:root {
  --red: #e30613;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu,
    "Helvetica Neue", Arial;
}

/* ===== PRELOADER ===== */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #fff url("expander_zmieniamy.png") center center / cover
    no-repeat fixed;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

#preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

#preloader .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.12),
    rgba(255, 255, 255, 0.5)
  );
}

#preloader .center {
  position: relative;
  display: grid;
  gap: 10px;
  justify-items: center;
  text-align: center;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid rgba(255, 255, 255, 0.7);
  border-top-color: var(--red);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  filter: drop-shadow(0 1px 6px rgba(0, 0, 0, 0.25));
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loading-text {
  margin: 0;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
}

/* ===== APP ===== */
.app[hidden] {
  display: none !important;
}

.app {
  position: relative;
  min-height: 100dvh;
  background: #fff url("expander_zmieniamy.png") center center / cover
    no-repeat fixed;
}

.fullscreen-link {
  position: absolute;
  inset: 0;
  display: block;
  text-indent: -9999px;
  z-index: 1;
}

.fullscreen-link:focus-visible {
  outline: 3px solid var(--red);
  outline-offset: -3px;
}

/* ===== DOWIEDZ SIĘ WIĘCEJ ===== */
.more-info {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  z-index: 2;
  color: #000;
}


.more-info__title {
  font-weight: 650;
  line-height: 1.2;
  margin-bottom: 40px;

  /* RESPONSYWNE POWIĘKSZENIE */
  font-size: clamp(18px, 3vw, 28px);

  letter-spacing: 0.02em;
}


.more-info__icons a {
  margin: 0 12px;
  font-size: 26px;
  color: #000;
  transition: color 0.2s ease, transform 0.2s ease;
}


.more-info__icons a:hover {
  color: #fff; /* biały */
  transform: translateY(-3px);
}


@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation: none;
    border-top-color: #bbb;
  }

  #preloader {
    transition: none;
  }
}
``