/* Project 5 additions to the shared Xin styles from Projects 3 and 4. */
.xin-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 16px 20px 0;
}

.xin-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--xin-muted);
  font-size: 13.5px;
  text-decoration: none;
}

.xin-nav a:hover {
  color: var(--xin-ink);
  background: var(--xin-hover);
}

.xin-nav a[aria-current="page"] {
  color: var(--xin-blue-dk);
  background: var(--xin-surface);
  border-color: var(--xin-tint-line);
  font-weight: 650;
}

a:focus-visible {
  outline: 2px solid var(--xin-blue);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 0;
  z-index: 10;
  padding: 12px 16px;
  transform: translateY(-120%);
  background: var(--xin-surface);
  color: var(--xin-blue-dk);
}

.skip-link:focus {
  transform: translateY(8px);
}

.portal-hero {
  margin: 8px 0 28px;
}

.portal-hero .xin-lede {
  margin-bottom: 0;
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.portal-tile {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  min-height: 180px;
  padding: 22px;
  background: var(--xin-surface);
  border: 1px solid var(--xin-line);
  border-left: 3px solid var(--xin-blue);
  border-radius: var(--xin-radius);
  box-shadow: 0 2px 6px rgba(22, 32, 46, 0.04);
  text-decoration: none;
  color: inherit;
  transition: transform 0.12s, box-shadow 0.12s, border-left-color 0.12s;
}

.portal-tile:hover {
  transform: translateY(-2px);
  border-left-color: var(--xin-sky);
  box-shadow: 0 6px 16px rgba(22, 32, 46, 0.08);
}

.portal-tile-name {
  font-weight: 650;
  font-size: 16.5px;
}

.portal-tile-blurb,
.portal-note {
  font-size: 14px;
  color: var(--xin-muted);
}

.portal-tile-action {
  margin-top: auto;
  padding-top: 12px;
  font-size: 14px;
  font-weight: 550;
  color: var(--xin-blue-dk);
}

.portal-note {
  margin: 24px 0 0;
  max-width: 66ch;
}

.game-scores {
  flex-wrap: wrap;
  max-width: 100%;
  gap: 8px;
}

.game-score {
  min-width: 68px;
  padding: 7px 10px;
}

.game-touch {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 18px;
}

.game-touch .xin-btn {
  min-width: 48px;
  min-height: 48px;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.game-touch .is-pressed {
  background: var(--xin-tint);
  border-color: var(--xin-blue);
}

@media (max-width: 560px) {
  .xin-nav {
    padding: 12px 16px 0;
    gap: 4px;
  }

  .xin-nav a {
    padding: 7px 10px;
  }

  .portal-grid {
    grid-template-columns: 1fr;
  }

  .portal-tile {
    min-height: 160px;
    padding: 20px;
  }

  .game-overlay {
    padding: 14px;
  }

  .game-overlay-title {
    font-size: 21px;
  }

  .game-overlay-text {
    font-size: 13px;
    margin-bottom: 4px;
  }

  .page-snake .game-stage,
  .page-invaders .game-stage {
    min-height: 240px;
    display: grid;
    align-items: center;
    background: var(--xin-ink);
    border-radius: 10px;
  }
}

@media (max-width: 380px) {
  .game-over-scores .game-score-value {
    font-size: 22px;
  }

  .game-over-hint {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .portal-tile {
    transition: none;
  }

  .portal-tile:hover {
    transform: none;
  }
}