/*
  Mirrors login route stacking:
    login-page (container + gradient + px-3 sm:px-4)
      → LoginSkeletonComponent host (p-4 sm:p-6 md:p-8, centers child)
        → article (card).
*/

.app-initial-loader {
  position: fixed;
  inset: 0;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 100svh;
  min-height: 100dvh;
  color: var(--mat-sys-on-surface, #1c1b1f);
  z-index: 2147483000;
  transition: opacity 160ms ease-out, visibility 160ms ease-out;
}

.app-initial-loader__page {
  flex: 1 1 auto;
  box-sizing: border-box;
  display: flex;
  align-items: stretch;
  justify-content: center;
  min-height: inherit;
  padding-inline: 12px;
  padding-block: env(safe-area-inset-top, 0px) env(safe-area-inset-bottom, 0px);
  overscroll-behavior-y: none;
  background: radial-gradient(
      circle at top left,
      var(--app-norzux-glow-blue, rgb(38 99 255 / 0.26)),
      transparent 30%
    ),
    radial-gradient(
      circle at bottom right,
      var(--app-norzux-glow-violet, rgb(138 63 252 / 0.2)),
      transparent 34%
    ),
    linear-gradient(
      180deg,
      var(--app-norzux-surface-start, rgb(12 12 18 / 0.96)) 0%,
      var(--app-norzux-surface-end, rgb(8 8 14 / 0.98)) 100%
    );
}

@media (min-width: 640px) {
  .app-initial-loader__page {
    padding-inline: 16px;
  }
}

.app-initial-loader__frame {
  flex: 1 1 auto;
  box-sizing: border-box;
  display: flex;
  width: 100%;
  min-height: 100%;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

@media (min-width: 640px) {
  .app-initial-loader__frame {
    padding: 24px;
  }
}

@media (min-width: 768px) {
  .app-initial-loader__frame {
    padding: 32px;
  }
}

.app-initial-loader--hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/*
  Full page refresh on an authenticated route: Firebase restores the session
  after first paint, so the app shell (app-layout) is not in the DOM yet.
  Avoid showing the login-form mimic in that window — only the top bar + surface.
*/
html[data-app-boot='app'] .app-initial-loader__page {
  background: radial-gradient(
      circle at top left,
      var(--app-norzux-glow-blue, rgb(38 99 255 / 0.26)),
      transparent 30%
    ),
    radial-gradient(
      circle at bottom right,
      var(--app-norzux-glow-violet, rgb(138 63 252 / 0.2)),
      transparent 34%
    ),
    linear-gradient(
      180deg,
      var(--app-norzux-surface-start, rgb(12 12 18 / 0.96)) 0%,
      var(--app-norzux-surface-end, rgb(8 8 14 / 0.98)) 100%
    );
}

html[data-app-boot='app'] .app-initial-loader__frame {
  display: none;
}

html[data-app-boot='app'] .app-initial-loader__spinner {
  display: flex;
}

.app-initial-loader__spinner {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2147482999;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  background-color: color-mix(in srgb, var(--mat-sys-surface, #ffffff) 52%, transparent);
}

.app-initial-loader__spinner-ring {
  box-sizing: border-box;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 3px solid var(--app-spinner-track-color, rgb(255 255 255 / 0.18));
  border-top-color: var(--app-spinner-indicator-color, #f8fafc);
  animation: app-initial-loader-spinner 0.75s linear infinite;
}

@keyframes app-initial-loader-spinner {
  to {
    transform: rotate(360deg);
  }
}

.app-initial-loader__bar {
  position: fixed;
  top: env(safe-area-inset-top, 0px);
  left: 0;
  right: 0;
  height: 4px;
  background: color-mix(in srgb, var(--mat-sys-primary, #6750a4) 18%, transparent);
  overflow: hidden;
}

.app-initial-loader__bar::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 40%;
  left: -40%;
  background: linear-gradient(
    90deg,
    transparent,
    color-mix(in srgb, var(--mat-sys-primary, #6750a4) 85%, white 15%),
    transparent
  );
  animation: app-initial-loader-bar 950ms ease-in-out infinite;
}

@keyframes app-initial-loader-bar {
  0% {
    left: -40%;
  }
  100% {
    left: 100%;
  }
}

/*
  Same as Tailwind w-full max-w-[340px] sm:max-w-[480px]: capped width scales with viewport.
  Explicit min() + shrink:0 avoids inconsistent desktop sizing under flex layouts.
 */
.app-initial-loader__card {
  flex: 0 1 auto;
  width: min(100%, 340px);
  margin-inline: auto;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgb(255 255 255 / 0.1);
  background: radial-gradient(
      circle at top left,
      var(--app-norzux-glow-blue, rgb(38 99 255 / 0.26)),
      transparent 30%
    ),
    radial-gradient(
      circle at bottom right,
      var(--app-norzux-glow-violet, rgb(138 63 252 / 0.2)),
      transparent 34%
    ),
    linear-gradient(
      180deg,
      var(--app-norzux-surface-start, rgb(12 12 18 / 0.96)) 0%,
      var(--app-norzux-surface-end, rgb(8 8 14 / 0.98)) 100%
    );
  box-shadow: inset 0 -1px 0 rgb(255 255 255 / 0.08), inset 0 1px 0 rgb(255 255 255 / 0.05);
  backdrop-filter: blur(20px);
  box-sizing: border-box;
}

@media (min-width: 640px) {
  .app-initial-loader__card {
    width: min(100%, 480px);
    padding: 24px;
    border-radius: 16px;
  }
}

@media (min-width: 768px) {
  .app-initial-loader__card {
    padding: 40px;
  }
}

.app-initial-loader__header {
  text-align: center;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

@media (min-width: 640px) {
  .app-initial-loader__header {
    margin-bottom: 32px;
  }
}

.app-initial-loader__icon-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  border-radius: 50%;
  border: 1px solid rgb(255 255 255 / 0.22);
  background-color: rgb(255 255 255 / 0.1);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.15);
  backdrop-filter: blur(8px);
  color: var(--mat-sys-on-primary, #f8fafc);
}

@media (min-width: 640px) {
  .app-initial-loader__icon-circle {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
  }
}

.app-initial-loader__icon-circle .material-icons {
  font-size: 20px;
  line-height: 1;
}

@media (min-width: 640px) {
  .app-initial-loader__icon-circle .material-icons {
    font-size: 28px;
  }
}

/*
  Title tracks login-form: text-lg (mobile) vs sm:text-2xl (~32px line box).
  Subtitle tracks text-xs vs sm:text-sm with shell muted color.
 */
.app-initial-loader__title-skel {
  width: 65%;
  height: 1.75rem;
  margin-inline: auto;
  border-radius: 0.5rem;
}

@media (min-width: 640px) {
  .app-initial-loader__title-skel {
    height: 2rem;
  }
}

.app-initial-loader__subtitle-skel {
  width: 85%;
  height: 1rem;
  margin-top: 6px;
  margin-inline: auto;
  border-radius: 0.5rem;
}

@media (min-width: 640px) {
  .app-initial-loader__subtitle-skel {
    margin-top: 8px;
    height: 1.125rem;
  }
}

.app-initial-loader__form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 640px) {
  .app-initial-loader__form {
    gap: 20px;
  }
}

/* Fake mat-form-field: label shimmer only; prefix uses Material Icons like matPrefix; input area empty like disabled input. */
.app-initial-loader__mff-stack {
  width: 100%;
  box-sizing: border-box;
}

.app-initial-loader__mff {
  position: relative;
  border: 1px solid var(--mat-sys-outline, #79747e);
  border-radius: 4px;
  box-sizing: border-box;
  min-height: 56px;
  display: flex;
  align-items: center;
  padding: 0 0 0 16px;
}

.app-initial-loader__mff-notch {
  position: absolute;
  top: -8px;
  left: 12px;
  padding: 0 4px;
  height: 16px;
  background-color: var(--mat-sys-surface, #ffffff);
  display: flex;
  align-items: center;
}

@media (min-width: 640px) {
  .app-initial-loader__mff-notch {
    top: -9px;
    left: 14px;
    height: 18px;
  }
}

.app-initial-loader__field-label-skel {
  display: inline-block;
  width: 4.5rem;
  height: 1rem;
  border-radius: 0.5rem;
}

@media (min-width: 640px) {
  .app-initial-loader__field-label-skel {
    height: 1.125rem;
  }
}

.app-initial-loader__mff-prefix {
  margin-right: 12px;
  font-size: 24px !important;
  line-height: 1;
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  letter-spacing: normal;
  text-transform: none;
  white-space: nowrap;
  direction: ltr;
  font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
  color: color-mix(in srgb, var(--mat-sys-on-surface-variant, #49454f) 72%, transparent);
  user-select: none;
}

.app-initial-loader__mff-input-plug {
  flex: 1 1 auto;
  min-height: 56px;
  min-width: 0;
  margin-inline-end: 16px;
}

.app-initial-loader__mff-subscript-gap {
  min-height: 1.25rem;
}

@media (min-width: 640px) {
  .app-initial-loader__mff-subscript-gap {
    min-height: 1.5rem;
  }
}

.app-initial-loader__button-skel {
  width: 100%;
  box-sizing: border-box;
  margin-top: 4px;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid rgb(255 255 255 / 0.28);
  background-color: rgb(255 255 255 / 0.06);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 640px) {
  .app-initial-loader__button-skel {
    margin-top: 8px;
    min-height: 48px;
    padding: 12px 24px;
    border-radius: 12px;
  }
}

.app-initial-loader__button-text-skel {
  display: inline-block;
  width: 7rem;
  height: 0.875rem;
  border-radius: 0.5rem;
}

@media (min-width: 640px) {
  .app-initial-loader__button-text-skel {
    width: 8rem;
    height: 1rem;
  }
}

.app-initial-loader__skeleton {
  background-color: color-mix(in srgb, var(--mat-sys-on-surface, #f8fafc) 10%, transparent);
  background-image: linear-gradient(
    100deg,
    transparent 20%,
    rgb(255 255 255 / 0.26) 38%,
    rgb(255 255 255 / 0.38) 50%,
    rgb(255 255 255 / 0.26) 62%,
    transparent 80%
  );
  background-size: 260% 100%;
  animation: app-initial-loader-shimmer 1.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes app-initial-loader-shimmer {
  0% {
    background-position: 160% 0;
  }
  100% {
    background-position: -160% 0;
  }
}

.app-initial-loader__sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}