/* Reusable component styling for links, mascot panel, and floor strip. */

/* Glassmorphism recipe used throughout this portal: a translucent rgba()
   background (never solid) + backdrop-filter blur so the ambient .page-glow
   gradient stays visible through cards, plus a low-opacity white border and
   a soft box-shadow to fake edge lighting instead of a hard outline. The
   -webkit- prefix is required for Safari, which never shipped unprefixed
   backdrop-filter support. Applied consistently to a.portal-link and aside
   below so new cards should reuse this trio (background/backdrop-filter/
   box-shadow) rather than inventing a new surface treatment. */
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  height: 100%;
  justify-content: space-between;
  /* Six cards' natural height exceeds .frame's available space on plenty of
     ordinary laptop viewports (measured: still clipped at 1280x900, not
     just short/mobile screens), and .content above is overflow:hidden by
     design. Scrolling the list itself keeps every link reachable without
     touching that outer no-scroll shell - invisible when everything already
     fits, a real scrollbar only when it doesn't. */
  overflow-y: auto;
  /* Setting only overflow-y is a known CSS trap: per spec, the other axis's
     'visible' computes to 'auto' too once one axis is non-visible, so a
     horizontal scrollbar could appear from sub-pixel rounding alone even
     with nothing that actually overflows sideways. Pin it off explicitly. */
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  /* Replace the native OS scrollbar (thick, arrowed, themed by the browser/
     OS rather than this page) with a slim themed one - Firefox via
     scrollbar-width/-color, Chromium/Safari via the ::-webkit- rules below.
     Both stay just as demand-driven as the plain overflow-y: auto above:
     nothing renders unless nav ul actually overflows. */
  scrollbar-width: thin;
  scrollbar-color: rgba(126, 224, 255, 0.35) transparent;
}

nav ul::-webkit-scrollbar {
  width: 6px;
}

nav ul::-webkit-scrollbar-track {
  background: transparent;
}

nav ul::-webkit-scrollbar-thumb {
  background-color: rgba(126, 224, 255, 0.35);
  border-radius: 999px;
}

nav ul::-webkit-scrollbar-thumb:hover {
  background-color: rgba(126, 224, 255, 0.55);
}

nav li {
  perspective: 1000px;
  display: flex;
}

a.portal-link {
  display: block;
  width: 100%;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 0.8rem 0.9rem;
  background: rgba(15, 23, 42, 0.4);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex: 1;
}

a.portal-link::before {
  content: ">";
  position: absolute;
  left: 0.7rem;
  top: 50%;
  transform: translateY(-52%);
  color: var(--accent-2);
  opacity: 0.85;
}

a.portal-link .label,
a.portal-link .meta {
  padding-left: 1.1rem;
}

a.portal-link:hover,
a.portal-link:focus-visible {
  transform: translateY(-2px) rotateX(2deg);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow:
    0 8px 32px 0 rgba(0, 0, 0, 0.3),
    0 0 18px rgba(126, 224, 255, 0.12);
  background: rgba(255, 255, 255, 0.1);
  outline: none;
}

.label {
  display: block;
  font-weight: 700;
  color: var(--accent);
}

.meta {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

aside {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 1.5rem;
  background: rgba(15, 23, 42, 0.4);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

aside:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3), 0 0 18px rgba(126, 224, 255, 0.12);
}

.aside-title {
  margin: 0 0 0.55rem;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  font-family: var(--font-terminal);
}

.mascot-stack {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  transition: transform 160ms ease, filter 160ms ease;
  width: 100%;
  max-width: none;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  background: rgba(5, 10, 18, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

aside:hover .mascot-stack {
  transform: translateY(-1px) scale(1.01);
  filter: saturate(1.05);
}

.mascot {
  display: block;
  width: 100%;
  max-height: 35vh;
  height: auto;
  margin: 0;
  image-rendering: pixelated;
  object-fit: contain;
  transition: transform 160ms ease, filter 160ms ease;
}

aside:hover .mascot {
  transform: translateY(-1px) rotate(-1deg);
  filter: drop-shadow(0 0 12px rgba(126, 224, 255, 0.16));
}

.banner-logo {
  display: block;
  width: 100%;
  max-height: 14vh;
  height: auto;
  object-fit: contain;
  border: 0;
  border-radius: 0;
  background: rgba(5, 10, 18, 0.8);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

aside:hover .banner-logo {
  transform: translateY(1px);
  box-shadow: none;
}

.aside-note {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  font-family: var(--font-ui);
}

footer.portal-floor {
  position: relative;
  border-top: 1px solid rgba(0, 0, 0, 0);
  background-color: #000000;
  min-height: 132px;
  overflow: hidden;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

footer.portal-floor:hover {
  border-top-color: rgba(0, 0, 0, 0);
  box-shadow: inset 0 1px 0 rgba(0, 0, 0, 0);
}

.floor-label {
  margin: 0;
  padding: 0.45rem 0.8rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--font-terminal);
}

.floor-track {
  position: relative;
  --floor-span: min(1240px, 96vw);
  width: var(--floor-span);
  height: 96px;
  margin: 0 auto;
  overflow: hidden;
}

.marine {
  position: absolute;
  left: 0;
  bottom: 14px;
  --marine-size: clamp(100px, 11vw, 128px);
  width: var(--marine-size);
  height: auto;
  image-rendering: pixelated;
  transform-origin: left center;
  will-change: transform;
  animation: walk-across 21s linear infinite;
}