/* ==========================================================
   WISAXIS — FOOTER COMPONENT (2026 SaaS Design System)
   Footer branding, multi-column links, and copyright hierarchy.
   ========================================================== */

.app-footer {
  background: transparent;
  border-top: 1px solid var(--border-subtle);
  padding: 4.5rem var(--space-5) 0;
  position: relative;
  z-index: 10;
  overflow: hidden;
}

html[data-theme="light"] .app-footer {
  background: #ffffff;
  border-top-color: var(--border-default);
}

/* ===== FOOTER TOP ===== */
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 3rem;
  max-width: 1240px;
  margin: 0 auto 3rem;
}

.footer-brand {
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-brand h4 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: var(--tracking-tight);
  color: var(--text-main);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand h4 span {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  margin: 0;
  line-height: var(--leading-relaxed);
}

/* ===== COLUMN LINKS ===== */
.footer-cols {
  display: flex;
  gap: 4.5rem;
  flex-wrap: wrap;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 130px;
}

.footer-col h5 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--primary);
  margin: 0 0 8px;
}

.footer-col a {
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color 0.2s ease, transform 0.2s var(--ease-spring);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  -webkit-tap-highlight-color: transparent;
}

.footer-col a:hover {
  color: var(--text-main);
  transform: translateX(4px);
}

.footer-col a:active {
  color: var(--primary);
  transform: translateX(2px);
}

/* ===== FOOTER BOTTOM ===== */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  border-top: 1px solid var(--border-subtle);
  padding: 1.75rem 0;
  max-width: 1240px;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: var(--text-xs);
}

.footer-bottom p {
  margin: 0;
  font-weight: 500;
}

.footer-bottom-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.footer-bottom-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--surface-2);
  border: 1px solid var(--border-default);
  transition: all 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.footer-bottom-links a:hover {
  color: var(--text-main);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.footer-bottom-links a:active {
  transform: scale(0.96);
}

/* ===== SIMPLE AUTH FOOTER ===== */
.auth-footer-simple {
  padding: 1.75rem var(--space-4) calc(1.75rem + env(safe-area-inset-bottom, 16px));
  text-align: center;
  border-top: 1px solid var(--border-default);
  background: transparent;
  margin-top: auto;
}

.auth-footer-simple p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: 500;
}

/* ===== TABLET & MOBILE FOOTER (≤768px) ===== */
@media (max-width: 768px) {
  .app-footer {
    padding: 3rem var(--space-4) calc(1.5rem + env(safe-area-inset-bottom, 16px));
  }

  .footer-top {
    flex-direction: column;
    gap: 2.25rem;
    margin-bottom: 2rem;
  }

  .footer-brand {
    max-width: 100%;
  }

  .footer-cols {
    gap: 1.75rem;
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-col {
    background: var(--surface-2);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1rem;
    gap: 8px;
  }

  .footer-col h5 {
    margin-bottom: 4px;
    font-size: 11px;
  }

  .footer-col a {
    padding: 6px 0;
    font-size: var(--text-sm);
    min-height: 36px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    padding-bottom: max(16px, env(safe-area-inset-bottom, 16px));
  }

  .footer-bottom-links {
    justify-content: center;
    gap: 0.6rem;
  }
}

/* ===== NARROW MOBILE FOOTER (≤480px) ===== */
@media (max-width: 480px) {
  .app-footer {
    padding: 2.25rem var(--space-3) calc(1.25rem + env(safe-area-inset-bottom, 16px));
  }

  .footer-brand h4 {
    font-size: 1.15rem;
  }

  .footer-brand p {
    font-size: var(--text-xs);
    line-height: 1.5;
  }

  .footer-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .footer-col {
    padding: 1rem 0.85rem;
  }

  .footer-col a {
    font-size: 12.5px;
    min-height: 34px;
  }

  .footer-bottom {
    font-size: 11px;
    padding: 1.25rem 0 max(12px, env(safe-area-inset-bottom, 12px));
    gap: 0.85rem;
  }

  .footer-bottom-links a {
    font-size: 10.5px;
    padding: 4px 8px;
  }
}

/* ===== ULTRA-NARROW FOOTER (≤360px) ===== */
@media (max-width: 360px) {
  .footer-cols {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}