.footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--color-bg);
  padding-top: var(--space-12);
  padding-bottom: var(--space-8);
}

.footer__top {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Brand column */
.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.footer__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__logo-mark {
  height: 40px;
  background: #080808;
  border-radius: var(--radius-sm);
  padding: 2px 4px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-shrink: 0;
}

.footer__logo-mark img {
  width: auto;
  height: 100%;
  max-height: 40px;
  object-fit: contain;
}

.footer__logo-mark span {
  font-family: var(--font-mono);
  font-weight: var(--weight-bold);
  font-size: 0.95rem;
  color: #080808;
}

.footer__logo-name {
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  letter-spacing: 0.04em;
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-white-muted);
  line-height: var(--leading-normal);
  max-width: 260px;
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social-link {
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white-muted);
  transition: border-color var(--duration-fast),
              color var(--duration-fast),
              background var(--duration-fast);
}

.footer__social-link:hover {
  border-color: var(--color-green);
  color: var(--color-green);
  background: var(--color-green-subtle);
}

.footer__social-link svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.footer__social-link i {
  font-size: 15px;
  line-height: 1;
  flex-shrink: 0;
}

/* Nav columns */
.footer__col {}

.footer__col-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-white);
  margin-bottom: var(--space-5);
}

.footer__col-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__col-link {
  font-size: var(--text-sm);
  color: var(--color-white-muted);
  text-decoration: none;
  transition: color var(--duration-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.footer__col-link:hover {
  color: var(--color-white);
}

.footer__col-link--green:hover {
  color: var(--color-green);
}

/* Bottom bar */
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-8);
  flex-wrap: wrap;
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-white-muted);
  font-family: var(--font-mono);
}

.footer__copy span {
  color: var(--color-green);
}

.footer__legal {
  display: flex;
  gap: var(--space-6);
}

.footer__legal-link {
  font-size: var(--text-xs);
  color: var(--color-white-muted);
  text-decoration: none;
  transition: color var(--duration-fast);
  cursor: pointer;
}

.footer__legal-link:hover {
  color: var(--color-white);
}

/* Status indicator */
.footer__status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-white-muted);
}

.footer__status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 6px var(--color-green);
  animation: pulse-dot 2.5s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* ── Newsletter bar ── */
.footer__newsletter {
  padding-block: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--space-12);
}

.footer__newsletter-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-12);
}

.footer__newsletter-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-green);
  margin-bottom: var(--space-2);
}

.footer__newsletter-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-white);
  margin-bottom: var(--space-2);
  line-height: var(--leading-tight);
}

.footer__newsletter-sub {
  font-size: var(--text-sm);
  color: var(--color-white-muted);
  max-width: 480px;
  line-height: var(--leading-normal);
}

.footer__newsletter-form {
  display: flex;
  gap: var(--space-3);
  flex-shrink: 0;
  align-items: center;
}

.footer__newsletter-input {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  color: var(--color-white);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  padding: 0.65rem var(--space-5);
  border-radius: var(--radius-md);
  width: 260px;
  outline: none;
  transition: border-color var(--duration-normal), background var(--duration-normal);
}

.footer__newsletter-input::placeholder {
  color: var(--color-white-muted);
}

.footer__newsletter-input:focus {
  border-color: var(--color-green);
  background: rgba(0, 180, 219, 0.04);
}

.footer__newsletter-btn {
  padding: 0.65rem var(--space-6);
  background: var(--color-green);
  color: #080808;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--duration-normal), transform var(--duration-fast);
}

.footer__newsletter-btn:hover {
  background: var(--color-green-dim);
  transform: translateY(-1px);
}

.footer__newsletter-confirm {
  display: none;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-green);
  font-family: var(--font-mono);
}

.footer__newsletter-confirm.is-visible {
  display: flex;
}

/* Footer logo — real image */
.footer__logo-mark {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.footer__logo-mark img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.85;
  transition: opacity var(--duration-fast);
}

.footer__logo:hover .footer__logo-mark img {
  opacity: 1;
}

/* ── Back to top ── */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 44px;
  height: 44px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white-dim);
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--duration-normal), transform var(--duration-normal), border-color var(--duration-normal), color var(--duration-normal);
  z-index: 90;
}
.back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.back-to-top:hover {
  border-color: var(--color-green);
  color: var(--color-green);
}

/* Responsive */

/* ── Tablet 768–1024px ── */
@media (max-width: 1024px) {
  .footer__newsletter-inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer__newsletter-form {
    flex-wrap: wrap;
  }

  .footer__newsletter-input {
    width: 100%;
  }

  .footer__newsletter-btn {
    width: 100%;
    justify-content: center;
  }

  /* 2-column grid: brand full-width on top, then 3 cols */
  .footer__top {
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--space-8);
  }

  .footer__brand {
    grid-column: 1 / -1;          /* span all 3 cols */
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-8);
    padding-bottom: var(--space-8);
    border-bottom: 1px solid var(--color-border);
  }

  .footer__brand > * { flex: 0 0 auto; }
  .footer__tagline {
    flex: 1 1 0;
    max-width: none;
    margin: 0;
  }

  .footer__social {
    margin-top: auto;
  }
}

/* ── Mobile <640px ── */
@media (max-width: 640px) {
  .footer {
    padding-top: var(--space-12);
  }

  .footer__newsletter {
    padding-block: var(--space-8);
  }

  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8) var(--space-6);
  }

  .footer__brand {
    grid-column: 1 / -1;
    flex-direction: column;
    gap: var(--space-4);
    padding-bottom: var(--space-6);
  }

  .footer__tagline {
    max-width: 100%;
  }

  /* Contact col spans full width */
  .footer__col:last-child {
    grid-column: 1 / -1;
  }

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

  .footer__legal {
    gap: var(--space-4);
  }
}