:root {
  --motion-duration-instant: 120ms;
  --motion-duration-control: 180ms;
  --motion-duration-standard: 280ms;
  --motion-duration-page: 380ms;
  --motion-duration-hero: 520ms;
  --motion-duration-modal: 320ms;
  --motion-ease-standard: cubic-bezier(0.2, 0.72, 0.22, 1);
  --motion-ease-emphasized: cubic-bezier(0.16, 0.84, 0.22, 1);
  --motion-ease-exit: cubic-bezier(0.4, 0, 1, 1);
  --motion-navigation-control-duration: 160ms;
  --motion-navigation-duration: 520ms;
  --motion-navigation-ease: cubic-bezier(0.2, 0.72, 0.22, 1);
  --motion-spinner-duration: 760ms;
  --motion-scan-duration: 1.65s;
  --motion-skeleton-duration: 1.25s;
  --motion-refresh-duration: 700ms;
  --motion-brief-skeleton-duration: 1.1s;
  --motion-pulse-duration: 1s;
  --motion-press-scale: 0.985;
}

/* Login and Home retain their approved pacing. Signed-in content screens use a
   calmer profile without changing the established motion shapes. */
body:not(.entry-mode):not(.home-dashboard-active) {
  --motion-duration-control: 220ms;
  --motion-duration-standard: 340ms;
  --motion-duration-page: 440ms;
  --motion-duration-hero: 600ms;
  --motion-duration-modal: 380ms;
  --motion-ease-standard: cubic-bezier(0.22, 0.61, 0.36, 1);
  --motion-ease-emphasized: cubic-bezier(0.16, 0.76, 0.24, 1);
  --motion-ease-exit: cubic-bezier(0.4, 0, 0.2, 1);
  --motion-navigation-control-duration: 220ms;
  --motion-navigation-duration: 640ms;
  --motion-navigation-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --motion-spinner-duration: 900ms;
  --motion-scan-duration: 2s;
  --motion-skeleton-duration: 1.5s;
  --motion-refresh-duration: 900ms;
  --motion-brief-skeleton-duration: 1.4s;
  --motion-pulse-duration: 1.25s;
}

.motion-system-ready body,
.motion-system-ready .screen,
.motion-system-ready :is(button, summary, .module-card, .answer-option, .logbook-flight-card) {
  transform-origin: center;
}

.motion-system-ready body {
  transition:
    background-color var(--motion-duration-standard) var(--motion-ease-standard),
    color var(--motion-duration-standard) var(--motion-ease-standard);
}

.motion-system-ready :is(
  button,
  [role="button"],
  .module-card,
  .answer-option,
  .logbook-flight-card-main,
  summary
) {
  transition-property: transform, opacity, filter, border-color, background-color, box-shadow, color;
  transition-duration: var(--motion-duration-control);
  transition-timing-function: var(--motion-ease-standard);
}

.motion-system-ready .motion-pressed:not(.aircraft-menu-button):not(.aircraft-main-control):not(.tab-main-menu) {
  transform: scale(var(--motion-press-scale)) !important;
  filter: brightness(0.97);
}

.motion-system-ready :is(.aircraft-menu-button, .aircraft-main-control).motion-pressed > * {
  transform: scale(var(--motion-press-scale));
  filter: brightness(0.97);
}

.motion-system-ready .tab-main-menu.motion-pressed {
  filter: brightness(0.97);
}

.motion-system-ready :is(button, [role="button"]):disabled {
  opacity: 0.58;
  filter: saturate(0.74);
}

.motion-system-ready .tab .tab-icon,
.motion-system-ready .tab .tab-label,
.motion-system-ready .segment {
  transition:
    transform var(--motion-duration-control) var(--motion-ease-standard),
    opacity var(--motion-duration-control) ease,
    color var(--motion-duration-control) ease,
    background-color var(--motion-duration-control) ease;
}

.motion-system-ready .tab:not(.tab-main-menu).active .tab-icon {
  transform: translate3d(0, -1px, 0) scale(1.04);
}

.motion-system-ready .tab-main-menu.active .tab-icon {
  transform: none;
}

.motion-system-ready .tab.active .tab-label {
  opacity: 1;
}

.motion-page-enter-forward {
  animation: motionPageEnterForward var(--motion-duration-page) var(--motion-ease-emphasized) both;
  backface-visibility: hidden;
  will-change: opacity, transform;
}

.motion-page-enter-back {
  animation: motionPageEnterBack var(--motion-duration-page) var(--motion-ease-emphasized) both;
  backface-visibility: hidden;
  will-change: opacity, transform;
}

.motion-page-enter-crossfade {
  animation: motionPageCrossfade var(--motion-duration-standard) ease-out both;
  will-change: opacity;
}

@keyframes motionPageEnterForward {
  from {
    opacity: 0.35;
    transform: translate3d(14px, 0, 0) scale(0.996);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
  }
}

@keyframes motionPageEnterBack {
  from {
    opacity: 0.35;
    transform: translate3d(-12px, 0, 0) scale(0.998);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
  }
}

@keyframes motionPageCrossfade {
  from { opacity: 0.35; }
  to { opacity: 1; }
}

.motion-stagger-item {
  opacity: 0;
  transform: translate3d(0, 8px, 0);
}

.motion-stagger-item.motion-stagger-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transition:
    opacity var(--motion-duration-page) var(--motion-ease-standard) var(--motion-stagger-delay, 0ms),
    transform var(--motion-duration-page) var(--motion-ease-standard) var(--motion-stagger-delay, 0ms);
}

.motion-overlay-managed.motion-hidden {
  display: none !important;
}

.motion-overlay-managed.hidden:not(.motion-hidden) {
  display: grid !important;
  pointer-events: none;
}

.motion-overlay-managed.motion-overlay-enter {
  animation: motionOverlayIn var(--motion-duration-control) ease-out both;
}

.motion-overlay-managed.motion-overlay-exit {
  animation: motionOverlayOut var(--motion-duration-control) var(--motion-ease-exit) both;
}

.motion-overlay-managed.motion-overlay-enter > :is([role="dialog"], .drawer-card, article, img) {
  animation: motionDialogIn var(--motion-duration-modal) var(--motion-ease-emphasized) both;
  backface-visibility: hidden;
  will-change: opacity, transform;
}

.motion-overlay-managed.motion-overlay-exit > :is([role="dialog"], .drawer-card, article, img) {
  animation: motionDialogOut var(--motion-duration-control) var(--motion-ease-exit) both;
  backface-visibility: hidden;
  will-change: opacity, transform;
}

@keyframes motionOverlayIn {
  from { background-color: transparent; }
}

@keyframes motionOverlayOut {
  to {
    opacity: 0;
    background-color: transparent;
  }
}

@keyframes motionDialogIn {
  from {
    opacity: 0;
    transform: translate3d(0, 12px, 0) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
  }
}

@keyframes motionDialogOut {
  to {
    opacity: 0;
    transform: translate3d(0, 6px, 0) scale(0.992);
  }
}

.motion-system-ready details .disclosure-chevron {
  transition: transform var(--motion-duration-control) var(--motion-ease-standard);
}

.motion-system-ready details[open] .disclosure-chevron {
  transform: rotate(90deg);
}

.motion-system-ready details[open] > :not(summary) {
  animation: motionDisclosureIn var(--motion-duration-standard) var(--motion-ease-standard) both;
}

@keyframes motionDisclosureIn {
  from {
    opacity: 0;
    transform: translate3d(0, -4px, 0);
  }
}

.motion-loading {
  position: relative;
  cursor: wait;
}

.motion-loading > * {
  opacity: 0.28;
}

.motion-loading::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 18px;
  margin: -9px 0 0 -9px;
  border: 2px solid color-mix(in srgb, currentColor 28%, transparent);
  border-top-color: currentColor;
  border-radius: 50%;
  content: "";
  animation: motionSpinner var(--motion-spinner-duration) linear infinite;
}

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

.motion-feedback-success {
  animation: motionSuccess var(--motion-duration-standard) var(--motion-ease-emphasized) both;
}

.motion-feedback-error {
  animation: motionError var(--motion-duration-standard) var(--motion-ease-standard) both;
}

.motion-feedback-warning,
.motion-feedback-selection {
  animation: motionSelection var(--motion-duration-control) var(--motion-ease-standard) both;
}

@keyframes motionSuccess {
  50% {
    border-color: color-mix(in srgb, var(--status-success) 75%, var(--line));
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--status-success) 16%, transparent);
  }
}

@keyframes motionError {
  35% { transform: translate3d(-3px, 0, 0); }
  70% { transform: translate3d(2px, 0, 0); }
}

@keyframes motionSelection {
  50% { filter: brightness(1.05); }
}

.motion-system-ready .feedback:not(.hidden),
.motion-system-ready :is(.field-error, .field-message, [role="alert"]):not(:empty) {
  animation: motionFeedbackReveal var(--motion-duration-standard) var(--motion-ease-standard) both;
}

@keyframes motionFeedbackReveal {
  from {
    opacity: 0;
    transform: translate3d(0, 5px, 0);
  }
}

.motion-system-ready .answer-option.correct {
  box-shadow: inset 3px 0 0 var(--green);
}

.motion-system-ready .answer-option.wrong {
  box-shadow: inset 3px 0 0 var(--danger);
}

.motion-system-ready .question-grid-button[aria-current="step"] {
  transition:
    border-color var(--motion-duration-control) ease,
    background-color var(--motion-duration-control) ease,
    box-shadow var(--motion-duration-control) ease;
}

.motion-system-ready .progress-bar {
  transition:
    width var(--motion-duration-page) ease-in-out,
    background-color var(--motion-duration-page) ease-in-out;
}

.motion-processing .logbook-scan-preview {
  position: relative;
  min-height: 92px;
  overflow: hidden;
}

.motion-processing .logbook-scan-preview::after {
  position: absolute;
  right: 10px;
  left: 10px;
  top: 14px;
  height: 2px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent-primary) 82%, white);
  box-shadow: 0 0 10px color-mix(in srgb, var(--accent-primary) 48%, transparent);
  content: "";
  animation: motionScanLine var(--motion-scan-duration) ease-in-out infinite alternate;
}

@keyframes motionScanLine {
  to { transform: translateY(62px); }
}

.brief-loading-skeleton span,
.motion-skeleton {
  background-image: linear-gradient(
    100deg,
    color-mix(in srgb, var(--surface-2) 92%, transparent) 15%,
    color-mix(in srgb, var(--surface) 88%, var(--accent-soft)) 45%,
    color-mix(in srgb, var(--surface-2) 92%, transparent) 75%
  );
  background-size: 220% 100%;
  animation: motionSkeleton var(--motion-skeleton-duration) ease-in-out infinite;
}

@keyframes motionSkeleton {
  to { background-position: -120% 0; }
}

.motion-offline .offline-status-banner,
.motion-offline [data-offline-banner] {
  animation: motionOfflineIn var(--motion-duration-standard) var(--motion-ease-standard) both;
}

@keyframes motionOfflineIn {
  from {
    opacity: 0;
    transform: translate3d(0, -6px, 0);
  }
}

.native-differentiate-without-color .answer-option.correct {
  border-style: double;
  border-width: 3px;
}

.native-differentiate-without-color .answer-option.wrong {
  border-style: dashed;
  border-width: 2px;
}

.native-increased-contrast :is(.panel, .quiz-card, .module-card, .answer-option, input, select, textarea) {
  border-color: color-mix(in srgb, var(--ink) 54%, var(--line));
}

.native-reduce-transparency :is(.tabs, .quiz-actions, .app-toast, .drawer-card) {
  -webkit-backdrop-filter: none !important;
  backdrop-filter: none !important;
  background-color: var(--surface) !important;
}

.native-bold-text body {
  font-weight: 540;
}

.motion-paused *,
.motion-paused *::before,
.motion-paused *::after {
  animation-play-state: paused !important;
}

@media (prefers-reduced-motion: reduce) {
  .motion-page-enter-forward,
  .motion-page-enter-back,
  .motion-page-enter-crossfade,
  .motion-overlay-managed.motion-overlay-enter,
  .motion-overlay-managed.motion-overlay-exit,
  .motion-overlay-managed.motion-overlay-enter > :is([role="dialog"], .drawer-card, article, img),
  .motion-overlay-managed.motion-overlay-exit > :is([role="dialog"], .drawer-card, article, img),
  .motion-system-ready .feedback:not(.hidden) {
    animation: motionPageCrossfade var(--motion-duration-instant) ease-out both !important;
  }

  .motion-stagger-item,
  .motion-stagger-item.motion-stagger-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .motion-processing .logbook-scan-preview::after,
  .brief-loading-skeleton span,
  .motion-skeleton {
    animation: none !important;
  }
}

:is(.reduce-motion, .native-reduce-motion) .motion-page-enter-forward,
:is(.reduce-motion, .native-reduce-motion) .motion-page-enter-back,
:is(.reduce-motion, .native-reduce-motion) .motion-page-enter-crossfade,
:is(.reduce-motion, .native-reduce-motion) .motion-overlay-managed.motion-overlay-enter,
:is(.reduce-motion, .native-reduce-motion) .motion-overlay-managed.motion-overlay-exit {
  animation: motionPageCrossfade var(--motion-duration-instant) ease-out both !important;
}

:is(.reduce-motion, .native-reduce-motion) .motion-stagger-item,
:is(.reduce-motion, .native-reduce-motion) .motion-stagger-item.motion-stagger-visible {
  opacity: 1;
  transform: none;
  transition: none !important;
}

:is(.reduce-motion, .native-reduce-motion) .motion-processing .logbook-scan-preview::after,
:is(.reduce-motion, .native-reduce-motion) .brief-loading-skeleton span,
:is(.reduce-motion, .native-reduce-motion) .motion-skeleton {
  animation: none !important;
}