.portfolio-return-link {
  position: fixed;
  z-index: 10000;
  left: max(clamp(0.75rem, 2vw, 1.75rem), env(safe-area-inset-left));
  bottom: max(clamp(0.75rem, 2vw, 1.75rem), env(safe-area-inset-bottom));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 44px;
  box-sizing: border-box;
  padding: 0.7rem 1rem;
  border: 1px solid rgba(248, 247, 244, 0.82);
  border-radius: 999px;
  background: transparent;
  color: #f8f7f4;
  box-shadow:
    0 0 0 1px rgba(28, 43, 53, 0.48),
    0 4px 18px rgba(28, 43, 53, 0.12);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.035em;
  text-decoration: none;
  text-shadow: 0 1px 4px rgba(28, 43, 53, 0.95);
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  transition:
    background-color 220ms ease,
    border-color 220ms ease,
    box-shadow 220ms ease,
    color 220ms ease,
    text-shadow 220ms ease,
    transform 220ms ease;
}

.portfolio-return-link::before {
  content: "\2190";
  font-size: 1.1em;
  line-height: 1;
  transform: translateY(-0.02em);
}

.portfolio-return-link:hover,
.portfolio-return-link:focus-visible {
  border-color: rgba(248, 247, 244, 0.96);
  background: rgba(28, 43, 53, 0.94);
  color: #ffffff;
  box-shadow:
    0 0 0 1px rgba(28, 43, 53, 0.3),
    0 9px 24px rgba(28, 43, 53, 0.3);
  text-decoration: none;
  text-shadow: none;
  transform: translateY(-2px);
}

.portfolio-return-link:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 3px;
}

@media (max-width: 620px) {
  .portfolio-return-link {
    min-height: 42px;
    padding: 0.62rem 0.82rem;
    font-size: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .portfolio-return-link {
    transition: none;
  }
}