/* =============================================================
   TRI GLOBAL FOOTER — shared across all pages
   Matches lab-reports.html design exactly
   ============================================================= */

#tri-footer {
  background: #000;
  padding: 64px 0 32px;
  font-family: 'DM Sans', 'Inter', sans-serif;
}
.tri-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
}
.tri-footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
/* Brand column */
.tri-footer-brand p {
  font-size: 13px;
  color: rgba(255,255,255,.45);
  line-height: 1.7;
  margin-top: 14px;
  max-width: 220px;
}
/* Link columns */
.tri-footer-col h4 {
  font-family: 'Montserrat', sans-serif;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,.3);
  margin-bottom: 18px;
}
.tri-footer-col a {
  display: block;
  font-size: 13.5px;
  color: rgba(255,255,255,.55);
  margin-bottom: 10px;
  transition: color 0.2s;
  text-decoration: none;
}
.tri-footer-col a:hover { color: #fff; }
/* Bottom bar */
.tri-footer-bottom {
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.tri-footer-copy {
  font-size: 12px;
  color: rgba(255,255,255,.3);
}
.tri-footer-legal { display: flex; gap: 20px; }
.tri-footer-legal a {
  font-size: 12px;
  color: rgba(255,255,255,.3);
  transition: color 0.2s;
  text-decoration: none;
}
.tri-footer-legal a:hover { color: rgba(255,255,255,.6); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .tri-footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .tri-footer-inner { padding: 0 32px; }
}
@media (max-width: 640px) {
  #tri-footer { padding: 48px 0 24px; }
  .tri-footer-inner { padding: 0 20px; }
  .tri-footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    padding-bottom: 32px;
  }
  .tri-footer-brand { grid-column: 1 / -1; }
  .tri-footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 20px;
  }
}
@media (max-width: 400px) {
  .tri-footer-top { grid-template-columns: 1fr; }
}