/* CSS-only loading animation before Vue mounts. */

:root {
  --app-loading-bg: #f4f6fa;
  --app-loading-surface: #ffffff;
  --app-loading-primary: #3698cb;
  --app-loading-primary-dark: #2d82af;
  --app-loading-primary-light: #62b5df;
}

html,
body,
#app {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--app-loading-bg);
}

#app-loading {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(54, 152, 203, 0.14), rgba(54, 152, 203, 0) 38%),
    radial-gradient(circle at 72% 28%, rgba(98, 181, 223, 0.18), rgba(98, 181, 223, 0) 34%),
    linear-gradient(180deg, var(--app-loading-surface) 0%, var(--app-loading-bg) 100%);
}

#app-loading::before {
  content: "";
  width: 76px;
  height: 76px;
  border-radius: 18px;
  background:
    linear-gradient(90deg, transparent calc(50% - 1px), rgba(255, 255, 255, 0.7) 0 calc(50% + 1px), transparent 0),
    linear-gradient(180deg, transparent calc(50% - 1px), rgba(255, 255, 255, 0.62) 0 calc(50% + 1px), transparent 0),
    linear-gradient(135deg, var(--app-loading-primary-dark) 0%, var(--app-loading-primary) 52%, var(--app-loading-primary-light) 100%);
  box-shadow:
    0 18px 44px rgba(0, 47, 167, 0.2),
    0 0 0 10px rgba(54, 152, 203, 0.08);
  animation: app-loading-mark 1.45s cubic-bezier(0.45, 0, 0.2, 1) infinite;
}

#app-loading::after {
  content: "";
  position: absolute;
  top: calc(50% + 72px);
  left: 50%;
  width: 168px;
  height: 3px;
  border-radius: 999px;
  background:
    linear-gradient(90deg, rgba(54, 152, 203, 0.08), var(--app-loading-primary), rgba(0, 47, 167, 0.16));
  background-size: 220% 100%;
  box-shadow: 0 8px 20px rgba(54, 152, 203, 0.18);
  transform: translateX(-50%);
  animation: app-loading-line 1.15s ease-in-out infinite;
}

@keyframes app-loading-mark {
  0%,
  100% {
    transform: translateY(0) rotate(0deg) scale(1);
    box-shadow:
      0 18px 44px rgba(0, 47, 167, 0.2),
      0 0 0 10px rgba(54, 152, 203, 0.08);
  }

  45% {
    transform: translateY(-8px) rotate(45deg) scale(0.96);
    box-shadow:
      0 28px 58px rgba(0, 47, 167, 0.18),
      0 0 0 16px rgba(54, 152, 203, 0.04);
  }
}

@keyframes app-loading-line {
  0% {
    background-position: 120% 0;
    opacity: 0.45;
  }

  50% {
    opacity: 1;
  }

  100% {
    background-position: -80% 0;
    opacity: 0.45;
  }
}

@media (prefers-color-scheme: dark) {
  #app-loading {
    background:
      linear-gradient(135deg, rgba(54, 152, 203, 0.16), rgba(54, 152, 203, 0) 42%),
      radial-gradient(circle at 72% 28%, rgba(98, 181, 223, 0.16), rgba(98, 181, 223, 0) 34%),
      linear-gradient(180deg, #151a24 0%, #0f141d 100%);
  }

  body {
    background: #0f141d;
  }
}

@media (prefers-reduced-motion: reduce) {
  #app-loading::before,
  #app-loading::after {
    animation: none;
  }
}