:root {
  --bg: #0f1419;
  --surface: #1a222d;
  --surface2: #243041;
  --text: #e8eef6;
  --muted: #9aabbf;
  --accent: #3db8a8;
  --accent2: #6b8cff;
  --warn: #f0c674;
  --danger: #e07a7a;
  --radius: 14px;
  --max: 720px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent); }
img { max-width: 100%; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 1.25rem 1.1rem 5rem; }
.site-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem 1.1rem; border-bottom: 1px solid #2a3544;
  position: sticky; top: 0; background: rgba(15,20,25,.92); backdrop-filter: blur(8px); z-index: 20;
}
.logo { font-weight: 700; color: var(--text); text-decoration: none; font-size: .95rem; }
.nav a { color: var(--muted); text-decoration: none; margin-left: 1rem; font-size: .9rem; }
.nav a:hover { color: var(--text); }
.badge {
  display: inline-block; font-size: .72rem; letter-spacing: .04em; text-transform: uppercase;
  background: var(--surface2); color: var(--accent); padding: .35rem .65rem; border-radius: 999px; margin-bottom: .75rem;
}
h1 { font-size: clamp(1.6rem, 4.5vw, 2.15rem); line-height: 1.2; margin: 0 0 1rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 .75rem; }
h3 { font-size: 1.05rem; margin: 1.25rem 0 .5rem; }
.lead { font-size: 1.08rem; color: var(--muted); margin-bottom: 1.5rem; }
.card {
  background: var(--surface); border: 1px solid #2a3544; border-radius: var(--radius);
  padding: 1.15rem 1.2rem; margin: 1rem 0;
}
.card.soft { background: linear-gradient(145deg, #1a2a32, #1a222d); border-color: #2e4a4a; }
.list { padding-left: 1.15rem; color: var(--muted); }
.list li { margin: .45rem 0; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  background: var(--accent); color: #062a24; font-weight: 700; text-decoration: none;
  padding: .9rem 1.25rem; border-radius: 999px; border: none; cursor: pointer; font-size: 1rem;
}
.btn:hover { filter: brightness(1.08); }
.btn.secondary { background: var(--surface2); color: var(--text); }
.btn.block { width: 100%; }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1.25rem 0; }
.sticky-cta {
  position: fixed; left: 0; right: 0; bottom: 0; padding: .75rem 1rem;
  background: rgba(15,20,25,.96); border-top: 1px solid #2a3544; z-index: 30;
}
.sticky-cta .inner { max-width: var(--max); margin: 0 auto; }
.disclosure {
  font-size: .78rem; color: var(--muted); border-top: 1px solid #2a3544;
  margin-top: 2.5rem; padding-top: 1rem;
}
.grid2 { display: grid; gap: .85rem; }
@media (min-width: 640px) { .grid2 { grid-template-columns: 1fr 1fr; } }
.hub-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--surface); border: 1px solid #2a3544; border-radius: var(--radius);
  padding: 1.25rem; transition: border-color .15s, transform .15s;
}
.hub-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.hub-card h2 { margin: .35rem 0 .5rem; color: var(--text); }
.hub-card p { margin: 0; color: var(--muted); font-size: .95rem; }
.tag { color: var(--accent2); font-size: .8rem; font-weight: 600; }
.check { color: var(--accent); }
.warn-box {
  background: #2a2618; border: 1px solid #5a4d28; color: var(--warn);
  border-radius: var(--radius); padding: 1rem 1.1rem; font-size: .92rem; margin: 1rem 0;
}
.pros cons, .split { display: grid; gap: .85rem; }
@media (min-width: 640px) { .split { grid-template-columns: 1fr 1fr; } }
.ok { border-left: 3px solid var(--accent); }
.no { border-left: 3px solid var(--danger); }
.hero-audifort { background: radial-gradient(ellipse at top, #1a3030 0%, transparent 55%); padding-top: 1.5rem; }
.hero-techo { background: radial-gradient(ellipse at top, #1a2438 0%, transparent 55%); padding-top: 1.5rem; }
.print-only { display: none; }
@media print {
  .site-header, .sticky-cta, .no-print { display: none !important; }
  .print-only { display: block; }
  body { background: #fff; color: #111; }
  .card { border: 1px solid #ccc; background: #fff; }
  a { color: #06c; }
}