.footer-line {
  padding: 0 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--warm-mid);
  text-transform: uppercase;
  opacity: 0;
  animation: fadeUp 0.8s ease 1.1s forwards;
  gap: 1rem;
}

.footer-copy {
  white-space: nowrap;
  flex-shrink: 0;
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

#globalTopBtn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(var(--cream-rgb),0.25);
  color: var(--warm-mid);
  background: rgba(var(--ink-rgb),0.3);
  backdrop-filter: blur(6px);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: color 0.2s, border-color 0.2s, background 0.25s ease, opacity 0.4s ease, visibility 0.4s ease;
}

#globalTopBtn.visible {
  opacity: 1;
  visibility: visible;
}

#globalTopBtn:hover {
  color: var(--cream);
  border-color: rgba(var(--cream-rgb),0.6);
  background: rgba(var(--ink-rgb),0.9);
}

#globalTopBtn svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
}

/* ── SUBPAGE BACKGROUND IMAGE ── */
.subpage-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 0;
  pointer-events: none;
}

.subpage-bg-img {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.16;
}

.subpage-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(var(--ink-rgb),0.25) 0%,
    transparent 12%,
    transparent 55%,
    rgba(var(--ink-rgb),0.12) 65%,
    rgba(var(--ink-rgb),0.4)  75%,
    rgba(var(--ink-rgb),0.7)  84%,
    rgba(var(--ink-rgb),0.92) 92%,
    rgba(var(--ink-rgb),1.0)  100%
  );
  z-index: 1;
}

/* cover variant — for landscape images, pins to viewport like landing page */
.subpage-bg--cover {
  bottom: 0;
  right: 0;
}

.subpage-bg--cover .subpage-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

/* lift content above bg */
.subpage > *:not(.subpage-bg) {
  position: relative;
  z-index: 2;
}

/* ── SUBPAGE OVERLAY ── */
.subpage {
  position: fixed;
  inset: 0;
  background: var(--ink);
  z-index: 10;
  display: flex;
  flex-direction: column;
  padding: 2.4rem 3rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: opacity 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  overflow-y: auto;
  outline: none;
}

.subpage--paper {
  padding: 0;
}

.subpage--paper.active {
  overflow: hidden;
}

.subpage--paper.active ~ #globalTopBtn {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

.subpage--paper > .breadcrumb {
  display: flex;
  padding: 1.4rem 2rem;
  flex-shrink: 0;
}

.paper-frame {
  display: none;
  width: 100%;
  border: none;
  background: var(--ink);
}

.subpage--paper.active .paper-frame {
  display: block;
  flex: 1;
  min-height: 0;
}

.subpage.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .subpage { padding: 2.4rem 1.5rem; }
  .footer-line { padding: 0 1.5rem; }
}


@media (max-width: 520px) {
  .subpage { padding: 2rem 1.2rem; }
  .footer-line { padding: 0 1.2rem; }
  .footer-right { gap: 1rem; }
}