/* ===========================
   A4 Estudio — Footer
   Bold Split · Full-width
   =========================== */

.site-footer {
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding-top: 100px;
  width: 100%;
}

/* Inner: split layout */
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  width: 100%;
  padding: 0 var(--container-padding) 80px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* ---- Brand (left side) ---- */
.footer-brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
}

.footer-brand .footer-logo {
  display: inline-block;
}

.footer-brand .footer-logo img {
  height: 36px;
  filter: brightness(0) invert(1);
}

.footer-tagline {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 300;
  color: var(--color-white);
  line-height: 1.3;
  letter-spacing: -0.02em;
  max-width: 500px;
}

.footer-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  padding: 14px 28px;
  margin-top: 8px;
  background: var(--color-white);
  color: var(--color-black);
  border: none;
  border-radius: 50px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  transition: opacity var(--transition);
}

.footer-cta:hover {
  opacity: 0.85;
}

/* ---- Columns (right side) ---- */
.footer-columns {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
  align-content: start;
  padding-top: 8px;
}

/* Column headings */
.footer-heading {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-white);
  margin-bottom: 24px;
}

/* Nav list */
.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-nav-list li a {
  font-size: 15px;
  color: var(--color-gray-500);
  transition: color var(--transition);
  padding: 6px 0;
  display: inline-block;
}

.footer-nav-list li a:hover {
  color: var(--color-white);
  opacity: 1;
}

/* Contact list */
.contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-list li,
.contact-list li a,
.contact-list li span {
  font-size: 15px;
  color: var(--color-gray-500);
  line-height: 1.5;
}

.contact-list li a:hover {
  color: var(--color-white);
  opacity: 1;
}

/* Social links */
.social-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.social-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-gray-500);
  font-size: 15px;
  transition: color var(--transition);
  padding: 6px 0;
  min-height: 44px;
}

.social-links a i {
  font-size: 22px;
  line-height: 1;
}

.social-links a:hover {
  color: var(--color-white);
  opacity: 1;
}

/* ---- Bottom bar ---- */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 24px var(--container-padding);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-gray-500);
}

.footer-credit a {
  color: var(--color-gray-500);
  transition: color var(--transition);
}

.footer-credit a:hover {
  color: var(--color-gray-300);
  opacity: 1;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 60px;
    padding-bottom: 60px;
  }

  .footer-columns {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .site-footer {
    padding-top: 60px;
  }

  .footer-inner {
    gap: 48px;
    padding-bottom: 48px;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-tagline {
    font-size: 1.6rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
    padding: 20px var(--container-padding);
  }
}

@media (max-width: 480px) {
  .site-footer {
    padding-top: 48px;
  }

  .footer-inner {
    gap: 36px;
    padding-bottom: 36px;
  }

  .footer-tagline {
    font-size: 1.4rem;
  }

  .footer-bottom {
    padding: 16px var(--container-padding);
  }
}