/*
  loader.css
  Route-level loader (theme-agnostic) + progressive image reveal.

  Standards:
  - No blur animation. Only opacity/transform.
  - Reduced motion automatically disables animations.
  - Uses existing theme CSS variables when available.
*/

:root{
  /*
    Premium loader surface:
    - Default to the active theme background so the menu doesn't flash behind.
    - Accent uses existing palette variables.
  */
  --qr-loader-bg: var(--qrbg, var(--bg, #0B1220));
  --qr-loader-text: var(--qrheading, var(--heading, #ffffff));
  --qr-loader-muted: var(--qrmuted, var(--muted, rgba(255,255,255,.78)));
  --qr-loader-accent: var(--qraccent, var(--accent, var(--primary, #34D399)));
  --qr-loader-z: 99999;
}

/* Basic scroll lock while loader is active */
html.qr-route-loading body{
  overflow: hidden !important;
  overscroll-behavior: none;
}

/* Loader overlay */
.qr-route-loader{
  position: fixed;
  inset: 0;
  z-index: var(--qr-loader-z);
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--qr-loader-bg);
}

/* Ambient premium background (glow + subtle noise) */
.qr-route-loader::before{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 28% 24%, var(--qr-loader-accent) 0%, transparent 58%),
    radial-gradient(circle at 78% 72%, rgba(255,255,255,.22) 0%, transparent 60%),
    radial-gradient(circle at 50% 115%, rgba(0,0,0,.55) 0%, transparent 65%);
  opacity: .18;
}

.qr-route-loader::after{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      0deg,
      rgba(255,255,255,.06) 0px,
      rgba(255,255,255,.06) 1px,
      transparent 1px,
      transparent 3px
    );
  opacity: .04;
}

/* Visible when either html has flag (early init) or element has is-active */
html.qr-route-loading .qr-route-loader,
.qr-route-loader.is-active{
  display: flex;
}

.qr-route-loader__inner{
  position: relative;
  width: min(92vw, 560px);
  padding: 28px 20px;
  text-align: center;
  color: var(--qr-loader-text);
}

/* Watermark background */
.qr-route-loader__wm{
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.qr-route-loader__wm img{
  width: min(74vw, 520px);
  max-width: 520px;
  height: auto;
  opacity: .10;
  transform: translateZ(0);
  filter: none;
  will-change: transform, opacity;
  animation: qrLoaderBreathe 5.2s ease-in-out infinite;
}

/* Logo fallback mark (when no logo image is available) */
.qr-route-loader__mark{
  width: min(58vw, 380px);
  max-width: 380px;
  aspect-ratio: 1 / 1;
  border-radius: 999px;
  opacity: .12;
  background:
    radial-gradient(circle at 30% 30%, var(--qr-loader-accent), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(255,255,255,.28), transparent 55%);
  transform: translateZ(0);
  will-change: transform, opacity;
  animation: qrLoaderBreathe 5.2s ease-in-out infinite;
}

@keyframes qrLoaderBreathe{
  0%   { transform: translateY(0) scale(1);   opacity: .08; }
  50%  { transform: translateY(-6px) scale(1.03); opacity: .12; }
  100% { transform: translateY(0) scale(1);   opacity: .08; }
}

.qr-route-loader__content{
  position: relative;
  z-index: 2;
}

/* Foreground brand badge (crisp logo above name) */
.qr-route-loader__badge{
  width: 104px;
  height: 104px;
  margin: 0 auto 14px;
  border-radius: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  box-shadow: 0 22px 60px rgba(0,0,0,.42);
  transform: translateZ(0);
  will-change: transform, opacity;
  animation: qrLoaderFloat 4.6s ease-in-out infinite;
}

.qr-route-loader__badge img{
  width: 74%;
  height: 74%;
  object-fit: contain;
  display: block;
}

.qr-route-loader__badgeMark{
  width: 70%;
  height: 70%;
  border-radius: 999px;
  background:
    radial-gradient(circle at 30% 30%, var(--qr-loader-accent), transparent 58%),
    radial-gradient(circle at 70% 70%, rgba(255,255,255,.32), transparent 58%);
  opacity: .95;
}

@keyframes qrLoaderFloat{
  0%   { transform: translateY(0) scale(1); }
  50%  { transform: translateY(-6px) scale(1.02); }
  100% { transform: translateY(0) scale(1); }
}

.qr-route-loader__name{
  font-weight: 800;
  font-size: 20px;
  line-height: 1.15;
  letter-spacing: .2px;
  text-wrap: balance;
}

.qr-route-loader__sub{
  margin-top: 8px;
  font-size: 13px;
  color: var(--qr-loader-muted);
}

.qr-route-loader__accent{
  width: 64px;
  height: 4px;
  border-radius: 999px;
  margin: 12px auto 0;
  background: var(--qr-loader-accent);
  box-shadow: 0 8px 28px rgba(0,0,0,.25);
}

/* Fade-out when hiding (opacity only) */
.qr-route-loader.is-hiding{
  opacity: 0;
  transition: opacity 180ms ease;
}

/* Progressive image reveal */
img.qr-img-progressive{
  filter: blur(14px);
  opacity: 0;
  transform: scale(1.02);
  will-change: opacity, transform;
  transition-property: opacity, transform;
  transition-duration: var(--qr-anim-med, 220ms);
  transition-timing-function: var(--qr-ease, cubic-bezier(.2,.8,.2,1));
}

img.qr-img-progressive.is-loaded{
  /* Remove blur instantly (no filter transition) */
  filter: none;
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce){
  .qr-route-loader__wm img,
  .qr-route-loader__mark,
  .qr-route-loader__badge{
    animation: none !important;
  }
  img.qr-img-progressive{
    transition: none !important;
  }
}