/* Footer moderno y responsivo sin Bootstrap */
:root {
  --nai-primary: #1f7971;
  --nai-secondary: #2d8a7f;
  --nai-on-primary: #ffffff;
  --nai-surface: #0d4742;
  --nai-muted: rgba(255,255,255,0.75);
}

.nai-footer {
  background: var(--nai-primary);
  color: var(--nai-on-primary);
  padding: clamp(32px, 4vw, 56px) 16px;
  position: relative;
  isolation: isolate;
  border-top-left-radius: 12px;
  border-top-right-radius: 12px;
  overflow: hidden;
}

/* Sutil textura diagonal */
.nai-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(1000px 400px at -10% 110%, rgba(255,255,255,0.08), transparent 60%),
              radial-gradient(800px 300px at 110% -10%, rgba(255,255,255,0.06), transparent 60%);
  pointer-events: none;
}

.nai-footer__inner {
  margin: 0 auto;
  max-width: min(1100px, 92vw);
  display: grid;
  grid-template-columns: 1fr;
  grid-auto-rows: auto;
  gap: clamp(16px, 3vw, 28px);
  text-align: center;
}

.nai-footer__brand { display: flex; justify-content: center; }

.nai-footer__logo {
  display: block;
  max-width: clamp(160px, 20vw, 220px);
  height: auto;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.25));
}

.nai-footer__contact {
  margin: 0 auto;
  max-width: 900px;
  font-style: normal;
  line-height: 1.7;
  color: var(--nai-muted);
}

.nai-footer__contact a {
  color: #ffffff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.nai-footer__social {
  list-style: none;
  margin: 8px auto 4px;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(10px, 2.5vw, 18px);
}

.btn--circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
}

.btn--circle:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0,0,0,0.3); }
.btn--circle i { font-size: 20px; }

.btn--facebook { background:#3b5998; }
.btn--linkedin { background:#0a66c2; }
.btn--youtube { background:#ff0000; }
.btn--email { background:#f37021; }

.nai-footer__credits {
  margin: 0;
  color: var(--nai-on-primary);
  opacity: .9;
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.nai-footer__badge {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  padding: 6px;
}

/* Mantener disposición en una sola columna centrada en todos los tamaños */

/* Ajustes pequeños y accesibilidad */
.nai-footer a:focus-visible,
.btn--circle:focus-visible { outline: 3px solid #fff; outline-offset: 2px; }

/* Evitar que optimizaciones globales oculten el footer */
footer, #site-footer, .nai-footer { content-visibility: visible; contain-intrinsic-size: auto; }