/* ============================================================
   SITE FOOTER
============================================================ */
.site-footer {
  background: var(--c-dark);
  color: #B7C4BB;
  margin-top: 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding: 72px 24px 56px;
}

/* BRAND */
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

/* LOGO IMAGE (cuando existe logo.png) */
.footer-logo {
  display: block;
  height: 48px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
}

/* FALLBACK */
.footer-brand .brand-mark {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: var(--c-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.footer-brand .brand-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 17px;
  color: var(--c-white);
}

.footer-desc {
  font-size: 14.5px;
  line-height: 1.7;
  color: #9FB0A4;
  margin: 0 0 22px;
  max-width: 340px;
}

.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,.06);
  color: #C7D2C9;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.footer-social a:hover {
  background: var(--c-accent);
  color: var(--c-dark);
  transform: translateY(-2px);
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-white);
  margin: 0 0 20px;
}
.footer-heading-areas { margin-top: 26px; }

.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: 14.5px;
  color: #9FB0A4;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.footer-links a:hover { color: var(--c-accent); padding-left: 4px; }

.footer-contact { display: flex; flex-direction: column; gap: 12px; margin-bottom: 4px; }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14.5px;
  color: #9FB0A4;
}
.footer-contact i { color: var(--c-accent); width: 16px; text-align: center; }
.footer-contact a { color: #9FB0A4; transition: color var(--dur) var(--ease); }
.footer-contact a:hover { color: var(--c-white); }

.footer-areas {
  font-size: 14px;
  color: #839488;
  line-height: 1.75;
  margin: 0 0 22px;
}

.footer-cta { padding: 12px 20px; font-size: 14px; }

/* BOTTOM BAR */
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 22px 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13.5px;
  color: #839488;
}
.footer-bottom-inner p { margin: 0; }
.footer-legal { display: flex; gap: 22px; }
.footer-legal a { transition: color var(--dur) var(--ease); }
.footer-legal a:hover { color: var(--c-accent); }

/* BACK TO TOP */
.back-to-top {
  position: fixed;
  right: 22px; bottom: 22px;
  width: 46px; height: 46px;
  border-radius: var(--radius-md);
  background: var(--c-primary);
  color: var(--c-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--dur) var(--ease),
              visibility var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
  z-index: 800;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover { background: var(--c-primary-700); }

/* RESPONSIVE */
@media (max-width: 980px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-brand-col { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  .footer-top { grid-template-columns: 1fr; padding: 56px 24px 40px; gap: 36px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .footer-legal { gap: 16px; }
  .footer-logo { height: 42px; max-width: 180px; }
}