/* Grasp Learning Engine — reusable loaders
 * - .grasp-spinner: in-button circular spinner
 * - .grasp-page-loader: full-screen glowing logo overlay
 */

:root {
  --grasp-loader-primary: #01acd5;
  --grasp-loader-primary-rgb: 1, 172, 213;
}

/* -------------------------------------------------------------------------- */
/* Circular spinner (button / inline)                                         */
/* -------------------------------------------------------------------------- */

.grasp-spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2.5px solid rgba(255, 255, 255, 0.35);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: grasp-spin 0.7s linear infinite;
  vertical-align: middle;
  flex-shrink: 0;
}

.grasp-spinner--primary {
  border-color: rgba(var(--grasp-loader-primary-rgb), 0.25);
  border-top-color: var(--grasp-loader-primary);
}

.grasp-spinner--sm {
  width: 1rem;
  height: 1rem;
  border-width: 2px;
}

.grasp-spinner--lg {
  width: 1.75rem;
  height: 1.75rem;
  border-width: 3px;
}

@keyframes grasp-spin {
  to {
    transform: rotate(360deg);
  }
}

/* Button loading state — works with <button> wrapping label + spinner */
.grasp-btn {
  position: relative;
}

.grasp-btn.is-loading {
  pointer-events: none;
  cursor: wait;
}

.grasp-btn.is-loading .grasp-btn__label {
  opacity: 0;
}

.grasp-btn__spinner {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
}

.grasp-btn.is-loading .grasp-btn__spinner {
  display: flex;
}

/* -------------------------------------------------------------------------- */
/* Full-page glowing logo loader                                              */
/* -------------------------------------------------------------------------- */

.grasp-page-loader {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  background: rgba(248, 250, 252, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.45s ease, visibility 0.45s ease;
}

.grasp-page-loader.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* -------------------------------------------------------------------------- */
/* Smooth entry into app shell (menu + content)                               */
/* -------------------------------------------------------------------------- */

html.grasp-entry .widget-container {
  opacity: 0;
  transform: translate3d(0, 10px, 0);
  will-change: opacity, transform;
}

html.grasp-entry.grasp-reveal .widget-container {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transition:
    opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.grasp-page-loader__mark {
  position: relative;
  width: 5.5rem;
  height: 5.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.grasp-page-loader__glow {
  position: absolute;
  inset: -30%;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(var(--grasp-loader-primary-rgb), 0.55) 0%,
    rgba(var(--grasp-loader-primary-rgb), 0.18) 45%,
    transparent 70%
  );
  animation: grasp-glow-pulse 1.6s ease-in-out infinite;
  pointer-events: none;
}

.grasp-page-loader__logo {
  position: relative;
  z-index: 1;
  width: 4.25rem;
  height: 4.25rem;
  object-fit: contain;
  animation: grasp-logo-breathe 1.6s ease-in-out infinite;
  filter: drop-shadow(0 0 12px rgba(var(--grasp-loader-primary-rgb), 0.65))
    drop-shadow(0 0 28px rgba(var(--grasp-loader-primary-rgb), 0.35));
}

.grasp-page-loader__label {
  font-size: 0.875rem;
  font-weight: 500;
  color: #64748b;
  letter-spacing: 0.01em;
  margin: 0;
  animation: grasp-fade-pulse 1.6s ease-in-out infinite;
}

@keyframes grasp-glow-pulse {
  0%,
  100% {
    transform: scale(0.92);
    opacity: 0.7;
  }
  50% {
    transform: scale(1.12);
    opacity: 1;
  }
}

@keyframes grasp-logo-breathe {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.06);
  }
}

@keyframes grasp-fade-pulse {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .grasp-spinner,
  .grasp-page-loader__glow,
  .grasp-page-loader__logo,
  .grasp-page-loader__label {
    animation: none;
  }

  html.grasp-entry .widget-container,
  html.grasp-entry.grasp-reveal .widget-container,
  .grasp-page-loader {
    transition: none !important;
    transform: none !important;
  }
}