:root {
  --icon-size-desktop: 48px;
  --icon-offset-desktop: 32px;
  --icon-size-mobile: 40px;
  --icon-offset-mobile: 20px;
  --focus-color: #ffffff;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  position: relative;
  background-color: #000;
}

.background {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 60%;
  display: block;
}

.icon-link {
  position: fixed;
  bottom: var(--icon-offset-desktop);
  right: var(--icon-offset-desktop);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--icon-size-desktop);
  height: var(--icon-size-desktop);
  border-radius: 6px;
  background-color: rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(2px);
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.icon-link:hover {
  background-color: rgba(0, 0, 0, 0.4);
  transform: scale(1.06);
}

.icon-link:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

.icon {
  width: 70%;
  height: 70%;
  object-fit: contain;
  pointer-events: none;
}

@media (max-width: 600px) {
  .icon-link {
    bottom: var(--icon-offset-mobile);
    right: var(--icon-offset-mobile);
    width: var(--icon-size-mobile);
    height: var(--icon-size-mobile);
  }
}

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