/**
 * Lydia Sierra — Personal Developer Portfolio
 * Global Footer Component Stylesheet
 * Conforming to DESIGN_SPEC.md & Visual Direction
 */

/* ==========================================================================
   Global Footer Landmark
   ========================================================================== */
.site-footer {
  position: relative;
  width: 100%;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding-block: clamp(2rem, 1.5rem + 1.5vw, 3rem) var(--space-6);
  margin-top: 0;
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base);
}

.footer-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* ==========================================================================
   Footer Top: Brand, In-Page Nav & Social Links
   ========================================================================== */
.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-6);
}

/* Footer Brand */
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer-brand .brand-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text-main);
  transition: color var(--transition-fast);
}

.footer-brand .brand-link:hover {
  color: var(--color-primary);
}

.footer-brand .brand-icon {
  color: var(--color-primary);
  flex-shrink: 0;
}

[data-theme="dark"] .footer-brand .brand-icon {
  color: #9EC4A7;
}

.footer-brand .brand-name {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--color-text-main);
}

.footer-tagline {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Footer In-Page Navigation */
.footer-nav {
  display: flex;
  align-items: center;
}

.footer-nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: 0;
  list-style: none;
}

.footer-nav-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: 0.25rem 0.15rem;
  position: relative;
}

.footer-nav-link:hover {
  color: var(--color-primary);
}

/* Footer Social & Professional Links */
.footer-socials {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0;
  list-style: none;
  flex-wrap: wrap;
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.75rem;
  min-height: 38px;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  text-decoration: none;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.footer-social-link svg {
  color: var(--color-primary);
  flex-shrink: 0;
  transition: color var(--transition-fast);
}

[data-theme="dark"] .footer-social-link svg {
  color: #9EC4A7;
}

.footer-social-link:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* ==========================================================================
   Footer Bottom: Copyright & Back-to-Top
   ========================================================================== */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}

.footer-copy {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.back-to-top-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-xs);
  border: 1px solid transparent;
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.back-to-top-link:hover {
  color: var(--color-primary);
  background-color: var(--color-surface);
  border-color: var(--color-border);
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 860px) {
  .footer-top {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-5);
  }

  .footer-nav-list {
    gap: var(--space-3);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
}

@media (max-width: 640px) {
  .site-footer {
    padding-block: var(--space-8) var(--space-6);
  }

  .footer-nav-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
    gap: var(--space-2);
  }

  .footer-socials {
    width: 100%;
  }

  .footer-social-link {
    flex: 1 1 auto;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .footer-social-link:hover {
    transform: none;
  }
}