/* ==========================================================================
   SK SERVICES — FOOTER STYLES
   ========================================================================== */

.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: clamp(32px, 5vw, 60px);
  padding-bottom: clamp(40px, 6vw, 64px);
}

.footer-brand { display: flex; flex-direction: column; gap: 16px; max-width: 320px; }
.footer-logo { display: flex; align-items: center; gap: 10px; }
.footer-logo img { width: 30px; height: 30px; border-radius: 50%; }
.footer-logo span { font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; }
.footer-tagline { color: var(--text-faint); font-size: 0.9rem; line-height: 1.6; }

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 20px;
}
.footer-nav ul { display: flex; flex-direction: column; gap: 13px; }
.footer-nav a {
  color: var(--text-soft);
  font-size: 0.92rem;
  transition: color var(--dur-fast) var(--ease-out), padding-left var(--dur-fast) var(--ease-out);
}
.footer-nav a:hover { color: var(--accent-light); padding-left: 4px; }

.footer-social-icons { display: flex; gap: 12px; }
.social-icon {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-soft);
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.social-icon svg { width: 18px; height: 18px; }
.social-icon:hover { color: var(--accent-light); border-color: var(--accent); transform: translateY(-3px); }

.footer-bottom {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 26px var(--section-pad-x);
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 28px;
}
.footer-bottom p { color: var(--text-faint); font-size: 0.85rem; }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  order: 2;
}
.footer-legal a {
  color: var(--text-faint);
  font-size: 0.85rem;
  transition: color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.footer-legal a:hover, .footer-legal a:focus-visible { color: var(--accent-light); }

.footer-bottom-copy { order: 1; }
.back-to-top { order: 3; }

.back-to-top {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-soft);
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), opacity var(--dur-med) var(--ease-out);
  opacity: 0;
  pointer-events: none;
}
.back-to-top.is-visible { opacity: 1; pointer-events: auto; }
.back-to-top svg { width: 18px; height: 18px; }
.back-to-top:hover { border-color: var(--accent); color: var(--accent-light); transform: translateY(-3px); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; max-width: 100%; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 16px; }
  .footer-bottom-copy, .footer-legal, .back-to-top { order: initial; }
  .footer-legal { justify-content: center; }
}