:root{
  --text:#0b1220;
  --muted:#667085;
  --line:#e5e7eb;
  --bg:#ffffff;
  --chip:#f2f4f7;
  --chip2:#eef2f6;

  /* pro spacing + radius */
  --radius:14px;
  --radiusPill:999px;
  --shadow: 0 1px 0 rgba(16,24,40,.04);
}

html{font-size:16px}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family: system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Layout */
.container{max-width:1100px;margin:0 auto;padding:0 22px}
main{max-width:920px;margin:64px auto 120px;padding:0 22px}

/* Topbar (Meta-like, clean) */
.topbar{
  position:sticky;top:0;z-index:10;
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);
}
.topbar .container{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:12px 22px;
}
.brand{display:flex;align-items:center;gap:10px;white-space:nowrap}
.brandName{
  font-weight:800;
  letter-spacing:0.12em;
  text-transform:uppercase;
  font-size:12px;
  color:var(--text);
  text-decoration:none;
}
.brandTag{
  font-size:12px;
  color:var(--muted);
  padding:2px 8px;
  border:1px solid var(--line);
  border-radius:var(--radiusPill);
  background:#fff;
  line-height:1.6;
}
.menu{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.menu a{
  font-size:12px;
  color:var(--text);
  text-decoration:none;
  padding:7px 10px;
  border-radius:var(--radiusPill);
  border:1px solid transparent;
  background:transparent;
  opacity:.88;
  transition: background .12s ease, border-color .12s ease, opacity .12s ease;
}
.menu a[aria-current="page"]{
  opacity:1;
  background:var(--chip);
  border-color:var(--line);
  box-shadow:var(--shadow);
}
.menu a:hover{
  opacity:1;
  background:var(--chip2);
  border-color:var(--line);
}

/* Typography base */
h1,h2,h3{font-weight:700;letter-spacing:-0.02em;line-height:1.18;margin:0 0 12px}
p{margin:0 0 16px}
a{color:var(--text);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{opacity:.86}
hr{border:0;border-top:1px solid var(--line);margin:28px 0}

.muted{color:var(--muted)}
.small{font-size:13px;color:var(--muted)}

/* =========================
   HOME · Jerarquía
   ========================= */
body.page-home main{max-width:980px}
.hero{padding:26px 0 10px}
.kicker{
  font-size:12px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--muted);
  margin-bottom:10px;
}
.lead{font-size:1.02rem;line-height:1.68;margin-top:8px;margin-bottom:18px}
.ctaRow{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}

/* HOME · Entradas por material (ledger-style, sin separador colgante) */
.entryList{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:8px;
}

.entryLink{
  position:relative;
  padding:0 14px 0 0;
  border:none;
  border-radius:0;
  background:none;
  font-weight:600;
  text-decoration:none;
  color:var(--text);
}

.entryLink:not(:last-child)::after{
  content:"·";
  position:absolute;
  right:0;
  color:var(--muted);
}

.entryLink .muted{
  font-weight:500;
  color:var(--muted);
}

.hubSecondary{
  display:block;
  margin-top:10px;
  font-weight:500;
  text-decoration:none;
  color:var(--muted);
}
.hubSecondary:hover{
  text-decoration:underline;
  opacity:1;
}

.primaryCta,.secondaryCta{
  display:inline-block;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--line);
  text-decoration:none;
  font-size:13px;
  background:#fff;
  box-shadow:var(--shadow);
}
.primaryCta{background:var(--chip)}
.primaryCta:hover,.secondaryCta:hover{background:var(--chip2)}

.cards{display:grid;gap:10px;margin-top:12px}
.card{
  display:block;
  padding:14px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:#fff;
  text-decoration:none;
  box-shadow:var(--shadow);
  transition: background .12s ease;
}
.card:hover{background:var(--chip)}
.cardTitle{font-weight:700;font-size:14px;margin-bottom:4px}
.cardMeta{font-size:13px;color:var(--muted)}
.footer{border-top:1px solid var(--line);padding:18px 0}

/* =========================
   MATERIALS · Chips (Meta-like)
   ========================= */
body.page-materials main{max-width:980px}
body.page-materials h1{
  font-size:2.6rem;
  margin-top:10px;
  margin-bottom:14px;
}
.sectionTitle{
  font-size:1.1rem;
  letter-spacing:-0.01em;
  margin-top:26px;
  margin-bottom:12px;
}
.gridList{
  list-style:none;
  padding:0;
  margin:0;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.chipLink{
  display:inline-block;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  text-decoration:none;
  font-size:13px;
  color:var(--text);
  box-shadow:var(--shadow);
}
.chipLink:hover{background:var(--chip)}

/* =========================
   LAB NOTES INDEX · Cards
   (ajuste: texto más chico y menos bold)
   ========================= */
body.page-notes-index main{max-width:980px}
.notesGrid{
  margin-top:18px;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
}
@media (max-width:900px){.notesGrid{grid-template-columns:1fr}}

.noteCard{
  display:block;
  padding:16px 16px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:#fff;
  text-decoration:none;
  box-shadow:var(--shadow);
  transition: background .12s ease;
}
.noteCard:hover{background:var(--chip)}
.noteTitle{font-weight:700;font-size:13.5px;line-height:1.28;margin-bottom:6px}
.noteDesc{font-size:12.8px;color:var(--muted);line-height:1.55;margin-bottom:10px}
.noteMeta{font-size:11.5px;color:var(--muted);letter-spacing:0.06em;text-transform:uppercase}
.backRow{margin-top:22px}
.backLink{font-size:13px;color:var(--text);text-decoration:none}
.backLink:hover{text-decoration:underline}

/* =========================
   NOTE · Tipografía (más compacta, menos negritas “agresivas”)
   ========================= */
body.page-note{line-height:1.74}
body.page-note main{max-width:860px}
body.page-note p{font-size:0.98rem;line-height:1.76}
body.page-note h1{font-size:2.05rem;letter-spacing:-0.02em;margin-top:6px}
body.page-note h2{font-size:1.20rem;margin-top:26px;margin-bottom:10px}
body.page-note h3{font-size:1.05rem;margin-top:18px;margin-bottom:8px}
body.page-note ul{margin:0 0 16px;padding-left:18px}
body.page-note li{margin:6px 0;font-size:0.98rem;line-height:1.7}

/* bajar “peso” general de strong para que no grite */
body.page-note strong{font-weight:650}

/* botones simples (si los usás) */
.btn{
  display:inline-block;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--chip);
  text-decoration:none;
  font-size:13px;
  box-shadow:var(--shadow);
}
.btn:hover{background:var(--chip2)}