#page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #F0F3FA;
  transition: opacity 0.4s ease;
}

#page-loader.page-loader--hidden {
  opacity: 0;
  pointer-events: none;
}

.page-loader__wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 15px;
  
  width: min(90%, 220px);
}

@media (max-width: 640px) {
  .page-loader__wrapper {
    transform: scale(0.75);
  }
}

.page-loader__duck-stage {
  position: relative;
  width: 120px;
  height: 120px;
  overflow: hidden;
}

.page-loader__duck {
  position: absolute;
  top: 30px;
  left: 20px;
  animation: page-loader-swim 1.5s ease-in-out infinite alternate;
}

.page-loader__duck-head {
  width: 45px;
  height: 45px;
  background-color: #fbbf24;
  border-radius: 50%;
  position: relative;
  left: 35px;
  z-index: 2;
}

.page-loader__duck-eye {
  width: 8px;
  height: 8px;
  background-color: #395886;
  border-radius: 50%;
  position: absolute;
  top: 14px;
  right: 12px;
}

.page-loader__duck-beak {
  width: 25px;
  height: 12px;
  background-color: #f59e0b;
  border-radius: 20px;
  position: absolute;
  top: 22px;
  right: -15px;
}

.page-loader__duck-body {
  width: 80px;
  height: 50px;
  background-color: #fbbf24;
  border-radius: 50px 50px 20px 20px;
  position: relative;
  top: -15px;
}

@keyframes page-loader-swim {
  0%   { transform: translateY(0) rotate(-3deg); }
  100% { transform: translateY(8px) rotate(3deg); }
}

.page-loader__square {
  width: 50px;
  aspect-ratio: 1;
  display: grid;
}

.page-loader__square::before,
.page-loader__square::after {
  content: "";
  grid-area: 1/1;
  margin: 0 0 15px 15px;
  --c: #0000 calc(100% / 3), #395886 0 calc(2 * 100% / 3), #0000 0;
  --c1: linear-gradient(90deg, var(--c));
  --c2: linear-gradient(0deg, var(--c));
  background: var(--c1), var(--c2), var(--c1), var(--c2);
  background-size: 300% 4px, 4px 300%;
  background-repeat: no-repeat;
  animation: page-loader-square 1s infinite linear;
}

.page-loader__square::after {
  margin: 15px 15px 0 0;
  transform: scale(-1, -1);
}

@keyframes page-loader-square {
  0%     { background-position: 50% 0, 100% 100%, 0 100%, 0 0; }
  25%    { background-position: 0 0, 100% 50%, 0 100%, 0 0; }
  50%    { background-position: 0 0, 100% 0, 50% 100%, 0 0; }
  75%    { background-position: 0 0, 100% 0, 100% 100%, 0 50%; }
  75.01% { background-position: 100% 0, 100% 0, 100% 100%, 0 50%; }
  100%   { background-position: 50% 0, 100% 0, 100% 100%, 0 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .page-loader__duck,
  .page-loader__square::before,
  .page-loader__square::after {
    animation: none;
  }
}