/**
 * Tech Sutro — Footer Styles
 * Bold Tech / Dark Glass — a deep frosted glass band with a gradient
 * top hairline, an aurora glow behind the brand column, glass social
 * chips with a gradient hover and gradient link hovers.
 */

/* ==================================================================
   FOOTER BASE — deep frosted glass band
   ================================================================== */

.site-footer {
  position: relative;
  z-index: 1;

  margin-top: auto;
  padding-block: clamp(3rem, 5vw, 4.5rem);

  overflow: hidden;
  isolation: isolate;

  background: linear-gradient(
    180deg,
    var(--glass-bg-strong) 0%,
    var(--bg-surface-2) 100%
  );

  backdrop-filter: blur(var(--glass-blur)) saturate(150%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(150%);

  box-shadow: inset 0 1px 0 0 var(--glass-highlight);
}

/* Gradient top hairline that separates footer from page. */
.site-footer::before {
  content: '';

  position: absolute;
  top: 0;
  left: 0;
  right: 0;

  height: 2px;

  background: var(--accent-gradient);

  opacity: 0.75;

  box-shadow: 0 0 24px var(--accent-glow);

  pointer-events: none;
}

/* ==================================================================
   FOOTER TOP GRID
   ================================================================== */

.footer-top {
  position: relative;
  z-index: 1;

  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: var(--space-10);

  margin-bottom: var(--space-10);
}

@media (max-width: 992px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
}

/* ==================================================================
   BRAND COLUMN — aurora glow behind the brand
   ================================================================== */

.footer-brand {
  position: relative;
  isolation: isolate;

  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* Soft aurora glow that lights the brand column. */
.footer-brand::before {
  content: '';

  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);

  width: 180vw;
  height: 180vh;

  background:
    radial-gradient(circle at 32% 34%, var(--aurora-1) 0%, transparent 64%),
    radial-gradient(circle at 70% 68%, var(--aurora-2) 0%, transparent 66%);

  opacity: 0.5;

  z-index: -1;

  pointer-events: none;
}

.footer-logo {
  position: relative;

  display: inline-flex;
  align-items: center;
  gap: 0.6rem;

  text-decoration: none;
  color: var(--text-primary);

  transition: opacity var(--transition-fast);
}

.footer-logo:hover {
  opacity: 0.88;
}

.footer-logo-img {
  height: 70px;
  width: auto;
  display: block;

  border-radius: var(--radius-sm);
}

.footer-logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.15;
  letter-spacing: -0.02em;

  background: var(--accent-gradient);
  -webkit-background-clip: text;
          background-clip: text;
  color: var(--accent-primary);
  -webkit-text-fill-color: transparent;
}

.footer-tagline {
  font-size: var(--text-sm);
  line-height: var(--leading-base);
  color: var(--text-secondary);
  max-width: 320px;
  margin: 0;
}

.footer-parent {
  font-size: var(--text-xs);
  color: var(--text-muted);
  max-width: 340px;
  margin: 0;
  line-height: var(--leading-loose);
}

/* ==================================================================
   FOOTER GRID (services, products, packages, contact)
   ================================================================== */

.footer-grid {
  position: relative;
  z-index: 1;

  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-8);
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);

  min-width: 0;
}

.footer-heading {
  position: relative;

  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);

  margin-bottom: var(--space-2);
  padding-bottom: 0.6rem;
}

/* Short gradient underline beneath each heading. */
.footer-heading::after {
  content: '';

  display: block;

  width: 26px;
  height: 2px;

  border-radius: var(--radius-full);

  background: var(--accent-gradient);

  opacity: 0.85;
}

.footer-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;

  margin: 0;
  padding: 0;
}

.footer-list a {
  display: inline-flex;
  align-items: center;

  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;

  transition:
    color var(--transition-fast),
    transform var(--transition-fast);
}

/* Gradient text hover with a slight nudge. */
.footer-list a:hover {
  transform: translateX(4px);

  background-image: var(--accent-gradient);
  -webkit-background-clip: text;
          background-clip: text;
  color: var(--accent-primary);
  -webkit-text-fill-color: transparent;
}

.footer-list a:focus-visible {
  color: var(--accent-primary);
}

/* ==================================================================
   SOCIAL LINKS — glass chips with gradient hover
   ================================================================== */

.footer-social {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;

  margin-top: var(--space-3);
}

.footer-social a {
  position: relative;
  z-index: 0;
  overflow: hidden;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: 36px;
  height: 36px;

  border-radius: var(--radius-full);
  border: 1px solid var(--glass-border);

  color: var(--text-secondary);
  background-color: var(--glass-bg-soft);

  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);

  box-shadow: inset 0 1px 0 0 var(--glass-highlight);

  transition:
    transform var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

/* Gradient fill revealed on hover. */
.footer-social a::after {
  content: '';

  position: absolute;
  inset: 0;
  z-index: -1;

  background: var(--accent-gradient);

  opacity: 0;

  transition: opacity var(--transition-base);
}

.footer-social a svg {
  flex-shrink: 0;

  transition: transform var(--transition-fast);
}

.footer-social a:hover {
  color: var(--btn-primary-text);
  border-color: transparent;
  transform: translateY(-2px);

  box-shadow:
    0 12px 26px -12px var(--accent-glow),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.25);
}

.footer-social a:hover::after {
  opacity: 1;
}

.footer-social a:hover svg {
  transform: scale(1.08);
}

.footer-social a:active {
  transform: translateY(0);
}

@media (max-width: 640px) {
  .footer-logo-img {
    height: 56px;
  }

  .footer-tagline,
  .footer-parent {
    max-width: none;
  }
}

/* ==================================================================
   FOOTER BOTTOM (copyright + legal)
   ================================================================== */

.footer-bottom {
  position: relative;
  z-index: 1;

  display: flex;
  align-items: center;
  justify-content: space-between;

  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-6);

  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer-copyright {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin: 0;
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.footer-legal a {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-legal a:hover {
  color: var(--text-primary);
}

@media (max-width: 640px) {
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}