07), 0 2px 10px rgba(2,8,23,.04);
  overflow:hidden;
}
.hero{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:34px 32px 18px;
  border-bottom:1px solid var(--border);
  background:conic-gradient(from 180deg at 0% 0%, #fff 0%, #f6fbff 18%, #ffffff 38%);
}
.hero h1{margin:0;font-size:34px;letter-spacing:.2px}
.hero .meta{color:var(--muted);font-size:14px}
/* BUTTONS — unified */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 14px;border-radius:var(--radius-btn);font-weight:600;text-decoration:none;
  border:1px solid var(--ring);background:#fff;color:var(--link);}
.btn:hover{border-color:var(--link);box-shadow:0 1px 0 rgba(0,0,0,.04)}
.btn--brand{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;border-color:transparent}
.btn--ghost{background:#fff;color:var(--link);}
.btn--sm{padding:7px 12px;font-size:14px}
/* TOC — symmetric grid */
.toc{padding:22px 32px;border-bottom:1px solid var(--border)}
.toc h2{margin:0 0 12px;font-size:18px;text-align:center}
.toc ol{display:grid;grid-template-columns:repeat(3,minmax(200px,1fr));gap:12px 16px;margin:0 auto;max-width:860px;padding:0;list-style:none}
.toc a{display:block}
@media (max-width:900px){.toc ol{grid-template-columns:repeat(2,minmax(200px,1fr))}}
@media (max-width:600px){.toc ol{grid-template-columns:1fr}}
/* CONTENT */
.content{padding:18px 32px 36px}
.content section{padding:24px 0;border-bottom:1px solid var(--border)}
.content section:last-of-type{border-bottom:none}
h2{font-size:22px;margin:0 0 12px}
h3{font-size:17px;margin:14px 0 8px}
p{margin:10px 0}
ul{margin:10px 0 10px 22px}
.note{background:#eefcf7;border-left:4px solid var(--brand-1);padding:12px 14px;border-radius:10px;margin:12px 0;color:#08372c}
.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,'DejaVu Sans Mono',monospace;background:#eef2f7;padding:2px 6px;border-radius:6px;border:1px solid #e5e9ef}
.backtop{margin-top:8px}
/* FOOTER — centered */
.site-footer{background:#0a0f12;color:#c9d2df;padding:40px 0;margin-top:10px}
.site-footer .grid{display:grid;grid-template-columns:1fr;gap:16px;justify-items:center;text-align:center}
.site-footer .brand{display:flex;align-items:center;gap:10px;color:#eaf2f9}
.site-footer .brand img{width:34px;height:34px;border-radius:10px}
.site-footer .brand .name{color:#fff;font-weight:800}
.legal{font-size:13px;color:#94a3b8}